id	sid	eid	entity	type
ajrhss-3200	1	1	american journal of research	ORG
ajrhss-3200	1	2	social sciences issn	ORG
ajrhss-3200	1	3	2832-8019	CARDINAL
ajrhss-3200	1	4	43	CARDINAL
ajrhss-3200	1	5	december 2025	DATE
ajrhss-3200	2	1	4	CARDINAL
ajrhss-3200	2	2	nortojiyevich terdu	PERSON
ajrhss-3200	3	1	subharmonic	ORG
ajrhss-3200	3	2	superharmonic resonance	ORG
ajrhss-3200	4	1	van der pol	PERSON
ajrhss-3200	6	1	van der pol oscillations	PERSON
ajrhss-3200	13	1	linear	ORG
ajrhss-3200	16	1	american journal of research	ORG
ajrhss-3200	16	2	social sciences	ORG
ajrhss-3200	16	3	43	CARDINAL
ajrhss-3200	16	4	december 2025	DATE
ajrhss-3200	17	1	5	CARDINAL
ajrhss-3200	17	2	1	CARDINAL
ajrhss-3200	19	1	2	CARDINAL
ajrhss-3200	20	1	3	CARDINAL
ajrhss-3200	21	1	one	CARDINAL
ajrhss-3200	27	1	•	CARDINAL
ajrhss-3200	27	2	•	CARDINAL
ajrhss-3200	27	3	•	CARDINAL
ajrhss-3200	27	4	•	CARDINAL
ajrhss-3200	27	5	•	CARDINAL
ajrhss-3200	27	6	•	CARDINAL
ajrhss-3200	27	7	•	CARDINAL
ajrhss-3200	27	8	linear systems	ORG
ajrhss-3200	30	1	linear systems	ORG
ajrhss-3200	31	1	1	CARDINAL
ajrhss-3200	31	2	2	CARDINAL
ajrhss-3200	32	1	3	CARDINAL
ajrhss-3200	32	2	4	CARDINAL
ajrhss-3200	33	1	the van der pol oscillator	FAC
ajrhss-3200	33	2	\ddot{x}-\mu(1-x^2)\dot{x	ORG
ajrhss-3200	36	1	linear convergence	ORG
ajrhss-3200	40	1	american journal of research	ORG
ajrhss-3200	40	2	social sciences	ORG
ajrhss-3200	40	3	43	CARDINAL
ajrhss-3200	40	4	december 2025	DATE
ajrhss-3200	40	5	6	CARDINAL
ajrhss-3200	40	6	subharmonic	ORG
ajrhss-3200	46	1	1	CARDINAL
ajrhss-3200	47	1	nayfeh a.h.	ORG
ajrhss-3200	47	2	mook d.t.	ORG
ajrhss-3200	48	1	wiley-interscience	ORG
ajrhss-3200	49	1	2	CARDINAL
ajrhss-3200	49	2	verhulst f. nonlinear	PERSON
ajrhss-3200	51	1	3	CARDINAL
ajrhss-3200	51	2	stoker j.j.	PERSON
ajrhss-3200	52	1	wiley	PERSON
ajrhss-3200	53	1	khalil h. nonlinear systems	ORG
ajrhss-3200	54	1	prentice hall	ORG
ajrhss-3200	55	1	5	CARDINAL
ajrhss-3200	55	2	bogoliubov n.	PERSON
ajrhss-3200	55	3	mitropolsky y. asymptotic methods	PERSON
ajrhss-3200	56	1	6	CARDINAL
ajrhss-3200	56	2	kovacic i.	PERSON
ajrhss-3200	56	3	brennan m.	PERSON
ajrhss-3200	57	1	van der pol b.	PERSON
ajrhss-3200	58	1	8	CARDINAL
ajrhss-3200	58	2	nayfeh a.h.	ORG