Based On The Tier C / S Technology, The Mathematics Of Population Management System Design And Implementation

In the nineties, one of the most conspicuous advances is that computing environment is tending towards distributing from centralizing. During this time, the conception of distributed network computing is put forward. It is a transforming to the traditional computing model, and makes a good combination between the data distributing and computing distributing. Multi-tier Client/Server architectures are marvelous in the so many distributing computing models, which has been more and more used in the many multi-tier distributing systems. Multi-tier distributing system is an architecture that is usually adopted in the large-scale application system. Compared with the traditional client/server architecture, it has more advantage in the flexibility, expansibility and efficiency. So it is very worth for us to research.According to the design principle of realizing distributing application system, the paper introduces all kinds of design methods of multi-tier distributing system, and emphatically discusses the concrete implementing of the multi-tier distributing application technology in the Digital Resident MIS. It also discusses the key technologies of this system and especially expounds security and optimization of this system, which should not be neglected in the system development.This paper begins with the source and research situation of the related subjects. A brief history of the evolvement of network computing is presented and inhered defects of traditional C/S mode are pointed out. It also introduces the method, principle and implementing technology to realize multi-tier structure. After introducing the main frames and design scheme of the Digital Resident MIS, it presents the procedure of system modeling using UML to analysis the system. It also illuminates the concrete method in the Delphi to implement the middle-tier and client. At the same time, some key technologies used in the system have been embodied in the paper, such as Image Processing, Chinese characters spelling recognition and the maintenance of the Distribute Data Base. In addition, it makes a deep research on security and optimization of this system. At last, it summarizes the research results and puts forward some viewpoints on how to improve software quality of the multi-tier distributing systems.