variance of population中文是什么意思

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中文翻译
造句

总体方差

variance n. 1.变化，变动，变更；变度，变量；【统计】(平)方 ...
population n. 1.人口；人口总数；全体居民；人口的聚居。 2.物 ...
population variance 母体方差; 已知; 总方差; 总离散; 总偏差; 总体方差
estimation of population variance 总体方差估计
unbiased estimate of population variance 均方；总体变异无偏估计; 无偏总体方差
at variance 有分歧, 不和
at variance with 与...有分歧, 与...不和, 与...不符
variance n. 1.变化，变动，变更；变度，变量；【统计】(平)方(偏)差。 2.(意见等的)相异；不和，冲突，争论。 3.【法律】诉状和供词的不符。 at variance with 和…不和；和…不符 (at variance with the facts 不符事实。His conduct is at variance with his words. 他言行不符)。 set at variance 使不睦，离间。
variance with 和不和
population n. 1.人口；人口总数；全体居民；人口的聚居。 2.物的全体[总数]；【生物学】虫口；种群(量)；群体；族，组，个数；【统计学】对象总体，全域。 3.【物理学】布居；密度。 4.〔罕用语〕殖民。 varietal populations 品种群体。
combined variance(or poolled variance) 合并方差
physical variance，efficiency variance 实绩差异，效率差异
spending variance,expenditure variance 开支差异
transient population, vagrant population 流动人口
activity variance 业务活动差异; 业务活动量差异; 作业差异
adaptor variance 加性方差
additive variance 加性方差
additivity of variance 方差加和性
adverse variance 不利差异,逆差
allan variance 阿伦方差
analysis of variance 变差分析; 变分析; 变异数分析; 方差分析法; 分析方差; 离散分析; 偏差分析
analytic variance 分析方差
angular variance 角方差
asymptotic variance 渐近方差
average variance 平均方差

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例句与用法

The present methods for testing the large - scale corpus segmentation have the following faults : a . it is difficult to exactly estimating the variance of population ; b . the sampling quantity is too large to test the corpus segmentation . to solve the given problems , we put forward the testing method based on clustering , which sorts the sample of corpus into many group by clustering them
语料库分词质量的评价问题是汉语语料库的特有问题，已有的简单随机抽样的方法，当语料库规模变大时，无法精确估计分词质量评价中语料库样本的总体方差，同时，为了保证检验的精度，传统抽样方法的检验费用太高。
The following merits can gain by using the clustering method : a . the sampling quantity can be reduced by using the method to test the segmentation of the large - scale corpus ; b . the testing precision can be improved and the variance of population can be estimated more exactly
与已有的简单随机抽样方法相比，本文提出的方法在大规模语料库分词质量评价时，有如下优点； a通过聚类得到语料库抽样样本分词正确率的分层知识，进而在检验中运用分层抽样带来的增益减少检验的费用： b

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Last modified time:Sun, 17 Aug 2025 00:29:56 GMT