The Stability Evaluation System For Slopes Based On CBR In Three Gorges Reservoir Area

Combined with some related subjects such as the special fund on Three Gorges reservoir area of the Minister of Land and Resource P.R.C(SXKY4-041), the thesis adopts the Case Based Reasoning technology and other artificial intelligence(AI) technology to form theoretical basis to evaluate slope stability in Three Gorges reservoir Area. It is using Matlab mixed with VC programming to develop one object-oriented (OO)intelligent system, it is called TGSE-CBR System.Firstly, this thesis includes as follows, summarizing the research present status and trend in development of the CBR, expounding the basic operating principle and working process of CBR, giving in detailed case representation and case retrieval method and case fabric method which are used widely at present, introducing simply the CBR System which is appeared both here and abroad.Secondly, this thesis includes as follows: comparing in briefly conventional slope stability evaluation system with the existing popular AI methods, giving their merits and faults, leading-in case retrieval from rough sets(RS) theory adopt object-oriented representation method according to the characters of slope field, meanwhile, introducing some basic conception of RS Theory and its the application in CBR, discussing mainly and in detailed two kinds of slope case retrieval methods based on Radius Based Function and Bayes network, and introducing how to form radial primary neural network and Bayes network, giving the example with Simulate Anneal Arithmetic to optimizing characteristic attribute weights and the example with Field Theory based Adaptive Resonance Theory to learning case.Finally, the frame of the system is constructed and developed in Microsoft Visual C++ 6.0 and Matlab 7.0.4 environments. Meanwhile, it gives the detail of the system's requirement analysis, design idea and flow, and introduces each functional module. The case representation adopts 00 representation method that is one slope instance representing one case, and the data base is constructed in relational database SQL SERVER2000.This thesis introduces 00 method for case representation, and adopts the RBF network and the Bayes network for case index respectively, while RS theory is applied during the indexing process. According with the characters of slope field, corresponding system is constructed, by applying with the practical slope for stability evaluation, the result shows that the system has very important sense for providing effective instructs in engineering practice.The research is sponsored by the special fund on Three Gorges reservoir area of the Minister of Land and Resource P.R.C (SXKY4-041) and grants on research of major Science and Technology project of the Ministry (104135) .