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: Julong D
: Introduction to Grey System Theory : : 1989 : : The Journal of Grey System : 1 : Julong D. Introduction to Grey System Theory // The Journal of Grey System. 1989. Vol. 1. P. 1 24. : Grey System theory was initiated in 1982. As far as information is concerned, the systems which lack information, such as structure message, operation mechanism and behavior document, are referred to as Grey systems. For example, the human body, agriculture, economy, etc., are Grey Systems. : (pdf) : 2869, : 35093, : 5. |