姓名： 徐衍聰 Yancong Xu
性別：男 Male
聯系方式：杭州師范大學理學院；Yancongx@163.com
職稱：副教授Associate Professor

研究領域：
1．動力系統(tǒng)，ODE & PDE
2．局部斑圖動力學研究
3．同宿異宿現象
4．矩陣微分方程

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

個人簡歷
2010年9月-至今，杭州師范大學數學系，副教授，碩士生導師
2011年1月-2012年1月，Brown University，Division of Applied Mathematics, 國家留學基金資助訪問學者，Bjorn Sandstede
2009年6月-2012年3月，浙江大學，數學博士后流動站，博士后，汪國昭教授
2008年7月-2010年8月，杭州師范大學數學系，講師，碩士生導師
2005年8月-2008年月7月，華東師范大學，數學系，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

教學情況：
1．執(zhí)教雙語ODE課程
2．執(zhí)教高等數學，動力系統(tǒng)分支理論等課程
3．執(zhí)教AUTO & Matlab

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

科研情況：
目前主要從事微分方程與動力系統(tǒng)研究，主要包括：同宿異宿分支研究、局部結構研究及數值模擬等研究工作，主要研究各種不同退化情形下的同宿異宿分支問題及特殊動力系統(tǒng)，包括反轉動力系統(tǒng)，Hamiltonian系統(tǒng)及一般動力系統(tǒng)的各類分支問題，局部結構分支問題等。美國工業(yè)與應用數學學會（SIAM）會員，近年來在國內外重要期刊上發(fā)表論文20余篇，曾主持和參與各類國家或省基金，杭州師范大學培育項目、教改項目近10項科研項目。目前參與國家自然科學基金“幾類微分系統(tǒng)定性理論中若干問題的研究”（11171085）一項，主持浙江省自然科學基金項目一項（將于2012年6月結題），曾獲教育部公派留學基金全額資助（2011.1-2012.1），訪問布朗大學（美國常青藤盟校之一）應用數學中心Bjorn Sandstede教授，主持中國博士后科學基金項目一項（2009.8 - 2011.3），參與2009年、2011年浙江省自然科學基金項目兩項。曾參與和完成國家自然科學基金項目（10671105，2007.1- 2008.12），已結題；參與國家自然科學基金項目（10801051，2009.1-2011.12）一項，已結題。
部分論文（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] 徐衍聰，朱德明，鄧桂峰，帶有傾斜翻轉的余維2反轉異宿分支，中國科學，A輯，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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