approximations的例句大全

The term by term expansions of the standard and a modified finite element approximations for two-point boundary value problems

两点边值问题标准与非标准有限元解的逐项渐近展式

The half discrete difference scheme of forth-order is used to transform the delay partial differential equation into the delay ordinary differential equations. The higher accurate approximations are obtained when the precise time-integration method is applied to the delay differential equations. 5.

利用四阶精度半离散差分格式把延迟偏微分方程转化为延迟常微分方程组，应用精细时程积分法于延迟常微分方程组，得到了高精度的近似解。

Analytical expressions are obtained on short time and long time approximations.

在短时和长时近似下，得到了解析表达式。

The correction method by semi-discrete approximations for the first kind of semi linear elliptic boundary problem

半线性椭圆型方程第一边值问题半离散校正法

S: High gradient is an important aspect of key characteristics in engineering. The paper focuses on the descriptions and the treatments of this characteristic, including approximations of polynomial, composite function and Bezier based function.

高梯度是工程中关键的特征之一，本文讨论和研究描述高梯度问题的函数逼近，包括：多项式函数逼近、复合函数逼近、Bezier函数逼近。

Elementary Approximations of Classical Emden Equations on Unit Ball

单位球上经典Emden方程的初等逼近

Several probable questions on "a study of a semiclassical approximations for heavy ion transfer reactions"

关于重离子转移反应半经典近似研究一文中几个可能的问题

In attempting quantitative quantum mechanical treatment of chemical bonds, approximations must be made.

在试图定量地用量子力学去处理化学键时，人们必须采用近似法。

These formulas make the approximations for the derivatives at these points in a nonsymmetrical manner.

这些公式使得这些点子上的导数近似式是非对称形式.

In such incomplete information system, the universe of discourse is classified by the maximal tolerance classes, and fuzzy approximations are defined based on them.

在不完备模糊目标信息系统中，首先利用最大相容类对论域分类，基于最大相容类定义模糊近似。

The expansion in U-series has advantageous properties for approximations in both quadratic norm and uniform, and it can be realized to express a group of parametric curves which are piecewise k-degree polynomials in a number of finite terms of U-series.

该系统下的U级数展开式具有良好的平方逼近及一致逼近性质，而且能用有限项U级数实现对分段k次多项式参数曲线图组的精确表达；

On the Solution of the Control Parametric Transport Equation with Periodic Boundary Condition and the Convergence of the Discrete Ordinate Approximations

具周期边界条件控制参数迁移方程的解及其离散纵标逼近的收敛性

First, we construct the formal asymptotic approximations of the initial-layer solution to the flood wave equations by the weaker stability conditions. Initial D

然后文章充分利用弱稳定性条件和方程的特殊结构，结合经典的匹配原理和初始层修正的方法对流波方程作了形式逼近展开。头文字D漂移族

As an example, we use a sequence of LTV PDEs to approximate the nonlinear wave equation and prove the convergence through finite approximations of PDE.

使用一系列线性时变PDE方程对非线性的波传播方程进行迭代逼近。通过使用有限维系统对PDE进行近似，证明了迭代逼近法的收敛性。

by using the mean values of the periodic coefficients, the approximations of the unstable frequencies are obtained.

用周期性系数的平均值法获得了不稳定频率的近似值。

the accuracy of this approximation is higher than eddington and δ-eddington approximations. the approximation is suitable for the present inversion algorithm by which details of extinction coefficient profiles of cloud and aerosol are not needed.

本文还发展了一个二层模式的半经验的δ－Eddington近似，其精度优于Eddington和δ－Eddington近似，而且无须知道云和气溶胶消光系数的垂直分布，适用于本反演算法。

iterative approximations of fixed points for asymptotically pseudo-contractive mappings in normed linear spaces

赋范空间中渐近伪压缩映象不动点的迭代逼近

quadratic approximations in two dimensions.

二维中的二次逼近法。

similarity search in data stream with adaptive segmental approximations

基于适应性分段估计的数据流相似性搜索

Values are not approximations to prices nor a necessary step in their calculation.

价值并不是价格的近似值,也不是价格计算必须的步骤.