variate difference造句

例句与造句

1. In the 1920s Yule wrote three influential papers on time series analysis, " On the time-correlation problem " ( 1921 ), a critique of the variate difference method, an investigation of a form of spurious correlation ( 1926 ) and " On a Method of Investigating Periodicities in Disturbed Series, with Special Reference to Wolfer's Sunspot Numbers " ( 1927 ), which used an autoregressive model to model the sunspot time series instead of the established periodogram method of Schuster.
2. It's difficult to find variate difference in a sentence. 用variate difference造句挺难的