魏俊杰 - 哈尔滨工业大学（威海）

个人简介

工作经历 1978年9月-1986年8月东北师范大学数学系，助教 1986年9月-1988年8月东北师范大学数学系，讲师 1988年9月-1994年8月东北师范大学数学系，副教授 1994年9月-2001年12月东北师范大学数学系，教授 2001年3月-2005年9月东北师范大学数学系，博士生导师 2002年1月-目前哈尔滨工业大学数学系，教授，博士生导师 1993年5月---1994年2月加拿大 York大学，访问学者 1997年9月---1998年4月加拿大 Dalhousie大学，访问学者 2000年5月---2000年7月美国 Mississippi 州立大学，访问学者 2002年1月---2003年1月西班牙马德里 Complutense大学，博士后 2003年以来多次访问加拿大的 Alberta大学和 Memorial大学教育经历 1975年-1978年, 毕业于东北师范大学数学系 1992年-1995年, 毕业于吉林大学数学研究所，获博士学位科研项目非线性泛函微分方程的理论及应用时滞微分方程得分支理论及应用泛函微分方程的分支理论及应用时滞动力系统中的分支理论及其应用时滞微分方程与离散系统的定性理论及相关问题时滞反应扩散方程分支理论中的若干问题研究时滞反应扩散方程的动力学理论中的几个问题奖项名称常微分方程及泛函微分方程周期解、稳定性及振动解研究泛函微分方程分支与周期解研究泛函微分方程分支理论及应用无穷维动力系统中的分支理论及应用半线性偏微分方程的分支理论及其应用非线性演化系统的行波解和渐近传播速度研究生教育突出贡献奖生命科学中几类时滞微分方程模型的动力学性质分析时滞反应扩散方程的分支理论及其应用

研究领域

(1) 时滞微分方程的理论及其应用，包括时滞微分方程的振动理论，稳定性理论，分支理论和解映射的复杂性等；应用包括建立和改进在生态学，神经科学，物理学及化学等领域中提出的时滞微分方程的数学模型，进而以泛函微分方程理论为基础，对相应的数学模型加以研究，再用所得数学结果对该数学模型刻画的实际过程给出数学解释并预测其发展趋势。通过对有实际背景的时滞微分方程的研究，也进一步完善发展泛函微分方程的理论。 (2) 具时滞的反应扩散方程的分支理论及应用，包括反应扩散方程的稳态解分支，Turing不稳定性，Hopf分支，周期解的大范围存在性以及有实际背景的时滞反应扩散方程的动力学性质分析。

近期论文

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Duan Daifeng, Niu Ben and Wei Junjie, Local and global Hopf bifurcation in a neutral population model with age structure, MATHEMATICAL METHODS IN THE APPLIED SCIENCES, 42(2019) 14: 4747-4764. Duan Daifeng, Niu Ben and Wei Junjie, Coexistence of Periodic Oscillations Induced by Predator Cannibalism in a Delayed Diffusive Predator-Prey Model, INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, 29 (2019) 7, 文献号: 1950089. Li Na and Wei Junjie, Bifurcation analysis in a nonlinear electro-optical oscillator with delayed bandpass feedback, NONLINEAR DYNAMICS, 96 (2019) 1: 483-496. Wang, Chuncheng; Wei, Junjie, Hopf Bifurcations for Neutral Functional Differential Equations with Infinite Delays, FUNKCIALAJ EKVACIOJ-SERIO INTERNACIA, 62 (2019) 1: 95-127. Liang Jitai and Wei Junjie, Lyapunov functional for virus infection model with diffusion and state-dependent delays, MATHEMATICAL BIOSCIENCES AND ENGINEERING, 16 (2019) 2: 947-966. Pan Yingli, Su Ying and Wei Junjie, Accelerating propagation in a recursive system arising from seasonal population models with nonlocal dispersal. J. Differential Equations，267 (2019), no. 1, 150–179. Chen Shanshan, Wei Junjie and Yang Kaiqi, Spatial nonhomogeneous periodic solutions induced by nonlocal prey competition in a diffusive predator-prey model. Internat. J. Bifur. Chaos Appl. Sci. Engrg. 29 (2019), no. 4, 1950043, 19 pp. Duan Daifeng, Niu Ben and Wei Junjie, Hopf-Hopf bifurcation and chaotic attractors in a delayed diffusive predator-prey model with fear effect. Chaos Solitons Fractals 123(2019), 206–216. Chen Shanshan, Yang Hong and Wei Junjie, Global dynamics of two phytoplankton-zooplankton models with toxic substances effect. J. Appl. Anal. Comput. 9 (2019) 2: 796–809. Pan Yingli, Su Ying and Wei Junjie, Bistable waves of a recursive system arising from seasonal age-structured population models. Discrete Contin. Dyn. Syst. Ser. B 24(2019) 2: 511–528. Wang Xuechen, Wu Haixiu and Wei Junjie,On distribution of the roots for an exponential polynomial equation with applications, Appl. Math. Lett. 90 (2019), 36–41. Du Yanfei, Niu Ben and Wei Junjie, Two delays induce Hopf bifurcation and double Hopf bifurcation in a diffusive Leslie-Gower predator-prey system. Chaos, 29 (2019), 1, 013101, 16 pp. Yang Hong and Wei Junjie, Global behaviours of an in-host viral model with general incidence terms. Appl. Anal. 97 (2018) 14: 2431–2449. Chen Shanshan, Wei Junjie and Zhang Jianhui, Dynamics of a diffusive predator-prey model: the effect of conversion rate. J. Dynam. Differential Equations 30 (2018) 4: 1683–1701. Wei Xin and Wei Junjie, The effect of delayed