To resolve QoS problem in video conference system, a kind of architecture for video conference system was designed, which combined centralized signaling based on SIP with media transport based on P2P. In addition, an improved quantum genetic algorithm was used to solve the multipath routing selection problem. The method broke the shackles of the single-path transmission and adopted multipath transmission mechanism, not only avoiding the underlying network routing errors but effectively improving the reliability of the media transmission.
A video conference system based on SIP is introduced in this paper. It elaborates the structure and design of the system's functionality. The meeting control center of core part of this system is introduced in detail, and the specific implementation methods and control flow is mentioned. The system uses a hierarchical design idea. It is an extension of a strong multi-party video conferencing system solution which utilizes more mature network technology and encryption technology to ensure t real-time and safety of the system.
Software process reuse can improve the quality of software products and save the cost of software development, in order to make it more convenient for software organization to build software process model rapidly and efficiently, a method was proposed to analyze the value model which is based on the Petri net, introduces the concept of time and the implementation of value, through a specific algorithm design to provide guidance and decision-making basis for assessing the reuse of software process.
Model-driven architecture and service-oriented architecture are popular software development methods at the present, these two methods have their own advantages and disadvantages, the proposed SOA-based Model-driven Rapid Development Architecture by combining these two methods, Using colored Petri nets’ tools to study service composition methods specifically, and described five basic logical structure of service composition through formal methods, then gave out the construction method of composite services, finally, verified the effectiveness and safety of the service composition method through the modeling.
In the face of immense Web pages of WWW, how to extract valuable knowledge from the Internet is a difficult problem. The main research work of this paper was to apply FCA (Formal concept analysis) and Web terms on the Web representing the relationship between Web pages and web terms. We deeply studied how to apply Galois to Web page mining, and used the Java language to design the Web pages mining system. The system uses the constructed Galois lattice to extract potential knowledge of WWW. The results prove that the use of Galois Lattices and Web terms for Web pages mining is feasible.
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