目的 ：论述病例对照研究设计中样本大小与统计功效估计方法。
In this paper we study the size and the power of permutation test and compare them with those of other test methods under small sample size.
而当总贡献率较高时(如70%)，即使PIC值较低，较少的品种数目也可使候选基因的统计功效超过80%。
But, when the contribution was 70%, even if PIC was low, less number of varieties could make more than 80% statistical power.
该方法根据噪声时域特性将其分为结构性噪声和非结构性噪声两类，它们对统计检验功效造成的影响在文中分别进行了讨论。
The fMRI noise is classified into structured and unstructured noise by their temporal characteristics, and their impacts to efficiency of statistical tests are discussed separately.
结果：所得两种统计量与其功效函数一一匹配。
Results: the two statistics are matched with their power functions respectively.
更正一个题目所在栏“大小”的统计资讯表的功效，以消退语言包只能字母次序而不是数值。
Corrected a problem where the column "size" of the statistics table of the feature to remove language packages could only be sorted alphabetically instead of numerically.
从使用药物的性味、归经、功效、药理作用做统计，对常用中药做分析，以了解其用药规律。
Studying the property and flavor, meridian distribution, pharmacologic action and analyzing of the commonly used Chinese crude drugs, in order to comprehend the rule of Medication.
从使用药物的性味、归经、功效、药理作用做统计，对常用中药做分析，以了解其用药规律。
Studying the property and flavor, meridian distribution, pharmacologic action and analyzing of the commonly used Chinese crude drugs, in order to comprehend the rule of Medication.
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