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Description: The grey system is relative to the black system and the white system. White system: the internal characteristics of the system are completely known, that is, the information of the system is completely adequate. Black system: The internal information of a system is unknown to the outside world and can only be observed and studied through its connections with the outside world. Grey system: part of the information is known, the other part of the information is unknown, there is an uncertain relationship between the various factors in the system. Its characteristic is "less data modeling", focusing on the object of "explicit definition and unclear connotation".
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|greymodel.m|| 1718 || 2018-08-29|