feedback on the dynamics of an autocatalysis reaction-diffusion system. Nonlinear Anal. Model. Control 23 (2018) 5: 749–770. Pan Yingli, Fang Jian and Wei Junjie, SEASONAL INFLUENCE ON AGE-STRUCTURED INVASIVE SPECIES WITH YEARLY GENERATION, SIAM J. APPL. MATH. 78(2018) 3: 1842-1862. Hao Pengmiao, Wang Xuechen and Wei Junjie, Hopf bifurcation analysis of a diffusive single species model with stage structure and strong Allee effect, Mathematics and Computers in Simulation, 153(2018) 1-14. Niu Ben, Zhang Jiaming and Wei Junjie, Multiple-parameter bifurcation analysis in a Kuramoto model with time delay and distributed shear, AIP ADVANCES, 8(2018)5 文献号: 055111. Yang Hong and Wei Junjie, Note on the stability of reaction–diffusion systems with delays by Lyapunov functional, Applied Mathematics Letters 83 (2018) 151–155. Chen Shanshan, Lou Yuan and Wei Junjie, Hopf bifurcation in a delayed reaction-diffusion-advection population model, JOURNAL OF DIFFERENTIAL EQUATIONS, 264(2018) 8: 5333-5359. Shen Zuolin and Wei Junjie, HOPF BIFURCATION ANALYSIS IN A DIFFUSIVE PREDATOR-PREY SYSTEM WITH DELAY AND SURPLUS KILLING EFFECT, MATHEMATICAL BIOSCIENCES AND ENGINEERING, 15(2018) 3: 693-715. Xu Xiaofeng and Wei Junjie, TURING-HOPF BIFURCATION OF A CLASS OF MODIFIED LESLIE-GOWER MODEL WITH DIFFUSION, DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B, 23(2018) 2: 765-783. Chen Shanshan, Wei Junjie and Yu Jinzhu, Stationary patterns of a diffusive predator-prey model with Crowley-Martin functional response , NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS, 39(2018) 33-57. Fan, Dejun, Hao Pengmiao, Sun Dongyan and Wei Junjie, Global stability of multi-group SEIRS epidemic models with vaccination, INTERNATIONAL JOURNAL OF BIOMATHEMATICS, 11(2018)1 文献号: 1850006. Wei Xin and Wei Junjie, Stability and Bifurcation Analysis in the Photosensitive CDIMA System with Delayed Feedback Control, INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, 27(2017) 11 文献号: 1750177. Hao, Pengmiao; Wang, Xuechen; Wei, Junjie, GLOBAL HOPF BIFURCATION OF A POPULATION MODEL WITH STAGE STRUCTURE AND STRONG ALLEE EFFECT, DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES S, 10(2017) 5: 973-993 . Wei Xin and Wei Junjie, Turing instability and bifurcation analysis in a diffusive bimolecular system with delayed feedback, COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION, 50(2017): 241-255. Xu Xiaofeng and Wei Junjie, Bifurcation analysis of a spruce budworm model with diffusion and physiological structures, JOURNAL OF DIFFERENTIAL EQUATIONS, 262(2017) 10: 5206-5230. Yang Ruizhi and Wei Junjie, The Effect of Delay on A Diffusive Predator-Prey System with Modified Leslie-Gower Functional Response, BULLETIN OF THE MALAYSIAN MATHEMATICAL SCIENCES SOCIETY, 40(2017) 1: 51-73. Hao Pengmiao, Wei Junjie and Fan Dejun, Analysis of dynamics in an eco-epidemiological model with stage structure , ADVANCES IN DIFFERENCE EQUATIONS, 文献号: 223 (2016). Wei Xin and Wei Junjie, Neimark-Sacker bifurcation analysis in a discrete neutral Nicholson@#%s blowflies system with delay, JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS, 22(2016) 7: 865-877. Wang Luxuan, Niu Ben and Wei Junjie, Dynamical analysis for a model of asset prices with two delays, PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 447 (2016) 297-313. Jiang Zhichao, Ma Wanbiao and Wei Junjie, Global Hopf bifurcation and permanence of a delayed SEIRS epidemic model, MATHEMATICS AND COMPUTERS IN SIMULATION, 122(2016) 35-54. Zhao Jiantao, Tian Jianjun Paul and Wei Junjie, Minimal Model of Plankton Systems Revisited with Spatial Diffusion and Maturation Delay, BULLETIN OF MATHEMATICAL BIOLOGY, 78(2016) 3: 381-412. Zhao Jiantao, Wei