variance of population中文什么意思

下載手機詞典可隨時隨地查詞查翻譯

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
語料庫分詞質(zhì)量的評價問題是漢語語料庫的特有問題，已有的簡單隨機抽樣的方法，當語料庫規(guī)模變大時，無法精確估計分詞質(zhì)量評價中語料庫樣本的總體方差，同時，為了保證檢驗的精度，傳統(tǒng)抽樣方法的檢驗費用太高。
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
與已有的簡單隨機抽樣方法相比，本文提出的方法在大規(guī)模語料庫分詞質(zhì)量評價時，有如下優(yōu)點； a通過聚類得到語料庫抽樣樣本分詞正確率的分層知識，進而在檢驗中運用分層抽樣帶來的增益減少檢驗的費用： b

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