id	sid	tid	token	lemma	pos
ajst-1488	1	1	academic	academic	ADJ
ajst-1488	1	2	journal	journal	NOUN
ajst-1488	1	3	of	of	ADP
ajst-1488	1	4	science	science	NOUN
ajst-1488	1	5	and	and	CCONJ
ajst-1488	1	6	technology	technology	NOUN
ajst-1488	1	7	issn	issn	NOUN
ajst-1488	1	8	:	:	PUNCT
ajst-1488	1	9	2771	2771	NUM
ajst-1488	1	10	-	-	SYM
ajst-1488	1	11	3032	3032	NUM
ajst-1488	1	12	|	|	NOUN
ajst-1488	1	13	vol	vol	NOUN
ajst-1488	1	14	.	.	PROPN
ajst-1488	2	1	2	2	NUM
ajst-1488	2	2	,	,	PUNCT
ajst-1488	2	3	no	no	INTJ
ajst-1488	2	4	.	.	NOUN
ajst-1488	2	5	3	3	NUM
ajst-1488	2	6	,	,	PUNCT
ajst-1488	2	7	2022	2022	NUM
ajst-1488	2	8	45	45	NUM
ajst-1488	2	9	visualization	visualization	NOUN
ajst-1488	2	10	analysis	analysis	NOUN
ajst-1488	2	11	of	of	ADP
ajst-1488	2	12	research	research	NOUN
ajst-1488	2	13	status	status	NOUN
ajst-1488	2	14	and	and	CCONJ
ajst-1488	2	15	hotspots	hotspot	NOUN
ajst-1488	2	16	of	of	ADP
ajst-1488	2	17	christmas	christmas	PROPN
ajst-1488	2	18	trees	tree	NOUN
ajst-1488	2	19	based	base	VERB
ajst-1488	2	20	on	on	ADP
ajst-1488	2	21	citespace	citespace	PROPN
ajst-1488	2	22	mao	mao	PROPN
ajst-1488	3	1	ni	ni	PROPN
ajst-1488	3	2	,	,	PUNCT
ajst-1488	3	3	mingjiang	mingjiang	PROPN
ajst-1488	3	4	shi	shi	PROPN
ajst-1488	3	5	school	school	PROPN
ajst-1488	3	6	of	of	ADP
ajst-1488	3	7	mechatronic	mechatronic	ADJ
ajst-1488	3	8	engineering	engineering	NOUN
ajst-1488	3	9	,	,	PUNCT
ajst-1488	3	10	southwest	southwest	ADJ
ajst-1488	3	11	petroleum	petroleum	PROPN
ajst-1488	3	12	university	university	PROPN
ajst-1488	3	13	,	,	PUNCT
ajst-1488	3	14	chengdu	chengdu	PROPN
ajst-1488	3	15	,	,	PUNCT
ajst-1488	3	16	sichuan	sichuan	PROPN
ajst-1488	3	17	610500	610500	NUM
ajst-1488	3	18	,	,	PUNCT
ajst-1488	3	19	china	china	PROPN
ajst-1488	3	20	abstract	abstract	NOUN
ajst-1488	3	21	:	:	PUNCT
ajst-1488	3	22	this	this	DET
ajst-1488	3	23	paper	paper	NOUN
ajst-1488	3	24	aims	aim	VERB
ajst-1488	3	25	to	to	PART
ajst-1488	3	26	discuss	discuss	VERB
ajst-1488	3	27	the	the	DET
ajst-1488	3	28	research	research	NOUN
ajst-1488	3	29	frontiers	frontier	NOUN
ajst-1488	3	30	and	and	CCONJ
ajst-1488	3	31	research	research	NOUN
ajst-1488	3	32	hotspots	hotspot	NOUN
ajst-1488	3	33	of	of	ADP
ajst-1488	3	34	christmas	christmas	PROPN
ajst-1488	3	35	trees	tree	NOUN
ajst-1488	3	36	,	,	PUNCT
ajst-1488	3	37	compare	compare	VERB
ajst-1488	3	38	and	and	CCONJ
ajst-1488	3	39	summarize	summarize	VERB
ajst-1488	3	40	the	the	DET
ajst-1488	3	41	current	current	ADJ
ajst-1488	3	42	research	research	NOUN
ajst-1488	3	43	status	status	NOUN
ajst-1488	3	44	of	of	ADP
ajst-1488	3	45	christmas	christmas	PROPN
ajst-1488	3	46	trees	tree	NOUN
ajst-1488	3	47	,	,	PUNCT
ajst-1488	3	48	with	with	ADP
ajst-1488	3	49	a	a	DET
ajst-1488	3	50	view	view	NOUN
ajst-1488	3	51	to	to	ADP
ajst-1488	3	52	providing	provide	VERB
ajst-1488	3	53	references	reference	NOUN
ajst-1488	3	54	for	for	ADP
ajst-1488	3	55	the	the	DET
ajst-1488	3	56	establishment	establishment	NOUN
ajst-1488	3	57	of	of	ADP
ajst-1488	3	58	universally	universally	ADV
ajst-1488	3	59	applicable	applicable	ADJ
ajst-1488	3	60	christmas	christmas	NOUN
ajst-1488	3	61	trees	tree	NOUN
ajst-1488	3	62	and	and	CCONJ
ajst-1488	3	63	related	relate	VERB
ajst-1488	3	64	scientific	scientific	ADJ
ajst-1488	3	65	research	research	NOUN
ajst-1488	3	66	.	.	PUNCT
ajst-1488	4	1	this	this	DET
ajst-1488	4	2	paper	paper	NOUN
ajst-1488	4	3	is	be	AUX
ajst-1488	4	4	based	base	VERB
ajst-1488	4	5	on	on	ADP
ajst-1488	4	6	the	the	DET
ajst-1488	4	7	web	web	NOUN
ajst-1488	4	8	of	of	ADP
ajst-1488	4	9	science	science	NOUN
ajst-1488	4	10	(	(	PUNCT
ajst-1488	4	11	wos	wos	NOUN
ajst-1488	4	12	)	)	PUNCT
ajst-1488	4	13	and	and	CCONJ
ajst-1488	4	14	china	china	PROPN
ajst-1488	4	15	national	national	PROPN
ajst-1488	4	16	knowledge	knowledge	PROPN
ajst-1488	4	17	infrastructure	infrastructure	PROPN
ajst-1488	4	18	(	(	PUNCT
ajst-1488	4	19	cnki	cnki	ADJ
ajst-1488	4	20	)	)	PUNCT
ajst-1488	4	21	databases	database	NOUN
ajst-1488	4	22	with	with	ADP
ajst-1488	4	23	"	"	PUNCT
ajst-1488	4	24	christmas	christmas	PROPN
ajst-1488	4	25	trees	tree	NOUN
ajst-1488	4	26	"	"	PUNCT
ajst-1488	4	27	is	be	AUX
ajst-1488	4	28	selected	select	VERB
ajst-1488	4	29	for	for	ADP
ajst-1488	4	30	the	the	DET
ajst-1488	4	31	subject	subject	ADJ
ajst-1488	4	32	term	term	NOUN
ajst-1488	4	33	to	to	PART
ajst-1488	4	34	perform	perform	VERB
ajst-1488	4	35	visual	visual	ADJ
ajst-1488	4	36	analysis	analysis	NOUN
ajst-1488	4	37	and	and	CCONJ
ajst-1488	4	38	comparison	comparison	NOUN
ajst-1488	4	39	of	of	ADP
ajst-1488	4	40	722	722	NUM
ajst-1488	4	41	wos	wos	ADJ
ajst-1488	4	42	documents	document	NOUN
ajst-1488	4	43	and	and	CCONJ
ajst-1488	4	44	2267	2267	NUM
ajst-1488	4	45	cnki	cnki	ADJ
ajst-1488	4	46	documents	document	NOUN
ajst-1488	4	47	after	after	ADP
ajst-1488	4	48	deduplication	deduplication	NOUN
ajst-1488	4	49	by	by	ADP
ajst-1488	4	50	year	year	NOUN
ajst-1488	4	51	,	,	PUNCT
ajst-1488	4	52	country	country	NOUN
ajst-1488	4	53	/	/	SYM
ajst-1488	4	54	region	region	NOUN
ajst-1488	4	55	,	,	PUNCT
ajst-1488	4	56	institution	institution	NOUN
ajst-1488	4	57	,	,	PUNCT
ajst-1488	4	58	journal	journal	NOUN
ajst-1488	4	59	,	,	PUNCT
ajst-1488	4	60	author	author	NOUN
ajst-1488	4	61	,	,	PUNCT
ajst-1488	4	62	hotspots	hotspot	NOUN
ajst-1488	4	63	,	,	PUNCT
ajst-1488	4	64	keywords	keyword	NOUN
ajst-1488	4	65	,	,	PUNCT
ajst-1488	4	66	keyword	keyword	NOUN
ajst-1488	4	67	cluster	cluster	NOUN
ajst-1488	4	68	,	,	PUNCT
ajst-1488	4	69	etc	etc	X
ajst-1488	4	70	.	.	X
ajst-1488	5	1	analyze	analyze	VERB
ajst-1488	5	2	,	,	PUNCT
ajst-1488	5	3	obtain	obtain	VERB
ajst-1488	5	4	the	the	DET
ajst-1488	5	5	visual	visual	ADJ
ajst-1488	5	6	analysis	analysis	NOUN
ajst-1488	5	7	results	result	NOUN
ajst-1488	5	8	of	of	ADP
ajst-1488	5	9	subsea	subsea	NOUN
ajst-1488	5	10	christmas	christmas	NOUN
ajst-1488	5	11	trees	tree	NOUN
ajst-1488	5	12	as	as	ADP
ajst-1488	5	13	a	a	DET
ajst-1488	5	14	research	research	NOUN
ajst-1488	5	15	hotspot	hotspot	NOUN
ajst-1488	5	16	.	.	PUNCT
ajst-1488	6	1	keywords	keyword	NOUN
ajst-1488	6	2	:	:	PUNCT
ajst-1488	6	3	christmas	christmas	PROPN
ajst-1488	6	4	tree	tree	NOUN
ajst-1488	6	5	,	,	PUNCT
ajst-1488	6	6	visualization	visualization	NOUN
ajst-1488	6	7	analysis	analysis	NOUN
ajst-1488	6	8	,	,	PUNCT
ajst-1488	6	9	citespace	citespace	NOUN
ajst-1488	6	10	.	.	PUNCT
ajst-1488	7	1	1	1	X
ajst-1488	7	2	.	.	X
ajst-1488	7	3	introduction	introduction	NOUN
ajst-1488	7	4	christmas	christmas	PROPN
ajst-1488	7	5	trees	tree	NOUN
ajst-1488	7	6	are	be	AUX
ajst-1488	7	7	wellhead	wellhead	NOUN
ajst-1488	7	8	devices	device	NOUN
ajst-1488	7	9	used	use	VERB
ajst-1488	7	10	to	to	PART
ajst-1488	7	11	extract	extract	VERB
ajst-1488	7	12	oil	oil	NOUN
ajst-1488	7	13	from	from	ADP
ajst-1488	7	14	blowing	blow	VERB
ajst-1488	7	15	wells	well	NOUN
ajst-1488	7	16	and	and	CCONJ
ajst-1488	7	17	machine	machine	NOUN
ajst-1488	7	18	production	production	NOUN
ajst-1488	7	19	wells	well	NOUN
ajst-1488	8	1	[	[	X
ajst-1488	8	2	1	1	NUM
ajst-1488	8	3	]	]	PUNCT
ajst-1488	8	4	.	.	PUNCT
ajst-1488	9	1	it	it	PRON
ajst-1488	9	2	is	be	AUX
ajst-1488	9	3	the	the	DET
ajst-1488	9	4	main	main	ADJ
ajst-1488	9	5	equipment	equipment	NOUN
ajst-1488	9	6	used	use	VERB
ajst-1488	9	7	to	to	PART
ajst-1488	9	8	control	control	VERB
ajst-1488	9	9	and	and	CCONJ
ajst-1488	9	10	regulate	regulate	VERB
ajst-1488	9	11	oil	oil	NOUN
ajst-1488	9	12	and	and	CCONJ
ajst-1488	9	13	gas	gas	NOUN
ajst-1488	9	14	production	production	NOUN
ajst-1488	9	15	in	in	ADP
ajst-1488	9	16	the	the	DET
ajst-1488	9	17	uppermost	uppermost	ADJ
ajst-1488	9	18	part	part	NOUN
ajst-1488	9	19	of	of	ADP
ajst-1488	9	20	oil	oil	NOUN
ajst-1488	9	21	and	and	CCONJ
ajst-1488	9	22	gas	gas	NOUN
ajst-1488	9	23	wells	well	NOUN
ajst-1488	9	24	.	.	PUNCT
ajst-1488	10	1	it	it	PRON
ajst-1488	10	2	is	be	AUX
ajst-1488	10	3	mainly	mainly	ADV
ajst-1488	10	4	composed	compose	VERB
ajst-1488	10	5	of	of	ADP
ajst-1488	10	6	a	a	DET
ajst-1488	10	7	casing	case	VERB
ajst-1488	10	8	head	head	NOUN
ajst-1488	10	9	,	,	PUNCT
ajst-1488	10	10	tubing	tubing	NOUN
ajst-1488	10	11	head	head	NOUN
ajst-1488	10	12	,	,	PUNCT
ajst-1488	10	13	and	and	CCONJ
ajst-1488	10	14	christmas	christmas	PROPN
ajst-1488	10	15	tree	tree	NOUN
ajst-1488	10	16	[	[	X
ajst-1488	10	17	2	2	NUM
ajst-1488	10	18	]	]	PUNCT
ajst-1488	10	19	.	.	PUNCT
ajst-1488	11	1	wellhead	wellhead	NOUN
ajst-1488	11	2	christmas	christmas	PROPN
ajst-1488	11	3	tree	tree	NOUN
ajst-1488	11	4	is	be	AUX
ajst-1488	11	5	one	one	NUM
ajst-1488	11	6	of	of	ADP
ajst-1488	11	7	the	the	DET
ajst-1488	11	8	core	core	NOUN
ajst-1488	11	9	equipment	equipment	NOUN
ajst-1488	11	10	in	in	ADP
ajst-1488	11	11	the	the	DET
ajst-1488	11	12	process	process	NOUN
ajst-1488	11	13	of	of	ADP
ajst-1488	11	14	oil	oil	NOUN
ajst-1488	11	15	and	and	CCONJ
ajst-1488	11	16	gas	gas	NOUN
ajst-1488	11	17	exploitation	exploitation	NOUN
ajst-1488	11	18	,	,	PUNCT
ajst-1488	11	19	which	which	PRON
ajst-1488	11	20	plays	play	VERB
ajst-1488	11	21	a	a	DET
ajst-1488	11	22	crucial	crucial	ADJ
ajst-1488	11	23	role	role	NOUN
ajst-1488	11	24	in	in	ADP
ajst-1488	11	25	the	the	DET
ajst-1488	11	26	production	production	NOUN
ajst-1488	11	27	and	and	CCONJ
ajst-1488	11	28	safety	safety	NOUN
ajst-1488	11	29	of	of	ADP
ajst-1488	11	30	oil	oil	NOUN
ajst-1488	11	31	wells	well	NOUN
ajst-1488	12	1	[	[	X
ajst-1488	12	2	3	3	NUM
ajst-1488	12	3	]	]	PUNCT
ajst-1488	12	4	.	.	PUNCT
ajst-1488	13	1	citespace	citespace	NOUN
ajst-1488	13	2	software	software	NOUN
ajst-1488	13	3	[	[	X
ajst-1488	13	4	4	4	X
ajst-1488	13	5	]	]	PUNCT
ajst-1488	13	6	is	be	AUX
ajst-1488	13	7	a	a	DET
ajst-1488	13	8	document	document	NOUN
ajst-1488	13	9	visualization	visualization	NOUN
ajst-1488	13	10	analysis	analysis	NOUN
ajst-1488	13	11	software	software	NOUN
ajst-1488	13	12	gradually	gradually	ADV
ajst-1488	13	13	developed	develop	VERB
ajst-1488	13	14	under	under	ADP
ajst-1488	13	15	the	the	DET
ajst-1488	13	16	background	background	NOUN
ajst-1488	13	17	of	of	ADP
ajst-1488	13	18	scientometrics	scientometric	NOUN
ajst-1488	13	19	and	and	CCONJ
ajst-1488	13	20	data	datum	NOUN
ajst-1488	13	21	visualization	visualization	NOUN
ajst-1488	13	22	.	.	PUNCT
ajst-1488	14	1	through	through	ADP
ajst-1488	14	2	visualization	visualization	NOUN
ajst-1488	14	3	,	,	PUNCT
ajst-1488	14	4	the	the	DET
ajst-1488	14	5	basic	basic	ADJ
ajst-1488	14	6	knowledge	knowledge	NOUN
ajst-1488	14	7	and	and	CCONJ
ajst-1488	14	8	research	research	NOUN
ajst-1488	14	9	hotspots	hotspot	NOUN
ajst-1488	14	10	of	of	ADP
ajst-1488	14	11	literature	literature	NOUN
ajst-1488	14	12	in	in	ADP
ajst-1488	14	13	a	a	DET
ajst-1488	14	14	certain	certain	ADJ
ajst-1488	14	15	research	research	NOUN
ajst-1488	14	16	field	field	NOUN
ajst-1488	14	17	can	can	AUX
ajst-1488	14	18	be	be	AUX
ajst-1488	14	19	presented	present	VERB
ajst-1488	14	20	,	,	PUNCT
ajst-1488	14	21	and	and	CCONJ
ajst-1488	14	22	the	the	DET
ajst-1488	14	23	research	research	NOUN
ajst-1488	14	24	characteristics	characteristic	NOUN
ajst-1488	14	25	and	and	CCONJ
ajst-1488	14	26	evolution	evolution	NOUN
ajst-1488	14	27	trends	trend	NOUN
ajst-1488	14	28	can	can	AUX
ajst-1488	14	29	be	be	AUX
ajst-1488	14	30	predicted	predict	VERB
ajst-1488	14	31	.	.	PUNCT
ajst-1488	15	1	in	in	ADP
ajst-1488	15	2	this	this	DET
ajst-1488	15	3	paper	paper	NOUN
ajst-1488	15	4	,	,	PUNCT
ajst-1488	15	5	the	the	DET
ajst-1488	15	6	web	web	NOUN
ajst-1488	15	7	of	of	ADP
ajst-1488	15	8	science	science	NOUN
ajst-1488	15	9	(	(	PUNCT
ajst-1488	15	10	wos	wos	NOUN
ajst-1488	15	11	)	)	PUNCT
ajst-1488	15	12	and	and	CCONJ
ajst-1488	15	13	china	china	PROPN
ajst-1488	15	14	national	national	PROPN
ajst-1488	15	15	knowledge	knowledge	PROPN
ajst-1488	15	16	infrastructure	infrastructure	PROPN
ajst-1488	15	17	(	(	PUNCT
ajst-1488	15	18	cnki	cnki	ADJ
ajst-1488	15	19	)	)	PUNCT
ajst-1488	15	20	database	database	NOUN
ajst-1488	15	21	were	be	AUX
ajst-1488	15	22	used	use	VERB
ajst-1488	15	23	as	as	ADP
ajst-1488	15	24	data	datum	NOUN
ajst-1488	15	25	sources	source	NOUN
ajst-1488	15	26	,	,	PUNCT
ajst-1488	15	27	and	and	CCONJ
ajst-1488	15	28	citespace	citespace	NOUN
ajst-1488	15	29	software	software	NOUN
ajst-1488	15	30	was	be	AUX
ajst-1488	15	31	used	use	VERB
ajst-1488	15	32	to	to	PART
ajst-1488	15	33	visually	visually	ADV
ajst-1488	15	34	analyze	analyze	VERB
ajst-1488	15	35	the	the	DET
ajst-1488	15	36	current	current	ADJ
ajst-1488	15	37	situation	situation	NOUN
ajst-1488	15	38	and	and	CCONJ
ajst-1488	15	39	hot	hot	ADJ
ajst-1488	15	40	spots	spot	NOUN
ajst-1488	15	41	of	of	ADP
ajst-1488	15	42	christmas	christmas	PROPN
ajst-1488	15	43	tree	tree	NOUN
ajst-1488	15	44	research	research	NOUN
ajst-1488	15	45	,	,	PUNCT
ajst-1488	15	46	to	to	PART
ajst-1488	15	47	objectively	objectively	ADV
ajst-1488	15	48	provide	provide	VERB
ajst-1488	15	49	information	information	NOUN
ajst-1488	15	50	in	in	ADP
ajst-1488	15	51	the	the	DET
ajst-1488	15	52	field	field	NOUN
ajst-1488	15	53	of	of	ADP
ajst-1488	15	54	christmas	christmas	PROPN
ajst-1488	15	55	tree	tree	NOUN
ajst-1488	15	56	research	research	NOUN
ajst-1488	15	57	.	.	PUNCT
ajst-1488	16	1	2	2	X
ajst-1488	16	2	.	.	X
ajst-1488	16	3	materials	material	NOUN
ajst-1488	16	4	and	and	CCONJ
ajst-1488	16	5	methods	method	NOUN
ajst-1488	16	6	2.1	2.1	NUM
ajst-1488	16	7	.	.	PUNCT
ajst-1488	17	1	data	datum	NOUN
ajst-1488	17	2	sources	source	NOUN
ajst-1488	17	3	the	the	DET
ajst-1488	17	4	foreign	foreign	ADJ
ajst-1488	17	5	literature	literature	NOUN
ajst-1488	17	6	collected	collect	VERB
ajst-1488	17	7	in	in	ADP
ajst-1488	17	8	this	this	DET
ajst-1488	17	9	study	study	NOUN
ajst-1488	17	10	comes	come	VERB
ajst-1488	17	11	from	from	ADP
ajst-1488	17	12	wos	wos	PROPN
ajst-1488	17	13	.	.	PUNCT
ajst-1488	18	1	the	the	DET
ajst-1488	18	2	chinese	chinese	PROPN
ajst-1488	18	3	literature	literature	PROPN
ajst-1488	18	4	was	be	AUX
ajst-1488	18	5	from	from	ADP
ajst-1488	18	6	cnki	cnki	PROPN
ajst-1488	18	7	.	.	PUNCT
ajst-1488	19	1	the	the	DET
ajst-1488	19	2	subject	subject	ADJ
ajst-1488	19	3	search	search	NOUN
ajst-1488	19	4	was	be	AUX
ajst-1488	19	5	used	use	VERB
ajst-1488	19	6	to	to	PART
ajst-1488	19	7	search	search	VERB
ajst-1488	19	8	words	word	NOUN
ajst-1488	19	9	"	"	PUNCT
ajst-1488	19	10	christmas	christmas	PROPN
ajst-1488	19	11	tree	tree	NOUN
ajst-1488	19	12	"	"	PUNCT
ajst-1488	19	13	.	.	PUNCT
ajst-1488	20	1	the	the	DET
ajst-1488	20	2	literature	literature	NOUN
ajst-1488	20	3	retrieved	retrieve	VERB
ajst-1488	20	4	by	by	ADP
ajst-1488	20	5	december	december	PROPN
ajst-1488	20	6	30	30	NUM
ajst-1488	20	7	,	,	PUNCT
ajst-1488	20	8	2020	2020	NUM
ajst-1488	20	9	,	,	PUNCT
ajst-1488	20	10	was	be	AUX
ajst-1488	20	11	not	not	PART
ajst-1488	20	12	limited	limit	VERB
ajst-1488	20	13	in	in	ADP
ajst-1488	20	14	type	type	NOUN
ajst-1488	20	15	.	.	PUNCT
ajst-1488	21	1	a	a	DET
ajst-1488	21	2	total	total	NOUN
ajst-1488	21	3	of	of	ADP
ajst-1488	21	4	722	722	NUM
ajst-1488	21	5	articles	article	NOUN
ajst-1488	21	6	were	be	AUX
ajst-1488	21	7	retrieved	retrieve	VERB
ajst-1488	21	8	from	from	ADP
ajst-1488	21	9	wos	wos	NOUN
ajst-1488	21	10	and	and	CCONJ
ajst-1488	21	11	2286	2286	NUM
ajst-1488	21	12	articles	article	NOUN
ajst-1488	21	13	were	be	AUX
ajst-1488	21	14	retrieved	retrieve	VERB
ajst-1488	21	15	from	from	ADP