Junjie, Persistence, Turing Instability and Hopf Bifurcation in a Diffusive Plankton System with Delay and Quadratic Closure, INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, 26 (2016) 3: 文献号: 1650047. Wang Jinfeng, Wei Junjie and Shi Junping, Global bifurcation analysis and pattern formation in homogeneous diffusive predator-prey systems, JOURNAL OF DIFFERENTIAL EQUATIONS, 260 (2016) 4: 3495-3523. Zhu Gang, Wei Junjie, Global stability and bifurcation analysis of a delayed predator-prey system with prey immigration, ELECTRONIC JOURNAL OF QUALITATIVE THEORY OF DIFFERENTIAL EQUATIONS , (2016) 13 : 1-20. Sun Xinguo, Wei Junjie, Stability and bifurcation analysis in a viral infection model with delays, ADVANCES IN DIFFERENCE EQUATIONS , (2015) 文献号: 332. Yang Hong, Wei Junjie, Analyzing global stability of a viral model with general incidence rate and cytotoxic T lymphocytes immune response, NONLINEAR DYNAMICS, 82 (2015) 1-2: 713-722. Sun Xinguo, Wei Junjie, Global existence of periodic solutions in an infection model, APPLIED MATHEMATICS LETTERS , 48(2015) 118-123. Yang Hong, Wei Junjie, GLOBAL BEHAVIOUR OF A DELAYED VIRAL KINETIC MODEL WITH GENERAL INCIDENCE RATE, DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B, 20(2015)5: 1573-1582. Chang Xiaoyuan, Wei Junjie, Bifurcation Analysis in an n-Dimensional Diffusive Competitive Lotka-Volterra System with Time Delay, INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, 25(2015) 6 文献号: 1550089 Zhao Jiantao; Wei Junjie， Dynamics in a diffusive plankton system with delay and toxic substances effect，NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS， 22 （2015） 66-83. Wang Xuechen; Wei Junjie, Dynamics in a diffusive predator-prey system with strong Allee effect and Ivlev-type functional response, JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, 422(2015) 2: 1447-1462. Yang Ruizhi; Wei Junjie, Bifurcation analysis of a diffusive predator-prey system with nonconstant death rate and Holling III functional response, CHAOS SOLITONS & FRACTALS , 70(2015) 1-13. Yang Ruizhi; Wei Junjie, Stability and bifurcation analysis of a diffusive prey predator system in Holling type III with a prey refuge, NONLINEAR DYNAMICS , 79 (2015) 1: 631-646. Chen Shanshan, Shi Junping, Wei Junjie, Bifurcation analysis of the Gierer-Meinhardt system with a saturation in the activator production, APPLICABLE ANALYSIS, 93(2014) 6: 1115-1134. Chen Shanshan; Wei Junjie, Global attractivity in a model of genetic regulatory system with delay, APPLIED MATHEMATICS AND COMPUTATION, 232(2014) 411-415. Li Michael Y.; Wang Chuncheng; Wei Junjie, Global Hopf Bifurcation Analysis of a Nicholson@#%s Blowflies Equation of Neutral Type, JOURNAL OF DYNAMICS AND DIFFERENTIAL EQUATIONS, 26(2014)1: 165-179. Chen Shanshan; Wei Junjie, Stability and bifurcation in a two variable delay model for circadian rhythm of Neurospora crassa, JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, 411(2014)1: 381-394. Zuo Wenjie， Wei Junjie， Stability and bifurcation in a ratio-dependent Holling-III system with diffusion and delay, NONLINEAR ANALYSIS-MODELLING AND CONTROL , 19(2014)1: 132-153. Jin Jiayin, Shi Junping, Wei Junjie and Yi Feng Qi, Bifurcation of patterned solutions in the diffusive Lengyel-Epstein system of cima chemical reactions, Rocky Mountain J. Math. 43(2013)1637-1674. Wang Jinfeng, Shi Junping and Wei Junjie, Nonexistence of periodic obits for predator-prey system with strong Allee effect in prey populations, Electronic J. Differential Equations, 文献号：164， 2013. Li Xiuling and Wei Junjie, Stability and bifurcation analysis in a system of four coupled neurons with multiple delays, ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 