differential eguation

Establishing elementary differential eguation with considering viscosity infection, through the medium with finite difference decompounding to analyse the effect of high-viscosity oil's viscosity to sand production in oil well.

建立考虑粘度影响后的基本微分方程，通过有限差分分解来分析稠油粘度对油井出砂的影响。

In theory, The noise elimination capacity is calculated by the method which the characteristic equation of noise elimination of the dissipative silencer is translated into the constant differential eguation.

在理论上，采用了将阻性消声器的消声量特征方程转化为常微分方程的计算方法计算消声量；

This paper analyses development process of a double nested extended nozzle by using the motion theory on center of mass, and a normal differential eguation of second-order is obtained.

用质心运动定理对双节套筒式延伸喷管的展开过程进行分析，得到一个二阶常微分方程；

These character base finite difference method strike up Fourier conduction differential eguation, Deduce well type resistance furnace wall, interface and inside and outside surface astable temperature field calculation formulae.

根据有限差分法建立起来的傅立叶导热微分方程，推导出井式电阻炉炉壁、界面及内外表面非稳态的温度场计算公式。

Dynamic model of CG is valve train in CG series motorcycle engine is built. By analyzing and computing differential eguation, moving law and status of bearing force are gotten.

建立了CG系列发动机配气机构的动力学模型，通过对运动微分方程进行分析和计算，获得了气门的真实的运动规律和受力情况。

The article has deduced a non-linear vibrational differential eguation for an unbalanced rotor under the dynamical coupling of bending by torsion with the efforts of torsional vibration to bending vibration under consideration.

考虑扭转振动对弯曲振动的影响，推导建立了弯扭动力耦合情况下，不平衡转子的非线性振动微分方程，然后用算例分析了这种情况下转子的振动特性。

Studies On The Simplest Formal In Particularly Solving Lacunary Differential Eguation

关于几个缺项微分方程特解最简形式的探讨

This paper applies the differential eguation for Hu Hai-Chang's middle-thick plates and its boundary conditions, putting forward four types of try function: 1.Beam-function 2.Levy-function 3.Hyperbolic and triangular series 4.Elastic foundation membrane function.

本文采用胡海昌的中厚板的微分方程及边界条件，用加权残数法求解，并提出四种试函数：1.梁函数；2.李维（M.Levy）函数；

A boundary value problem of a totally hyperbolic partial differential eguation of third order

一个三阶全双曲型偏微分方程的边值问题

The heat transfer mechanism and the main affecting factors of twin roll strip casting was discussed, and bulit the general heat transfer differential and difference eguation.

本文探讨了双辊薄带铸轧过程的传热机理和主要的影响因素，建立了广义条件下的热传导方程，并对潜热问题做了处理。

New Operator solution Of Higher Order linear Differential Eguation with variable coefficient

引入了方向算符（？）高阶变系数线性微分方程的新算子解法

According to the differential eguation of ventilated process of stope, deduced the calculation formula of required quantity of air current of stope;

根据采场通风过程的微分方程，推导出采场需风量的计算公式；

The temperature and the thermal stress distribution in laser medium were got based on the stable thermal differential eguation and the balance equation respectively.

分别从激光介质稳态导热微分方程及平衡方程出发，得出激光晶体温度场及热应力分布规律。

Given a method to solve order-2 Linear differential eguation with complex variable coefficients, by un-determinate function.

利用待定函数，给出二阶复变系数线性微分方程通解的一种求法。