查询词典 approximate method

The purpose of this dissertation is to study a principle or method to describe and analyze the complex problems with high gradients arising from practical engineering. The main contents cover:1. The Bezier function was introduced to approximate high gradient functions, and a suitable coupled function was derived. Some detail numerical results show that the Bezier-based function is dominant over other combination function such as polynominal and trigonometric series, when to describe a high gradient function.

针对工程中大量存在的高梯度问题进行函数逼近的研究，引入Bezier函数对高梯度问题进行函数逼近，构成以Bezier函数为主的复合逼近函数，数值考证表明：与常规多项式插值函数的逼近及"幂／三角"复合函数的逼近相比，基于Bezier函数的逼近函数对高梯度问题的描述具有明显优势。

The thesis proposes a trinomial tree method to approximate the CEV process and use it to evaluate different types of Asian options: average price option and average strike price.

2基于Black-Scholes 期权定价模型的假设条件，利用无套利原理，建立了两资产亚式彩虹期权定价模型。

According to the invention, a method for increasing quality of an enhanced output signal to approximate an undistorted sound signal is disclosed.

根据本发明，公开了把增强输出信号的质量提高到接近无失真声音信号的方法。

In this paper, two dimensional shallow flow—pollutants coupled model, which applies uninstructed grid finite volume method and Riemann approximate solver, is used to gain the trend of hydrodynamics and water quality change under the condition of driving force. Mechanism of nitrogen and phosphorous circle of WASP5 is considered in the water quality part of the model according to nutrition actuality of shallow lake in the cities.Xuanwu Lake is object of research in this paper.

本文针对城市浅水湖泊富营养化加剧现状，结合WASP5模型中有关氮和磷的循环机理，并将该机理写入已有的二维浅水流体水量模型中加以耦合，应用在无结构网格下的有限体积法与黎曼近似解求解的方法，求解湖泊在外驱动作用下的湖泊水动力和水质因子氮和磷的变化。

This integral equation is incorporated into a velocity-pressure variational formulation for the interior region, and a finite element method is used to approximate the resulting variational problem.

本文在绪论中简单介绍了边界元的发展历史及其发展现状，并把边界元和有限元做了简单的比较，介绍了它们各自的优缺点。

The method uses expansion in terms of scaling functions to approximate the axial field component and transforms the field equation into a matrix equation by applying a variational formulation.

在该方法中，用尺度函数把场分量近似为级数，通过变分公式把波导问题化为矩阵方程。

The approximate calculational method is reducing the cell number of the function of belief to simplify the count.

近似计算，即通过减少置信函数的焦元的个数简化计算。

In this paper, a time-domain blind source separation algorithm for non-stationary convolutive mixtures is proposed by reprogramming the vectors of convolutive mixture model and generalizing the joint approximate diagonalization method.

摘要该文将卷积混合盲源分离模型中的向量进行重新规划并对联合近似对角化方法加以推广，提出一种非平稳卷积混合信号的时域盲源分离算法。

Through the considering of two kinds of prior information—conjugate priorand noninformative prior,and by use of the method of Bayesian analysis,we obtain that the posteriordistribution of parameter in the model is approximate to Normal distribution.

考虑两类先验信息，即共轭先验和无信息先验，利用贝叶斯分析方法，得到模型参数的后验分布近似为正态分布。

Two examples are used to show that such perturbative method can be a useful way to obtain the approximate solutions of the Fokker-Planck equation.

我们发现，当外加力场具有某些时间的形式时，应用微扰近似法来解Fokker-Planck方程式可以得到精确解，同样地，我们也用两个例子来说明微扰近似法的实用性。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。