Up to now, gs theory has been developing a set of theories and techniques including grey mathematics, grey relational analysis, grey modelling, grey clustering, grey forecasting, grey decision making, grey. The use of grey system theory in predicting the road. Use of taguchi method and grey relational analysis to. All examples presented are based on practical applications of the theory when urgent reallife problems had to be addressed.
In this paper, first, the original predicted values of road traffic. At the end of the 1940s, there appeared systems theory, information theory, cybernetics. Introduction to grey system theory semantic scholar. It was also proposed to use the grey systems theory, which allowed for the extension of the risk matrix analysis method.
Pdf introduction to grey system theory semantic scholar. Grey relational analysis to determine the optimum process. Introduction to grey system theory research information ltd. In view of the universality of the normal distribution, the normality grey number is proposed. Grey systems theory and applications sifeng liu springer.
Liu the current developing status on grey system theory j. In this section, some definitions, notions and results are introduced which are useful to our further consideration of grey systems theory and to arithmetic on the grey numbers calculus as a tool. Grey system is a system with partially known and partially unknown information. This theory of personality which is now widely known as reinforcement sensitivity theoryrst has. Grey system theory stands the test of time since 1982. A brief introduction to grey systems theory emerald insight. Grays reinforcement sensitivity theory rst of personality alan pickering and philip corr jeffrey grays 1976, 1982 behavioural inhibition system bis theory of anxiety has stood well the test of time. The first one compares grey systems theory and interval analysis while revealing the fact that interval analysis is a part of grey mathematics. Introduction to grey system theory the journal of grey. Gst provides tools that facilitate analyses of scant and imperfect information 15. However, it is very dynamic in that it is very difficult to predict the winning bid of a given auction. However, the application of grey system theory in psychology and medicine is rare. This system offers the techniques, notions and ideas to analyze latent and intricate systems.
The first one compares grey systems theory and interval analysis while. There have been numerous studies to design a bidding strategy that. Department of automation, huazhong university of science and technology. The purpose of this paper is to introduce the elementary concepts and fundamental principles of grey systems and the main components of grey systems theory. There are many influencing factors and they are closely related to each other, so it is appropriate and feasible to use grey system theory for evaluation. The gra uses information from the grey system to dynamically compare each factor quantitatively.
A larger value of grg indicates two systems or elements are more similar and smaller. Pdf application of grey system theory in predicting the. The paper presents a threeparameter risk matrix that can be used for the implementation of water safety plans. Artificial neural network ann is a computing system that uses a large number of artificial neurons imitating natural neural ability to deal with an information network by computing sys tem. Evaluating taiwans air quality variation trends using grey system theory. The goal of grey systeni and its applications is to bridge the gap existing between social science and natural science. As far as information is con cerned, the systems which lack information, such as structure message, opera. Pdf a brief introduction to grey systems theory researchgate. This paper analyses the characteristics of neuropsychological studies, such as the particularity of the study subjects and the specialty of the study scheme. The journal of grey system contributes to the advance of knowledge directly related to the fundamental theory and practical applications of grey system. To avoid these disadvantages, this study is the first to integrate the grey system theory with all available firm. All the papers on developments of methodology, modeling technological.
Grey system theory gst poses an alternative to statistical methods for analysing spatial data. The scientific background that grey systems theory comes into being, the astonishing progress that grey systems theory has made in the world of learning and its wideranging applications in the. As far as information is concerned, the systems which lack information, such as structure message, operation. The conccept of the grey system, in its theory and successful application, is now well known in china. Chinese grey system association cgsa was established in 1996. 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.
A conference on grey system theory and applications is held by cgsa every year. After several years rapid development, grey system theory has been applied in various research areas successfully. The most often used new thinking, methods, and models of grey system theory are presented in this paper, such as algorithm rules of grey numbers based on the kernel and the degree of greyness of. Predicting changes in bitcoin price using grey system theory. By this means, grey system theory gst is developed in which the interval grey numbers, as a typical object of gst, characterize the range of data and the grey relational and prediction models. Grey system theory is utilized as a major analyzing approach. Online auctions is a very popular method to buy and sell items on the internet. Cordon collaborative academic practice, nursingnew knowledge and innovation, university health network, toronto, on, canada. The gray man theory is a principal that has been adapted from the military and other professions that practice the gray man theory. The spread of this new theory has taken place as follows. Thus, one can say that the grey system theory is inter disciplinary, cutting across a variety of specialized fields, and it is evident that grey system theory stands the test of time since 1982. Theory and application seeks to foster professional exchanges between scientists and practitioners who are interested in the foundations and applications of grey systems.
The goal of grey system and its applications is to bridge the gap existing between social science and natu ral science. Issue 2 2012 selected papers from the 2011 international conference on grey systems and intelligent services ieee gsis. With the strengths on non functional series for model construction and simple calculation, grey system theory has been utilized for factor analyzing, optimization theorem, forecasting or numerical analyzing in different research fields 37,38,39,40. On the new model system and framework of grey system. Aims to cope with the uncertainty of a system socalled grey. No fee or registration although donations are greatly appreciated.
