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The Analytical Expressions for Computing the Minimum Distance between a Point and a Torus 被引量:1
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作者 Xiaowu Li Linke Hou +3 位作者 Juan Liang Zhinan Wu Lin Wang Chunguang Yue 《Journal of Computer and Communications》 2016年第4期125-133,共9页
In this paper, we present the analytical expressions for computing the minimum distance between a point and a torus, which is called the orthogonal projection point problem. If the test point is on the outside of the ... In this paper, we present the analytical expressions for computing the minimum distance between a point and a torus, which is called the orthogonal projection point problem. If the test point is on the outside of the torus and the test point is at the center axis of the torus, we present that the orthogonal projection point set is a circle perpendicular to the center axis of the torus;if not, the analytical expression for the orthogonal projection point problem is also given. Furthermore, if the test point is in the inside of the torus, we also give the corresponding analytical expression for orthogonal projection point for two cases. 展开更多
关键词 point projection Center Axis of the Torus Major Planar Circle Minor Planar Circle INTERSECTION
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Approximation of Nearest Common Fixed Point of Nonexpansive Mappings in Hilbert Spaces 被引量:5
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作者 Shi Sheng ZHANG H.W. JOSEPH LEE Chi Kin CHAN 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2007年第10期1889-1896,共8页
The purpose of this paper is to study the convergence problem of the iteration scheme xn+l = λn+1y + (1 - λn+1)Tn+1xn for a family of infinitely many nonexpansive mappings T1, T2,... in a Hilbert space. It is... The purpose of this paper is to study the convergence problem of the iteration scheme xn+l = λn+1y + (1 - λn+1)Tn+1xn for a family of infinitely many nonexpansive mappings T1, T2,... in a Hilbert space. It is proved that under suitable conditions this iteration scheme converges strongly to the nearest common fixed point of this family of nonexpansive mappings. The results presented in this paper extend and improve some recent results. 展开更多
关键词 common fixed point family of nonexpansive mappings nearest point projection iterative scheme
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Comparison of two projection methods for modeling incompressible flows in MPM
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作者 Shyamini Kularathna Kenichi Soga 《Journal of Hydrodynamics》 SCIE EI CSCD 2017年第3期405-412,共8页
Material point method(MPM)was originally introduced for large deformation problems in solid mechanics applications.Later,it has been successfully applied to solve a wide range of material behaviors.However,previous ... Material point method(MPM)was originally introduced for large deformation problems in solid mechanics applications.Later,it has been successfully applied to solve a wide range of material behaviors.However,previous research has indicated that MPM exhibits numerical instabilities when resolving incompressible flow problems.We study Chorin's projection method in MPM algorithm to simulate material incompressibility.Two projection-type schemes,non-incremental projection and incremental projection,are investigated for their accuracy and stability within MPM.Numerical examples show that the non-incremental projection scheme provides stable results in single phase MPM framework.Further,it avoids artificial pressure oscillations and small time steps that are present in the explicit MPM approach. 展开更多
关键词 Chorin's projection method material point method(MPM) incompressible flow time step
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