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Identifying weak focus and center in a convection model 期刊论文
APPLIED MATHEMATICS LETTERS, 2020, 卷号: 100, 页码: 7
作者:  Guo, Laigang;  Yu, Pei;  Chen, Yufu
收藏  |  浏览/下载：167/0  |  提交时间：2020/05/24
Convection model  3-dimensional quadratic system  Normal form  Limit cycle  
Bifurcation analysis on a class of three-dimensional quadratic systems with twelve limit cycles 期刊论文
APPLIED MATHEMATICS AND COMPUTATION, 2019, 卷号: 363, 页码: 12
作者:  Guo, Laigang;  Yu, Pei;  Chen, Yufu
收藏  |  浏览/下载：214/0  |  提交时间：2020/01/10
3-dimensional quadratic system  Symmetrical vector field  Normal form  Limit cycle  Isochronous center  
LOCAL MULTILEVEL METHODS FOR SECOND-ORDER ELLIPTIC PROBLEMS WITH HIGHLY DISCONTINUOUS COEFFICIENTS 期刊论文
JOURNAL OF COMPUTATIONAL MATHEMATICS, 2012, 卷号: 30, 期号: 3, 页码: 223-248
作者:  Chen Huangxin;  Xu Xuejun;  Zheng Weiying
收藏  |  浏览/下载：160/0  |  提交时间：2021/01/14
BOUNDARY-VALUE-PROBLEMS  WEIGHTED L2 PROJECTION  FINITE-ELEMENT METHODS  MULTIGRID V-CYCLE  DOMAIN DECOMPOSITION  3 DIMENSIONS  ITERATIVE METHODS  ERROR ESTIMATORS  SCHWARZ METHODS  REFINED MESHES  Local multilevel method  Adaptive finite element method  Preconditioned conjugate gradient method  Discontinuous coefficients  
Lotka-Volterra System with Volterra Multiplier 期刊论文
SOFTWARE TOOLS AND ALGORITHMS FOR BIOLOGICAL SYSTEMS, 2011, 卷号: 696, 页码: 647-655
作者:  Guerlebeck, Klaus;  Ji, Xihhua
收藏  |  浏览/下载：110/0  |  提交时间：2018/07/30
Volterra Multiplier  Ecological Equations  Lotka-Volterra Tree Systems  3D Predator-Prey Cycle System  
On structure of graphs embedded on surfaces of nonnegative characteristic with application to choosability 期刊论文
DISCRETE MATHEMATICS, 2002, 卷号: 248, 期号: 1-3, 页码: 283-291
作者:  Xu, BG
收藏  |  浏览/下载：117/0  |  提交时间：2018/07/30
embedded graph  3-cycle  choosability