查询词典 difference boundary value problem

Differing from the general BEM that is attributed from the general boundary integral equation, The natural boundary element method attributed from the natural BIE has not only the advantage of the dimensionality, but is confirmed and gain the only NBIE from the original problem.

无网格方法仅仅需要节点信息，克服了有限元等传统数值方法对网格有较强依赖性的缺点，摆脱了网格的束缚，避免了大量的网格分划、复杂的网格生成及重新划分的工作，减少了因网格畸变而引起的困难，而且收敛快、精度高、易于实现和进行后处理工作。

There is a relatively complete style of homogeneous function about the boundary condition in the problem of sure resolution of unhomogeneous boundary condition,which is based on the summarizing of mass former experiences and is proved in this article.

通过对非齐次边界条件的定解问题的讨论，引出了本文的论题，对非齐次边界条件定解问题的边界条件齐次化函数提出了一种比较一般和标准的形式，并提出了一个定理。对该定理进行了证明，证明了它的正确性。

This process is modelled as a free boundary problem for a nonlinear system of hyperbolic differential equations, where the free boundary is the surface of the tumor.

上述过程可用一个双曲偏微分方程系统的自由边界问题来刻画，其中自由边界是肿瘤的表面。

The direct problem was solved by DRBEM, which eliminated the drawback of domain integral for classical boundary element method and resulted in pure boundary integral calculation.

正问题采用双倒易边界元法求解，该法避免了传统边界元法需进行区域积分的缺点，仅需纯边界积分计算。

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。

Zhu Jialin[23]used a simple layer distribution expression based on velocity-pressure formula for the Dirichlet problem of Stokes equation with a Galerkin boundary element method and presented some numerical examples calculated by constant boundary element.

祝家麟从速度-压力公式出发，利用单层位势表示定常Stokes 方程Dirichlet 问题的解，用Galerkin 边界元法求解，并用常单元给出数值算例。

The solution expression is suitable both for the inner and outer problem with a close boundary, and the calculation of velocity and pressure can be carried out separately, which is an advantage of boundary element scheme.

该方法的积分表达式可同时表示内、外边值问题的解，而且计算速度和计算压力的式子可以分别开，这是用边界积分公式求解的优点。

The modern philologist wants for many times to the idiom to make to mark out boundary, meeting with often again so hard nut to crack; Also therefore make sure the scope of the idiom, make a clear distinction it and other familiar languages, especially with consistently use the boundary of the language, became idiom a define of core problem.

现代语言学者多次想对成语作个划界，又不时碰上这样那样的难题；也因此，确定成语的范围，划清它与其他熟语，特别是与惯用语之间的界限，就成了成语界定的核心问题。

The full field boundary element solutions are solved for the small—scall yielding problem of boundary layer formulation.

针对双材料界面裂纹边界层构形计算了小范围屈服问题的全场解，并与现有理论和有限元结果进行了比较。

The model is a free boundary problem for a system of partial differential equations governing the intratumoral nutrient concentration and the intratumoral pressure. The free boundary is the surface of the tumor.

该模型是一个关于肿瘤内部压力和肿瘤内部营养浓度的偏微分方程系统自由边界问题，其中自由边界是肿瘤外表面。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。