The Research And Implementation Of The Distributed Multilayer Structure_based Engineering Reconnaissance MIS

With the development of Network technology, especially the rapid progress of Internet, which put forward high request to distributed computing technology. As the main role of computing application, enterprises have to make their business system fit to Network Times. The traditional C/S application system has not meet practical demands, while the application model based on distributed multilayer structure has the assets of clear structure, scalability, configurability, reliability and multiplatform etc. The model has become the major application model in enterprises.As water and electricity engineering reconnaissance has the characters of long period of prophase work, many reconnaissance data, heavy information, complex technology. In addition, its criterion and standard is still being improved and perfected. Implementing engineering construction infomationization is the base of scientizing and modernizing the engineering construction. In order to meet the needs of combining the total database system and the future development of system. The system should have the abilities of extensibility, maintainability and good transplantability. Using the model based on distributed multilayer structure can solve the problem above efficiently.This paper mainly discusses the basic theories and characters of the distributed multilayer application systems, and the relative technology of implementing and developing the systems, including component technology, design principle and development methods of distributed object, as well as multi-ties structure design. At last, in this paper, using these techniques above mentioned to design and implement the engineering reconnaissance management information system based on distributed multilayer structure.