查询词典 direct numerical method

In order to investigate and develop numerical calculation method for Schr odinger equation, we apply the finite difference method to eigenvalue problems in quantum mechanics.

为研究和发展薛定谔方程的数值计算方法，本文将有限差分法应用到量子力学求解薛定谔方程本征值问题。

Equality design method was used in numerical simulations, and multiobjective optimization method was used to design the scramjet nozzle configuration.

通过均匀设计法设计仿真算例，并通过多目标优化设计方法设计出了性能较好的喷管结构。

The existence condition of first and second boundary variation was given with boundary variation method. The numerical method was obtained.

应用测度理论，将经典的变分问题，利用线性分析的方法转化为在几个Randon测度空间中寻找最优测度的有限维线性优化问题；从而得到最优控制律。

Except the same characteristic as the conventional boundary element method, this method avoids the nearly singular integral , so it is one of effect numerical calculation methods.

该方法继承了传统边界方法的优点，而避免了传统边界元方法遇到的边界积分奇异性问题，是该问题一个十分有效的数值求解方法。

Compared with the boundary element method based NAH, the variable interpolation, the numerical calculation and the disposal of singular integral are avoided in this method.

提出了以分布源边界点法作为声场的全息变换算法，建立了基于分布源边界点法的声全息重建和预测的数学模型。

The sparse matrix canonical grid method is a numerical method that was developed recently.

稀疏矩阵规则网格法是近年来才被提出的一种数值方法。

After the brief retrospect of spectral methods applied to get the numerical solutions of partial differential equations, the Walsh spectral methods are extensively studied. A new method of designing the "derivate operator" and a new Walsh spectral method based on quasi-Walsh order are proposed, which primarily prove the special uses of it.

回顾了数值求解偏微分方程的谱方法，比较深入地考察了数值求解偏微分方程的Walsh谱方法，提出了一种新的设计"求导算子"的方法，基于这样设计出来的"求导算子"，提出了一种新的基于类Walsh序的Walsh函数的Walsh谱方法，初步验证了这种序的特殊价值。

In order to study the stability of stratified rock slope in Zhu-Cheng road and its reinforcement method, the potential deformation and slipping mechanism of slope were analyzed using insitu-investigation and stereographic projection analysis method. The numerical calculation model for stratified rock slope was founded with UDEC software. The deformation of rock mass was analyzed in the excavation procedure, and the long-short compound bolt reinforcement structure was proposed according to the deformation failure mode of stratified rock slope.

摘 要：为了研究竹城公路层状岩质边坡的稳定性及防治措施，通过现场调查和赤平投影分析边坡潜在变形滑动机理；利用UDEC软件建立层状边坡数值计算模型，分析开挖过程中岩土体的变形情况；根据变形破坏模式提出层状岩质边坡的长短锚杆交替复合支护结构。

Meanwhile, with the finite element method with triangleas its basic unit, the numerical method to solve stope temperatur question is discussed.

同时，讨论了以三角形作为基本单元的有限元求解温度的数值法。

Based on experimental data,adopting a finite volume method,a numerical simulation method is applied to the three-dimensional flow field about the air-to-surface missiles at high subsonic speed and during the different angle of attack.

三维流场的数值模拟是国外军事技术发达国家在飞行器设计过程中所采用的重要方法。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。