查询词典 asymptotic efficiency

The application of an appropriate apodization film to an ordinary lens makes the point amplitude response asymptotic to a Dirac-delta function, or causes an arbitrarily narrow depth of focus. This implicates that we may achieve lateral or axial superresolution through implementing an apodization film.

运用适当形式的光瞳滤波器可以改变成像系统点振幅响应的分布，使其具有类似于冲击函数(Dirac-delta函数)的形式，这样就有可能实现光学超分辨，但变迹术的运用往往会因其强烈的旁瓣效应而导致成像系统对比度的急剧下降。

Based on the simulation studies for different kinds of control modes and corresponding algorithms,the features,such as asymptotic of algorithm,the rate of convergence are discovered.Finally,some useful comments are given for further research.

通过对不同控制模式和与之相适应的滤波算法的仿真研究，揭示其算法收敛性和收敛速度等特性。

Asymptotic series method plays an important role in applied mathematics.

渐近级数展开法是应用数学中的一个重要方法。

Another problem that mathematicians tackled from about 1880 on is essentially the converse of finding asymptotic series .

大概从1880年开始，数学家们研究的另一个问题本质上是求渐近级数的反问题。

In this dissertation, we study the mean value problems of some special number theory functions, relation with some important functions and a series of asymptotic formulas about some hybrid functions.

本文研究了一些特殊数论函数的均值估计问题，以及它们与一些重要函数之间的联系，有关和式的一系列加权均值。

To describe the asymptotic behavior of certain time series or random fields,many ways of modeling the weak dependence have already been work out.

为了描述某些时间序列和随机场的渐近行为，许多作者引入了随机变量的相依性概念，其中最流行的就是混合概念。

The wave number is expanded into asymptotic series in terms of a small parameter. This method is exact and can approach any accuracy desired.

这一方法本身是精确的，它能达到任意所需的精度，然而四层和五层波导结构的数值计算实例表明，仅二阶近似解就足够精确了。

Secondly, the asymptotic series are used to evaluate the density function of heavy-tailed Rayleigh distribution, and an efficient three-step method is proposed using the interpolating polynomial fit.

其次， 本文使用渐近级数计算拖尾Rayleigh分布的概率密度函数，基于插值多项式拟合，提出了高效计算密度函数的三步方法。

An asymptotic series solution is constructed by the perturbation technique of deflection type for buckling and postbuckling behaviors of the cylindrical shells under external pressure.

考虑到边界效应对中短圆柱壳的影响及边值问题摄动解的一致性，详细研究了该圆柱壳端部边界层方程和奇异摄动解，以便与中部正则摄动解相匹配。

By sampling from the traffic flow and averaging non-overlapping blocks of size m from the original series, the variance asymptotic characteristic of the averaged series is obtained, from which this method shows that the splitting, assembling and merging process of the convergence mechanism will not change the Hurst parmeter of the traffic if the queue length of assemble buffer has a finite second-order moment.

在分析光突发交换边缘结点汇聚机制的基础上，提出了一种基于方差时间图的分析方法，利用"时间离散"和"尺度聚集"的思想，通过构造不同聚集级别m的聚集序列，分析得出业务流时间聚集序列的方差渐近性，从理论上证明了在组装器队长具有有限二阶矩的条件下，汇聚机制的分解、组装和合并过程不会改变业务流的Hurst参数。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48