魏俊杰主要贡献

论著成果：1.Wei Junjie and Ruan Shigui, Stability and bifurcation in a neural network model with two delays, Physica D ,130(1999)255-272。2.Ruan Shigui and Wei Junjie, Periodic solutions of planar systems with two delays, Pro. Roy. Soci. Ediburgh ,129A(1999) 1017-1032。3.Wei Junjie and Huang Qichang, Global existence of periodic solutions of Lienard equations with finite delay, Dynamics of Continuous, Discrete and Impulsive Systems,6(1999)603-614。4.蒋达清，魏俊杰，非自治时滞微分方程周期解的存在性，数学年刊，20A(1999)6:715-720。5.Ruan Shigui and Wei Junjie, On the zeros of a third degree exponential polynomial with applications to a delayed model for the control of testosterone secretion, IMA. J.Math. Appl. Med. Bio,18(2001)41-52。6.魏俊杰，阮士贵，中立型微分方程零解的稳定性与全局 Hopf 分支，数学学报，45（2002）1：93-104。7.Jiang Daqing and Wei Junjie, Monotone method for periodic boundary value problem and periodic solution of FDEs, Nonlinear Analysis,50(2002)885-898。8.Wei Junjie, Velarde. M and Markarov.V, Oscilatory phenomena and stability of periodic solutions in a simple neural network with delay, Nonlinear Phenomena in Complex Systems, 5(200)4:407-417。9.Zhang Ruyuan, Wei Junjie and Wu Jianhong, Subharmonic solutions of systems of difference equations with periodic perturbations. Part I: Existence, J. Math. Anal. Appl. 275(2002)495-511。10.Zhang Ruyuan, Wei Junjie and Wu Jianhong, On subharmonic solutions of systems of difference equations with periodic perturbations. Part II: Multiplicity and stability, J. Math.Anal. Appl. 276(2002)477-496。

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