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Akademický článek

Coexistence of Algebraic Limit Cycles and Small Limit Cycles of Two Classes of Near-Hamiltonian Systems with a Nilpotent Singular Point

Autor: Huimei Liu, Meilan Cai, Feng Li

Publikováno v: Axioms, Vol 13, Iss 9, p 593 (2024)

In this paper, two classes of near-Hamiltonian systems with a nilpotent center are considered: the coexistence of algebraic limit cycles and small limit cycles. For the first class of systems, there exist 2n+1 limit cycles, which include an algebraic

Externí odkaz: https://doaj.org/article/575755fd3d2c46ad96b4c28bcde2fcfb

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Limit cycle bifurcations in a class of piecewise smooth cubic systems with multiple parameters

Autor: Meilan Cai, Maoan Han

Publikováno v: Communications on Pure & Applied Analysis. 20:55-75

In this paper, we concern with the problem of limit cycle bifurcation for a class of piecewise smooth cubic systems. Using the first order Melnikov function we prove that at least thirteen limit cycles can be bifurcated from periodic solutions surrou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3d08d09b8ea0c69a0c1cea89995ffacf
https://doi.org/10.3934/cpaa.2020257

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The Number of Limit Cycles for a Class of Cubic Systems with Multiple Parameters

Autor: Meilan Cai, Maoan Han

Publikováno v: International Journal of Bifurcation and Chaos. 32

In this paper, we study the number of limit cycles for a class of cubic systems with general quadratic polynomial perturbations. By using the Melnikov function theory we obtain that five limit cycles can be bifurcated from a period annulus. We also s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::862ad93eaa30b1854a30c0979ddb5983
https://doi.org/10.1142/s0218127422500729

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Limit Cycle Bifurcations in a Class of Piecewise Smooth Polynomial Systems

Autor: Meilan Cai, Maoan Han

Publikováno v: International Journal of Bifurcation and Chaos. 31

In this paper, we consider the bifurcation problem of limit cycles for a class of piecewise smooth cubic systems separated by the straight line [Formula: see text]. Using the first order Melnikov function, we prove that at least [Formula: see text] l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9cf3d89fa878c960f869f94c010780bd
https://doi.org/10.1142/s0218127421502187

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Professional Self-Development Based on Informal Learning: A Case Study of Foreign Language Teachers in a University of China

Autor: Meilan Cai

Publikováno v: Open Journal of Social Sciences. :26-38

Teachers at all stages of their careers need to engage in lifelong learning to keep abreast with the changing and challenging pedagogical environment. The purpose of the study is to find out how informal learning helps experienced English teachers te

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5666740678f28c4b70f0186157d9d6b7
https://doi.org/10.4236/jss.2019.712003

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Corneal differences between healthy and subclinical patients assessed using two diferente corneal tomographers

Autor: Zhaoge Wang, Meilan Cai, Xiaotong Han, Ruifang Wang, Ruichun Ge, Yi Sun, Zhaoping Yang, Haixia Zhao, Wenying Guan

Publikováno v: Arquivos Brasileiros de Oftalmologia, Volume: 83, Issue: 2, Pages: 92-97, Published: 25 NOV 2019
Arquivos Brasileiros de Oftalmologia, Vol 83, Iss 2, Pp 92-97 (2019)
Arquivos Brasileiros de Oftalmologia v.83 n.2 2020
Arquivos brasileiros de oftalmologia
Conselho Brasileiro de Oftalmologia (CBO)
instacron:CBO
Arquivos Brasileiros de Oftalmologia, Issue: ahead, Published: 25 NOV 2019

Purpose: To analyze subclinical keratoconus topography indexes using Pentacam and Orbscan-II measurements to identify evidences for seeking sensitive indexes to screen and diagnose subclinical keratoconus. Methods: Fifty healthy participants (50 eyes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c123567b4b6ee241512039e62848498
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27492020000200092&lng=en&tlng=en

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Akademický článek

Corneal differences between healthy and subclinical patients assessed using two different corneal tomographers.

Autor: Haixia Zhao, Zhaoping Yang, Xiaotong Han, Wenying Guan, Zhaoge Wang, Meilan Cai, Yi Sun, Ruichun Ge, Ruifang Wang

Publikováno v: Arquivos Brasileiros de Oftalmologia; Mar/Apr2020, Vol. 83 Issue 2, p92-97, 6p

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