Research On Data And Computing Collaboration In Virtual Geographic Enviornment Based On MAS

As a new research direction, collaborative virtual geographic environment (CVGE) has some essential characteristics. Multidimensional and perceptive virtual environment accords with people's cognition characteristic, distributed system structure can offer experts, officers and citizens a intercourse, discussion and decision-making platform, and cooperated mechanism can make sure the orderliness in intercourse process. All of these features make CVGE naturally become an important research direction of geographic science. Besides four basic features, namely immersion, interactivity, information intensity and intelligent objects, CVGE also owns other characteristics such as distribution, share, collaboratiion and multiuser.Collaborative mechanism among multiuser, including communication, data, and computing collaboration, has been becoming one of research's key issues. Now some key problems of CVGE such as open system structure, distributed resource collaboration, cooperative control mechanism for multiuser, and bottleneck restriction of network bandwidth, have not been discussed in detail and a practical feasible solution has not been fully implemented. According to interdisciplinary method, this paper firstly designs an agent-based hybrid cooperative control model and dynamic group algorithm for solving collaboration task. Based on MAS, CVGE system architecture and some key problems, such as dynamic group algorithm and concurrency control, are also discussed. Meanwhile data collaboration, computing collaboration and real time virtual environment collaboration are discussed in detail. Finally, a prototype system is developed and the experimental results prove that the scheme addressed in the paper is feasible and efficient. The major context of the paper is listed as follows:1) CVGE users' tools and platforms are heterogeneous, and they may intermittently join or leave system environment. In order to make interactive control more flexible and efficient, the paper firstly builds up CVGE multi agent system after analyzing existing cooperation models. Then the paper makes use of some merits of centralized and decentralized communication pattern of among agents and designed hybrid cooperative control model, which some agents can communicate directly, while others agents transfer information indirectly. This model can reduce server's...