Research On The Rough Set Theory And Its Application To Analyze The Investment Environment Factors

The research objects of modern management and decision-making are often very complicated whose properties are shown often unclearly and incompletely, and people needs to inspect the associated mass data, to seek their intrinsically contradictions and find the potential laws and to draw the rules to value the uncertainty of system. Then the suitable decision can be drawn up out based on these foundations.The theory of rough set is a new mathematical tool to deal with uncertain knowledge. Its power property is that the decision rules are determined by given data associated with reducing knowledge and analyzing dependence of knowledge without any extra prior information. Therefore the theory of rough set can effectively help decision person to deal with the decision problem of complex system.To study the theory and methods of knowledge reduction, rules acquire in information system as well as incomplete information system is a heart problem on the topic of studying the rough set theory and its applications. Several different theories and methods have been established from different points of views. But these still exists a large number of theory problems to be researched on these aspects. Moreover the investment environment is an organic system that with complicated structure involving many factors such as economic environment, society environment, resources environments and infrastructure etc, the data to weigh these factors possess many kinds restricting and relying on mutually.At present, one set of evaluation methods and models to value the investment environment has been shaped in home and abroad basically, but these evaluation methods almost all suffer the influence of subjective factor of evaluation person on...