variance distribution

Empirical analysis of hypothesis of market efficiency always is tested by random walk, coefficiency and ARCH class models. ARCH class models can expose conditional time varying variance, clustering and fat tail of distribution of high frequency financial time series.

资本市场有效性假说的实证分析主要有随机游走检验、相关性检验和ARCH类模型检验，而ARCH类模型较好地揭示高频金融时间序列的条件方差时变性、波动集束和宽尾分布现象。

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Unlike the traditional method, we directly estimate E and the regression parameters without involving the variance function, the link function, the transformation function and the error distribution function, as a result, the efficiency of the estimators will be improved.

更重要的是本文用一个非常简单的方法估计感兴趣的参数，估计过程中不涉及未知的转换函数、联系函数、方差函数及误差分布函数，因此估计的有效性将被极大提高。

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The maximum likelihood estimate and uniformly minimal variance unbiased estimate ( UMVUE) of MTTF were made on the one-unit system whose lifetime was assumed to be on GAMMA distribution.

讨论寿命服从单参数GAMMA分布单元平均寿命的极大似然估计和一致最小方差无偏估计；

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Space distribution, transformation tendency, anisotropic direction magnitude and auto correlation distance are displayed by GIS software and it has been proved that space variance and anisotropy exist in soil moisture content.

在GIS上直观的显示出区域内土壤体积含水率的空间分布、变化趋势、各向异性的方向和大小、自相关距离，证实土壤墒情存在着空间变异和各向异性。

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The error is related to the two rank partial derivative of the flux function to each factor and the mean variance distribution of each factor on each grid point.

误差食与该通食函数对各要紊的二阶偏导数和各要紊在网格夕乙侧匕的轰全布的均方差有关。

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The expectation and variance of LAR formula is given by inference under normal distribution.

推导出了正态分布下大额赎回量的期望和方差计算公式。

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This paper has analysed the magnetic field distribution in YCT under noload and the influence of different armature reactions, and especially, the main flux variance with armature reaction. We provide the foundation to unify the design for engineering.

本文分析了YCT电机空载和在不同电枢反应影响下磁场分布情况，尤其是分析了主磁通分布和受电枢反应影响的变化情况，为在工程上统一设计方法奠定了基础。

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