id	sid	tid	token	lemma	pos
ajst-8276	1	1	academic	academic	ADJ
ajst-8276	1	2	journal	journal	NOUN
ajst-8276	1	3	of	of	ADP
ajst-8276	1	4	science	science	NOUN
ajst-8276	1	5	and	and	CCONJ
ajst-8276	1	6	technology	technology	NOUN
ajst-8276	1	7	issn	issn	NOUN
ajst-8276	1	8	:	:	PUNCT
ajst-8276	1	9	2771	2771	NUM
ajst-8276	1	10	-	-	SYM
ajst-8276	1	11	3032	3032	NUM
ajst-8276	1	12	|	|	NOUN
ajst-8276	1	13	vol	vol	NOUN
ajst-8276	1	14	.	.	PROPN
ajst-8276	2	1	6	6	NUM
ajst-8276	2	2	,	,	PUNCT
ajst-8276	2	3	no	no	INTJ
ajst-8276	2	4	.	.	NOUN
ajst-8276	2	5	1	1	NUM
ajst-8276	2	6	,	,	PUNCT
ajst-8276	2	7	2023	2023	NUM
ajst-8276	2	8	22	22	NUM
ajst-8276	2	9	study	study	NOUN
ajst-8276	2	10	on	on	ADP
ajst-8276	2	11	the	the	DET
ajst-8276	2	12	attenuation	attenuation	NOUN
ajst-8276	2	13	of	of	ADP
ajst-8276	2	14	acoustic	acoustic	ADJ
ajst-8276	2	15	emission	emission	NOUN
ajst-8276	2	16	signals	signal	NOUN
ajst-8276	2	17	from	from	ADP
ajst-8276	2	18	plastic	plastic	ADJ
ajst-8276	2	19	pipes	pipe	NOUN
ajst-8276	2	20	xun	xun	PROPN
ajst-8276	3	1	he	he	PRON
ajst-8276	3	2	,	,	PUNCT
ajst-8276	3	3	jun	jun	PROPN
ajst-8276	3	4	li	li	PROPN
ajst-8276	3	5	school	school	PROPN
ajst-8276	3	6	of	of	ADP
ajst-8276	3	7	mechanical	mechanical	ADJ
ajst-8276	3	8	engineering	engineering	NOUN
ajst-8276	3	9	,	,	PUNCT
ajst-8276	3	10	sichuan	sichuan	PROPN
ajst-8276	3	11	university	university	PROPN
ajst-8276	3	12	of	of	ADP
ajst-8276	3	13	light	light	ADJ
ajst-8276	3	14	chemical	chemical	NOUN
ajst-8276	3	15	industry	industry	NOUN
ajst-8276	3	16	,	,	PUNCT
ajst-8276	3	17	zigong	zigong	PROPN
ajst-8276	3	18	643000	643000	NUM
ajst-8276	3	19	,	,	PUNCT
ajst-8276	3	20	china	china	PROPN
ajst-8276	3	21	abstract	abstract	NOUN
ajst-8276	3	22	:	:	PUNCT
ajst-8276	3	23	buried	bury	VERB
ajst-8276	3	24	plastic	plastic	NOUN
ajst-8276	3	25	gas	gas	NOUN
ajst-8276	3	26	pipelines	pipeline	NOUN
ajst-8276	3	27	are	be	AUX
ajst-8276	3	28	widely	widely	ADV
ajst-8276	3	29	used	use	VERB
ajst-8276	3	30	and	and	CCONJ
ajst-8276	3	31	have	have	VERB
ajst-8276	3	32	high	high	ADJ
ajst-8276	3	33	safety	safety	NOUN
ajst-8276	3	34	requirements	requirement	NOUN
ajst-8276	3	35	,	,	PUNCT
ajst-8276	3	36	so	so	SCONJ
ajst-8276	3	37	research	research	NOUN
ajst-8276	3	38	into	into	ADP
ajst-8276	3	39	leak	leak	NOUN
ajst-8276	3	40	monitoring	monitoring	NOUN
ajst-8276	3	41	techniques	technique	NOUN
ajst-8276	3	42	has	have	AUX
ajst-8276	3	43	been	be	AUX
ajst-8276	3	44	of	of	ADP
ajst-8276	3	45	considerable	considerable	ADJ
ajst-8276	3	46	interest	interest	NOUN
ajst-8276	3	47	.	.	PUNCT
ajst-8276	4	1	this	this	DET
ajst-8276	4	2	paper	paper	NOUN
ajst-8276	4	3	combines	combine	VERB
ajst-8276	4	4	theoretical	theoretical	ADJ
ajst-8276	4	5	and	and	CCONJ
ajst-8276	4	6	experimental	experimental	ADJ
ajst-8276	4	7	studies	study	NOUN
ajst-8276	4	8	of	of	ADP
ajst-8276	4	9	the	the	DET
ajst-8276	4	10	attenuation	attenuation	NOUN
ajst-8276	4	11	characteristics	characteristic	NOUN
ajst-8276	4	12	of	of	ADP
ajst-8276	4	13	plastic	plastic	ADJ
ajst-8276	4	14	pipe	pipe	NOUN
ajst-8276	4	15	leakage	leakage	NOUN
ajst-8276	4	16	acoustic	acoustic	ADJ
ajst-8276	4	17	emission	emission	NOUN
ajst-8276	4	18	signals	signal	NOUN
ajst-8276	4	19	to	to	PART
ajst-8276	4	20	provide	provide	VERB
ajst-8276	4	21	technical	technical	ADJ
ajst-8276	4	22	support	support	NOUN
ajst-8276	4	23	for	for	ADP
ajst-8276	4	24	the	the	DET
ajst-8276	4	25	use	use	NOUN
ajst-8276	4	26	of	of	ADP
ajst-8276	4	27	acoustic	acoustic	ADJ
ajst-8276	4	28	emission	emission	NOUN
ajst-8276	4	29	technology	technology	NOUN
ajst-8276	4	30	to	to	PART
ajst-8276	4	31	monitor	monitor	VERB
ajst-8276	4	32	plastic	plastic	ADJ
ajst-8276	4	33	pipe	pipe	NOUN
ajst-8276	4	34	leakage	leakage	NOUN
ajst-8276	4	35	and	and	CCONJ
ajst-8276	4	36	failure	failure	NOUN
ajst-8276	4	37	.	.	PUNCT
ajst-8276	5	1	keywords	keyword	NOUN
ajst-8276	5	2	:	:	PUNCT
ajst-8276	5	3	plastic	plastic	ADJ
ajst-8276	5	4	pipes	pipe	NOUN
ajst-8276	5	5	,	,	PUNCT
ajst-8276	5	6	attenuation	attenuation	NOUN
ajst-8276	5	7	characteristics	characteristic	NOUN
ajst-8276	5	8	,	,	PUNCT
ajst-8276	5	9	acoustic	acoustic	ADJ
ajst-8276	5	10	emission	emission	NOUN
ajst-8276	5	11	techniques	technique	NOUN
ajst-8276	5	12	.	.	PUNCT
ajst-8276	6	1	1	1	X
ajst-8276	6	2	.	.	X
ajst-8276	6	3	introduction	introduction	NOUN
ajst-8276	6	4	china	china	PROPN
ajst-8276	6	5	's	's	PART
ajst-8276	6	6	urban	urban	ADJ
ajst-8276	6	7	energy	energy	NOUN
ajst-8276	6	8	use	use	NOUN
ajst-8276	6	9	has	have	AUX
ajst-8276	6	10	entered	enter	VERB
ajst-8276	6	11	the	the	DET
ajst-8276	6	12	era	era	NOUN
ajst-8276	6	13	of	of	ADP
ajst-8276	6	14	natural	natural	ADJ
ajst-8276	6	15	gas	gas	NOUN
ajst-8276	6	16	,	,	PUNCT
ajst-8276	6	17	and	and	CCONJ
ajst-8276	6	18	on	on	ADP
ajst-8276	6	19	20	20	NUM
ajst-8276	6	20	may	may	PROPN
ajst-8276	6	21	2021	2021	NUM
ajst-8276	6	22	petrochina	petrochina	NOUN
ajst-8276	6	23	released	release	VERB
ajst-8276	6	24	its	its	PRON
ajst-8276	6	25	2020	2020	NUM
ajst-8276	6	26	csr	csr	NOUN
ajst-8276	6	27	report	report	NOUN
ajst-8276	6	28	,	,	PUNCT
ajst-8276	6	29	which	which	PRON
ajst-8276	6	30	shows	show	VERB
ajst-8276	6	31	that	that	SCONJ
ajst-8276	6	32	in	in	ADP
ajst-8276	6	33	2020	2020	NUM
ajst-8276	6	34	petrochina	petrochina	NOUN
ajst-8276	6	35	's	's	PART
ajst-8276	6	36	domestic	domestic	ADJ
ajst-8276	6	37	natural	natural	ADJ
ajst-8276	6	38	gas	gas	NOUN
ajst-8276	6	39	production	production	NOUN
ajst-8276	6	40	exceeds	exceed	VERB
ajst-8276	6	41	130	130	NUM
ajst-8276	6	42	billion	billion	NUM
ajst-8276	6	43	cubic	cubic	ADJ
ajst-8276	6	44	metres	metre	NOUN
ajst-8276	6	45	,	,	PUNCT
ajst-8276	6	46	with	with	ADP
ajst-8276	6	47	natural	natural	ADJ
ajst-8276	6	48	gas	gas	NOUN
ajst-8276	6	49	accounting	accounting	NOUN
ajst-8276	6	50	for	for	ADP
ajst-8276	6	51	more	more	ADJ
ajst-8276	6	52	than	than	ADP
ajst-8276	6	53	50	50	NUM
ajst-8276	6	54	%	%	NOUN
ajst-8276	6	55	of	of	ADP
ajst-8276	6	56	the	the	DET
ajst-8276	6	57	oil	oil	NOUN
ajst-8276	6	58	and	and	CCONJ
ajst-8276	6	59	gas	gas	NOUN
ajst-8276	6	60	mix	mix	NOUN
ajst-8276	6	61	for	for	ADP
ajst-8276	6	62	the	the	DET
ajst-8276	6	63	first	first	ADJ
ajst-8276	6	64	time	time	NOUN
ajst-8276	6	65	,	,	PUNCT
ajst-8276	6	66	while	while	SCONJ
ajst-8276	6	67	china	china	PROPN
ajst-8276	6	68	's	's	PART
ajst-8276	6	69	overall	overall	ADJ
ajst-8276	6	70	natural	natural	ADJ
ajst-8276	6	71	gas	gas	NOUN
ajst-8276	6	72	production	production	NOUN
ajst-8276	6	73	has	have	AUX
ajst-8276	6	74	increased	increase	VERB
ajst-8276	6	75	from	from	ADP
ajst-8276	6	76	27.7	27.7	NUM
ajst-8276	6	77	billion	billion	NUM
ajst-8276	6	78	cubic	cubic	ADJ
ajst-8276	6	79	metres	metre	NOUN
ajst-8276	6	80	in	in	ADP
ajst-8276	6	81	2000	2000	NUM
ajst-8276	6	82	to	to	ADP
ajst-8276	6	83	188.9	188.9	NUM
ajst-8276	6	84	billion	billion	NUM
ajst-8276	6	85	cubic	cubic	ADJ
ajst-8276	6	86	meters	meter	NOUN
ajst-8276	6	87	,	,	PUNCT
ajst-8276	6	88	an	an	DET
ajst-8276	6	89	increase	increase	NOUN
ajst-8276	6	90	of	of	ADP
ajst-8276	6	91	nearly	nearly	ADV
ajst-8276	6	92	seven	seven	NUM
ajst-8276	6	93	times	time	NOUN
ajst-8276	6	94	,	,	PUNCT
ajst-8276	6	95	with	with	ADP
ajst-8276	6	96	an	an	DET
ajst-8276	6	97	average	average	ADJ
ajst-8276	6	98	annual	annual	ADJ
ajst-8276	6	99	growth	growth	NOUN
ajst-8276	6	100	of	of	ADP
ajst-8276	6	101	10%[1	10%[1	NOUN
ajst-8276	6	102	]	]	PUNCT
ajst-8276	6	103	.	.	PUNCT
ajst-8276	7	1	plastic	plastic	NOUN
ajst-8276	7	2	pipelines	pipeline	NOUN
ajst-8276	7	3	have	have	AUX
ajst-8276	7	4	been	be	AUX
ajst-8276	7	5	widely	widely	ADV
ajst-8276	7	6	used	use	VERB
ajst-8276	7	7	in	in	ADP
ajst-8276	7	8	gas	gas	NOUN
ajst-8276	7	9	transmission	transmission	NOUN
ajst-8276	7	10	and	and	CCONJ
ajst-8276	7	11	distribution	distribution	NOUN
ajst-8276	7	12	networks	network	NOUN
ajst-8276	7	13	in	in	ADP
ajst-8276	7	14	china	china	PROPN
ajst-8276	7	15	due	due	ADP
ajst-8276	7	16	to	to	ADP
ajst-8276	7	17	their	their	PRON
ajst-8276	7	18	remarkable	remarkable	ADJ
ajst-8276	7	19	characteristics	characteristic	NOUN
ajst-8276	7	20	such	such	ADJ
ajst-8276	7	21	as	as	ADP
ajst-8276	7	22	chemical	chemical	ADJ
ajst-8276	7	23	resistance	resistance	NOUN
ajst-8276	7	24	,	,	PUNCT
ajst-8276	7	25	long	long	ADJ
ajst-8276	7	26	life	life	NOUN
ajst-8276	7	27	,	,	PUNCT
ajst-8276	7	28	easy	easy	ADJ
ajst-8276	7	29	construction	construction	NOUN
ajst-8276	7	30	,	,	PUNCT
ajst-8276	7	31	good	good	ADJ
ajst-8276	7	32	impact	impact	NOUN
ajst-8276	7	33	resistance	resistance	NOUN