ajst-1488	21	16	cnki	cnki	PROPN
ajst-1488	21	17	.	.	PUNCT
ajst-1488	22	1	2.2	2.2	NUM
ajst-1488	22	2	.	.	PUNCT
ajst-1488	23	1	research	research	NOUN
ajst-1488	23	2	method	method	NOUN
ajst-1488	23	3	the	the	DET
ajst-1488	23	4	research	research	NOUN
ajst-1488	23	5	method	method	NOUN
ajst-1488	23	6	of	of	ADP
ajst-1488	23	7	this	this	DET
ajst-1488	23	8	paper	paper	NOUN
ajst-1488	23	9	is	be	AUX
ajst-1488	23	10	based	base	VERB
ajst-1488	23	11	on	on	ADP
ajst-1488	23	12	citespace	citespace	NOUN
ajst-1488	23	13	,	,	PUNCT
ajst-1488	23	14	a	a	DET
ajst-1488	23	15	software	software	NOUN
ajst-1488	23	16	for	for	ADP
ajst-1488	23	17	citation	citation	NOUN
ajst-1488	23	18	visualization	visualization	NOUN
ajst-1488	23	19	analysis	analysis	NOUN
ajst-1488	23	20	developed	develop	VERB
ajst-1488	23	21	by	by	ADP
ajst-1488	23	22	american	american	ADJ
ajst-1488	23	23	professor	professor	PROPN
ajst-1488	23	24	chaomei	chaomei	PROPN
ajst-1488	23	25	chen	chen	PROPN
ajst-1488	24	1	[	[	X
ajst-1488	24	2	5	5	NUM
ajst-1488	24	3	-	-	SYM
ajst-1488	24	4	6	6	NUM
ajst-1488	24	5	]	]	PUNCT
ajst-1488	24	6	,	,	PUNCT
ajst-1488	24	7	which	which	PRON
ajst-1488	24	8	focuses	focus	VERB
ajst-1488	24	9	on	on	ADP
ajst-1488	24	10	the	the	DET
ajst-1488	24	11	analysis	analysis	NOUN
ajst-1488	24	12	of	of	ADP
ajst-1488	24	13	potential	potential	ADJ
ajst-1488	24	14	knowledge	knowledge	NOUN
ajst-1488	24	15	contained	contain	VERB
ajst-1488	24	16	in	in	ADP
ajst-1488	24	17	scientific	scientific	ADJ
ajst-1488	24	18	literature	literature	NOUN
ajst-1488	24	19	,	,	PUNCT
ajst-1488	24	20	uses	use	VERB
ajst-1488	24	21	scientometrics	scientometric	NOUN
ajst-1488	24	22	and	and	CCONJ
ajst-1488	24	23	data	datum	NOUN
ajst-1488	24	24	visualization	visualization	NOUN
ajst-1488	24	25	methods	method	NOUN
ajst-1488	24	26	to	to	PART
ajst-1488	24	27	identify	identify	VERB
ajst-1488	24	28	it	it	PRON
ajst-1488	24	29	,	,	PUNCT
ajst-1488	24	30	and	and	CCONJ
ajst-1488	24	31	displays	display	VERB
ajst-1488	24	32	the	the	DET
ajst-1488	24	33	new	new	ADJ
ajst-1488	24	34	trends	trend	NOUN
ajst-1488	24	35	and	and	CCONJ
ajst-1488	24	36	dynamics	dynamic	NOUN
ajst-1488	24	37	of	of	ADP
ajst-1488	24	38	scientific	scientific	ADJ
ajst-1488	24	39	development	development	NOUN
ajst-1488	24	40	.	.	PUNCT
ajst-1488	25	1	this	this	DET
ajst-1488	25	2	study	study	NOUN
ajst-1488	25	3	is	be	AUX
ajst-1488	25	4	based	base	VERB
ajst-1488	25	5	on	on	ADP
ajst-1488	25	6	the	the	DET
ajst-1488	25	7	citations	citation	NOUN
ajst-1488	25	8	of	of	ADP
ajst-1488	25	9	wos	wos	NOUN
ajst-1488	25	10	and	and	CCONJ
ajst-1488	25	11	cnki	cnki	ADJ
ajst-1488	25	12	and	and	CCONJ
ajst-1488	25	13	uses	use	VERB
ajst-1488	25	14	version	version	NOUN
ajst-1488	25	15	5.7.r3	5.7.r3	CCONJ
ajst-1488	25	16	released	release	VERB
ajst-1488	25	17	on	on	ADP
ajst-1488	25	18	december	december	PROPN
ajst-1488	25	19	25	25	NUM
ajst-1488	25	20	,	,	PUNCT
ajst-1488	25	21	2020	2020	NUM
ajst-1488	25	22	,	,	PUNCT
ajst-1488	25	23	for	for	ADP
ajst-1488	25	24	research	research	NOUN
ajst-1488	25	25	and	and	CCONJ
ajst-1488	25	26	visual	visual	ADJ
ajst-1488	25	27	analysis	analysis	NOUN
ajst-1488	25	28	.	.	PUNCT
ajst-1488	26	1	firstly	firstly	ADV
ajst-1488	26	2	,	,	PUNCT
ajst-1488	26	3	the	the	DET
ajst-1488	26	4	collected	collect	VERB
ajst-1488	26	5	data	datum	NOUN
ajst-1488	26	6	were	be	AUX
ajst-1488	26	7	preprocessed	preprocesse	VERB
ajst-1488	26	8	,	,	PUNCT
ajst-1488	26	9	and	and	CCONJ
ajst-1488	26	10	9	9	NUM
ajst-1488	26	11	duplicated	duplicate	VERB
ajst-1488	26	12	articles	article	NOUN
ajst-1488	26	13	in	in	ADP
ajst-1488	26	14	cnki	cnki	ADJ
ajst-1488	26	15	citation	citation	NOUN
ajst-1488	26	16	were	be	AUX
ajst-1488	26	17	removed	remove	VERB
ajst-1488	26	18	from	from	ADP
ajst-1488	26	19	the	the	DET
ajst-1488	26	20	data	datum	NOUN
ajst-1488	26	21	reweighting	reweighte	VERB
ajst-1488	26	22	to	to	PART
ajst-1488	26	23	obtain	obtain	VERB
ajst-1488	26	24	2267	2267	NUM
ajst-1488	26	25	articles	article	NOUN
ajst-1488	26	26	.	.	PUNCT
ajst-1488	27	1	copy	copy	VERB
ajst-1488	27	2	the	the	DET
ajst-1488	27	3	data	datum	NOUN
ajst-1488	27	4	in	in	ADP
ajst-1488	27	5	the	the	DET
ajst-1488	27	6	pre	pre	ADJ
ajst-1488	27	7	-	-	ADJ
ajst-1488	27	8	processed	processed	ADJ
ajst-1488	27	9	"	"	PUNCT
ajst-1488	27	10	output	output	NOUN
ajst-1488	27	11	"	"	PUNCT
ajst-1488	27	12	to	to	ADP
ajst-1488	27	13	"	"	PUNCT
ajst-1488	27	14	data	datum	NOUN
ajst-1488	27	15	"	"	PUNCT
ajst-1488	27	16	,	,	PUNCT
ajst-1488	27	17	then	then	ADV
ajst-1488	27	18	create	create	VERB
ajst-1488	27	19	a	a	DET
ajst-1488	27	20	new	new	ADJ
ajst-1488	27	21	project	project	NOUN
ajst-1488	27	22	in	in	ADP
ajst-1488	27	23	citespace	citespace	NOUN
ajst-1488	27	24	and	and	CCONJ
ajst-1488	27	25	set	set	VERB
ajst-1488	27	26	time	time	NOUN
ajst-1488	27	27	slicing	slicing	NOUN
ajst-1488	27	28	,	,	PUNCT
ajst-1488	27	29	selection	selection	NOUN
ajst-1488	27	30	criteria	criterion	NOUN
ajst-1488	27	31	,	,	PUNCT
ajst-1488	27	32	links	link	NOUN
ajst-1488	27	33	,	,	PUNCT
ajst-1488	27	34	and	and	CCONJ
ajst-1488	27	35	pruning	prune	VERB
ajst-1488	27	36	.	.	PUNCT
ajst-1488	28	1	the	the	DET
ajst-1488	28	2	year	year	NOUN
ajst-1488	28	3	,	,	PUNCT
ajst-1488	28	4	country	country	NOUN
ajst-1488	28	5	/	/	SYM
ajst-1488	28	6	region	region	NOUN
ajst-1488	28	7	,	,	PUNCT
ajst-1488	28	8	institution	institution	NOUN
ajst-1488	28	9	,	,	PUNCT
ajst-1488	28	10	journal	journal	NOUN
ajst-1488	28	11	,	,	PUNCT
ajst-1488	28	12	and	and	CCONJ
ajst-1488	28	13	keywords	keyword	NOUN
ajst-1488	28	14	were	be	AUX
ajst-1488	28	15	sorted	sort	VERB
ajst-1488	28	16	out	out	ADP
ajst-1488	28	17	and	and	CCONJ
ajst-1488	28	18	analyzed	analyze	VERB
ajst-1488	28	19	.	.	PUNCT
ajst-1488	29	1	node	node	ADJ
ajst-1488	29	2	size	size	NOUN
ajst-1488	29	3	is	be	AUX
ajst-1488	29	4	proportional	proportional	ADJ
ajst-1488	29	5	to	to	ADP
ajst-1488	29	6	the	the	DET
ajst-1488	29	7	frequency	frequency	NOUN
ajst-1488	29	8	of	of	ADP
ajst-1488	29	9	node	node	ADJ
ajst-1488	29	10	type	type	NOUN
ajst-1488	29	11	content	content	NOUN
ajst-1488	29	12	.	.	PUNCT
ajst-1488	30	1	the	the	DET
ajst-1488	30	2	thickness	thickness	NOUN
ajst-1488	30	3	and	and	CCONJ
ajst-1488	30	4	quantity	quantity	NOUN
ajst-1488	30	5	of	of	ADP
ajst-1488	30	6	cables	cable	NOUN
ajst-1488	30	7	between	between	ADP
ajst-1488	30	8	nodes	node	NOUN
ajst-1488	30	9	represent	represent	VERB
ajst-1488	30	10	the	the	DET
ajst-1488	30	11	degree	degree	NOUN
ajst-1488	30	12	of	of	ADP
ajst-1488	30	13	connection	connection	NOUN
ajst-1488	30	14	between	between	ADP
ajst-1488	30	15	nodes	node	NOUN
ajst-1488	30	16	.	.	PUNCT
ajst-1488	31	1	the	the	PRON
ajst-1488	31	2	closer	close	ADV
ajst-1488	31	3	the	the	DET
ajst-1488	31	4	connection	connection	NOUN
ajst-1488	31	5	is	be	AUX
ajst-1488	31	6	,	,	PUNCT
ajst-1488	31	7	the	the	PRON
ajst-1488	31	8	thicker	thick	ADJ
ajst-1488	31	9	the	the	DET
ajst-1488	31	10	cable	cable	NOUN
ajst-1488	31	11	is	be	AUX
ajst-1488	31	12	.	.	PUNCT
ajst-1488	32	1	3	3	X
ajst-1488	32	2	.	.	X
ajst-1488	32	3	results	result	VERB
ajst-1488	32	4	3.1	3.1	NUM
ajst-1488	32	5	.	.	PUNCT
ajst-1488	32	6	annual	annual	ADJ
ajst-1488	32	7	analysis	analysis	NOUN
ajst-1488	32	8	of	of	ADP
ajst-1488	32	9	christmas	christmas	PROPN
ajst-1488	32	10	tree	tree	NOUN
ajst-1488	32	11	research	research	NOUN
ajst-1488	32	12	research	research	NOUN
ajst-1488	32	13	reports	report	NOUN
ajst-1488	32	14	related	relate	VERB
ajst-1488	32	15	to	to	ADP
ajst-1488	32	16	the	the	DET
ajst-1488	32	17	christmas	christmas	PROPN
ajst-1488	32	18	tree	tree	NOUN
ajst-1488	32	19	appeared	appear	VERB
ajst-1488	32	20	in	in	ADP
ajst-1488	32	21	foreign	foreign	ADJ
ajst-1488	32	22	countries	country	NOUN
ajst-1488	32	23	at	at	ADP
ajst-1488	32	24	the	the	DET
ajst-1488	32	25	beginning	beginning	NOUN
ajst-1488	32	26	of	of	ADP
ajst-1488	32	27	the	the	DET
ajst-1488	32	28	last	last	ADJ
ajst-1488	32	29	century	century	NOUN
ajst-1488	32	30	,	,	PUNCT
ajst-1488	32	31	and	and	CCONJ
ajst-1488	32	32	the	the	DET
ajst-1488	32	33	citation	citation	NOUN
ajst-1488	32	34	based	base	VERB
ajst-1488	32	35	on	on	ADP
ajst-1488	32	36	wos	wos	X
ajst-1488	32	37	can	can	AUX
ajst-1488	32	38	be	be	AUX
ajst-1488	32	39	traced	trace	VERB
ajst-1488	32	40	back	back	ADV
ajst-1488	32	41	to	to	ADP
ajst-1488	32	42	1949	1949	NUM
ajst-1488	32	43	.	.	PUNCT
ajst-1488	33	1	after	after	ADP
ajst-1488	33	2	1900	1900	NUM
ajst-1488	33	3	,	,	PUNCT
ajst-1488	33	4	the	the	DET
ajst-1488	33	5	research	research	NOUN
ajst-1488	33	6	literature	literature	NOUN
ajst-1488	33	7	in	in	ADP
ajst-1488	33	8	this	this	DET
ajst-1488	33	9	field	field	NOUN
ajst-1488	33	10	began	begin	VERB
ajst-1488	33	11	to	to	PART
ajst-1488	33	12	increase	increase	VERB
ajst-1488	33	13	,	,	PUNCT
ajst-1488	33	14	especially	especially	ADV
ajst-1488	33	15	in	in	ADP
ajst-1488	33	16	the	the	DET
ajst-1488	33	17	recent	recent	ADJ
ajst-1488	33	18	10	10	NUM
ajst-1488	33	19	years	year	NOUN
ajst-1488	33	20	,	,	PUNCT
ajst-1488	33	21	the	the	DET
ajst-1488	33	22	number	number	NOUN
ajst-1488	33	23	of	of	ADP
ajst-1488	33	24	publications	publication	NOUN
ajst-1488	33	25	increased	increase	VERB
ajst-1488	33	26	significantly	significantly	ADV
ajst-1488	33	27	[	[	X
ajst-1488	33	28	7	7	NUM
ajst-1488	33	29	]	]	PUNCT
ajst-1488	33	30	.	.	PUNCT
ajst-1488	34	1	the	the	DET
ajst-1488	34	2	annually	annually	ADV
ajst-1488	34	3	published	publish	VERB
ajst-1488	34	4	quantity	quantity	NOUN
ajst-1488	34	5	of	of	ADP
ajst-1488	34	6	research	research	NOUN
ajst-1488	34	7	related	relate	VERB
ajst-1488	34	8	to	to	ADP
ajst-1488	34	9	the	the	DET
ajst-1488	34	10	christmas	christmas	PROPN
ajst-1488	34	11	tree	tree	NOUN
ajst-1488	34	12	is	be	AUX
ajst-1488	34	13	shown	show	VERB
ajst-1488	34	14	in	in	ADP
ajst-1488	34	15	fig	fig	NOUN
ajst-1488	34	16	.	.	PUNCT
ajst-1488	35	1	1	1	NUM
ajst-1488	35	2	and	and	CCONJ
ajst-1488	35	3	fig	fig	NOUN
ajst-1488	35	4	.	.	PUNCT
ajst-1488	36	1	2	2	NUM
ajst-1488	36	2	.	.	NOUN
ajst-1488	36	3	3.2	3.2	NUM
ajst-1488	36	4	.	.	PUNCT
ajst-1488	37	1	country	country	NOUN
ajst-1488	37	2	/	/	SYM
ajst-1488	37	3	region	region	NOUN
ajst-1488	37	4	analysis	analysis	NOUN
ajst-1488	37	5	of	of	ADP
ajst-1488	37	6	christmas	christmas	PROPN
ajst-1488	37	7	tree	tree	PROPN
ajst-1488	37	8	research	research	PROPN
ajst-1488	37	9	national	national	PROPN
ajst-1488	37	10	co	co	NOUN
ajst-1488	37	11	-	-	NOUN
ajst-1488	37	12	occurrence	occurrence	ADJ
ajst-1488	37	13	analysis	analysis	NOUN
ajst-1488	37	14	was	be	AUX
ajst-1488	37	15	carried	carry	VERB
ajst-1488	37	16	out	out	ADP
ajst-1488	37	17	by	by	ADP
ajst-1488	37	18	citespace	citespace	NOUN
ajst-1488	37	19	software	software	NOUN
ajst-1488	37	20	,	,	PUNCT
ajst-1488	37	21	and	and	CCONJ
ajst-1488	37	22	relevant	relevant	ADJ
ajst-1488	37	23	parameters	parameter	NOUN
ajst-1488	37	24	were	be	AUX
ajst-1488	37	25	set	set	VERB
ajst-1488	37	26	as	as	SCONJ
ajst-1488	37	27	follows	follow	VERB
ajst-1488	37	28	:	:	PUNCT
ajst-1488	37	29	time	time	NOUN
ajst-1488	37	30	slicing	slicing	NOUN
ajst-1488	37	31	:	:	PUNCT
ajst-1488	37	32	1990	1990	NUM
ajst-1488	37	33	-	-	SYM
ajst-1488	37	34	2020	2020	NUM
ajst-1488	37	35	;	;	PUNCT
ajst-1488	37	36	years	year	NOUN
ajst-1488	37	37	per	per	ADP
ajst-1488	37	38	slice	slice	NOUN
ajst-1488	37	39	:	:	PUNCT
ajst-1488	37	40	1	1	NUM
ajst-1488	37	41	;	;	PUNCT
ajst-1488	37	42	node	node	ADJ
ajst-1488	37	43	types	type	NOUN
ajst-1488	37	44	:	:	PUNCT
ajst-1488	37	45	country	country	NOUN
ajst-1488	37	46	;	;	PUNCT
ajst-1488	37	47	selection	selection	NOUN
ajst-1488	37	48	criteria	criterion	NOUN
ajst-1488	37	49	:	:	PUNCT
ajst-1488	37	50	top	top	NOUN
ajst-1488	37	51	30	30	NUM
ajst-1488	37	52	;	;	PUNCT
ajst-1488	37	53	links	link	NOUN
ajst-1488	37	54	strength	strength	NOUN
ajst-1488	37	55	:	:	PUNCT
ajst-1488	37	56	cosine	cosine	NOUN
ajst-1488	37	57	.	.	PUNCT
ajst-1488	38	1	the	the	DET
ajst-1488	38	2	map	map	NOUN
ajst-1488	38	3	of	of	ADP
ajst-1488	38	4	the	the	DET
ajst-1488	38	5	national	national	ADJ
ajst-1488	38	6	cooperation	cooperation	NOUN
ajst-1488	38	7	network	network	NOUN
ajst-1488	38	8	is	be	AUX
ajst-1488	38	9	shown	show	VERB
ajst-1488	38	10	in	in	ADP
ajst-1488	38	11	fig	fig	NOUN
ajst-1488	38	12	.	.	PUNCT
ajst-1488	39	1	3	3	X
ajst-1488	39	2	.	.	PUNCT
ajst-1488	39	3	according	accord	VERB
ajst-1488	39	4	to	to	ADP
ajst-1488	39	5	the	the	DET
ajst-1488	39	6	parameters	parameter	NOUN
ajst-1488	39	7	in	in	ADP
ajst-1488	39	8	the	the	DET
ajst-1488	39	9	upper	upper	ADJ
ajst-1488	39	10	left	left	NOUN
ajst-1488	39	11	corner	corner	NOUN
ajst-1488	39	12	,	,	PUNCT
ajst-1488	39	13	752	752	NUM
ajst-1488	39	14	countries	country	NOUN
ajst-1488	39	15	/	/	SYM
ajst-1488	39	16	regions	region	NOUN
ajst-1488	39	17	in	in	ADP
ajst-1488	39	18	the	the	DET
ajst-1488	39	19	world	world	NOUN
ajst-1488	39	20	have	have	AUX
ajst-1488	39	21	published	publish	VERB
ajst-1488	39	22	literature	literature	NOUN
ajst-1488	39	23	related	relate	VERB
ajst-1488	39	24	to	to	ADP
ajst-1488	39	25	christmas	christmas	NOUN
ajst-1488	39	26	trees	tree	NOUN
ajst-1488	39	27	,	,	PUNCT
ajst-1488	39	28	and	and	CCONJ
ajst-1488	39	29	there	there	PRON
ajst-1488	39	30	are	be	VERB
ajst-1488	39	31	822	822	NUM
ajst-1488	39	32	cooperative	cooperative	ADJ
ajst-1488	39	33	relationships	relationship	NOUN
ajst-1488	39	34	among	among	ADP
ajst-1488	39	35	them	they	PRON
ajst-1488	39	36	.	.	PUNCT
ajst-1488	40	1	the	the	PRON
ajst-1488	40	2	larger	large	ADJ
ajst-1488	40	3	the	the	DET
ajst-1488	40	4	node	node	NOUN
ajst-1488	40	5	in	in	ADP
ajst-1488	40	6	the	the	DET
ajst-1488	40	7	figure	figure	NOUN
ajst-1488	40	8	,	,	PUNCT
ajst-1488	40	9	the	the	DET
ajst-1488	40	10	more	more	ADJ
ajst-1488	40	11	articles	article	NOUN
ajst-1488	40	12	are	be	AUX
ajst-1488	40	13	published	publish	VERB
ajst-1488	40	14	by	by	ADP
ajst-1488	40	15	the	the	DET
ajst-1488	40	16	country	country	NOUN
ajst-1488	40	17	/	/	SYM
ajst-1488	40	18	region	region	NOUN
ajst-1488	40	19	.	.	PUNCT
ajst-1488	41	1	it	it	PRON
ajst-1488	41	2	can	can	AUX
ajst-1488	41	3	be	be	AUX
ajst-1488	41	4	seen	see	VERB
ajst-1488	41	5	that	that	SCONJ
ajst-1488	41	6	the	the	DET
ajst-1488	41	7	united	united	PROPN
ajst-1488	41	8	states	states	PROPN
ajst-1488	41	9	has	have	VERB
ajst-1488	41	10	the	the	DET
ajst-1488	41	11	largest	large	ADJ
ajst-1488	41	12	number	number	NOUN
ajst-1488	41	13	of	of	ADP
ajst-1488	41	14	publications	publication	NOUN
ajst-1488	41	15	in	in	ADP
ajst-1488	41	16	this	this	DET
ajst-1488	41	17	field	field	NOUN
ajst-1488	41	18	,	,	PUNCT
ajst-1488	41	19	with	with	ADP
ajst-1488	41	20	a	a	DET
ajst-1488	41	21	total	total	NOUN
ajst-1488	41	22	of	of	ADP
ajst-1488	41	23	198	198	NUM
ajst-1488	41	24	articles	article	NOUN
ajst-1488	41	25	,	,	PUNCT
ajst-1488	41	26	followed	follow	VERB
ajst-1488	41	27	by	by	ADP
ajst-1488	41	28	the	the	DET
ajst-1488	41	29	following	follow	VERB
ajst-1488	41	30	countries	country	NOUN
ajst-1488	41	31	/	/	SYM
ajst-1488	41	32	regions	region	NOUN
ajst-1488	41	33	:	:	PUNCT
ajst-1488	41	34	denmark	denmark	NOUN
ajst-1488	41	35	(	(	PUNCT
ajst-1488	41	36	87	87	NUM
ajst-1488	41	37	articles	article	NOUN
ajst-1488	41	38	)	)	PUNCT
ajst-1488	41	39	,	,	PUNCT
ajst-1488	41	40	china	china	PROPN
ajst-1488	41	41	(	(	PUNCT
ajst-1488	41	42	24	24	NUM
ajst-1488	41	43	articles	article	NOUN