29 (2013)2: 425-447. Sun Xinguo and Wei Junjie, Global dynamics of a HTLV-I infection model with CTL response, Electronic Journal of Qualitative Theory of Differential Equations, 2013, No. 40, 1-15. Chang Xiaoyuan and Wei Junjie, Stability and Hopf bifurcation in a diffusive predator-prey system incorporating a pre refuge, Mathematical Biosciences and Engineering, 10 (2013) 4: 979–996. Li Michael Y and Wei Junjie, Global Hopf bifurcation analysis of a neuron network model with time delays, J. Mallet-Paret et al. (eds.) Infinite dimensional dynamical systems, 141–168, Fields Inst. Commun., 64, Springer, New York, 2013. Liu Jianxin and Wei Junjie, On Hopf bifurcation of a delayed predator-prey system with diffusion, International J. Bifurcation and Chaos, 23(2013)1: 1350023 (13 pages). Wang Yujie And Wei Junjie, Global dynamics of a cholera model with time delay, International J. Biomathematics 6 (2013) 1: 1250070 (18 pages). Wang Yujie, Jianjun Paul Tian and Wei Junjie, Lytic cycle: A defining process in oncolytic virotherapy, Applied Mathematical Modelling 37 (2013) 5962-5078. Wang Xuechen and Wei Junjie, Diffusion-driven stability and bifurcation in a predator-prey system with lvlev-type functional response, Applicable Analysis, 92(3013) 4: 752-775. Chen Shanshan, Shi Junping and Wei Junjie, Time Delay-Induced Instabilities and Hopf Bifurcations in General Reaction–Diffusion Systems, J. Nonlinear Science, 23(2013) 1: 1-38. Chen Shanshan, Shi Junping and Wei Junjie, The effect of delay o a diffusive predator-prey system with Holling type-II predator founctional response, Communications on Pure and Applied Analysis, 12(2013) 1 : 481-501. Su Ying, Wei Junjie and Shi Junping, Hopf bifurcation in a diffusive logistic equation with mixed delayed and instantaneous density dependence, J. Dynamics and Differential Equations, 24(2012) 4: 897-925. Chang Xiaoyuan and Wei Junjie, Hopf bifurcation and optimal control in a diffusive predator-prey system with time delay and prey harvesting, Nonlinear Analysis: Modelling and Control, 17(2012) 4: 379–409. Hao Pengmiao, Fan Dejun and Wei Junjie, Dynamic behaviors of s delayed HIV model with stage-structure, Communications in Nonlinear Science and Numerical Simulation, 17 (2012)12: 4753-4766. Zhu Gang and Wei Junjie, Synchronized Hopf bifurcation analysis in a delay-coupled semiconductor lasers system, J. Appl. Math. (2012) 文献号: 257635 DOI: 10.1155/2012/257635. Wang Jinfeng and Wei Junjie, Bifurcation analysis of a delayed predator–prey system with strong Allee effect and diffusion , Applicable Analysis, 91(2012) 7: 1219–1241. Chen Shanshan, Shi Junping and Wei Junjie, Global stability and Hopf bifurcation in a delayed diffusive Leslie-Gower predator-prey system, International Journal of Bifurcation and Chaos, 22 (2012) 3: 文献号: 1250061. Xu Chuang and Wei Junjie, On stability of two degenerate reaction diffusion systems, Journal of Mathematical Analysis and Applications, 390 (2012) 126–135. Xu Chuang and Wei Junjie, Hopf bifurcation analysis in a one-dimensional Schnakenberg reaction–diffusion model, Nonlinear Analysis: Real World Applications, 13 (2012) 1961–1977. Shu Hongying, Fan Dejun and Wei Junjie, Global stability of multi-group SEIR epidemic models with distributed delays and nonlinear transmission, Nonlinear Analysis: Real World Applications, 13 (2012) 1581–1592. Zuo Wenjie and Wei Junjie, Stability and bifurcation analysis in a diffusiveBrusselator system with delayed feedback, International Journal of Bifurcation and Chaos, 22(2012) 2 : 文献号: 1250037 . Zuo Wenjie and Wei Junjie, Multiple bifurcations and spatiotemporal patterns for a coupled two-cell Brusselator model, Dynamics of PDE, l8（2011）4： 363-384. Liu Jianxin