cross covariance造句

"cross covariance"是什麽意思   

例句與造句

  1. By making use of the time dependent covariance and cross covariance formula which used to calculate the non - stationary response under earthquake random excitation and deduced by xiyuan zhou and hu in 1965 , the covariance and cross covariance formula of the four envelope models was deducted and the result of four models compared
    本文通過應用周錫元、胡聿賢在1965年提出的計算地震動隨機激勵作用下非平穩響應的時變自相關方差和時變互相關方差公式,分別推導了四種包線函數模型的時變自相關方差和時變互相關方差表達式,并比較了四個模型的結果。
  2. It's difficult to find cross covariance in a sentence. 用cross covariance造句挺難的

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