ajst-1488	41	44	)	)	PUNCT
ajst-1488	41	45	,	,	PUNCT
ajst-1488	41	46	canada	canada	PROPN
ajst-1488	41	47	(	(	PUNCT
ajst-1488	41	48	19	19	NUM
ajst-1488	41	49	articles	article	NOUN
ajst-1488	41	50	)	)	PUNCT
ajst-1488	41	51	,	,	PUNCT
ajst-1488	41	52	france	france	PROPN
ajst-1488	41	53	(	(	PUNCT
ajst-1488	41	54	14	14	NUM
ajst-1488	41	55	articles	article	NOUN
ajst-1488	41	56	)	)	PUNCT
ajst-1488	41	57	,	,	PUNCT
ajst-1488	41	58	germany	germany	PROPN
ajst-1488	41	59	(	(	PUNCT
ajst-1488	41	60	13	13	NUM
ajst-1488	41	61	articles	article	NOUN
ajst-1488	41	62	)	)	PUNCT
ajst-1488	41	63	,	,	PUNCT
ajst-1488	41	64	india	india	PROPN
ajst-1488	41	65	(	(	PUNCT
ajst-1488	41	66	10	10	NUM
ajst-1488	41	67	articles	article	NOUN
ajst-1488	41	68	)	)	PUNCT
ajst-1488	41	69	,	,	PUNCT
ajst-1488	41	70	norway	norway	PROPN
ajst-1488	41	71	(	(	PUNCT
ajst-1488	41	72	10	10	NUM
ajst-1488	41	73	articles	article	NOUN
ajst-1488	41	74	)	)	PUNCT
ajst-1488	41	75	,	,	PUNCT
ajst-1488	41	76	australia	australia	PROPN
ajst-1488	41	77	(	(	PUNCT
ajst-1488	41	78	9	9	NUM
ajst-1488	41	79	articles	article	NOUN
ajst-1488	41	80	)	)	PUNCT
ajst-1488	41	81	.	.	PUNCT
ajst-1488	42	1	46	46	NUM
ajst-1488	42	2	figure	figure	NOUN
ajst-1488	42	3	1	1	NUM
ajst-1488	42	4	.	.	PUNCT
ajst-1488	42	5	annual	annual	ADJ
ajst-1488	42	6	distribution	distribution	NOUN
ajst-1488	42	7	of	of	ADP
ajst-1488	42	8	wos	wos	X
ajst-1488	42	9	publication	publication	NOUN
ajst-1488	42	10	volume	volume	NOUN
ajst-1488	42	11	figure	figure	NOUN
ajst-1488	42	12	2	2	NUM
ajst-1488	42	13	.	.	PUNCT
ajst-1488	42	14	annual	annual	ADJ
ajst-1488	42	15	distribution	distribution	NOUN
ajst-1488	42	16	of	of	ADP
ajst-1488	42	17	cnki	cnki	ADJ
ajst-1488	42	18	publication	publication	NOUN
ajst-1488	42	19	volume	volume	NOUN
ajst-1488	42	20	figure	figure	NOUN
ajst-1488	42	21	3	3	NUM
ajst-1488	42	22	.	.	PUNCT
ajst-1488	42	23	national	national	ADJ
ajst-1488	42	24	cooperation	cooperation	NOUN
ajst-1488	42	25	network	network	NOUN
ajst-1488	42	26	map	map	NOUN
ajst-1488	42	27	of	of	ADP
ajst-1488	42	28	christmas	christmas	PROPN
ajst-1488	42	29	trees	tree	NOUN
ajst-1488	42	30	related	relate	VERB
ajst-1488	42	31	research	research	NOUN
ajst-1488	42	32	3.3	3.3	NUM
ajst-1488	42	33	.	.	PUNCT
ajst-1488	43	1	institutional	institutional	ADJ
ajst-1488	43	2	analysis	analysis	NOUN
ajst-1488	43	3	of	of	ADP
ajst-1488	43	4	christmastree	christmastree	PROPN
ajst-1488	43	5	research	research	PROPN
ajst-1488	43	6	citespace	citespace	NOUN
ajst-1488	43	7	software	software	NOUN
ajst-1488	43	8	was	be	AUX
ajst-1488	43	9	used	use	VERB
ajst-1488	43	10	for	for	ADP
ajst-1488	43	11	institutional	institutional	ADJ
ajst-1488	43	12	cooccurrence	cooccurrence	NOUN
ajst-1488	43	13	analysis	analysis	NOUN
ajst-1488	43	14	,	,	PUNCT
ajst-1488	43	15	and	and	CCONJ
ajst-1488	43	16	the	the	DET
ajst-1488	43	17	relevant	relevant	ADJ
ajst-1488	43	18	parameters	parameter	NOUN
ajst-1488	43	19	were	be	AUX
ajst-1488	43	20	set	set	VERB
ajst-1488	43	21	as	as	SCONJ
ajst-1488	43	22	follows	follow	VERB
ajst-1488	43	23	:	:	PUNCT
ajst-1488	43	24	time	time	NOUN
ajst-1488	43	25	slicing	slicing	NOUN
ajst-1488	43	26	:	:	PUNCT
ajst-1488	43	27	1990	1990	NUM
ajst-1488	43	28	-	-	SYM
ajst-1488	43	29	2020	2020	NUM
ajst-1488	43	30	;	;	PUNCT
ajst-1488	43	31	years	year	NOUN
ajst-1488	43	32	per	per	ADP
ajst-1488	43	33	slice	slice	NOUN
ajst-1488	43	34	:	:	PUNCT
ajst-1488	43	35	1	1	NUM
ajst-1488	43	36	;	;	PUNCT
ajst-1488	43	37	node	node	ADJ
ajst-1488	43	38	types	type	NOUN
ajst-1488	43	39	:	:	PUNCT
ajst-1488	43	40	institution	institution	NOUN
ajst-1488	43	41	;	;	PUNCT
ajst-1488	43	42	selection	selection	NOUN
ajst-1488	43	43	criteria	criterion	NOUN
ajst-1488	43	44	:	:	PUNCT
ajst-1488	43	45	top	top	NOUN
ajst-1488	43	46	50	50	NUM
ajst-1488	43	47	;	;	PUNCT
ajst-1488	43	48	links	link	NOUN
ajst-1488	43	49	strength	strength	NOUN
ajst-1488	43	50	:	:	PUNCT
ajst-1488	43	51	cosine	cosine	NOUN
ajst-1488	43	52	.	.	PUNCT
ajst-1488	44	1	the	the	DET
ajst-1488	44	2	cooperation	cooperation	NOUN
ajst-1488	44	3	network	network	NOUN
ajst-1488	44	4	map	map	NOUN
ajst-1488	44	5	of	of	ADP
ajst-1488	44	6	institutions	institution	NOUN
ajst-1488	44	7	is	be	AUX
ajst-1488	44	8	shown	show	VERB
ajst-1488	44	9	in	in	ADP
ajst-1488	44	10	fig	fig	NOUN
ajst-1488	44	11	.	.	PUNCT
ajst-1488	45	1	4	4	NUM
ajst-1488	45	2	.	.	PUNCT
ajst-1488	45	3	according	accord	VERB
ajst-1488	45	4	to	to	ADP
ajst-1488	45	5	the	the	DET
ajst-1488	45	6	parameters	parameter	NOUN
ajst-1488	45	7	in	in	ADP
ajst-1488	45	8	the	the	DET
ajst-1488	45	9	upper	upper	ADJ
ajst-1488	45	10	left	left	NOUN
ajst-1488	45	11	corner	corner	NOUN
ajst-1488	45	12	,	,	PUNCT
ajst-1488	45	13	a	a	DET
ajst-1488	45	14	total	total	NOUN
ajst-1488	45	15	of	of	ADP
ajst-1488	45	16	1204	1204	NUM
ajst-1488	45	17	institutions	institution	NOUN
ajst-1488	45	18	around	around	ADP
ajst-1488	45	19	the	the	DET
ajst-1488	45	20	world	world	NOUN
ajst-1488	45	21	have	have	AUX
ajst-1488	45	22	published	publish	VERB
ajst-1488	45	23	47	47	NUM
ajst-1488	45	24	literature	literature	NOUN
ajst-1488	45	25	related	relate	VERB
ajst-1488	45	26	to	to	ADP
ajst-1488	45	27	the	the	DET
ajst-1488	45	28	christmas	christmas	PROPN
ajst-1488	45	29	tree	tree	NOUN
ajst-1488	45	30	,	,	PUNCT
ajst-1488	45	31	and	and	CCONJ
ajst-1488	45	32	there	there	PRON
ajst-1488	45	33	are	be	VERB
ajst-1488	45	34	1140	1140	NUM
ajst-1488	45	35	cooperative	cooperative	ADJ
ajst-1488	45	36	relationships	relationship	NOUN
ajst-1488	45	37	among	among	ADP
ajst-1488	45	38	them	they	PRON
ajst-1488	45	39	.	.	PUNCT
ajst-1488	46	1	according	accord	VERB
ajst-1488	46	2	to	to	ADP
ajst-1488	46	3	the	the	DET
ajst-1488	46	4	distribution	distribution	NOUN
ajst-1488	46	5	analysis	analysis	NOUN
ajst-1488	46	6	of	of	ADP
ajst-1488	46	7	countries	country	NOUN
ajst-1488	46	8	/	/	SYM
ajst-1488	46	9	regions	region	NOUN
ajst-1488	46	10	,	,	PUNCT
ajst-1488	46	11	the	the	PRON
ajst-1488	46	12	larger	large	ADJ
ajst-1488	46	13	the	the	DET
ajst-1488	46	14	node	node	NOUN
ajst-1488	46	15	in	in	ADP
ajst-1488	46	16	the	the	DET
ajst-1488	46	17	figure	figure	NOUN
ajst-1488	46	18	,	,	PUNCT
ajst-1488	46	19	the	the	DET
ajst-1488	46	20	more	more	ADJ
ajst-1488	46	21	articles	article	NOUN
ajst-1488	46	22	published	publish	VERB
ajst-1488	46	23	by	by	ADP
ajst-1488	46	24	the	the	DET
ajst-1488	46	25	institution	institution	NOUN
ajst-1488	46	26	.	.	PUNCT
ajst-1488	47	1	the	the	DET
ajst-1488	47	2	top	top	ADJ
ajst-1488	47	3	10	10	NUM
ajst-1488	47	4	institutions	institution	NOUN
ajst-1488	47	5	by	by	ADP
ajst-1488	47	6	the	the	DET
ajst-1488	47	7	number	number	NOUN
ajst-1488	47	8	of	of	ADP
ajst-1488	47	9	publications	publication	NOUN
ajst-1488	47	10	are	be	AUX
ajst-1488	47	11	offshore	offshore	ADJ
ajst-1488	47	12	oil	oil	NOUN
ajst-1488	47	13	engineering	engineering	NOUN
ajst-1488	47	14	co.ltd	co.ltd	PROPN
ajst-1488	47	15	.	.	PUNCT
ajst-1488	48	1	(	(	PUNCT
ajst-1488	48	2	44	44	NUM
ajst-1488	48	3	articles	article	NOUN
ajst-1488	48	4	)	)	PUNCT
ajst-1488	48	5	,	,	PUNCT
ajst-1488	48	6	baoji	baoji	PROPN
ajst-1488	48	7	oilfield	oilfield	NOUN
ajst-1488	48	8	machinery	machinery	NOUN
ajst-1488	48	9	company	company	NOUN
ajst-1488	48	10	[	[	X
ajst-1488	48	11	8	8	NUM
ajst-1488	48	12	]	]	X
ajst-1488	48	13	(	(	PUNCT
ajst-1488	48	14	39	39	NUM
ajst-1488	48	15	articles	article	NOUN
ajst-1488	48	16	)	)	PUNCT
ajst-1488	48	17	,	,	PUNCT
ajst-1488	48	18	offshore	offshore	ADJ
ajst-1488	48	19	oil	oil	NOUN
ajst-1488	48	20	and	and	CCONJ
ajst-1488	48	21	gas	gas	NOUN
ajst-1488	48	22	research	research	NOUN
ajst-1488	48	23	center	center	NOUN
ajst-1488	48	24	of	of	ADP
ajst-1488	48	25	china	china	PROPN
ajst-1488	48	26	university	university	PROPN
ajst-1488	48	27	of	of	ADP
ajst-1488	48	28	petroleum	petroleum	NOUN
ajst-1488	48	29	,	,	PUNCT
ajst-1488	48	30	beijing	beijing	PROPN
ajst-1488	49	1	[	[	X
ajst-1488	49	2	9	9	NUM
ajst-1488	49	3	]	]	X
ajst-1488	49	4	(	(	PUNCT
ajst-1488	49	5	37	37	NUM
ajst-1488	49	6	articles	article	NOUN
ajst-1488	49	7	)	)	PUNCT
ajst-1488	49	8	,	,	PUNCT
ajst-1488	49	9	department	department	NOUN
ajst-1488	49	10	of	of	ADP
ajst-1488	49	11	forestry	forestry	NOUN
ajst-1488	49	12	(	(	PUNCT
ajst-1488	49	13	37	37	NUM
ajst-1488	49	14	articles	article	NOUN
ajst-1488	49	15	)	)	PUNCT
ajst-1488	49	16	,	,	PUNCT
ajst-1488	49	17	danish	danish	ADJ
ajst-1488	49	18	centre	centre	NOUN
ajst-1488	49	19	for	for	ADP
ajst-1488	49	20	forest	forest	NOUN
ajst-1488	49	21	(	(	PUNCT
ajst-1488	49	22	36	36	NUM
ajst-1488	49	23	articles	article	NOUN
ajst-1488	49	24	)	)	PUNCT
ajst-1488	49	25	,	,	PUNCT
ajst-1488	49	26	department	department	NOUN
ajst-1488	49	27	of	of	ADP
ajst-1488	49	28	botany	botany	NOUN
ajst-1488	49	29	(	(	PUNCT
ajst-1488	49	30	34	34	NUM
ajst-1488	49	31	articles	article	NOUN
ajst-1488	49	32	)	)	PUNCT
ajst-1488	49	33	,	,	PUNCT
ajst-1488	49	34	chuanzhong	chuanzhong	VERB
ajst-1488	49	35	oil	oil	NOUN
ajst-1488	49	36	&	&	CCONJ
ajst-1488	49	37	gas	gas	NOUN
ajst-1488	49	38	mines	mine	NOUN
ajst-1488	49	39	of	of	ADP
ajst-1488	49	40	southwest	southwest	ADJ
ajst-1488	49	41	oil	oil	NOUN
ajst-1488	49	42	and	and	CCONJ
ajst-1488	49	43	gas	gas	NOUN
ajst-1488	49	44	field	field	NOUN
ajst-1488	49	45	company	company	NOUN
ajst-1488	49	46	(	(	PUNCT
ajst-1488	49	47	32	32	NUM
ajst-1488	49	48	articles	article	NOUN
ajst-1488	49	49	)	)	PUNCT
ajst-1488	49	50	,	,	PUNCT
ajst-1488	49	51	washington	washington	PROPN
ajst-1488	49	52	state	state	PROPN
ajst-1488	49	53	university	university	PROPN
ajst-1488	49	54	research	research	NOUN
ajst-1488	49	55	and	and	CCONJ
ajst-1488	49	56	extension	extension	NOUN
ajst-1488	49	57	center	center	NOUN
ajst-1488	49	58	(	(	PUNCT
ajst-1488	49	59	32	32	NUM
ajst-1488	49	60	papers	paper	NOUN
ajst-1488	49	61	)	)	PUNCT
ajst-1488	49	62	,	,	PUNCT
ajst-1488	49	63	school	school	NOUN
ajst-1488	49	64	of	of	ADP
ajst-1488	49	65	science	science	NOUN
ajst-1488	49	66	,	,	PUNCT
ajst-1488	49	67	beijing	beijing	PROPN
ajst-1488	49	68	jiaotong	jiaotong	PROPN
ajst-1488	49	69	university	university	PROPN
ajst-1488	49	70	(	(	PUNCT
ajst-1488	49	71	32	32	NUM
ajst-1488	49	72	papers	paper	NOUN
ajst-1488	49	73	)	)	PUNCT
ajst-1488	49	74	,	,	PUNCT
ajst-1488	49	75	innotest	innotest	ADJ
ajst-1488	49	76	company	company	NOUN
ajst-1488	49	77	(	(	PUNCT
ajst-1488	49	78	32	32	NUM
ajst-1488	49	79	papers	paper	NOUN
ajst-1488	49	80	)	)	PUNCT
ajst-1488	49	81	.	.	PUNCT
ajst-1488	50	1	through	through	ADP
ajst-1488	50	2	these	these	DET
ajst-1488	50	3	data	datum	NOUN
ajst-1488	50	4	,	,	PUNCT
ajst-1488	50	5	we	we	PRON
ajst-1488	50	6	can	can	AUX
ajst-1488	50	7	preliminarily	preliminarily	ADV
ajst-1488	50	8	infer	infer	VERB
ajst-1488	50	9	that	that	SCONJ
ajst-1488	50	10	the	the	DET
ajst-1488	50	11	school	school	NOUN
ajst-1488	50	12	of	of	ADP
ajst-1488	50	13	science	science	NOUN
ajst-1488	50	14	of	of	ADP
ajst-1488	50	15	beijing	beijing	PROPN
ajst-1488	50	16	jiaotong	jiaotong	PROPN
ajst-1488	50	17	university	university	PROPN
ajst-1488	50	18	has	have	AUX
ajst-1488	50	19	made	make	VERB
ajst-1488	50	20	some	some	DET
ajst-1488	50	21	achievements	achievement	NOUN
ajst-1488	50	22	in	in	ADP
ajst-1488	50	23	the	the	DET
ajst-1488	50	24	research	research	NOUN
ajst-1488	50	25	of	of	ADP
ajst-1488	50	26	christmas	christmas	PROPN
ajst-1488	50	27	trees	tree	NOUN
ajst-1488	51	1	[	[	X
ajst-1488	51	2	10	10	NUM
ajst-1488	51	3	]	]	PUNCT
ajst-1488	51	4	.	.	PUNCT
ajst-1488	52	1	in	in	ADP
ajst-1488	52	2	addition	addition	NOUN
ajst-1488	52	3	,	,	PUNCT
ajst-1488	52	4	you	you	PRON
ajst-1488	52	5	can	can	AUX
ajst-1488	52	6	see	see	VERB
ajst-1488	52	7	the	the	DET
ajst-1488	52	8	close	close	ADJ
ajst-1488	52	9	cooperation	cooperation	NOUN
ajst-1488	52	10	between	between	ADP
ajst-1488	52	11	research	research	NOUN
ajst-1488	52	12	institutes	institute	NOUN
ajst-1488	52	13	and	and	CCONJ
ajst-1488	52	14	universities	university	NOUN
ajst-1488	52	15	through	through	ADP
ajst-1488	52	16	the	the	DET
ajst-1488	52	17	lines	line	NOUN
ajst-1488	52	18	in	in	ADP
ajst-1488	52	19	the	the	DET
ajst-1488	52	20	figure	figure	NOUN
ajst-1488	52	21	.	.	PUNCT
ajst-1488	53	1	figure	figure	VERB
ajst-1488	53	2	4	4	NUM
ajst-1488	53	3	.	.	PUNCT
ajst-1488	54	1	institutions	institution	NOUN
ajst-1488	54	2	cooperation	cooperation	NOUN
ajst-1488	54	3	network	network	NOUN
ajst-1488	54	4	map	map	NOUN
ajst-1488	54	5	of	of	ADP
ajst-1488	54	6	christmas	christmas	PROPN
ajst-1488	54	7	trees	tree	NOUN
ajst-1488	54	8	related	relate	VERB
ajst-1488	54	9	research	research	NOUN
ajst-1488	54	10	3.4	3.4	NUM
ajst-1488	54	11	.	.	PUNCT
ajst-1488	55	1	journal	journal	NOUN
ajst-1488	55	2	analysis	analysis	NOUN
ajst-1488	55	3	of	of	ADP
ajst-1488	55	4	christmas	christmas	PROPN
ajst-1488	55	5	tree	tree	NOUN
ajst-1488	55	6	research	research	VERB
ajst-1488	55	7	a	a	DET
ajst-1488	55	8	total	total	NOUN
ajst-1488	55	9	of	of	ADP
ajst-1488	55	10	722	722	NUM
ajst-1488	55	11	wos	wos	X
ajst-1488	55	12	articles	article	NOUN
ajst-1488	55	13	were	be	AUX
ajst-1488	55	14	distributed	distribute	VERB
ajst-1488	55	15	in	in	ADP
ajst-1488	55	16	144	144	NUM
ajst-1488	55	17	journals	journal	NOUN
ajst-1488	55	18	.	.	PUNCT
ajst-1488	56	1	the	the	DET
ajst-1488	56	2	top	top	ADJ
ajst-1488	56	3	three	three	NUM
ajst-1488	56	4	publications	publication	NOUN
ajst-1488	56	5	were	be	AUX
ajst-1488	56	6	scandinavian	scandinavian	ADJ
ajst-1488	56	7	journal	journal	NOUN
ajst-1488	56	8	of	of	ADP
ajst-1488	56	9	forest	forest	PROPN
ajst-1488	56	10	research	research	NOUN
ajst-1488	56	11	(	(	PUNCT
ajst-1488	56	12	21	21	NUM
ajst-1488	56	13	articles	article	NOUN
ajst-1488	56	14	,	,	PUNCT
ajst-1488	56	15	accounting	account	VERB
ajst-1488	56	16	for	for	ADP
ajst-1488	56	17	2.909	2.909	NUM
ajst-1488	56	18	%	%	NOUN
ajst-1488	56	19	)	)	PUNCT
ajst-1488	56	20	and	and	CCONJ
ajst-1488	56	21	hortscience	hortscience	NOUN
ajst-1488	56	22	(	(	PUNCT
ajst-1488	56	23	19	19	NUM
ajst-1488	56	24	articles	article	NOUN
ajst-1488	56	25	,	,	PUNCT
ajst-1488	56	26	accounting	account	VERB
ajst-1488	56	27	for	for	ADP
ajst-1488	56	28	2.909	2.909	NUM
ajst-1488	56	29	%	%	NOUN
ajst-1488	56	30	)	)	PUNCT
ajst-1488	56	31	.	.	PUNCT
ajst-1488	57	1	(	(	PUNCT
ajst-1488	57	2	17	17	NUM
ajst-1488	57	3	articles	article	NOUN
ajst-1488	57	4	,	,	PUNCT
ajst-1488	57	5	2.355	2.355	NUM
ajst-1488	57	6	%	%	NOUN
ajst-1488	57	7	)	)	PUNCT
ajst-1488	57	8	.	.	PUNCT
ajst-1488	58	1	china	china	PROPN
ajst-1488	58	2	petroleum	petroleum	PROPN
ajst-1488	58	3	machinery	machinery	NOUN
ajst-1488	58	4	[	[	X
ajst-1488	58	5	11	11	NUM
ajst-1488	58	6	]	]	X
ajst-1488	58	7	(	(	PUNCT
ajst-1488	58	8	75	75	NUM
ajst-1488	58	9	articles	article	NOUN
ajst-1488	58	10	,	,	PUNCT
ajst-1488	58	11	10.01	10.01	NUM
ajst-1488	58	12	%	%	NOUN
ajst-1488	58	13	)	)	PUNCT
ajst-1488	58	14	was	be	AUX
ajst-1488	58	15	the	the	DET
ajst-1488	58	16	journal	journal	NOUN
ajst-1488	58	17	with	with	ADP
ajst-1488	58	18	the	the	DET
ajst-1488	58	19	largest	large	ADJ
ajst-1488	58	20	source	source	NOUN
ajst-1488	58	21	of	of	ADP
ajst-1488	58	22	cnki	cnki	ADJ
ajst-1488	58	23	literature	literature	NOUN
ajst-1488	58	24	,	,	PUNCT
ajst-1488	58	25	and	and	CCONJ
ajst-1488	58	26	the	the	DET
ajst-1488	58	27	top	top	ADJ
ajst-1488	58	28	10	10	NUM
ajst-1488	58	29	journals	journal	NOUN
ajst-1488	58	30	and	and	CCONJ
