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A grey system means that a system in which part of information is known and part of information is unknown. Formally, grey systems theory describes uncertainty by interval-valued unknowns called grey numbers, with the width of the interval reflecting more or less precise knowledge. [3]
Deng Julong (Chinese: 邓聚龙; January 1933 – June 22, 2013) was a professor of Huazhong University of Science and Technology, Wuhan, China.He is acknowledged as the founder of grey system theory, first proposed in 1982 with the publication of his paper “Control problems of grey systems,” in the international journal Systems and Control Letter, edited at the time by Roger W. Brockett ...
Liu is an honorary fellow of the World Organisation of Systems and Cybernetics, [6] and an honorary editor of "International Journal of Grey Systems" (USA). [7] German Chancellor Angela Merkel mentioned Liu's contributions to grey system theory in a 2019 speech at Huazhong University of Science and Technology. [8]
This list of types of systems theory gives an overview of different types of systems theory, which are mentioned in scientific book titles or articles. [1] The following more than 40 types of systems theory are all explicitly named systems theory and represent a unique conceptual framework in a specific field of science .
Starting in early 1997, Lin collaborated with Sifeng Liu on their works of a new theory of data analysis for partially known and partially unknown systems. [11] This theory was initially founded by Julong Deng of Huazhong University of Science and Technology, Wuhan, in 1982 with the publication of his paper “Control problems of grey systems ...
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Thus, almost all models are grey box models as opposed to black box where no model form is assumed or white box models that are purely theoretical. Some models assume a special form such as a linear regression [6] [7] or neural network. [8] [9] These have special analysis methods.
This is where the principle of difference is brought into play: every element in a system is defined by its differences from the other elements. In most modes of interpretation, the S-axis is a hyponym of the ~S-axis. The ~S 1 element combines aspects of S 1 and S 2 and is also contradictory to S 1. The ~S 2 element contains aspects of neither ...