结合工程实例用非线性有限单元法对高边坡进行稳定分析，并提出判断边坡稳定的方法，以供参考。

Combining the actual project example, non-linear FEM is used for a stability analysis of high slope and a way of judging the slope stability is put forward for reference.

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针对如何快速求取空间点到STL模型表面有符号距离这一问题，提出一种基于线性八叉树的参考球方法。

For fast calculating the signed distance from spatial point to STL model, a reference ball method was put foward based on linear octree.

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由于求解非线性电阻网络的方法比较繁琐，对初学非线性电阻网络者而言，常常感到比较困难，本文给出，利用等效的方法求解非线性电阻网络的思路和途径，以及注意事项，意在为同仁提供参考。

This article gives the ways of thinking and path of solving the non-linear electric resistance net by means of equivalence and what should be paid attention to for reference only.

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