Applied Mechanics and Materials Vols. 644-650

Abstract: Big data is mainly for analytic applications, which puts high requirements on data processing ability instead of computational accuracy. In this environment, software engineering-based methods should be carried out with the goal of data processing and computation. To adapt to the development of various analytic applications in big data era, this paper provides a software design model based on big data, and at the same time, analyzes compiler mechanism of big data programming language.

Abstract: This paper introduces P2P applications and its definition. Although this technology has the promising capability of anti-destruction and privacy protection, it still has quite a few intrinsic faults. In this paper, three popular methods of network attack against P2P: Sybil attack, Eclipse attack and DDOS attack. The differences among the three kinds of attack have been pointed out. At last, the defensive measures against the attacks have been introduced.

Abstract: Computer network system is a basis for enterprises to implement informatization construction , to a good network environment, System suitability, and security features of the system. Facing growing international and domestic competitive pressure, companies propose the development of a comprehensive information management strategy; in the process of enterprise Informationization construction, very important thing about the construction of network study environment for enterprises. Papers in reconciling efficiency, robustness, and security of the system on the basis of focusing on system "against" and "applicable" were studied.

Abstract: According to the dynamic characteristics of ad hoc network topology, this paper optimizes the clustering algorithm using node energy consumption and the relative connectivity as the factors of weights. Simulation results show the optimized weighted clustering algorithm (OWCA) get better performance than other algorithm, the cluster heads are distributed evenly, the cluster structure becomes more reasonable and stable.

Abstract: With the growth of multimedia business demand in commercial applications, providing QoS support in Ad Hoc network is more and more important. With the appearance of the business which has strict requirements on the QoS, to provide QoS guarantee in mobile Ad Hoc network will have more important significance. By researching the QoS guarantee mechanism research status of wireless Ad Hoc network, as well as the existing research results and the analysis of the problems remaining to be solved, this paper puts forward a new QoS routing protocol named ProDSR, which adds QoS guarantee mechanism extension to the dynamic source routing protocol (DSR). This protocol makes bandwidth, stability and hop count to be selection criteria for providing QoS guarantee, effectively improves the service quality of mobile Ad Hoc network.

Abstract: The campus network is to provide broadband multimedia network teaching,scientific research and comprehensive information service for teachers and students. With the popularization of campus network and function of continuous improvement,to the campus network security threats are also more and more,through the core switch in campus network by using various safety strategies,including NAT,VLAN,Access-List,effectively guarantee the safety of the campus network.

Abstract: In this paper, 2112 specific correlation data of 2 types cluster were selected as sample to build a weighted network, including each hour sample is represented by a vertex and a correlation between 2 clusters is represented by an edge. We analysis this network structure by complex network theory and computer method. We found that the correlation clusters of 2 media have an important impact on this complex network, and the specific sample follow a frequency distribution of the weighted degrees. Applying the method of k-core shows small groups in this complex network, also the modularity calculating help us find out the key cluster, the correlation cluster, the medium cluster and the interaction path of them. An apparently small-world effect has found by the shortest path calculating effectively. All of these may provide a scientific and reasonable reference for further research.

Abstract: Web-based network management revolving about database puts forward a feasible mode for network information processing and has the characteristics of wide distribution, full interactivity, real-time dynamic and so on in the application; and is beneficial to timely adjustment for network performance and rapid recovery for fault. Combining the technologies of JSP, JavaBean, JDBC, Socket, JavaApplet, Ajax, JavaScript and so on, database-centric network management mode ensures the reliable, efficient and stable operation of configuration, performance, fault, security and accounting management in the development of business network management system, such as TD-SCDMA network, PON network, TMPLS network, IPTV network, power network and so on. In practice, it is worth mentioning that it improves the dynamical and real-time release performance of accounting management, realizes web-based management for rate and bill. Customers could receive bills real-timely in internet and deals with them conveniently. This is propitious to the management of network vendors as well.

Abstract: With the rapidly development of the space-sky information network, more and more satellites have been involved in the network. Adding the aerospace crafts which may be flexible and changeable, the network should be focused on the problem of heterogeneous compatibility and self-organizing network. The emerging Software Defined Networking may solve these problems. As the control plane and the data plane are separated in the architecture, the network can adapt to different protocols and can be flexible in equipment maintenance. In this paper, we propose an improving program of the space-sky network based on the SDN. This program can solve the existing problem of space network to some certain.

Abstract: Campus website in university is the extension of campus culture on the network, which is one of the most direct and effective means to improve university popularity in the information society. From the perspective of communication and information architecture theory, research on the development and construction of campus website in university plays a very important role for promoting the university to the outside and strengthening the internal and external communication. First, we introduce basic theories including mass communication, uses and gratifications and information architecture. Then based on these theories, we conduct basic research on the campus website, find out effective communication ways, comb out website problems in the dissemination process, and as a basis for reference provide ideas and methods for the development of communication strategies of campus websites. Finally, we analyze and summarize interfaces, content and services of campus websites, and propose the design method and implementation technology solutions of campus website construction. The above contents open up a new way for the study of campus website, also broaden this kind of research fields, and they are the important supplements to the website communication studies with certain innovation.