variation derivative是什么意思

用法例句

The generalized variational principle for solving 3-dimensional eddy current problems;

求解三维涡流问题的广义变分原理

A conclusion of optimal trajectory variation;

一个最优轨线变分的结论

A variational method with differential forms gives better precision for numerical solution of transport critical problem based on spherical geometry, and its computation seems simple than other approximate methods.

对于球几何问题 ,讨论了一种基于微分方程的变分形式求解方法 ,数值计算显示达到了较满意的精度 ,而且计算过程比起其他近似方法要简单

A general model of two phase image segmentation based on variational level set method is proposed,and the region model is based on the image general probability distribution function.

基于变分水平集方法建立了两相图像分割的通用模型,其区域模型基于图像的一般概率分布函数,通过变分方法得到水平集函数的演化方程和符合常值分布、Gauss分布及Rayleigh分布的参数估计。

Dissipative and coherent effects of X-point solitons are investigated on the basis of dynamic variational formulation in two_dimensional photonic bandgap (PBG) structure of square lattice.

采用变分方法对于二维矩形光子带隙结构中X点孤子的耗散以及相干作用进行了动力学分析。

Application of the variation principle for calculating the force-energy parameters of rail rolling by a universal mill;

应用刚塑性体的变分原理求解钢轨万能轧制过程的力能参数

The calculation of critical load of a compressive bar by direct method based on variation principle;

基于变分原理的直接解法求压杆的临界载荷

Relativistic variation principle and dynamical equations of the rotational variable mass system;

转动变质量系统的相对论性变分原理和动力学方程

Based on energy-variational principle,a fast numerical calculational methods is proposed to study the accurate and fast model of on-ling control on plate or strip mill.

为解决板带轧制高速高精度在线模型问题,文章基于能量变分原理,研究了一种快速数值算法。

Analysis on the strain distribution of carbon fiber in coherent length of member in bending;

受弯构件粘结长度内碳纤维应变分布的分析

The strain distribution of low-dimensional semiconductor materials;

低维半导体材料应变分布

The strain distribution and equilibrium morphology of Ge/Si semiconductor quantum dot;

Ge/Si半导体量子点的应变分布与平衡形态