Road Design And Management Information Systems Research And Development

Highway design management information system is a complex system, which is fit for design corporation. The system integrates design with management and assists the leaders in making decision and prediction reasonably.According to the requirement of design enterprise, the farther analysis of HDMIS is carried out with object-oriented method. By the analyses of use case, its scope of function is defined, and its computer model is set up.In optimal decision model: (T) nine main environmental impact indexes are summarized and qualmed from the main aspect of environmental impact of road construction based on the principles of comparability and measurability; ?calculate each index with analytic hierarchy process, and introduce the concepts of educing matrix and absolute coincidence matrix to adjust judgment matrix in order to meet with satisfactory consistency; (3) introduce the distance to calculate the weight of expert; ?analyze the relationship coefficients with gray relationship method, then integrate the weights of indices and experts with them to obtain the compositor of ail of the schemes.The prediction module places a special emphasis on analyze the mathematics model. Analyze the defect of gray prediction formula, and point out the structure of background value ha's an important influence on the precision. From the point of view, a new calculation formula of background value is proposed, and the improvement could make the gray model have the ability to optimize the modeling so as to obtain the optimal results. Predict the coming statuses and the probability of each status dynamically, combined with Markov model.In addition, according to the research and the method in the paper, HDMIS software was developed with Access97 and Visual Basic6.0 under Windows98. And many opening were set in software so as to extend and perfect the function of HDMIS.