查询词典 approximation method

A method for the generation of Weierstrass fractal surface is presented,based on Helmholtz equation,with the Kirchhoff approximation,the calculus formula of light scattered field on the 1-D Weierstrass fractal suface is deduced.

采用Weierstrass分形函数模拟实际粗糙表面，从简谐光波满足的亥姆荷兹方程出发，利用基尔霍夫近似推导出一维Weierstrass分形粗糙表面的光散射场的积分公式，考虑遮蔽效应后数值计算并分析了表面散射光强的角分布特性。

Based on the error estimates of moving least-square approximation, the error estimates for the finite point method are obtained.

基于移动最小二乘法的误差公式，本文讨论了有限点法的误差估计。

The method does not require the supremum of the optimal approximation error being known.

引言月球探测车在松软土壤上行驶时的驱动动力学非常复杂。

The analysis of affine approximation error shows that the proposed method can achieve sub-pixel accuracy when the surface does not curve too much.

文中对仿射变换近似带来的精度损失进行了分析，证明该方法能够达到分象素的精度。

In the second chapter, we study the mixed finite element method of Oldroyd B type viscoelastic fluid flow model, and we give the existence and uniqueness of approximation solution and error bounded.

第二章讨论用混合有限元方法去研究Oldroyd B型流体流动问题的解的存在唯一性，并给出了逼近解的误差估计。

In this method,the main control law is approximated by an adaptive fuzzy system directly;the approximation error and disturbing torqu...

在控制律的设计中，将自适应模糊系统直接用作系统的主控制律，利用扩张状态观测器对模糊系统的逼近误差和内外干扰力矩进行观测并予以实时补偿。仿真结果表明了方法的有效性。

To reduce the distortion of this,the beginning of this article proposes an effective allocation model based on the performance optimization method;To achieve such a rapid and low complexity of the distribution,and it proposes a semiregular mesh geometry coding related to the reconstruction of the mean square error of approximation.

为了降低这种失真，开始部分提出了一种有效的基于位分配模型的性能优化方法；为了实现这种快速和低复杂度的分配方法，提出了和半规则网格几何编码相关的重建均方误差的近似方法。

In this method, two fuzzy logic systems are used to approximate unknown functions, and an error compensator is designed to reduce the influence of approximation error on tracking accuracy.

针对一类非线性系统提出了间接自适应模糊控制方法，该方法用模糊逻辑系统逼近未知函数，并设计误差补偿器来减少逼近误差对跟踪精度的影响。

Finally, the proposed method is applied to the problem of nonlinear function approximation.

最后将所提出的方法用于解决非线性函数的逼近问题。

This method is used extensive in the Pattern Recognition,Approximation of Function etc.

本文选取了两种算法中具有代表性BP算法和SVM来阐述优化算法的具体实现和应用。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。