抽样

Finishing calculation of mean value, standard deviation, skewness, kurtosis of Beta distribution.(2) Fitting parameters of many kinds of typical distribution and using residual deviation to evaluate fitting precision.(3) Using Beta distribution as an agreed indication distribution applied to many kinds of practical photoelectric measurement distributions.(4) Deriving theory formula of Bayes point estimation about Beta distribution parameters and mean value and standard deviation on the condition of mean square error loss function and supposed the prior distribution is uniform distribution.(5) Generating MCMC sample from post distribution by the method of Gibbs sample algorithm. Calculating bayes point estimation from sample on the condition of mean square error loss function. Calculating confidence interval by an approximate method to complete interval estimation.

本文的主要工作有：(1)解决了Beta分布参数a和b的精确计算以及均值、标准差、偏度、峰度的计算问题；(2)拟合出10余种典型分布的Beta分布的两个参数，并且采用剩余标准差评价该Beta分布的拟合精度；(3)对多种典型的光学与光电测量系统的测量分布进行了Beta分布统示表示；(4)在假设先验分布为均匀分布前提下，得到参数a和b以及均值μ和标准差σ在均方误差损失函数下的贝叶斯点估计理论计算公式；(5)利用直接抽样的Gibbs抽样算法，从后验分布中产生MCMC样本，从样本直接计算均方误差损失函数下的贝叶斯点估计，并使用一种近似方法计算其置信区间，完成区间估计。

A sampling inspection method of Binomial distribution based on sequential posterior odd test was discussed in detail, which was used to the test for torpedo system.

Bayes理论是分析研究具有小子样特点鱼雷可靠性的有效方法，文中基于序贯验后加权检验的思想，给出针对二项分布的抽样检验基木方法，并将其应用在鱼雷系统抽样检验试验中。

Methods The study was conducted by cluster sampling and stratified sampling.

采用整群抽样和分层抽样相结合的调查方法。

For larger populations, there are two methods of surveillance that are most applicable: systematic random sampling and cluster sampling.

对于数量较多的人群，有两种最适用的监督方法：系统随机抽样和分组抽样。

Firstly, the random scene of fire was assumed. And then according to the probability distributions of the random parameters of fire in the building, a large number of samples were obtained using mixed congruence method and inverse function method of Monte-Carlo. Finally, the performance of the samples was simulated using Ozone, and the failure probability of the structure in fire was analyzed.

该模型首先确定火灾随机场景，根据建筑物内火灾随机参数的概率分布，利用蒙特卡洛的混合同余法和反函数法产生火灾随机场景的抽样样本，然后利用OZone软件进行火灾下抽样样本的性能模拟，通过大量样本的模拟实现了结构在火灾下的失效概率分析。

Finally, an experiment is performed to prove that the output of our method has sufficiently uniform and the sample's curve of cumulative distribution function of packet size is fully conformed to the parent's.

通过软件编程实现了该抽样测量方法，并抽样采集了实际IPv6网络流量，实验数据表明其结果具有良好的均匀性，且总体和样本的数据报文大小的分布函数曲线吻合。

This invention relates to one MIMO-OFDM system simultaneous method, which comprises the following steps: a, processing relative computation by received local sequence and local ones to get relative peak and its side; b, processing filter on peak value and sides through one degree impact without limit; c, in the non integral digital sampling, the said peak value and its side are ordered to keep their position as time lag information; d, in the integral code sampling, it orders the peak value and its side and removes the sides and keeps relative peak position as time lag position to realize the simultaneous process.

本发明公开了一种MIMO-OFDM系统的同步方法，所述方法包括步骤：(1)将本地序列与接收到的序列进行相关运算，得到相关峰值及其旁瓣；(2)将所述相关峰值及其旁瓣通过一阶无限冲击响应数字滤波器进行滤波；(3)当所述MIMO-OFDM系统处于非整数倍码片抽样时，对所述相关峰值及其旁瓣进行排序，保留相关峰值及其旁瓣相应位置作为时延位置信息；(4)当所述MIMO-OFDM系统处于整数倍码片抽样时，对所述相关峰值及其旁瓣进行排序，并去除相关峰值旁瓣，保留相关峰值位置作为时延位置信息，从而实现同步。

Firstly, the outage model of components is decided; then based on the load variation curves of load nodes the sampling, calculation and analysis of various system states are performed by enumerative sampling method.

首先确定元件的停运模型，然后以各负荷点的负荷变化曲线为基础采用枚举抽样法对各系统状态进行抽样计算与分析。

For the reliability analysis of implicit limit state function, finite element analysis is a time-consuming process, and it impedes the application of normal importance sampling approach.

对于含有隐式极限状态方程的问题，重要抽样方法将大部分的计算时间用于结构有限元分析，这使得重要抽样的计算效率被大大降低了。

Although the process for calculating the optimal fixed sample size is quite simple, it doesn't stop unless the last sample collected. So it has the property of the fixed overall cost.

最佳固定抽样个数法虽然计算简易，但无提早停止抽样的特性，即有固定成本性质。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。