ajst-8276	7	34	,	,	PUNCT
ajst-8276	7	35	environmental	environmental	ADJ
ajst-8276	7	36	friendliness	friendliness	NOUN
ajst-8276	7	37	,	,	PUNCT
ajst-8276	7	38	easy	easy	ADJ
ajst-8276	7	39	moulding	moulding	NOUN
ajst-8276	7	40	and	and	CCONJ
ajst-8276	7	41	processing	processing	NOUN
ajst-8276	7	42	,	,	PUNCT
ajst-8276	7	43	and	and	CCONJ
ajst-8276	7	44	good	good	ADJ
ajst-8276	7	45	overall	overall	ADJ
ajst-8276	7	46	energy	energy	NOUN
ajst-8276	7	47	efficiency[2	efficiency[2	PROPN
ajst-8276	7	48	]	]	PUNCT
ajst-8276	7	49	.	.	PUNCT
ajst-8276	8	1	as	as	SCONJ
ajst-8276	8	2	most	most	ADJ
ajst-8276	8	3	plastic	plastic	ADJ
ajst-8276	8	4	gas	gas	NOUN
ajst-8276	8	5	pipelines	pipeline	NOUN
ajst-8276	8	6	are	be	AUX
ajst-8276	8	7	buried	bury	VERB
ajst-8276	8	8	underground	underground	ADV
ajst-8276	8	9	in	in	ADP
ajst-8276	8	10	a	a	DET
ajst-8276	8	11	complex	complex	ADJ
ajst-8276	8	12	environment	environment	NOUN
ajst-8276	8	13	,	,	PUNCT
ajst-8276	8	14	with	with	ADP
ajst-8276	8	15	a	a	DET
ajst-8276	8	16	long	long	ADJ
ajst-8276	8	17	period	period	NOUN
ajst-8276	8	18	of	of	ADP
ajst-8276	8	19	time	time	NOUN
ajst-8276	8	20	in	in	ADP
ajst-8276	8	21	use	use	NOUN
ajst-8276	8	22	,	,	PUNCT
ajst-8276	8	23	complex	complex	ADJ
ajst-8276	8	24	and	and	CCONJ
ajst-8276	8	25	varied	varied	ADJ
ajst-8276	8	26	pipeline	pipeline	NOUN
ajst-8276	8	27	problems	problem	NOUN
ajst-8276	8	28	often	often	ADV
ajst-8276	8	29	arise	arise	VERB
ajst-8276	8	30	with	with	ADP
ajst-8276	8	31	the	the	DET
ajst-8276	8	32	growth	growth	NOUN
ajst-8276	8	33	of	of	ADP
ajst-8276	8	34	the	the	DET
ajst-8276	8	35	pipeline	pipeline	NOUN
ajst-8276	8	36	's	's	PART
ajst-8276	8	37	service	service	NOUN
ajst-8276	8	38	life	life	NOUN
ajst-8276	8	39	and	and	CCONJ
ajst-8276	8	40	the	the	DET
ajst-8276	8	41	ageing	ageing	NOUN
ajst-8276	8	42	of	of	ADP
ajst-8276	8	43	the	the	DET
ajst-8276	8	44	pipeline	pipeline	NOUN
ajst-8276	8	45	,	,	PUNCT
ajst-8276	8	46	such	such	ADJ
ajst-8276	8	47	as	as	ADP
ajst-8276	8	48	chemical	chemical	ADJ
ajst-8276	8	49	corrosion	corrosion	NOUN
ajst-8276	8	50	of	of	ADP
ajst-8276	8	51	the	the	DET
ajst-8276	8	52	internal	internal	ADJ
ajst-8276	8	53	surface	surface	NOUN
ajst-8276	8	54	of	of	ADP
ajst-8276	8	55	the	the	DET
ajst-8276	8	56	pipeline	pipeline	NOUN
ajst-8276	8	57	caused	cause	VERB
ajst-8276	8	58	by	by	ADP
ajst-8276	8	59	internal	internal	ADJ
ajst-8276	8	60	media	medium	NOUN
ajst-8276	8	61	,	,	PUNCT
ajst-8276	8	62	perforation	perforation	NOUN
ajst-8276	8	63	leakage	leakage	NOUN
ajst-8276	8	64	,	,	PUNCT
ajst-8276	8	65	weld	weld	NOUN
ajst-8276	8	66	rupture	rupture	NOUN
ajst-8276	8	67	and	and	CCONJ
ajst-8276	8	68	deformation	deformation	NOUN
ajst-8276	8	69	caused	cause	VERB
ajst-8276	8	70	by	by	ADP
ajst-8276	8	71	welding	weld	VERB
ajst-8276	8	72	defects	defect	NOUN
ajst-8276	8	73	and	and	CCONJ
ajst-8276	8	74	mechanical	mechanical	ADJ
ajst-8276	8	75	damage	damage	NOUN
ajst-8276	8	76	caused	cause	VERB
ajst-8276	8	77	by	by	ADP
ajst-8276	8	78	external	external	ADJ
ajst-8276	8	79	interference	interference	NOUN
ajst-8276	8	80	.	.	PUNCT
ajst-8276	9	1	the	the	DET
ajst-8276	9	2	resulting	result	VERB
ajst-8276	9	3	pipeline	pipeline	NOUN
ajst-8276	9	4	accidents	accident	NOUN
ajst-8276	9	5	(	(	PUNCT
ajst-8276	9	6	poisoning	poisoning	NOUN
ajst-8276	9	7	,	,	PUNCT
ajst-8276	9	8	fires	fire	NOUN
ajst-8276	9	9	and	and	CCONJ
ajst-8276	9	10	explosions	explosion	NOUN
ajst-8276	9	11	)	)	PUNCT
ajst-8276	9	12	can	can	AUX
ajst-8276	9	13	lead	lead	VERB
ajst-8276	9	14	to	to	ADP
ajst-8276	9	15	a	a	DET
ajst-8276	9	16	significant	significant	ADJ
ajst-8276	9	17	waste	waste	NOUN
ajst-8276	9	18	of	of	ADP
ajst-8276	9	19	resources	resource	NOUN
ajst-8276	9	20	,	,	PUNCT
ajst-8276	9	21	environmental	environmental	ADJ
ajst-8276	9	22	damage	damage	NOUN
ajst-8276	9	23	and	and	CCONJ
ajst-8276	9	24	loss	loss	NOUN
ajst-8276	9	25	of	of	ADP
ajst-8276	9	26	life	life	NOUN
ajst-8276	9	27	.	.	PUNCT
ajst-8276	10	1	therefore	therefore	ADV
ajst-8276	10	2	,	,	PUNCT
ajst-8276	10	3	for	for	ADP
ajst-8276	10	4	pipeline	pipeline	NOUN
ajst-8276	10	5	leakage	leakage	NOUN
ajst-8276	10	6	monitoring	monitoring	NOUN
ajst-8276	10	7	and	and	CCONJ
ajst-8276	10	8	detection	detection	NOUN
ajst-8276	10	9	is	be	AUX
ajst-8276	10	10	very	very	ADV
ajst-8276	10	11	necessary	necessary	ADJ
ajst-8276	10	12	,	,	PUNCT
ajst-8276	10	13	acoustic	acoustic	ADJ
ajst-8276	10	14	emission	emission	NOUN
ajst-8276	10	15	method	method	NOUN
ajst-8276	10	16	has	have	VERB
ajst-8276	10	17	the	the	DET
ajst-8276	10	18	advantages	advantage	NOUN
ajst-8276	10	19	of	of	ADP
ajst-8276	10	20	being	be	AUX
ajst-8276	10	21	sensitive	sensitive	ADJ
ajst-8276	10	22	to	to	ADP
ajst-8276	10	23	changes	change	NOUN
ajst-8276	10	24	in	in	ADP
ajst-8276	10	25	the	the	DET
ajst-8276	10	26	leakage	leakage	NOUN
ajst-8276	10	27	signal	signal	NOUN
ajst-8276	10	28	,	,	PUNCT
ajst-8276	10	29	high	high	ADJ
ajst-8276	10	30	localization	localization	NOUN
ajst-8276	10	31	accuracy	accuracy	NOUN
ajst-8276	10	32	,	,	PUNCT
ajst-8276	10	33	low	low	ADJ
ajst-8276	10	34	detection	detection	NOUN
ajst-8276	10	35	cost	cost	NOUN
ajst-8276	10	36	and	and	CCONJ
ajst-8276	10	37	strong	strong	ADJ
ajst-8276	10	38	adaptability	adaptability	NOUN
ajst-8276	10	39	,	,	PUNCT
ajst-8276	10	40	etc	etc	X
ajst-8276	10	41	.	.	X
ajst-8276	10	42	,	,	PUNCT
ajst-8276	10	43	and	and	CCONJ
ajst-8276	10	44	is	be	AUX
ajst-8276	10	45	widely	widely	ADV
ajst-8276	10	46	used	use	VERB
ajst-8276	10	47	in	in	ADP
ajst-8276	10	48	pipeline	pipeline	NOUN
ajst-8276	10	49	leakage	leakage	NOUN
ajst-8276	10	50	detection	detection	NOUN
ajst-8276	10	51	and	and	CCONJ
ajst-8276	10	52	monitoring.at	monitoring.at	NOUN
ajst-8276	10	53	present	present	ADJ
ajst-8276	10	54	,	,	PUNCT
ajst-8276	10	55	many	many	ADJ
ajst-8276	10	56	experts	expert	NOUN
ajst-8276	10	57	and	and	CCONJ
ajst-8276	10	58	scholars	scholar	NOUN
ajst-8276	10	59	at	at	ADP
ajst-8276	10	60	home	home	NOUN
ajst-8276	10	61	and	and	CCONJ
ajst-8276	10	62	abroad	abroad	ADV
ajst-8276	10	63	use	use	VERB
ajst-8276	10	64	acoustic	acoustic	ADJ
ajst-8276	10	65	emission	emission	NOUN
ajst-8276	10	66	technology	technology	NOUN
ajst-8276	10	67	to	to	PART
ajst-8276	10	68	carry	carry	VERB
ajst-8276	10	69	out	out	ADP
ajst-8276	10	70	corresponding	correspond	VERB
ajst-8276	10	71	research	research	NOUN
ajst-8276	10	72	on	on	ADP
ajst-8276	10	73	pipeline	pipeline	NOUN
ajst-8276	10	74	leaks	leak	NOUN
ajst-8276	10	75	,	,	PUNCT
ajst-8276	10	76	cruz	cruz	PROPN
ajst-8276	10	77	et	et	PROPN
ajst-8276	10	78	al[3]proposed	al[3]propose	VERB
ajst-8276	10	79	acoustic	acoustic	ADJ
ajst-8276	10	80	emission	emission	NOUN
ajst-8276	10	81	sensor	sensor	NOUN
ajst-8276	10	82	combined	combine	VERB
ajst-8276	10	83	with	with	ADP
ajst-8276	10	84	machine	machine	NOUN
ajst-8276	10	85	learning	learning	NOUN
ajst-8276	10	86	for	for	ADP
ajst-8276	10	87	gas	gas	NOUN
ajst-8276	10	88	pipeline	pipeline	NOUN
ajst-8276	10	89	leak	leak	NOUN
ajst-8276	10	90	location	location	NOUN
ajst-8276	10	91	method	method	NOUN
ajst-8276	10	92	,	,	PUNCT
ajst-8276	10	93	the	the	DET
ajst-8276	10	94	method	method	NOUN
ajst-8276	10	95	can	can	AUX
ajst-8276	10	96	accurately	accurately	ADV
ajst-8276	10	97	detect	detect	VERB
ajst-8276	10	98	small	small	ADJ
ajst-8276	10	99	leaks	leak	NOUN
ajst-8276	10	100	in	in	ADP
ajst-8276	10	101	pipelines	pipeline	NOUN
ajst-8276	10	102	with	with	ADP
ajst-8276	10	103	low	low	ADJ
ajst-8276	10	104	pressure	pressure	NOUN
ajst-8276	10	105	and	and	CCONJ
ajst-8276	10	106	external	external	ADJ
ajst-8276	10	107	interference	interference	NOUN
ajst-8276	10	108	,	,	PUNCT
ajst-8276	10	109	with	with	ADP
ajst-8276	10	110	an	an	DET
ajst-8276	10	111	accuracy	accuracy	NOUN
ajst-8276	10	112	rate	rate	NOUN
ajst-8276	10	113	of	of	ADP
ajst-8276	10	114	99.60	99.60	NUM
ajst-8276	10	115	%	%	NOUN
ajst-8276	10	116	;	;	PUNCT
ajst-8276	10	117	zhang	zhang	PROPN
ajst-8276	10	118	xi	xi	PROPN
ajst-8276	10	119	et	et	PROPN
ajst-8276	10	120	al[4]used	al[4]use	VERB
ajst-8276	10	121	the	the	DET
ajst-8276	10	122	attenuation	attenuation	NOUN
ajst-8276	10	123	characteristics	characteristic	NOUN
ajst-8276	10	124	of	of	ADP
ajst-8276	10	125	acoustic	acoustic	ADJ
ajst-8276	10	126	emission	emission	NOUN
ajst-8276	10	127	waves	wave	NOUN
ajst-8276	10	128	to	to	PART
ajst-8276	10	129	propose	propose	VERB
ajst-8276	10	130	a	a	DET
ajst-8276	10	131	broadband	broadband	NOUN
ajst-8276	10	132	acoustic	acoustic	ADJ
ajst-8276	10	133	emission	emission	NOUN
