Abstract

In the area of manufacturing and industrial engineering, variance calculation is the basic method to monitor the performance of instrument. The new improved method of real-time variance calculation is put forward in this paper to calculate the variance of experiment data, despite of zero or non-zero mean value data, Then it is possible to calculate the variance of any kind data at real time without save the historical data. Experiment results shows that the new method for calculate the variance can greatly improve the calculating efficiency with high precision..

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