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Firstly, normal mice was given orally by SM(qd×2d), and the dysbacteriosis were caused in them ,and then they were given orally by STM,these mice were formed experimental salmonellosis models ,finally these salmonellosis models were treated by bifidobacterium ,and count respectively the cfu/g of STM number in the mice excrement during different time of therapy,detect the index numbers of liver and spleen respectively, detect content of TNF-a in blood and in spleen respectively.

先用硫酸链霉素给正常小鼠灌胃2d,出现菌群失调症状,再用STM灌胃造成小鼠STM感染,使用两岐双岐杆菌液干预治疗STM感染小鼠,检测不同治疗时间各组小鼠粪便STM菌落数、肝脾指数、血及脾中TNF-a的含量。采用SPSS12.0统计软件包进行数据处理分析,统计学方法采用双因素重复测量资料的方分析、单因素随机化设计的方分析、卡方检验、多组均数比较的非参数秩和检验。结果:随着治疗天数的增加,STM菌落数逐渐减少,未干预组、生理盐水组及双歧杆菌组比较结果均为P<0.01;组间比较,双歧杆菌组STM数下降最快。

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矩阵的函数。

The slope estimate is the sample covariance between x and y divided by the sample variance of x.

斜率估计量等于样本中x和 y 的协方除以x的方。若x和 y 正相关则斜率为正,反之为负。

The sample covariance between each independent variable and the OSL residuals is zero.

每个自变量和OLS协残之间的样本协方为零。

Once the dispersion of the element of fluid which corresponds to the maximum on dispersion curve occurs, the increment of sample dispersion coefficient varies directly with the increment of manifold volume travelled through.

对应于流出曲线极大值的流体元一经分散,分散系数的增量与所通过的管路体积的增量成正比。根据串联釜模型,考察了响应曲线的方与各变量(反应管长,载流流速和进样体积)间的关系以及方与相应分散系数的关系。

Further, considered the considerable uncertainty of current sample variance, a reliability estimation method based on t-distribution theory and empirical logarithmic standard deviation is proposed.

进一步考虑到工程实际中当次可靠性试验的样本方具有较大不确定性的因素,提出了基于对数标准经验值的t分布可靠性评估方法。

By the comparison of the variances in the whole process of analysis (the overall variance, the sampling variance and the sample analysis variance), a new concept named Critical Sampling Mass for well mixed bulk materials was presented, and the relative equation for calculating the CSM was derived.

通过对分析全过程中各个步骤的方的统计分析,提出了临界取样量的概念和计算公式,探讨了取样的代表性问题,该项研究为客观上分析总方所能达到的水平提供了理论依据。

The existence of intraseasonal variability of SST in the whole SCS is confirmed by different statistical methods, like Singular Spectrum Analysis and Morlet Wavelet Analysis. It explains roughly 20-30% of the total sample variance .

对OISST资料进行奇异谱分析和Morlet小波变换分析的结果表明,南海全区SST存在显著的季节内变化是确定无疑的,而且是一种强信号,它的方可以达到样本总方的20-30%。

VAR calculates sample variance of the given sample.

","VAR 根据范例估计方。VARP 根据全部基数计算方

Another advantage of these improved methods is the flexibility of rendering multiple volume data sets. There is detailed analysis and experimental proof of this flexibility. Besides, since the sample variance can reflect sample value distribution, an enhancement algorithm based on variance statistic is proposed.

另外,本文根据样本距统计量能够反映样本数据值分布的特点,提出基于方统计的增强算法,绘制结果能够突出显示局部方统计值较大,即结构分布较复杂的区域。

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