查询词典 null

In single-side hypothesis testing,the exchange of the null hypothesis and alternative hypothesis would induce two different testing results sometimes.

在单侧检验中，有时由于交换原假设与备择假设，会得到两个不同的假设检验结果。

Whenever we reject the null hypothesis, the conclusion we do accept is called the alternative hypothesis

无论何时，拒绝无效假设时，我们所接受的结论叫做备择假设。这本书的最后是概要和结论。

In this paper, we illustrated some statistical issues of confirming efficacy in clinical trials, including its conditions, the determination of clinical margin, the forms of the null and alternative hypothesis and confidence intervals, the choice of endpoints and some miscellaneous considerations.

本文从统计学角度阐明了以安慰剂作为对照和以阳性药物作为对照的3种临床试验确认疗效的条件、确认疗效的界值制定、确认疗效的假设检验方法、确认疗效的可信区间方法、以及确认疗效的指标选择等方面需要注意的问题。

Paired t- tests were performed to investigate the significance of these differences between the SSG and the CIST, where the null hypothesis in each test was that the mean COVs were equal and the alternative hypothesis was that they were not equal.

成对t 检查则调查的意义，这些分歧的特殊保障和中科院，那里虚无假设在每次测试的是平均covs都是平等和替代假设是，他们不是平等的。

Relationship between null and alternative hypothesis; Level of significance; typical steps of hypothesis test, two type errors, critical values.

教学目的：通过学习领会统计假设测验即统计推断的原理及其基本步骤，统计假设测验的两类错误及其关系。

Hypothesis testing entails using data to compare the null hypothesis with a second hypothesis, i.e., the alternative hypothesis.

假设检验利用数据将零假设和另一个假设进行比较。

Grillo C%D′Ambrosio C%Scaloni A Cooperative activity of Ref-1/APE and ERp57 in reductive activation of transcription factors Free Radical Biology and Medicine , 2006,null

JIANG Zhen-dong%姜振东%张学渊%魏运军%袁伟%卓贤露 APE/Ref1在H2O2诱导耳蜗螺旋神经节细胞氧化损伤过程中的表达第三军医大学学报， 2007，5

American Public Health Association Standard Methods for the Examination of Water and Waste Water(15th Edition) New York:APHA , 1980,null

中国国家技术监督局%国家环保局 GB/T 12990-1991。水质-微型生物群落监测-PFU法北京：中国标准出版社， 1992，null

We calculate the field distribution near focus of an aplanatic system for incident ASPBs with different polarization orders and initial azimuthal angles, and based on the simulation results, we find some unique focusing properties of the beams, such as ever on-axis energy null, strong longitudinal field, and flowerlike intensity distribution at focus.

计算了不同偏振级次和偏振初始角的轴对称偏振光束当入射到无球差系统时在焦点附近的场分布，通过这些模拟结果，发现了该光束一些独特的聚焦特性，例如光轴强度始终为零、具有较强的轴向光场以及在焦点附近场呈现花瓣状分布等。

If it is NULL, the dialog object's parent window is set to the main application window.

如果这个参数为空，对话框对象的父窗口被设置到应用程序主窗口。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。