Shigeki Hori Kazuo Tanaka Hua O. Wang Multi-objective structure design for mechanical systems. 116-121 2002 FUZZ-IEEE https://doi.org/10.1109/FUZZ.2002.1004970 conf/fuzzIEEE/2002 db/conf/fuzzIEEE/fuzzIEEE2002.html#HoriTW02