ajst-8276	10	134	source	source	NOUN
ajst-8276	10	135	the	the	DET
ajst-8276	10	136	threesensor	threesensor	NOUN
ajst-8276	10	137	localization	localization	NOUN
ajst-8276	10	138	model	model	NOUN
ajst-8276	10	139	was	be	AUX
ajst-8276	10	140	used	use	VERB
ajst-8276	10	141	for	for	ADP
ajst-8276	10	142	the	the	DET
ajst-8276	10	143	noise	noise	NOUN
ajst-8276	10	144	that	that	PRON
ajst-8276	10	145	could	could	AUX
ajst-8276	10	146	not	not	PART
ajst-8276	10	147	be	be	AUX
ajst-8276	10	148	completely	completely	ADV
ajst-8276	10	149	eliminated	eliminate	VERB
ajst-8276	10	150	to	to	PART
ajst-8276	10	151	achieve	achieve	VERB
ajst-8276	10	152	a	a	DET
ajst-8276	10	153	high	high	ADJ
ajst-8276	10	154	localization	localization	NOUN
ajst-8276	10	155	accuracy	accuracy	NOUN
ajst-8276	10	156	at	at	ADP
ajst-8276	10	157	low	low	ADJ
ajst-8276	10	158	leakage	leakage	NOUN
ajst-8276	10	159	rates	rate	NOUN
ajst-8276	10	160	.	.	PUNCT
ajst-8276	11	1	as	as	SCONJ
ajst-8276	11	2	plastic	plastic	ADJ
ajst-8276	11	3	pipes	pipe	NOUN
ajst-8276	11	4	are	be	AUX
ajst-8276	11	5	different	different	ADJ
ajst-8276	11	6	from	from	ADP
ajst-8276	11	7	steel	steel	NOUN
ajst-8276	11	8	pipes	pipe	NOUN
ajst-8276	11	9	for	for	ADP
ajst-8276	11	10	acoustic	acoustic	ADJ
ajst-8276	11	11	emission	emission	NOUN
ajst-8276	11	12	signals	signal	NOUN
ajst-8276	11	13	have	have	VERB
ajst-8276	11	14	good	good	ADJ
ajst-8276	11	15	transferability	transferability	NOUN
ajst-8276	11	16	,	,	PUNCT
ajst-8276	11	17	plastic	plastic	ADJ
ajst-8276	11	18	materials	material	NOUN
ajst-8276	11	19	as	as	ADP
ajst-8276	11	20	viscoelastic	viscoelastic	ADJ
ajst-8276	11	21	polymer	polymer	NOUN
ajst-8276	11	22	materials	material	NOUN
ajst-8276	11	23	,	,	PUNCT
ajst-8276	11	24	acoustic	acoustic	ADJ
ajst-8276	11	25	emission	emission	NOUN
ajst-8276	11	26	signal	signal	NOUN
ajst-8276	11	27	propagation	propagation	NOUN
ajst-8276	11	28	in	in	ADP
ajst-8276	11	29	plastic	plastic	ADJ
ajst-8276	11	30	media	medium	NOUN
ajst-8276	11	31	,	,	PUNCT
ajst-8276	11	32	serious	serious	ADJ
ajst-8276	11	33	acoustic	acoustic	ADJ
ajst-8276	11	34	attenuation	attenuation	NOUN
ajst-8276	11	35	and	and	CCONJ
ajst-8276	11	36	acoustic	acoustic	ADJ
ajst-8276	11	37	dispersion	dispersion	NOUN
ajst-8276	11	38	will	will	AUX
ajst-8276	11	39	occur	occur	VERB
ajst-8276	11	40	,	,	PUNCT
ajst-8276	11	41	the	the	DET
ajst-8276	11	42	former	former	ADJ
ajst-8276	11	43	so	so	SCONJ
ajst-8276	11	44	that	that	SCONJ
ajst-8276	11	45	the	the	DET
ajst-8276	11	46	acoustic	acoustic	ADJ
ajst-8276	11	47	energy	energy	NOUN
ajst-8276	11	48	with	with	ADP
ajst-8276	11	49	the	the	DET
ajst-8276	11	50	propagation	propagation	NOUN
ajst-8276	11	51	distance	distance	NOUN
ajst-8276	11	52	is	be	AUX
ajst-8276	11	53	constantly	constantly	ADV
ajst-8276	11	54	reduced	reduce	VERB
ajst-8276	11	55	;	;	PUNCT
ajst-8276	11	56	the	the	DET
ajst-8276	11	57	latter	latter	ADJ
ajst-8276	11	58	due	due	ADP
ajst-8276	11	59	to	to	ADP
ajst-8276	11	60	the	the	DET
ajst-8276	11	61	different	different	ADJ
ajst-8276	11	62	phase	phase	NOUN
ajst-8276	11	63	velocity	velocity	NOUN
ajst-8276	11	64	of	of	ADP
ajst-8276	11	65	different	different	ADJ
ajst-8276	11	66	frequency	frequency	NOUN
ajst-8276	11	67	components	component	NOUN
ajst-8276	11	68	in	in	ADP
ajst-8276	11	69	the	the	DET
ajst-8276	11	70	acoustic	acoustic	ADJ
ajst-8276	11	71	signal	signal	NOUN
ajst-8276	11	72	,	,	PUNCT
ajst-8276	11	73	the	the	DET
ajst-8276	11	74	pulse	pulse	NOUN
ajst-8276	11	75	waveform	waveform	NOUN
ajst-8276	11	76	distortion	distortion	NOUN
ajst-8276	11	77	,	,	PUNCT
ajst-8276	11	78	the	the	DET
ajst-8276	11	79	acoustic	acoustic	ADJ
ajst-8276	11	80	properties	property	NOUN
ajst-8276	11	81	of	of	ADP
ajst-8276	11	82	plastic	plastic	NOUN
ajst-8276	11	83	on	on	ADP
ajst-8276	11	84	the	the	DET
ajst-8276	11	85	acoustic	acoustic	ADJ
ajst-8276	11	86	waveform	waveform	VERB
ajst-8276	11	87	the	the	DET
ajst-8276	11	88	influence	influence	NOUN
ajst-8276	11	89	of	of	ADP
ajst-8276	11	90	the	the	DET
ajst-8276	11	91	acoustic	acoustic	ADJ
ajst-8276	11	92	properties	property	NOUN
ajst-8276	11	93	of	of	ADP
ajst-8276	11	94	plastic	plastic	NOUN
ajst-8276	11	95	on	on	ADP
ajst-8276	11	96	the	the	DET
ajst-8276	11	97	acoustic	acoustic	ADJ
ajst-8276	11	98	waveform	waveform	NOUN
ajst-8276	11	99	accumulates	accumulate	VERB
ajst-8276	11	100	with	with	ADP
ajst-8276	11	101	the	the	DET
ajst-8276	11	102	increase	increase	NOUN
ajst-8276	11	103	of	of	ADP
ajst-8276	11	104	the	the	DET
ajst-8276	11	105	propagation	propagation	NOUN
ajst-8276	11	106	distance[5	distance[5	PROPN
ajst-8276	11	107	]	]	PUNCT
ajst-8276	11	108	,	,	PUNCT
ajst-8276	11	109	so	so	ADV
ajst-8276	11	110	to	to	PART
ajst-8276	11	111	understand	understand	VERB
ajst-8276	11	112	the	the	DET
ajst-8276	11	113	plastic	plastic	ADJ
ajst-8276	11	114	pipe	pipe	NOUN
ajst-8276	11	115	leakage	leakage	NOUN
ajst-8276	11	116	acoustic	acoustic	ADJ
ajst-8276	11	117	emission	emission	NOUN
ajst-8276	11	118	signal	signal	NOUN
ajst-8276	11	119	attenuation	attenuation	NOUN
ajst-8276	11	120	characteristics	characteristic	NOUN
ajst-8276	11	121	of	of	ADP
ajst-8276	11	122	the	the	DET
ajst-8276	11	123	changing	change	VERB
ajst-8276	11	124	law	law	NOUN
ajst-8276	11	125	in	in	ADP
ajst-8276	11	126	order	order	NOUN
ajst-8276	11	127	to	to	PART
ajst-8276	11	128	use	use	VERB
ajst-8276	11	129	it	it	PRON
ajst-8276	11	130	in	in	ADP
ajst-8276	11	131	the	the	DET
ajst-8276	11	132	process	process	NOUN
ajst-8276	11	133	of	of	ADP
ajst-8276	11	134	plastic	plastic	ADJ
ajst-8276	11	135	pipe	pipe	NOUN
ajst-8276	11	136	leakage	leakage	NOUN
ajst-8276	11	137	monitoring	monitoring	NOUN
ajst-8276	11	138	.	.	PUNCT
ajst-8276	12	1	2	2	X
ajst-8276	12	2	.	.	X
ajst-8276	12	3	theoretical	theoretical	ADJ
ajst-8276	12	4	analysis	analysis	NOUN
ajst-8276	12	5	of	of	ADP
ajst-8276	12	6	acoustic	acoustic	ADJ
ajst-8276	12	7	emission	emission	NOUN
ajst-8276	12	8	attenuation	attenuation	NOUN
ajst-8276	12	9	studies	study	NOUN
ajst-8276	12	10	in	in	ADP
ajst-8276	12	11	the	the	DET
ajst-8276	12	12	literature	literature	NOUN
ajst-8276	12	13	have	have	AUX
ajst-8276	12	14	shown	show	VERB
ajst-8276	12	15	that	that	SCONJ
ajst-8276	12	16	the	the	DET
ajst-8276	12	17	amplitude	amplitude	NOUN
ajst-8276	12	18	of	of	ADP
ajst-8276	12	19	the	the	DET
ajst-8276	12	20	acoustic	acoustic	ADJ
ajst-8276	12	21	emission	emission	NOUN
ajst-8276	12	22	signal	signal	NOUN
ajst-8276	12	23	from	from	ADP
ajst-8276	12	24	plastic	plastic	ADJ
ajst-8276	12	25	pipes	pipe	NOUN
ajst-8276	12	26	decays	decay	NOUN
ajst-8276	12	27	approximately	approximately	ADV
ajst-8276	12	28	according	accord	VERB
ajst-8276	12	29	to	to	ADP
ajst-8276	12	30	the	the	DET
ajst-8276	12	31	exponential	exponential	ADJ
ajst-8276	12	32	law	law	NOUN
ajst-8276	12	33	as	as	ADP
ajst-8276	12	34	the	the	DET
ajst-8276	12	35	propagation	propagation	NOUN
ajst-8276	12	36	distance	distance	NOUN
ajst-8276	12	37	increases	increase	NOUN
ajst-8276	12	38	,	,	PUNCT
ajst-8276	12	39	and	and	CCONJ
ajst-8276	12	40	the	the	DET
ajst-8276	12	41	amplitude	amplitude	NOUN
ajst-8276	12	42	decays	decay	VERB
ajst-8276	12	43	with	with	ADP
ajst-8276	12	44	propagation	propagation	NOUN
ajst-8276	12	45	distance	distance	NOUN
ajst-8276	12	46	as	as	SCONJ
ajst-8276	12	47	shown	show	VERB
ajst-8276	12	48	in	in	ADP
ajst-8276	12	49	equation	equation	NOUN
ajst-8276	12	50	(	(	PUNCT
ajst-8276	12	51	1	1	X
ajst-8276	12	52	)	)	PUNCT
ajst-8276	13	1	[	[	X
ajst-8276	13	2	6	6	NUM
ajst-8276	13	3	]	]	PUNCT
ajst-8276	13	4	:	:	PUNCT
ajst-8276	13	5	l	l	X
ajst-8276	13	6	l	l	NOUN
ajst-8276	13	7	ou	ou	X
ajst-8276	13	8	u	u	PROPN
ajst-8276	13	9	e	e	NOUN
ajst-8276	13	10			PROPN
ajst-8276	13	11	(	(	PUNCT
ajst-8276	13	12	1	1	NUM
ajst-8276	13	13	)	)	PUNCT
ajst-8276	13	14	where	where	SCONJ
ajst-8276	13	15	:	:	PUNCT
ajst-8276	13	16	uo	uo	NOUN
ajst-8276	13	17	is	be	AUX
ajst-8276	13	18	the	the	DET
ajst-8276	13	19	initial	initial	ADJ
ajst-8276	13	20	amplitude;ul	amplitude;ul	NOUN
ajst-8276	13	21	is	be	AUX
ajst-8276	13	22	the	the	DET
ajst-8276	13	23	amplitude	amplitude	NOUN
ajst-8276	13	24	at	at	ADP
ajst-8276	13	25	a	a	DET
ajst-8276	13	26	distance	distance	NOUN
ajst-8276	13	27	l	l	NOUN
ajst-8276	13	28	from	from	ADP
ajst-8276	13	29	the	the	DET
ajst-8276	13	30	wave	wave	NOUN
ajst-8276	13	31	source;α	source;α	NOUN
ajst-8276	13	32	is	be	AUX
ajst-8276	13	33	the	the	DET
ajst-8276	13	34	attenuation	attenuation	NOUN
ajst-8276	13	35	coefficient	coefficient	NOUN
ajst-8276	13	36	of	of	ADP
