Grey System Theory and Its Application to Tourism Market Forecasting——Take Guilin as an Example

By Li-ming Zhao. 2007

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Comparative Tests of Beams and Columns Made of Recycled Aggregate Concrete and Natural Aggregate Concrete (2007, methodology): “…n X x x x n = = = = (3) The grey correlation coefficient: 0 0 0 0 0 ( ( ), ( )) min min ( ) ( ) max max ( ) ( ) ( ) ( ) max max ( ) ( ) i i ii j i j i ii j r x j x j x j x j x j x j x j x j x j x j β β − + − = − + − (4) β is a recognition coefficient and generally defined as 0.5 (Liu and Xie 2008).”