格分布

The reactionsystem of polyesterification of DFA and EG was analyzed and simplified. Based on thehypothesis of equal and unequal activity of the end-group of monomer and polymer,the modelⅠand modelⅡfor estimating kinetic parameters were established usingimproved Genetic Algorithm, which was so improved by introducing the Elitist Model,Simulate annealing, Runge-Kutta method, proportional distribution randomizer etc.into the operators, and these models were more compatible with the estimation ofcomplex reaction kinetic model parameters.

对二聚脂肪酸与乙二醇缩聚反应体系进行了分析和简化，基于单体和聚合物端基等活性及不等活性的假设，采用已加入最优保存策略、变量数值扰动、龙格库塔积分(Runge-Kutta)算法、均匀分布的随机数发生器算子的遗传算法，建立了模型Ⅰ和模型Ⅱ，并利用C~计算机语言编程来估算动力学模型的参数。

A novel fault identification algorithm based on smooth pseudo Wigner-Ville distribution is proposed, which focused on the time-frequency analysis of network traffic.

通过研究网络流量的时频分析，提出了一种新的基于平滑魏格纳分布的故障识别算法。

A new pseudo Wigner distribution in the Fractional Fourier transform domain is proposed to analyze single or multi-component chirp signals.

提出了一种新的基于分数阶傅里叶变换的伪维格纳分布，用于单分量或多分量chirp信号的分析。

Compared with Smoothed Pseudo Wigner-Ville Distribution,this algorithm can reduce the cost of computation,save operation time under the situation that keep approximate performance and is suitable for real-time analyzing.

与平滑伪维格纳分布相比，在保持相似性能的情况下，该算法运算量比较小，可以有效地节约运算时间，适合于快速跳频信号的实时分析。

Time-frequency analysis ; fractional Fourier transform ; pseudo Wigner distribution; chirp signal ; short-time Fourier transform

时频分析；分数阶傅里叶变换；伪维格纳分布； chirp信号；短时傅里叶变换

Too much emphasis has been laid on thephase coherence detection using the arithmetics of auto-correlation in time domain,spectrum analysis in frequency domain and feature extraction of intra-pulse modulatedsignals employing the methods of quadrature in time domain、Short Time FourierTransform、Wigner-Ville Distribution and Radon-Wigner Transform.

本文详细介绍了脉冲多普勒雷达的原理及其信号特征、相参性原理、脉内调制信号、时频分析理论和模式识别理论等，重点讨论了利用时域自相关法和频域谱线分析法进行相位相参性的检测；详细分析了脉内调制特征提取的几种方法，主要包括时域正交、短时傅立叶变换、维格纳分布和 Radon-Wigner 变换。

All available three-component time series are used to extract the Rayleigh and Love waves. The Signal-to-Noise Ratio at different periods and the azimuth distribution of the inter-station pairs with high SNR are discussed.

通过对三个分量记录的相关运算，获得了Rayleigh波和Love波的经验格林函数，分析了其信噪比随周期的变化和高信噪比台站对的方位分布。

The relatively slow whole-body distribution of lactated Ringer's solution, which boosts the plasma volume expansion during and for up to 30 min after an infusion, is probably governed by a joint effect of capillary permeability and differences in tissue perfusion between body regions.

相关显示乳酸林格氏液在注射后30分钟内在全身分布的血浆扩容效果可能由血管通透性及不同身体解剖区域组织灌注有关。

Any commercial use or distribution without the express written consent of getty images is strictly prohibited.

任何商业用途或不明确的书面同意，格蒂图片分布是严格禁止的。

Igbo people mostly live in south-east of Nigeria .

伊格博族人口众多，是尼日利亚的三大部族之一，主要分布在尼日利亚东南部。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。