边界元法

Then, for the first time, a finite element model of the cylindrical shell surface was bring forward and set up.

首次提出和建立了柱体坐标系下的曲面柱壳单元有限元模型，以及在柱坐标系下的边界元法基本方程和柱坐标系下无限域与半无限域基本解。

In the second chapter, the basic micro-dimensional statically determinate mechanism, and Boundary Element Method and its special resource program are introduced. In the third chapter, kinds of roller bearing longevity prolonging methods and elastic roll bend equivalent statically determinate roll system are discussed.

第二章阐述轧机微尺度理论的基础－微尺度静定机构学和边界元法及其专用程序，第三章论述二辊及四辊轧机轧辊弹性弯曲辊颈的倾斜的微尺度行为等效静定辊系和各类滚动轴承延寿机理。

The current response of a generator/collector system based on a double-barrel micropipet was simulated by boundary element method , from which the collection efficiency for different pipets with different geometry was calculated.

初步探讨了双通道微米管作为产生/收集装置所涉及的理论及其传质过程，应用边界元法数值拟合了收集效率与管形之间的关系，通过加速离子转移实验对拟合结果进行了验证。

Some closedforms of formulae are also obtained for the evaluation of the Cauchy prin-cipal integrals over quadratic boundary elements and linear internal cells of2-D problems.

通过采用以上各种技术成功地解决了三维弹塑性有限形变问题边界元法中最关键的数值积分的精度和效率问题。

In this paper we discuss the natural boundary element method for harmonic equation in an exterior elliptic domain.

引言 二十年来，自然边界元法已在椭圆问题求解方面取得了许多研究成果。

We investigate the natural boundary element method for the boundary value problem of Helmholtz equation in an exterior elliptic domain.

本文研究椭圆外区域上Helmholtz方程边值问题的自然边界元法。

In this paper,we investigate the natural boundary element method for the boundary value problem of Helmholtz equation in an exterior elliptic domain.

本文研究椭圆外区域上Helmholtz方程边值问题的自然边界元法。

Different kinds of integrations have to be evaluated in boundary element methods. The nearly singular integral is the most difficult one of them. A self-adaptive Gauss integral method is proposed to divide the element into finer meshes under the specified conditions.

边界元法通常需要采用数值方法解决单元内的各种积分问题，而准奇异积分是各种积分中数值处理最为困难的部分。

To provide theory foundation for inverted deduction work, numerical simulation for propagating in highway-surface with exceptional block and inanition and crack has been performed. The numerical simulation results show that the BEM is an effective method for the elastic-waves propagating in highway-surface concrete medium.

利用边界元法能够很好的描述弹性波在砼介质中传播的特性，正演模拟异常石块、脱空和裂缝对波的传播的影响，为进一步的反演工作提供理论依据。

Firstly, by using the vector integral theory and boundary conditions of the electromagnetic filed, the boundary problem of two electromagnetic fields in the upper half space and lower half space is transformed into two vector integral equations just related to the topography interface, i.e.

提出了一种用边界元法计算频率域人工源三维地形电磁场的数值模拟方法。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。