Applied Mechanics and Materials Vols. 263-266

Abstract: Large scale Multi-Processor System-on-a-chip (MPSoC) based on Network on Chip (NoC) can support multiple applications running simultaneously. When the multiple-application workload includes streaming applications processing massive data, the communication concentrated on shared memory can't be ignored. In this paper, we propose a task assignment strategy for multiple-application workload which includes one streaming application on a NoC-based MPSoC. The proposed algorithm first assigns the streaming application centering the multi-port shared memory, and then assigns the other applications minimizing external communication congestion. By adopting the proposed algorithm, the memory-contention tasks are assigned to the PEs close to the shared memory and the overall congestion is minimized. This allows the system to provide better overall performance.

Abstract: Nowadays utilized through the network, the majority of the software has their own particular and complex network interface transmission protocols. Which makes the validation of the interface protocols becomes significant and difficult in the interface testing of the software. In this paper, the network interface protocol is analyzed to help validate the software network interface, based on the capture, analysis, construction and the transmission of the packet. By using this method, the software network interface will be more effectively tested.

Abstract: In this paper, some researches have made on students’ independent learning, employing CDIO International engineering education idea and the theory of association path method and guidance, an intelligent guidance system model based on network teaching platform was designed. The system according to the students frequent access path, learning records and other information, applies Apriori algorithm for data mining, and integrates uploading new points of knowledge and old knowledge, to provide students a learning guidance and help students improve their learning efficiency.

Abstract: Visual simulation is the most important manifestation of virtual reality technology. Take a civil aviation airport as an example of visual simulation, based on the real-time, interactivity and realism of visual simulation system, we discuss Creator 3.0 in building three-dimensional scene of the civilian airport, and the development of visual simulation system based on Vega Prime. The simulation results show that it provides the basis for the safe and reliable in air traffic control, reducing the working pressure of the air traffic controller, improving the operating efficiency of the air traffic, and increasing the traffic flow of air and surface.

Abstract: The technology of screen monitoring and process controlling are widely used in real life. Based on the C# technology, this paper introduces the principle of screen monitoring and process controlling. And it also gives a deep research into its methods and its implementation.

Abstract: According to the characteristics of AVS video data, a RTP encapsulation method based on frame type is proposed. When the video data is encapsulated by the RTP protocol, different types of video data such as sequence header, sequence end, I frame, P frame and B frame are encapsulated with different method. Under the limit of maximum transmission unit (MTU), sequence headers, sequence ends and I frames are encapsulated individually to reduce the packet length and protect the important data. While multiple P frames and B frames are encapsulated into one RTP packet to reduce the quantity of the RTP packets and decrease the overload of link. Simulation results show that, compared to the frame-based encapsulation method, the proposed method can reduce the packet loss rate of the video data effectively and improve the quality of video service.

Abstract: The advances in the study of three dimensional (3D) interactive visualization techniques in hydraulic engineering are reviewed. Main contents, key technologies and the difficulties with their solutions in the application of 3D interactive visualization techniques to water conservancy works are analyzed and summarized. A true 3D visual simulation system prototype for large-scale water conservancy project was built. A framework for building 3D visual simulation system for complex field data in hydraulic engineering is presented to illustrate potentiality and effectiveness of 3D visualization techniques for hydraulic engineering. Aspects like navigation and presentations of complex field data with spatial dependence are presented.

Abstract: Procedure of constructing cloud computing platform is analyzed at first in the paper. Time and cost management during project execution are taken into account. The execution procedure is optimized and controlled according to critical path of cloud computing project. A case study is discussed and it is verified that time and cost control is helpful to project management in cloud computing platform.

Abstract: Although Application-level multicast is a new multi-point data transmission model, there is no mature and effective scheme for network heterogeneity problem. This paper proposes an agent-based adaptive media multicast system, i.e., the so-called iPALM system (Proxy based Application-level Multicast). It uses efficiently data transmission of IP multicast in LAN, and every IP multicast area sets one agent server named MPN, the backbone network composed of MPNs transmits data using application-level multicast. At the same time, iPALM provides the head format of system protocol, and the definition of transmission message in XML format which demonstrates that iPALM system can satisfy every different application requirement, and improves the media service quality in heterogeneous environment.

Abstract: This paper proposes a mesh deformation method being able to quickly exchange between different editing granularities. The method firstly simplifies the original model mesh to obtain an accuracy-specified control mesh while preserving user’s pre-configured control handle vertices, and then computes the original mesh vertices’ mean value coordinates on the control mesh. Next, uses the Laplacian deformation to deform the control mesh with user’s editing, and then computes the deforming result based on the new control mesh and the previous mean value coordinates. Users can quickly generate a different accuracy control mesh of the new mesh again for deforming with a different granularity. Users only need edit some control vertices, which contains user’s specified handles, so the manipulation is convenient. Experiments show that users can deform models with this method, while changing the granularity fluently and preserving mesh’s features.