Applied Mechanics and Materials Vols. 121-126

Abstract: Service composition is an emerging way to provide the value-added service. For most existing composition results are rather unstructured and flat, it is very difficult to reuse them. In this paper, we propose two kinds patterns to construct the hierarchy of the composition. This method can not only improve the abstract level of the composition results, but also can promote their reusability. The experiment results and analysis show it is effective.

Abstract: The notion of intuitionistic fuzzy sets with parameters (IFSP) is first introduced in this paper. Compared with conventional intuitionistic fuzzy sets (IFS), IFSP can improve the recognition accuracy when it is applied to pattern recognition. By analyzing the degree of hesitancy, this paper concentrates on the construction and application of intuitionistic fuzzy sets with double parameters (IFSDP). Finally, a pattern recognition example applied to automatic control system is given to demonstrate the application of IFSDP. The simulation results show that the method of IFSDP is more comprehensive and flexible than that of the traditional intuitionistic fuzzy sets.

Abstract: The method to investigation the changes of optical properties and evaluating the effect of laser application in real time is presented in this paper. In vivo measurements of the reduced scattering coefficient (μ’s) and tissue temperature (T) were performed with a functional near infrared spectroscopy (fNIRS) system and a temperature measurement system during LITT. Mice liver tumors were examined in vivo in different laser doses (0.8W, 1.0W, 1.2W, 1.4W) at a certain heating time (600s). The results showed that there were the same rising tendencies of the reduced scattering coefficient and temperature during LITT. They increased quickly at the beginning, gradually reached a stable state, and rose faster when the laser power was greater. When the tissue temperature was in the range of 50°C to 70°C, there was a clear linear relationship between μ’s and T. The linear equation was obtained for the first time.

Abstract: The IT performance evaluation is a complex analysis system. Some key factors that can reflect the essential characteristics and be easy to acquire, should be extracted to help us to clarify evaluation, analysis and diagnoses. In this paper for the uncertainty of IT performance data, an algorithm of IT performance key factors extraction based on selective ensemble of principal component analysis (PCA) is proposed. Unlike the traditional PCA algorithm, PCA selective ensemble increase the difference degree between the main component and the others. Moreover it expands the selective ensemble in the application of unsupervised algorithm. The validity of the algorithm is verified through the analysis of the actual data.

Abstract: Let be a simple connected graph containing a perfect matching. For a positive integer , , is said to be bipartite matching extendable if every bipartite matching of with is included in a perfect matching of . In this paper, we show that bipartite matching extendability of some special graphs.

Abstract: To achieve lightweight network collaborative modeling on the client, this paper designs the collaborative modeling architecture based on B/S structure. Considering the product CAD model information can’t be shared on the network, the XML technology is applied to build the middle model expression format which converts the CAD model to the middle model that can be shared among collaborative clients on the network. To solve the problem that the middle model is too huge to transmit on the limited internet bandwidth, the face representation method based on loops is proposed. With this method, the size of the middle model shared on the network can be reduced greatly. The structure of bidirectional inquiring between the feature information and the geometric element information is established in geometric models, and the problem that how to get modified features, topology relationship and geometric elements after design models have been changed is solved.

Abstract: Based on Visual C + + and OpenGL technology, an interactive realistic graphics visualization system is researched and developed, which has STL 3D-model modeling, realistic graphics rendering and mouse-based interaction function. The key technologies such as STL 3D-model modeling, realistic graphics render and interaction are researched.

Abstract: The implementation platforms of parallel genetic algorithms (PGAs) include high performance computer, cluster and Grid. Contrast with the traditional platform, a Master-slave PGA based on MapReduce (MMRPGA) of cloud computing platform was proposed. Cloud computing is a new computer platform, suites for larger-scale computing and is low cost. At first, describes the design of MMRPGA, in which the whole evolution is controlled by Master and the fitness computing is assigned to Slaves; then deduces the theoretical speed-up of MMRPGA; at last, implements MMRPGA on Hadoop and compares the speed-up with traditional genetic algorithm, the experiment result shows MMRPGA can achieve slightly lower linear speed-up with Mapper’s number.

Abstract: An apparatus for in situ measuring the hysteresis of magnetic materials by using pulsed magnetic field is structured. The samples were locally magnetized to saturation by the pulsed magnetic field. The pulsed field is generated by the discharge of a capacitor over the magnetizing coil. The measurement has been developed in LabView environment using National Instrument Data Acquisition Cards. The hysteresis loops of Q235 steel samples under various compressive stresses are presented.

Abstract: An Monitor& Diagnosis Support System for Nuclear Power Plants (NPPMDS) is developed in the embedded real-time operation system VxWorks in this paper. NPPMCS includes data collection and validation unit, operation monitoring unit, fault diagnosis unit, alarm analysis unit, operation procedures and Human-machine interface and so on. The paper introduces the design and implementation of NPPMDS including the structure of the NPPMDS and the main function units. In order to confirm the validity of this system, the SGTR simulation experiment was carried out on a full scale simulator of nuclear power plants. The experimental results show that the system provides operation support, the load and pressure for the workers can be reduced and the safety of nuclear power plants can be enhanced.