Advanced Materials Research Vols. 468-471

Abstract: The mechanical properties of a magneto rheological (MR) fluid in tension and shearing have been studied in the magnetic field which is generated by a coil carrying different magnitudes of DC electrical current. An experiment setup was designed and fabricated to perform this operation. The magnetic behavior of the equipment was analyzed using software of ANSYS/Multiphysics. The shear yield stress represents the effect of the interaction force along the shear direction (perpendicular to the direction of the magnetic field). The tensile yield stress of MR fluids represents the effect of the interaction force between the polarized particles along the direction of the applied magnetic field. The shearing tests showed that the shear yield stress is proportional to the external magnetic flux density with an exponent of 1.19. The tensile yield stress is about four times of shear yield stress.

Abstract: Based on the analyzing of the characteristics of a Body-In-White pressing production process a pressing workshop production management system has been given in order to make the ERP production scheduling more executable. The detailed function model of it such as task assignment, quality control, mold maintenance and production scheduling has been thoroughly discussed. In order to make the production line capability balance the task dispatching algorithm has been given and the dynamic dispatching and controlling process has been explained. This system can be integrated with the upper ERP/CAPP/PDM system which can improve the information level of a company.

Abstract: A method for nearly orthogonal grid generation is presented in this study. The generating system is based on solution of a system of partial differential equations with finite difference discretization. The grid quality control functions and grid properties are investigated. Specification of both boundary point distribution on all sides is used. The proposed method is applied to various test problems，which shows this method provides a good balance between controlling grid orthogonality and cell aspect ratio.

Abstract: To improve the productivity of HMI development, this paper proposes an intelligent development method for human-machine interface of CNC according to software reuse theory, of which the core technology consists of configurable intelligent development framework for HMI and functional component library. For the development framework, it includes customized interface editing environment, middle-layer model and automatic code generation engine. As to the design of functional component library, component object model (COM) is used to create various components which can be classified into graphic primitive components, CNC system function components, interpreter components and so on. By use of the component interface, development framework communicates with the above mentioned component and is responsible for the assembly and integration of components through which the complex HMI system is automatically generated. Based on the intelligent method, developers can realize the automatic development of human-machine interface, which will ensure product quality and improve the development efficiency.

Abstract: In this paper, the MIMU( MEMS Inertial Measurement Unit) was used to detect the attitude angle of the two-wheeled robot. By Kalman filter, the optimal estimation of attitude angle was gotten, and which was applied to the balance controlling. In this system, FPGA is chosen as processor, and the embedded kernel was built up based on SOPC. Furthermore, the software of multiple sensors fusion has been developed. The experiment indicates that the design of this robot system is reasonable, and the Kalman filter algorithm can improve the precision of controlling effectively.

Abstract: Since 2005 when Carbon Fund was formally introduced to China, the development of projects under the clean development mechanism(CDM) has experienced enormous growth,contributing to the sustainable development of industry.While there are at least two general barriers to get a balanced development of CDM projects in China—namely the limitation of implementation of CDM projects both in sector and scale spheres and problems faced by enterprises in development of CDM project —for assessment of the applicability of project methodology，this article compares the national Chinese registered projects and corresponding methodologies in the world.In the end,My analysis argues the underlying reasons and proposes several schemes to solve the problems.

Abstract: The tens of micrometers sized polystyrene(PS) microspheres were produced by dispersion polymerization in ethanol/H2O medium with poly(N-vinyl pyrrolidone) (PVP) as a dispersant and 2,2’-azobisisobutyronitrile(AIBN) as a radical initiator. The effects of PVP concentration and ethanol/H2O ratio on particle size and size distribution of PS microspheres were studied extensively. It was found that polystyrene microspheres with diameter 10-50μm were produced with 30wt% of St, 4wt% of AIBN, 3wt% of PVP and 97.5/2.5 ratio of ethanol/H2O, and narrow distribution of microspheres can be achieved by screening.

Abstract: This paper studies the moving objects detect and shadow eliminate in video surveillance. Completed the background generated on the video image by study the mixed Gaussian background model, by transforming the image to hsv color space for processing, which achieve the elimination of shadows. The experimental results show the approach this paper use is effectively on the background generated and shadow remove.

Abstract: In this paper, it probes into the basic characteristics of the relationship between water and city persons, aims at the widespread existing hydrology and ecosystem problems in urbanized regions and the city residents’ environmental protection concepts. Finally, it calls on to control the city hydrology ecosystem system, achieve the sustainable development of socio-economic and water resource, create more fine living space for the city residents.

Abstract: This paper introduces the preparation method of large scale free P+ diaphragm based on the boron doped and anisotropic wet etching techniques. It also explores the impact of the RF power configuration, pressure and SF6 flow rate on etching rate during ICP etching. It is indicated that silicon can be used as mask to solve the problems of large scale film break and the adhesion between mask and film which are caused by vacuumization during ICP etching. In order to avoid over etching, twice etching technique can be employed to control etching time and end point. Results of the experiment show that through etching, free P+ diaphragm can be fabricated into sensitive free beam which can be widely used in MEMS.