变量的筛选 meaning in English

screening of variables

For instance , we can use the granger causality test in econometric to help artificial neural network choose input variables , and use the principal factor analysis to help decrease the number of input variables , so that we can enhance the efficiency of artificial neural network
如可以使用时间序列中的granger因果关系检验来帮助进行输入变量的筛选，采用主因子法来减少输入变量，以提高人工神经网络的效率等。