Applied Mechanics and Materials Vols. 220-223

Abstract: Remote experimental teaching and learning platform is a modern information technology platform which is based on network communication technology, embedded technology and network technology and so on. It can use Internet to monitor and control the remote production process or experiment process. In this paper, a remote experimental platform is introduced including software design and hardware design of tank level control system. The control scheme of tank level control system and two results to expected values have been proposed.

Abstract: Using MATLAB the spectrum comparative analysis was gived between complex Cole-Cole model and basic Cole-Cole model when theirs parameters change. The results show that the complex resistivity curve shape of complex model is limitted by total variation of two same kind parameters of complex model. The variation rule of the curve shape is consistent with basic mode when same kind parameters change. The influent of polarization rate and frequency correlation coefficient is bigger than time constant parameter. The resistivity curve of parallel complex model and series complex model is very similar. Then points out the difficulties and problems faced by the extraction of IP parameters.

Abstract: Aiming at existing exhibitions, informationized management system can only meet the requirement of monomer exhibition management, but which cannot meet the needs of management chain and integration of resources of a large number of exhibitions together. For the traditional B2B e-commerce only provides a platform of exchanging information and communication for the supplier and requisitioning party, we design a SAAS-based management platform to build management of all the management works of an amount of actual exhibitions, as well as the use of rich media technology for Webcast and interactive of activities of the exhibition, and reduction of management costs in all of the procedures, which builds virtual year-round exhibitions online, based on the exhibition system and huge B2B resources to realize the target of constructing a B2B e-commerce platform which keeps a complementary and coexistence of online-operating and virtual year-round exhibitions, and more operational efficiency as well.

Abstract: The hyperbolic integral differential equations are widely used in practical problems of heat conduction,nuclear reactions dynamics, viscous elastic mechanics, biomechanics, the pressure in loose medium with memory materials. We shall study a class of nonlinear hyperbolic integral differential equation in this paper. Using finite element method, we obtain some superconvergence results.

Abstract: To solve the lack of intelligence and the traditional Ajax engine server’s overload problem, we design a new Ajax engine based on the browser caching mechanism named ICFE (Intelligent Client Flow Engine) which separates the business logic layer from data access layer, and transfers business logic layer and the relevant data to the client catch to implement.

Abstract: According to the deficiency of Chord algorithm supporting single keyword query only, a P2P framework-Peano Chord (PC) by combining the Peano and Chord is proposed for managing service resources, which combines Peano space filling curve and P2P Service Resources and supports DHT-based multi-keyword query and approximate query by means of Peano index to improve resources searching ability.

Abstract: Labeling the nodes of an XML document allows queries without accessing the original file. For dynamic XML documents, the labeling scheme should support both efficient queries and insertion updates. This paper proposed a new labeling scheme, DCPL (Dynamic Common Prefix Labeling), to process dynamic XML documents efficiently. Compared with the existing schemes, DCPL presents a prominent feature of maintaining its simplicity and efficiency in dynamic and static documents. Meanwhile, it can efficiently support labeling updates, especially frequent updates, without sacrifices of query performance. The conducted experiments have shown that our proposal works better than the previous ones.

Abstract: Generally working in severe conditions, mechanical equipments are subjected to progressive deterioration of their state. The mechanical failures account for more than 60% of breakdowns of the system. Therefore, the identification of impending mechanical fault is very important to prevent the system from illness running. It generally requires high performance computer to complete the traditional parallel computing, while the parallel FFT algorithm based on Hadoop MapReduce programming model can be realized in the low-end machines. Combining with Cloud Computing and equipment fault diagnosis technology, it can realize the massive data parallel computing and distributed storage. The result of experiment shows that it would provide a good solution and technical support for mechanical equipment on-line monitoring and real-time fault diagnosis.

Abstract: Accessing CAD geometry for mesh generation is one of the major technical issues related to moving simulation forward. This paper studies the automatic identification of features from CAD models based on STL files. The STL file generated with the well-known CAD software UG is used to transfer the surface geometrical data information. A new STL data file with topological connection is constructed for the calculation in the next. The geometric characters of the solid models are correctly identified by combining the edge-based method and the face-based method. It provides a foundation for precise matching of the element meshes to the boundaries of the solid model and improving the mesh quality.

Abstract: Network covert channel is a steganography technology that uses network traffic data as a carrier to transfer the secret data. This paper analyzes the working principle of network covert channels, and summarizes the commonly used construction technology of network covert channels. Then it analyzes the characteristics of the HTTP header lines and gives some methods of constructing network covert channels with these characteristics. Network covert channels based on the HTTP header lines are simple, flexible, and difficult to be detected and shielded.