A Hybrid of Modified Simplex and Steepest Ascent Methods with Signal to Noise Ratio for Optimal Parameter Settings of ACO. - Ratanaphanyarat, J.; Chunothaisawat, S.; Rungruengsattaya, N.; Tunsiriroongruang, S.; Sriwannusorn, K.; Luangpaiboon, P. (International MultiConference of Engineers & Computer Scientists 2009, 2009)