and Wei Junjie, Bifurcation analysis of a diffusive model of pioneer and climax species interaction, Advances in Difference Equations, 2011 :52 doi:10.1186/1687-1847-2011-5. Zhu Gang and Wei Junjie, Stability and Hopf-bifurcation analysis of an unidirectionally coupled system, Electronic Journal of Qualitative Theory of Differential Equations, 2011, No. 85, 1-17. Chen Shanshan, Shi Junping and Wei Junjie, A Note on Hopf bifurcations in a delayed diffusive Lotka-Volterra predator-prey system, Computers and Mathematics with Applications, 62（2011） 5：2240-2245. Wang Jinfeng, Shi Junping and Wei Junjie, Dynamics and Pattern Formation in a Diffusive Predator-Prey System with StrongAllee Effect in Prey, Journal of Differential Equations, 251（2011）4-5： 1276-1304. Wei Junjie and Yu Chun Bo, Stability and bifurcation analysis in the cross-coupled laser model with delay, Nonlinear Dyn., 66 (2011)1:29-38. Qu Ying, Michael Y Li and Wei Junjie, Bifurcation analysis in a neutral differential equation, J.Mathematical Analysis and Applications, 378 (2011) 387–402. Zuo Wenjie and Wei Junjie, Stability and Hopf bifurcation in a diffusive predator–prey system withdelay effect, Nonlinear Analysis: Real World Applications, 12 (2011) 4: 1998-2011. Su Ying, Ruan Shigui and Wei Junjie, Periodicity and synchronization in blood-stageMalaria infection, . Mathematical Biology, 63(2011)3:557-574. Niu Ben and Wei Junjie, BifurcationA nalysiso f a NFDEA risingf rom Multiple-dela-Feedback Control, International Journal of Bifurcation and Chaos, 21 (2011) 3: 759-774. Fang Jian, Wei Junjie and Zhao Xiaoqiang, Uniqueness of traveling waves for nonlocal lattice equations, Proc. Amer. Math. Soc., 139(2011), 1361-1373. Wang Jinfeng, Shi Junping and Wei Junjie, Predator-prey system with strong Allee effect in prey, J. Mathematical Biology, 62(2011) 291–331. Shu Hongying and Wei Junjie, Bifurcation analysis in a discrete BAM network model with delays, Journal of Difference Equations and Applications, 17(2011)1: 69-84. Xu Meihong, Wei Yuan and Wei Junjie, Bifurcation analysis of R¨ossler system with multiple delayed feedback, ELECTRONIC JOURNAL OF QUALITATIVE THEORY OF DIFFERENTIAL EQUATIONS, 63（2010） 1-22. Qu Ying, Wei Junjie and Ruan Shigui, Stability and bifurcation analysis in hematopoietic stem cell dynamics with multiple delays, Physica D, 239 (2010) 2011-2024. Fan Dejun, Hong Ling and Wei Junjie, Hopf bifurcation analysis in synaptically coupled HR neurons with two time delays, Nonlinear Dynamics, 62(2010) 305–319. Fang Jian, Wei Junjie and Zhao Xiaoqiang, Spreading speeds and travelling waves for non-monotone time-delayed lattice equations, Proc. Royal Society A-Mathematical Physical and Engineering Sciences, 466(2010) 2119: 1919-1934. Qu Ying and Wei Junjie, Bifurcation analysis in a predator–prey system with stage-structure and harvesting, Journal of the Franklin Institute, 347 (2010) 1097–1113. Qu Ying and Wei Junjie, Global Hopf Bifurcation Analysis for aTime-delayed Model of Asset Prices, Discrete Dynamics in Nature and Society, 2010, art. no. 432821. Yi Fengqi, Liu Jianxin and Wei Junjie, Spatiotemporal pattern formation and multiple bifurcations in a diffusive bimolecular model, Nonlinear Analysis: Real World Applications, 11 (2010) 3770-3781. Liu Jianxin, Yi Fengqi and Wei Junjie, Multiple Bifurcation Analysis and Spatiotemporal Patterns in a 1-D Gierer-Meinhardt Model of Morphogenesis, International Journal of Bifurcation and Chaos, 20（2010）4：1007-1025. Yu Chunbo, Wei Junjie and Zou Xingfu, Bifurcation analysis in an age-structured model of a single species living in two identical patches, Applied Mathematical Modelling, 34(2010) 4:1068-1077. Su Ying, Wan Aying and Wei Junjie, Bifurcation