Applied Mechanics and Materials Vols. 121-126

Abstract: Hydraulic moving system has been extensively applied in small type of loader and other engineering vehicles do to its special superority, how to forecast its dynamic behavior in design stage is most impotant problem. This paper firstly analyse a typical moving hydraulic system of multi-functional loader, and construct its powder bond graphs model and encapsulate these key parts model in soft Mworks. at last, a simpled moving hydraulic dynamaic simulation model was constructed by these components, and some characteristic curves of system can be easily abtained.

Abstract: To decrease cost, semiconductor manufacturing companies always aim for yield enhancement. The analysis of Wafer Bin Maps (WBMs) is important for yield improvement. Real data sets are collected from a famous semiconductor manufacturing company to verify the presented method. Four types of WBMs patterns, center, edge, local, and ring types are selected for verification. Experimental results showed that with adequate parameter settings, the method can successfully recognize the pattern types and distinguish between random and systematic WBMs. There were 17 testing samples, and 16 of them were recognized correctly. The accuracy was 94.12%.

Abstract: In this study, we propose the production and marketing planning of decentralized supply chain with capacitated constraint in a single-retailer Stackelberg and a single-manufacturer under VMI and consignment agreements. The study formulates the mathematics-based profit-maximization model and develops the solution procedures under collaborative and non-collaborative programs over a multi-period planning horizon. The analysis reveals that the benefit generated from collaborative program can significantly achieve channel-wide profit improvements.

Abstract: Because of the different influencing factors, the defective market of regional brand would be contrary to Akerlof adverse selection model, it will still exist. Therefore, this paper establishes the consumer incentive model and local government regulation model. Models shows: Defective market will gradually revert to genuine market by raising prices, improving product information penetration, increasing penalties and reducing inspection costs. Using the adulteration scandal about Wuchang "rice flower" as a case sample enhances the credibility of theoretical research findings.

Abstract: In order to implement the surface painting automation of irregular components of reproducing cartridge, a painting robot manipulator with four degrees of freedom is carried out in this paper. Kinematics forward problem and inverse problem of the manipulator are firstly formulated and then painting trajectory is described by adopting the structure of endpoints and line-style. Furthermore, painting trajectory is generated in both joint space and Cartesian space according to robot’s trajectory planning principle.

Abstract: Based on the artificial neural network, the parameters of a steel truss are identified. And the finite element model of truss is corrected. In order to improve the efficiency of model updating by artificial neural networks, the momentum is introduced into the back propagation algorithm. Based on the theory of probability and mathematical statistics, the expectation confidence interval of the measured deflections and strains is obtained. In this way, the samples to train the neural network are optimized. The numerical results show that the back propagation neural network proposed on this paper is able to correct the finite element model of the truss effectively.

Abstract: In this research work, ProCAST software is employed to study the sand casting process of a box-type part for wind turbine. The casting part is big in size, non-uniform in wall thickness, and heavy in some local positions. Shrinkage cavity and porosity are very likely to from at these locations. By numerical simulation, the influence of the parameters such as pouring temperature, chills, riser on mold filling and solidification is analyzed. Simulation researches reveal that with appropriate pouring temperature, correct number, size and location of chills and risers, a smooth mold filling, reduced shrinkage and other defects are available and desired sound castings can be produced.

Abstract: When adopting the air-liquid and air-liquid-mechanical composite transmission technology, the comparative advantages of various transmission techniques can be played, while their shortcomings can be avoided. The efficient fixture and press with double-station based on these composite transmission technology are introduced, and their working principles and mechanical formulas are given out. The innovative design of the fixture and press with double station can achieve the two station order-processing operations when only using one drive cylinder, which have high efficiency, the large output force, and will not pollute the environment.

Abstract: Ergonomics is the study of the job, equipment and workplace in order to make them suitable and convenient to the workers. At an appliance manufacturing company the ergonomic rating of a worker’s hands and arms movement was higher above the desired value. Moreover, there were accidents that occurred on these lines sometimes. This paper analyzed the current scenario and developed a new design carried out on manufacturing Line 1 and Line 2 at that company to make the platform and jig more ergonomic to the operators.

Abstract: In this paper, some technologys are measured and studied with good applicability and reliability,such as static loading test technology,in situ sampling technology,shear wave velocity test technology,GPR testing technology,low strain dynamic testing and settlement observation technology. It can be popularized in engineering.