数值方法

The main content of this paper is to research dynamic behavior and stability of nonlinear rotorbearing system, study the numerical methods that is used to this kind of system, solve oil film forces and its Jacobian matrix at any moment, in order to offer basis for project design.

本文主要研究非线性转子—轴承系统的动力学行为和稳定性，研究用于该类系统非线性动力特性的数值方法，求解任一时刻轴承油膜力及其雅可比矩阵，为工程设计提供依据。

As an exact numerical method, the Method of Moments has been extensively applied to electromagnetic simulations.

作为一种严格的数值方法，矩量法已广泛应用于各种电磁问题分析。

Monte Carlo simulation, an effective method for option pricing ,had rapid development in recent years.

蒙特卡洛模拟作为期权定价的有效的数值方法之一，近年来发展迅速。

Quantum Monte Carlo is one of the most important methods, which is widely applied in research of many bodies problems.

在诸多的数值方法中，量子Monte Carlo 是其中最重要的一种，它在对多体问题方面的研究有着广泛的应用。

The paper derives detailly the viscoplastic strain velocities of joint, intact rock, as well as multilaminate rock mass corresponding to different stress states, and presents a viscous elastoplastic F·E·M·with consideration of the stepwise excavation sequence and different supporting time of lining in underground works with large cross-section.

分别推导了在不同应力状态下节理面、完整岩石和多组节理岩体粘塑性应变速率的计算公式。提出了节理岩体大断面洞室考虑分步开挖和不同支护时间的粘弹塑性有限元数值方法。

The mathematical model is dispersed by finite-volume method and the dispersed equations are solved by SIMPLER algorithm. This is the first time to solve a problem of drilling fluid mechanics with the numerical method of Newtonian fluid mechanics.

5首次将牛顿流体力学经常采用的数值方法用于钻井流体力学的研究中：用有限体积法离散钻井液流动和传热的数学模型，用Simpler算法求解该数学模型的离散化方程。

Differential Quadrature Method, one of numerical methods of solving boundary problem of differential equation is introduced in this paper. By using DQM, the dynamic stability of pipes conveying fluid and rectangular plates under the action of non-conservative force is studied. The main research work is as follows.

本文首先介绍了求解微分方程边值问题的一种数值方法—微分求积法，然后采用微分求积法分别对输流管道和非保守矩形薄板的稳定性问题进行了分析研究，具体有如下三方面的研究内容。

Our analysis framework relies on the reflected Backward Stochastic Differential equation approach.We characterize the value functions of the noncallable bonds in terms of the reflected Backward Stochastic Differential equation,Then the relationship between the value function of convertible bonds and reflected backward stochastic differential equations with single reflect is built at the same time,and provide the optimal conversion strategy for bondholders.2:We get the value of non-callable convertible bonds by numerical methods.

探讨了可转换债券的最优停时价值与带反射边界倒向随机微分方程解的关系，在市场完备，公司价值只包括股权和可转债这两种权益等各种假定下，给出不可赎回可转换债券的价值函数，证明了不可赎回可转换债券的最优停时问题的解是存在的，同时给出了其最优的转换策略。2：通过数值方法求解不可赎回可转换债券的价值。

A new method is presented in this paper for solving unsteady nonlinear convection-diffusion equation with the source term.

本文提出一种新的求解含源项，非定常、非线性对流扩散方程的数值方法。

This paper discusses a kind of nonlinear Sine-Gordon equation and provides a new numerical method for solving the equations.

本文讨论了一类非线性Sine-Gordon方程，并给出了一种新的求解该方程的数值方法。

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