第三人稱復(fù)數(shù)：variances

variance基本解釋

名詞變化，變動; 不一致; 分歧; 方差

variance的解釋

variance相關(guān)詞組

1. at variance with : 與...有分歧；

2. at variance : 有分歧, 不和；

3. set at variance : 使不和；

variance相關(guān)例句

名詞

1. variance什么意思

1. We have never been at variance with our neighbors.
我們從未和鄰居發(fā)生過齟齬。

variance網(wǎng)絡(luò)解釋

1. 方差：16 方差(variance)是一組數(shù)據(jù)中各變量與其均值離差平方的平均數(shù),方差的算術(shù)平方根叫標(biāo)準(zhǔn)差(standard deviation). 方差與標(biāo)準(zhǔn)差是反映數(shù)值型數(shù)據(jù)離散程度的主要的也是常用的方法,是描述數(shù)據(jù)分布特征的重要的統(tǒng)計量.

2. 變異數(shù)：心率變異性分析則是通過測量連續(xù)正常的QRS波群周期之間的變化(beat to fluctuation)變異數(shù)(Variance),從而反應(yīng)心率的變化. 它不同于常用的以時間為單位的平均心率變化指標(biāo)(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. 差異：除此之外,Breiman [Bre96a] 還從偏向(bias)和差異(variance)的角度對泛化誤差進(jìn)行了分析. 他指出,不穩(wěn)定預(yù)測函數(shù)的偏向較小、差異較大,Bagging正是通過減小差異來減小泛化誤差的. 在此之后,

variance詞典解釋

1. （與…）不一致，相矛盾
If one thing is at variance with another, the two things seem to contradict each other.

e.g. Many of his statements were at variance with the facts...
他的說法有很多和事實不符。
e.g. This idealistic concept is at variance with reality.
這種理想主義的觀念和現(xiàn)實相矛盾。

2. 差異;不同
The variance between things is the difference between them.

e.g. ...the variances in the stock price.
股票價格的變化
e.g. ...total revenue variance.
總收入的差異

variance英英釋義

noun

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: variabilityvariableness

4. a difference between conflicting facts or claims or opinions

e.g. a growing divergence of opinion

Synonym: discrepancydisagreementdivergence

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: discrepancyvariant