ajst-8276	13	37	the	the	DET
ajst-8276	13	38	medium	medium	NOUN
ajst-8276	13	39	.	.	PUNCT
ajst-8276	14	1	the	the	DET
ajst-8276	14	2	three	three	NUM
ajst-8276	14	3	main	main	ADJ
ajst-8276	14	4	causes	cause	NOUN
ajst-8276	14	5	of	of	ADP
ajst-8276	14	6	acoustic	acoustic	ADJ
ajst-8276	14	7	signal	signal	NOUN
ajst-8276	14	8	attenuation	attenuation	NOUN
ajst-8276	14	9	in	in	ADP
ajst-8276	14	10	practice	practice	NOUN
ajst-8276	14	11	are	be	AUX
ajst-8276	14	12	diffuse	diffuse	ADJ
ajst-8276	14	13	attenuation	attenuation	NOUN
ajst-8276	14	14	,	,	PUNCT
ajst-8276	14	15	absorption	absorption	NOUN
ajst-8276	14	16	attenuation	attenuation	NOUN
ajst-8276	14	17	and	and	CCONJ
ajst-8276	14	18	scattering	scatter	VERB
ajst-8276	14	19	attenuation	attenuation	NOUN
ajst-8276	14	20	:	:	PUNCT
ajst-8276	15	1	d	d	ADP
ajst-8276	15	2	a	a	DET
ajst-8276	15	3	s	s	NOUN
ajst-8276	15	4			X
ajst-8276	15	5			X
ajst-8276	15	6			PROPN
ajst-8276	15	7			ADV
ajst-8276	15	8			X
ajst-8276	15	9	(	(	PUNCT
ajst-8276	15	10	2	2	NUM
ajst-8276	15	11	)	)	PUNCT
ajst-8276	15	12	where	where	SCONJ
ajst-8276	15	13	:	:	PUNCT
ajst-8276	15	14	αd	αd	PROPN
ajst-8276	15	15	is	be	AUX
ajst-8276	15	16	the	the	DET
ajst-8276	15	17	diffusion	diffusion	NOUN
ajst-8276	15	18	attenuation	attenuation	NOUN
ajst-8276	15	19	coefficient;αa	coefficient;αa	PROPN
ajst-8276	15	20	is	be	AUX
ajst-8276	15	21	the	the	DET
ajst-8276	15	22	absorption	absorption	NOUN
ajst-8276	15	23	attenuation	attenuation	NOUN
ajst-8276	15	24	coefficient;αs	coefficient;αs	NOUN
ajst-8276	15	25	is	be	AUX
ajst-8276	15	26	the	the	DET
ajst-8276	15	27	scattering	scatter	VERB
ajst-8276	15	28	attenuation	attenuation	NOUN
ajst-8276	15	29	coefficient	coefficient	NOUN
ajst-8276	15	30	.	.	PUNCT
ajst-8276	16	1	diffusion	diffusion	NOUN
ajst-8276	16	2	attenuation	attenuation	NOUN
ajst-8276	16	3	means	mean	VERB
ajst-8276	16	4	that	that	SCONJ
ajst-8276	16	5	the	the	DET
ajst-8276	16	6	acoustic	acoustic	ADJ
ajst-8276	16	7	emission	emission	NOUN
ajst-8276	16	8	wave	wave	NOUN
ajst-8276	16	9	propagates	propagate	VERB
ajst-8276	16	10	in	in	ADP
ajst-8276	16	11	all	all	DET
ajst-8276	16	12	directions	direction	NOUN
ajst-8276	16	13	and	and	CCONJ
ajst-8276	16	14	the	the	DET
ajst-8276	16	15	energy	energy	NOUN
ajst-8276	16	16	therefore	therefore	ADV
ajst-8276	16	17	spreads	spread	VERB
ajst-8276	16	18	in	in	ADP
ajst-8276	16	19	all	all	DET
ajst-8276	16	20	directions	direction	NOUN
ajst-8276	16	21	,	,	PUNCT
ajst-8276	16	22	but	but	CCONJ
ajst-8276	16	23	for	for	ADP
ajst-8276	16	24	gas	gas	NOUN
ajst-8276	16	25	pipeline	pipeline	NOUN
ajst-8276	16	26	acoustic	acoustic	ADJ
ajst-8276	16	27	emission	emission	NOUN
ajst-8276	16	28	wave	wave	NOUN
ajst-8276	16	29	propagation	propagation	NOUN
ajst-8276	16	30	in	in	ADP
ajst-8276	16	31	uniform	uniform	ADJ
ajst-8276	16	32	pipe	pipe	NOUN
ajst-8276	16	33	wall	wall	NOUN
ajst-8276	16	34	can	can	AUX
ajst-8276	16	35	be	be	AUX
ajst-8276	16	36	seen	see	VERB
ajst-8276	16	37	as	as	ADP
ajst-8276	16	38	a	a	DET
ajst-8276	16	39	plane	plane	NOUN
ajst-8276	16	40	wave	wave	NOUN
ajst-8276	16	41	,	,	PUNCT
ajst-8276	16	42	thus	thus	ADV
ajst-8276	16	43	there	there	PRON
ajst-8276	16	44	is	be	VERB
ajst-8276	16	45	no	no	DET
ajst-8276	16	46	diffusion	diffusion	NOUN
ajst-8276	16	47	attenuation[7	attenuation[7	PROPN
ajst-8276	16	48	]	]	X
ajst-8276	16	49	,	,	PUNCT
ajst-8276	16	50	23	23	NUM
ajst-8276	16	51	equation	equation	NOUN
ajst-8276	16	52	(	(	PUNCT
ajst-8276	16	53	2	2	X
ajst-8276	16	54	)	)	PUNCT
ajst-8276	16	55	can	can	AUX
ajst-8276	16	56	be	be	AUX
ajst-8276	16	57	simplified	simplify	VERB
ajst-8276	16	58	as	as	ADP
ajst-8276	16	59	:	:	PUNCT
ajst-8276	16	60	a	a	DET
ajst-8276	16	61	s	s	NOUN
ajst-8276	16	62			X
ajst-8276	16	63			NOUN
ajst-8276	16	64			X
ajst-8276	16	65	(	(	PUNCT
ajst-8276	16	66	3	3	X
ajst-8276	16	67	)	)	PUNCT
ajst-8276	16	68	absorption	absorption	NOUN
ajst-8276	16	69	attenuation	attenuation	NOUN
ajst-8276	16	70	coefficient	coefficient	NOUN
ajst-8276	16	71	αa	αa	ADP
ajst-8276	16	72	:	:	PUNCT
ajst-8276	16	73	2	2	NUM
ajst-8276	16	74	3	3	NUM
ajst-8276	16	75	2	2	NUM
ajst-8276	16	76	a	a	DET
ajst-8276	16	77	l	l	NOUN
ajst-8276	16	78	v	v	NOUN
ajst-8276	16	79	f	f	X
ajst-8276	16	80	e	e	X
ajst-8276	16	81	e	e	X
ajst-8276	16	82	v	v	ADP
ajst-8276	16	83	c	c	NOUN
ajst-8276	16	84	e	e	X
ajst-8276	16	85			X
ajst-8276	16	86			X
ajst-8276	16	87			SYM
ajst-8276	16	88			PROPN
ajst-8276	16	89			NOUN
ajst-8276	16	90			ADP
ajst-8276	16	91			PROPN
ajst-8276	16	92			NUM
ajst-8276	16	93	(	(	PUNCT
ajst-8276	16	94	4	4	NUM
ajst-8276	16	95	)	)	PUNCT
ajst-8276	16	96	where	where	SCONJ
ajst-8276	16	97	:	:	PUNCT
ajst-8276	16	98	ρ	ρ	PROPN
ajst-8276	16	99	is	be	AUX
ajst-8276	16	100	the	the	DET
ajst-8276	16	101	density	density	NOUN
ajst-8276	16	102	of	of	ADP
ajst-8276	16	103	the	the	DET
ajst-8276	16	104	pipe	pipe	NOUN
ajst-8276	16	105	material	material	NOUN
ajst-8276	16	106	,	,	PUNCT
ajst-8276	16	107	kg	kg	PROPN
ajst-8276	16	108	/	/	SYM
ajst-8276	16	109	m3;f	m3;f	PROPN
ajst-8276	16	110	is	be	AUX
ajst-8276	16	111	the	the	DET
ajst-8276	16	112	frequency	frequency	NOUN
ajst-8276	16	113	of	of	ADP
ajst-8276	16	114	the	the	DET
ajst-8276	16	115	acoustic	acoustic	ADJ
ajst-8276	16	116	emission	emission	NOUN
ajst-8276	16	117	signal	signal	NOUN
ajst-8276	16	118	,	,	PUNCT
ajst-8276	16	119	hz;vl	hz;vl	PROPN
ajst-8276	16	120	is	be	AUX
ajst-8276	16	121	the	the	DET
ajst-8276	16	122	longitudinal	longitudinal	ADJ
ajst-8276	16	123	wave	wave	NOUN
ajst-8276	16	124	velocity	velocity	NOUN
ajst-8276	16	125	of	of	ADP
ajst-8276	16	126	the	the	DET
ajst-8276	16	127	acoustic	acoustic	ADJ
ajst-8276	16	128	emission	emission	NOUN
ajst-8276	16	129	,	,	PUNCT
ajst-8276	16	130	m	m	PROPN
ajst-8276	16	131	/	/	SYM
ajst-8276	16	132	s;cv	s;cv	PROPN
ajst-8276	16	133	is	be	AUX
ajst-8276	16	134	the	the	DET
ajst-8276	16	135	constant	constant	ADJ
ajst-8276	16	136	specific	specific	ADJ
ajst-8276	16	137	heat	heat	NOUN
ajst-8276	16	138	capacity	capacity	NOUN
ajst-8276	16	139	of	of	ADP
ajst-8276	16	140	the	the	DET
ajst-8276	16	141	pipe	pipe	NOUN
ajst-8276	16	142	,	,	PUNCT
ajst-8276	16	143	j/(kg·k);χ	j/(kg·k);χ	PROPN
ajst-8276	16	144	is	be	AUX
ajst-8276	16	145	the	the	DET
ajst-8276	16	146	heat	heat	NOUN
ajst-8276	16	147	transfer	transfer	NOUN
ajst-8276	16	148	coefficient	coefficient	NOUN
ajst-8276	16	149	of	of	ADP
ajst-8276	16	150	the	the	DET
ajst-8276	16	151	pipe	pipe	NOUN
ajst-8276	16	152	,	,	PUNCT
ajst-8276	16	153	w/(m·k);e	w/(m·k);e	X
ajst-8276	16	154	is	be	AUX
ajst-8276	16	155	the	the	DET
ajst-8276	16	156	corresponding	corresponding	ADJ
ajst-8276	16	157	elasticity	elasticity	NOUN
ajst-8276	16	158	factor	factor	NOUN
ajst-8276	16	159	,	,	PUNCT
ajst-8276	16	160	mpa	mpa	PROPN
ajst-8276	16	161	。	。	NOUN
ajst-8276	16	162	scattering	scatter	VERB
ajst-8276	16	163	attenuation	attenuation	NOUN
ajst-8276	16	164	coefficient	coefficient	NOUN
ajst-8276	17	1	αs	αs	ADP
ajst-8276	17	2	:	:	PUNCT
ajst-8276	17	3	4	4	NUM
ajst-8276	17	4	2	2	NUM
ajst-8276	17	5	4	4	NUM
ajst-8276	17	6	4	4	NUM
ajst-8276	17	7	8	8	NUM
ajst-8276	17	8	9	9	NUM
ajst-8276	17	9	c	c	NOUN
ajst-8276	17	10	s	s	PROPN
ajst-8276	17	11	l	l	NOUN
ajst-8276	17	12	l	l	NOUN
ajst-8276	18	1	f	f	PROPN
ajst-8276	18	2	s	s	X
ajst-8276	18	3	v	v	PROPN
ajst-8276	18	4			PROPN
ajst-8276	18	5			PROPN
ajst-8276	18	6	(	(	PUNCT
ajst-8276	18	7	5	5	NUM
ajst-8276	18	8	)	)	PUNCT
ajst-8276	18	9	where	where	SCONJ
ajst-8276	18	10	:	:	PUNCT
ajst-8276	18	11	lc	lc	PROPN
ajst-8276	18	12	is	be	AUX
ajst-8276	18	13	the	the	DET
ajst-8276	18	14	average	average	ADJ
ajst-8276	18	15	grain	grain	NOUN
ajst-8276	18	16	diameter	diameter	NOUN
ajst-8276	18	17	of	of	ADP
ajst-8276	18	18	the	the	DET
ajst-8276	18	19	pipe	pipe	NOUN
ajst-8276	18	20	material	material	NOUN
ajst-8276	18	21	,	,	PUNCT
ajst-8276	18	22	m;s	m;s	PROPN
ajst-8276	18	23	is	be	AUX
ajst-8276	18	24	the	the	DET
ajst-8276	18	25	scattering	scatter	VERB
ajst-8276	18	26	factor	factor	NOUN
ajst-8276	18	27	,	,	PUNCT
ajst-8276	18	28	is	be	AUX
ajst-8276	18	29	a	a	DET
ajst-8276	18	30	function	function	NOUN
ajst-8276	18	31	of	of	ADP
ajst-8276	18	32	the	the	DET
ajst-8276	18	33	incident	incident	NOUN
ajst-8276	18	34	and	and	CCONJ
ajst-8276	18	35	scattered	scatter	VERB
ajst-8276	18	36	waves	wave	NOUN
ajst-8276	18	37	[	[	X
ajst-8276	18	38	8	8	NUM
ajst-8276	18	39	]	]	PUNCT
ajst-8276	18	40	.	.	PUNCT
ajst-8276	19	1	simplifying	simplify	VERB
ajst-8276	19	2	other	other	ADJ
ajst-8276	19	3	types	type	NOUN
ajst-8276	19	4	of	of	ADP