analysis in a diffusive "food-limited" model with time delay, Applicable Analysis, 89（2010）7, 1161-- 1181. Wang Chuncheng and Wei Junjie, Hopf Bifurcation for Neutral Functional Differential Equations, Nonlinear Analysis Series B: Real World Applications, 11(2010)3:1269-1277. Wan Aying and Wei Junjie, Hopf bifurcation analysis of a food-limited population model with delay, Nonlinear Analysis Series B: Real World Applications, 11(2010)2:1087-1095. Su Ying, Wei Junjie and Shi Junping, Bifurcation analysis in a delayed diffusive Nicholson@#%s blowflies equation, Nonlinear Analysis Series B: Real World Applications, 11(2010)3:1692-1703 He Xuezhong, Li Kai and Wei Junjie, Market stability switches in a continuous-time financial market with heterogeneous beliefs, Economic Modelling, 26（2009）:1432-1442. Fan Dejun and Wei Junjie, Equivariant Hopf bifurcation in a ring of identical cells with delay, Mathematical Problems in Engieeing, vol. 2009, Article ID 950251, 34 pages, 2009. doi:10.1155/2009/950251. Su Ying, Wei Junjie and Shi Junping, Hopf Bifurcations in a Reaction-DiffusionPopulation Model with Delay Effect, Journal of Differential Equations, 247(2009) 4: 1156-1184. Li Kai and Wei Junjie, Stability and Hopf bifurcation analysis of a prey-predator system with two delays, Chaos, Solitons & Fractals, 42 (2009) 2606–2613. Cui Xiaoqian and Wei Junjie, Bifurcation analysis in a kind of fourth-order delay differential equation, Discrete Dynamics in Nature and Society, Volume 2009 (2009), ID 235038, 20 pagesdoi:10.1155/2009/235038. Fan Dejun and Wei Junjie, Bifurcation analysis of discrete survival red blood cells model, Communications in Nonlinear Science and Numerical Simulation, 14(2009)8: 3358-3368. Yi Fengqi, Wei Junjie and Shi Junping, Bifurcation and Spatiotemporal Patterns in a Homogeneous Diffusive Predator-Prey System, Journal of Differential Equations, 246 (2009) 1944-1977. Wei Junjie and Yu Chunbo, Hopf bifurcation analysis in a model of oscillatory gene expression with delay, Proceedings of the Royal Society of Edinburgh A, 139A（2009）879–895. Wijeratne A. W., Su Ying and Wei Junjie, Hopf bifurcation analysis of diffusive Bass with delay under “negative-word-of-mouth”, International Journal of Bifurcation and Chaos, 19(2009)3:1059-1067. Wan Aying and Wei Junjie, Bifurcation analysis of Mackey-Glass electronic circuits model with delayed feedback, Nonlinear Dynamics, 57(2009)1-2: 85-96. Yu Chunbo and Wei Junjie, Stability and bifurcation analysis in a basic model of the immune response with delays, Chaos, Solitons & Fractals, 41 (2009) 1223–1234. Yi Fengqi, Wei Junjie and Shi Junping, Global Asymptotical Behavior of the Lengyel-Epstein Reaction-Diffusion System, Appl. Math. Letters, 22 (2009)52–55. Wijeratne A. W., Yi Fengqi and Wei Junjie, Bifurcation Analysis in the Diffusive Lotka-Volterra System: An Application to Market Economy, Chaos, Solitons & Fractals, 40 (2009) 902–911. Zhao Jiantao and Wei Junjie, Stability and bifurcation in a two harmful phyoplankton-zooplankton system, Chaos, Solitons & Fractals, 39(2009)3:1395-1409. Fang Jian, Wei Junjie and Zhao Xiaoqiang, Spatial Dynamics of A Nonlocal and Time-delayed Reaction-Diffusion System, Journal of Differential Equations, 245(2008) 2749-2770. Wei Junjie and Zhang Chunrui, Bifurcation analysis in a class of neural networks with delays, Nonlinear Analysis Series B : Real World Applications,9(2008)5:2234-2252. Wang Chuncheng and Wei Junjie, Normal forms for NFDEs with parameters and application to the lossless transmission line, Nonlinear. Dynamics, 52（2008）199-206. Song Yongli, Peng Yahong and Wei Junjie, Bifurcations for a predator-prey system with two delays, Journal of Mathematical Analysis