ajst-1488	58	31	sources	source	NOUN
ajst-1488	58	32	are	be	AUX
ajst-1488	58	33	shown	show	VERB
ajst-1488	58	34	in	in	ADP
ajst-1488	58	35	table	table	NOUN
ajst-1488	58	36	1	1	NUM
ajst-1488	58	37	.	.	PUNCT
ajst-1488	58	38	table	table	NOUN
ajst-1488	58	39	1	1	NUM
ajst-1488	58	40	.	.	PUNCT
ajst-1488	58	41	comparison	comparison	NOUN
ajst-1488	58	42	of	of	ADP
ajst-1488	58	43	authentication	authentication	NOUN
ajst-1488	58	44	performance	performance	NOUN
ajst-1488	58	45	with	with	ADP
ajst-1488	58	46	existing	exist	VERB
ajst-1488	58	47	algorithms	algorithms	NOUN
ajst-1488	58	48	number	number	NOUN
ajst-1488	58	49	journal	journal	NOUN
ajst-1488	58	50	name	name	NOUN
ajst-1488	58	51	or	or	CCONJ
ajst-1488	58	52	source	source	NOUN
ajst-1488	58	53	number	number	NOUN
ajst-1488	58	54	of	of	ADP
ajst-1488	58	55	publications	publication	NOUN
ajst-1488	58	56	percentage（%	percentage（%	X
ajst-1488	58	57	）	）	PROPN
ajst-1488	58	58	1	1	NUM
ajst-1488	58	59	china	china	PROPN
ajst-1488	58	60	petroleum	petroleum	NOUN
ajst-1488	58	61	machinery	machinery	NOUN
ajst-1488	58	62	75	75	NUM
ajst-1488	58	63	10.01	10.01	NUM
ajst-1488	58	64	%	%	NOUN
ajst-1488	58	65	2	2	NUM
ajst-1488	58	66	oil	oil	NOUN
ajst-1488	58	67	field	field	NOUN
ajst-1488	58	68	equipment	equipment	NOUN
ajst-1488	58	69	50	50	NUM
ajst-1488	58	70	6.68	6.68	NUM
ajst-1488	58	71	%	%	NOUN
ajst-1488	58	72	3	3	NUM
ajst-1488	58	73	horticulture	horticulture	NOUN
ajst-1488	58	74	week	week	NOUN
ajst-1488	58	75	42	42	NUM
ajst-1488	58	76	5.61	5.61	NUM
ajst-1488	58	77	%	%	NOUN
ajst-1488	58	78	4	4	NUM
ajst-1488	58	79	china	china	PROPN
ajst-1488	58	80	university	university	PROPN
ajst-1488	58	81	of	of	ADP
ajst-1488	58	82	petroleum	petroleum	NOUN
ajst-1488	58	83	(	(	PUNCT
ajst-1488	58	84	east	east	PROPN
ajst-1488	58	85	china	china	PROPN
ajst-1488	58	86	)	)	PUNCT
ajst-1488	58	87	35	35	NUM
ajst-1488	58	88	4.67	4.67	NUM
ajst-1488	58	89	%	%	NOUN
ajst-1488	58	90	5	5	NUM
ajst-1488	58	91	di	di	NOUN
ajst-1488	58	92	huo	huo	NOUN
ajst-1488	58	93	30	30	NUM
ajst-1488	58	94	4.01	4.01	NUM
ajst-1488	58	95	%	%	NOUN
ajst-1488	58	96	6	6	NUM
ajst-1488	58	97	china	china	PROPN
ajst-1488	58	98	petroleum	petroleum	PROPN
ajst-1488	58	99	and	and	CCONJ
ajst-1488	58	100	chemical	chemical	NOUN
ajst-1488	58	101	standard	standard	NOUN
ajst-1488	58	102	and	and	CCONJ
ajst-1488	58	103	quality	quality	NOUN
ajst-1488	58	104	29	29	NUM
ajst-1488	58	105	3.87	3.87	NUM
ajst-1488	58	106	%	%	NOUN
ajst-1488	58	107	7	7	NUM
ajst-1488	58	108	china	china	PROPN
ajst-1488	58	109	offshore	offshore	ADJ
ajst-1488	58	110	platform	platform	NOUN
ajst-1488	58	111	27	27	NUM
ajst-1488	58	112	3.60	3.60	NUM
ajst-1488	58	113	%	%	NOUN
ajst-1488	58	114	8	8	NUM
ajst-1488	58	115	science	science	NOUN
ajst-1488	58	116	news	news	NOUN
ajst-1488	58	117	24	24	NUM
ajst-1488	58	118	3.20	3.20	NUM
ajst-1488	58	119	%	%	NOUN
ajst-1488	58	120	9	9	NUM
ajst-1488	58	121	harbin	harbin	PROPN
ajst-1488	58	122	engineering	engineering	PROPN
ajst-1488	58	123	university	university	PROPN
ajst-1488	58	124	22	22	NUM
ajst-1488	58	125	2.94	2.94	NUM
ajst-1488	58	126	%	%	NOUN
ajst-1488	58	127	10	10	NUM
ajst-1488	58	128	well	well	NOUN
ajst-1488	58	129	testing	test	VERB
ajst-1488	58	130	21	21	NUM
ajst-1488	58	131	2.80	2.80	NUM
ajst-1488	58	132	%	%	NOUN
ajst-1488	58	133	3.5	3.5	NUM
ajst-1488	58	134	.	.	PUNCT
ajst-1488	59	1	author	author	NOUN
ajst-1488	59	2	analysis	analysis	NOUN
ajst-1488	59	3	of	of	ADP
ajst-1488	59	4	christmas	christmas	PROPN
ajst-1488	59	5	tree	tree	NOUN
ajst-1488	59	6	research	research	NOUN
ajst-1488	59	7	author	author	NOUN
ajst-1488	59	8	analysis	analysis	NOUN
ajst-1488	59	9	was	be	AUX
ajst-1488	59	10	carried	carry	VERB
ajst-1488	59	11	out	out	ADP
ajst-1488	59	12	by	by	ADP
ajst-1488	59	13	citespace	citespace	NOUN
ajst-1488	59	14	software	software	NOUN
ajst-1488	59	15	,	,	PUNCT
ajst-1488	59	16	and	and	CCONJ
ajst-1488	59	17	the	the	DET
ajst-1488	59	18	network	network	NOUN
ajst-1488	59	19	map	map	NOUN
ajst-1488	59	20	was	be	AUX
ajst-1488	59	21	obtained	obtain	VERB
ajst-1488	59	22	as	as	SCONJ
ajst-1488	59	23	shown	show	VERB
ajst-1488	59	24	in	in	ADP
ajst-1488	59	25	fig	fig	NOUN
ajst-1488	59	26	.	.	PUNCT
ajst-1488	60	1	5	5	NUM
ajst-1488	60	2	.	.	PUNCT
ajst-1488	60	3	according	accord	VERB
ajst-1488	60	4	to	to	ADP
ajst-1488	60	5	the	the	DET
ajst-1488	60	6	parameters	parameter	NOUN
ajst-1488	60	7	in	in	ADP
ajst-1488	60	8	the	the	DET
ajst-1488	60	9	upper	upper	ADJ
ajst-1488	60	10	left	left	NOUN
ajst-1488	60	11	corner	corner	NOUN
ajst-1488	60	12	,	,	PUNCT
ajst-1488	60	13	a	a	DET
ajst-1488	60	14	total	total	NOUN
ajst-1488	60	15	of	of	ADP
ajst-1488	60	16	780	780	NUM
ajst-1488	60	17	authors	author	NOUN
ajst-1488	60	18	around	around	ADP
ajst-1488	60	19	the	the	DET
ajst-1488	60	20	world	world	NOUN
ajst-1488	60	21	published	publish	VERB
ajst-1488	60	22	literatures	literature	NOUN
ajst-1488	60	23	related	relate	VERB
ajst-1488	60	24	to	to	ADP
ajst-1488	60	25	christmas	christmas	NOUN
ajst-1488	60	26	trees	tree	NOUN
ajst-1488	60	27	,	,	PUNCT
ajst-1488	60	28	and	and	CCONJ
ajst-1488	60	29	there	there	PRON
ajst-1488	60	30	were	be	VERB
ajst-1488	60	31	865	865	NUM
ajst-1488	60	32	cooperative	cooperative	ADJ
ajst-1488	60	33	relationships	relationship	NOUN
ajst-1488	60	34	among	among	ADP
ajst-1488	60	35	them	they	PRON
ajst-1488	60	36	.	.	PUNCT
ajst-1488	61	1	the	the	DET
ajst-1488	61	2	top	top	ADJ
ajst-1488	61	3	10	10	NUM
ajst-1488	61	4	authors	author	NOUN
ajst-1488	61	5	can	can	AUX
ajst-1488	61	6	be	be	AUX
ajst-1488	61	7	found	find	VERB
ajst-1488	61	8	as	as	SCONJ
ajst-1488	61	9	follows	follow	VERB
ajst-1488	61	10	:	:	PUNCT
ajst-1488	61	11	invalid(193	invalid(193	NUM
ajst-1488	61	12	papers	paper	NOUN
ajst-1488	61	13	)	)	PUNCT
ajst-1488	61	14	,	,	PUNCT
ajst-1488	61	15	anonymmous	anonymmous	ADJ
ajst-1488	61	16	(	(	PUNCT
ajst-1488	61	17	112	112	NUM
ajst-1488	61	18	papers	paper	NOUN
ajst-1488	61	19	)	)	PUNCT
ajst-1488	61	20	,	,	PUNCT
ajst-1488	61	21	menglan	menglan	ADJ
ajst-1488	61	22	duan[12	duan[12	PROPN
ajst-1488	61	23	]	]	X
ajst-1488	61	24	(	(	PUNCT
ajst-1488	61	25	53	53	NUM
ajst-1488	61	26	papers	paper	NOUN
ajst-1488	61	27	)	)	PUNCT
ajst-1488	61	28	,	,	PUNCT
ajst-1488	61	29	arne	arne	ADJ
ajst-1488	61	30	kirkebythomsen	kirkebythomsen	NOUN
ajst-1488	61	31	(	(	PUNCT
ajst-1488	61	32	31	31	NUM
ajst-1488	61	33	papers	paper	NOUN
ajst-1488	61	34	)	)	PUNCT
ajst-1488	61	35	,	,	PUNCT
ajst-1488	61	36	ansi	ansi	PROPN
ajst-1488	61	37	(	(	PUNCT
ajst-1488	61	38	30	30	NUM
ajst-1488	61	39	papers	paper	NOUN
ajst-1488	61	40	)	)	PUNCT
ajst-1488	61	41	,	,	PUNCT
ajst-1488	61	42	brunner	brunner	PROPN
ajst-1488	61	43	bernd	bernd	PROPN
ajst-1488	61	44	(	(	PUNCT
ajst-1488	61	45	29	29	NUM
ajst-1488	61	46	papers	paper	NOUN
ajst-1488	61	47	)	)	PUNCT
ajst-1488	61	48	,	,	PUNCT
ajst-1488	61	49	bsi	bsi	PROPN
ajst-1488	61	50	(	(	PUNCT
ajst-1488	61	51	28	28	NUM
ajst-1488	61	52	papers	paper	NOUN
ajst-1488	61	53	)	)	PUNCT
ajst-1488	61	54	,	,	PUNCT
ajst-1488	61	55	claire	claire	PROPN
ajst-1488	61	56	bird	bird	PROPN
ajst-1488	61	57	(	(	PUNCT
ajst-1488	61	58	26	26	NUM
ajst-1488	61	59	articles	article	NOUN
ajst-1488	61	60	)	)	PUNCT
ajst-1488	61	61	,	,	PUNCT
ajst-1488	61	62	pengju	pengju	PROPN
ajst-1488	61	63	zhang	zhang	PROPN
ajst-1488	61	64	(	(	PUNCT
ajst-1488	61	65	25	25	NUM
ajst-1488	61	66	articles	article	NOUN
ajst-1488	61	67	)	)	PUNCT
ajst-1488	61	68	,	,	PUNCT
ajst-1488	61	69	and	and	CCONJ
ajst-1488	61	70	coleman	coleman	PROPN
ajst-1488	61	71	mccleneghan	mccleneghan	PROPN
ajst-1488	61	72	(	(	PUNCT
ajst-1488	61	73	25	25	NUM
ajst-1488	61	74	articles	article	NOUN
ajst-1488	61	75	)	)	PUNCT
ajst-1488	61	76	.	.	PUNCT
ajst-1488	62	1	48	48	NUM
ajst-1488	62	2	figure	figure	NOUN
ajst-1488	62	3	5	5	NUM
ajst-1488	62	4	.	.	PUNCT
ajst-1488	63	1	chinese	chinese	ADJ
ajst-1488	63	2	author	author	NOUN
ajst-1488	63	3	cooperation	cooperation	NOUN
ajst-1488	63	4	network	network	NOUN
ajst-1488	63	5	map	map	NOUN
ajst-1488	63	6	of	of	ADP
ajst-1488	63	7	christmas	christmas	PROPN
ajst-1488	63	8	trees	tree	NOUN
ajst-1488	63	9	related	relate	VERB
ajst-1488	63	10	research	research	NOUN
ajst-1488	63	11	3.6	3.6	NUM
ajst-1488	63	12	.	.	PUNCT
ajst-1488	64	1	hotspot	hotspot	NOUN
ajst-1488	64	2	analysis	analysis	NOUN
ajst-1488	64	3	of	of	ADP
ajst-1488	64	4	christmas	christmas	PROPN
ajst-1488	64	5	tree	tree	NOUN
ajst-1488	64	6	research	research	NOUN
ajst-1488	64	7	each	each	DET
ajst-1488	64	8	document	document	NOUN
ajst-1488	64	9	has	have	VERB
ajst-1488	64	10	3	3	NUM
ajst-1488	64	11	-	-	SYM
ajst-1488	64	12	5	5	NUM
ajst-1488	64	13	keywords	keyword	NOUN
ajst-1488	64	14	,	,	PUNCT
ajst-1488	64	15	which	which	PRON
ajst-1488	64	16	are	be	AUX
ajst-1488	64	17	considered	consider	VERB
ajst-1488	64	18	to	to	PART
ajst-1488	64	19	be	be	AUX
ajst-1488	64	20	the	the	DET
ajst-1488	64	21	common	common	ADJ
ajst-1488	64	22	topic	topic	NOUN
ajst-1488	64	23	of	of	ADP
ajst-1488	64	24	attention	attention	NOUN
ajst-1488	64	25	of	of	ADP
ajst-1488	64	26	scholars	scholar	NOUN
ajst-1488	64	27	in	in	ADP
ajst-1488	64	28	this	this	DET
ajst-1488	64	29	field	field	NOUN
ajst-1488	64	30	.	.	PUNCT
ajst-1488	65	1	the	the	DET
ajst-1488	65	2	analysis	analysis	NOUN
ajst-1488	65	3	of	of	ADP
ajst-1488	65	4	keywords	keyword	NOUN
ajst-1488	65	5	can	can	AUX
ajst-1488	65	6	find	find	VERB
ajst-1488	65	7	the	the	DET
ajst-1488	65	8	research	research	NOUN
ajst-1488	65	9	hotspots	hotspot	NOUN
ajst-1488	65	10	in	in	ADP
ajst-1488	65	11	this	this	DET
ajst-1488	65	12	field	field	NOUN
ajst-1488	65	13	.	.	PUNCT
ajst-1488	66	1	keyword	keyword	NOUN
ajst-1488	66	2	analysis	analysis	NOUN
ajst-1488	66	3	in	in	ADP
ajst-1488	66	4	citespace	citespace	NOUN
ajst-1488	66	5	is	be	AUX
ajst-1488	66	6	mainly	mainly	ADV
ajst-1488	66	7	obtained	obtain	VERB
ajst-1488	66	8	through	through	ADP
ajst-1488	66	9	co	co	ADJ
ajst-1488	66	10	-	-	NOUN
ajst-1488	66	11	word	word	NOUN
ajst-1488	66	12	analysis	analysis	NOUN
ajst-1488	66	13	.	.	PUNCT
ajst-1488	67	1	this	this	DET
ajst-1488	67	2	paper	paper	NOUN
ajst-1488	67	3	directly	directly	ADV
ajst-1488	67	4	analyzes	analyze	VERB
ajst-1488	67	5	the	the	DET
ajst-1488	67	6	original	original	ADJ
ajst-1488	67	7	keywords	keyword	NOUN
ajst-1488	67	8	of	of	ADP
ajst-1488	67	9	the	the	DET
ajst-1488	67	10	literature	literature	NOUN
ajst-1488	67	11	and	and	CCONJ
ajst-1488	67	12	the	the	DET
ajst-1488	67	13	supplementary	supplementary	ADJ
ajst-1488	67	14	keywords	keyword	NOUN
ajst-1488	67	15	from	from	ADP
ajst-1488	67	16	the	the	DET
ajst-1488	67	17	database	database	NOUN
ajst-1488	67	18	through	through	ADP
ajst-1488	67	19	the	the	DET
ajst-1488	67	20	keyword	keyword	NOUN
ajst-1488	67	21	cooccurrence	cooccurrence	NOUN
ajst-1488	67	22	network	network	NOUN
ajst-1488	67	23	.	.	PUNCT
ajst-1488	68	1	at	at	ADP
ajst-1488	68	2	this	this	DET
ajst-1488	68	3	time	time	NOUN
ajst-1488	68	4	,	,	PUNCT
ajst-1488	68	5	the	the	DET
ajst-1488	68	6	node	node	ADJ
ajst-1488	68	7	type	type	NOUN
ajst-1488	68	8	in	in	ADP
ajst-1488	68	9	the	the	DET
ajst-1488	68	10	main	main	ADJ
ajst-1488	68	11	interface	interface	NOUN
ajst-1488	68	12	of	of	ADP
ajst-1488	68	13	citespace	citespace	NOUN
ajst-1488	68	14	needs	need	VERB
ajst-1488	68	15	to	to	PART
ajst-1488	68	16	be	be	AUX
ajst-1488	68	17	set	set	VERB
ajst-1488	68	18	as	as	ADP
ajst-1488	68	19	"	"	PUNCT
ajst-1488	68	20	keyword	keyword	NOUN
ajst-1488	68	21	"	"	PUNCT
ajst-1488	68	22	.	.	PUNCT
ajst-1488	69	1	other	other	ADJ
ajst-1488	69	2	parameters	parameter	NOUN
ajst-1488	69	3	are	be	AUX
ajst-1488	69	4	as	as	SCONJ
ajst-1488	69	5	follows	follow	VERB
ajst-1488	69	6	:	:	PUNCT
ajst-1488	69	7	time	time	NOUN
ajst-1488	69	8	slicing	slicing	NOUN
ajst-1488	69	9	:	:	PUNCT
ajst-1488	69	10	1990	1990	NUM
ajst-1488	69	11	-	-	SYM
ajst-1488	69	12	2020	2020	NUM
ajst-1488	69	13	;	;	PUNCT
ajst-1488	69	14	years	year	NOUN
ajst-1488	69	15	per	per	ADP
ajst-1488	69	16	slice	slice	NOUN
ajst-1488	69	17	:	:	PUNCT
ajst-1488	69	18	3	3	NUM
ajst-1488	69	19	;	;	PUNCT
ajst-1488	69	20	selection	selection	NOUN
ajst-1488	69	21	criteria	criterion	NOUN
ajst-1488	69	22	:	:	PUNCT
ajst-1488	69	23	top	top	NOUN
ajst-1488	69	24	50	50	NUM
ajst-1488	69	25	;	;	PUNCT
ajst-1488	69	26	links	link	NOUN
ajst-1488	69	27	strength	strength	NOUN
ajst-1488	69	28	:	:	PUNCT
ajst-1488	69	29	sliced	slice	VERB
ajst-1488	69	30	.	.	PUNCT
ajst-1488	70	1	after	after	ADP
ajst-1488	70	2	initial	initial	ADJ
ajst-1488	70	3	analysis	analysis	NOUN
ajst-1488	70	4	of	of	ADP
ajst-1488	70	5	the	the	DET
ajst-1488	70	6	data	datum	NOUN
ajst-1488	70	7	,	,	PUNCT
ajst-1488	70	8	finally	finally	ADV
ajst-1488	70	9	set	set	VERB
ajst-1488	70	10	the	the	DET
ajst-1488	70	11	pruning	prune	VERB
ajst-1488	70	12	method	method	NOUN
ajst-1488	70	13	to	to	ADP
ajst-1488	70	14	minimum	minimum	ADJ
ajst-1488	70	15	spanning	span	VERB
ajst-1488	70	16	tree	tree	NOUN
ajst-1488	70	17	,	,	PUNCT
ajst-1488	70	18	pruning	prune	VERB
ajst-1488	70	19	sliced	slice	VERB
ajst-1488	70	20	networks	network	NOUN
ajst-1488	70	21	.	.	PUNCT
ajst-1488	71	1	in	in	ADP
ajst-1488	71	2	the	the	DET
ajst-1488	71	3	process	process	NOUN
ajst-1488	71	4	of	of	ADP
ajst-1488	71	5	graph	graph	NOUN
ajst-1488	71	6	pruning	prune	VERB
ajst-1488	71	7	,	,	PUNCT
ajst-1488	71	8	keywords	keyword	NOUN
ajst-1488	71	9	with	with	ADP
ajst-1488	71	10	the	the	DET
ajst-1488	71	11	same	same	ADJ
ajst-1488	71	12	meaning	meaning	NOUN
ajst-1488	71	13	are	be	AUX
ajst-1488	71	14	merged	merge	VERB
ajst-1488	71	15	,	,	PUNCT
ajst-1488	71	16	and	and	CCONJ
ajst-1488	71	17	the	the	DET
ajst-1488	71	18	obtained	obtain	VERB
ajst-1488	71	19	keyword	keyword	NOUN
ajst-1488	71	20	cooccurrence	cooccurrence	NOUN
ajst-1488	71	21	knowledge	knowledge	NOUN
ajst-1488	71	22	graph	graph	NOUN
ajst-1488	71	23	is	be	AUX
ajst-1488	71	24	shown	show	VERB
ajst-1488	71	25	in	in	ADP
ajst-1488	71	26	fig	fig	NOUN
ajst-1488	71	27	.	.	PUNCT
ajst-1488	72	1	6	6	NUM
ajst-1488	72	2	.	.	X
ajst-1488	72	3	there	there	PRON
ajst-1488	72	4	are	be	VERB
ajst-1488	72	5	67	67	NUM
ajst-1488	72	6	nodes	node	NOUN
ajst-1488	72	7	,	,	PUNCT
ajst-1488	72	8	97	97	NUM
ajst-1488	72	9	connections	connection	NOUN
ajst-1488	72	10	,	,	PUNCT
ajst-1488	72	11	and	and	CCONJ
ajst-1488	72	12	the	the	DET
ajst-1488	72	13	network	network	NOUN
ajst-1488	72	14	density	density	NOUN
ajst-1488	72	15	is	be	AUX
ajst-1488	72	16	0.0439	0.0439	NUM
ajst-1488	72	17	.	.	PUNCT
ajst-1488	73	1	each	each	DET
ajst-1488	73	2	cross	cross	NOUN
ajst-1488	73	3	node	node	NOUN
ajst-1488	73	4	represents	represent	VERB
ajst-1488	73	5	a	a	DET
ajst-1488	73	6	keyword	keyword	NOUN
ajst-1488	73	7	,	,	PUNCT
ajst-1488	73	8	and	and	CCONJ
ajst-1488	73	9	the	the	DET
ajst-1488	73	10	larger	large	ADJ
ajst-1488	73	11	the	the	DET
ajst-1488	73	12	cross	cross	NOUN
ajst-1488	73	13	node	node	PROPN
ajst-1488	73	14	,	,	PUNCT
ajst-1488	73	15	the	the	PRON
ajst-1488	73	16	more	more	ADV
ajst-1488	73	17	frequently	frequently	ADV
ajst-1488	73	18	the	the	DET
ajst-1488	73	19	keyword	keyword	NOUN
ajst-1488	73	20	appears	appear	VERB
ajst-1488	73	21	.	.	PUNCT
ajst-1488	73	22	"	"	PUNCT
ajst-1488	74	1	christmas	christmas	PROPN
ajst-1488	74	2	tree	tree	NOUN
ajst-1488	74	3	"	"	PUNCT
ajst-1488	74	4	appeared	appear	VERB
ajst-1488	74	5	the	the	DET
ajst-1488	74	6	most	most	ADV
