Advanced Materials Research Vol. 950

Abstract: The Al₂M₃Y(M=Cu, Ni) compound was synthesized by arc melting under argon atmosphere. The high-quality powder X-ray diffraction data of Al₂M₃Y have been presented. The refinement of the X-ray diffraction patterns for the Al₂M₃Y compound show that the Al₂M₃Y has hexagonal structure, space group P6/mmm (No.191), with a = b = 5.1618(2) Å, c = 4.1434(1) Å, V = 95.6 ų, Z = 1, ڑ_x = 5.7922 g/cm³ , F₃₀ = 155.5(0.0057, 34), RIR = 2.31 for Al₂Cu₃Y, and with a = b = 5.0399(1) Å, c = 4.0726(1) Å, V = 89.59 ų, Z = 1, ڑ_x = 5.9118 g/cm³, F₃₀ = 135.7(0.0072, 30), RIR = 2.54 for Al₂Ni₃Y.

Abstract: Crystal structure and X-ray powder diffraction data for the Al₇Cu₅Y ternary compound are presented. The compound crystallizes in the body-centered tetragonal with the Al₇Fe₅Y structure type (space group I4/mmm), the lattice parameters a = 8.6960(9) Å, c = 5.1256(7) Å, V =387.62 ų, Z =2, ڑ_x =5.102 g/cm³, F₃₀ = 275.5(0.0033, 33) and RIR =1.23.

Abstract: The aim of this study was to investigate the water effects on the scales behavior through experiments and observation by SFM and AFM. For this purpose, a detailed investigation on the role of water, PH, and treat time were investigated. After this, a model was built to discuss the swelling and upward of the wet scales. For the scales is the element factor for shrinking, so this study is of great significance to the work of shrinkproofing.

Abstract: Digital image technology – based computer aided design for asphalt concrete is a new direction of asphalt pavement research. This paper focuses on description of research progress achieved by the author’s research institute in the direction, mainly including two-dimensional digital image technology – based research in the internal structure and volume of asphalt concrete, industrial CT-based identification of different substances in the asphalt concrete and acquisition of morphological characteristics for coarse aggregate and three-dimensional digital image technology – based virtual reconstruction of asphalt concrete and simple mechanical behavior simulation.

Abstract: The unique design for a novel 3-DOF hybrid mechanism is investigated in this paper. According to the feature of the hybrid mechanism, its kinematics is resolved in detail. And the shape of the workspace is described, which can provide theoretical base for the optimal design and application of the mechanism. This novel 3-DOF hybrid mechanism is suitable for the industrial, agriculture and service applications in which the requirements for simple structure, high stiffness, and large workspace.

Abstract: The aim of this study was to investigate the ozone treating effects on wool scales and wool mechanical property through experiments and observation. For this purpose, a detailed investigation on the role of mechanical properties surfacing topography, changes in component and membrane structure were investigated. After this, a micro explanation was given to discuss the mechanism of wool shrinkage. For the scales is the element factor for shrinking, so this study is of great significance to the work of shrinkproofing.

Abstract: By representing the uncertain parameters as interval numbers, the static linear interval equations about the structural system were obtained in this paper by means of the finite element method. These equations are linear interval equations, for which some solution methods were discussed and a step-dividing method was presented. In this method, the independent uncertain parameters were given the discrete values within each interval, and the linear interval equations were changed into the corresponding certain ones. And then the boundaries of every interval solution components are determined by searching for the maximum and minimum values of the equation solutions. Some mathematical examples were used to examine the correctness and efficiency of the algorithm and which was applied to static interval analysis of engineering problems. Compared with other methods, the calculation results show that the algorithm of this paper is efficient and accurate.

Abstract: The thesis presents a reconstruction of bottom surface of shoe last based on foot pressure distribution in order to relieve the influence caused by plantar pressure concentration. First, in order to match the plantar pressure data and the shoe last data, the shoe last data is processed to locate the center location of the heel, the sole and the big feet thumb. Then the pressure data is also processed to extract the corresponding data which is interpolated and fitted of the area of the heel, the sole and the big feet thumb. and then the establish area of bottom surface is determined depending on the pressure data of three area. Finally, based on the extracted pressure data and the convex-concave coefficient of pressure data, the reconstruction of bottom surface of shoe last is achieved.

Abstract: Hammer throw is one of the traditional track and field events but it only has a short history in China. Chinese hammer athlete Shizhu Wang won the championship of China Long Throw Open in 2013, but the performance in the game has a big gap with the world record. In order to improve the techniques of Chinese men hammer athletes, have a clearly understanding of the rational factors and internal relations of hammer throw technique, enrich the theory of the action and provide reference to the hammer throw training, we made a 3D camera resolution on the top three men hammer throwers (Shizhu Wang, Dakai Qi and Xiwan Jiang) at the game site of China Long Throw Open in 2013, with the three-dimensional analysis we gained the kinematic parameters. We made a comparison on the parameters between Chinese and foreign elite men hammer throwers. The result shows that: Compared with the datas of outstanding foreign athletes, the pre-swing time is much larger and hammer velocity increment is much smaller in the pre-swing stage; the total rotation time is much longer, and the single to double supporting time is distributed unreasonly, what’s more, the change between the knee joint and bevel angle are too small; the shot speed ,with the fastest Shizhu Wang of 24.87 m/s, is much slower than that of foreign famous athlete Sedych (30.7 m /s), and longer hammer throw running time, which are the main reasons that affect athletes’ performance.

Abstract: The parallel bars is one of the advantage projects of the Chinese men's gymnastics teams. The basket with full turn to handstand on parallel bars belongs to the high F group action, which is an important mean to obtain a higher difficult point, and requires a higher technology. We shot Zhang Chenglong’s (who won the champion in 2012 China Gymnastics Championship) action. The kinematics rule and technique characteristics revealed by the analysis of the action provided reference for the training of coaches and athletes.