Applied Mechanics and Materials Vols. 241-244

Abstract: Evaluation model is widely used in the individuals and enterprises. Because of the rapid development of the Internet video transmission, the request of the credibility of the video portal is much higher. So the research of the Internet video portal evaluation model becomes a significant issue. This paper realized the evaluation and classification of the user group based on the data mining evaluation classification technology and the principle of fuzzy clustering, and through the construction of the mathematical model and behavioral analysis of Internet video users. This paper also evaluates the effectiveness of the model through the existing evaluation model algorithm and the analysis of the samples.

Abstract: The paper synoptically discusses the basic technological process of the ray tracing method, analyzes its parallel algorithms. Introduce the recent research focus of the field from study on real-time ray tracing and based ray tracing of graphics hardware. Point out the advantages and disadvantages of the ray tracing algorithms to solve scene rendering as well as future research priorities.

Abstract: In order to reduce the noise sensitivity of the SAR (synthetic aperture radar) image registration, a image registration algorithm which basing on the ratio mutual information (RatioMI) is proposed in this paper. Firstly, the ratio images of the reference image and the floating image are gotten by using the ratio operator, and then take the two ratio images as a similar characteristic quantity to construct the similarity measure function which was used in the optimization process of the image registration experiment. The experimental results of the SAR image registration show that the new registration algorithm which based on the RatioMI is effectively in avoiding the local maxima point problems causing by speckle noise.

Abstract: It is a challenge to transform legacy XML-based data into ontology for applications of the semantic web, such as semantic-based integrations, intelligent web searching, and internet based knowledge reasoning. We propose a new technique to transform XML data into ontology data automatically by modeling XML documents semantically. Firstly, we provide the XML a semantically interpretation by developing a graph-based formal language, w-graph. Then, the result of the interpretation can be automatically mapped into OWL web ontology language with semantics preserved. The proof of semantics preserved also been considered, and automatic mapping tool has been developed.

Abstract: This paper applied Bayesian Networks to the analysis of the reliability of computer information systems. After studying the internal structures of the systems, we divided the factors affecting the system reliability into two parts. One is the part of components and the other is the part of connections. Treating the components and connections as nodes, we then constructed a Bayesian Network of computer information systems. Based on the individual probability of each node we calculate the respective reliability of the component subsystem, the connection subsystem and the entire system. In the fourth part we gave a specific example. It was found that the reliability model based on Bayesian Networks had a good diagnostic function, which could help decision-makers to find the reasons for the unreliability of the system.

Abstract: ln this paper, using a deep result on the existence of primitive divisors of Lehmer numbers given by Y. Bilu, G. Hanrot and P. M. Voutier, we prove that the equation has no positive integer solution (x, y, m, p, q), where p and q are odd primes with p>3, gcd(x, y)=1 and y is not the sum of two consecutive squares.

Abstract: In order to achieve real-time data output in synthetic aperture radar (SAR) imaging system, high-speed FFT transformation is needed. In this article, we proposed the program that uses the new generation of high-speed, large-capacity Virtex series FPGA to implement radix-4 FFT algorithm and simulated it with the Modelsim software, and then through the comparative analysis of simulation results by MATLAB. After analyzing the results compared with MATLAB simulation, it shows that FFT module has stable performance, fast operation and fully meets the radar data real-time processing requirements.

Abstract: With the development of interactive business for smart grid, for the security access requirement of kinds of business terminal, this paper proposed security access of power terminal on trusted network connection in power of things which combined with power of things and kinds of power terminals on the basis of trusted network connection. By discussing in detail security access architecture of power terminal and flow, the feasibility of program design is confirmed.

Abstract: The thesis researches and analyzes the ways of information query from the model of SaaS (Software-as-a-service) in cloud computing frame to establish a common data model by using XML. It puts forward a frame of integrated query of multi-resources information by the way of SaaS application by connecting the query of heterogeneous data in the way of the middleware and combining the method of interface software with the method of gathering database metadata during cross search. The model will facilitate querying effectively and utilizing fully rich information resources in the field of information query for users; effectively reduce the costs of users without maintaining and managing; promote the integration of social resources and produce the beneficial result of the scale economy.

Abstract: The development of 3G has made E-commerce become conveniently and fast. A system is proposed in this paper that is a 3G mobile e-commerce transaction system based on Web Service. And the double data encryption algorithm is also applied. It can be paid online to realize the enterprise mobile users in the 3G network, shopping needs, and ensures the security.