条件方程

Absorbing boundary condition ; wave equation ; spectral element ; central difference method

吸收边界条件；波动方程；谱元；中心差分法

According to the equation of chromatographic dynamics , we can get the second central moment and the third central moment of elution curve of HPLC under linear nonideal conditions.

从液相色谱过程动力学方程出发，运用电子计算机证明了在线性非理想条件下高效液相色谱体系中不同保留值组分在柱末端峰形的分布基本一致的结论。

Amukhin et al.,and convert it into an effective1D chain with particular distribution of equivalent coupling bonds.Then we use the single-electron Schrodinger equation to calculatewave functions of electrons in the chain by transfer matrix method,without using the assumption of Samukhin et al.On variable hoppingmechanism and critical percolation condition.From this calculationwe obtain the dc conductance directly from Landauer-Buttikarformula.

mukhin提出的多层次等级分形结构模型，将其简化为耦合键强度t具有特殊分布的等效一维链，舍弃前人假设的变程跳跃机制与临界渗流条件，从单电子薛定谔方程出发，用转移矩阵方法计算一维链的透射系数，再利用Landauer-Buttickar公式直接求出直流电导。

The Computer-aided method also exploits the characteristic of linear differential equation with two additional approximations.

计算机辅助法也充分利用了线性微分方程的特点及另外两个合理的近似条件。

So, a necessary and sufficient condition for the system to be stable is that the roots of the characteristic equation have negative real part.

因此，系统稳定的一个必要充分条件是特性方程的根有负的实部。

Boundary conditions on the surface of an airfoil are implemented by using their first-order expansions on the mean chord line.

提出了一种应用近似边界条件在固定的笛卡尔网格上求解非定常欧拉方程来解决气动弹性的方法。

It is the well-known Lame's formulas for the stresses in a hollow circular cylinder subjected to uniform pressures.

在此 ，针对实际问题的需要，在三维空间中构建了一个既满足双调和方程又满足边界条件的新应力函数，推导出厚壁

Non-linear resistance;volt-ampere characteristics;Clairaut equation; power matching

非线性电阻；伏安特性；clairaut 方程；功率匹配条件

The numerical modeling process for SVE remediation is achieved after a steady alternant direction implicit finite difference format is developed. In this paper, as an example, the 60 days remediation under 4 different conditions is simulated, which proves that the clear-up result is mainly governed by soil permeability.

再采用一个稳定的交替方向有限差分解出传质微分方程，从而实现多维情况下竖井SVE修复的完整模拟过程。4组不同条件下为期60d的SVE修复过程的计算机模拟显示，土壤通透系数是决定修复效果的关键因素。

In our model the probability density function of the jump size p is general. A closed series formula of the price is given by introducing some kind of Green function and the optimal exercise boundary of the perpetual put option is given by the smooth junction condition.

文章强调跳量的概率密度函数p是一般形式的，通过偏微分方程方法引入格林函数，给出永久美式看跌期权的价格，并通过自由边界条件给出最佳实施边界的显式表达式。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新