ajst-1488	74	7	frequently	frequently	ADV
ajst-1488	74	8	,	,	PUNCT
ajst-1488	74	9	201	201	NUM
ajst-1488	74	10	times	time	NOUN
ajst-1488	74	11	.	.	PUNCT
ajst-1488	75	1	through	through	ADP
ajst-1488	75	2	the	the	DET
ajst-1488	75	3	connection	connection	NOUN
ajst-1488	75	4	can	can	AUX
ajst-1488	75	5	explain	explain	VERB
ajst-1488	75	6	the	the	DET
ajst-1488	75	7	correlation	correlation	NOUN
ajst-1488	75	8	of	of	ADP
ajst-1488	75	9	christmas	christmas	PROPN
ajst-1488	75	10	tree	tree	NOUN
ajst-1488	75	11	research	research	NOUN
ajst-1488	75	12	.	.	PUNCT
ajst-1488	76	1	the	the	DET
ajst-1488	76	2	top	top	ADJ
ajst-1488	76	3	20	20	NUM
ajst-1488	76	4	keywords	keyword	NOUN
ajst-1488	76	5	with	with	ADP
ajst-1488	76	6	frequency	frequency	NOUN
ajst-1488	76	7	are	be	AUX
ajst-1488	76	8	shown	show	VERB
ajst-1488	76	9	in	in	ADP
ajst-1488	76	10	table	table	NOUN
ajst-1488	76	11	2	2	NUM
ajst-1488	76	12	.	.	PUNCT
ajst-1488	77	1	it	it	PRON
ajst-1488	77	2	can	can	AUX
ajst-1488	77	3	be	be	AUX
ajst-1488	77	4	seen	see	VERB
ajst-1488	77	5	from	from	ADP
ajst-1488	77	6	the	the	DET
ajst-1488	77	7	keywords	keyword	NOUN
ajst-1488	77	8	that	that	SCONJ
ajst-1488	77	9	there	there	PRON
ajst-1488	77	10	are	be	VERB
ajst-1488	77	11	many	many	ADJ
ajst-1488	77	12	researches	research	NOUN
ajst-1488	77	13	on	on	ADP
ajst-1488	77	14	subsea	subsea	NOUN
ajst-1488	77	15	christmas	christmas	PROPN
ajst-1488	77	16	tree	tree	NOUN
ajst-1488	77	17	.	.	PUNCT
ajst-1488	78	1	as	as	ADP
ajst-1488	78	2	a	a	DET
ajst-1488	78	3	research	research	NOUN
ajst-1488	78	4	hotspot	hotspot	NOUN
ajst-1488	78	5	,	,	PUNCT
ajst-1488	78	6	christmas	christmas	PROPN
ajst-1488	78	7	tree	tree	NOUN
ajst-1488	78	8	is	be	AUX
ajst-1488	78	9	also	also	ADV
ajst-1488	78	10	used	use	VERB
ajst-1488	78	11	in	in	ADP
ajst-1488	78	12	the	the	DET
ajst-1488	78	13	design	design	NOUN
ajst-1488	78	14	and	and	CCONJ
ajst-1488	78	15	test	test	NOUN
ajst-1488	78	16	of	of	ADP
ajst-1488	78	17	drilling	drilling	NOUN
ajst-1488	78	18	equipment	equipment	NOUN
ajst-1488	78	19	,	,	PUNCT
ajst-1488	78	20	and	and	CCONJ
ajst-1488	78	21	christmas	christmas	PROPN
ajst-1488	78	22	tree	tree	NOUN
ajst-1488	78	23	is	be	AUX
ajst-1488	78	24	mainly	mainly	ADV
ajst-1488	78	25	used	use	VERB
ajst-1488	78	26	in	in	ADP
ajst-1488	78	27	the	the	DET
ajst-1488	78	28	petroleum	petroleum	NOUN
ajst-1488	78	29	industry	industry	NOUN
ajst-1488	79	1	[	[	X
ajst-1488	79	2	13	13	NUM
ajst-1488	79	3	]	]	PUNCT
ajst-1488	79	4	and	and	CCONJ
ajst-1488	79	5	natural	natural	ADJ
ajst-1488	79	6	gas	gas	NOUN
ajst-1488	79	7	industry	industry	NOUN
ajst-1488	80	1	[	[	X
ajst-1488	80	2	14	14	NUM
ajst-1488	80	3	]	]	PUNCT
ajst-1488	80	4	.	.	PUNCT
ajst-1488	81	1	industry	industry	NOUN
ajst-1488	81	2	,	,	PUNCT
ajst-1488	81	3	materials	material	NOUN
ajst-1488	81	4	[	[	X
ajst-1488	81	5	7	7	NUM
ajst-1488	81	6	]	]	PUNCT
ajst-1488	81	7	,	,	PUNCT
ajst-1488	81	8	storage	storage	NOUN
ajst-1488	81	9	,	,	PUNCT
ajst-1488	81	10	etc	etc	X
ajst-1488	81	11	.	.	X
ajst-1488	81	12	figure	figure	VERB
ajst-1488	81	13	6	6	NUM
ajst-1488	81	14	.	.	PUNCT
ajst-1488	81	15	map	map	NOUN
ajst-1488	81	16	of	of	ADP
ajst-1488	81	17	research	research	NOUN
ajst-1488	81	18	keywords	keyword	NOUN
ajst-1488	81	19	related	relate	VERB
ajst-1488	81	20	to	to	ADP
ajst-1488	81	21	christmas	christmas	VERB
ajst-1488	81	22	trees	tree	NOUN
ajst-1488	81	23	3.7	3.7	NUM
ajst-1488	81	24	.	.	PUNCT
ajst-1488	82	1	keyword	keyword	NOUN
ajst-1488	82	2	cluster	cluster	NOUN
ajst-1488	82	3	analysis	analysis	NOUN
ajst-1488	82	4	of	of	ADP
ajst-1488	82	5	christmas	christmas	PROPN
ajst-1488	82	6	tree	tree	NOUN
ajst-1488	82	7	research	research	NOUN
ajst-1488	82	8	on	on	ADP
ajst-1488	82	9	the	the	DET
ajst-1488	82	10	basis	basis	NOUN
ajst-1488	82	11	of	of	ADP
ajst-1488	82	12	the	the	DET
ajst-1488	82	13	analysis	analysis	NOUN
ajst-1488	82	14	of	of	ADP
ajst-1488	82	15	the	the	DET
ajst-1488	82	16	research	research	NOUN
ajst-1488	82	17	hotspots	hotspot	NOUN
ajst-1488	82	18	of	of	ADP
ajst-1488	82	19	keywords	keyword	NOUN
ajst-1488	82	20	,	,	PUNCT
ajst-1488	82	21	cluster	cluster	NOUN
ajst-1488	82	22	analysis	analysis	NOUN
ajst-1488	82	23	can	can	AUX
ajst-1488	82	24	also	also	ADV
ajst-1488	82	25	be	be	AUX
ajst-1488	82	26	carried	carry	VERB
ajst-1488	82	27	out	out	ADP
ajst-1488	82	28	.	.	PUNCT
ajst-1488	83	1	cluster	cluster	NOUN
ajst-1488	83	2	analysis	analysis	NOUN
ajst-1488	83	3	[	[	X
ajst-1488	83	4	15	15	NUM
ajst-1488	83	5	]	]	PUNCT
ajst-1488	83	6	can	can	AUX
ajst-1488	83	7	analyze	analyze	VERB
ajst-1488	83	8	the	the	DET
ajst-1488	83	9	research	research	NOUN
ajst-1488	83	10	situation	situation	NOUN
ajst-1488	83	11	from	from	ADP
ajst-1488	83	12	different	different	ADJ
ajst-1488	83	13	perspectives	perspective	NOUN
ajst-1488	83	14	in	in	ADP
ajst-1488	83	15	this	this	DET
ajst-1488	83	16	research	research	NOUN
ajst-1488	83	17	field	field	NOUN
ajst-1488	83	18	,	,	PUNCT
ajst-1488	83	19	and	and	CCONJ
ajst-1488	83	20	can	can	AUX
ajst-1488	83	21	directly	directly	ADV
ajst-1488	83	22	and	and	CCONJ
ajst-1488	83	23	quickly	quickly	ADV
ajst-1488	83	24	capture	capture	VERB
ajst-1488	83	25	the	the	DET
ajst-1488	83	26	academic	academic	ADJ
ajst-1488	83	27	frontier	frontier	NOUN
ajst-1488	83	28	in	in	ADP
ajst-1488	83	29	the	the	DET
ajst-1488	83	30	field	field	NOUN
ajst-1488	83	31	of	of	ADP
ajst-1488	83	32	christmas	christmas	PROPN
ajst-1488	83	33	tree	tree	NOUN
ajst-1488	83	34	research	research	NOUN
ajst-1488	83	35	.	.	PUNCT
ajst-1488	84	1	for	for	ADP
ajst-1488	84	2	the	the	DET
ajst-1488	84	3	time	time	NOUN
ajst-1488	84	4	validity	validity	NOUN
ajst-1488	84	5	of	of	ADP
ajst-1488	84	6	the	the	DET
ajst-1488	84	7	cluster	cluster	NOUN
ajst-1488	84	8	analysis	analysis	NOUN
ajst-1488	84	9	,	,	PUNCT
ajst-1488	84	10	the	the	DET
ajst-1488	84	11	time	time	NOUN
ajst-1488	84	12	period	period	NOUN
ajst-1488	84	13	of	of	ADP
ajst-1488	84	14	this	this	DET
ajst-1488	84	15	analysis	analysis	NOUN
ajst-1488	84	16	is	be	AUX
ajst-1488	84	17	:	:	PUNCT
ajst-1488	84	18	2000	2000	NUM
ajst-1488	84	19	-	-	SYM
ajst-1488	84	20	2020	2020	NUM
ajst-1488	84	21	.	.	PUNCT
ajst-1488	85	1	all	all	DET
ajst-1488	85	2	keywords	keyword	NOUN
ajst-1488	85	3	are	be	AUX
ajst-1488	85	4	49	49	NUM
ajst-1488	85	5	clustered	clustered	ADJ
ajst-1488	85	6	,	,	PUNCT
ajst-1488	85	7	and	and	CCONJ
ajst-1488	85	8	the	the	DET
ajst-1488	85	9	results	result	NOUN
ajst-1488	85	10	show	show	VERB
ajst-1488	85	11	three	three	NUM
ajst-1488	85	12	clusters	cluster	NOUN
ajst-1488	85	13	,	,	PUNCT
ajst-1488	85	14	as	as	SCONJ
ajst-1488	85	15	shown	show	VERB
ajst-1488	85	16	in	in	ADP
ajst-1488	85	17	fig	fig	NOUN
ajst-1488	85	18	.	.	PUNCT
ajst-1488	86	1	7	7	X
ajst-1488	86	2	.	.	X
ajst-1488	86	3	they	they	PRON
ajst-1488	86	4	are	be	AUX
ajst-1488	86	5	:	:	PUNCT
ajst-1488	86	6	christmas	christmas	PROPN
ajst-1488	86	7	tree	tree	NOUN
ajst-1488	86	8	,	,	PUNCT
ajst-1488	86	9	subsea	subsea	NOUN
ajst-1488	86	10	christmas	christmas	PROPN
ajst-1488	86	11	tree	tree	NOUN
ajst-1488	86	12	,	,	PUNCT
ajst-1488	86	13	petroleum	petroleum	NOUN
ajst-1488	86	14	industry	industry	NOUN
ajst-1488	86	15	.	.	PUNCT
ajst-1488	87	1	table	table	NOUN
ajst-1488	87	2	2	2	NUM
ajst-1488	87	3	.	.	PUNCT
ajst-1488	87	4	high	high	ADJ
ajst-1488	87	5	frequency	frequency	NOUN
ajst-1488	87	6	keywords	keyword	NOUN
ajst-1488	87	7	of	of	ADP
ajst-1488	87	8	christmas	christmas	PROPN
ajst-1488	87	9	tree	tree	NOUN
ajst-1488	87	10	related	relate	VERB
ajst-1488	87	11	research	research	NOUN
ajst-1488	87	12	number	number	NOUN
ajst-1488	87	13	keywords	keyword	NOUN
ajst-1488	87	14	occurrence	occurrence	NOUN
ajst-1488	87	15	number	number	NOUN
ajst-1488	87	16	centrality	centrality	NOUN
ajst-1488	87	17	1	1	NUM
ajst-1488	87	18	christmas	christmas	NOUN
ajst-1488	87	19	tree	tree	NOUN
ajst-1488	87	20	201	201	NUM
ajst-1488	87	21	0.18	0.18	NUM
ajst-1488	87	22	2	2	NUM
ajst-1488	87	23	subsea	subsea	NOUN
ajst-1488	87	24	christmas	christmas	NOUN
ajst-1488	87	25	tree	tree	NOUN
ajst-1488	87	26	111	111	NUM
ajst-1488	87	27	0.12	0.12	NUM
ajst-1488	87	28	3	3	NUM
ajst-1488	87	29	drilling	drill	VERB
ajst-1488	87	30	92	92	NUM
ajst-1488	87	31	0.00	0.00	NUM
ajst-1488	87	32	4	4	NUM
ajst-1488	87	33	design	design	NOUN
ajst-1488	87	34	87	87	NUM
ajst-1488	87	35	0.01	0.01	NUM
ajst-1488	87	36	5	5	NUM
ajst-1488	87	37	experiment	experiment	NOUN
ajst-1488	87	38	81	81	NUM
ajst-1488	87	39	0.01	0.01	NUM
ajst-1488	87	40	6	6	NUM
ajst-1488	87	41	equipment	equipment	NOUN
ajst-1488	87	42	79	79	NUM
ajst-1488	87	43	0.02	0.02	NUM
ajst-1488	87	44	7	7	NUM
ajst-1488	87	45	petroleum	petroleum	NOUN
ajst-1488	87	46	industry	industry	NOUN
ajst-1488	87	47	78	78	NUM
ajst-1488	87	48	0.01	0.01	NUM
ajst-1488	87	49	8	8	NUM
ajst-1488	87	50	natural	natural	ADJ
ajst-1488	87	51	gas	gas	NOUN
ajst-1488	87	52	industry	industry	NOUN
ajst-1488	87	53	77	77	NUM
ajst-1488	87	54	0.00	0.00	NUM
ajst-1488	87	55	9	9	NUM
ajst-1488	87	56	valve	valve	NOUN
ajst-1488	87	57	72	72	NUM
ajst-1488	87	58	0.00	0.00	NUM
ajst-1488	87	59	10	10	NUM
ajst-1488	87	60	petroleum	petroleum	NOUN
ajst-1488	87	61	69	69	NUM
ajst-1488	87	62	0.02	0.02	NUM
ajst-1488	87	63	11	11	NUM
ajst-1488	87	64	natural	natural	ADJ
ajst-1488	87	65	gas	gas	NOUN
ajst-1488	87	66	68	68	NUM
ajst-1488	87	67	0.00	0.00	NUM
ajst-1488	87	68	12	12	NUM
ajst-1488	87	69	definition	definition	NOUN
ajst-1488	87	70	66	66	NUM
ajst-1488	87	71	0.08	0.08	NUM
ajst-1488	87	72	13	13	NUM
ajst-1488	87	73	industry	industry	NOUN
ajst-1488	87	74	66	66	NUM
ajst-1488	87	75	0.02	0.02	NUM
ajst-1488	87	76	14	14	NUM
ajst-1488	87	77	subsea	subsea	NOUN
ajst-1488	87	78	production	production	NOUN
ajst-1488	87	79	system	system	NOUN
ajst-1488	87	80	61	61	NUM
ajst-1488	87	81	0.23	0.23	NUM
ajst-1488	87	82	15	15	NUM
ajst-1488	87	83	wellhead	wellhead	NOUN
ajst-1488	87	84	device	device	NOUN
ajst-1488	87	85	57	57	NUM
ajst-1488	87	86	0.00	0.00	NUM
ajst-1488	87	87	16	16	NUM
ajst-1488	87	88	material	material	NOUN
ajst-1488	87	89	56	56	NUM
ajst-1488	87	90	0.00	0.00	NUM
ajst-1488	87	91	17	17	NUM
ajst-1488	87	92	applicability	applicability	NOUN
ajst-1488	87	93	56	56	NUM
ajst-1488	87	94	0.00	0.00	NUM
ajst-1488	87	95	18	18	NUM
ajst-1488	87	96	storage	storage	NOUN
ajst-1488	87	97	55	55	NUM
ajst-1488	87	98	0.00	0.00	NUM
ajst-1488	87	99	19	19	NUM
ajst-1488	87	100	underwater	underwater	ADJ
ajst-1488	87	101	mining	mining	NOUN
ajst-1488	87	102	55	55	NUM
ajst-1488	87	103	0.33	0.33	NUM
ajst-1488	87	104	20	20	NUM
ajst-1488	87	105	material	material	NOUN
ajst-1488	87	106	specification	specification	NOUN
ajst-1488	87	107	55	55	NUM
ajst-1488	87	108	0.00	0.00	NUM
ajst-1488	87	109	figure	figure	NOUN
ajst-1488	87	110	7	7	NUM
ajst-1488	87	111	.	.	PUNCT
ajst-1488	88	1	keywords	keyword	NOUN
ajst-1488	88	2	clustering	cluster	VERB
ajst-1488	88	3	map	map	NOUN
ajst-1488	88	4	of	of	ADP
ajst-1488	88	5	christmas	christmas	PROPN
ajst-1488	88	6	trees	tree	NOUN
ajst-1488	88	7	related	relate	VERB
ajst-1488	88	8	research	research	NOUN
ajst-1488	88	9	1	1	NUM
ajst-1488	88	10	)	)	PUNCT
ajst-1488	88	11	cluster	cluster	NOUN
ajst-1488	88	12	analysis	analysis	NOUN
ajst-1488	88	13	of	of	ADP
ajst-1488	88	14	"	"	PUNCT
ajst-1488	88	15	christmas	christmas	PROPN
ajst-1488	88	16	tree	tree	NOUN
ajst-1488	88	17	"	"	PUNCT
ajst-1488	88	18	the	the	DET
ajst-1488	88	19	subject	subject	ADJ
ajst-1488	88	20	word	word	NOUN
ajst-1488	88	21	studied	study	VERB
ajst-1488	88	22	in	in	ADP
ajst-1488	88	23	this	this	DET
ajst-1488	88	24	paper	paper	NOUN
ajst-1488	88	25	is	be	AUX
ajst-1488	88	26	christmas	christmas	NOUN
ajst-1488	88	27	tree	tree	NOUN
ajst-1488	88	28	,	,	PUNCT
ajst-1488	88	29	and	and	CCONJ
ajst-1488	88	30	it	it	PRON
ajst-1488	88	31	is	be	AUX
ajst-1488	88	32	normal	normal	ADJ
ajst-1488	88	33	to	to	PART
ajst-1488	88	34	classify	classify	VERB
ajst-1488	88	35	"	"	PUNCT
ajst-1488	88	36	christmas	christmas	PROPN
ajst-1488	88	37	tree	tree	NOUN
ajst-1488	88	38	"	"	PUNCT
ajst-1488	88	39	according	accord	VERB
ajst-1488	88	40	to	to	ADP
ajst-1488	88	41	citespace	citespace	NOUN
ajst-1488	88	42	cluster	cluster	NOUN
ajst-1488	88	43	analysis	analysis	NOUN
ajst-1488	88	44	.	.	PUNCT
ajst-1488	89	1	the	the	DET
ajst-1488	89	2	main	main	ADJ
ajst-1488	89	3	keywords	keyword	NOUN
ajst-1488	89	4	include	include	VERB
ajst-1488	89	5	underwater	underwater	ADJ
ajst-1488	89	6	mining	mining	NOUN
ajst-1488	89	7	,	,	PUNCT
ajst-1488	89	8	horizontal	horizontal	ADJ
ajst-1488	89	9	christmas	christmas	PROPN
ajst-1488	89	10	tree	tree	NOUN
ajst-1488	89	11	,	,	PUNCT
ajst-1488	89	12	wellhead	wellhead	NOUN
ajst-1488	89	13	device	device	NOUN
ajst-1488	89	14	,	,	PUNCT
ajst-1488	89	15	subsea	subsea	NOUN
ajst-1488	89	16	production	production	NOUN
ajst-1488	89	17	system	system	NOUN
ajst-1488	89	18	,	,	PUNCT
ajst-1488	89	19	sealing	sealing	NOUN
ajst-1488	89	20	,	,	PUNCT
ajst-1488	89	21	construction	construction	NOUN
ajst-1488	89	22	equipment	equipment	NOUN
ajst-1488	89	23	,	,	PUNCT
ajst-1488	89	24	christmas	christmas	PROPN
ajst-1488	89	25	tree	tree	NOUN
ajst-1488	89	26	,	,	PUNCT
ajst-1488	89	27	subsea	subsea	NOUN
ajst-1488	89	28	horizontal	horizontal	ADJ
ajst-1488	89	29	christmas	christmas	PROPN
ajst-1488	89	30	tree	tree	NOUN
ajst-1488	89	31	,	,	PUNCT
ajst-1488	89	32	deep	deep	ADJ
ajst-1488	89	33	water	water	NOUN
ajst-1488	89	34	,	,	PUNCT
ajst-1488	89	35	installation	installation	NOUN
ajst-1488	89	36	,	,	PUNCT
ajst-1488	89	37	wellhead	wellhead	NOUN
ajst-1488	89	38	connection	connection	NOUN
ajst-1488	89	39	,	,	PUNCT
ajst-1488	89	40	finite	finite	ADJ
ajst-1488	89	41	element	element	NOUN
ajst-1488	89	42	analysis	analysis	NOUN
ajst-1488	89	43	,	,	PUNCT
ajst-1488	89	44	umbilical	umbilical	ADJ
ajst-1488	89	45	cord	cord	NOUN
ajst-1488	89	46	cable	cable	NOUN
ajst-1488	89	47	,	,	PUNCT
ajst-1488	89	48	oil	oil	NOUN
ajst-1488	89	49	mining	mining	NOUN
ajst-1488	89	50	,	,	PUNCT
ajst-1488	89	51	metal	metal	NOUN
ajst-1488	89	52	sealing	sealing	NOUN
ajst-1488	89	53	.	.	PUNCT
ajst-1488	90	1	2	2	X
ajst-1488	90	2	)	)	PUNCT
ajst-1488	90	3	"	"	PUNCT
ajst-1488	90	4	subsea	subsea	NOUN
ajst-1488	90	5	christmas	christmas	PROPN
ajst-1488	90	6	tree	tree	NOUN
ajst-1488	90	7	"	"	PUNCT
ajst-1488	90	8	cluster	cluster	NOUN
ajst-1488	90	9	analysis	analysis	NOUN
ajst-1488	90	10	the	the	DET
ajst-1488	90	11	key	key	ADJ
ajst-1488	90	12	words	word	NOUN
ajst-1488	90	13	of	of	ADP
ajst-1488	90	14	the	the	DET
ajst-1488	90	15	cluster	cluster	NOUN
ajst-1488	90	16	named	name	VERB
ajst-1488	90	17	"	"	PUNCT
ajst-1488	90	18	subsea	subsea	NOUN
ajst-1488	90	19	christmas	christmas	PROPN
ajst-1488	90	20	tree	tree	NOUN
ajst-1488	90	21	"	"	PUNCT
ajst-1488	90	22	mainly	mainly	ADV
ajst-1488	90	23	include	include	VERB
ajst-1488	90	24	:	:	PUNCT
ajst-1488	90	25	subsea	subsea	NOUN
ajst-1488	90	26	christmas	christmas	PROPN
ajst-1488	90	27	tree	tree	NOUN
ajst-1488	90	28	,	,	PUNCT
ajst-1488	90	29	tubing	tubing	NOUN
ajst-1488	90	30	hanger	hanger	NOUN
ajst-1488	90	31	,	,	PUNCT
ajst-1488	90	32	structural	structural	ADJ
ajst-1488	90	33	design	design	NOUN
ajst-1488	90	34	,	,	PUNCT
ajst-1488	90	35	mechanical	mechanical	ADJ
ajst-1488	90	36	analysis	analysis	NOUN
ajst-1488	90	37	,	,	PUNCT
ajst-1488	90	38	control	control	NOUN
ajst-1488	90	39	system	system	NOUN
ajst-1488	90	40	,	,	PUNCT
ajst-1488	90	41	subsea	subsea	NOUN