and Applications, 337( 2008)1: 466-479. Jiang Weihua , Wang Hongbin and Wei Junjie, A study of singularities for magnetic bearing systems with time delays, Chaos, Solitons & Fractals, 36(2008) 715-719. Jiang Weihua and Wei Junjie, Bifurcation analysis in Van der Pol’s oscillator with delayed feedback, J. Comp. Appl. Math. 213（2008）2-1: 604-615. Yi Fengqi, Wei Junjie and Shi Junping, Diffusion-Driven Instability and Bifurcation in the Lengyel-Epstein System,Nonlinear Analysis Series B: Real World Applications, 9( 2008)3: 1038-1051. Niu Ben and Wei Junjie, Stability and bifurcation analysis in an amplitude equation withdelayed feedback, Chaos, Solitons & Fractals, 37(2008)1362-1371. Jiang Zhichao and Wei Junjie, Stability and Bifurcation Analysis in a Delayed SIR Model, Chaos, Solitons & Fractals, 35(2008) 609-619. Fan Dejun and Wei Junjie, Hopf bifurcation analysis in a tri-neuron network with time delay,Nonlinear Analysis Series B: Real World Applications, 9(2008)9-25. Wan Aying and Wei Junjie, Bifurcation analysis in an approachable haematopoietic stem cells model, Journal of Mathematical Analysis and Applications, 245（2008）276-285. Wang Chuncheng and Wei Junjie, Bifurcation Analysis on a Discrete Model of Nicholson@#%s Blowflies, Journal of Difference Equations and Applications, 14(2008)7:737-746. Wei Junjie, Bifurcation analysis in a scalar delay differential equation, Nonlinearity, 20(2007) 11:2483-2498. Song Yongli, Wei Junjie and Yuan Yuan, Stability and switches and Hopf bifurcations in a pair of delay-coupled oscillator, J. NONL. Sciences, 17(2007)145-166. Qu Ying and Wei Junjie, Bifurcation analysis in a time-delay model for prey-predator growth with stage-structure, Nonlinear Dynamics, 49(2007)285-294 Yuan Yuan and Wei Junjie, Singularity Analysis on a Planar System with Multiple Delays, J. Dynam. Diff. Equns, 19(2007)2:437-456. Wei Junjie and Fan Dejun, Hopf bifurcation analysis in a Mackey-Glass system, International .J. Bifurcation and Chaos, 17(2007)6:2149-2157. Yuan Yuan and Wei Junjie, Multiple bifurcation analysis in a neural network model with delays, International .J. Bifurcation and Chaos, 16 (2006) 10:2903-2913. Wei Junjie and Zou Xingfu, Bifurcation analysis of a population model and the resulting SIS epidemic model with delays, J. Comp. Appl. Math. 197（2006）1: 169-187. Song Yongli, Wei Junjie and Yuan Yuan, Bifurcation analysis on a survival red blood cells model, J. Math. Anal. Appl. 316(2006)459-471. Wei Junjie and Jiang Weihua, Stability and Bifurcation Analysis in a Neural Network Model with Delays， DYNA. CONTI. DIS. IMPUL. SYST. A: Mathematical Analysis，13 (2006) 2:177-192. Li Xiuling and Wei Junjie, Stability and bifurcation analysis on a delayed neural network model, International .J. Bifurcation and Chaos, 15(2005)9:2883-2893. Song Yongli, Han Maoan and Wei Junjie, Stability and Hopf bifurcation analysis on a simplified BAM neural network with delays, Physica D-Nonlinear Phenomena, 200(2005)185-204. Wei Junjie and Jiang Weihua, Stability and bifurcation analysis in Van der Pol@#%s oscillator with delayed feedback, Journal of Sound and Vibration, 283(2005) 801-819. Song Yongli and Wei Junjie, Local Hopf bifurcation and global periodic solutions in a delayed predator–prey system, Journal of Mathematical Analysis and Applications, 301(2005) 1:1-21. Jiang Weihua and Wei Junjie, Bifurcation analysis in a limit cycle oscillator with delayed feedback, Chaos, Solitons & Fractals, 23(2005) 3:817-831. Wei Junjie and Michael Y Li, Hopf bifurcation analysis in a delayed Nicholson blowflies equation, Nonlinear Analysis TMA, 60(2005) 7:1351-1367. Wei Junjie, Zhang Chunrui and Li Xiuling, Bifurcation in a two-dimensional neural network model