查询词典 sample method

R2 The adjusted R2 is 1 minus the ratio of sample variance of the OLS residuals (after correcting the degrees of freedom) to the sample variance of y.

调整过的R2是1减去OLS残差的样本方差与y的样本方差之比。

VAR calculates sample variance of the given sample.

"，"VAR 根据范例估计方差。VARP 根据全部基数计算方差。

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，提出基于方差统计的增强算法，绘制结果能够突出显示局部方差统计值较大，即结构分布较复杂的区域。

Acquired conclusion was that the sample mean value submitted to normal distribution, and the sample variance was composed of a number of linear sum of random variable submitted to Chi-Squared distr.

得出的结论是：样本均值服从正态分布，样本方差由若干个服从卡方分布的随机变量的线性之和组成；样本均值的期望等于各管落点期望的算术平均值，方差为各管方差的算术平均值；样本方差是各管落点总体平均方差的无偏估计，方差与各管落点散布的差异相关；样本均值与方差相互独立的充要条件是：各管落点属于独立同分布样本。

Generally, the background of individuality in the population is abundant. If the sampling ratio is small, the structure of sample may be different from that of population and the sample may lack representativeness.

由于一般情况下，总体中个体的背景因素差异非常大，若抽样比例较小，则会导致样本的结构与总体的结构不一致，样本缺乏代表性。

Moreover,we study the sample support of homoge-neous O-U superprocess,and prove that the sample of this process canbe supported on a Hilbert subspace of the Schwartz space of tempereddistributions.

进而，讨论时齐O-U超过程的轨道支撑，证明了该过程的轨道可支撑于Schwartz分布空间的某个Hilbert子空间（定理1.9）。

Rarely, a sample of skin scrapings or a small sample of skin will be sent to the laboratory for examination under a microscope.

很少，样本皮肤scrapings或小样本的皮肤将被送到实验室检验在显微镜下观察。

I just pressed the Depth-of-field button to make sample exposure after sample exposure until it was framed just right, then pressed the shutter release.

我只是按下景深按钮，使样品暴露后，样本曝光，直到它被诬陷恰恰好，然后按下快门释放。

This book is big sixteenmo printed and compiled in both Chinese and English with the price of RMB 380. There are 2 pictures in each page in superb bindings. Part of it is processed by UV technology could truly reappear the natural color and sense of reality of stones. It is compiled according to the proportion of 1:1 and united code all the marks, sample's name, producing area, physical character, Shore Hardness, chemical composition, lg. loss, reserves, sample supplier etc. in detailed and exact data.

图鉴》采用大十六开，中英文对照编写，定价：380元；每个页码两幅图片，装帧精美，局部采用UV技术处理，真实再现石材的天然色泽与质感；样品按照1：1比例编辑，并将全部标注统一编号、样品名称、产地、物理性能、萧氏硬度、化学成分、烧失量、矿山储藏量、样品提供商等，数据详实准确。

By synthetically analysizing the physical and chemical properties of all components and particle size, the content of F2641 in the JOB-iC is determined by gravimetric analysis after F2641 is seperated from HMX,TATB and PNP through ? alkali reflux. Determination conditions is set as follows the sample is boilingly refluxed for six hour in a constant temperature bath after adding lOOm! 8.0 ?? 0.1% NaOH. The solvent DMF saturated by TATB is used for extracting HMX,F21 and PNP from the sample and TATB is seperated by crucible filter G4. The mass precent of TATB is determined by extraction fractionation. The mass percent of PNP is measured by multiwavlength linear regression ultraviolet spectrophotometry. The testing conditions are set as follows:multiwavlength constitution: X=267nxn, 275nm, 283nm, 29mm, 299nm,the application scope of the Lambert-Beer law: the concentration of PNP is O.005?0.O25mgIml, the concentration of HMX is 0.060.3Omg/ml,absorption coefficents of PNP and HMX are solved by the slope of linear regression curve of absorbency- concentration of standard solution of PNP and HMIX for measuring wavelengthes,on the basis of the Lanibert-Beer law and absorbancy additivity principle, the slope of linear regression curve of A/E(1) and E1 of PNP and HMX solution is regarded as the concentration of PNP in the solution.

根据传爆药中各组分的物理、化学性质及主体炸药的粒度大小，进行综合分析，确定了采用碱回流重量法测定JOB-1C 中F_(2641)的含量，测定条件：加入100ml浓度为8.0±0.1％的氢氧化钠，在恒温水浴中煮沸回流6h；采用溶剂萃取法测定JOB-1C中TATB的含量，选择TATB饱和的二甲基甲酰胺为萃取溶剂，用G4坩埚式过虑器进行萃取分离；采用多波长线性回归紫外分光光度法测定JOB-1C中PNP的含量，通过实验确定了多波长组合：λ=267nm，275nm，283nm，291nm，299nm；朗波—比耳定律的适用范围为PNP浓度：0.005～0.025mg/ml，HMX浓度：0.06～0.30mg/ml；在测定波长下，对PNP、HMX标准溶液的吸光度—浓度进行线性回归，由回归曲线的斜率得出PNP、HMX的吸收系数；根据朗波—比耳定律和吸光度加和性原理，在测定波长下，对PNP、HMX 两组分混合溶液A_i/E_HMX(i与E_PNP(i/E_HMX(i进行线性回归，回归曲线的斜率即为混合溶液中PNP的浓度。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。