查询词典 differential method

First, theoretical analysis methods were used for the static analysis of the suspension bridge. The formulas for endogen force of the asymmetry suspension bridge through elastic theory were deduced and they were contrasted with those of the normal suspension bridge. The basic differential equation of deflection theory was deduced and the method of getting the roots of the equation was offered, and some simplified methods for deflection theory were presented.

推导了非对称式悬索桥弹性理论的内力计算公式，并对比了其与对称式悬索桥弹性理论的内力计算公式的异同；推导了非对称式悬索桥挠度理论的基本微分方程，并且给出了部分均布荷载作用下基本微分方程的试算方法；提出了挠度理论的几种简化计算方法。

A high accuracy finite volume element method was given based on cubic spline interpolation for linear and nonlinear twopoint boundary value problems of ordinary differential equations. The computational scheme was derived and the property of positive type was discussed. Further we presented the convergence analysis and the scheme was proved having fourth order error estimate in discrete energy norm.

针对常微分方程线性和非线性两点边值问题，提出了基于三次样条插值的高精度有限体积元方法，给出了具体计算格式，讨论了格式所具有的优良性质--正型性，并应用能量方法给出了收敛性分析，证明了格式按照离散能量模具有四阶精度。

Then the basic fundamental and method of the computation of thermal load of the heated parts of internal-combustion engine are elaborated, the deflective differential equation of heat conduction, basic equation and boundary condition of the theory of thermo elasticity and numerical computation by FEA are introduced.

接着阐述了求解内燃机受热零部件热负荷的基本原理和方法，介绍了热传导的偏微分方程、热弹性理论的基本方程和边界条件确定的原则以及用有限元法进行的数值求解。

Solving a differential equation 2 Euler, Euler and improve previous trapezoidal method.

求解一阶常微分方程的两个欧拉法，先前欧拉和改进梯形法。

The convergence of the Euler method for stochastic differential equation dx =f x (t, x t-δ(t, r dt+g x (t, x t-δ(t, r dW with variable delay and Markovian Switching is investigated.

讨论了马尔可夫调制的随机变延迟微分方程dx=fx(t，xt-δ(t，rdt+gx(t，xt-δ(t，rdW欧拉方法的收敛性。

By employing the theorem on existence and uniqueness of solutions, the existence and uniqueness of path is proved. A method of solving ordinary differential equation systems is proposed to get the trajectory of SVM solutions.

利用微分方程组的存在唯一性定理，我们得到了路径的存在唯一性，并给出了一种常微分方程组的近似解法求解SVM解的路径。

Aiming at the physical model inapplicability of flash method to measure thermal diffusivity of semi-transparentmaterials, a new physical model was proposed. In the model, according to the permeance of materials, the pulse laserabsorption of materials is of exponential type, and the authors establish a relevant differential equation and get a analyticalform.

针对传统的闪光法在物理模型上不适于用来测试半透光物质热扩散率的问题，提出了一个新的物理模型，该模型根据物质的透光性，确定样品对脉冲激光的吸收为指数型，建立了相应的微分方程并求得其解析解。

An Extension on Differential Mean Value Theorem of Cauchy ;2. Infinitesimal in Cauchy ′s Cours d′ Analyse;3. This paper studies and analyzes the reasons and the background of Cauchy defined the residue concept,in which we have used the method of historic analysis and literature review.

采用历史分析和文献考证的方法，探讨和分析了柯西定义留数概念的原因及背景指明柯西从一些数学家的相关工作出发，在对C-R方程进行了讨论和分析之后，产生了他关于复积分问题的讨论。

Wahlquist and Estabrook proposed a theory of prolongation structures of the nonlinear evolution equations in terms of Cartans exterior differential form method and successfully applied it to kdv equation.

Wahlquist和Estabrook最早利用Caftan的外微分形式方法提出了非线性演化方程的延拓结构理论，并且成功地讨论了kdv方程的延拓结构。

In the first of this paper, by the partial differential equations of heat exchange and finite element method, the mathematical causes which result in calculative errors of temperature fields as different initial temperature on the joint face of concrete construction was analyzed.

本文首先从热传导的偏微分方程和有限元法入手，分析了分期浇筑混凝土结合面上节点初始温度取值不同时，造成温度场计算结果偏差的数学原因。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。