Study On Decision Problems Management System And Its Development Component

Problem Management System (PMS) is the important subsystem of DSS and the core subsystem of problem-driven DSS. Problem management methods (e.g. analyzing problem and problem solving) and development of problem management system are the difficulty and emphasis in this research area. A lot of difficult problems about human-machine communication system faced decision problem management system remained unsolved including formal description of decision problem, identification and understanding of decision problem expressed in natural language, sub-problem decomposition of decision problem, intelligent matching and application of solving method for decision problem, effective organization of decision problem base and so on. With respect to these problems, this dissertation discusses the more intelligent general method of management and analysis for decision problem by analyzing the common characteristic and integrating each advantage of human and computer, and researches development component of PMS to provide more practical means and tools for the development of problem driven DSS.The main research content and result of this dissertation include:(1) Research on characteristic analysis and description method of decision problem. Decision problem is regarded as a complex system. On the basis of analyzing interior structure and characteristic of decision problem, an object-oriented problem vector space model is proposed to act as description method of decision problem system. At the same time, problem vector space model is applied to research the attribute type, attribute structure, the change law of attribute valuing state in the course of problem understanding and solving, and the relation of sub-problem decomposition among problem attribute identification, analysis and problem solving. Then general method of problem handing is drawn from description, analysis and understanding, sub-problem causing and problem soling scheme forming of decision problem.(2) Research on intelligent method of decision problem management. On the basis of general method of problem solving acquired from characteristic analysis of decision problem, knowledge management technology is introduced to the solving method to research three core issues involved in knowledge management based intelligent handing approach of decision problem: problem base organization mode of PMS, problem knowledge structure, problem intelligent understanding, and problem intelligent solving process and approach. A problem base management approach embed in knowledge base is suggested to research the mode of problem base embed into knowledge base, basic structure of corresponding problem base and knowledge base. Meanwhile, problem knowledge structure is put forward according to varieties of knowledge composition and data structure involved in decision problem handing. In addition, concrete flow and mechanism of knowledge management based problem understanding and solving is presented according to problem description identification type and solving method, valuing state of problem attribute for identifying sub-problem.(3) Research on relevant model and technology of decision problem intelligent identification. On the basis of above-mentioned intelligent handing method of decision problem, problem attribute identification, problem type identification, model and algorithm of sub-problem identification are built. By supplying choosing cause of Chinese sentence segmentation algorithm, intelligent identification model of decision problem surface layer attribute is built based on segmentation algorithm, clause division algorithm and syntax analysis algorithm. Intelligent identification model of decision problem concealed attribute is built based on double key words searching rule and problem type knowledge base matching rule. Intelligent identification model of sub-problem is also built based on sub-problem producing rule and constructing rule.(4) Research on development component of decision problem management system. Function structure of general problem management system is designed according to the characteristic of decision problem, proposed problem intelligent handing method and model. The function structure is moduled to design out problem management system development component (PMS-DC). The object, class, control, its attribute, method and event contained in PMS-DC are discussed in detail. The relation among variety of classes and controls in PMS-DC is discussed. And the relation among other components in general DSS generator under internet environment (i-GDSSG) is also discussed. Exterior interface of PMS-DC is designed and component distributing strategy in special DSS is present. (5) Practical application of component. The designed and developed PMS-DC and relevant component of i-GDSS in this dissertation is actually a problem driven DSS named CMTIDSS. Applying effect shows that developing the problem-oriented special DSS by introducing PMS-DC and relevant component not only improves developing efficiency, but also effectively manages and deals with decision problem expressed in Chinese natural language.