数值方法

It is shown that these two sequences converge monotonically to a unique solution of the finite difference system.

给出一类求解具时滞边界条件的时滞反应扩散方程的数值方法，证明了迭代序列的单调收敛性以及差分格式的收敛

A well test interpretation model was established by taking into account the mutative permeability effect. This model was solved with simulation method.

基于这种动态渗透率效应，建立了低渗透油藏的试井解释模型，并采用数值方法进行了求解。

A numerical method for the T-matrix approach of light scattering by randomly oriented arid axially symmetric nonspherical particles performed in PC machine is presented first.

首先介绍了无规取向轴对称非球形粒子光散射的T-矩阵数值方法。

Influence of the magnetic field on the microstructure of AZ91 magnesium alloy;2. The results show that the current density, magnetic field intensity and electromagnetic force in melts are distributed nonuniformly to a great extent.

应用数值方法对直流电弧炉条件下的 Maxwell 方程进行了解析，结果表明，熔体中的电流密度、电磁场强度和电磁力的分布是非常不均匀的，电弧附近的钢水中的电流密度较其它区域高出 1～2 个数量级，电磁力较其它区域高出 2～3 个数量级，该区域的电磁力对熔体搅拌起着决定性的作用，预测了钢水的流形。

To investigate the dynamic stability of a two-degree-of-freedom manipulator as a system,differential equations of motion for this system were established on the basis of the Lagrange equation,and perturbed differential equations with period coefficients were derived for the period motion of this system by applying the perturbance theory.

为了研究两自由度机械手系统的动力学稳定性，基于拉格朗日方程给出了它的运动微分方程，并用扰动理论确定系统周期运动具有周期系数的扰动微分方程；根据F loquet理论对该系统扰动微分方程的平衡点的稳定性进行了分析，并用数值方法研究了平衡点失稳后的倍周期分岔过程。

The models and numerical method for the prediction of precooling and starting process of LOX/LH〓 rocket engine were systematically developed in this thesis with the emphasis on cryogenic thermodynamics and full range regime description.

本文以分级燃烧动力循环液氢液氧发动机的研制为背景，针对预冷与起动过程低温热流体动力学现象和大范围变工况特点，系统地研究了预冷与起动过程计算的模型与数值方法。

This paper uses a physical model to check the reliability of the numerical modeling proposed by Chen. As an example, this paper deals with a horizontal well pumpage underneath a river bed, or a vertical well adjacent to the bank of the river. We use the numerical method of Chen to simulate the groundwater flow pattern of the physical model.

论文针对具有典型意义的河床下水平井或傍河垂直井地下水流问题做了砂槽物理模拟，并用基于&渗流－管流耦合模型&和&等效渗透系数&的数值方法仿真模拟了此条件下地下水流的规律。

With help of WLC model of inhibition nervous system and lobster neural structure of Mulloney's, neuron electric spike of lobster stomatogastric neural system was numerically analyzed and the changing activity of gastric network and pyloric network were obtained.

利用抑制神经系统的WinnerLess Competition模型，通过数值方法分析Mulloney 型龙虾胃肠神经系统神经元的电位发放，得到胃研磨囊和幽门神经系统中各个神经元的电位发放和系统的节律变化。

The author deems that it is a practical way to treat these uncontinuous problems as contact problem in solid mechanics uniformly.

目前，有限元法等数值方法虽然已在岩土工程领域得到了广泛的应用，但计算中对不连续面的处理却仍是一个并未很好解决的问题。

Moreover, the internal flows of impeller, vaneless diffuser, bend and other parts of the stage are obtained by calculation, and the numerical results are discussed in details.

同时对计算结果进行了详细的分析。计算表明，本文所采用的紊流模型和数值方法能较好的预测离心压缩机各部件内部的流动。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