By means of the analytic expression of the two-frequency and two-position mutual coherence function, the average arrival time of signals passing through ionosphere can be calculated precisely. 利用双频、双点互相干函数的解析解能够较精确地算出卫星脉冲信号平均到达时间。
The average accumulation cost is positively proportional to the number of container in a BCT and the sum of arrival containers in the period of time concerned, and linearly correlated to the expectation value of the number of arrival containers. 班列的平均集结消耗与该方向班列的编成箱数和一定时期内总的到达箱数成正比,并且与到达箱数的期望值线性相关。