查询词典 chi square distribution

They also show that the DSUR estimators have asymptotically mixed normal distribution and the tests of parametric restrictions can be constructed by the Wald statistic which is asymptotically distributed as a chi-square variate.

如Mark et al(2005)等提出了似无关动态协整模型的思想及其估计方法，以此来消除解释变量的内生性影响，并获得了一个标准的渐近分布。

Results Family aggregation of MS was found by chi-square test for fitness according to binomial distribution and beta binomial distribution.

结果 用二项分布和β-二项分布进行拟合优度的χ^2检验，发现MS的患病情况存在家庭聚集现象。

The LM statistic follows chi square distribution with q degrees of freedom under the null.

LM统计量在零假设下服从 q个自由度的卡方分布。为什么乘上n-q而不是n？

A new method is proposed to apply generalized chi square distribution to describe the asymmetrical distributions of noise correlation,and using generalized Gaussian distribution to describe the symmetrical distributions of noise correlation.

实验结果表明，该方法与仅采用一个广义高斯分布的方法相比，可以使鉴别错误率降低38%以上，可见利用不同的概率密度函数来描述相应的分布是减小鉴别错误率的一个有效途径。

In order to improve the validity of identifi cation of digital image origin and predetermine accurately threshold of identification,a new probability density function of generalized chi square distribution is constructed within0,1 for asymmetrical distribution of noise correlation.

为了提高鉴别数字图像来源的正确性，正确设置判别阈值，针对噪声相关性的非对称分布，在0，1区间构造了一个广义chi平方分布的新函数，并提出了一种利用广义chi平方分布来描述噪声相关性的非对称分布和利用广义高斯分布来描述噪声相关性的对称分布的新方法。

In this paper, we use Chi-square distribution instead of Gaussian distribution as the model of ASE noise.

本文提出用x平方律分布模型代替高斯信道模型，并将高性能的不规则重复累积码应用于远程光纤通信系统。

The results showed that the larvae in all orchards were in aggregation distribution pattern and fitted for negative binomial distribution tested by chi-square, which was due to the life habit of the larvae and environmental factors.

结果表明：桃蛀螟幼虫种群在板栗园中全部呈聚集分布，而且均符合负二项分布，其聚集原因是由该虫习性与环境因素共同造成的。

I have calculated the species diversity for 3 layers (i.e. tree layer, shrub layer and herb layer) by means of various biodiversity index formulas and analyzed the relative species abundance using 9 models of the probability density distribution functions, such as, 3 Distribution (or Beta Distribution, Weibull Distribution, Lognormal Distribution, Poisson Distribution, Binomial Distribution, Negative Binomial Distribution ,Geometric Distribution, etc.. chi-square analyses were conducted on species distribution by using the chi-square test formulated by Pearson to test which distribution function is better, the result of chi square test made it possible to reject the other 8 distribution functions, theβdistribution function performs better than other probability density functions, it has a very close approximation, which can be used for the description of relative abundances of species in forest communities in this data set.

在相对多度研究上选用了九种概率分布模型，这九种概率密度分布函数依次为：贝塔分布、Weibull分布、对数正态分布、泊松分布、二项分布、负二项分布、几何分布、对数分布和奈曼A型分布，并进行了严格的卡方检验，结果表明：其它八种分布均被遭到拒绝，只有贝塔分布获得了通过，且拟合的结果非常理想。

This course includes descriptive statistics, probability distribution, sampling distribution, statistical estimation, hypothesis testing, analysis of variance, chi-square tests, simple linear regression, multiple regression, and nonparametric statistics.

本课程内容包括叙述统计、机率分配、抽样分配、统计估计、统计假设检定、变异数分析、卡方检定、简单线性廻归、复廻归、无母数统计。

It is indicated that: 1 at evidence level of 0.01, the chaffs dynamic RCS presents chi-square distribution at S-band and X-band; 2 the density of chaff cloud would decrease with time, which will result in lower RCS; and 3 with increasing of frequency and decreasing of wavelength, the coherence effect between different chaffs would get less, which will result in weaker fluctuation.

结果表明，当显著性水平为0.01时，该箔条云在S波段和X波段的动态RCS服从χ^2分布；箔条云形成之后，箔条密度随着时间的推移而下降，导致其RCS减小；随着频率升高而波长减小，箔条间互耦效应将减小，箔条云RCS的起伏也将减小。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。