Variance是什么意思 Variance在线中文翻译

variance 英 [ˈveəriəns] 美 [ˈveriəns]

variance 词典解释

1. We have never been at variance with our neighbors.
   我们从未和邻居发生过龃龉。

1. 方差
   ...16 方差(variance)是一组数据中各变量与其均值离差平方的平均数,方差的算术平方根叫标准差(standard deviation). 方差与标准差是反映数值型数据离散程度的主要的也是常用的方法,是描述数据分布特征的重要的统计量....
2. 变异数
   ...心率变异性分析则是通过测量连续正常的QRS波群周期之间的变化(beat to fluctuation)变异数(Variance),从而反应心率的变化. 它不同于常用的以时间为单位的平均心率变化指标(如最大心率或最小心率等),HRV的大小并不反映心率的快慢....
3. 差异
   ...除此之外,Breiman [Bre96a] 还从偏向(bias)和差异(variance)的角度对泛化误差进行了分析. 他指出,不稳定预测函数的偏向较小、差异较大,Bagging正是通过减小差异来减小泛化误差的. 在此之后,...

1. an activity that varies from a norm or standard
   e.g. any variation in his routine was immediately reported
   Synonym: variation
2. an official dispensation to act contrary to a rule or regulation (typically a building regulation)
   e.g. a zoning variance
3. the quality of being subject to variation
   Synonym: variability variableness
4. a difference between conflicting facts or claims or opinions
   e.g. a growing divergence of opinion
   Synonym: discrepancy disagreement divergence
5. the second moment around the mean
   the expected value of the square of the deviations of a random variable from its mean value
6. discord that splits a group
   Synonym: division
7. an event that departs from expectations
   Synonym: discrepancy variant

variance 词组短语

1. at variance with 与...有分歧
2. at variance 有分歧, 不和
3. set at variance 使不和

variance [ˈveəriəns]