姓名： 徐衍聪 Yancong Xu
性别：男 Male
联系方式：杭州师范大学理学院；Yancongx@163.com
职称：副教授Associate Professor

研究领域：
1．动力系统，ODE & PDE
2．局部斑图动力学研究
3．同宿异宿现象
4．矩阵微分方程

Research Interests:
1．Dynamical Systems, ODE & PDE
2．Dynamics of Patterns, Nonlinear Waves
3．Homoclinic and Heteroclinic Phenomena
4．Matrix Differential Equations

个人简历
2010年9月-至今，杭州师范大学数学系，副教授，硕士生导师
2011年1月-2012年1月，Brown University，Division of Applied Mathematics, 国家留学基金资助访问学者，Bjorn Sandstede
2009年6月-2012年3月，浙江大学，数学博士后流动站，博士后，汪国昭教授
2008年7月-2010年8月，杭州师范大学数学系，讲师，硕士生导师
2005年8月-2008年月7月，华东师范大学，数学系，博士，朱德明教授

Employment:
1．Department of Mathematics, Hangzhou Normal University, Hangzhou From July 1st, 2010 to present. Associate Professor Master Mentor
2．Department of Mathematics, Hangzhou Normal University, Hangzhou From July 1st, 2008 to Aug. 30th, 2010. Lecture. Master Mentor(From 2009)
3．Division of Applied Mathematics, Brown University, Providence, USA From Jan. 18th, 2011 to Jan. 18th, 2012. Bjorn Sandstede,Visiting Scholar
4．Department of Mathematics, Zhejiang University, Hangzhou,China. Professor Wang Guozhao From June 12th, 2009 to March 15th, 2011. Postdoc.
5．Department of Mathematics, East China Normal University, Shanghai.From Aug. 30 2005 to Aug. 30th 2008. PH.D Candidate, Professor Zhu Deming

教学情况：
1．执教双语ODE课程
2．执教高等数学，动力系统分支理论等课程
3．执教AUTO & Matlab

Teaching:
1．Teach Bilingual ODE:
2．Dynamical Systems and Higher Mathematics etc.
3．Softwares: AUTO & Matlab

科研情况：
目前主要从事微分方程与动力系统研究，主要包括：同宿异宿分支研究、局部结构研究及数值模拟等研究工作，主要研究各种不同退化情形下的同宿异宿分支问题及特殊动力系统，包括反转动力系统，Hamiltonian系统及一般动力系统的各类分支问题，局部结构分支问题等。美国工业与应用数学学会（SIAM）会员，近年来在国内外重要期刊上发表论文20余篇，曾主持和参与各类国家或省基金，杭州师范大学培育项目、教改项目近10项科研项目。目前参与国家自然科学基金“几类微分系统定性理论中若干问题的研究”（11171085）一项，主持浙江省自然科学基金项目一项（将于2012年6月结题），曾获教育部公派留学基金全额资助（2011.1-2012.1），访问布朗大学（美国常青藤盟校之一）应用数学中心Bjorn Sandstede教授，主持中国博士后科学基金项目一项（2009.8 - 2011.3），参与2009年、2011年浙江省自然科学基金项目两项。曾参与和完成国家自然科学基金项目（10671105，2007.1- 2008.12），已结题；参与国家自然科学基金项目（10801051，2009.1-2011.12）一项，已结题。
部分论文（Journal Publications）：
[1] Bjorn Sandstede,Yancong Xu (Corresponding author), Snakes and isolas in non-reversible conservative systems. Dynamical Systems, 2012. (Accepted)
[2] Yancong Xu, D. M. Zhu, X. B. Liu, Bifurcations of Multiple Homoclinics in General Dynamical Systems. Discrete and Continuous Dynamical Systems (A), 30(3)(2011), 945-963.
[3] Yancong Xu, D. M. Zhu, Bifurcation of heterodimensional cycles with one orbit flip and one inclination flip. Nonlinear Dynamics, 60(2010),1-13.
[4] X. G. Zhang, Yancong Xu, Multiple positive solutions of singularly perturbed differential systems with different orders. Nonlinear Analysis, Theory, Methods & Applications, 72(5)(2010), 2645-2657.
[5] Yancong Xu, D. M. Zhu, F. J. Geng, Codimension 3 Heteroclinic Bifurcations with Orbit and Inclination Flips in Reversible Systems. Inter. J. of Bifur. and Chaos. 18(12) (2008), 3689-3701.
[6] Yancong Xu, D. M. Zhu, Guifeng Deng, Codimension 2 Reversible Heteroclinic Bifurcations with Inclination Flips. Science in China,Series, A:Mathematics, 52 (8)(2009),1801-1814.
[7] F. J. Geng, D. M. Zhu, Yancong Xu, Bifurcations of Heterodimensional Cycles with Two Saddle Points. Chaos, Solitons and Fractals, 39(5)(2009), 2063- 2075.
[8] Yancong Xu, New Kamenev Type Theorems for Super-linear Matrix Differential Equations. Applied Mathematics and Computation, 209(2)(2009), 410-414.
[9] F. J. Geng, Yancong Xu, D. M. Zhu, Periodic Boundary Value Problems for First-order Impulsive Dynamic Equations on Time Scales. Nonlinear Analysis, Theory, Methods & Applications. 11(69) (2008), 4074-4087.
[10] Fengjie Geng, Yancong Xu, Bifurcations of heteroclinic loop accompanied by pitchfork bifurcation. Nonlinear Dynamics. (Revised).
[11] 徐衍聪，朱德明，邓桂峰，带有倾斜翻转的余维2反转异宿分支，中国科学，A辑，39（7）（2009），827-839．

Activities& Links
Office Hours:
Monday: 12:00PM-1:00PM
Friday:10:00AM-11:00AM

Seminar:
ODE & PDE Seminar: Monday:5:00PM-6:30PM

Forthcoming Conferences & Talks:
1．International Conference on Applied Mathematics, Modeling, Analysis & Computation. From 28th May to June 1st, 2012, City of University of Hong Kong, Hong Kong.
2．The Sixth International Conference on Recent Advances in Applied Dynamical Systems. From June 24th to 27th, 2012, Guangzhou University, Guangzhou.

Links:
1．Department of Mathematics, Zhejiang University,China.
2．Division of Applied Mathematics, Brown Univesity, USA.
3．Department of Mathematics, Brown University, USA
4．Deapartment of Mathematics, East China Normal University,China.
5．Department of Mathematics, Imperial Colleage, London, UK
6．ICERM,Brown University,USA
People: Bjorn Sandstede; J. Nathan Kutz; Martina Chirilus-Bruckner; Alan R. Champneys;Yiping Ma; John Burke; J. Lamb

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