ajst-1488	90	42	production	production	NOUN
ajst-1488	90	43	control	control	NOUN
ajst-1488	90	44	system	system	NOUN
ajst-1488	90	45	,	,	PUNCT
ajst-1488	90	46	reliability	reliability	NOUN
ajst-1488	90	47	,	,	PUNCT
ajst-1488	90	48	hydraulic	hydraulic	ADJ
ajst-1488	90	49	control	control	NOUN
ajst-1488	90	50	,	,	PUNCT
ajst-1488	90	51	locking	locking	NOUN
ajst-1488	90	52	structure	structure	NOUN
ajst-1488	90	53	,	,	PUNCT
ajst-1488	90	54	contact	contact	NOUN
ajst-1488	90	55	analysis	analysis	NOUN
ajst-1488	90	56	,	,	PUNCT
ajst-1488	90	57	subsea	subsea	NOUN
ajst-1488	90	58	control	control	NOUN
ajst-1488	90	59	module	module	NOUN
ajst-1488	90	60	.	.	PUNCT
ajst-1488	91	1	3	3	X
ajst-1488	91	2	)	)	PUNCT
ajst-1488	91	3	"	"	PUNCT
ajst-1488	91	4	petroleum	petroleum	NOUN
ajst-1488	91	5	industry	industry	NOUN
ajst-1488	91	6	"	"	PUNCT
ajst-1488	91	7	cluster	cluster	NOUN
ajst-1488	91	8	analysis	analysis	NOUN
ajst-1488	91	9	keywords	keyword	NOUN
ajst-1488	91	10	named	name	VERB
ajst-1488	91	11	"	"	PUNCT
ajst-1488	91	12	petroleum	petroleum	NOUN
ajst-1488	91	13	industry	industry	NOUN
ajst-1488	91	14	"	"	PUNCT
ajst-1488	91	15	mainly	mainly	ADV
ajst-1488	91	16	include	include	VERB
ajst-1488	91	17	:	:	PUNCT
ajst-1488	91	18	flange	flange	NOUN
ajst-1488	91	19	,	,	PUNCT
ajst-1488	91	20	assembly	assembly	NOUN
ajst-1488	91	21	,	,	PUNCT
ajst-1488	91	22	mineral	mineral	NOUN
ajst-1488	91	23	oil	oil	NOUN
ajst-1488	91	24	,	,	PUNCT
ajst-1488	91	25	petroleum	petroleum	NOUN
ajst-1488	91	26	,	,	PUNCT
ajst-1488	91	27	industry	industry	NOUN
ajst-1488	91	28	,	,	PUNCT
ajst-1488	91	29	underwater	underwater	ADJ
ajst-1488	91	30	technology	technology	NOUN
ajst-1488	91	31	,	,	PUNCT
ajst-1488	91	32	underwater	underwater	ADJ
ajst-1488	91	33	operation	operation	NOUN
ajst-1488	91	34	,	,	PUNCT
ajst-1488	91	35	definition	definition	NOUN
ajst-1488	91	36	(	(	PUNCT
ajst-1488	91	37	terminology	terminology	NOUN
ajst-1488	91	38	)	)	PUNCT
ajst-1488	91	39	,	,	PUNCT
ajst-1488	91	40	hydrolysis	hydrolysis	NOUN
ajst-1488	91	41	resistance	resistance	NOUN
ajst-1488	91	42	,	,	PUNCT
ajst-1488	91	43	operation	operation	NOUN
ajst-1488	91	44	,	,	PUNCT
ajst-1488	91	45	natural	natural	ADJ
ajst-1488	91	46	gas	gas	NOUN
ajst-1488	91	47	,	,	PUNCT
ajst-1488	91	48	offshore	offshore	ADJ
ajst-1488	91	49	platform	platform	NOUN
ajst-1488	91	50	,	,	PUNCT
ajst-1488	91	51	combined	combine	VERB
ajst-1488	91	52	excavator	excavator	NOUN
ajst-1488	91	53	cutter	cutter	NOUN
ajst-1488	91	54	head	head	NOUN
ajst-1488	91	55	,	,	PUNCT
ajst-1488	91	56	platform	platform	NOUN
ajst-1488	91	57	,	,	PUNCT
ajst-1488	91	58	specification	specification	NOUN
ajst-1488	91	59	,	,	PUNCT
ajst-1488	91	60	offshore	offshore	ADJ
ajst-1488	91	61	construction	construction	NOUN
ajst-1488	91	62	projects	project	NOUN
ajst-1488	91	63	.	.	PUNCT
ajst-1488	92	1	4	4	X
ajst-1488	92	2	.	.	X
ajst-1488	92	3	discussion	discussion	NOUN
ajst-1488	92	4	4.1	4.1	NUM
ajst-1488	92	5	.	.	PUNCT
ajst-1488	93	1	attention	attention	NOUN
ajst-1488	93	2	has	have	AUX
ajst-1488	93	3	increased	increase	VERB
ajst-1488	93	4	and	and	CCONJ
ajst-1488	93	5	focusing	focus	VERB
ajst-1488	93	6	on	on	ADP
ajst-1488	93	7	developed	develop	VERB
ajst-1488	93	8	countries	country	NOUN
ajst-1488	93	9	to	to	ADP
ajst-1488	93	10	a	a	DET
ajst-1488	93	11	certain	certain	ADJ
ajst-1488	93	12	extent	extent	NOUN
ajst-1488	93	13	,	,	PUNCT
ajst-1488	93	14	the	the	DET
ajst-1488	93	15	number	number	NOUN
ajst-1488	93	16	of	of	ADP
ajst-1488	93	17	publications	publication	NOUN
ajst-1488	93	18	on	on	ADP
ajst-1488	93	19	research	research	NOUN
ajst-1488	93	20	related	relate	VERB
ajst-1488	93	21	to	to	ADP
ajst-1488	93	22	christmas	christmas	NOUN
ajst-1488	93	23	trees	tree	NOUN
ajst-1488	93	24	can	can	AUX
ajst-1488	93	25	reflect	reflect	VERB
ajst-1488	93	26	the	the	DET
ajst-1488	93	27	attention	attention	NOUN
ajst-1488	93	28	of	of	ADP
ajst-1488	93	29	researchers	researcher	NOUN
ajst-1488	93	30	in	in	ADP
ajst-1488	93	31	this	this	DET
ajst-1488	93	32	field	field	NOUN
ajst-1488	93	33	.	.	PUNCT
ajst-1488	94	1	it	it	PRON
ajst-1488	94	2	can	can	AUX
ajst-1488	94	3	be	be	AUX
ajst-1488	94	4	found	find	VERB
ajst-1488	94	5	that	that	SCONJ
ajst-1488	94	6	the	the	DET
ajst-1488	94	7	number	number	NOUN
ajst-1488	94	8	of	of	ADP
ajst-1488	94	9	publications	publication	NOUN
ajst-1488	94	10	in	in	ADP
ajst-1488	94	11	the	the	DET
ajst-1488	94	12	past	past	ADJ
ajst-1488	94	13	decade	decade	NOUN
ajst-1488	94	14	has	have	AUX
ajst-1488	94	15	increased	increase	VERB
ajst-1488	94	16	significantly	significantly	ADV
ajst-1488	94	17	compared	compare	VERB
ajst-1488	94	18	with	with	ADP
ajst-1488	94	19	that	that	PRON
ajst-1488	94	20	before	before	ADV
ajst-1488	94	21	.	.	PUNCT
ajst-1488	95	1	the	the	DET
ajst-1488	95	2	number	number	NOUN
ajst-1488	95	3	of	of	ADP
ajst-1488	95	4	publications	publication	NOUN
ajst-1488	95	5	based	base	VERB
ajst-1488	95	6	on	on	ADP
ajst-1488	95	7	wos	wos	X
ajst-1488	95	8	peaked	peak	VERB
ajst-1488	95	9	in	in	ADP
ajst-1488	95	10	2016	2016	NUM
ajst-1488	95	11	,	,	PUNCT
ajst-1488	95	12	and	and	CCONJ
ajst-1488	95	13	the	the	DET
ajst-1488	95	14	number	number	NOUN
ajst-1488	95	15	of	of	ADP
ajst-1488	95	16	publications	publication	NOUN
ajst-1488	95	17	based	base	VERB
ajst-1488	95	18	on	on	ADP
ajst-1488	95	19	cnki	cnki	PROPN
ajst-1488	95	20	peaked	peak	VERB
ajst-1488	95	21	in	in	ADP
ajst-1488	95	22	2019	2019	NUM
ajst-1488	95	23	.	.	PUNCT
ajst-1488	96	1	from	from	ADP
ajst-1488	96	2	the	the	DET
ajst-1488	96	3	analysis	analysis	NOUN
ajst-1488	96	4	of	of	ADP
ajst-1488	96	5	countries	country	NOUN
ajst-1488	96	6	/	/	SYM
ajst-1488	96	7	regions	region	NOUN
ajst-1488	96	8	related	relate	VERB
ajst-1488	96	9	to	to	ADP
ajst-1488	96	10	the	the	DET
ajst-1488	96	11	study	study	NOUN
ajst-1488	96	12	of	of	ADP
ajst-1488	96	13	christmas	christmas	PROPN
ajst-1488	96	14	tree	tree	NOUN
ajst-1488	96	15	,	,	PUNCT
ajst-1488	96	16	the	the	DET
ajst-1488	96	17	united	united	PROPN
ajst-1488	96	18	states	states	PROPN
ajst-1488	96	19	,	,	PUNCT
ajst-1488	96	20	denmark	denmark	NOUN
ajst-1488	96	21	and	and	CCONJ
ajst-1488	96	22	other	other	ADJ
ajst-1488	96	23	developed	develop	VERB
ajst-1488	96	24	countries	country	NOUN
ajst-1488	96	25	have	have	VERB
ajst-1488	96	26	more	more	ADJ
ajst-1488	96	27	research	research	NOUN
ajst-1488	96	28	,	,	PUNCT
ajst-1488	96	29	and	and	CCONJ
ajst-1488	96	30	the	the	DET
ajst-1488	96	31	united	united	PROPN
ajst-1488	96	32	states	states	PROPN
ajst-1488	96	33	is	be	AUX
ajst-1488	96	34	far	far	ADV
ajst-1488	96	35	ahead	ahead	ADV
ajst-1488	96	36	of	of	ADP
ajst-1488	96	37	the	the	DET
ajst-1488	96	38	first	first	ADJ
ajst-1488	96	39	.	.	PUNCT
ajst-1488	97	1	it	it	PRON
ajst-1488	97	2	can	can	AUX
ajst-1488	97	3	be	be	AUX
ajst-1488	97	4	analyzed	analyze	VERB
ajst-1488	97	5	that	that	SCONJ
ajst-1488	97	6	the	the	DET
ajst-1488	97	7	cooperation	cooperation	NOUN
ajst-1488	97	8	between	between	ADP
ajst-1488	97	9	countries	country	NOUN
ajst-1488	97	10	is	be	AUX
ajst-1488	97	11	also	also	ADV
ajst-1488	97	12	relatively	relatively	ADV
ajst-1488	97	13	close	close	ADJ
ajst-1488	97	14	.	.	PUNCT
ajst-1488	98	1	4.2	4.2	NUM
ajst-1488	98	2	.	.	PUNCT
ajst-1488	98	3	petroleum	petroleum	NOUN
ajst-1488	98	4	institutions	institution	NOUN
ajst-1488	98	5	and	and	CCONJ
ajst-1488	98	6	prominent	prominent	ADJ
ajst-1488	98	7	author	author	NOUN
ajst-1488	98	8	through	through	ADP
ajst-1488	98	9	visual	visual	ADJ
ajst-1488	98	10	analysis	analysis	NOUN
ajst-1488	98	11	,	,	PUNCT
ajst-1488	98	12	we	we	PRON
ajst-1488	98	13	can	can	AUX
ajst-1488	98	14	get	get	VERB
ajst-1488	98	15	the	the	DET
ajst-1488	98	16	domestic	domestic	ADJ
ajst-1488	98	17	offshore	offshore	ADJ
ajst-1488	98	18	oil	oil	NOUN
ajst-1488	98	19	engineering	engineering	NOUN
ajst-1488	98	20	co.ltd	co.ltd	PROPN
ajst-1488	98	21	.	.	PROPN
ajst-1488	98	22	,	,	PUNCT
ajst-1488	98	23	baoji	baoji	PROPN
ajst-1488	98	24	oilfield	oilfield	NOUN
ajst-1488	98	25	machinery	machinery	NOUN
ajst-1488	98	26	50	50	NUM
ajst-1488	98	27	company	company	NOUN
ajst-1488	98	28	,	,	PUNCT
ajst-1488	98	29	offshore	offshore	ADJ
ajst-1488	98	30	oil	oil	NOUN
ajst-1488	98	31	and	and	CCONJ
ajst-1488	98	32	gas	gas	NOUN
ajst-1488	98	33	research	research	NOUN
ajst-1488	98	34	center	center	NOUN
ajst-1488	98	35	of	of	ADP
ajst-1488	98	36	china	china	PROPN
ajst-1488	98	37	university	university	PROPN
ajst-1488	98	38	of	of	ADP
ajst-1488	98	39	petroleum(beijing	petroleum(beijing	PROPN
ajst-1488	98	40	)	)	PUNCT
ajst-1488	98	41	,	,	PUNCT
ajst-1488	98	42	chuanzhong	chuanzhong	NOUN
ajst-1488	98	43	oil	oil	NOUN
ajst-1488	98	44	&	&	CCONJ
ajst-1488	98	45	gas	gas	NOUN
ajst-1488	98	46	mines	mine	NOUN
ajst-1488	98	47	of	of	ADP
ajst-1488	98	48	southwest	southwest	ADJ
ajst-1488	98	49	oil	oil	NOUN
ajst-1488	98	50	and	and	CCONJ
ajst-1488	98	51	gas	gas	NOUN
ajst-1488	98	52	field	field	NOUN
ajst-1488	98	53	company	company	NOUN
ajst-1488	98	54	such	such	ADJ
ajst-1488	98	55	as	as	ADP
ajst-1488	98	56	the	the	DET
ajst-1488	98	57	upper	upper	ADJ
ajst-1488	98	58	oil	oil	NOUN
ajst-1488	98	59	and	and	CCONJ
ajst-1488	98	60	gas	gas	NOUN
ajst-1488	98	61	mining	mining	NOUN
ajst-1488	98	62	siltstones	siltstone	NOUN
ajst-1488	98	63	oil	oil	NOUN
ajst-1488	98	64	has	have	VERB
ajst-1488	98	65	a	a	DET
ajst-1488	98	66	contribution	contribution	NOUN
ajst-1488	98	67	to	to	ADP
ajst-1488	98	68	the	the	DET
ajst-1488	98	69	research	research	NOUN
ajst-1488	98	70	on	on	ADP
ajst-1488	98	71	the	the	DET
ajst-1488	98	72	christmas	christmas	PROPN
ajst-1488	98	73	tree	tree	NOUN
ajst-1488	98	74	,	,	PUNCT
ajst-1488	98	75	and	and	CCONJ
ajst-1488	98	76	can	can	AUX
ajst-1488	98	77	be	be	AUX
ajst-1488	98	78	seen	see	VERB
ajst-1488	98	79	through	through	ADP
ajst-1488	98	80	the	the	DET
ajst-1488	98	81	attachment	attachment	NOUN
ajst-1488	98	82	cooperation	cooperation	NOUN
ajst-1488	98	83	between	between	ADP
ajst-1488	98	84	various	various	ADJ
ajst-1488	98	85	agencies	agency	NOUN
ajst-1488	98	86	is	be	AUX
ajst-1488	98	87	very	very	ADV
ajst-1488	98	88	precise	precise	ADJ
ajst-1488	98	89	,	,	PUNCT
ajst-1488	98	90	in	in	ADP
ajst-1488	98	91	particular	particular	ADJ
ajst-1488	98	92	,	,	PUNCT
ajst-1488	98	93	the	the	DET
ajst-1488	98	94	more	more	ADJ
ajst-1488	98	95	institutions	institution	NOUN
ajst-1488	98	96	that	that	PRON
ajst-1488	98	97	publish	publish	VERB
ajst-1488	98	98	,	,	PUNCT
ajst-1488	98	99	the	the	PRON
ajst-1488	98	100	closer	close	ADJ
ajst-1488	98	101	the	the	DET
ajst-1488	98	102	relationship	relationship	NOUN
ajst-1488	98	103	between	between	ADP
ajst-1488	98	104	them	they	PRON
ajst-1488	98	105	and	and	CCONJ
ajst-1488	98	106	other	other	ADJ
ajst-1488	98	107	institutions	institution	NOUN
ajst-1488	98	108	;	;	PUNCT
ajst-1488	98	109	foreign	foreign	ADJ
ajst-1488	98	110	department	department	NOUN
ajst-1488	98	111	of	of	ADP
ajst-1488	98	112	forestry	forestry	PROPN
ajst-1488	98	113	,	,	PUNCT
ajst-1488	98	114	danish	danish	ADJ
ajst-1488	98	115	centre	centre	NOUN
ajst-1488	98	116	for	for	ADP
ajst-1488	98	117	forest	forest	NOUN
ajst-1488	98	118	,	,	PUNCT
ajst-1488	98	119	department	department	NOUN
ajst-1488	98	120	of	of	ADP
ajst-1488	98	121	botany	botany	NOUN
ajst-1488	98	122	,	,	PUNCT
ajst-1488	98	123	washington	washington	PROPN
ajst-1488	98	124	state	state	PROPN
ajst-1488	98	125	university	university	PROPN
ajst-1488	98	126	research	research	NOUN
ajst-1488	98	127	and	and	CCONJ
ajst-1488	98	128	the	the	DET
ajst-1488	98	129	extension	extension	NOUN
ajst-1488	98	130	center	center	NOUN
ajst-1488	98	131	,	,	PUNCT
ajst-1488	98	132	innotest	innotest	ADJ
ajst-1488	98	133	company	company	NOUN
ajst-1488	98	134	,	,	PUNCT
ajst-1488	98	135	and	and	CCONJ
ajst-1488	98	136	others	other	NOUN
ajst-1488	98	137	have	have	AUX
ajst-1488	98	138	also	also	ADV
ajst-1488	98	139	made	make	VERB
ajst-1488	98	140	progress	progress	NOUN
ajst-1488	98	141	.	.	PUNCT
ajst-1488	99	1	according	accord	VERB
ajst-1488	99	2	to	to	ADP
ajst-1488	99	3	the	the	DET
ajst-1488	99	4	analysis	analysis	NOUN
ajst-1488	99	5	of	of	ADP
ajst-1488	99	6	the	the	DET
ajst-1488	99	7	authors	author	NOUN
ajst-1488	99	8	of	of	ADP
ajst-1488	99	9	the	the	DET
ajst-1488	99	10	research	research	NOUN
ajst-1488	99	11	on	on	ADP
ajst-1488	99	12	christmas	christmas	PROPN
ajst-1488	99	13	tree	tree	NOUN
ajst-1488	99	14	,	,	PUNCT
ajst-1488	99	15	menglan	menglan	PROPN
ajst-1488	99	16	duan	duan	PROPN
ajst-1488	99	17	from	from	ADP
ajst-1488	99	18	the	the	DET
ajst-1488	99	19	offshore	offshore	ADJ
ajst-1488	99	20	oil	oil	NOUN
ajst-1488	99	21	and	and	CCONJ
ajst-1488	99	22	gas	gas	NOUN
ajst-1488	99	23	research	research	NOUN
ajst-1488	99	24	center	center	NOUN
ajst-1488	99	25	of	of	ADP
ajst-1488	99	26	china	china	PROPN
ajst-1488	99	27	university	university	PROPN
ajst-1488	99	28	of	of	ADP
ajst-1488	99	29	petroleum	petroleum	NOUN
ajst-1488	99	30	(	(	PUNCT
ajst-1488	99	31	beijing	beijing	PROPN
ajst-1488	99	32	)	)	PUNCT
ajst-1488	99	33	,	,	PUNCT
ajst-1488	99	34	xiaolan	xiaolan	PROPN
ajst-1488	99	35	,	,	PUNCT
ajst-1488	99	36	luo	luo	PROPN
ajst-1488	99	37	,	,	PUNCT
ajst-1488	99	38	jian	jian	PROPN
ajst-1488	99	39	liu	liu	PROPN
ajst-1488	100	1	[	[	X
ajst-1488	100	2	16	16	NUM
ajst-1488	100	3	-	-	SYM
ajst-1488	100	4	17	17	NUM
ajst-1488	100	5	]	]	PUNCT
ajst-1488	100	6	and	and	CCONJ
ajst-1488	100	7	others	other	NOUN
ajst-1488	100	8	from	from	ADP
ajst-1488	100	9	the	the	DET
ajst-1488	100	10	school	school	NOUN
ajst-1488	100	11	of	of	ADP
ajst-1488	100	12	ocean	ocean	PROPN
ajst-1488	100	13	engineering	engineering	PROPN
ajst-1488	100	14	of	of	ADP
ajst-1488	100	15	china	china	PROPN
ajst-1488	100	16	university	university	PROPN
ajst-1488	100	17	of	of	ADP
ajst-1488	100	18	petroleum	petroleum	NOUN
ajst-1488	100	19	have	have	AUX
ajst-1488	100	20	done	do	VERB
ajst-1488	100	21	a	a	DET
ajst-1488	100	22	lot	lot	NOUN
ajst-1488	100	23	of	of	ADP
ajst-1488	100	24	research	research	NOUN
ajst-1488	100	25	,	,	PUNCT
ajst-1488	100	26	and	and	CCONJ
ajst-1488	100	27	there	there	PRON
ajst-1488	100	28	are	be	VERB
ajst-1488	100	29	very	very	ADV
ajst-1488	100	30	close	close	ADJ
ajst-1488	100	31	connections	connection	NOUN
ajst-1488	100	32	among	among	ADP
ajst-1488	100	33	the	the	DET
ajst-1488	100	34	authors	author	NOUN
ajst-1488	100	35	,	,	PUNCT
ajst-1488	100	36	with	with	ADP
ajst-1488	100	37	a	a	DET
ajst-1488	100	38	total	total	NOUN
ajst-1488	100	39	of	of	ADP
ajst-1488	100	40	4171	4171	NUM
ajst-1488	100	41	connections	connection	NOUN
ajst-1488	100	42	.	.	PUNCT
ajst-1488	101	1	some	some	DET
ajst-1488	101	2	foreign	foreign	ADJ
ajst-1488	101	3	authors	author	NOUN
ajst-1488	101	4	have	have	AUX
ajst-1488	101	5	published	publish	VERB
ajst-1488	101	6	a	a	DET
ajst-1488	101	7	large	large	ADJ
ajst-1488	101	8	number	number	NOUN
ajst-1488	101	9	of	of	ADP
ajst-1488	101	10	papers	paper	NOUN
ajst-1488	101	11	but	but	CCONJ
ajst-1488	101	12	have	have	VERB
ajst-1488	101	13	little	little	ADJ
ajst-1488	101	14	correlation	correlation	NOUN
ajst-1488	101	15	with	with	ADP
ajst-1488	101	16	each	each	DET
ajst-1488	101	17	other	other	ADJ
ajst-1488	101	18	.	.	PUNCT
ajst-1488	102	1	4.3	4.3	NUM
ajst-1488	102	2	.	.	PUNCT
ajst-1488	102	3	subsea	subsea	NOUN
ajst-1488	102	4	christmas	christmas	PROPN
ajst-1488	102	5	tree	tree	NOUN
ajst-1488	102	6	has	have	AUX
