The Comparison of Grey System and the Verhulst Model for Rainfall and Water in Dam Prediction

Table 9

The search outcomes of “rough set.”

Time	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999
Number of papers	0	0	0	0	0	0	1	1	9	19
Time	2000	2001	2002	2003	2004	2005	2006	2006	2007	2008
Number of papers	50	102	142	267	412	553	710	779	919	3964