ajst-8276	19	5	attenuation	attenuation	NOUN
ajst-8276	19	6	such	such	ADJ
ajst-8276	19	7	as	as	ADP
ajst-8276	19	8	dispersion	dispersion	NOUN
ajst-8276	19	9	,	,	PUNCT
ajst-8276	19	10	"	"	PUNCT
ajst-8276	19	11	leakage	leakage	NOUN
ajst-8276	19	12	"	"	PUNCT
ajst-8276	19	13	between	between	ADP
ajst-8276	19	14	adjacent	adjacent	ADJ
ajst-8276	19	15	media	medium	NOUN
ajst-8276	19	16	and	and	CCONJ
ajst-8276	19	17	obstructions	obstruction	NOUN
ajst-8276	19	18	to	to	ADP
ajst-8276	19	19	α	α	PRON
ajst-8276	19	20	'	'	PUNCT
ajst-8276	19	21	makes	make	VERB
ajst-8276	19	22	the	the	DET
ajst-8276	19	23	attenuation	attenuation	NOUN
ajst-8276	19	24	model	model	NOUN
ajst-8276	19	25	more	more	ADV
ajst-8276	19	26	relevant	relevant	ADJ
ajst-8276	19	27	to	to	ADP
ajst-8276	19	28	real	real	ADJ
ajst-8276	19	29	world	world	NOUN
ajst-8276	19	30	situations	situation	NOUN
ajst-8276	19	31	and	and	CCONJ
ajst-8276	19	32	has	have	VERB
ajst-8276	19	33	engineering	engineering	NOUN
ajst-8276	19	34	applications	application	NOUN
ajst-8276	19	35	:	:	PUNCT
ajst-8276	19	36	a	a	DET
ajst-8276	19	37	s	s	NOUN
ajst-8276	19	38			X
ajst-8276	19	39			NOUN
ajst-8276	19	40			PROPN
ajst-8276	19	41			VERB
ajst-8276	19	42			X
ajst-8276	19	43	(	(	PUNCT
ajst-8276	19	44	6	6	NUM
ajst-8276	19	45	)	)	PUNCT
ajst-8276	19	46	in	in	ADP
ajst-8276	19	47	the	the	DET
ajst-8276	19	48	actual	actual	ADJ
ajst-8276	19	49	propagation	propagation	NOUN
ajst-8276	19	50	process	process	NOUN
ajst-8276	19	51	,	,	PUNCT
ajst-8276	19	52	the	the	DET
ajst-8276	19	53	attenuation	attenuation	NOUN
ajst-8276	19	54	mechanism	mechanism	NOUN
ajst-8276	19	55	of	of	ADP
ajst-8276	19	56	acoustic	acoustic	ADJ
ajst-8276	19	57	emission	emission	NOUN
ajst-8276	19	58	waves	wave	NOUN
ajst-8276	19	59	is	be	AUX
ajst-8276	19	60	very	very	ADV
ajst-8276	19	61	complex	complex	ADJ
ajst-8276	19	62	and	and	CCONJ
ajst-8276	19	63	difficult	difficult	ADJ
ajst-8276	19	64	to	to	PART
ajst-8276	19	65	establish	establish	VERB
ajst-8276	19	66	a	a	DET
ajst-8276	19	67	perfect	perfect	ADJ
ajst-8276	19	68	theoretical	theoretical	ADJ
ajst-8276	19	69	model	model	NOUN
ajst-8276	19	70	,	,	PUNCT
ajst-8276	19	71	the	the	DET
ajst-8276	19	72	attenuation	attenuation	NOUN
ajst-8276	19	73	coefficient	coefficient	NOUN
ajst-8276	19	74	is	be	AUX
ajst-8276	19	75	very	very	ADV
ajst-8276	19	76	difficult	difficult	ADJ
ajst-8276	19	77	to	to	PART
ajst-8276	19	78	find	find	VERB
ajst-8276	19	79	,	,	PUNCT
ajst-8276	19	80	must	must	AUX
ajst-8276	19	81	be	be	AUX
ajst-8276	19	82	based	base	VERB
ajst-8276	19	83	on	on	ADP
ajst-8276	19	84	theoretical	theoretical	ADJ
ajst-8276	19	85	research	research	NOUN
ajst-8276	19	86	to	to	PART
ajst-8276	19	87	find	find	VERB
ajst-8276	19	88	the	the	DET
ajst-8276	19	89	experimental	experimental	NOUN
ajst-8276	19	90	.	.	PUNCT
ajst-8276	20	1	the	the	DET
ajst-8276	20	2	size	size	NOUN
ajst-8276	20	3	of	of	ADP
ajst-8276	20	4	the	the	DET
ajst-8276	20	5	attenuation	attenuation	NOUN
ajst-8276	20	6	coefficient	coefficient	NOUN
ajst-8276	20	7	of	of	ADP
ajst-8276	20	8	acoustic	acoustic	ADJ
ajst-8276	20	9	emission	emission	NOUN
ajst-8276	20	10	is	be	AUX
ajst-8276	20	11	related	relate	VERB
ajst-8276	20	12	to	to	ADP
ajst-8276	20	13	the	the	DET
ajst-8276	20	14	range	range	NOUN
ajst-8276	20	15	of	of	ADP
ajst-8276	20	16	acoustic	acoustic	ADJ
ajst-8276	20	17	emission	emission	NOUN
ajst-8276	20	18	sensors	sensor	NOUN
ajst-8276	20	19	and	and	CCONJ
ajst-8276	20	20	is	be	AUX
ajst-8276	20	21	a	a	DET
ajst-8276	20	22	key	key	ADJ
ajst-8276	20	23	factor	factor	NOUN
ajst-8276	20	24	in	in	ADP
ajst-8276	20	25	the	the	DET
ajst-8276	20	26	effectiveness	effectiveness	NOUN
ajst-8276	20	27	and	and	CCONJ
ajst-8276	20	28	efficiency	efficiency	NOUN
ajst-8276	20	29	of	of	ADP
ajst-8276	20	30	monitoring	monitoring	NOUN
ajst-8276	20	31	in	in	ADP
ajst-8276	20	32	the	the	DET
ajst-8276	20	33	process	process	NOUN
ajst-8276	20	34	.	.	PUNCT
ajst-8276	21	1	3	3	X
ajst-8276	21	2	.	.	X
ajst-8276	21	3	experimental	experimental	ADJ
ajst-8276	21	4	analysis	analysis	NOUN
ajst-8276	21	5	of	of	ADP
ajst-8276	21	6	acoustic	acoustic	ADJ
ajst-8276	21	7	emission	emission	NOUN
ajst-8276	21	8	attenuation	attenuation	NOUN
ajst-8276	21	9	of	of	ADP
ajst-8276	21	10	plastic	plastic	ADJ
ajst-8276	21	11	pipes	pipe	NOUN
ajst-8276	21	12	based	base	VERB
ajst-8276	21	13	on	on	ADP
ajst-8276	21	14	theoretical	theoretical	ADJ
ajst-8276	21	15	analysis	analysis	NOUN
ajst-8276	21	16	of	of	ADP
ajst-8276	21	17	the	the	DET
ajst-8276	21	18	attenuation	attenuation	NOUN
ajst-8276	21	19	of	of	ADP
ajst-8276	21	20	acoustic	acoustic	ADJ
ajst-8276	21	21	emission	emission	NOUN
ajst-8276	21	22	signals	signal	NOUN
ajst-8276	21	23	from	from	ADP
ajst-8276	21	24	leaks	leak	NOUN
ajst-8276	21	25	in	in	ADP
ajst-8276	21	26	plastic	plastic	ADJ
ajst-8276	21	27	gas	gas	NOUN
ajst-8276	21	28	pipelines	pipeline	NOUN
ajst-8276	21	29	,	,	PUNCT
ajst-8276	21	30	a	a	DET
ajst-8276	21	31	complete	complete	ADJ
ajst-8276	21	32	plastic	plastic	NOUN
ajst-8276	21	33	pipeline	pipeline	NOUN
ajst-8276	21	34	system	system	NOUN
ajst-8276	21	35	is	be	AUX
ajst-8276	21	36	built	build	VERB
ajst-8276	21	37	in	in	ADP
ajst-8276	21	38	a	a	DET
ajst-8276	21	39	laboratory	laboratory	NOUN
ajst-8276	21	40	environment	environment	NOUN
ajst-8276	21	41	,	,	PUNCT
ajst-8276	21	42	using	use	VERB
ajst-8276	21	43	an	an	DET
ajst-8276	21	44	air	air	NOUN
ajst-8276	21	45	compressor	compressor	NOUN
ajst-8276	21	46	to	to	PART
ajst-8276	21	47	fill	fill	VERB
ajst-8276	21	48	the	the	DET
ajst-8276	21	49	pipeline	pipeline	NOUN
ajst-8276	21	50	with	with	ADP
ajst-8276	21	51	high	high	ADJ
ajst-8276	21	52	-	-	PUNCT
ajst-8276	21	53	pressure	pressure	NOUN
ajst-8276	21	54	air	air	NOUN
ajst-8276	21	55	to	to	PART
ajst-8276	21	56	simulate	simulate	VERB
ajst-8276	21	57	gas	gas	NOUN
ajst-8276	21	58	transport	transport	NOUN
ajst-8276	21	59	,	,	PUNCT
ajst-8276	21	60	and	and	CCONJ
ajst-8276	21	61	by	by	ADP
ajst-8276	21	62	opening	open	VERB
ajst-8276	21	63	artificial	artificial	ADJ
ajst-8276	21	64	leak	leak	NOUN
ajst-8276	21	65	holes	hole	NOUN
ajst-8276	21	66	in	in	ADP
ajst-8276	21	67	the	the	DET
ajst-8276	21	68	pipeline	pipeline	NOUN
ajst-8276	21	69	,	,	PUNCT
ajst-8276	21	70	a	a	DET
ajst-8276	21	71	leakage	leakage	NOUN
ajst-8276	21	72	failure	failure	NOUN
ajst-8276	21	73	simulation	simulation	NOUN
ajst-8276	21	74	experiment	experiment	NOUN
ajst-8276	21	75	is	be	AUX
ajst-8276	21	76	carried	carry	VERB
ajst-8276	21	77	out	out	ADP
ajst-8276	21	78	to	to	PART
ajst-8276	21	79	study	study	VERB
ajst-8276	21	80	the	the	DET
ajst-8276	21	81	attenuation	attenuation	NOUN
ajst-8276	21	82	of	of	ADP
ajst-8276	21	83	acoustic	acoustic	ADJ
ajst-8276	21	84	emission	emission	NOUN
ajst-8276	21	85	signals	signal	NOUN
ajst-8276	21	86	from	from	ADP
ajst-8276	21	87	plastic	plastic	ADJ
ajst-8276	21	88	gas	gas	NOUN
ajst-8276	21	89	pipelines	pipeline	NOUN
ajst-8276	21	90	at	at	ADP
ajst-8276	21	91	different	different	ADJ
ajst-8276	21	92	distances	distance	NOUN
ajst-8276	21	93	and	and	CCONJ
ajst-8276	21	94	pressures	pressure	NOUN
ajst-8276	21	95	.	.	PUNCT
ajst-8276	22	1	with	with	ADP
ajst-8276	22	2	the	the	DET
ajst-8276	22	3	internal	internal	ADJ
ajst-8276	22	4	pressure	pressure	NOUN
ajst-8276	22	5	of	of	ADP
ajst-8276	22	6	the	the	DET
ajst-8276	22	7	pipe	pipe	NOUN
ajst-8276	22	8	kept	keep	VERB
ajst-8276	22	9	constant	constant	ADJ
ajst-8276	22	10	and	and	CCONJ
ajst-8276	22	11	the	the	DET
ajst-8276	22	12	leak	leak	NOUN
ajst-8276	22	13	hole	hole	NOUN
ajst-8276	22	14	diameter	diameter	NOUN
ajst-8276	22	15	of	of	ADP
ajst-8276	22	16	4	4	NUM
ajst-8276	22	17	mm	mm	NOUN
ajst-8276	22	18	,	,	PUNCT
ajst-8276	22	19	the	the	DET
ajst-8276	22	20	distance	distance	NOUN
ajst-8276	22	21	of	of	ADP
ajst-8276	22	22	the	the	DET
ajst-8276	22	23	sensor	sensor	NOUN
ajst-8276	22	24	from	from	ADP
ajst-8276	22	25	the	the	DET
ajst-8276	22	26	leak	leak	NOUN
ajst-8276	22	27	hole	hole	NOUN
ajst-8276	22	28	is	be	AUX
ajst-8276	22	29	varied	varied	ADJ
ajst-8276	22	30	and	and	CCONJ
ajst-8276	22	31	the	the	DET
ajst-8276	22	32	signal	signal	NOUN
ajst-8276	22	33	is	be	AUX
ajst-8276	22	34	collected	collect	VERB
ajst-8276	22	35	at	at	ADP
ajst-8276	22	36	0.0	0.0	NUM
ajst-8276	22	37	m	m	NOUN
ajst-8276	22	38	,	,	PUNCT
ajst-8276	22	39	0.1	0.1	NUM
ajst-8276	22	40	m	m	NOUN
ajst-8276	22	41	,	,	PUNCT
ajst-8276	22	42	0.2	0.2	NUM
ajst-8276	22	43	m	m	PROPN
ajst-8276	22	44	,	,	PUNCT
ajst-8276	22	45	0.3	0.3	NUM
ajst-8276	22	46	m	m	NOUN
ajst-8276	22	47	,	,	PUNCT