This method transforms multiple quality characteristics into single grey relational grades. It is one of the most widely used models of grey system theory. During the middle and toward the end of the 1970s, there appeared one by one such new transfield and interfiled theories of systems science as the ultracircular theory, dynamic systems, pansystems, etc. An overview of various system theories and its application in healthcare charissa p. Last but not the least, this book concludes with three appendices. To accomplish this, we use principles and concepts derived from systems theory.
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. Grey system theory in research into preferences regarding. This paper presents the application of grey modeling for thermal spray processing parameter analysis in. Finally, the weight of the circulating water system belongs to each grey class, and the economic performance of the cooling water system is reasonably and objectively evaluated. Sexual harassment, dowry problem, torture, importation of girls, kidnapping, rape and other social problems are forced a woman to commit suicide. The concept is also practiced by undercover agents and intelligence gatherers. The whitening weight function of the grey class is established, and then the whitening value is calculated.
Pdf predicting online auction closing price using grey. The theory of grey systems can be used in various fields to. Grey system model with the fractional order accumulation. Gray relational coefficient grc, gray relational grade grg. For example, the human body, agriculture, economy, etc. Gray man theory truths and misconceptions smart prepper gear. Essentially it is a temporary disguise designed to assist you with remaining covert in order to not make yourself a target. So dive in and choose among a growing library ebooks are added every day or so of free public domain epub, pdf, and kindle ebooks. A method of gray system theory gst which measures the degree of similarity between two systems. The grey system provides multidisciplinary approaches for analysis and abstract modelling of systems for which the information is limited, incomplete and. Theory and application available volumes and issues.
Introduction of grey system theory and uncertainty. The grey systems theory makes it possible to make decisions in the lack of complete information. Grey relational analysis gra, also called dengs grey incidence analysis model, was developed by a chinese professor julong deng of huazhong university of science and technology. In early 1990s, some universities located in australia, china, japan, taiwan, usa, have started offering courses on grey system theory. Toward the end of 1960s and the start of 1970s, there appeared the theory of dissipative structures, synergics, catastrophe, and bifurcations. Grey systems and control, grey relational analysis gra, and gray modeling gm. A new grey system model with the fractional order accumulation is put forward and the priority of new information can be better reflected when the.
A study of using grey system theory and artificial neural. Friedman and karen neuman allen 3 b iopsychosocial assessment and the development of appropriate intervention strategies for a particular client require consideration of the individual in relation to a larger social context. Grey system theory is also adopted to improve the performance of artificial neural network. Approach is based on the level of similarity and variability among all factors to establish their relation. The classic grey theory does not adequately take into account the distribution of data set and lacks the effective methods to analyze and mine big sample in multigranularity. Mostly they present methodologies for separate systems engineering processes. Main contributions to grey system theory came from.
The scientific background that grey systems theory comes into being, the astonishing progress that grey systems theory has made in the world of learning and. This study contributes to propose an approach which effectively assesses performance of medical tourism industry based on considering the economic impact factors as well as provides a conceptual framework for the industry analysis. Grey theory and grey relational analysis grey system gs is the system of which part information is known and part information is unknown. As the case stands, the developnent of the grey system as well as theo retical topicis coupled with clear applications of the theory in assorted fields. A brief introduction to grey systems theory ieee xplore. Grey theory is an essential uncertain knowledge acquisition method for small sample, poor information. Ijerph free fulltext grey system theory in the study. As sirnon 1965 correctly remarked, an introduetion into a. The perturbation theory of least squares method is applied to explain why the traditional accumulated generating operator violates the principle of new information priority of grey system theory. Grey relational analysis to determine the optimum process parameters for openend spinning yarns j.
Grey models require only a limited amount of data to estimate the behavior of unknown systems. Grey system theorybased models in time series prediction. Furthermore, most of the approaches produce sample selection biases. The grey systems theory, established by julong deng in. Practice and theory is a collection of articles written by developers and researches from all around the globe. Evaluating taiwans air quality variation trends using. The journal of grey system research information ltd. It was developed by julong deng 1214 to analyse contemporary systems characterised by incomplete and unreliable data. Research and application for grey relational analysis in. The use of grey systems theory to analyze the water supply. Grey modeling for thermal spray processing parameter analysis meimei liu, yicha zhang, wenjie dong, zexin yu, sifeng liu, samuel gomes, hanlin liao, sihao deng. As the case stands, the developnent of the grey systemas well as theo retical topicis coupled with clear applications of the theory in assorted fields. Grey system theory the analysis of reasonable investment demand of power grid enterprises is a grey system. Grey system theory in the study of medical tourism.
The basic framework of grey system theory initiated by professor julong deng, the founder of grey system theory, is introduced here. The model gm 1,1 is applied for predicting bitcoin prices in section 4 and examples and. During the middle and toward the end of the 1970s, there appeared one by one such new transfield and interfiled. Throughout the course of human evolution, humans have been solving complex problems. Also to discuss the astonishing progress that grey systems theory has made in the world of learning and its wide. These risk factors include man dominated social structure, insecurity of woman, unequal priority level. At global grey, youll find the worlds great literature.
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