Research And Realization On The Key Points Of The CSCD System

The great development of computer technology brings the human society to the information era .After the integration of computer network and communication tech., a new area based on these two technologies emerged in computer science ---computer supported cooperative work (CSCW).several year's development makes the theory of CSCW been applied to more and more territory ,computer supported cooperative work in design has become the vital technology for a enterprise .the development of a effective CSCD system is the main way for the enterprises to improve their ability of competition .the performance and efficiency of the CSCD system they use may directly determine the revenue they get . So the research about CSCD is quite hot both inside and outside the country.Both the concept and the details design of a complicated product may involve several different fields .So usually there are several subteams for the whole work .these subteams are separated while dependent with each other .Each subteam has its own structure of knowledge ,also has its own tactic solving its partial problem .but all of the subteams have a common finial objective ,that 's the product they design .the communication of ideas and design details between these subteams are necessary .because of the above all ,conflict is unavoidable .we can treat the design process as a process of conflict detection and resolution .So the conflict resolution is a main problem in a CSCD system ; The quality of real time communication in collaborative design is the main standard of the collaborative design system , whether the net environment could transmit the changes that one client have made to both the other clients and the server in time , directly shows the system's collaborative ability .the requirement to the design becomes more and more strict ,the design environment has changed from 2D to 3D ,and the structure used to depict the data of the design object becomes more and more complicated ,all these changes make a great load for the network ,therefore ,to use which mechanism could transfer the visual data faster and lossless through the same internat /internet is a big problem in a CSCD system .There are three main standard of a CSCD system: concurrency, responsiveness, consistence. the two key problems talked in this paper are just aiming at improvements of these three qualities .conflict resolution is always the choke point in a CSCD system , good control of concurrent manipulations improves the concurrency of a CSCD system .The topology structure of the network and the usage of a efficient real time communication mechanism could improve both the consistence and responsiveness of the CSCD system . In this paper, based on the study and comparisons of the existing research and mechanism about the conflict, it propose a category of both the state of the designer and the design operations , and gives out a new method of conflict detection and resolution based on this category .then it gives out a real time communication mechanism based on message .At last , apply the stream file to the CSCD system .All these three parts above could improve the three main standard of the CSCD system .All the theories talked in this paper are based on a concept CSCD system...