工程上的数据一般都是具有延时Delay的特性的，在很多领域需要找到输入与输出的对应稳态的时间，采用互相关的方法可以确定出两组数据之间的最大相关性，进而确定出输入与输出的延时，经测试有效，文件中DELAY就是对应的延时，程序中已有声明。（xcorr2在matlab中代表的是自相关函数）-Data engineering are generally has the characteristics of a delay Delay, in many areas that need to find the input and output of the corresponding steady-state time, using cross-correlation method can determine the maximum correlation between the two sets of data, and to determine the delay between input and output, tested and effective, file dELAY is the corresponding delay, the program has been declared.