查询词典 variational method

A variational formulation level set model based on the image global information is obtained, which can detect contours both with and without gradient based on global information and eliminate the re-initialization procedure. The stopping term does not depend on the boundary gradient of the image, which overcomes greatly the "over segmentation".

针对这种情况，该文提出了一种基于图像全局信息并且不需要重新初始化的变分水平集红外图像分割方法，不考虑图像边缘梯度的影响，将图像全局信息作为外部能量项，在很大程度上克服了边缘模糊时过分割的情况。

In the thesis a novel formulation of variable-domain variational principle for fluidmechanics has been successfully deduced,and the Kelvin's theorem has beenextended to steady compressible ones.

本文还排导得到了一个新型的变域变分公式，并把Kelvin原理推广到定常可压无旋流体。

For the first patern, elastic dynamics is adopted to study the steady state rolling contact, elastic dynamics incorporating with rigid dynamics is adopted to study the non-steady state. For the steady state, the analytical solution is obtained, and for the non-steady state, the variational formulation to solve the problem numerically is derived For the later patern, the function type friction coefficient is introduced. On the basis of the quasi-stastic theories of constant friction coefficients, both the exact theory and the simplified theory of the function type friction coefficient are established, the computer programms for both the theories are also made out. Using the function type friction coefficient, Shen-Hedrick-Elkins theory's application range is extended to large creepage .

对于速度对接触体力学特性的影响，本文采用弹性动力学方法和弹性动力学与刚体动力学相结合的方法分别对稳态和非稳态两种情况进行了研究，得到了稳态情况的解析解，给出了对非稳态情况进行数值求解的变分公式；对于速度对相关物理量的影响，本文主要讨论了速度对摩擦系数的影响，在滚动接触准静态理论的基础上引进了函数型摩擦系数，建立了函数型摩擦系数的滚动接触准静态精确理论和简化理论，并分别编制了相关的计算程序，还用函数型摩擦系数将简便的Shen-Hedrick-Elkins理论的适用范围扩展到大蠕滑区。

In this paper, an united variational inequality model of instantaneous dynamic user optimal problem is proposed.

本文建立了瞬时动态用户最优配流问题的变分不等式模型。

We give a modified algorithm to solve a kind of variational inequality.

4我们给出一个改进的算法求解一类变分不等式。

Hence, it is necessary to study the well-posedness for variational inequality to judge the stability of the sequence of solution.

因此有必要研究变分不等式的适定性来判断序列解的稳定性。

As special cases,some existence results of solutions to implicit vector variational inequality are presented.

作为特殊情况，给出了隐式向量变分不等式解的存在性结论。

The neural networks of the linear variational inequality are studied.

给出了一个解线性变分不等式问题的神经网络。

At last,we conclude the essay and put forward to some new questions and ways by which may be solved(variational inequality and functional analysis).

在文章的最后，对本文进行了总结，并且提出了一些新的问题以及可能解决的方法(变分不等式结合泛函分析的方法)。

In this dissertation, two problems in the variational inequality theory are mainly considered: the existence of solutions and the approximation schemes.

本文主要讨论了变分不等式理论中的两个方面的问题：解的存在性问题以及解的逼近问题。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。