近似方法

Even when the results under the two sampling systems were similar,typical mode sam- pling saved substantially cost and labor(by 2/5)and time(by 17/20)over random sampling.

即使两种抽样方法结果相近似，但典型众数抽样在布点、经费、人力及时间等方面比随机抽样为少，仅及随机抽样的3/5与3/20。

The granular discrete element method can be applied to the partials, whose shape can be approximately described as a sphere.

离散元法是分析散体力学行为的数值方法，颗粒离散元法适用于单个几何形状可用圆球近似而不产生显著差异的情况。

The inverse problem is solved using conjugate gradient method of minimization based on discrete ordinates method of radiative transfer equation.

该方法是在辐射传递方程离散坐标近似的基础上，用求目标函数极小值的共轭梯度法进行反演计算。

Based on the technology of machining the tooth profile of hobbing shaving cutter for cutting hardened gear, the approximate forming of the tooth profile on normal section is carried out by means of straight line fitting, arc fitting and hyperbola fitting.

基于硬齿面滚剃刀齿形的制造方法，分别采用直线、圆弧、双曲线拟合法对滚剃刀法截面齿形进行了近似造型。

This paper aims to study some important problems of clutter modeling and simulation, which include as follow:According to the principle that each quadrature component of K-distributed clutter can be modeled, exactly or approximately, by a weighted sum of products of two independent Gaussian variables, a new method for modeling and simulation of correlated coherent K-distributed clutter is presented.

本文对海杂波的分析与建模中的几个关键问题进行了研究，主要包括以下内容：根据K分布杂波的两个正交分量可由两列相互独立的高斯矢量的加权乘积和精确或近似构成的原理，本文提出了一种新的相关相干K分布杂波建模与仿真方法。

In order to analyze the characteristics of multi-position pumped fiber laser expediently, the predominant part of the re-emission was adopted to improve the solutions precise, and the rate equations describing the Yb-doped multi-position pumped fiber lasers were solved analytically.

为了方便地对多点抽运光纤激光器的特性进行分析，采用保留上能级粒子再发射项主体部分的方法以提高精确度，解析求解了多点抽运掺镱光纤激光器的稳态二能级速率方程组，得到了光纤激光器的输出功率的近似解析解。

To re-entrant lines with product form solutions, which can be analyzed by MVA, simulated annealing is adopted to search optimal solution of inspection allocation.

对近似满足乘积形式解的可重入生产系统，以均值分析作为性能分析的工具，用模拟退火方法解决了检测站的设置的寻优问题。

The construction of the solution space for shallow-water equations on the equatorialβ?plane and the equations about the tropical circulation to heating are mainly studied. The solution method of exact solution in the analytic function class and the computational procedure to the series solution are expressed for the well-posed problem.

平面近似的浅水方程组和热源强迫的热带环流方程组，重点研究了它们的解空间构造，并给出了各种适定的定解问题在解析函数类空间中准确解的具体的求解方法，并编制程序去计算其级数解。

We consider the existence of a solution u ∈L2 and we use a wavelet Galerkin method with the Meyer multi-resolution analysis,to filter away the high-frequencies and to obtain well-posed approximating problems in the scaling spaces Vj.

我们考虑存在解u∈L2用小波伽辽金方法和Meyer多分辨分析去滤掉高频部分，从而在尺度空间Vj上得到适定的近似解。

In the paper, the solution to the optimal structural design of machine tool spindle with respect to dynamic properties based on artificial neural network and genetic algorithm is studied.

本文研究了基于人工神经网络和遗传算法的机床主轴动态特性结构优化设计的求解方法，利用人工神经网络实现机床主轴动态特性的近似分析，借助遗传算法实现给定固有频率下的最小重量设计。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。