ajst-8276	22	48	0.4	0.4	NUM
ajst-8276	22	49	m	m	PROPN
ajst-8276	22	50	,	,	PUNCT
ajst-8276	22	51	0.5	0.5	NUM
ajst-8276	22	52	m	m	NOUN
ajst-8276	22	53	,	,	PUNCT
ajst-8276	22	54	0.6	0.6	NUM
ajst-8276	22	55	m	m	PROPN
ajst-8276	22	56	,	,	PUNCT
ajst-8276	22	57	0.7	0.7	NUM
ajst-8276	22	58	m	m	NOUN
ajst-8276	22	59	,	,	PUNCT
ajst-8276	22	60	0.8	0.8	NUM
ajst-8276	22	61	m	m	NOUN
ajst-8276	22	62	,	,	PUNCT
ajst-8276	22	63	0.9	0.9	NUM
ajst-8276	22	64	m	m	NOUN
ajst-8276	22	65	,	,	PUNCT
ajst-8276	22	66	1	1	NUM
ajst-8276	22	67	m	m	NOUN
ajst-8276	22	68	,	,	PUNCT
ajst-8276	22	69	2	2	NUM
ajst-8276	22	70	m	m	NOUN
ajst-8276	22	71	,	,	PUNCT
ajst-8276	22	72	3	3	NUM
ajst-8276	22	73	m	m	NOUN
ajst-8276	22	74	,	,	PUNCT
ajst-8276	22	75	4	4	NUM
ajst-8276	22	76	m	m	NOUN
ajst-8276	22	77	,	,	PUNCT
ajst-8276	22	78	5	5	NUM
ajst-8276	22	79	m	m	NOUN
ajst-8276	22	80	,	,	PUNCT
ajst-8276	22	81	6	6	NUM
ajst-8276	22	82	m	m	NOUN
ajst-8276	22	83	,	,	PUNCT
ajst-8276	22	84	8	8	NUM
ajst-8276	22	85	m	m	NOUN
ajst-8276	22	86	,	,	PUNCT
ajst-8276	22	87	10	10	NUM
ajst-8276	22	88	m	m	PROPN
ajst-8276	22	89	,	,	PUNCT
ajst-8276	22	90	12	12	NUM
ajst-8276	22	91	m	m	NOUN
ajst-8276	22	92	,	,	PUNCT
ajst-8276	22	93	18	18	NUM
ajst-8276	22	94	m	m	NOUN
ajst-8276	22	95	and	and	CCONJ
ajst-8276	22	96	26	26	NUM
ajst-8276	22	97	m	m	NOUN
ajst-8276	22	98	in	in	ADP
ajst-8276	22	99	turn	turn	NOUN
ajst-8276	22	100	.	.	PUNCT
ajst-8276	23	1	pipeline	pipeline	NOUN
ajst-8276	23	2	leakage	leakage	NOUN
ajst-8276	23	3	signal	signal	NOUN
ajst-8276	23	4	amplitude	amplitude	NOUN
ajst-8276	23	5	and	and	CCONJ
ajst-8276	23	6	analyse	analyse	VERB
ajst-8276	23	7	its	its	PRON
ajst-8276	23	8	attenuation	attenuation	NOUN
ajst-8276	23	9	change	change	NOUN
ajst-8276	23	10	pattern	pattern	NOUN
ajst-8276	23	11	.	.	PUNCT
ajst-8276	24	1	0.0	0.0	NUM
ajst-8276	24	2	0.2	0.2	NUM
ajst-8276	24	3	0.4	0.4	NUM
ajst-8276	24	4	0.6	0.6	NUM
ajst-8276	24	5	0.8	0.8	NUM
ajst-8276	24	6	1.0	1.0	NUM
ajst-8276	24	7	0	0	NUM
ajst-8276	24	8	500	500	NUM
ajst-8276	24	9	1000	1000	NUM
ajst-8276	24	10	1500	1500	NUM
ajst-8276	24	11	2000	2000	NUM
ajst-8276	24	12	2500	2500	NUM
ajst-8276	24	13	3000	3000	NUM
ajst-8276	24	14	3500	3500	NUM
ajst-8276	24	15	m	m	NOUN
ajst-8276	24	16	ag	ag	PROPN
ajst-8276	24	17	ni	ni	PROPN
ajst-8276	24	18	tu	tu	PROPN
ajst-8276	24	19	de	de	X
ajst-8276	24	20	（	（	PROPN
ajst-8276	24	21	m	m	VERB
ajst-8276	24	22	v	v	NOUN
ajst-8276	24	23	）	）	PUNCT
ajst-8276	24	24	distance（m	distance（m	PUNCT
ajst-8276	24	25	）	）	PUNCT
ajst-8276	24	26	0.15mpa	0.15mpa	NUM
ajst-8276	24	27	0.20mpa	0.20mpa	NOUN
ajst-8276	24	28	0.25mpa	0.25mpa	NOUN
ajst-8276	24	29	0.30mpa	0.30mpa	NOUN
ajst-8276	24	30	0.35mpa	0.35mpa	NOUN
ajst-8276	24	31	0	0	NUM
ajst-8276	24	32	2	2	NUM
ajst-8276	24	33	4	4	NUM
ajst-8276	24	34	6	6	NUM
ajst-8276	24	35	8	8	NUM
ajst-8276	24	36	10	10	NUM
ajst-8276	24	37	12	12	NUM
ajst-8276	24	38	14	14	NUM
ajst-8276	24	39	16	16	NUM
ajst-8276	24	40	18	18	NUM
ajst-8276	24	41	20	20	NUM
ajst-8276	24	42	22	22	NUM
ajst-8276	24	43	24	24	NUM
ajst-8276	24	44	26	26	NUM
ajst-8276	24	45	0	0	NUM
ajst-8276	24	46	10	10	NUM
ajst-8276	24	47	20	20	NUM
ajst-8276	24	48	30	30	NUM
ajst-8276	24	49	40	40	NUM
ajst-8276	24	50	50	50	NUM
ajst-8276	24	51	60	60	NUM
ajst-8276	24	52	m	m	NOUN
ajst-8276	24	53	ag	ag	PROPN
ajst-8276	24	54	ni	ni	PROPN
ajst-8276	24	55	tu	tu	PROPN
ajst-8276	24	56	de	de	X
ajst-8276	24	57	（	（	PROPN
ajst-8276	24	58	m	m	VERB
ajst-8276	24	59	v	v	NOUN
ajst-8276	24	60	）	）	PUNCT
ajst-8276	24	61	distance（m	distance（m	PUNCT
ajst-8276	24	62	）	）	PUNCT
ajst-8276	25	1	0.15mpa	0.15mpa	NUM
ajst-8276	25	2	0.20mpa	0.20mpa	NOUN
ajst-8276	25	3	0.25mpa	0.25mpa	NOUN
ajst-8276	25	4	0.30mpa	0.30mpa	NOUN
ajst-8276	25	5	0.35mpa	0.35mpa	NUM
ajst-8276	26	1	figure	figure	NOUN
ajst-8276	26	2	1	1	NUM
ajst-8276	26	3	.	.	PUNCT
ajst-8276	27	1	leakage	leakage	NOUN
ajst-8276	27	2	signal	signal	NOUN
ajst-8276	27	3	amplitude	amplitude	NOUN
ajst-8276	27	4	versus	versus	ADP
ajst-8276	27	5	distance	distance	NOUN
ajst-8276	27	6	as	as	ADP
ajst-8276	27	7	the	the	DET
ajst-8276	27	8	monitoring	monitoring	NOUN
ajst-8276	27	9	distance	distance	NOUN
ajst-8276	27	10	increases	increase	NOUN
ajst-8276	27	11	,	,	PUNCT
ajst-8276	27	12	the	the	DET
ajst-8276	27	13	amplitude	amplitude	NOUN
ajst-8276	27	14	of	of	ADP
ajst-8276	27	15	the	the	DET
ajst-8276	27	16	acoustic	acoustic	ADJ
ajst-8276	27	17	emission	emission	NOUN
ajst-8276	27	18	signal	signal	NOUN
ajst-8276	27	19	of	of	ADP
ajst-8276	27	20	the	the	DET
ajst-8276	27	21	pipeline	pipeline	NOUN
ajst-8276	27	22	leakage	leakage	NOUN
ajst-8276	27	23	decreases	decrease	VERB
ajst-8276	27	24	rapidly	rapidly	ADV
ajst-8276	27	25	in	in	ADP
ajst-8276	27	26	the	the	DET
ajst-8276	27	27	near	near	ADJ
ajst-8276	27	28	distance	distance	NOUN
ajst-8276	27	29	,	,	PUNCT
ajst-8276	27	30	and	and	CCONJ
ajst-8276	27	31	it	it	PRON
ajst-8276	27	32	has	have	AUX
ajst-8276	27	33	decayed	decay	VERB
ajst-8276	27	34	to	to	ADP
ajst-8276	27	35	a	a	DET
ajst-8276	27	36	small	small	ADJ
ajst-8276	27	37	value	value	NOUN
ajst-8276	27	38	at	at	ADP
ajst-8276	27	39	0.2m~0.3	0.2m~0.3	NUM
ajst-8276	27	40	m	m	VERB
ajst-8276	27	41	with	with	ADP
ajst-8276	27	42	little	little	ADJ
ajst-8276	27	43	change	change	NOUN
ajst-8276	27	44	afterwards	afterwards	ADV
ajst-8276	27	45	.	.	PUNCT
ajst-8276	28	1	as	as	SCONJ
ajst-8276	28	2	the	the	DET
ajst-8276	28	3	propagation	propagation	NOUN
ajst-8276	28	4	distance	distance	NOUN
ajst-8276	28	5	gradually	gradually	ADV
ajst-8276	28	6	increases	increase	VERB
ajst-8276	28	7	,	,	PUNCT
ajst-8276	28	8	the	the	DET
ajst-8276	28	9	acoustic	acoustic	ADJ
ajst-8276	28	10	emission	emission	NOUN
ajst-8276	28	11	signal	signal	NOUN
ajst-8276	28	12	attenuates	attenuate	VERB
ajst-8276	28	13	very	very	ADV
ajst-8276	28	14	seriously	seriously	ADV
ajst-8276	28	15	,	,	PUNCT
ajst-8276	28	16	with	with	ADP
ajst-8276	28	17	a	a	DET
ajst-8276	28	18	large	large	ADJ
ajst-8276	28	19	attenuation	attenuation	NOUN
ajst-8276	28	20	coefficient	coefficient	NOUN
ajst-8276	28	21	,	,	PUNCT
ajst-8276	28	22	and	and	CCONJ
ajst-8276	28	23	the	the	DET
ajst-8276	28	24	amplitude	amplitude	NOUN
ajst-8276	28	25	image	image	NOUN
ajst-8276	28	26	conforms	conform	VERB
ajst-8276	28	27	to	to	ADP
ajst-8276	28	28	the	the	DET
ajst-8276	28	29	form	form	NOUN
ajst-8276	28	30	of	of	ADP
ajst-8276	28	31	an	an	DET
ajst-8276	28	32	exponential	exponential	ADJ
ajst-8276	28	33	function	function	NOUN
ajst-8276	28	34	;	;	PUNCT
ajst-8276	28	35	the	the	DET
ajst-8276	28	36	anomalous	anomalous	ADJ
ajst-8276	28	37	increase	increase	NOUN
ajst-8276	28	38	at	at	ADP
ajst-8276	28	39	8	8	NUM
ajst-8276	28	40	m	m	NOUN
ajst-8276	28	41	and	and	CCONJ
ajst-8276	28	42	26	26	NUM
ajst-8276	28	43	m	m	NOUN
ajst-8276	28	44	is	be	AUX
ajst-8276	28	45	due	due	ADJ
ajst-8276	28	46	to	to	ADP
ajst-8276	28	47	the	the	DET
ajst-8276	28	48	mode	mode	NOUN
ajst-8276	28	49	conversion	conversion	NOUN
ajst-8276	28	50	that	that	PRON
ajst-8276	28	51	occurs	occur	VERB
ajst-8276	28	52	during	during	ADP
ajst-8276	28	53	the	the	DET
ajst-8276	28	54	propagation	propagation	NOUN
ajst-8276	28	55	of	of	ADP
ajst-8276	28	56	the	the	DET
ajst-8276	28	57	acoustic	acoustic	ADJ
ajst-8276	28	58	emission	emission	NOUN
ajst-8276	28	59	wave	wave	NOUN
ajst-8276	28	60	,	,	PUNCT
ajst-8276	28	61	as	as	SCONJ
ajst-8276	28	62	the	the	DET
ajst-8276	28	63	sharp	sharp	ADJ
ajst-8276	28	64	pulse	pulse	NOUN
ajst-8276	28	65	waves	wave	NOUN
ajst-8276	28	66	generated	generate	VERB
ajst-8276	28	67	by	by	ADP
ajst-8276	28	68	the	the	DET
ajst-8276	28	69	wave	wave	NOUN
ajst-8276	28	70	source	source	NOUN
ajst-8276	28	71	propagate	propagate	VERB
ajst-8276	28	72	,	,	PUNCT
ajst-8276	28	73	the	the	DET
ajst-8276	28	74	waves	wave	NOUN
ajst-8276	28	75	of	of	ADP
ajst-8276	28	76	different	different	ADJ
ajst-8276	28	77	modes	mode	NOUN
ajst-8276	28	78	propagate	propagate	VERB
ajst-8276	28	79	at	at	ADP
ajst-8276	28	80	different	different	ADJ
ajst-8276	28	81	speeds	speed	NOUN
ajst-8276	28	82	,	,	PUNCT
ajst-8276	28	83	so	so	SCONJ
ajst-8276	28	84	that	that	SCONJ
ajst-8276	28	85	different	different	ADJ
ajst-8276	28	86	types	type	NOUN
ajst-8276	28	87	of	of	ADP
ajst-8276	28	88	waves	wave	NOUN
ajst-8276	28	89	arrive	arrive	VERB
ajst-8276	28	90	in	in	ADP
ajst-8276	28	91	turn	turn	NOUN
ajst-8276	28	92	and	and	CCONJ
ajst-8276	28	93	superimpose	superimpose	VERB
ajst-8276	28	94	or	or	CCONJ
ajst-8276	28	95	cancel	cancel	VERB
ajst-8276	28	96	each	each	DET
ajst-8276	28	97	other	other	ADJ
ajst-8276	28	98	,	,	PUNCT
