Applied Mechanics and Materials Vols. 198-199

Abstract: When the question that how to implement Software as a Service(SaaS) is presented, there are problems that how to design and implement configurable applications on multi-layers, meanwhile system performance is considered. This paper combines the design and implementation of graduation project system, provides SaaS configurable solutions based on the metadata and SaaS configurable solutions based on the XML according to the different scenes. Otherwise, for the configurability of business process in heterogenous environment, the paper presents the SOA oriented configurable business process. And the runtime of configurable system is also proposed. Finally, a real-life scenario is provided to demonstrate the benefits of using the proposed method.

Abstract: Secure channel technologies alone can not provide the sufficient protection to the server data as long as the server can not guarantee the trustworthiness of the client program which accesses the server. The current Trusted Computing solution offers the guarantee on the trustworthiness of the client program by evaluating the integrity of all executable elements on the client platform. However, this solution may not work effectively in the monolithic legacy and commodity operating system. This paper considers the remote attestation of program execution on the untrusted legacy platform. We propose an architecture, which (1) collects the run-time information of the client program in a secure, scalable and OS-transparent way, and (2) reports to the remote server the collected run-time information of the client program in a lightweight and secure way. The architecture achieves these features by exploiting the system virtualization technology, the existing VMI tools, and the time stamping functionality in TCG TPM. We give the detailed description of the architecture.

Abstract: Allowing trainees to get a real sense of immersion, an advanced virtual maintenance training system of equipment must have an effective Human Computer Interaction. This paper discussed issues related to the design of Human Computer Interaction used in Virtual Maintenance Training System of Equipment, and provided specific implementation of three typical features: implementation of display text messages in real time; implementation of response to user input events; implementation of getting the interactive results. Based on a real-time visual simulation software system named Vega, human computer interaction were accomplished, and presented the code segment. Results show that the interface of human computer interaction was very friendly, and the Virtual Maintenance Training System of Equipment was efficient.

Abstract: Stanford University proposed a new network switch model named OpenFlow for the research of network innovation. OpenFlow enables researchers to control the behavior of the network by managing flow table. NetMagic is an open network switching platform for the innovative research of next generation Internet architecture. This paper introduces OpenFlow and NetMagic briefly, and implements a customized and scalable OpenFlow model system on the NetMagic platform. Finally, this paper shows the features and advantages of OpenFlow with an experiment.

Abstract: Worst-Case Execution Time (WCET) is crucial in real-time systems and is very challenging in multicore processors due to the possible runtime inter-thread interferences caused by shared resources. This paper proposes a novel approach to analyze runtime inter-core interferences for consecutive or inconsecutive concurrent programs. Our approach can reasonably estimate runtime inter-core interferences in shared cache by introducing lifetime and instruction fetching timing relations analysis into address mapping method. Compared with the method based on lifetime alone, our proposed approach efficiently improves the tightness of WCET estimation.

Abstract: Scene simulation has been widely used in many fields recently as an outstanding technology. Firstly, this paper introduces the development flow and the modeling technologies of the scene database based on the characteristics of the scene simulation system. Then, the optimization technologies of modeling in constructing the scene simulation database are illuminated. In conclusion, the paper successfully established the scenedatabase of a port with the digital elevation model data and satellite images. The experiment of scene simulation has been done with Vega Prime. The results show that it solves the conflicts of models between complexity and fidelity very well. It runs smoothly and almost meets the demands of voyage training.

Abstract: Along with the Internet technology and mobile intelligent terminal of the development and popularization, traditional college application will be grafted into intelligent terminal has become inevitable, as education evaluation test also is experiencing paperless and network development. Course exam system is will the computer and network communication technology and mobile intelligent terminal applied to teaching field of product, using XML resources and mobile intelligent terminals, to candidates, and teachers numbered bring great convenience, but also for the education of college teaching reform to provide strong support. This system by using the android platform, design and development of the cross-platform J2EE multilayer architecture and open source Linux system, XML database technology and JAVA development tool to Eclipse, using the MVC development, mode of object-oriented analysis and design method, high stability, usability, maintainability, expansibility, portability and lower operational costs.

Abstract: With development of software scale, programmer has been noticed the importance of design pattern. Each pattern has different realization in different platform. As the object-oriented technique develops, application of MVC pattern has been widely used. MVC pattern doesn’t only used in component construction, but also it used in large-scale object-oriented system design, such as e-commerce system. This paper discusses application of MVC on JAVA platform, and analysis advantages and disadvantages of MVC and MVC2.

Abstract: This paper presents a kind of adaptive rendering algorithm based on the data structure of patch block. It adopts the Tessellation technology and index template technology .The terrain is rendered through the index template technology when it does not need high precision geometric characteristic. The paper presents the calculation model of subdivision coefficient based on the patch boundary and deals with the result of the calculation when the terrain needs high precision geometric characteristic. The result of the experiment indicates the algorithm can improve the rate of frame and the effect is more reality. The terrain of higher detail will be rendered when we input more rough grids.

Abstract: How to deal with platform transferring and to improve the adaptability to changes in demand are two problems in E-Commerce applications. MDA technique is one of the most effective methods. The article discusses the core technology and the framework model of MDA. Finally, it takes the ordering system in E-commerce as an example to make a vivid presentation.