In solving the mathematical model, two time-saving and effective numerical methods have been tested and compared with the finite difference method commonly used.
对动态数学校型的数值求解，试验了两种颇为有效的方法，并将这两种方法和常用的有限差分方法作了比较。
In this paper, several commonly used methods of numerical optimization are briefly reviewed.
本文就常用的几种数值优化方法作了简要的评述。
The usual prediction methods of welding deformation include experimental method, analytical method, numerical method and equivalent load method, and the latter two methods are more commonly used.
焊接变形分析方法包括实验法、解析法、数值分析法、等效载荷法等，常用的是后两种方法。
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