标准差

计算每组样本的均值±标准差（x±s），进行成组设计材料的t检验。

Mean and standard deviation ( x ± s ) were calculated .

计量资料用均数±标准差（x±s）表示。

Measurement data is expressed in mean differences ± standard deviation ( x ± s ) .

论分组误差与标准差公式的修正问题&介绍一个新的修正公式σc

Grouping Errors and the Revision of the Formula of Standard Deviation

Fuzzy环境中变异度指标的标准差计算

Calculation of Standard Deviation of Dispersion in Fuzzy Environment

文中提出了基于自适应标准差的Web股市信息强度变化挖掘方法，并使用股市数据进行了验证。

An adaptive mean-std method for judging the change of stock information intensity , is presented and it is validated by using the market data .

一种基于相对标准差的SAR图像Speckle滤波方法

An Adaptive Method for Speckle Filtering of SAR Image Based on Local Relative Standard Deviation

该法对水样6次平行测定Cu和Cd的相对标准差分别为4.3%及11%，加标回收率为84.4%～118%。

The relative standard deviation of 6 parallel determinations was 4.3 % for copper and 11 % for cadmium .

已二酰肼残余量测定平均相对标准差为2.2%，重复性精密度小于0.01μg。

The results showed that RSD and ADH 's residue detection was 2.2 % and the precision of reproducibility was less than 0.01 μ g.

统计学方法：所有统计数据均为计量资料，以均数±标准差（x±s）表示。

Statistical Methods : All statistical data are measurement data , and to be expressed as mean ± standard deviation ( x ± s ) .

由平均风速和其标准差估算Weibull参数的近似公式及其精度

Formulas and their accuracy for estimating the Weibull parameters by average wind speed and standard deviation

统计学处理包括均数±标准差、方差分析、q检验、t检验、秩和检验、直线相关分析。

The statistic methods contained mean standard deviation , ANOVA , ttest , q test , rank test and analysis of linear correlation .

同时将BP网络累积预测误差标准差作为自适应遗传算法的适应度函数，并作为遗传终止的判定准则之一。

Meanwhile , AGA fitness function is defined as the standard deviation of BP network 's accumulation forecast errors and also one of genetic termination criteria .

分别利用此两类测试信息及K故障诊断法和最小标准差法，对电路进行初步诊断，再运用模糊变换及故障定位规则，得到融合的故障诊断结果。

The preliminary diagnosis results are presented by fault attaching values of components . And fusion diagnosis is performed based on fuzzy transformation and fault location rules .

各组数据均以均数±标准差（x±s）表示，做单因素方差分析及各组间的两两比较。

All data be expressed by mean ± standard deviation ( x ± s ) , and be treatment by one-way ANOVA and compare between every group .

目前GPS静态定位水平精度较高程精度高，高程分量标准差平均约为水平分量的三倍。

At present , the GPS static positioning accuracy of horizontal is better then vertical . Average , vertical standard bias is3 times for horizontal standard bias .

引进能量、Shannon熵和标准差STD作为特征量对气固两相流频域空间进行分析。

Energy , Shannon entropy and standard deviation were applied to characterize gas-solid two-phase flow in frequency space .

统计指标均进行正态性及方差齐性检验，计量资料以均数士标准差（x±s）表示，计数资料用数值及百分比表示。

Statistical indicators for normality and homogeneity of variance test , measurement data to the mean ± standard deviation ( x ± s ) and expressed as a percentage .

此外，还建立对数寿命标准差和Weibull分布形状参数之间的关系式，从而能够根据工程上积累的大量对数正态分布标准差上限的数据求得Weibull分布形状参数下限，反之亦然。

A relational expression between the standard deviation of logarithmic life and the shape parameter of Weibull distribution is also established .

在此基础上，分别给出了基于非对称Laplace分布标准差和VaR值的修正的Sharpe指数；

Based on the standard deviation and VaR of asymmetric Laplace distribution , a modified Sharpe index is proposed .

论述采用合并样本标准差和B类不确定度评定方法计算重复性引起的不确定度，使可以在符合检定规将规定的较少测量次数中得到比较可靠的标准不确定度。

Using the method of merging sample standard deviation and evaluating indeterminacy of category B to calculate the indeterminacy aroused by repetitiveness can obtain reliable standard indeterminacy in much less time tallied with the inspection procedure .

各组数据应用均数土标准差表示（X±S），应用自身对照比较的t检验进行统计学处理，P＜0.05为差异显著。

Variables were expressed as mean + standard deviation ( x + s ) and self-antitheses t tests were done to evaluate differences , p value of less 0 . 05 was required for significance .

一个J曲线动力学模型每个投资者都拥有一条无差异曲线来表示他对于预期回报率和标准差的偏好。

A DYNAMIC MODEL THAT CAN SHOW " J " EFFECT Every investor has a family of indifference curves to represent his preferences for risk and return .

观察各组间vWF、Ps水平的表达情况，数据用均数与标准差表示，各组均数间比较用方差分析q检验，P＜0.01为有统计学意义。

Data are expressed as mean value + sem and compared with individual groups using analysis of variance ; a value of P < 0.01 was required for statistical significance .

计量资料表达为均数±标准差（x±S），组间比较用两样本的t检验，等级资料用秩和检验，计数资料用卡方检验。

Measurement data expressed as mean ± standard deviation ((?) ± S ), between the two groups using two sample t test , rank sum test using ranked data , count data using chi-square test .

采样速率为71ml／min，相对标准差为7%。

The rate of sampling was 71ml / min and relative standard deviation was 7 % .

24h每5分钟正常R-R间期平均值的标准差（SDANN）。

SDANN : Standard deviation of the average R-R intervals calculated every five minutes for 24 h.

并更深层次的采用Matlab对竹片目标区域的灰度值精确提取，进行灰度值统计分析，将阈值和灰度值的标准差比较，判断竹片的合格性。

To judge the eligibility of the bamboo , the grey value of bamboo in the target area is extracted precisely , and threshold and standard deviation of grey value is analyzed and compared through Matlab .

方法：72例腰椎（L2～4）骨矿密度（BMD）低于本地区20～40岁健康女性均值减1.0标准差的绝经后妇女，双盲随机分为两组各36例。

Method : Seventy-two postmenopausal women with L2-4 BMD at least lower than subtract 1.0 standard deviation from the mean value of BMD in normal young adults .

本实验主要获得实验组与两对照组阳性目标的平均积分光密度值及各组间平均积分光密度值的标准差（x±S）并进行比较。

This experiment aims at getting the average integrated optical density from this three groups and the standard deviation ( x ± S ) of inter-group average optical density so as to make a comparison . 3 .

不过，违约模型下贷款损失的标准差要比CreditMetrics模型下的贷款价值偏离其均值的标准差要大些；

However , under the default model the standard deviation of the loss of the loan is a bit more than the one which deviates from the average value of the loan under the Credit Metrics model ;