Optimization of Filling Material Ratio in Yellow Phosphorus Slag Mine.

Concurrently, the pile density of the mixture also shows a decreasing trend.

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The significance of the regression equation can be tested by the F-test: F = ( Q x m ) / ( Q e n − m − 1 ) When the F-value ≧ Fe(m, n − m − 1), then the regression equation is significant at the significance level α, as follows: When F ≥ F 0.01 ( m , n − m − 1 ) , the regression equation is highly significant; When F 0.01 ( m , n − m − 1 ) ≥ F ≥ F 0.05 ( m , n − m − 1 ) , the regression equation is significant; When F 0.05 ( m , n − m − 1 ) ≥ F ≥ F 0.1 ( m , n − m − 1 ) , the regression equation is significant at the 0.1 level; When F < F 0.1 ( m , n − m − 1 ) , the regression equation is not significant.

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