ajst-8276	28	99	making	make	VERB
ajst-8276	28	100	the	the	DET
ajst-8276	28	101	amplitude	amplitude	NOUN
ajst-8276	28	102	as	as	ADP
ajst-8276	28	103	the	the	DET
ajst-8276	28	104	propagation	propagation	NOUN
ajst-8276	28	105	distance	distance	NOUN
ajst-8276	28	106	increases	increase	NOUN
ajst-8276	28	107	,	,	PUNCT
ajst-8276	28	108	the	the	DET
ajst-8276	28	109	amplitude	amplitude	NOUN
ajst-8276	28	110	does	do	AUX
ajst-8276	28	111	not	not	PART
ajst-8276	28	112	show	show	VERB
ajst-8276	28	113	a	a	DET
ajst-8276	28	114	monotonic	monotonic	ADJ
ajst-8276	28	115	decline	decline	NOUN
ajst-8276	28	116	;	;	PUNCT
ajst-8276	28	117	the	the	PRON
ajst-8276	28	118	greater	great	ADJ
ajst-8276	28	119	the	the	DET
ajst-8276	28	120	leakage	leakage	NOUN
ajst-8276	28	121	pressure	pressure	NOUN
ajst-8276	28	122	,	,	PUNCT
ajst-8276	28	123	the	the	PRON
ajst-8276	28	124	greater	great	ADJ
ajst-8276	28	125	the	the	DET
ajst-8276	28	126	amplitude	amplitude	NOUN
ajst-8276	28	127	of	of	ADP
ajst-8276	28	128	the	the	DET
ajst-8276	28	129	leakage	leakage	NOUN
ajst-8276	28	130	acoustic	acoustic	ADJ
ajst-8276	28	131	emission	emission	NOUN
ajst-8276	28	132	signal	signal	NOUN
ajst-8276	28	133	,	,	PUNCT
ajst-8276	28	134	the	the	DET
ajst-8276	28	135	different	different	ADJ
ajst-8276	28	136	leakage	leakage	NOUN
ajst-8276	28	137	pressure	pressure	NOUN
ajst-8276	28	138	attenuation	attenuation	NOUN
ajst-8276	28	139	characteristics	characteristic	NOUN
ajst-8276	28	140	of	of	ADP
ajst-8276	28	141	the	the	DET
ajst-8276	28	142	law	law	NOUN
ajst-8276	28	143	of	of	ADP
ajst-8276	28	144	change	change	NOUN
ajst-8276	28	145	has	have	VERB
ajst-8276	28	146	the	the	DET
ajst-8276	28	147	same	same	ADJ
ajst-8276	28	148	trend	trend	NOUN
ajst-8276	28	149	,	,	PUNCT
ajst-8276	28	150	that	that	ADV
ajst-8276	28	151	is	is	ADV
ajst-8276	28	152	,	,	PUNCT
ajst-8276	28	153	the	the	DET
ajst-8276	28	154	attenuation	attenuation	NOUN
ajst-8276	28	155	characteristics	characteristic	NOUN
ajst-8276	28	156	and	and	CCONJ
ajst-8276	28	157	the	the	DET
ajst-8276	28	158	size	size	NOUN
ajst-8276	28	159	of	of	ADP
ajst-8276	28	160	the	the	DET
ajst-8276	28	161	leakage	leakage	NOUN
ajst-8276	28	162	pressure	pressure	NOUN
ajst-8276	28	163	is	be	AUX
ajst-8276	28	164	not	not	PART
ajst-8276	28	165	relevant	relevant	ADJ
ajst-8276	28	166	.	.	PUNCT
ajst-8276	29	1	4	4	X
ajst-8276	29	2	.	.	X
ajst-8276	29	3	summary	summary	NOUN
ajst-8276	29	4	(	(	PUNCT
ajst-8276	29	5	1	1	X
ajst-8276	29	6	)	)	PUNCT
ajst-8276	29	7	the	the	DET
ajst-8276	29	8	attenuation	attenuation	NOUN
ajst-8276	29	9	of	of	ADP
ajst-8276	29	10	acoustic	acoustic	ADJ
ajst-8276	29	11	emission	emission	NOUN
ajst-8276	29	12	signals	signal	NOUN
ajst-8276	29	13	from	from	ADP
ajst-8276	29	14	plastic	plastic	ADJ
ajst-8276	29	15	pipe	pipe	NOUN
ajst-8276	29	16	leaks	leak	NOUN
ajst-8276	29	17	at	at	ADP
ajst-8276	29	18	different	different	ADJ
ajst-8276	29	19	pressures	pressure	NOUN
ajst-8276	29	20	is	be	AUX
ajst-8276	29	21	very	very	ADV
ajst-8276	29	22	serious	serious	ADJ
ajst-8276	29	23	,	,	PUNCT
ajst-8276	29	24	and	and	CCONJ
ajst-8276	29	25	the	the	DET
ajst-8276	29	26	24	24	NUM
ajst-8276	29	27	overall	overall	ADJ
ajst-8276	29	28	attenuation	attenuation	NOUN
ajst-8276	29	29	image	image	NOUN
ajst-8276	29	30	is	be	AUX
ajst-8276	29	31	in	in	ADP
ajst-8276	29	32	the	the	DET
ajst-8276	29	33	form	form	NOUN
ajst-8276	29	34	of	of	ADP
ajst-8276	29	35	an	an	DET
ajst-8276	29	36	exponential	exponential	ADJ
ajst-8276	29	37	function	function	NOUN
ajst-8276	29	38	,	,	PUNCT
ajst-8276	29	39	basically	basically	ADV
ajst-8276	29	40	decaying	decay	VERB
ajst-8276	29	41	to	to	ADP
ajst-8276	29	42	a	a	DET
ajst-8276	29	43	minimal	minimal	ADJ
ajst-8276	29	44	value	value	NOUN
ajst-8276	29	45	at	at	ADP
ajst-8276	29	46	0.2m~0.3	0.2m~0.3	NUM
ajst-8276	29	47	m	m	PROPN
ajst-8276	29	48	,	,	PUNCT
ajst-8276	29	49	with	with	ADP
ajst-8276	29	50	subsequent	subsequent	ADJ
ajst-8276	29	51	fluctuating	fluctuate	VERB
ajst-8276	29	52	attenuation	attenuation	NOUN
ajst-8276	29	53	trends	trend	NOUN
ajst-8276	29	54	.	.	PUNCT
ajst-8276	30	1	(	(	PUNCT
ajst-8276	30	2	2	2	X
ajst-8276	30	3	)	)	PUNCT
ajst-8276	30	4	the	the	DET
ajst-8276	30	5	amplitude	amplitude	NOUN
ajst-8276	30	6	of	of	ADP
ajst-8276	30	7	the	the	DET
ajst-8276	30	8	acoustic	acoustic	ADJ
ajst-8276	30	9	emission	emission	NOUN
ajst-8276	30	10	signal	signal	NOUN
ajst-8276	30	11	at	at	ADP
ajst-8276	30	12	longer	long	ADJ
ajst-8276	30	13	distances	distance	NOUN
ajst-8276	30	14	does	do	AUX
ajst-8276	30	15	not	not	PART
ajst-8276	30	16	simply	simply	ADV
ajst-8276	30	17	decrease	decrease	VERB
ajst-8276	30	18	but	but	CCONJ
ajst-8276	30	19	shows	show	VERB
ajst-8276	30	20	a	a	DET
ajst-8276	30	21	fluctuating	fluctuate	VERB
ajst-8276	30	22	trend	trend	NOUN
ajst-8276	30	23	and	and	CCONJ
ajst-8276	30	24	an	an	DET
ajst-8276	30	25	anomalous	anomalous	ADJ
ajst-8276	30	26	increasing	increase	VERB
ajst-8276	30	27	point	point	NOUN
ajst-8276	30	28	,	,	PUNCT
ajst-8276	30	29	which	which	PRON
ajst-8276	30	30	is	be	AUX
ajst-8276	30	31	due	due	ADJ
ajst-8276	30	32	to	to	ADP
ajst-8276	30	33	the	the	DET
ajst-8276	30	34	fact	fact	NOUN
ajst-8276	30	35	that	that	SCONJ
ajst-8276	30	36	the	the	DET
ajst-8276	30	37	acoustic	acoustic	ADJ
ajst-8276	30	38	emission	emission	NOUN
ajst-8276	30	39	signal	signal	NOUN
ajst-8276	30	40	undergoes	undergo	VERB
ajst-8276	30	41	a	a	DET
ajst-8276	30	42	certain	certain	ADJ
ajst-8276	30	43	degree	degree	NOUN
ajst-8276	30	44	of	of	ADP
ajst-8276	30	45	mode	mode	NOUN
ajst-8276	30	46	shift	shift	NOUN
ajst-8276	30	47	during	during	ADP
ajst-8276	30	48	transmission	transmission	NOUN
ajst-8276	30	49	,	,	PUNCT
ajst-8276	30	50	and	and	CCONJ
ajst-8276	30	51	the	the	DET
ajst-8276	30	52	waves	wave	NOUN
ajst-8276	30	53	of	of	ADP
ajst-8276	30	54	different	different	ADJ
ajst-8276	30	55	modes	mode	NOUN
ajst-8276	30	56	propagate	propagate	VERB
ajst-8276	30	57	at	at	ADP
ajst-8276	30	58	different	different	ADJ
ajst-8276	30	59	speeds	speed	NOUN
ajst-8276	30	60	and	and	CCONJ
ajst-8276	30	61	superimpose	superimpose	VERB
ajst-8276	30	62	on	on	ADP
ajst-8276	30	63	each	each	DET
ajst-8276	30	64	other	other	ADJ
ajst-8276	30	65	,	,	PUNCT
ajst-8276	30	66	resulting	result	VERB
ajst-8276	30	67	in	in	ADP
ajst-8276	30	68	an	an	DET
ajst-8276	30	69	anomalous	anomalous	ADJ
ajst-8276	30	70	increasing	increase	VERB
ajst-8276	30	71	point	point	NOUN
ajst-8276	30	72	.	.	PUNCT
ajst-8276	31	1	(	(	PUNCT
ajst-8276	31	2	3	3	X
ajst-8276	31	3	)	)	PUNCT
ajst-8276	31	4	the	the	PRON
ajst-8276	31	5	higher	high	ADJ
ajst-8276	31	6	the	the	DET
ajst-8276	31	7	pressure	pressure	NOUN
ajst-8276	31	8	,	,	PUNCT
ajst-8276	31	9	the	the	PRON
ajst-8276	31	10	greater	great	ADJ
ajst-8276	31	11	the	the	DET
ajst-8276	31	12	amplitude	amplitude	NOUN
ajst-8276	31	13	of	of	ADP
ajst-8276	31	14	the	the	DET
ajst-8276	31	15	acoustic	acoustic	ADJ
ajst-8276	31	16	emission	emission	NOUN
ajst-8276	31	17	signal	signal	NOUN
ajst-8276	31	18	,	,	PUNCT
ajst-8276	31	19	but	but	CCONJ
ajst-8276	31	20	its	its	PRON
ajst-8276	31	21	attenuation	attenuation	NOUN
ajst-8276	31	22	change	change	NOUN
ajst-8276	31	23	law	law	NOUN
ajst-8276	31	24	has	have	VERB
ajst-8276	31	25	nothing	nothing	PRON
ajst-8276	31	26	to	to	PART
ajst-8276	31	27	do	do	VERB
ajst-8276	31	28	with	with	ADP
ajst-8276	31	29	pressure	pressure	NOUN
ajst-8276	31	30	,	,	PUNCT
ajst-8276	31	31	different	different	ADJ
ajst-8276	31	32	pressure	pressure	NOUN
ajst-8276	31	33	have	have	VERB
ajst-8276	31	34	the	the	DET
ajst-8276	31	35	same	same	ADJ
ajst-8276	31	36	change	change	NOUN
ajst-8276	31	37	in	in	ADP
ajst-8276	31	38	attenuation	attenuation	NOUN
ajst-8276	31	39	change	change	NOUN
ajst-8276	31	40	law	law	NOUN
ajst-8276	31	41	,	,	PUNCT
ajst-8276	31	42	that	that	ADV
ajst-8276	31	43	is	is	ADV
ajst-8276	31	44	,	,	PUNCT
ajst-8276	31	45	the	the	DET
ajst-8276	31	46	attenuation	attenuation	NOUN
ajst-8276	31	47	characteristics	characteristic	NOUN
ajst-8276	31	48	and	and	CCONJ
ajst-8276	31	49	the	the	DET
ajst-8276	31	50	size	size	NOUN
ajst-8276	31	51	of	of	ADP
ajst-8276	31	52	the	the	DET
ajst-8276	31	53	leak	leak	NOUN
ajst-8276	31	54	pressure	pressure	NOUN
ajst-8276	31	55	.	.	PUNCT
ajst-8276	32	1	references	reference	NOUN
ajst-8276	32	2	[	[	X
ajst-8276	32	3	1	1	X
ajst-8276	32	4	]	]	PUNCT
ajst-8276	32	5	wang	wang	PROPN
ajst-8276	32	6	h	h	PROPN
ajst-8276	32	7	,	,	PUNCT
ajst-8276	32	8	fan	fan	PROPN
ajst-8276	32	9	xq	xq	PROPN
ajst-8276	32	10	.	.	PUNCT
ajst-8276	32	11	challenges	challenge	NOUN
