Introduction to Grey system theory
TLDR
The Grey Systeni and its applications are interdisciplinary, cutting across a variety of specialized fields, and it is evident that Grey System theory stands the test of time since 1982 as mentioned in this paper.Abstract:
Grey System theory was initiated in 1982 [7]. As far as information is concerned, the systems which lack information, such as structure message, operation mechanism and behaviour document, are referred to as Grey Systems. For example, the human body, agriculture, economy, etc., are Grey Systems. Usually, on the grounds of existing grey relations, grey elements, grey numbers (denoted by 8 ) one can identify which Grey System is, where \"grey\" means poor, incomplete, uncertain, etc. The goal of Grey Systeni and its applications is to bridge the gap existing between social science and natural science. Thus, one can say that the Grey System theory is interdisciplinary, cutting across a variety of specialized fields, and it is evident that Grey System theory stands the test of time since 1982. As the case stands, the developn~ent of the Grey System-as well as theoretical topic-is coupled with clear applications of the theory in assorted fields. The conccept of the Grey System, in its theory and successful application, is now well known in China. The application fields of the Grey System involve agriculture [23, 77-81, 911, ecology [59], economy [61, 102, 103, 1041, meteorology [58, 74,911, medicine [55, 891, history [63, 641, geography [I], industry [61, earthquake [73, 87, 881, geology [76, 1 191, hydrology [98, 1 121, irrigation strategy [261, military affairs, sports [116], traffic [67], management [30, 97, 1051, material science [82, 831, environment [ 1081, biological protection [69,70], judicial system [loo], etc. Projects which have been successfully completed with the Grey System theory and its applications are as follows: 1. Regional econonlic planning for several provinces in China; 2. To forecast yields of grain for some provinces in China:read more
Citations
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Journal ArticleDOI
A usability study on human-computer interface for middle-aged learners
Jyh-Rong Chou,Shih-Wen Hsiao +1 more
TL;DR: To unemployed middle-aged learners, more males than females were found to exhibit the phenomenon of computerphobia, and the usability of present mouse and monitor devices is preferable to that of the keyboard device and a Windows-based software interface.
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An improved seasonal GM(1,1) model based on the HP filter for forecasting wind power generation in China
Wuyong Qian,Jue Wang +1 more
TL;DR: Wang et al. as discussed by the authors proposed a novel seasonal forecasting method that integrates the HP filter into the grey model GM(1,1) to carry out an empirical analysis based on seasonal wind power generation data between 2013 and 2019 in China.
Journal ArticleDOI
Evaluating the influence of process parameters on soluble microbial products formation using response surface methodology coupled with grey relational analysis
Juan Xu,Guo-Ping Sheng,Hongwei Luo,Fang Fang,Wen-Wei Li,Raymond J. Zeng,Zhong-Hua Tong,Han-Qing Yu +7 more
TL;DR: In this study, response surface methodology (RSM) coupled with grey relational analysis (GRA) method was used to evaluate the effects of substrate concentration, temperature, NH(4)(+)-N concentration and aeration rate on the SMP production in batch activated sludge reactors, finding Carbohydrates to be the major component of SMP.
Journal ArticleDOI
On the application of Grey relational analysis and RIDIT analysis to Likert scale surveys
TL;DR: Two methods, i.e. grey relational analysis and RIDIT analysis, which can be used to analyse data from Likert scale surveys are illustrated and it is found that the results derived from applying the aforementioned methods are very much consistent with each other.
Journal ArticleDOI
Diamond face grinding of WC-Co composite with spark assistance: Experimental study and parameter optimization
TL;DR: In this paper, a face grinding setup for electro-discharge diamond face grinding (EDDG) process is developed for tungsten carbide-cobalt composite (WC-Co) with electrical spark discharge incorporated within face of wheel and flat surface of cylindrical workpiece.
References
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Journal ArticleDOI
Control problems of grey systems
TL;DR: In this paper, the stability and stabilization of a grey system whose state matrix is triangular is studied and the displacement operator and established transfer developed by the author are the indispensable tool for the grey system.
Book ChapterDOI
Grey Decision Making and its Use for The Determination of Irrigation Strategies
TL;DR: The derivation of an irrigation strategy for the People’s Victory Channel is outlined, and experience of recent years proves that the effectiveness of this strategy is satisfactory.
Journal Article
The least parameters controller of decentralized control system
TL;DR: In this article, the existential theorem and the transfer function of the most economical controller by which the poles assignment for the given system may be obtained, are proposed, and the simplest structure and the least parameters controller to stabilize the given decentralized control system are studied.
Journal Article
Sufficient Condition for Stability of Grey Systems and Its Application in the Analysis of Stability of Linear Time-Varying Systems
TL;DR: In this article, the problem of stability of grey linear time-invariant systems is investigated in virtue of the properiest of non-negative irreducible matrices, and the sufficient criterion for stability of gray linear time invariant systems are given, which is helpful to the analysis of the stability of line-time-varying systems as well as grey systems.