This paper discusses a method of selecting the boundary tree in edge finite element method, proposes the matrix rank method and introduces its applications.
介绍了棱边有限元法中选取边界树的原理和方法，提出了矩阵求秩法计算边界树，并结合实例说明其有效性．。
Their boundary went from Heleph and the large tree in Zaanannim, passing Adami Nekeb and Jabneel to Lakkum and ending at the Jordan.
他们的境界是从希利弗从撒拿音的橡树，从亚大米尼吉和雅比聂，直到拉共，通到约旦河。
On this basis, the content of manufacturability evaluation based on boundary checking is discussed and the layered evaluation tree of part configuration and machinability is proposed.
在此基础上，讨论了基于约束检验的可制造性评价内容和提出了结构工艺性评价和加工可行性评价的分层评价树；
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