一种快速的褶积、相关算法

刘彦强:一种快速的褶积、相关算法，《石油地球物理勘探》，22(5)1987:610～611 在计算机上用数学运算的方法来实现滤波，实际上是通过对输入信号与滤波因子的离散采样序列进行褶积和相关运算来实现的。常规的褶积和相关运算的计算工作量较大，尤其是当序列较长时，其计算工作量更大。

A fast algorithm for convolution and correlation

This paper expounds some points of satellite positioning network in Talimu basin,which are field date acquisition,data processing,network balancing and the accuracy of combined balancing of satellite positioning geocentric coordinate system. No. 8 coordinate system and new No. 54 coordinate system. It is shown that astrogecdetic network has a systeriatic deviation from the satellite positioning network,the scale ratio factor variation increasing northwestwards. The authors came to the conclusion: in satellite positioning in Talimu basin,geocentric coordinate system should be transformed using 7 parameter model;and the positioning accuracy may be 1-2m if the tie ranking is within 500 km and if the satellite flies over the positioning site for 25 times at least.