正态

唐氏综合征筛查指标MOM值的正态性研究

Study on normality of MOM of screening indexes for the down 's syndrome

综合最近邻法和最小二乘法，定义了β、g和σ2的估计量，在适当的条件下证明了σ2的估计量的渐进正态性。

As a result , the asymptotic normality of σ 2 is obtained under some suitable conditions .

关于非正态总体的工序能力指数Cp值计算的研究

Research on computing the value of the work procedure ability index C_p

F的正态分布特性则由模拟随机数据的研究加以证实。

The normal distribution characteristics of F is checked with the aid of a simulation study .

基于正态假设，提出了测量误差模型lackoffit检验的一种方法。

Based on the normal assumptions , another method for lack of fit tests for linear errors in variables model is proposed .

DCT域盲嵌入的正态实数伪随机序列水印方案探讨

A Blind Watermark Scheme which Embeds a Random Sequence in DCT Domain

正态AR（1）模型参数的极大似然估计的解析解及其讨论

Notice about analytic solution of maximum likelihood estimate in normal ar ( 1 ) model

结果：郑州市汉族健康人群与DMCAD患者血清ArE/PON1活性频数均呈单峰正态分布；

Results : Serum ArE / PON1 activity distributions in healthy group and DM-CAD group were all normal distribution .

这一极限分布在中心是对数正态的，但有两个巴利多（Pareto）分布的尾。

This limiting distribution is lognormal in the center and has Pareto tails .

没有基变换时的指数分布和标准正态分布的k值均小于0.5，它们对随机参量的逻辑值呈偏小估计。

And k is smaller than 0.5 for exponential distributions and normal distributions without radix conversion , which means the smaller logic values of random parameters .

方法用正态分布小样本容量的简化检验（A法）和方差检验（B法）来判定两种测定方法所得结果的异同。

Methods The simplified test of normal distribution ( method A ) and analysis of variance ( method B ) were adopted to judge if the two testing methods have variation .

利用Excel可以实现对化探数据多种项目的处理，如正态性检验；

A variety of geochemical exploration data can be processed in the Microsoft Excel , such as : test of normality ;

利用对数正态分布图获得了Pb、Cu、Zn、V、Se和Ti等元素的地球化学背景值。

The geochemical background levels are obtained by applying lognormal distribution plots to Pb , Cu , Zn , V , Se and Ti .

本文对Poisson分布数据作正态近似分析时所需样本含量的决定，作一些探索和讨论。

This paper contributes to probing and discussing on the determination of sample size in statistical analysis for Poisson data .

由正态分布W检验统计量的思想出发，给出了用于检验Pareto分布的R~2检验统计量。

According to the thought of W testing statistics for Normal Distribution , we deduce a R2 testing statistics for Pareto Distribution .

DH群体各性状变异丰富，大部分表现出明显的超亲分离，同时表现为正态分布。

Most traits in DH population showed transgressive segregation and demonstrated the normal distribution . 5 .

学生化Kaplan－Meier估计的正态逼近速度

The rate of normal approximation for Studentized Kaplan-Meier estimator

此外，还建立对数寿命标准差和Weibull分布形状参数之间的关系式，从而能够根据工程上积累的大量对数正态分布标准差上限的数据求得Weibull分布形状参数下限，反之亦然。

A relational expression between the standard deviation of logarithmic life and the shape parameter of Weibull distribution is also established .

第三章对VAR模型的计算方法进行了改进，重点介绍了随机搜索化的德尔塔正态方法和蒙特卡罗模拟法的改进；

Chapter 3 improves the calculating method of VAR model . It introduces importantly the random searching delta-normal method and the improvement the Monte Carlo simulation method .

林分直径分布，幼龄林呈倒“J”型，壮龄林近似于正态分布；

The stand diameter distribution of juvenile stand appears an inversed " J " form , and that of the half mature forest approximately a normal distribution .

方法应用基于分析结果正态分布的z-值（z-score）质量控制评价方法对全国25个保健食品功能成分检测实验室的钙分析质量进行评价。

Methods Quality control method of z-score based on normal distribution was employed .

因此，只有用正态混合分布假设下的GARCH模型才可以较好地解释上证指数的波动性。

GARCH model is used on the basis of the hypothesis of mixed normal distribution to analyze the Shanghai-securities index volatility .

当误差服从正态分布时，稳健估计方法与OLS基本一样好。

When the errors follow a normal distribution , the robust estimation method is essentially as good as OLS .

本文将EM算法用于随机右删失数据下指数分布、Weibull分布和对数正态分布的参数估计中。

In this paper , EM algorithm is used to estimate the parameters of exponential distribution , Weibull distribution and lognormal distribution based on randomly right censored data .

从255个双单倍体株系抗旱鉴定结果看，该群体表型呈单峰连续分布，符合正态分布，表明叶片卷曲度在DH群体中呈现数量遗传的性状。

The result indicates that the leaf rolling presents quantative genetic character in the DH population because the phenotype distribution accords with normal school .

设X是一个服从标准正态分布的随机变量，即X～N（0,1），本文给出两类非线性函数f（x），使得f（X）仍然服从标准正态分布。

Let X be a standard normal random variable . This paper gives two classes of nonlinear functions f ( x ) with the properties that f ( X ) is also a normally distributed random variable .

对于车辆零部件在随机变量服从正态分布和非正态分布时，利用JC法求出可靠度。

The reliability of vehicle components is obtained by using JC method when basic random variables are normal distribution or non-normal distribution .

正态样本异常值Nair检验统计量的近似分布

The approximate distribution of Nair test statistics of detecting Outlier for normal sample

通过模型的比较分析，得到基于稳定分布的ARCH类模型比基于正态分布、t分布的ARCH类模型能更好地刻划金融时间序列的特征。

It is found from the comparison that the ARCH type models with stable Paretian innovation is more capable to capture characteristics of financial time series than ARCH type models with normal and student 's t innovations .

结果青年军人BHR的分布不符合正态分布规律。

Results BHR of youths in military service didn 't coincided with normal distribution .