Advanced Materials Research Vols. 468-471

Abstract: With the view of the phenomenon that different test modules have significant differences in the assembly test system, and there is some dependence between these modules, through the dependence theory of the parallel technology, there is the possibility of parallelization used in the integrated test system. In this paper, we analyses various control flows of each program or relation between the modules, and then gets all kinds of dependency between these modules, at the same time transforms the dependency into control flow graph, lastly gets the dependency of actual test cases. On this basis, according to the former implementation plan in parallel research, we can arrange parallel orders of modules the integrated test system, it can effectively improve the efficiency of software testing, and greatly saves the test time.

Abstract: A quadratic trigonometric B-spline curve analogous to the standard quadratic uniform B-spline curve, with a shape parameter, is presented in this work. The shape of the proposed curve can be adjusted by altering the value of the shape parameter while the control polygon is kept unchanged. With the shape parameter, the quadratic trigonometric B-spline curve can be closer to given polygon than the standard quadratic uniform B-spline curve. The proposed curve can be used to accurately represent the ellipse.

Abstract: This study reports the petrological characteristics and zircon geochronology based on laser ablation ICP mass spectrometry. Zircons extracted from granodiorite porphyry display oscillatory zoning that suggests magmatic crystallization with the ratios of Th/U (0.34~1.20). The zircons yield early cretaceous 206Pb/238U age of (141.0±1.7) Ma that constrains the approximate timing of formation of the granodiorite porphyry. Inherited zircons yield 206Pb/238U age of (490±24) Ma and (556±27) Ma, and 207Pb/206Pb age of (2444±21) Ma implying that the granodiorite porphyry was sourced from middle and lower crust possibly.

Abstract: In content-based image retrieval technology,color has been widely used as a kind of important image visual information.Compared with the geometrical character of image, color has certain stability and strong robustness to zoom, parallel move and rotate.Currently there are a lot of image retrieval technologies which own their own limitations.This paper puts forward an image retrieval method based on color and location,which is available for mobile platform.This paper adopts a histogram method in color characteristics and uses block color method to solve the color space distribution.Combined with the location-based service(LBS),this method can effectively improve the performance of image retrieval on the mobile platform.

Abstract: Imidazoline quaternary ammonium salt (IM) was synthesized in this paper by maize oil, 2-(aminoethylamino) ethanol and benzyl chloride. Then it was modified by urea and thiourea to obtain IM-O and IM-S respectively. The products were analyzed with IR spectrum and 1HNMR spectrum. The corrosion inhibition performance of IM-O and IM-S was evaluated by weight-loss measurement of A3 steel in hydrochloric acid. The compare research in the concentrations of the corrosion inhibitor, the concentrations of hydrochloric acid, the temperature of pickling, the time of pickling and the concentrations of Fe3+ were done. The results show that the two compounds are good inhibitors for A3 steel and the IM-O has stronger corrosion inhibiting ability than IM-S.

Abstract: This paper designed and developed an integrated testing system for performance parameters of the Hydraulic excavator. Combined with sensing technology, computer technology and virtual instrument technology this system can detect six key parameters of the excavator including motor speed, hydraulic system pressure, attachment action time, swing speed, walking speed, current characteristics, so as to evaluate the performance of the excavator. The testing system takes full consideration of the interaction between the tester and driver, meanwhile, can automatically detect all parameters by using the parallel test method in order to make sure the whole test completed in one hour. As the testing system is designed base on the idea of modularization, it can add new modules to meet the functional requirements alone with the development of research in the future. This testing system can not only improve the test efficiency, but also be used as analysis tools for the research and optimization of performance parameters of excavators.

Abstract: The objective of this study is to optimize the micro drilling of PMMA (Polymethyl methacrylate) polymer with multiple performance characteristics. In Taguchi method, a three level orthogonal array has been used to determine the S/N ratio. Analysis of variance was used to determine the most significant process parameters affecting the holes roughness. Coated deposition, spindle speed and feed rate are optimized drilling parameters when the performance characteristics, which include tool life and surface roughness, are taken into consideration. The results indicated that the TiAlN-coating drills generate least wear and best holes quality. Finally, confirmation experiments were conducted to confirm the validity of the results.

Abstract: In this paper, a comprehensive numerical investigation is presented on the behaviour of ceramsite light aggregate concrete(CLAC) beam by the non-linear finite element method. The investigation includes the entire process of the beam from loading to failure. Numerical analysis results show that the flexural behavior of CLAC beam is obtained by numerical simulation,including load-deflection curve, cross section stress and crack development ect. Numerical simulation may replace the actual experiment for study on flexural behavior of CLAC beam.

Abstract: Abstract. The thermodynamic model of an aeroengine was established. The laboratory working condition of the fuel controller, fuel flow proportioner and low-pressure fuel-feed system of an aero-engine were built. The mathematic model of the aeroengine was run in the computer. Using RS422 Bus technology, the semi-physical simulation experiment system of the fuel control system for the aeroengine was established with engine model. And then the experiment results demonstrate that the semi-physical simulation experiment system can simulate the transient state and steady state for the aero-engine effectively. These results lay a solid foundation in the further research of the FADEC system for engine and the application of advanced control theory to control system of engine.

Abstract: This article introduced the development of sports enterprise in China’s Ethnic Minority Region, summarized the significance of its development and analyzed the problems along its development, such as insufficient awareness of local government towards sports enterprise; still weak foundation of sports facilities; restriction to the further development due to its unique natural and geographical conditions and so on. It further put forward the developing strategies of succeeding the road of combining innovation and development, increasing investment constantly, accelerating the implementation of “Peasants Sports Fitness Project” and strengthening the development of minority sports resources to promote a better development of sports in minority nationality regions.