查询词典 variance

While changes to the scoring rubric were primarily based on rater feedback, and were tested in pilot studies, there is still a need to collect new evidence to support the use of the PN exercise and to ensure that potential sources of irrelevant variance are not compromising test score interpretations.

虽然评分标准的变动主要地基于评级员的反馈，并在前期研究中经过了测试，但仍需要收集新的证据，以支持PN练习的使用并确保不相干差异的潜在来源不会牺牲对测试分数的解释。

Analytical variance of the estimation declines linearly by increasing the bit signal-to-noise ratio for the proposed channel estimator.

理论分析结果表明，该算法的对数估计方差随比特信噪比的增加而线性减小。

We give the approximation formulas of the variance of the sample ratio estimator for a population mean and its asymptotically non-biased estimator in multi-stage sampling.

讨论多阶段抽样比率估计及其样本量选择的问题，给出了比率估计抽样均方误差的近似公式及其渐近无偏估计的公式。

Multicollinearity ; condition index ; variance decomposition proportion ; signal-to-noise ratio ; partial ridge estimator

复共线性；条件指标；方差分解比；信噪比；部分岭估计

The method of analysis of variance was used to analyse germination characteristic of plant cane and ratoon cane in 163 sugarcane varieties of 10 series from PR, CP, H, Q, CO, M,B, Taiwan, Japan, and Philippine.

采用方差分析和相关分析的方法对PR、CP、H、Q、CO、M、B、台湾、日本和菲律宾10个系列163个甘蔗品种的新植和宿根萌芽特性进行分析。

Yield and quality characters from two plant crops and one ratoon crop of fourteen sugarcane varieties were investigated by factor and clustering analysis. The eleven indexes were divided into four common factors by factor analysis and cumulative variance contribution of the four factors reached 91.08%.

对14个甘蔗品种2次新植和1次宿根的产量及品质性状进行因子分析和聚类分析，因子分析将11个甘蔗经济性状用4个主因子表示，累加方差贡献率达到91.08%。

Methods We enrolled 551 vitiligo patients with psychological problems from total 7443 patients with vitiligo after investigating sexuality, profession, area of lesions, distribution, reactiveness and typing by filling out the epidemiological questionnaire, and then we analyzed the correlation of psychological problems and clinical manifestations. Statistical analyses were performed using SPSS-13.0 software, and the data were analyzed by Chi-square test and variance analysis.

采用统一制定的流行病学调查表，调查员对白癜风患者进行面对面同等细致询问，就其性别、职业、皮损面积、单双侧分布、皮损的活动性及分型等情况进行调查，并让患者自身评价其心理状况，从7 443例患者中筛选出551例自觉有心理问题的患者，分析上述临床资料与心理问题的相关性。

The summer variance between the NCEP reanalyze sensible heat flux and the sensible heat flux calculated by the data of weather station is basely consistent.

NCEP地面感热资料与根据地面站资料计算的地面感热在夏季的变化是基本一致的。

They are the effect of category variance, the heterogeneous representation in categorization, and the recency effect.

这三类现象分别是类别变异效果、异质性类别表徵、与接近效果。

When the Hamming distance was uncertain of its decision due to the influence of eyelids, eyelashes and iris deformations, mean and variance were extracted from coefficients of multiwavelets transform, and Euclidean distance of covariance reciprocal with weight value was designed as the classifier.

对因为睫毛、眼睑、虹膜变形等影响而不能有效识别的虹膜图像，再对多小波变换系数提取均值和方差作为全局特征，用方差倒数加权欧氏距离进行识别。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。