ajst-8276	32	12	and	and	CCONJ
ajst-8276	32	13	countermeasures	countermeasure	NOUN
ajst-8276	32	14	for	for	ADP
ajst-8276	32	15	increasing	increase	VERB
ajst-8276	32	16	natural	natural	ADJ
ajst-8276	32	17	gas	gas	NOUN
ajst-8276	32	18	exploration	exploration	NOUN
ajst-8276	32	19	and	and	CCONJ
ajst-8276	32	20	development	development	NOUN
ajst-8276	32	21	in	in	ADP
ajst-8276	32	22	china[j	china[j	PROPN
ajst-8276	32	23	]	]	PUNCT
ajst-8276	32	24	.	.	PUNCT
ajst-8276	33	1	china	china	PROPN
ajst-8276	33	2	petrochemicals,2021(10):29	petrochemicals,2021(10):29	PROPN
ajst-8276	33	3	-	-	PUNCT
ajst-8276	33	4	34	34	NUM
ajst-8276	33	5	.	.	PUNCT
ajst-8276	34	1	[	[	X
ajst-8276	34	2	2	2	NUM
ajst-8276	34	3	]	]	PUNCT
ajst-8276	34	4	zhang	zhang	PROPN
ajst-8276	34	5	chunyu	chunyu	PROPN
ajst-8276	34	6	,	,	PUNCT
ajst-8276	34	7	li	li	PROPN
ajst-8276	34	8	lianpeng	lianpeng	PROPN
ajst-8276	34	9	,	,	PUNCT
ajst-8276	34	10	wang	wang	PROPN
ajst-8276	34	11	shuo	shuo	PROPN
ajst-8276	34	12	et	et	PROPN
ajst-8276	34	13	al	al	PROPN
ajst-8276	34	14	.	.	PROPN
ajst-8276	34	15	overview	overview	NOUN
ajst-8276	34	16	of	of	ADP
ajst-8276	34	17	the	the	DET
ajst-8276	34	18	development	development	NOUN
ajst-8276	34	19	of	of	ADP
ajst-8276	34	20	special	special	ADJ
ajst-8276	34	21	materials	material	NOUN
ajst-8276	34	22	for	for	ADP
ajst-8276	34	23	polyethylene	polyethylene	NOUN
ajst-8276	34	24	gas	gas	NOUN
ajst-8276	34	25	pipes	pipe	NOUN
ajst-8276	34	26	at	at	ADP
ajst-8276	34	27	home	home	NOUN
ajst-8276	34	28	and	and	CCONJ
ajst-8276	34	29	abroad[j	abroad[j	NOUN
ajst-8276	34	30	]	]	PUNCT
ajst-8276	34	31	.	.	PUNCT
ajst-8276	35	1	elastomers,2013,23(5):67	elastomers,2013,23(5):67	PROPN
ajst-8276	35	2	-	-	PUNCT
ajst-8276	35	3	73	73	NUM
ajst-8276	35	4	.	.	PUNCT
ajst-8276	36	1	[	[	X
ajst-8276	36	2	3	3	X
ajst-8276	36	3	]	]	X
ajst-8276	36	4	cruz	cruz	NOUN
ajst-8276	36	5	r	r	NOUN
ajst-8276	36	6	p	p	PROPN
ajst-8276	36	7	d	d	PROPN
ajst-8276	36	8	,	,	PUNCT
ajst-8276	36	9	flávio	flávio	NOUN
ajst-8276	36	10	vasconcelos	vasconcelos	PROPN
ajst-8276	36	11	da	da	PROPN
ajst-8276	36	12	silva	silva	PROPN
ajst-8276	36	13	,	,	PUNCT
ajst-8276	36	14	fileti	fileti	VERB
ajst-8276	36	15	a	a	PRON
ajst-8276	36	16	m	m	PROPN
ajst-8276	36	17	f.	f.	PROPN
ajst-8276	36	18	machine	machine	NOUN
ajst-8276	36	19	learning	learning	NOUN
ajst-8276	36	20	and	and	CCONJ
ajst-8276	36	21	acoustic	acoustic	ADJ
ajst-8276	36	22	method	method	NOUN
ajst-8276	36	23	applied	apply	VERB
ajst-8276	36	24	to	to	PART
ajst-8276	36	25	leak	leak	VERB
ajst-8276	36	26	detection	detection	NOUN
ajst-8276	36	27	and	and	CCONJ
ajst-8276	36	28	location	location	NOUN
ajst-8276	36	29	in	in	ADP
ajst-8276	36	30	low	low	ADJ
ajst-8276	36	31	-	-	PUNCT
ajst-8276	36	32	pressure	pressure	NOUN
ajst-8276	36	33	gas	gas	NOUN
ajst-8276	36	34	pipelines[j	pipelines[j	PROPN
ajst-8276	36	35	]	]	PUNCT
ajst-8276	36	36	.	.	PUNCT
ajst-8276	37	1	clean	clean	ADJ
ajst-8276	37	2	technologies	technology	NOUN
ajst-8276	37	3	and	and	CCONJ
ajst-8276	37	4	environmental	environmental	ADJ
ajst-8276	37	5	policy	policy	NOUN
ajst-8276	37	6	,	,	PUNCT
ajst-8276	37	7	2020	2020	NUM
ajst-8276	37	8	,	,	PUNCT
ajst-8276	37	9	22(3):627	22(3):627	NOUN
ajst-8276	37	10	-	-	PUNCT
ajst-8276	37	11	638	638	NUM
ajst-8276	37	12	.	.	PUNCT
ajst-8276	38	1	[	[	X
ajst-8276	38	2	4	4	X
ajst-8276	38	3	]	]	X
ajst-8276	38	4	zhang	zhang	PROPN
ajst-8276	38	5	xi	xi	PROPN
ajst-8276	38	6	,	,	PUNCT
ajst-8276	38	7	zhang	zhang	PROPN
ajst-8276	38	8	lanzhu	lanzhu	PROPN
ajst-8276	38	9	.	.	PUNCT
ajst-8276	39	1	acoustic	acoustic	ADJ
ajst-8276	39	2	emission	emission	NOUN
ajst-8276	39	3	attenuation	attenuation	NOUN
ajst-8276	39	4	characteristics	characteristic	NOUN
ajst-8276	39	5	of	of	ADP
ajst-8276	39	6	pipeline	pipeline	NOUN
ajst-8276	39	7	leakage	leakage	NOUN
ajst-8276	39	8	localization	localization	NOUN
ajst-8276	39	9	method[j	method[j	NOUN
ajst-8276	39	10	]	]	PUNCT
ajst-8276	39	11	.	.	PUNCT
ajst-8276	40	1	applied	apply	VERB
ajst-8276	40	2	acoustics,2022,41(01):158	acoustics,2022,41(01):158	PROPN
ajst-8276	40	3	-	-	PUNCT
ajst-8276	40	4	167	167	NUM
ajst-8276	40	5	.	.	PUNCT
ajst-8276	41	1	[	[	X
ajst-8276	41	2	5	5	NUM
ajst-8276	41	3	]	]	X
ajst-8276	41	4	hou	hou	PROPN
ajst-8276	41	5	dong	dong	PROPN
ajst-8276	41	6	sheng	sheng	PROPN
ajst-8276	41	7	.	.	PUNCT
ajst-8276	42	1	research	research	NOUN
ajst-8276	42	2	on	on	ADP
ajst-8276	42	3	phased	phase	VERB
ajst-8276	42	4	-	-	PUNCT
ajst-8276	42	5	array	array	NOUN
ajst-8276	42	6	focused	focus	VERB
ajst-8276	42	7	acoustic	acoustic	ADJ
ajst-8276	42	8	field	field	NOUN
ajst-8276	42	9	of	of	ADP
ajst-8276	42	10	thick	thick	ADJ
ajst-8276	42	11	-	-	PUNCT
ajst-8276	42	12	walled	wall	VERB
ajst-8276	42	13	polyethylene	polyethylene	NOUN
ajst-8276	42	14	pipe	pipe	NOUN
ajst-8276	42	15	electrofusion	electrofusion	NOUN
ajst-8276	42	16	joints	joint	NOUN
ajst-8276	42	17	in	in	ADP
ajst-8276	42	18	nuclear	nuclear	ADJ
ajst-8276	42	19	power	power	NOUN
ajst-8276	42	20	plants[d	plants[d	ADV
ajst-8276	42	21	]	]	PUNCT
ajst-8276	42	22	.	.	PUNCT
ajst-8276	43	1	zhejiang	zhejiang	PROPN
ajst-8276	43	2	university,2017	university,2017	PROPN
ajst-8276	43	3	.	.	PUNCT
ajst-8276	44	1	[	[	X
ajst-8276	44	2	6	6	NUM
ajst-8276	44	3	]	]	PUNCT
ajst-8276	44	4	wang	wang	PROPN
ajst-8276	44	5	yao	yao	PROPN
ajst-8276	44	6	,	,	PUNCT
ajst-8276	44	7	liu	liu	PROPN
ajst-8276	44	8	caixue	caixue	PROPN
ajst-8276	44	9	,	,	PUNCT
ajst-8276	44	10	he	he	PRON
ajst-8276	44	11	pan	pan	VERB
ajst-8276	44	12	et	et	PROPN
ajst-8276	44	13	al	al	PROPN
ajst-8276	44	14	.	.	PROPN
ajst-8276	44	15	study	study	NOUN
ajst-8276	44	16	on	on	ADP
ajst-8276	44	17	the	the	DET
ajst-8276	44	18	attenuation	attenuation	NOUN
ajst-8276	44	19	characteristics	characteristic	NOUN
ajst-8276	44	20	of	of	ADP
ajst-8276	44	21	pipe	pipe	NOUN
ajst-8276	44	22	acoustic	acoustic	ADJ
ajst-8276	44	23	emission	emission	NOUN
ajst-8276	44	24	signals	signal	NOUN
ajst-8276	44	25	with	with	ADP
ajst-8276	44	26	wall	wall	PROPN
ajst-8276	44	27	thickness[j	thickness[j	PROPN
ajst-8276	44	28	]	]	PUNCT
ajst-8276	44	29	.	.	PUNCT
ajst-8276	45	1	vibration	vibration	NOUN
ajst-8276	45	2	.	.	PUNCT
ajst-8276	46	1	test	test	NOUN
ajst-8276	46	2	and	and	CCONJ
ajst-8276	46	3	diagnosis,2022,42(03):588592	diagnosis,2022,42(03):588592	PROPN
ajst-8276	46	4	+	+	NOUN
ajst-8276	46	5	623	623	NUM
ajst-8276	46	6	.	.	PUNCT
ajst-8276	47	1	[	[	X
ajst-8276	47	2	7	7	X
ajst-8276	47	3	]	]	X
ajst-8276	47	4	zhang	zhang	PROPN
ajst-8276	47	5	xi	xi	PROPN
ajst-8276	47	6	,	,	PUNCT
ajst-8276	47	7	zhang	zhang	PROPN
ajst-8276	47	8	lanzhu	lanzhu	PROPN
ajst-8276	47	9	.	.	PUNCT
ajst-8276	48	1	acoustic	acoustic	ADJ
ajst-8276	48	2	emission	emission	NOUN
ajst-8276	48	3	attenuation	attenuation	NOUN
ajst-8276	48	4	characteristics	characteristic	NOUN
ajst-8276	48	5	of	of	ADP
ajst-8276	48	6	pipeline	pipeline	NOUN
ajst-8276	48	7	leakage	leakage	NOUN
ajst-8276	48	8	localization	localization	NOUN
ajst-8276	48	9	method[j	method[j	NOUN
ajst-8276	48	10	]	]	PUNCT
ajst-8276	48	11	.	.	PUNCT
ajst-8276	49	1	applied	apply	VERB
ajst-8276	49	2	acoustics,2022,41(01):158	acoustics,2022,41(01):158	PROPN
ajst-8276	49	3	-	-	PUNCT
ajst-8276	49	4	167	167	NUM
ajst-8276	49	5	.	.	PUNCT
ajst-8276	50	1	[	[	X
ajst-8276	50	2	8	8	NUM
ajst-8276	50	3	]	]	X
ajst-8276	50	4	zhou	zhou	PROPN
ajst-8276	50	5	jinjie	jinjie	PROPN
ajst-8276	50	6	,	,	PUNCT
ajst-8276	50	7	zheng	zheng	PROPN
ajst-8276	50	8	yang	yang	PROPN
ajst-8276	50	9	,	,	PUNCT
ajst-8276	50	10	zhang	zhang	PROPN
ajst-8276	50	11	zongjian	zongjian	PROPN
ajst-8276	50	12	et	et	PROPN
ajst-8276	50	13	al.study	al.study	VERB
ajst-8276	50	14	on	on	ADP
ajst-8276	50	15	the	the	DET
ajst-8276	50	16	effect	effect	NOUN
ajst-8276	50	17	of	of	ADP
ajst-8276	50	18	defective	defective	ADJ
ajst-8276	50	19	scattering	scattering	NOUN
ajst-8276	50	20	on	on	ADP
ajst-8276	50	21	phased	phase	VERB
ajst-8276	50	22	-	-	PUNCT
ajst-8276	50	23	array	array	NOUN
ajst-8276	50	24	ultrasound	ultrasound	NOUN
ajst-8276	50	25	total	total	ADJ
ajst-8276	50	26	focus	focus	NOUN
ajst-8276	50	27	imaging	imaging	NOUN
ajst-8276	50	28	[	[	X
ajst-8276	50	29	j	j	X
ajst-8276	50	30	]	]	X
ajst-8276	50	31	.	.	PUNCT
ajst-8276	51	1	journal	journal	PROPN
ajst-8276	51	2	of	of	ADP
ajst-8276	51	3	instrumentation	instrumentation	NOUN
ajst-8276	51	4	,	,	PUNCT
ajst-8276	51	5	2017	2017	NUM
ajst-8276	51	6	,	,	PUNCT
ajst-8276	51	7	38(02):454	38(02):454	NUM
ajst-8276	51	8	-	-	SYM
ajst-8276	51	9	461	461	NUM
ajst-8276	51	10	.	.	PUNCT