A very useful quantity is the half-time for the reaction . 一個很有用的量是反應的半衰期。
Br > useful quantities have changed hands 較大的數量已經轉手。
Useful quantities have changed hands 較大的數量已經轉手。
Useful quantities have changed hands 較大的數量已經轉手
Abstract : in this paper ? for real marine underwater noise data by using synchronous acquisition of points ? inputs - output covariance matrix is obtained by filtering ? compensating delay and crosscorrelation . then the contribution of inputs to output in network sense and partial coherence as well as other useful quantities are calculated from the inputs - output covariance matrix 文摘:本文對多點同步測量方法記錄的艦艇噪聲數據,采取在時域上作濾波、時延補償和互相關得到輸入輸出協(xié)方差矩陣,然后從輸入輸出協(xié)方差矩陣計算在網絡意義和偏相干意義下輸入對輸出的貢獻以及其它有用的量。