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覆盖平面点集的最窄圆环
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作者 傅清祥 YapC-K 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2000年第1期57-62,共6页
给出判断一个覆盖平面有限点集的圆环达到最窄的一组充分条件,同时指出,对于一般的平面有限点集而言,其中的一个条件是不可放弃的.这个结果对于解决所谓圆度问题不仅有理论价值,而且有实际意义.
关键词 计算几何 圆度 局部极小值点 最小值点
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Soliton dynamics in planar ferromagnets and anti-ferromagnets
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作者 LINFang-hua SHATAHJalal 《Journal of Zhejiang University Science》 CSCD 2003年第5期503-510,共8页
The aim of this paper is to present a rigorous mathematical proof of the dynamical laws for the topological solitons( magnetic vortices) in ferromagnets and anti-ferromagnets. It is achieved through the conservation l... The aim of this paper is to present a rigorous mathematical proof of the dynamical laws for the topological solitons( magnetic vortices) in ferromagnets and anti-ferromagnets. It is achieved through the conservation laws for the topological vorticity and the weak convergence methods. 展开更多
关键词 Magnetic vortices Topological vorticity Conservation law Soliton dynamics
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计算任意维几何体的近似中心
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作者 傅清祥 CheeK.Yap 《数值计算与计算机应用》 CSCD 北大核心 1999年第4期266-273,共8页
In this paper, an algorithm for computing near-centers of a nearly round body inany dimension is shown. The algorithm generalizes a recent result [2]. It is quite simpleand needs only d "parallel" probe step... In this paper, an algorithm for computing near-centers of a nearly round body inany dimension is shown. The algorithm generalizes a recent result [2]. It is quite simpleand needs only d "parallel" probe steps including d(d + 1) probes in d-dimension. 展开更多
关键词 几何体 中心 计算 计量学
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ZERO SET OF SOBOLEV FUNCTIONS WITH NEGATIVE POWER OF INTEGRABILITY
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作者 JIANGHUIQIANG LINFANGHUA 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2004年第1期65-72,共8页
Here the authors are interested in the zero set of Sobolev functions and functions of bounded variation with negative power of integrability. The main result is a general Hausdorff dimension estimate on the size of ze... Here the authors are interested in the zero set of Sobolev functions and functions of bounded variation with negative power of integrability. The main result is a general Hausdorff dimension estimate on the size of zero set. The research is motivated by the model on van der waal force driven thin film, which is a singular elliptic equation. After obtaining some basic regularity result, the authors get an estimate on the size of singular set; such set corresponds to the thin film rupture set in the thin film model. 展开更多
关键词 Singular elliptic equation Poincare inequality Thin film Partial regu- larity Zero set Rupture set Hausdorff dimension
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