We applied the grey system theory to evaluation of chlorophyll (Chl) degradation in Chamaecyparis Sieb.
The proposed approach takes advantage of mathematical analysis power of grey system theory while at the same time utilizing data mining and knowledge discovery power of rough set theory.
Optimization of thermal sensors' placement on machine tools based on grey correlation model of grey system theory is studied.
Optimization of measuring points for machine tool thermal error based on grey system theory
Grey system theory is suitable for the system in which some information is poor, incomplete and uncertain, so it is feasible to study the performance characteristics of EDM with this model.
In this paper, correlation decree of the nine strong events versus the precursory data of Haicheng earthquake has been calculated by using correlated space theory of grey system, while fuzzy cluster analysis is clone on the 7 event data, obtaining much more consistent results. At the same time, the data requirements by the two methods are compred. In order to study effects by different factors, calculation of correlation degree between source parameters of the nine strong events and their aftershock sequence...
In this paper, correlation decree of the nine strong events versus the precursory data of Haicheng earthquake has been calculated by using correlated space theory of grey system, while fuzzy cluster analysis is clone on the 7 event data, obtaining much more consistent results. At the same time, the data requirements by the two methods are compred. In order to study effects by different factors, calculation of correlation degree between source parameters of the nine strong events and their aftershock sequence data is also made. The results indicate that correlation degree and correlation sequence of the precursory data, source parameters and aftershock sequence of the same event might be some different. Possible reasons that cause such differences are discusst.d in the paper,suggesting that as for the better predicted Haicheng and Songpan earthquakes, both are characterizing as small correlation degree on the precursory data, being the most late correlation sequence of each event. There are also two types of varied results from fuzzy cluster analysis, indicating that they are two different types of precursory data in earthquake prediction,
Using the grey system theory in this paper, the predictive model of strong earthquake (M≥7.0) has been found in north China seismic area:According to the prediction above mentioned, the next strong earthquake will take place in north China around 1993.
This paper presents the findings of an investigation by the Delphi Me- thod and the process of summarizing experts'opinions by making use of Grey systems theory.The investigation was made to fifty-three experts aimed in finding out the main factors in the formtion of torrential rain debris Slow.The Grey statistics method is used to summarize the experts'opinions. As a supplement,the Grey relational grade ana]ysis is made on the data ob- tained from surveying and measuring.Based upon the conclusion...
This paper presents the findings of an investigation by the Delphi Me- thod and the process of summarizing experts'opinions by making use of Grey systems theory.The investigation was made to fifty-three experts aimed in finding out the main factors in the formtion of torrential rain debris Slow.The Grey statistics method is used to summarize the experts'opinions. As a supplement,the Grey relational grade ana]ysis is made on the data ob- tained from surveying and measuring.Based upon the conclusion from these studies,the forming of torrential rain debris flow is imputed toeleven main factors classified into three groups according to their importance.
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