摘要 关键词:无网格伽辽金方法；大变形；无单元网格法；移动最小2乘近似。 Abstract Meshless method is base on approximation of points, it can remove the……

摘要 关键字:积和式；行列式； 0-1矩阵 Abstract The theory of combination-matrix is a mathematic branch which emerges recent years . It proves the com……

摘要 关键字: 部署；网络；数据库；文件 abstract The most important function of the Instant messaging system is immediate exchange of information, As ……