Digital correlation approach is used to find the time of flight (tof) in ultrasonic distance measurement.
采用数字相关的方法确定超声波测距中的渡越时间。
Using this method you can generate a lot of records, yet this approach is somewhat simplistic, since all the values are distributed evenly and there is no correlation between them.
您可以使用该方法来生成大量记录,然而,该方法有点过分简单了,因为所有的值都是均匀分布的,而且它们之间不存在相关性。
This situation is called correlation between the MAKE and MODEL columns. The correct approach is to specify valid pairs (MAKE, MODEL) and their frequencies.
该状况称作make列和model列之间的相关性。
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