查询词典 sampling distribution

To address the problem that the distribution feature of time series could not always be easily described due to its diversity, the likelihood function based on the asymmetric Laplace distribution was employed irrespective of the original distribution of the data.

针对时间序列分布特征多样性的问题，不考虑序列本身的分布特征而选择非对称Laplace分布的似然函数对模型进行贝叶斯分位回归分析。

And the evaluation effects of China's Stock Market's volatility by different ARCH models from different point of view are compared. In addition, by using two mixed distribution models, the leptokurtosis and fat-tail of stock return are examined. Based on the above analysis, an improved Laplace distribution model is proposed. Furthermore, the root generating non-Gaussian return distribution of the stock market ? is expounded from the perspective of both economy and capital market.

首先分别从分布和波动性模型出发，研究中国股票市场收益分布特征与波动性特征：从ARCH族模型出发，考察了中国股票市场波动性的异方差、集群性、杠杆效应以及长记忆性特征；从两个混合分布模型出发，结合随机模拟考察了收益分布的尖峰、厚尾和偏态特征，并提出了改进型LapJace分布。

After the review of the previous studies on the models of sky luminance distribution, it is the first that this thesis make the systematic study of the pseud-overcast sky luminance distribution by two characteristics of the maximum sky luminanace element and the luminance lapse rate with that the all of sky luminance distribution is determined. Through discussed, these methods and results on pseud-overcast sky study are suggested to be valid of the standardization of intermediate skies in this thesis.

在较为系统地分析了前人有关天空亮度分布模型的基础上，首次利用天空最大亮度元和亮度变化率二个确定天空亮度分布的特征量，对构成中间天空（除CIE全阴天空和CIE全晴天空以外的一切真实天空）之必要部分的似阴天空进行了系统的研究，从而为中间天空的标准化提供了有意义的方法和结果。

Using a variety of statistical methods tested what rate of assets return are not subject to the normal distribution assumption, but leptokurtic distribution, and week data is closer to the normal distribution than daily data.

采用多种统计方法检验了资产收益率并不服从正态分布假设，而是尖峰厚尾分布，且周收益率要比日收益率更接近正态分布。

Crowding degrees and spatial distribution patterns of Lepus capensis differed in different sample plots, the spatial distribution pattern appeared a state of even distribution that the basic composition was individual.

草兔在不同样方中具有不同的聚集度和空间格局，但均是以个体为基本成分的均匀分布。

As the stand status limit distribution is normal distribution, Weibull distribution model was built.

在林分状态结构的极限分布是在正态分布条件下，建立林分状态动态结构的Weibull分布模型。

In Chapter 7,we study thelimiting distribution of the residual lifetime of discrete-time Markovian repairablesystem,and we prove that the limiting distribution of the residual lifetime ofdiscrete-time Markovian repairable system is geometric distribution.

在第七章中，我们研究了离散时间情况下的马氏可修系统的这一性质，得到了与[50]相应的结论，证明了：离散时间马氏可修系统剩余寿命的极限分布为几何分布。

This paper discusses the equivalent normal distribution of logarithmic normal distribution and weibull distribution.

本文着重研讨了对数正态分布和威布尔分布的等效正态分布。

It has been found that the depth of crack and fracture toughness of material can be expressed by weibull distribution, ratio of depth to length of crack and strength of material can be expressed by logarithmic normal distribution and normal distribution respectively.

对该管道主要随机变量的统计分析表明，裂纹深度和材料的断裂韧性表现为威布尔分布，裂纹深长比表现为对数正态分布，材料的屈服强度和拉伸强度表现为正态分布。

When the flow of the river and the capability of the river diversion follow normal distribution or logarithmic Normal distribution or Pearson—Ⅲ distribution, the point estimation and the one order or two order approximately interval estimation of the risk probability of the criteria of river diversion are given.

并根据河道来流量和导流系统设计泄流能力分别服从正态分布、对数正态分布以及皮尔逊—Ⅲ型分布的分布形式，给出了施工导流标准风险率的点估计和一阶、二阶近似区间估计的计算公式。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。