| 摘 要： | 1.IntroductionHuman language abounds in fuzzy conceots, for example:the concept of the word”morning”is cutie fuzzy,for we don’t know when exactly morning starts,and when exady itends, in Chinese people’s eye,“morning”may last till 8 or 9 a.m.,but in Europeans’eye,the period of time before 11 a.m.can still be called “morning”.The concept of the word“evening”is also fuzzy,the Chinese people usually call the time before the sky gets dark“evening”,about 9 p.m.,while the Europeans call the time before 11 p.m.“evening”.Thewords like“devil”,“dragon”,“goblin”,“unicorn”,“love”,“democracy”,“freedom”,“humanrights”,“centaur”…,which we commonly see,are all very fuzzy,and each personunderstands them differently according to his or her personal experience and imagination.In1965,L.A.Zadeh,professor of Computer science Division,Dept.of EECS and ERL,university of California,published his famous paper“Fuzzy sets”,which,to some extent,made the fuzzy theory formalied and mathematically for
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