ajst-1488	102	7	become	become	VERB
ajst-1488	102	8	a	a	DET
ajst-1488	102	9	new	new	ADJ
ajst-1488	102	10	research	research	NOUN
ajst-1488	102	11	hotspot	hotspot	NOUN
ajst-1488	102	12	through	through	ADP
ajst-1488	102	13	cluster	cluster	NOUN
ajst-1488	102	14	analysis	analysis	NOUN
ajst-1488	102	15	,	,	PUNCT
ajst-1488	102	16	three	three	NUM
ajst-1488	102	17	cluster	cluster	NOUN
ajst-1488	102	18	words	word	NOUN
ajst-1488	102	19	are	be	AUX
ajst-1488	102	20	obtained	obtain	VERB
ajst-1488	102	21	:	:	PUNCT
ajst-1488	102	22	christmas	christmas	PROPN
ajst-1488	102	23	tree	tree	NOUN
ajst-1488	102	24	,	,	PUNCT
ajst-1488	102	25	subsea	subsea	NOUN
ajst-1488	102	26	christmas	christmas	NOUN
ajst-1488	102	27	tree	tree	NOUN
ajst-1488	103	1	[	[	X
ajst-1488	103	2	18	18	NUM
ajst-1488	103	3	]	]	PUNCT
ajst-1488	103	4	and	and	CCONJ
ajst-1488	103	5	petroleum	petroleum	NOUN
ajst-1488	103	6	industry	industry	NOUN
ajst-1488	103	7	.	.	PUNCT
ajst-1488	104	1	combined	combine	VERB
ajst-1488	104	2	with	with	ADP
ajst-1488	104	3	the	the	DET
ajst-1488	104	4	annual	annual	ADJ
ajst-1488	104	5	analysis	analysis	NOUN
ajst-1488	104	6	of	of	ADP
ajst-1488	104	7	the	the	DET
ajst-1488	104	8	paper	paper	NOUN
ajst-1488	104	9	,	,	PUNCT
ajst-1488	104	10	it	it	PRON
ajst-1488	104	11	can	can	AUX
ajst-1488	104	12	be	be	AUX
ajst-1488	104	13	concluded	conclude	VERB
ajst-1488	104	14	that	that	SCONJ
ajst-1488	104	15	subsea	subsea	NOUN
ajst-1488	104	16	christmas	christmas	PROPN
ajst-1488	104	17	tree	tree	NOUN
ajst-1488	104	18	is	be	AUX
ajst-1488	104	19	a	a	DET
ajst-1488	104	20	new	new	ADJ
ajst-1488	104	21	research	research	NOUN
ajst-1488	104	22	hotspot	hotspot	NOUN
ajst-1488	104	23	.	.	PUNCT
ajst-1488	105	1	both	both	PRON
ajst-1488	105	2	christmas	christmas	PROPN
ajst-1488	105	3	tree	tree	NOUN
ajst-1488	105	4	and	and	CCONJ
ajst-1488	105	5	petroleum	petroleum	NOUN
ajst-1488	105	6	industry	industry	NOUN
ajst-1488	105	7	are	be	AUX
ajst-1488	105	8	relatively	relatively	ADV
ajst-1488	105	9	traditional	traditional	ADJ
ajst-1488	105	10	research	research	NOUN
ajst-1488	105	11	,	,	PUNCT
ajst-1488	105	12	and	and	CCONJ
ajst-1488	105	13	some	some	DET
ajst-1488	105	14	keywords	keyword	NOUN
ajst-1488	105	15	of	of	ADP
ajst-1488	105	16	equipment	equipment	NOUN
ajst-1488	105	17	are	be	AUX
ajst-1488	105	18	relatively	relatively	ADV
ajst-1488	105	19	scattered	scatter	VERB
ajst-1488	105	20	and	and	CCONJ
ajst-1488	105	21	do	do	AUX
ajst-1488	105	22	not	not	PART
ajst-1488	105	23	form	form	VERB
ajst-1488	105	24	a	a	DET
ajst-1488	105	25	cluster	cluster	NOUN
ajst-1488	105	26	,	,	PUNCT
ajst-1488	105	27	but	but	CCONJ
ajst-1488	105	28	they	they	PRON
ajst-1488	105	29	are	be	AUX
ajst-1488	105	30	also	also	ADV
ajst-1488	105	31	relatively	relatively	ADV
ajst-1488	105	32	traditional	traditional	ADJ
ajst-1488	105	33	research	research	NOUN
ajst-1488	105	34	on	on	ADP
ajst-1488	105	35	christmas	christmas	PROPN
ajst-1488	105	36	tree	tree	NOUN
ajst-1488	105	37	.	.	PUNCT
ajst-1488	106	1	the	the	DET
ajst-1488	106	2	clustering	clustering	NOUN
ajst-1488	106	3	of	of	ADP
ajst-1488	106	4	subsea	subsea	NOUN
ajst-1488	106	5	production	production	NOUN
ajst-1488	106	6	control	control	NOUN
ajst-1488	106	7	system	system	NOUN
ajst-1488	106	8	,	,	PUNCT
ajst-1488	106	9	subsea	subsea	NOUN
ajst-1488	106	10	control	control	NOUN
ajst-1488	106	11	module	module	NOUN
ajst-1488	106	12	and	and	CCONJ
ajst-1488	106	13	other	other	ADJ
ajst-1488	106	14	new	new	ADJ
ajst-1488	106	15	keywords	keyword	NOUN
ajst-1488	106	16	in	in	ADP
ajst-1488	106	17	recent	recent	ADJ
ajst-1488	106	18	years	year	NOUN
ajst-1488	106	19	are	be	AUX
ajst-1488	106	20	also	also	ADV
ajst-1488	106	21	worthy	worthy	ADJ
ajst-1488	106	22	of	of	ADP
ajst-1488	106	23	the	the	DET
ajst-1488	106	24	attention	attention	NOUN
ajst-1488	106	25	of	of	ADP
ajst-1488	106	26	scholars	scholar	NOUN
ajst-1488	106	27	in	in	ADP
ajst-1488	106	28	subsea	subsea	NOUN
ajst-1488	106	29	christmas	christmas	PROPN
ajst-1488	106	30	tree	tree	NOUN
ajst-1488	106	31	research	research	NOUN
ajst-1488	106	32	.	.	PUNCT
ajst-1488	107	1	it	it	PRON
ajst-1488	107	2	is	be	AUX
ajst-1488	107	3	also	also	ADV
ajst-1488	107	4	related	relate	VERB
ajst-1488	107	5	to	to	ADP
ajst-1488	107	6	the	the	DET
ajst-1488	107	7	development	development	NOUN
ajst-1488	107	8	of	of	ADP
ajst-1488	107	9	offshore	offshore	ADJ
ajst-1488	107	10	oil	oil	NOUN
ajst-1488	107	11	and	and	CCONJ
ajst-1488	107	12	gas	gas	NOUN
ajst-1488	107	13	extraction	extraction	NOUN
ajst-1488	107	14	.	.	PUNCT
ajst-1488	108	1	5	5	X
ajst-1488	108	2	.	.	X
ajst-1488	108	3	conclusion	conclusion	NOUN
ajst-1488	108	4	through	through	ADP
ajst-1488	108	5	the	the	DET
ajst-1488	108	6	citespace	citespace	NOUN
ajst-1488	108	7	visualization	visualization	NOUN
ajst-1488	108	8	analysis	analysis	NOUN
ajst-1488	108	9	of	of	ADP
ajst-1488	108	10	the	the	DET
ajst-1488	108	11	research	research	NOUN
ajst-1488	108	12	related	relate	VERB
ajst-1488	108	13	to	to	ADP
ajst-1488	108	14	the	the	DET
ajst-1488	108	15	christmas	christmas	PROPN
ajst-1488	108	16	tree	tree	NOUN
ajst-1488	108	17	,	,	PUNCT
ajst-1488	108	18	the	the	DET
ajst-1488	108	19	research	research	NOUN
ajst-1488	108	20	status	status	NOUN
ajst-1488	108	21	of	of	ADP
ajst-1488	108	22	this	this	DET
ajst-1488	108	23	field	field	NOUN
ajst-1488	108	24	was	be	AUX
ajst-1488	108	25	obtained	obtain	VERB
ajst-1488	108	26	and	and	CCONJ
ajst-1488	108	27	it	it	PRON
ajst-1488	108	28	was	be	AUX
ajst-1488	108	29	concluded	conclude	VERB
ajst-1488	108	30	that	that	SCONJ
ajst-1488	108	31	the	the	DET
ajst-1488	108	32	subsea	subsea	NOUN
ajst-1488	108	33	christmas	christmas	PROPN
ajst-1488	108	34	tree	tree	NOUN
ajst-1488	108	35	was	be	AUX
ajst-1488	108	36	a	a	DET
ajst-1488	108	37	research	research	NOUN
ajst-1488	108	38	hotspot	hotspot	NOUN
ajst-1488	108	39	in	in	ADP
ajst-1488	108	40	the	the	DET
ajst-1488	108	41	christmas	christmas	PROPN
ajst-1488	108	42	tree	tree	NOUN
ajst-1488	108	43	field	field	NOUN
ajst-1488	108	44	.	.	PUNCT
ajst-1488	109	1	some	some	DET
ajst-1488	109	2	scholars	scholar	NOUN
ajst-1488	109	3	'	'	PART
ajst-1488	109	4	research	research	NOUN
ajst-1488	109	5	could	could	AUX
ajst-1488	109	6	rank	rank	VERB
ajst-1488	109	7	among	among	ADP
ajst-1488	109	8	the	the	DET
ajst-1488	109	9	forefront	forefront	NOUN
ajst-1488	109	10	of	of	ADP
ajst-1488	109	11	the	the	DET
ajst-1488	109	12	world	world	NOUN
ajst-1488	109	13	research	research	NOUN
ajst-1488	109	14	,	,	PUNCT
ajst-1488	109	15	but	but	CCONJ
ajst-1488	109	16	the	the	DET
ajst-1488	109	17	world	world	NOUN
ajst-1488	109	18	influence	influence	NOUN
ajst-1488	109	19	in	in	ADP
ajst-1488	109	20	the	the	DET
ajst-1488	109	21	christmas	christmas	PROPN
ajst-1488	109	22	tree	tree	NOUN
ajst-1488	109	23	field	field	NOUN
ajst-1488	109	24	was	be	AUX
ajst-1488	109	25	still	still	ADV
ajst-1488	109	26	insufficient	insufficient	ADJ
ajst-1488	109	27	.	.	PUNCT
ajst-1488	110	1	the	the	DET
ajst-1488	110	2	research	research	NOUN
ajst-1488	110	3	advantages	advantage	NOUN
ajst-1488	110	4	of	of	ADP
ajst-1488	110	5	major	major	ADJ
ajst-1488	110	6	domestic	domestic	ADJ
ajst-1488	110	7	petroleum	petroleum	NOUN
ajst-1488	110	8	institutions	institution	NOUN
ajst-1488	110	9	should	should	AUX
ajst-1488	110	10	be	be	AUX
ajst-1488	110	11	brought	bring	VERB
ajst-1488	110	12	into	into	ADP
ajst-1488	110	13	full	full	ADJ
ajst-1488	110	14	play	play	NOUN
ajst-1488	110	15	to	to	PART
ajst-1488	110	16	carry	carry	VERB
ajst-1488	110	17	out	out	ADP
ajst-1488	110	18	international	international	ADJ
ajst-1488	110	19	research	research	NOUN
ajst-1488	110	20	in	in	ADP
ajst-1488	110	21	this	this	DET
ajst-1488	110	22	field	field	NOUN
ajst-1488	110	23	and	and	CCONJ
ajst-1488	110	24	deepen	deepen	VERB
ajst-1488	110	25	domestic	domestic	ADJ
ajst-1488	110	26	and	and	CCONJ
ajst-1488	110	27	international	international	ADJ
ajst-1488	110	28	research	research	NOUN
ajst-1488	110	29	in	in	ADP
ajst-1488	110	30	the	the	DET
ajst-1488	110	31	field	field	NOUN
ajst-1488	110	32	of	of	ADP
ajst-1488	110	33	christmas	christmas	PROPN
ajst-1488	110	34	tree	tree	NOUN
ajst-1488	110	35	.	.	PUNCT
ajst-1488	111	1	references	reference	NOUN
ajst-1488	111	2	[	[	X
ajst-1488	111	3	1	1	X
ajst-1488	111	4	]	]	PUNCT
ajst-1488	111	5	xuesong	xuesong	PROPN
ajst-1488	111	6	mao	mao	PROPN
ajst-1488	111	7	,	,	PUNCT
ajst-1488	111	8	ming	ming	PROPN
ajst-1488	111	9	yue	yue	PROPN
ajst-1488	111	10	,	,	PUNCT
ajst-1488	111	11	and	and	CCONJ
ajst-1488	111	12	an	an	DET
ajst-1488	111	13	huang	huang	PROPN
ajst-1488	111	14	,	,	PUNCT
ajst-1488	111	15	analysis	analysis	NOUN
ajst-1488	111	16	of	of	ADP
ajst-1488	111	17	reasons	reason	NOUN
ajst-1488	111	18	and	and	CCONJ
ajst-1488	111	19	solutions	solution	NOUN
ajst-1488	111	20	for	for	ADP
ajst-1488	111	21	wellhead	wellhead	NOUN
ajst-1488	111	22	tree	tree	NOUN
ajst-1488	111	23	uplift	uplift	NOUN
ajst-1488	111	24	,	,	PUNCT
ajst-1488	111	25	china	china	PROPN
ajst-1488	111	26	petroleum	petroleum	PROPN
ajst-1488	111	27	and	and	CCONJ
ajst-1488	111	28	chemical	chemical	NOUN
ajst-1488	111	29	standards	standard	NOUN
ajst-1488	111	30	and	and	CCONJ
ajst-1488	111	31	quality	quality	NOUN
ajst-1488	111	32	,	,	PUNCT
ajst-1488	111	33	2019	2019	NUM
ajst-1488	111	34	,	,	PUNCT
ajst-1488	111	35	39(24	39(24	NUM
ajst-1488	111	36	):	):	PUNCT
ajst-1488	111	37	143	143	NUM
ajst-1488	111	38	-	-	SYM
ajst-1488	111	39	144	144	NUM
ajst-1488	111	40	.	.	PUNCT
ajst-1488	112	1	[	[	X
ajst-1488	112	2	2	2	X
ajst-1488	112	3	]	]	PUNCT
ajst-1488	112	4	jicheng	jicheng	PROPN
ajst-1488	112	5	zou	zou	PROPN
ajst-1488	112	6	,	,	PUNCT
ajst-1488	112	7	current	current	ADJ
ajst-1488	112	8	situation	situation	NOUN
ajst-1488	112	9	and	and	CCONJ
ajst-1488	112	10	treatment	treatment	NOUN
ajst-1488	112	11	of	of	ADP
ajst-1488	112	12	a	a	DET
ajst-1488	112	13	platform	platform	NOUN
ajst-1488	112	14	water	water	NOUN
ajst-1488	112	15	isolation	isolation	NOUN
ajst-1488	112	16	casing	casing	NOUN
ajst-1488	112	17	,	,	PUNCT
ajst-1488	112	18	china	china	PROPN
ajst-1488	112	19	ship	ship	NOUN
ajst-1488	112	20	repair	repair	NOUN
ajst-1488	112	21	,	,	PUNCT
ajst-1488	112	22	2020	2020	NUM
ajst-1488	112	23	,	,	PUNCT
ajst-1488	112	24	33(06	33(06	NUM
ajst-1488	112	25	):	):	PUNCT
ajst-1488	112	26	48	48	NUM
ajst-1488	112	27	-	-	SYM
ajst-1488	112	28	50	50	NUM
ajst-1488	112	29	.	.	PUNCT
ajst-1488	113	1	[	[	X
ajst-1488	113	2	3	3	X
ajst-1488	113	3	]	]	X
ajst-1488	113	4	xuejiao	xuejiao	PROPN
ajst-1488	113	5	chu	chu	PROPN
ajst-1488	113	6	,	,	PUNCT
ajst-1488	113	7	wei	wei	PROPN
ajst-1488	113	8	sun	sun	PROPN
ajst-1488	113	9	,	,	PUNCT
ajst-1488	113	10	feng	feng	PROPN
ajst-1488	113	11	li	li	PROPN
ajst-1488	113	12	,	,	PUNCT
ajst-1488	113	13	and	and	CCONJ
ajst-1488	113	14	tingwei	tingwei	PROPN
ajst-1488	113	15	yan	yan	PROPN
ajst-1488	113	16	,	,	PUNCT
ajst-1488	113	17	simulation	simulation	NOUN
ajst-1488	113	18	and	and	CCONJ
ajst-1488	113	19	experimental	experimental	ADJ
ajst-1488	113	20	study	study	NOUN
ajst-1488	113	21	on	on	ADP
ajst-1488	113	22	acoustic	acoustic	ADJ
ajst-1488	113	23	emission	emission	NOUN
ajst-1488	113	24	detection	detection	NOUN
ajst-1488	113	25	of	of	ADP
ajst-1488	113	26	dry	dry	ADJ
ajst-1488	113	27	wellhead	wellhead	NOUN
ajst-1488	113	28	tree	tree	NOUN
ajst-1488	113	29	,	,	PUNCT
ajst-1488	113	30	construction	construction	NOUN
ajst-1488	113	31	machinery	machinery	NOUN
ajst-1488	113	32	and	and	CCONJ
ajst-1488	113	33	equipment	equipment	NOUN
ajst-1488	113	34	,	,	PUNCT
ajst-1488	113	35	2019	2019	NUM
ajst-1488	113	36	,	,	PUNCT
ajst-1488	113	37	50(11	50(11	NUM
ajst-1488	113	38	):	):	PUNCT
ajst-1488	113	39	46	46	NUM
ajst-1488	113	40	-	-	SYM
ajst-1488	113	41	54	54	NUM
ajst-1488	113	42	+	+	NOUN
ajst-1488	113	43	8	8	NUM
ajst-1488	113	44	.	.	PUNCT
ajst-1488	114	1	[	[	X
ajst-1488	114	2	4	4	NUM
ajst-1488	114	3	]	]	X
ajst-1488	114	4	jie	jie	PROPN
ajst-1488	114	5	li	li	PROPN
ajst-1488	114	6	,	,	PUNCT
ajst-1488	114	7	cite	cite	VERB
ajst-1488	114	8	space	space	NOUN
ajst-1488	114	9	chinese	chinese	PROPN
ajst-1488	114	10	guide	guide	VERB
ajst-1488	114	11	2015	2015	NUM
ajst-1488	114	12	,	,	PUNCT
ajst-1488	114	13	(	(	PUNCT
ajst-1488	114	14	2015	2015	NUM
ajst-1488	114	15	-	-	SYM
ajst-1488	114	16	05	05	NUM
ajst-1488	114	17	-	-	PUNCT
ajst-1488	114	18	03	03	NUM
ajst-1488	114	19	)	)	PUNCT
ajst-1488	115	1	[	[	X
ajst-1488	115	2	201908	201908	NUM
ajst-1488	115	3	-	-	SYM
ajst-1488	115	4	01	01	NUM
ajst-1488	115	5	]	]	PUNCT
ajst-1488	115	6	.	.	PUNCT
ajst-1488	116	1	[	[	X
ajst-1488	116	2	5	5	X
ajst-1488	116	3	]	]	X
ajst-1488	116	4	chen	chen	PROPN
ajst-1488	116	5	c	c	PROPN
ajst-1488	116	6	m	m	PROPN
ajst-1488	116	7	,	,	PUNCT
ajst-1488	116	8	citespace	citespace	PROPN
ajst-1488	116	9	ii	ii	PROPN
ajst-1488	116	10	:	:	PUNCT
ajst-1488	116	11	detecting	detect	VERB
ajst-1488	116	12	and	and	CCONJ
ajst-1488	116	13	visualizing	visualize	VERB
ajst-1488	116	14	emerging	emerge	VERB
ajst-1488	116	15	trends	trend	NOUN
ajst-1488	116	16	and	and	CCONJ
ajst-1488	116	17	transient	transient	ADJ
ajst-1488	116	18	patterns	pattern	NOUN
ajst-1488	116	19	on	on	ADP
ajst-1488	116	20	scientific	scientific	ADJ
ajst-1488	116	21	literature	literature	NOUN
ajst-1488	116	22	,	,	PUNCT
ajst-1488	116	23	j	j	PROPN
ajst-1488	116	24	am	be	AUX
ajst-1488	116	25	soc	soc	PROPN
ajst-1488	116	26	inf	inf	PROPN
ajst-1488	116	27	sci	sci	PROPN
ajst-1488	116	28	,	,	PUNCT
ajst-1488	116	29	2006	2006	NUM
ajst-1488	116	30	,	,	PUNCT
ajst-1488	116	31	57	57	NUM
ajst-1488	116	32	(	(	PUNCT
ajst-1488	116	33	3	3	NUM
ajst-1488	116	34	)	)	PUNCT
ajst-1488	116	35	:	:	PUNCT
ajst-1488	116	36	359	359	NUM
ajst-1488	116	37	-	-	SYM
ajst-1488	116	38	377	377	NUM
ajst-1488	116	39	.	.	PUNCT
ajst-1488	117	1	doi	doi	NOUN
ajst-1488	117	2	:	:	PUNCT
ajst-1488	117	3	10.1002/	10.1002/	NUM
ajst-1488	117	4	asi.20317	asi.20317	NUM
ajst-1488	117	5	.	.	PUNCT
ajst-1488	118	1	[	[	X
ajst-1488	118	2	6	6	NUM
ajst-1488	118	3	]	]	PUNCT
ajst-1488	118	4	yujie	yujie	PROPN
ajst-1488	118	5	chen	chen	PROPN
ajst-1488	118	6	,	,	PUNCT
ajst-1488	118	7	visualization	visualization	NOUN
ajst-1488	118	8	analysis	analysis	NOUN
ajst-1488	118	9	of	of	ADP
ajst-1488	118	10	regional	regional	ADJ
ajst-1488	118	11	innovation	innovation	NOUN
ajst-1488	118	12	networks	network	NOUN
ajst-1488	118	13	,	,	PUNCT
ajst-1488	118	14	cooperative	cooperative	ADJ
ajst-1488	118	15	economics	economic	NOUN
ajst-1488	118	16	&	&	CCONJ
ajst-1488	118	17	science	science	PROPN
ajst-1488	118	18	&	&	CCONJ
ajst-1488	118	19	technology	technology	PROPN
ajst-1488	118	20	,	,	PUNCT
ajst-1488	118	21	2021(02	2021(02	NUM
ajst-1488	118	22	):	):	PUNCT
ajst-1488	118	23	33	33	NUM
ajst-1488	118	24	-	-	SYM
ajst-1488	118	25	35	35	NUM
ajst-1488	118	26	.	.	PUNCT
ajst-1488	119	1	[	[	X
ajst-1488	119	2	7	7	X
ajst-1488	119	3	]	]	X
ajst-1488	119	4	xin	xin	PROPN
ajst-1488	119	5	rong	rong	PROPN
ajst-1488	119	6	,	,	PUNCT
ajst-1488	119	7	hongwu	hongwu	PROPN
ajst-1488	119	8	zhu	zhu	PROPN
ajst-1488	119	9	,	,	PUNCT
ajst-1488	119	10	and	and	CCONJ
ajst-1488	119	11	bingchuan	bingchuan	PROPN
ajst-1488	119	12	chu	chu	PROPN
ajst-1488	119	13	,	,	PUNCT
ajst-1488	119	14	study	study	NOUN
ajst-1488	119	15	on	on	ADP
ajst-1488	119	16	the	the	DET
ajst-1488	119	17	erosion	erosion	NOUN
ajst-1488	119	18	model	model	NOUN
