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For these important and practical problems,sample covariance matrix is an important statistic because many important statistics are functionals of it.When we make statistical inferences,such as estimations and/or hypothesis tests,the sample covariance matrices must be investigated.

以上诸多方面在做估计和假设检验过程中,无不用到大维随机矩阵的处理,尤其是大维样本协方差矩阵的相关性质,因为多元分析中许多重要的统计量都可以表示成样本协方差矩阵的函数。

This article from will carry on the multianalysis variously and elaborates the enterprise image mold question.

这从文章将进行不同程度的多元分析和阐述了企业形象的塑造问题。

In the lower altitude of arid regions of China, with the change of landscape prairie, semi desert to desert, so were the relative distribution patterns of groups of distributional units, where hygrophilous species declined and xerophilous species increased.

基于GIS技术,以面积约为6 470 km2 的766个栅格收集我国干旱地区啮齿动物的二元分布数据,采用多元分析的分层聚类方法,依据欧氏距离平方值,将地理分布单元划分为若干个组。

Morphological differences among four shrimp groups of Litopenaeus vannamei imported from aquicultural agencies of the United States were studied with 13 morphological parameters using three multivariation analysis methods (cluster analysis, discriminant analysis, and component analysis).

中文摘要:采用3 种多元分析方法,对来源于美国的4 个凡纳滨对虾种群的13 个形态比例参数进行比较研究。

As reported in the Archives of Internal Medicine, multivariable analysis indicated hat patients with persistently uncontrolled BP were more likely to be nonadherent to medication (odds ratio =1.73) and to have had their therapy intensified (OR=1.31) relative to those with high BP that was brought under control over time.

内科文件》中报道,多元分析提示:血压持续未得到控制的患者更多的存在不持续服药( oR=1.73),并且加强药物治疗(OR=1.31与那些血压在研究过程中得到控制的高血压患者相关。

Multivariate analysis demonstrated positive associations between the incidence of device-related infection and the following factors: fever within the 24 h before implantation; the presence of a temporary pacing system at the time of implantation; and early reintervention for hematoma or lead replacement.

多元分析显示与装置相关性感染明确相关的因素包括:植入前24小时内发热,在植入时已采用临时起博装置,针对血肿以及导线置换采取早期再次干预。

Three multivariate morphometrics were used to investigate the morphological variations in 4 fish species Chinese bahaba Bahaba flavolabiata, large yellow croaker Pseudosciaena crocea, Ting's wak Wak tingi and spiny head croaker Collichthys lucidus.

运用3种多元分析方法,对黄唇鱼Bahaba flavolabiata、大黄鱼Pseudosciaena crocea、丁氏Wak tingi和棘头梅童鱼Collichthys lucidus4种鱼的21个形态性状的种间形态差异进行了定量比较研究。

The method uses radar chart of multi-statistics to show multidimensional data, from which foregone category template is upbuilt. With it, automatic classification is realized by applying fuzzy rules to recognize radar chart of unknown category and by camparing it with the template.

该方法首先采用多元分析中的雷达图表示多维数据,建立已知类模板,然后应用模糊推理方法识别未知类的雷达图形,应用模板匹配法确定其归属,从而完成自动分类。

The statistics and multiple analysis were used to suggest the diagnostic properties and diagnostic indexes for yellow brown earth and cinnamon soil in the south part of Shaanxi Provice.

利用数理统计和多元分析等方法,提出了陕南黄棕壤、黄褐土的诊断特征及诊断指标。

Faunae differing among regions as well as species richness patterns relative to environment were studied with multi-variable analysis according to species and distribution-patterns in equal-area grids.

根据等面积栅格的物种以及分布型组成,借助多元分析研究区系的区域分异,以及物种丰富度格局与环境的关系。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。