查询词典 natural boundary

In this paper, Galerkin method is employed. First, test functions to satisfy natural boundary conditions are selected. Then the approximate analytic formulations of the system frequency are derived. Meanwhile the approximate analytic formulation of the limit velocity is got.

采用直接法，首先选取满足自然边界条件的试函数，而后求出了系统固有频率的近似解析公式，同时也得到了极限流速的近似解析公式。

We deal with the biharmonic equation and proved that under our assumptions, the week solution of the natural boundary value problem strongly converges (in H~2) to that of the first boundary value problem.

为克服这一困难，我们用具自然边界条件的边值问题(在二阶椭圆型方程情形为第三边值问题)去逼近相应的第一边值问题，并以重调和方程为例，证明了在一定条件下，其具自然边界条件的边值问题的弱解在H~2的意义下强收敛到相应的第一边值问题的弱解。

In theprocedure of natural boundary reduction,the Green function of the original equa-tion with the Dirichlet boundary condition is used,but the Green function could notbe obtained for a general domain.

在自然边界归化的过程中要用到原始微分方程Dirichlet问题的Green函数，但是对于一般区域Green函数是不容易得到的。

The differential equations of equilibrium and natural boundary conditions are given.

在曲梁精确的翘曲位移基础上，根据变分原理，提出了对任意开口薄壁截面圆弧曲梁通用的线性理论，给出平衡微分方程和相应的边界条件。

Anisotropic problem;elliptic artificial boundary;exterior problem;natural boundary reduction;DDM.

各向异性问题；椭圆人工边界；外问题；自然边界归化；区域分解

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。

In sphere approximate, GPS/Gravity-BVP is Neumann problem over exterior spherical domains. Then the natural boundary reduction, suggested by Feng and Yu, is applied to deal with the three dimensional problems. By expansion in spherical harmonics, the natural integral equations of harmonic problems over exterior spherical domains are obtained. Meanwhile, a numerical method for solving geodetic BVP is developed.

在球近似下将GPS-边值问题转化为Neumann外问题，用自然边界元法进行自然边界归化，得到自然边界积分方程，再求自然边界积分方程的数值解，与其他边界元方法相比，自然边界元法的计算量大大减小，并且具有很好的逼近性质，能有效地处理奇异积分，是求解GPS-边值问题有效方法。

Other various scenery are also many by the topic volume, the antithetical couplet, the prefatory remarks and so on each kind of form cast the Confucianist thought to among; But the nearly 30 scenic spots have directly manifested Taoism"s natural boundary or the deity boundary pursue; Chinese tradition esthetics manifested and the imperial authority unification and the formula development in Old Summer Palace; Old Summer Palace makes the scenery mostly is the famous poem celebrated work description ideal condition and the famous painter"s landscape painting reappearance; In Old Summer Palace enables the north and south culture to south botanical garden imitation and the anomalous form design to achieve the fusion and so on manifests the Old Summer Palace landscape all the profound cultural connotation, unfolds the Old Summer Palace landscape is the Qing Dynasty culture carrier characteristic.

其他各景也多以题额、对联、题记等各种形式熔铸儒家思想于其中；而近30处景点直接体现了道家的自然境界或神仙境界的追求；中国传统美学在圆明园中体现出了与皇权的统一和程式化的发展；圆明园造景大多是名诗名作描写的意境和著名画家的山水画的再现；圆明园中对南方园林的模仿和变体设计则使南北文化达到融合等等无不体现出圆明园景观的深刻文化内涵，展现圆明园景观是清代文化载体的特色。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。