Advanced Materials Research Vols. 403-408

Abstract: Research and analysis on the different Turbo decode principles, a simple、 rapid and effect implementation approach is found in this paper and implemented in the TMS320C64xDSP. The running results of the Turbo decode program in CCS3.3 verify that the program is feasible and effective.

Abstract: This paper aims to provide a comprehensive evaluation system of green ICT products, in order to help improve ICT product innovation. Firstly, the impacts that ICT products have brought to the environment and society are analyzed. Secondly, based on the previous research on the green product evaluation system, and with the consideration of characteristics of ICT products, a framework of the evaluation system is established by selecting indicators covering three criteria---- environmental impact, technological utility and human pleasure. And then fuzzy analytical hierarchy process is used to quantify and normalize qualitative indicators and calculate the weights of criteria and indicators. Finally, the evaluation system is applied to a home computer as an example to verify the validity of it.

Abstract: Lane detection is a key technique for intelligent vehicle driving. Aiming at the detection performance of existing lane detection algorithms, based on least square fitting, we propose a lane detection algorithm for structural road. The lane videos are gotten by the monocular camera installed in the car. Image preprocessing is applied to improve image contrast and then the image is segmented by improved Otsu. At last, the current lanes are extracted and equations are rebuilt by the least square fitting. The experiment results show that the proposed method has better accuracy and robustness compared to existing lane detection algorithms.

Abstract: A novel method was presented to measure the motion of the heart with the whisker sensor in robotic assisted beating cardiac surgery. The whisker sensor is a flexible, high-precision，low stiffness contact sensor designed for real-time accurate measuring heart motion. The sensor tip can be in continuous contact with the surface of the heart, which can actively cancel the relative motion between the surgical instruments and the surgical site on the beating heart. The proposed highly sensitive sensor employs a linear position sensor connected to two flexible cantilever beams that are attached orthogonally with a ridged joint. The theoretical formula was derived from the mechanical model which established based on the classical mechanics of materials．Finally，finite-element simulations were done with the ANSYS to prove the feasibility and validity of the method.

Abstract: Aim of the paper is to present some collected facts for the re-invention of machine vision as green vision with smartphones. It is noteworthy that smartphones have not only a fundamental influence on machine vision itself but also on science, education and training in the fields concerned. Smartphones make machine vision green and convenient and reliable and affordable with just enough and easy-to-use apps.

Abstract: This paper presents a general simulation method for sheet metal incremental forming(ISF). Firstly, a three-dimensional finite element model based on Dynaform was developed to simulate the process. The tool path during the process simulation was directly defined by numerical control (NC) code and so identical with that in operation. Then, the results of numerical simulations with different process parameters, such as tool diameter, depth increment and wall angle, were discussed in details. The simulations reveal that with the decreasing depth step, increasing tool diameter and wall inclination angle, the axial stress reduces and leads to thinning reduction and more uniform thickness distribution. In addition, as the definition of the tool path was in accord with the genuine motion trajectory of the tool, the results deduced from this model may be more precise compared with those from other previously simplified models.

Abstract: In order to analyze the effect of asymmetry of phase-shift transformer on 12-pulse ac-dc converter, this paper sets up a decoupling model of delta-connected autotransformer. Via analyzing coupling circuit of autotransformer, the relation among branch voltage, branch current, node voltage and node current is built, and base on the relation, an admittance matrix containing the information about the connection way and electrical quantities is concluded. Utilizing the matrix, the proposed model is established. Simulation and experimental results show the validity of the model when simulating the asymmetry of delta-connected transformer

Abstract: According to the market demand trend, design the automobile redirector 3 dimensional parametric system. the system developed under the new parts of the design features step-oriented modules, including several major functions such as three-dimensional model showed the size of the design. The core size of the design uses a Visual Basic module called SolidWorks API functions to drive the part model, in order to complete the model and revision. This paper describes the overall system development process, including the core driver code for a typical part. Using three-dimensional parametric steering system can quickly develop a high quality steering parts, to meet changing market needs with efficient, practical features, this method is gradually used, it is a development potential of CAD / CAM technology.

Abstract: Research and development (R&D) project termination decision is an important and challenging task for organizations with R&D project management .Current research on R&D project management mainly focuses on project selection decisions. Very little research has been done on the termination decision of R&D projects .In this paper a support vector machines classifer for assisting managers in deciding whether to abandon an ongoing R&D project at various stages of R&D is presented. It has also shown by the modeling and pattern recognizing results in terms of termination decisions of fifty R&D projects that the method possesses reinforcement learning properties and universalized capabilities. With respect to modeling and termination decision of R&D project, which has the fact that the evaluation criteria are hardly ever determined by conventional approaches such as statistical analysis, the method is available.

Abstract: Heterogeneous data sharing is always a bottleneck problem for the development of collaborative design. The method of STEP/XML element mapping achieves the data transformation between STEP and XML by establishing the mapping relationship of the two data. It’s hard to ensure all element mapping one to one and easy to cause the partial data loss. Based on the research, this paper put forward a new method with data encapsulation. It encapsulates the whole STEP data into the XML data by using of the XML character data, and then the data are uploaded to the collaborative design platform. Another designer can download it and get the original STEP data by using the XML parser. This method is not only easy to be realized, but also can ensure the integrity of the product model data conversion. It is more conducive to achieve collaborative design.