Applied Mechanics and Materials Vols. 155-156

Abstract: Nonsubsampled contourlet transform (NSCT) provides flexible multiresolution, anisotropy, and directional expansion for images. When the NSCT is introduced to image fusion, more information for fusion can be obtained and the impacts of mis-registration on the fused results can also be reduced effectively. Therefore, the NSCT is more suitable for image fusion. Based on NSCT and adaptive Genetic Algorithm (AGA), this paper proposes a new adaptive fusion method. This method can optimize decomposition level of the NSCT, lowpass subband coefficients and bandpass directional subband coefficients of the fused image. Finally, the algorithm is tested and compared with existing algorithms. The results show that the algorithm can produce high-quality fused images rapidly.

Abstract: Though SLS technology have got well development, the strength of the sintering prototype parts still need a lot of research. The lower strength of prototype parts mightl seriously affect the quality. The past research result shows that intensity of coated sand specimens of SLS sintering method is lower and cannot be used for metal casting, the sintered parts must be post-processed. In this study, author used the coated sand casting as the material of selective laser sintering experiment, studied the processing temperature and time on the mechanical properties of post-processing, and the influence on gas-forming property and collapsibility of the pieces. And combined with casting experimental to analyze the accuracy influence factors of precoated sand sintering parts and other performance assessment. Through the above analysis, we concluded that the influence law the post-processing of temperature on tensile strength of coated sand specimens under three different insulation temperature conditions.

Abstract: To improve the service performance of roller. The surface of roller was alloyed by a 5kW CO2 laser. The effect of CeO2 on microstructure and hardness was studied by means of OM, Micro-hardness Testing Machine and Rockwell hardness tester. The results indicate that addition of CeO2 into coating materials can enhance the fluidity of molten liquid, refine and purify microstructure and increase microhardness and surface hardness of alloying coating.

Abstract: Coupled molecular dynamics simulation and finite element method, a multiscale method is used to model nanoscale sliding contacts problems. According to an experimental sample, 4 textured surfaces with different asperity shapes are designed. Through the friction forces comparisons between smooth surface and textured surfaces, the effects of texture shapes are investigated, and 2 better textured surfaces are discovered to reduce friction forces.

Abstract: Engineering materials suppliers' selections directly affect the quality of the construction and economic benefits. Based on the basic principles and methods of the value engineering theory, this paper discussed the application method and basic steps of the value engineering in engineering material supplier optimization program. Combined with practical engineering, the optimal scheme of concrete material supplier is an example. The results showed that, using the basic method of the value engineering theory, through the function evaluation, cost evaluation and value evaluation coefficient calculation, can determine the optiaml material supplier and provide scientific and reasonable basis.

Abstract: Through adopting many research methods, such as literature, experimentation, questionnairesand mathematical statistics method, this study explores the effect of sports multimedia teaching on stimulating the college students’ sports motivation, makes comparison between multimedia teaching and traditional teaching in the EC course teaching, and makes use of sports motivation scale to make measurement. The research result shows that the sports motivation level of the students in the experimental class who are adopted multimedia teaching method to teach is significantly improved, and has significant difference with the control group who are adopted the traditional teaching approach. In physical education, the adoption of multi-media teaching can motivate and improve the sports motivation of the students, so the multimedia communication materials should be promoted in physical education.

Abstract: With the rapid development of multimedia technology, the comprehensive materials multimedia has become the development trend of college classroom. This paper starts from the analysis on the difficult points of college English classroom, takes the college non-major classroom as the research subject, compares the traditional teaching with comprehensive materials multimedia and makes empirical research, and then purposes the corresponding countermeasures and suggestions, so as to provide scientific basis for the development of comprehensive materials multimedia English classroom at this college.

Abstract: The paper briefly summarizes the application of composite materials on various sports equipments, especially the specific application on table tennis bats and tables. The paper explains the good properties of composite materials shown in the table tennis bat in detail through a data analysis. It has an important significance on the improvement of table tennis. Through table tennis, the paper shows the wide and profound application of composite materials in the field of sports equipments.

Abstract: Different Mg-Al layered double hydroxide (LDH) nanomaterials had been synthesized using anion surfactant in the solution of mixed solvents. Using sodium dodecylbenzenesulfonate (SDBS) as morphology-controlling agent, different morphologies of Mg-Al LDHs are obtained successfully. The concentration of the reactant and the dosage of SDBS had significant effects on the morphology of the products. The morphologies of flower-like spheres, nanospheres, and micro-particles were efficiently obtained, respectively. X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize these products.

Abstract: The state council about speeding up the development of tourism opinion clearly put to greatly promote the tourism industry of energy saving and emission reduction, five years to star hotel, A level scenic area water electricity consumption by 20%. This has long been called is low carbon industry for tourism, facing a great challenge. This paper by analyzing think though tourism is low carbon industry, still has certain reduction space, can from the government and industry management department, tourism management department, tourists in such aspects as take effective measures to achieve a low carbon tourism, promote energy conservation and environmental protection.