Applied Mechanics and Materials Vols. 321-324

Abstract: Failure Detection periodically detects node validity to maintain application layer network stability. The detection cycle interval value is a key parameter for detection scheme performance; there have been few studies on models of analyzing cycle interval value affecting the scheme. We propose a dynamic model of hierarchical application layer multicast tree node failure epidemic SIRS (NFE-SIRS). The NFE-SIRS analyzes statistical node failure in hierarchical application layer multicast tree structure, and models relationship between cycle interval value and detection scheme repair behavior, finally obtains the expected cycle interval value to improve detection scheme performance. Simulation shows that, the NFE-SIRS can dramatically improve detection scheme performance compared with common fixed cycle interval detection scheme.

Abstract: In this paper, how to analyses the downlink performance of the cellular system combining with site diversity operation and antenna diversity is introduced first. On the basis of Gaussian approximation of the interference components, the changes of bit error rate (BER) in the given set of channel is expressed in receiving signals. By using the Monte-Carlo numerical method, the local average BER is then calculated through comparing the conditional BER with the given set of channel gains. The outage probability is considered to measure the distribution of the local average BER and the downlink capacity. Computer simulation results are discussed finally.

Abstract: Taking the higher vocational college students as the main study object, apply the network project management in network professional resource libraries construction and curriculum effective teaching, establish a process assessment mechanism, and then expanse students' initiative study consciousness, practical ability, innovation ability and professional extension ability.

Abstract: In this Paper, the Concept of Generalized Fuzzy α-Ideal of BCI-Algebra is Introduced. the Following Results are Obtained: for a BCI-Algebra X, any Generalized Fuzzy α-Ideal of X must be a Generalized Fuzzy Ideal; a Fuzzy Set A of X is a Generalized Fuzzy α-Ideal of X if and only if for all t∈[λ,μ], A_t is either Empty or an α-Ideal of X; Suppose that A and B are Generalized Fuzzy α-Ideals of X, then so are A∩B and A×B. also, a Characterizations of Generalized Fuzzy α-Ideal is Given.

Abstract: With the development of modern information technology and the popularity of the Internet, people's lives, learning, work and exchanges have been profound changes, more and more people use QQ, MSN, E-mail Blog, BBS tool cyber space exchanges and communication, and gradually formed one by one based on individual interests and the common information needs of different network aggregates, that is the online community. The network thus also entered the era of community, online communities are popular, is becoming popular in the online world users to access, an important platform for exchange and dissemination of information. From the micro-, macro-different aspects of a comprehensive analysis of online communities, information on the organization mode, and focus on the individual needs of community members as the starting point, put forward the online community in the personality of the information the organization mode of the build program, improvements to the online community information organization mode and optimization of important reference value.

Abstract: In unstructured P2P network, mismatch between logical topology and physical topology cause communication latency increasing and network load heaving. Consider the position and attribute of peers, the issues proposed a three layers mixed P2P network model. In the model, neighbor peers form domain, peers with the similar character compose groups in every domain. In the third layer of model, resource routing table is introduced to performance resource searching cross-domain. Simultaneously, P2P network dynamic adaptability is described detaily. Simulation result show the model can effectively shorten resource search delay and reduce the network load.

Abstract: This paper mainly introduces FlexRay, a high speed, real-time and high reliability bus technology, and researches network topology structure and network communication protocol of FlexRay bus. Then this paper points out that the premise of analyzing FlexRay protocol is catching the bus data transmission, and designs a data acquisition and analysis system with FreeMASTER software and Tektronix TDS3012B digital phosphor oscilloscope. In order to verify the accuracy of the software FlexRay interface design, this paper also describes the analysis and verification procedure of the timing sequence of FlexRay bus. Lastly, this paper reminds of the application prospect of this system.

Abstract: In order to identify P2P traffic quickly and accurately as early as possible, an early intelligent P2P traffic identification method(EIIC) is proposed, which uses the size of early three packets payload and server port number obtained from the TCP flow as flow feature and classifies the traffic based on C4.5 algorithm. The results show that EIIC satisfies the following conditions: extracted features used, training samples selected under the unbiased conditions, it can be adaptive to actual network conditions and early classify the Internet traffic into application among WEB, MAIL, BitTorrent and eMule categories efficiently and quickly.

Abstract: At present, the transportation industry brings energy consumption, pollution and traffic congestion is becoming more and more serious, which has greatly restricted the economic and social development. This paper elaborates the concepts of Internet of things, intelligent transportation, and Internet of vehicles; Internet of vehicles based on Internet of Things technology is considered as an effective method to solve road congestion. The key technologies of the Internet of vehicles include traffic information perception technology, network communication technology, and cloud computing technologies etc. among them, radio frequency identification technology, sensor technology, floating car data technology, and GPS positioning technology are the focus. Application of Internet of vehicles is discussed, and its future development is prospected.

Abstract: The characters of more high speed computing and much less low power dissipation are needed to settle for convolutional encodes. In this paper, we present a parallel method for convolutional encodes with SMIC 0.35μm CMOS technology; hardware design and VLSI implementation of this algorithm are also presented. Use this method, parallel circuits structure can be easily designed, which take on excellent characters of more high speed computing and low power dissipation compared with traditional serial shift register structure for convolutional encodes.