Operation of discrete convolution and discretecorrelation will spend too much time to process a signal in time.
时域离散卷积和相关运算一般耗时太长，对信号进行处理的实时性较差。
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This paper develops a simple aggregate model of discrete-continuous demand to motivate how this correlation can be tested using simple regression techniques and readily available firm data.
Data correlation coefficients were calculated and switch regions were analyzed by using two dimension discrete cosine transform (DCT) in ray-space data compression.