with delay, Appl. Math. Mech-English Edition, 26(2005)2:210-217. Li Xiuling and Wei Junjie , On the zeros of a fourth degree exponential polynomial with applications to a neural network model with delays, Chaos, Solitons & Fractals, 26(2005)2:519-526. Wei Junjie and Yuan Yuan, Synchronized Hopf bifurcation analysis in a neural network model with delays, J. Mathematical Analysis and Applications, 312(2005) 1:205-229. Shen Qihong and Wei Junjie, Stability and bifurcation of a human respiratory system model with time delay , Appl. Math. Mech-English Edition, 25 (2004)11: 1277-1290. Song Yongli, and Wei Junjie, Bifurcation analysis for Chen@#%s system with delayed feedback and its application to control of chaos, Chaos Solitons & Fractals, 22 (2004)1: 75-91 . Song Yongli, Wei Junjie and Han Maoan, Local and global Hopf bifurcation in a delayed hematopoiesis model, International J. Bifuecation and Chaos, 14(2004)11: 3909-3919. Meng Xianzhang and Wei Junjie, Stability and bifurcation of mutual system with time delay, Chaos, Solitons & Fractals, 21（2004）3：729-740. Zhang Chunrui and Wei Junjie, Stability and bifurcation analysis in a kind of business cycle model with delay, Chaos, Solitons & Fractals, 22(2004)4:883-896. Wei Junjie and Zhang Chunrui, Stability analysis in a first-order complex differential equations with delay, Nonlinear Analysis TMA, 59(2004)5:657-671. Wei Junjie and G. Velarde, Bifurcation analysis and existence of periodic solutions in a simple neyral network with delays, Chaos, 14(2004)3:940-953. Wei Junjie and Michael Y Li, Global existence of periodic solutions in a tri-neuron network model with delays, Physica D, 198(2004) 106-119. Zhang Ruyuan, Wei Junjie and Huang Qichang, Hopf bifurcations of Bi-parameter ordinary differential systems, International J. Bifurcation and Chaos, 13(2003)6: 1545-1560. Ruan Shigui and Wei Junjie, On the zeros of transcendental functions with applications to stability of delay differential equations with two delays, DYNA.CONT.DISC. IMPUL.SYST.A-MATH.ANAL. 10 (2003)6: 863-874 . Ruan Shigui , Wei Junjie and Wu Jianhong, Bifurcation from a homoclinic orbit in partial functional differential equations, DISC. CONT. DYNA. SYST. 9 (2003)5: 1293-1322 . 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. 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. 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(2002)4:407-417. Jiang Daqing and Wei Junjie, Monotone method for periodic boundary value problem and periodic solution of FDEs, Nonlinear Analysis,50(2002)885-898. 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。 Jiang Daqing and Wei Junjie, Existence of positive periodic solutions for Volterra intergo-differential equations，ACTA MATHEMATICA SCIENTIA，21（2011）4: 553-560. Ruan Shigui and Wei Junjie, On the zeros of a third degree exponential poly-nomial with applications to a delayed model for the control of testosteronesecretion, IMA. J.Math. Appl. Med. Bio,18(2001)41-52. 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. Campbell SA, Ruan Shigui and Wei Junjie, Qualitative analysis of a neural network model with multiple time delays, INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, 9(1999) 8: 1585-1595. Li Xiangao, Ruan Shigui and Wei Junjie, Stability and bifurcation in delay-differential equations with two delays, JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, 236(1999) 2: 254-280. 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. Ruan Shigui and Wei Junjie, Periodic solutions of planar systems with two delays, Pro. Roy. Soci. Ediburgh ,129A(1999) 1017-1032. Wei Junjie and Ruan Shigui, Stability and bifurcation in a neural network model with two delays, Physica D ,130(1999)255-272.