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fast approximation
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  快速逼近
     A New Programming Algorithm of Fast Approximation for True Value-Method of Fractional Steps Error
     一种新的快速逼近真值的程序算法──分布误差法
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     By creating a new sequence {a n} ,of which the recursion formula is a n=a 2 n-1 -2 , a fast approximation to a periodic continued fraction r,r= lim n→∞a na 1a 2…a n-1 is obtained,and an application of the solution of Pellian equation is given.
     本文通过建立一种新的数列{an},其递推公式为an=a2n-1-2,得到了对周期连分数r的快速逼近:r=limn→∞ana1a2…an-1,以及Pel方程的解的一个应用
短句来源
     A Fast Approximation Method of Two Bicubic Bezier Surfaces
     双三次贝齐尔曲面快速逼近方法
短句来源
     THE FAST APPROXIMATION TO PERIODIC CONTINUED FRACTIONS
     周期连分数的快速逼近
短句来源
     The author has derived a fast approximation formula for computation of system interconnecting impedance which will make the real-time estimation of the optimalsystem impedance possible. This approach will enhace the development of high per-formance computer-aided relay protection that will automatically accomodate to the opera-tion mode change of large power network.
     本文提出了一种系统联系阻抗快速逼近公式,使保护能实时取得系统联系阻抗最优估计值,为研制自动适应运行方式变化的高性能计算机保护创造了条件。
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  “fast approximation”译为未确定词的双语例句
     Fast approximation for network flow optimization Ⅱ
     网络流优化的快速数值逼近算法Ⅱ
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     A FAST APPROXIMATION METHOD FOR GENERATING N(0,1) RANDOM VARIABLE
     产生N(0,1)随机变量的一个快速近似法
短句来源
     Adaptive,accurate and fast approximation of response curve using the Padé interpolation and statistic inference
     统计推断约束下响应曲线的自适应Padé插值逼近
短句来源
     In this paper a fast Approximation sample method is given in which the density decomposition method is combined with the table-lookup one for generating N(0,1)Random variables.
     本文用密度分解法和查表法的结合构造出一个产生 N(0,1)随机变量的快速近似方法。
短句来源
     Based on the analysis of Chebyshev orthogonal polynomial neural network nonlinear filter,and by using the fast approximation characteristics of Legendre orthogonal polynomial and the structrue of decision feedback equalizer,two nonlinear equalizers with new structures are proposed,and an adaptive algorithm is deduced with the normalized least mean squares(NLMS).
     在分析Chebyshev正交多项式神经网络非线性滤波器的基础上,利用Legendre正交多项式快速逼近的优良特性以及判决反馈均衡器的结构特点,提出了两种新型结构的非线性均衡器,并利用NLMS算法,推导出自适应算法.
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  fast approximation
On the fast approximation of some nonlinear operators in nonregular wavelet spaces
      
We present fast approximation algorithms for the maximum short flow problem and for testing whether a short flow of a certain size exists between given vertices.
      
We show that the problem of allocation is NP-complete in general, but has a fast approximation algorithm that comes within a factor of $\frac 32$ asymptotically.
      
A modified fast approximation algorithm for the 0-1 knapsack problem with improved complexity is presented, based on the schemes of Ibarra, Kim and Babat.
      
This paper proposes a fast approximation algorithm for the single linkage method.
      
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In this paper a fast Approximation sample method is given in which the density decomposition method is combined with the table-lookup one for generating N(0,1)Random variables.In region|x|>3,this method generates exactly normal random Variables.In region|x|≤3, the random variable generated by this method is Approximately normal. In most part of the region|x|≤3 the RSRD v≤0.0005 is only in 1% of the region near the ends,the RSRD v≤0.0034.This accuracy is suf- ficient for most types of the simulation problems...

In this paper a fast Approximation sample method is given in which the density decomposition method is combined with the table-lookup one for generating N(0,1)Random variables.In region|x|>3,this method generates exactly normal random Variables.In region|x|≤3, the random variable generated by this method is Approximately normal. In most part of the region|x|≤3 the RSRD v≤0.0005 is only in 1% of the region near the ends,the RSRD v≤0.0034.This accuracy is suf- ficient for most types of the simulation problems in practice.In ord- er to save storage,we use a dividing technique of“unequal intervals” which can decrease the storage significantly.

本文用密度分解法和查表法的结合构造出一个产生 N(0,1)随机变量的快速近似方法。在|x|>3区间上所生变量是概率精确的;在|x|≤3区间上,所生变量是概率近似的,其随机均方根偏差≤0.5×10~(-3),只在两端处的1%概率区间上,其随机均方根偏差≤0.34×10~(-2),此精度足以满足很大一类的实际问题的模拟.为了节省存贮,我们提出了一种“不等间距”的分割技巧,采用此技巧使存贮量以数量级下降,大大提高了查表法的实用价值.

The methode of analysis of time—delay and scaled linear systems by Fourier Series is presented. In terms of the expansion, time—delay and scaled analysis and orthogonalty of Fourier Series, the time—delay and scaled. systems can be turned into algebraical equation and solved by computor. Because of the complete onthogonalty of Fourier Series, faster approximation speed and more accurate computing matrix, using Fourier series to analyse time—delay and scaled linear systems has some practical meaning.

本文提出了一种用Fourier级数分析延时比例线性系统的简便方法。通过把系统变量的展开,并借助本文提出的Fourier级数的延时分析法和比例分析法,以及Fourier级数正交特性分析法,将延时比例系统转化成一个代数方程并可借助计算机求解。由于Fourier级数是一种完备的正交函数,且具有较快的收敛速度和非常精确的运算矩阵。所以用Fourier级数来分析延时比例线性系统对信号系统的时域分析有一定的实际意义。

The distorted shape of array is one of the main reason, which results the performance degeneration from the ideal situation of towed line array. Based on the ordinary array shape distortion, the directivity function of towed line array with distortion is presented in this paper. An algorithm for precisely determining the coordinates of each element by means of the inverse elliptic function is derived. A fast approximation of recursive formula for solving distorted array shape is given. According to the...

The distorted shape of array is one of the main reason, which results the performance degeneration from the ideal situation of towed line array. Based on the ordinary array shape distortion, the directivity function of towed line array with distortion is presented in this paper. An algorithm for precisely determining the coordinates of each element by means of the inverse elliptic function is derived. A fast approximation of recursive formula for solving distorted array shape is given. According to the comparison of ideal directivity and directivity of distorted array, a criterion for making decision of operational mode of towed line array is presented. So that the performance prediction problem in towed line array is solved. The results of system simulation in computer shows a good agreement with the theoretical analysis.

阵形畸变是拖曳式线列阵声呐性能偏离理想情况的主要原因。本文讨论在常见阵形畸变方式下,线列阵指向性的计算。给出在各种不同参数下求解椭圆反函数以确定每个基元的精确坐标的方法。同时给出一种递推的公式,用于快速求解畸变阵的阵形。根据对畸变阵指向性与理想指向性的比较,提出拖曳式线列阵的工作方式选取的准则。从而解决了拖曳式线列阵声呐性能预报这一课题。计算机模拟结果与理论分析完全一致。

 
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