查询词典 analytical differential

Unfortunately, most of the analytical solution for fractional differential equation are complicated owing to complex series or special functions.

然而大多数分数阶微分方程的解析解含有复杂的级数或特殊函数，不利于近似计算。

There are various techniques for constructing analytical approximations to the nonlinear differential equation.

早期研究非线性振动的理论分析方法多局限於弱非线性振动系统，碰到强非线性振动系统就显的无能为力。

A damage identification method based on axial vibration was presented on the basis of theoretical derivation axial vibration differential equation and analytical solution of three kinds of support form.

在理论上推导悬臂梁轴向振动微分方程及其3 种支座形式的解析解的基础上，提出了一种基于轴向振动的结构损伤识别方法。

With this model analytical solutions for differential equations of the projectile's motion within an ideal bore can be obtained. Comptations for some projectile...

求得了对称弹丸在理想身管中的运动微分方程的解析解，并对某些弹炮系统进行了计算，得出了一些有用的结论。

Through the analytical solutions of momentum differential equation for a stream with varying mass, a general characteristic parameter , depending on structure scale and flow parameter, is introduced.

在径向流体分布器的变质量动量方程理论模型的基础上，通过对模型解析解的分析，获得了包括径向分布器结构尺寸和流动参数的特征参数k／C。

The analyzer introduced in this paper has nine polarographic analytical techniques including the differential pulss polarography and the square wave voltammetry, etc.

本文介绍的微电脑多功能极谱仪具有微分脉冲极谱法和方波伏安法等九种极谱分析技术。

On the basis of the simplified differential equations, analytical solution of the radiation damping coefficient for a thin layer is derived, and then a simplified formula taking into account of a number of important influence factors is obtained.

求解了薄层辐射阻尼的解析解，并拟合了包含足够信息同时又便于使用的近似公式。

To solve the B-Ss pricing formulas,there are many popular methods now,such as partial differential equation,analytical approximation,binomial tree methods,finite difference method and Monte-Carlo simulation.

对于Black-Scholes期权定价模型，如今比较流行的定价方法有偏微分方程、解析近似方法、二叉树方法、有限差分方法和Monte-Carlo模拟等。

The analytical solution of 1-D convectional-dispersion differential equation with the hydrodynamic dispersion coefficients so determined can very well simulate the salt and water movement processes in the soil columns.

采用如此计算得到的水动力弥散系数D值代入经典的一维对流-扩散方程能很好地预报饱和土壤的水盐运移。

It is generally difficult to get analytical solutions of the stochastic differential equation's water quality model. What is more, as to the issue like the initial boundary result of a convection-dispersion equation, it is even more difficult to change the random factors into the uncertainty.

NSFEM法是把Neumann展开式引入以解决矩阵求逆的效率问题，如果对每一次随机抽样，只需形成刚度矩阵，进行前代、回代以及矩阵乘和矩阵加减，而无需矩阵分解，则可大大减少工作量。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。