ajst-1488	119	19	of	of	ADP
ajst-1488	119	20	underwater	underwater	ADJ
ajst-1488	119	21	tree	tree	NOUN
ajst-1488	119	22	aisi	aisi	PROPN
ajst-1488	119	23	8630	8630	NUM
ajst-1488	119	24	material	material	NOUN
ajst-1488	119	25	,	,	PUNCT
ajst-1488	119	26	china	china	PROPN
ajst-1488	119	27	petroleum	petroleum	NOUN
ajst-1488	119	28	machinery	machinery	NOUN
ajst-1488	119	29	,	,	PUNCT
ajst-1488	119	30	2020	2020	NUM
ajst-1488	119	31	,	,	PUNCT
ajst-1488	119	32	48(11	48(11	NUM
ajst-1488	119	33	):	):	PUNCT
ajst-1488	119	34	27	27	NUM
ajst-1488	119	35	-	-	SYM
ajst-1488	119	36	35	35	NUM
ajst-1488	119	37	.	.	PUNCT
ajst-1488	120	1	[	[	X
ajst-1488	120	2	8	8	NUM
ajst-1488	120	3	]	]	X
ajst-1488	120	4	gong	gong	NOUN
ajst-1488	120	5	tian	tian	PROPN
ajst-1488	120	6	,	,	PUNCT
ajst-1488	120	7	breakthroughs	breakthrough	NOUN
ajst-1488	120	8	in	in	ADP
ajst-1488	120	9	key	key	ADJ
ajst-1488	120	10	technologies	technology	NOUN
ajst-1488	120	11	of	of	ADP
ajst-1488	120	12	continuous	continuous	ADJ
ajst-1488	120	13	pipe	pipe	NOUN
ajst-1488	120	14	manufacturing	manufacturing	NOUN
ajst-1488	120	15	in	in	ADP
ajst-1488	120	16	baoji	baoji	PROPN
ajst-1488	120	17	steel	steel	PROPN
ajst-1488	120	18	pipe	pipe	PROPN
ajst-1488	120	19	co.	co.	PROPN
ajst-1488	120	20	,	,	PUNCT
ajst-1488	120	21	ltd	ltd	PROPN
ajst-1488	120	22	,	,	PUNCT
ajst-1488	120	23	natural	natural	ADJ
ajst-1488	120	24	gas	gas	NOUN
ajst-1488	120	25	industry	industry	NOUN
ajst-1488	120	26	,	,	PUNCT
ajst-1488	120	27	2013	2013	NUM
ajst-1488	120	28	,	,	PUNCT
ajst-1488	120	29	33(03	33(03	NUM
ajst-1488	120	30	):	):	PUNCT
ajst-1488	120	31	106	106	NUM
ajst-1488	120	32	.	.	PUNCT
ajst-1488	121	1	[	[	X
ajst-1488	121	2	9	9	NUM
ajst-1488	121	3	]	]	X
ajst-1488	121	4	guoqing	guoqe	VERB
ajst-1488	121	5	han	han	PROPN
ajst-1488	121	6	,	,	PUNCT
ajst-1488	121	7	junjian	junjian	PROPN
ajst-1488	121	8	li	li	PROPN
ajst-1488	121	9	,	,	PUNCT
ajst-1488	121	10	and	and	CCONJ
ajst-1488	121	11	yichen	yichen	ADV
ajst-1488	121	12	tao	tao	PROPN
ajst-1488	121	13	,	,	PUNCT
ajst-1488	121	14	practice	practice	NOUN
ajst-1488	121	15	and	and	CCONJ
ajst-1488	121	16	exploration	exploration	NOUN
ajst-1488	121	17	of	of	ADP
ajst-1488	121	18	blended	blended	ADJ
ajst-1488	121	19	education	education	NOUN
ajst-1488	121	20	teaching	teaching	NOUN
ajst-1488	121	21	of	of	ADP
ajst-1488	121	22	major	major	ADJ
ajst-1488	121	23	main	main	ADJ
ajst-1488	121	24	courses	course	NOUN
ajst-1488	121	25	in	in	ADP
ajst-1488	121	26	colleges	college	NOUN
ajst-1488	121	27	and	and	CCONJ
ajst-1488	121	28	universities	university	NOUN
ajst-1488	121	29	:	:	PUNCT
ajst-1488	121	30	a	a	DET
ajst-1488	121	31	case	case	NOUN
ajst-1488	121	32	study	study	NOUN
ajst-1488	121	33	of	of	ADP
ajst-1488	121	34	oil	oil	NOUN
ajst-1488	121	35	production	production	NOUN
ajst-1488	121	36	engineering	engineering	NOUN
ajst-1488	121	37	of	of	ADP
ajst-1488	121	38	china	china	PROPN
ajst-1488	121	39	university	university	PROPN
ajst-1488	121	40	of	of	ADP
ajst-1488	121	41	petroleum	petroleum	NOUN
ajst-1488	121	42	(	(	PUNCT
ajst-1488	121	43	beijing	beijing	PROPN
ajst-1488	121	44	)	)	PUNCT
ajst-1488	121	45	,	,	PUNCT
ajst-1488	121	46	education	education	NOUN
ajst-1488	121	47	and	and	CCONJ
ajst-1488	121	48	teaching	teaching	NOUN
ajst-1488	121	49	forum	forum	NOUN
ajst-1488	121	50	,	,	PUNCT
ajst-1488	121	51	2017(50	2017(50	NOUN
ajst-1488	121	52	):	):	PUNCT
ajst-1488	121	53	101	101	NUM
ajst-1488	121	54	-	-	SYM
ajst-1488	121	55	102	102	NUM
ajst-1488	121	56	.	.	PUNCT
ajst-1488	122	1	[	[	X
ajst-1488	122	2	10	10	NUM
ajst-1488	122	3	]	]	PUNCT
ajst-1488	122	4	energy	energy	NOUN
ajst-1488	122	5	;	;	PUNCT
ajst-1488	122	6	findings	finding	NOUN
ajst-1488	122	7	from	from	ADP
ajst-1488	122	8	beijing	beijing	PROPN
ajst-1488	122	9	jiaotong	jiaotong	PROPN
ajst-1488	122	10	university	university	PROPN
ajst-1488	122	11	yields	yield	VERB
ajst-1488	122	12	new	new	ADJ
ajst-1488	122	13	data	datum	NOUN
ajst-1488	122	14	on	on	ADP
ajst-1488	122	15	energy	energy	NOUN
ajst-1488	122	16	(	(	PUNCT
ajst-1488	122	17	global	global	ADJ
ajst-1488	122	18	crude	crude	ADJ
ajst-1488	122	19	oil	oil	NOUN
ajst-1488	122	20	price	price	NOUN
ajst-1488	122	21	prediction	prediction	NOUN
ajst-1488	122	22	and	and	CCONJ
ajst-1488	122	23	synchronization	synchronization	NOUN
ajst-1488	122	24	based	base	VERB
ajst-1488	122	25	accuracy	accuracy	NOUN
ajst-1488	122	26	evaluation	evaluation	NOUN
ajst-1488	122	27	using	use	VERB
ajst-1488	122	28	random	random	ADJ
ajst-1488	122	29	wavelet	wavelet	NOUN
ajst-1488	122	30	neural	neural	ADJ
ajst-1488	122	31	network	network	NOUN
ajst-1488	122	32	)	)	PUNCT
ajst-1488	122	33	,	,	PUNCT
ajst-1488	122	34	energy	energy	NOUN
ajst-1488	122	35	weekly	weekly	NOUN
ajst-1488	122	36	news,2018	news,2018	NOUN
ajst-1488	122	37	.	.	PUNCT
ajst-1488	123	1	[	[	X
ajst-1488	123	2	11	11	NUM
ajst-1488	123	3	]	]	X
ajst-1488	123	4	guangfei	guangfei	PROPN
ajst-1488	123	5	li	li	PROPN
ajst-1488	123	6	,	,	PUNCT
ajst-1488	123	7	lei	lei	PROPN
ajst-1488	123	8	li	li	PROPN
ajst-1488	123	9	,	,	PUNCT
ajst-1488	123	10	wenxiao	wenxiao	PROPN
ajst-1488	123	11	liu	liu	PROPN
ajst-1488	123	12	,	,	PUNCT
ajst-1488	123	13	yiping	yip	VERB
ajst-1488	123	14	li	li	PROPN
ajst-1488	123	15	,	,	PUNCT
ajst-1488	123	16	and	and	CCONJ
ajst-1488	123	17	bofang	bofang	PROPN
ajst-1488	123	18	wang	wang	PROPN
ajst-1488	123	19	,	,	PUNCT
ajst-1488	123	20	simulation	simulation	NOUN
ajst-1488	123	21	of	of	ADP
ajst-1488	123	22	underwater	underwater	ADJ
ajst-1488	123	23	tree	tree	NOUN
ajst-1488	123	24	composite	composite	ADJ
ajst-1488	123	25	electrohydraulic	electrohydraulic	NOUN
ajst-1488	123	26	control	control	NOUN
ajst-1488	123	27	system	system	NOUN
ajst-1488	123	28	,	,	PUNCT
ajst-1488	123	29	china	china	PROPN
ajst-1488	123	30	petroleum	petroleum	NOUN
ajst-1488	123	31	machinery	machinery	NOUN
ajst-1488	123	32	,	,	PUNCT
ajst-1488	123	33	2017	2017	NUM
ajst-1488	123	34	,	,	PUNCT
ajst-1488	123	35	45(02	45(02	PROPN
ajst-1488	123	36	):	):	PUNCT
ajst-1488	123	37	54	54	NUM
ajst-1488	123	38	-	-	SYM
ajst-1488	123	39	58	58	NUM
ajst-1488	123	40	.	.	PUNCT
ajst-1488	124	1	[	[	X
ajst-1488	124	2	12	12	NUM
ajst-1488	124	3	]	]	X
ajst-1488	124	4	zhaojun	zhaojun	PROPN
ajst-1488	124	5	mao	mao	PROPN
ajst-1488	124	6	,	,	PUNCT
ajst-1488	124	7	deep	deep	ADJ
ajst-1488	124	8	-	-	PUNCT
ajst-1488	124	9	sea	sea	NOUN
ajst-1488	124	10	development	development	NOUN
ajst-1488	124	11	-	-	PUNCT
ajst-1488	124	12	interview	interview	NOUN
ajst-1488	124	13	with	with	ADP
ajst-1488	124	14	deep	deep	ADJ
ajst-1488	124	15	-	-	PUNCT
ajst-1488	124	16	sea	sea	NOUN
ajst-1488	124	17	engineering	engineering	NOUN
ajst-1488	124	18	expert	expert	PROPN
ajst-1488	124	19	duan	duan	PROPN
ajst-1488	124	20	menglan	menglan	PROPN
ajst-1488	124	21	,	,	PUNCT
ajst-1488	124	22	chinese	chinese	ADJ
ajst-1488	124	23	oil	oil	NOUN
ajst-1488	124	24	and	and	CCONJ
ajst-1488	124	25	petrochemical	petrochemical	NOUN
ajst-1488	124	26	,	,	PUNCT
ajst-1488	124	27	2007	2007	NUM
ajst-1488	124	28	(	(	PUNCT
ajst-1488	124	29	06	06	NUM
ajst-1488	124	30	)	)	PUNCT
ajst-1488	124	31	:	:	PUNCT
ajst-1488	124	32	67	67	NUM
ajst-1488	124	33	-	-	SYM
ajst-1488	124	34	69	69	NUM
ajst-1488	124	35	.	.	PUNCT
ajst-1488	125	1	[	[	X
ajst-1488	125	2	13	13	NUM
ajst-1488	125	3	]	]	PUNCT
ajst-1488	125	4	qinwei	qinwei	PROPN
ajst-1488	125	5	chen	chen	PROPN
ajst-1488	125	6	,	,	PUNCT
ajst-1488	125	7	shichao	shichao	PROPN
ajst-1488	125	8	zhang	zhang	PROPN
ajst-1488	125	9	,	,	PUNCT
ajst-1488	125	10	zhijie	zhijie	PROPN
ajst-1488	125	11	he	he	PRON
ajst-1488	125	12	,	,	PUNCT
ajst-1488	125	13	shichao	shichao	NOUN
ajst-1488	125	14	du	du	PROPN
ajst-1488	125	15	,	,	PUNCT
ajst-1488	125	16	and	and	CCONJ
ajst-1488	125	17	jingzheng	jingzheng	PROPN
ajst-1488	125	18	wu	wu	PROPN
ajst-1488	125	19	,	,	PUNCT
ajst-1488	125	20	reliability	reliability	NOUN
ajst-1488	125	21	assessment	assessment	NOUN
ajst-1488	125	22	of	of	ADP
ajst-1488	125	23	offshore	offshore	ADJ
ajst-1488	125	24	tree	tree	NOUN
ajst-1488	125	25	based	base	VERB
ajst-1488	125	26	on	on	ADP
ajst-1488	125	27	failure	failure	NOUN
ajst-1488	125	28	rate	rate	NOUN
ajst-1488	125	29	analysis	analysis	NOUN
ajst-1488	125	30	,	,	PUNCT
ajst-1488	125	31	petroleum	petroleum	NOUN
ajst-1488	125	32	industry	industry	NOUN
ajst-1488	125	33	technical	technical	ADJ
ajst-1488	125	34	supervision	supervision	NOUN
ajst-1488	125	35	,	,	PUNCT
ajst-1488	125	36	2019	2019	NUM
ajst-1488	125	37	,	,	PUNCT
ajst-1488	125	38	35(10	35(10	NUM
ajst-1488	125	39	):	):	PUNCT
ajst-1488	125	40	14	14	NUM
ajst-1488	125	41	-	-	SYM
ajst-1488	125	42	17	17	NUM
ajst-1488	125	43	.	.	PUNCT
ajst-1488	126	1	[	[	X
ajst-1488	126	2	14	14	NUM
ajst-1488	126	3	]	]	X
ajst-1488	126	4	honggang	honggang	PROPN
ajst-1488	126	5	chang	chang	PROPN
ajst-1488	126	6	and	and	CCONJ
ajst-1488	126	7	jiqin	jiqin	PROPN
ajst-1488	126	8	duan	duan	PROPN
ajst-1488	126	9	,	,	PUNCT
ajst-1488	126	10	natural	natural	ADJ
ajst-1488	126	11	gas	gas	NOUN
ajst-1488	126	12	metering	metering	NOUN
ajst-1488	126	13	technologies	technology	NOUN
ajst-1488	126	14	and	and	CCONJ
ajst-1488	126	15	prospects	prospect	NOUN
ajst-1488	126	16	in	in	ADP
ajst-1488	126	17	china	china	PROPN
ajst-1488	126	18	,	,	PUNCT
ajst-1488	126	19	natural	natural	ADJ
ajst-1488	126	20	gas	gas	NOUN
ajst-1488	126	21	industry	industry	NOUN
ajst-1488	126	22	,	,	PUNCT
ajst-1488	126	23	2020	2020	NUM
ajst-1488	126	24	,	,	PUNCT
ajst-1488	126	25	40(01	40(01	NUM
ajst-1488	126	26	):	):	PUNCT
ajst-1488	126	27	110	110	NUM
ajst-1488	126	28	-	-	SYM
ajst-1488	126	29	118	118	NUM
ajst-1488	126	30	.	.	PUNCT
ajst-1488	127	1	[	[	X
ajst-1488	127	2	15	15	NUM
ajst-1488	127	3	]	]	X
ajst-1488	127	4	jie	jie	PROPN
ajst-1488	127	5	wang	wang	PROPN
ajst-1488	127	6	,	,	PUNCT
ajst-1488	127	7	shun	shun	PROPN
ajst-1488	127	8	cheng	cheng	PROPN
ajst-1488	127	9	,	,	PUNCT
ajst-1488	127	10	song	song	PROPN
ajst-1488	127	11	liu	liu	PROPN
ajst-1488	127	12	,	,	PUNCT
ajst-1488	127	13	fusheng	fusheng	PROPN
ajst-1488	127	14	ouyang	ouyang	PROPN
ajst-1488	127	15	,	,	PUNCT
ajst-1488	127	16	and	and	CCONJ
ajst-1488	127	17	mingyang	mingyang	PROPN
ajst-1488	127	18	zhao	zhao	PROPN
ajst-1488	127	19	,	,	PUNCT
ajst-1488	127	20	study	study	NOUN
ajst-1488	127	21	on	on	ADP
ajst-1488	127	22	the	the	DET
ajst-1488	127	23	clustering	clustering	NOUN
ajst-1488	127	24	of	of	ADP
ajst-1488	127	25	raw	raw	ADJ
ajst-1488	127	26	oil	oil	NOUN
ajst-1488	127	27	of	of	ADP
ajst-1488	127	28	s	s	PART
ajst-1488	127	29	zorb	zorb	NOUN
ajst-1488	127	30	device	device	NOUN
ajst-1488	127	31	,	,	PUNCT
ajst-1488	127	32	petroleum	petroleum	NOUN
ajst-1488	127	33	refining	refining	NOUN
ajst-1488	127	34	and	and	CCONJ
ajst-1488	127	35	chemical	chemical	NOUN
ajst-1488	127	36	industry	industry	NOUN
ajst-1488	127	37	,	,	PUNCT
ajst-1488	127	38	2020	2020	NUM
ajst-1488	127	39	,	,	PUNCT
ajst-1488	127	40	51(10	51(10	NUM
ajst-1488	127	41	):	):	PUNCT
ajst-1488	127	42	94	94	NUM
ajst-1488	127	43	-	-	SYM
ajst-1488	127	44	99	99	NUM
ajst-1488	127	45	.	.	PUNCT
ajst-1488	128	1	[	[	X
ajst-1488	128	2	16	16	NUM
ajst-1488	128	3	]	]	X
ajst-1488	128	4	chao	chao	PROPN
ajst-1488	128	5	liu	liu	PROPN
ajst-1488	128	6	,	,	PUNCT
ajst-1488	128	7	jian	jian	PROPN
ajst-1488	128	8	liu	liu	PROPN
ajst-1488	128	9	,	,	PUNCT
ajst-1488	128	10	yuankun	yuankun	PROPN
ajst-1488	128	11	zhu	zhu	PROPN
ajst-1488	128	12	,	,	PUNCT
ajst-1488	128	13	junguo	junguo	PROPN
ajst-1488	128	14	cui	cui	PROPN
ajst-1488	128	15	,	,	PUNCT
ajst-1488	128	16	and	and	CCONJ
ajst-1488	128	17	wensheng	wensheng	PROPN
ajst-1488	128	18	xiao	xiao	PROPN
ajst-1488	128	19	,	,	PUNCT
ajst-1488	128	20	risk	risk	VERB
ajst-1488	128	21	analysis	analysis	NOUN
ajst-1488	128	22	of	of	ADP
ajst-1488	128	23	tubing	tubing	NOUN
ajst-1488	128	24	installation	installation	NOUN
ajst-1488	128	25	based	base	VERB
ajst-1488	128	26	on	on	ADP
ajst-1488	128	27	fuzzy	fuzzy	ADJ
ajst-1488	128	28	bayesian	bayesian	NOUN
ajst-1488	128	29	network	network	NOUN
ajst-1488	128	30	,	,	PUNCT
ajst-1488	128	31	china	china	PROPN
ajst-1488	128	32	petroleum	petroleum	NOUN
ajst-1488	128	33	machinery	machinery	NOUN
ajst-1488	128	34	,	,	PUNCT
ajst-1488	128	35	2020	2020	NUM
ajst-1488	128	36	,	,	PUNCT
ajst-1488	128	37	48(10	48(10	NUM
ajst-1488	128	38	):	):	PUNCT
ajst-1488	128	39	71	71	NUM
ajst-1488	128	40	-	-	SYM
ajst-1488	128	41	77	77	NUM
ajst-1488	128	42	.	.	PUNCT
ajst-1488	129	1	[	[	X
ajst-1488	129	2	17	17	NUM
ajst-1488	129	3	]	]	X
ajst-1488	129	4	chao	chao	PROPN
ajst-1488	129	5	liu	liu	PROPN
ajst-1488	129	6	,	,	PUNCT
ajst-1488	129	7	jian	jian	PROPN
ajst-1488	129	8	liu	liu	PROPN
ajst-1488	129	9	,	,	PUNCT
ajst-1488	129	10	yuankun	yuankun	PROPN
ajst-1488	129	11	zhu	zhu	PROPN
ajst-1488	129	12	,	,	PUNCT
ajst-1488	129	13	quan	quan	PROPN
ajst-1488	129	14	li	li	PROPN
ajst-1488	129	15	,	,	PUNCT
ajst-1488	129	16	and	and	CCONJ
ajst-1488	129	17	wensheng	wensheng	PROPN
ajst-1488	129	18	xiao	xiao	PROPN
ajst-1488	129	19	,	,	PUNCT
ajst-1488	129	20	reliability	reliability	NOUN
ajst-1488	129	21	analysis	analysis	NOUN
ajst-1488	129	22	of	of	ADP
ajst-1488	129	23	underwater	underwater	ADJ
ajst-1488	129	24	tree	tree	NOUN
ajst-1488	129	25	system	system	NOUN
ajst-1488	129	26	based	base	VERB
ajst-1488	129	27	on	on	ADP
ajst-1488	129	28	markov	markov	NOUN
ajst-1488	129	29	process	process	NOUN
ajst-1488	129	30	,	,	PUNCT
ajst-1488	129	31	journal	journal	NOUN
ajst-1488	129	32	of	of	ADP
ajst-1488	129	33	xi	xi	PROPN
ajst-1488	129	34	'	'	PUNCT
ajst-1488	129	35	an	an	DET
ajst-1488	129	36	shiyou	shiyou	PROPN
ajst-1488	129	37	university	university	NOUN
ajst-1488	129	38	(	(	PUNCT
ajst-1488	129	39	natural	natural	ADJ
ajst-1488	129	40	science	science	NOUN
ajst-1488	129	41	edition	edition	NOUN
ajst-1488	129	42	)	)	PUNCT
ajst-1488	129	43	,	,	PUNCT
ajst-1488	129	44	2019	2019	NUM
ajst-1488	129	45	,	,	PUNCT
ajst-1488	129	46	34(05	34(05	NUM
ajst-1488	129	47	):	):	PUNCT
ajst-1488	129	48	91	91	NUM
ajst-1488	129	49	-	-	SYM
ajst-1488	129	50	96	96	NUM
ajst-1488	129	51	+	+	NOUN
ajst-1488	129	52	115	115	NUM
ajst-1488	129	53	.	.	PUNCT
ajst-1488	130	1	[	[	X
ajst-1488	130	2	18	18	NUM
ajst-1488	130	3	]	]	PUNCT
ajst-1488	130	4	weiguo	weiguo	PROPN
ajst-1488	130	5	zhang	zhang	PROPN
ajst-1488	130	6	,	,	PUNCT
ajst-1488	130	7	yong	yong	PROPN
ajst-1488	130	8	li	li	PROPN
ajst-1488	130	9	,	,	PUNCT
ajst-1488	130	10	and	and	CCONJ
ajst-1488	130	11	hao	hao	PROPN
ajst-1488	130	12	jin	jin	PROPN
ajst-1488	130	13	,	,	PUNCT
ajst-1488	130	14	comparative	comparative	ADJ
ajst-1488	130	15	analysis	analysis	NOUN
ajst-1488	130	16	of	of	ADP
ajst-1488	130	17	underwater	underwater	ADJ
ajst-1488	130	18	tree	tree	NOUN
ajst-1488	130	19	installation	installation	NOUN
ajst-1488	130	20	methods	method	NOUN
ajst-1488	130	21	in	in	ADP
ajst-1488	130	22	500	500	NUM
ajst-1488	130	23	m	m	NOUN
ajst-1488	130	24	depth	depth	NOUN
ajst-1488	130	25	,	,	PUNCT
ajst-1488	130	26	china	china	PROPN
ajst-1488	130	27	petroleum	petroleum	NOUN
ajst-1488	130	28	machinery	machinery	NOUN
ajst-1488	130	29	,	,	PUNCT
ajst-1488	130	30	2020	2020	NUM
ajst-1488	130	31	,	,	PUNCT
ajst-1488	130	32	48(08	48(08	NUM
ajst-1488	130	33	):	):	PUNCT
ajst-1488	130	34	62	62	NUM
ajst-1488	130	35	-	-	SYM
ajst-1488	130	36	68	68	NUM
ajst-1488	130	37	+	+	NOUN
ajst-1488	130	38	84	84	NUM
ajst-1488	130	39	.	.	PUNCT