Applied Mechanics and Materials Vols. 713-715

Abstract: In BitTorrent network, how to avoid free-riders is an in inevitable problem of improving BitTorrent performance. Using trust management is a trend of P2P transmission. We propose a combine trust management scheme, combining local trust value and trust value from neighbors to calculate a combine trust value. The combine trust value represents the spread of reputation in the BitTorrent network. Through the combine trust value, peers could recognize the free-riders. Experiment results prove that compare combine trust management scheme with local trust management scheme, the combine trust management could avoid more free-riders, thus has better download performance.

Abstract: It is very useful for improving software quality if we can find which software metrics are more correlative with software defects or defects density. Based on 33 actual software projects, we analyzed 44 software metrics from application level, file level, class level and function level, and do correlation analysis with the number of software defects and defect density, the results show that software metrics have little correlation with the number of software defects, but are correlative with defect density. Through correlation analysis, we selected five metrics that have larger correlation with defect density, these metrics can be used for improving software quality and predicting software defects density.

Abstract: With the rapid development of communication technology and the growth of mobile devices, the development of intelligent district network will be centered on IP multimedia which integrates the whole business. Meanwhile, information overload becomes a new problem. A reasonable network structure with low cost and stable performance, providing accurate information access for intelligent district users, becomes the focus of current research. This paper proposes a network topology for mobile intelligent district based on JXTA, designing and implementing information push service platform, which not only satisfies the network demand of intelligent district, but also satisfies users with a real time, accurate and stable information access.

Abstract: With the development of computer, network, multimedia technology, digital media resources with many types and huge amount are increasing dramatically, so this results in a more serious requirement on digital media resource management. Digital media resource management system based on SOA is put forward in this paper in the light of the problems of existing media resource management system. SOA, architecture of new generation, is one of the most ideal solutions to integrate application systems. The system solved the problem of heterogeneity fundamentally, and maximum integration and sharing of resources in management system can be achieved. Study achieved an integrated digital media resource management system and the problem of resource sharing was solved so as to adapt to the digital media resource management in big data era.

Abstract: A Fire Prevention system is designed, which uses the composite fire detector, integrating four various sensors of smokescope, temperature, CO density and gas to sample the four different fire information around the field. The fusion system of fire information based on fuzzy neural network is built that is used to make fusion on the detected fire information and confirm the final case of fire.

Abstract: This paper takes reconfigurable technology and platform as well as component framework thought as the theoretical support, combines with Lua script and Dynamic-link library (DLL) technology and takes VC++ as development tool to construct a universal reconfigurable computer software platform based on wxWidgets framework library. The design of this platform itself is a main frame structure, and it can realize software interface, function, arithmetic and the reconfigurable structures from other aspects by the combination of different modules. This platform has the characteristics of practicability and foresight, and it also provides a new approach and method for user to customize business component quickly, so as to realize specific needs.

Abstract: Office automation system provides enterprises with advanced office information processing means, immensely enhances office productivity and the quality of office, and enhances office management and decision automation and scientific levels. For the difficult problems in the development of office automation systems, this paper launched study for its framework. Firstly, it researches the fundamental framework composed by the user layer, service layer, application layer, the data support layer; then, researches the technical framework which uses Lotus Domino / Notes as the development platform and described its various components; Finally, researches the functional framework composed by the personal office, administration, document systems, public information, information systems, systems management and so on six large modules. Architecture technology provides a large number of software reuse, thereby improves development efficiency. OA system of developing using the contents of this paper has advantage of a clear structure, stable performance, easy to maintain, easy to transplant and so on.

Abstract: A call admission control (CAC) protocol is proposed for integrated service WLAN networks in this paper. A popular admission protocol is to admit the incoming calls into the WLAN networks whenever it is available so as to take advantage of low cost and large bandwidth of the WLANs. However, the popular protocol can’t guarantee the QoS of the calls. In order to guarantee the QoS, the proposed protocol maps the characteristics (such as bit rate, bit error rate) of different services into the equivalent spectral bandwidth, and dynamically distributes the equivalent bandwidth to different calls. As a result, the QoS of the calls can be guaranteed, and the spectral efficiency has been developed.

Abstract: When tackling the problem of mining multiple fake identities which are controlled by the same individual in internet, traditional techniques used to analyze the posted comments using text-based methods. However, these texts are always in colloquial style which make the effect may not be as obvious as expected. In this paper a new multiple identities linking algorithm is proposed based on the fine-grained analysis of co-occurrence degree of user accounts using sliding window model. Finally, a series of experiments show the effectiveness of our proposed method.

Abstract: Network traffic is the key factor to describe the adaptive business of Internet. As Internet becomes key battlefield of cyber warfare, how to model the Internet traffic at the macro level has become a hot research topic in war simulation and cyber warfare. Focusing on the global undersea cable system which serves as the backbone of the Internet, this paper proposes an Internet traffic modeling method based on multi-commodity flow. This method can estimate the traffic demand between each pair of regions, generate traffic flow distribution in global undersea cable system, and support adaptive adjustment of Internet traffic according to damage situation of undersea cable system in a crisis. Finally, the method is validated by an example.