Applied Mechanics and Materials Vols. 380-384

Abstract: The cluster system exists as a variety of different machines. There are Nodes with high performance and nodes with lower performance. The distribution of data on each machine and I / O are determined by the equalization of load balancing. According to the traditional way of clustering data distribution, high performance node performance generally can't fulfill full potential. In this way, the lower performance nodes will become bottleneck. To address this issue we carried out some research and propose a High Performance Tiered Replica Distribution (HPRD) a way of the replica data distribution in the cluster storage system. HPRD can fulfill full high-performance nodes potential in the aspect of the performance benefits and high performance nodes can share more high-performance I/O load. Such performance bottleneck will not exist in the lower performance nodes. It can improve the performance of cluster system and the cluster system resource Utilization rate.It also can reduce inefficient use of resources.

Abstract: Following the continual development and maturation of the technology of association analysis, it can be used to mine the relation between spatial data. The paper introduced definition and classification of association analysis technology. It analyses the spatial Association from physics layer, link layer and act layer. Based on above, it provides the process of association analysis about spatial data.

Abstract: Simulation technology is commonly used to study physical systems or imagined systems. Simulation systems can be used to perform what-if analysis on the simulated system, to predict the different results of varying key parameters/estimates or to examine a series of solutions prior to making the final implementation decision. It introduces the integration requirement of simulation test-bed, and the importance of decoupling the simulation component from normal federates is explained. The framework of test-bed which is based on the Data Distribution Service (DDS) model is proposed. A series of experiments to compare the decoupled architecture with a normal one are performed to study the scalability by emulating the simulation process based on the decoupled architecture.

Abstract: The ACP (artificial societies, computational experiments, and parallel execution) method, derived from parallel systems theory, belongs to the research field of meta-synthesis. During the past 10 years after it was proposed, ACP has been applied in transportation, agriculture and economics, demonstrating its advantages. In this paper, ACP is initially proposed to apply in research of space system in the hope that an artificial system can be built for tests, thereby providing guide to construction of real space system. Specifically, modeling of special unit is conducted with the Agent-based approach; high-performance computer is provided for computational experiment; and finally the real-time data published on web is used for parallel execution.

Abstract: It is introducting a system of Laser atmospheric transmission.In order to researching this system, system is modeled by uml.And this system is based on CORBA technology.This paper UML,CORBA technology,design the framework of the system and provide part of the IDL interface.This paper lay the foundation for further study.

Abstract: This paper proposes a method for multi-scale representation of curve and elaborates the process of progressive transmission of curve data over the internet based on this method. Firstly, the importance degree of nodes and the information about public constrain points and monotone chains are stored in a monotonous linear BLG tree structure, and then the multi-scale curve is generated in real time based on this structure and the topological relationship is maintained by an optimized monotone chains intersection algorithm. Finally, the method was used in the experiment of progressive transmission of river network over the internet and verified its effectiveness.

Abstract: Database design is the important part in the ship parallel collaborative system.In this paper, we learn the features of ship parallel collaborative database on the PDM system, raise the theory of ship parallel collaborative design database, describes the application of ship paralllel collaborative database on the PDM system.

Abstract: Failure mode judgment software is widely used in the security control system, it always has higher safety critical level than other softwares. Therefore the testing standards for such software must also be improved. In order to solve the problem of the black box testing for such software, this paper establishment the software fault tree based on the software fault analysis, and use the software fault tree as a test case design tree, then design the test case after obtained the minimal cut sets. Meanwhile, this paper establish the test case design tree for the failure mode misjudgment, and use it as the basis in designing the failure mode misjudgment test cases. We developed the test case assisted design tool based on these methods, and successfully use it in the software testing of the escape software.

Abstract: Recently, several protocols came into being successively to meet the requirement of efficient operations in low-power roaming environment with the fast advance of communication technologies. Unfortunately, these protocols are not a suitable candidate for special requirements in automobile roaming system such as low consumption, high performance and convenience since these protocols pay more attention to a common network environment. In this paper, we address the problem of mutual authentication and key agreement with user anonymity for an automobile roaming system. More specifically, we propose the protocol employs elliptic curve cryptography system to enhance operational efficiency and take into account common attacks and give corresponding resist measures to ensure security. The analysis shows our scheme is user friendly and secure.

Abstract: in order to study the development of the Windows Azure platform, the paper through the use of cloud computing, one of the platforms Windows Azure, using its Table Storage storage services,to realize a message board function; and realize a good combination of NET Framework and Windows Azure, and explore the Difference of the Microsoft Windows Azure cloud computing platform development and the difference between ordinary ASP.NET development.