查询词典 standard deviation

Then we study investors\' behavour in China by using the questionnaire method from three dimensions—investor\'s knowledge,psychology and behavior and from seven affecting factors—motive,securities investment Knowledge,awareness of risk,investment philosophy,trading,investment decision-making rule and investment performance.Aiming at these investment characteristics we examines the conservative bias and the reasons for the deviation from mental deviation from the emotional,social psychology and cognitive psychology deviation and from over-confidence,loss aversion,conservatism aversion, excessive fear of selective bias,selecting aversion,gambling psychology,self-attribution,the dependence on the policy bias and rapid money-making psychology.And we analyze investors\' several restrictive conditions during investment decision-making including information and knowledge constraints,psychological constraints,funds constraints and external conditions.

本文从全球股灾的教训及近年来我国证券投资者生存现状出发，从理论和实践两个角度论述了加强投资者教育以提高我国投资者在投资过程中的自我保护能力的重要性；采用调查问卷的方法，从投资者的知识、心理、行为三个构面，从入市动机、证券投资知识、风险意识、投资理念、交易行为、投资决策依据及投资业绩等七个影响因素来考察了我国投资者的投资行为；针对这些投资者的行为特征，从情感心理偏差、社会心理偏差和认知心理偏差三个构面，从过度自信、损失厌恶、保守性偏差、过度恐惧、选择性偏差、赌博心理与自我归因、对政策的依赖性偏差以及暴富心理等影响因素出发对我国投资者的认知偏差，以及产生这些偏差的原因进行了分析，探讨了投资者在投资决策时的几个约束条件，即信息约束、知识约束、心理约束、资金约束以及外部条件约束。

The regression equation can describe well the change of standard deviation of relative radiation error with solar zenith angle, standard deviation of height, and resolution of digital elevation model. The result demonstrates that it is necessary to consider terrain complexity when using moderate resolution of remotely sensed data.

利用拟合方程可以计算任意地形条件下，不同分辨率的卫星资料在不同太阳天顶角情况下，不考虑地形复杂性产生的平均地表入射太阳辐射的计算误差，结果表明，使用中分辨率的卫星资料计算地表太阳净辐射时，需要考虑地形复杂性。

If a certain sample of data has a mean of 20.0 and a standard deviation of 3.0, which of the following values is more than 2.5 standard deviation from the mean?

我做的时候，是仅从题意及对standard deviation的概念的大致了解，知道这题答案一定是与20.0相差最大的那个

The method includes identifying (101) a surface in the image, and for each point in the image, calculating (102) a first curvature measure, forming (103) a set of rings of points about each point, each ring being of equal geodesic distance from a center point for the ring, calculating (104), for each ring, a standard deviation of the first curvature measure, and selecting (105) those rings with a minimum standard deviation for the first curvature measure.

该方法包括在所述图像中识别(101)表面；为该表面中的每个点计算(102)第一曲率量；为该表面中的每个点形成(103)围绕每个点的一组点环，每个环具有到该环的中心点的相等的测地距；为每个环计算(104)第一曲率量的标准偏差；以及选择(105)那些具有第一曲率量的最小标准偏差的环。

The noninformative prior of the standard deviation of error terms was introduced for Bayesian analysis. Then, given the prior density of the random coefficients in the degradation path model, the Markov Chain Monte Carlo method was adopted to generate samples of joint posterior distribution of random coefficients and unknown standard deviation.

为了处理未知的误差项方差，引入相应的标准差的无信息先验分布，并进一步结合退化轨道模型中随性参数的先验分布，利用马尔可夫链蒙特卡罗方法得到随机参数及误差项标准差的联合后验分布的采样值，进而实时预测产品在未来一段时间内的可靠度。

Because the primary source of noise in an amplifying IC is its input stage, you can assume that the standard deviation of the random component of output current of the paralleled-N voltage-to-current converters is σNI=σI×, where σI is the standard deviation of the random component of output current of a voltage-to-current converter.

由于放大器噪声的主要来源为输入端，假设N个并联电压电流转换器输出电流的随机器件标准差为σNI=σI×，σI为电压电流转换器输出电流的随机器件标准差。

Assuming all samples coming from populations with the same standard deviation σ, the accuracy of estimating σ from observations of different parts influences control limits of target control chart. The dissertation points out shortcoming of traditional standard deviation estimates and proposes a unbiased estimate of σ which results in that the variation of the estimate is minimums and the control limits is set more reliably.

假设不同工件的样本标准方差均来自于同一分布，则以不同工件的样本标准方差对母体标准方差的估计的精确性直接影响了目标控制图控制界限计算的可靠性，本文分析了目标控制图传统的两种母体方差估计方法的合理性或稳健性较差的特点，给出了一种对σ无偏估计的优良方法，从而使这一方差估计量〓的散差最小，则依此最小方差的无偏估计量所得到的控制界限更为精确，更为可靠。

As a result of error distribution\\\'s non-uniqueness, draws out to the standard deviation understanding again, by about standard deviation reflected that the erroneous zero rank value two side the variation targets, the application unimodal distribution fits the error distribution, the goal is: By approaches the rationality which under the enhancement goodness of fit\\\'s premise determines to the error.

从文章的上下文感觉此标准值似乎是人为规定的，并不受实测数据本身分布的影响，不具有客观性。个人认为：研究在实际中实测数据相对于均值的分布更有意义。按照作者的观点，误差的分布都是单峰的，除了正态分布这种对称分布外，作者认为还有不对称的偏峰分布。因此研究这种偏峰分布模型可能更有意义。

The standard deviation of 0.246(n=10),relative standard deviation of 2.56%,and recovery ratio of 93.00%-110.0% were obtained. This result is satisfactory for determination trace Crin environment water samples.

测试结果表明，本方法标准偏差为0.246（n=10），相对标准偏差为2.56%；标准加入回收率为93.00%～110.00%，能满足环境水样中Cr的检测要求。

This normalizes the standard deviation across the range of values and is appropriate providing there is a correlation between the mean and standard deviation for results from each patient treatment.

这种方法既规范化了数据列的标准偏差，也恰当的提供了每一种不同的病人治疗方法所得到的结果的标准偏差和试验方法之间的相关性。

Now he worked in ajoint venture.

现在他在一家合资企业工作。

More troops in Afghanistan won't change any of the foregoing.

更多的在阿富汗的军队也不会改变之前的状况。