边界值

Because the coupling condition of NNGFM arises from the net current continuity imposed at the volume element interfaces, the relatively complex conversion formulation for partial current continuity condition of NGFM is unnecessary when applying G. E. T., and computation time is saved. The coefficient matrix of the coupled equations is tridiagonal, so it can be solved by forward elimination and backward substitution method.

NNGFM的基准校验及在大庆200MW核供热堆(NHR-200)上的应用表明，NNGFM计算精度和速度与第三类边界条件格林函数节块法NGFM〓相当，在相同精度下速度比CITATION能快1000倍；NNGFM给出的本征值、功率分布较NNGFM误差能减少一半以上，为更精确计算工作期、卡棒当量提供了条件。

The nonlinear functional for singularly perturbed boundary value problems for elliptic equation with boundary perturbation is considered.

研究了具有边界摄动的非线性泛函椭圆型方程奇摄动边值问题。

As known, using the porential theory Green's tormulae and the fundamental solutions wecan reduce the harmonic and biharmonic elliptic boundary value problems to integral equationson the boundary.

我们熟知，利用位势理论或由Green公式及基本解出发区域内调和及重调和边值问题可归化为边界上的积分方程。

Under the appropriate assumptions, the asymptotic solutions of the problem with different forms are obtained according to the multiple number of the root of some equation, which is satisfied by the boundary value of the reduced problem, by giving the general expressions for the coefficients of outer solution expansion and the corresponding boundary conditions.

在适当的假设下，通过给出外部解展开式系数及其对应边界条件的一般表达式，根据退化问题的边值作为某方程的根的重数，得到了此问题不同形式的渐近解。

Potential theory is used to transfer the exterior boundary value problem into the boundary integral equation of the first kind. A iterated Tikhonov regularization and a modified Tikhonov regularization are presented to solve the integral equation.

利用位势理论将外边值问题转化为第一类边界积分方程，再分别利用迭代的Tikhonov正则化方法和改进的Tikhonov正则化方法求解积分方程。

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。

Then the coefficients of entrance region effect and the relations between them, and the flowbehaviour index n can be obtained by solving the energy integral equation. Under the assumption of the velocity distribution within boundary layer: f = 1-(1-η)n+1/n for example, co...

以边界层内幂律流体层流速度分布假设f=(1一η)~(n+1/n为特例，所求出的结果与文献[4]中的理论值和实验值比较表明，本文的计算是既简便又可靠的。

A Gaussian quadrature for the singular integral over subelements of an element is proposed and a family of comforing or non-conforming boundary elements ones to the 3-D BE analyses of EM fields is established.

然后为解决这两类边值问题的需要，系统地研究了计算三维电磁场的边界元方法。

These proposed functions are a kind of universal functions. Their main features are not self-regular, and that the value at the boundary of their feasible region is finite.

这些核函数是一类相当广泛的函数，它的主要特征是非自正则的，而且在其可行域边界上的值是有限的。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。