First order method 一阶方法
advanced mean value-first order method 改进的均值法
first order reliability method 用一次二阶矩法 ; 利用一次二阶矩法 ; 可靠度方法 ; 一阶可靠度方法
First-order Second-moment Method 一次二阶矩法
First-order design method 一级近似法
It is usually use first-order method such as effective lengths method in engineering practical stability compute. Because of much hypothesis adopted, so it can only make approximate analysis.
在工程实际的框架稳定计算中，一般采用计算长度法等一阶近似计算法，由于采用了较多的假设，因此只能进行近似线性计算。
This model can also show the effect of the parameters of the wedge. By the first-order method in the optimized design module of ANSYS, the optimized design program is worded out in the APDL language.
采用有限元分析软件ANSYS中自带的优化设计模块中的一阶优化方法编制了APDL语言优化设计程序。
When doing structural optimization calculations, first-order method is more commonly used, because of it is more sensitive to design variables and Converge faster. The results would be more accurate.
在结构优化设计计算中，一阶方法是较常用的方法，它对设计变量更加敏感，收敛速度快，计算结果更精确。
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