Advanced Materials Research Vol. 842

Abstract: Realistic graphics for virtual reality system has been a hot research at home and abroad, the illumination model mapping and its application of the algorithms is one of the key level to achieve realistic scenes. This paper introduced the illumination model mapping and classification of the algorithms, focused on ray tracing algorithms and bounding box technology of the global illumination model which were realized in the oilfield virtual reality system and have been achieved good results.

Abstract: According to the space equal features of midpoint segmentation KD-tree, anisotropic quantitative method is proposed. After having used this method, the coordinate figures of sampling points in point model were quantified again; and the quantitative results have been represented as encoding of space partition methods and results in the process of constructing KD-tree. Meantime, the effectiveness that the method was used to express point model have been simulated and studied. It turned out that the quantitative method is very suitable for large flat area, because it is not only directly reduce the amount of point model geometry data, but also greatly reduce sampling points in case of keeping the numerical precision of the model geometry data unchanged, so as to further reduce the amount of point model data.

Abstract: As the fast development of social economics, pollution accidents become more and more frequent. Yangtze estuary wetland is an important nature reserve. Evaluation of water quality becomes important in this area. However, evaluating water quality needs to concern many criteria such as chemical oxygen demand and content of harmful elements. Simply implement of criteria can cause bad results. This paper use Back propagation (BP) neural network to evaluate seawater quality of Chinese sturgeon reserve of the Yangtze estuary wetland in Spawning season successfully and calculate the quantities of floating animals and plants. The analysis also set up good mechanism of seawater quality evaluation.

Abstract: The direct digital frequency synthesizing technology is one of the main area for frequency synthesizing technology. This paper proposed an output shift keying (OSK) digital circuit design for a 14-bit 2.5GSPS RF-DDS, which can support two modes: manual OSK and automatic OSK. Simulation verification and test results both show the OSK circuit design can support amplitude modulation.

Abstract: Synthetic aperture radar (SAR) images are inherently affected by multiplicative speckle noise. The presence of speckle damages radiometric resolution, at the same time, it hampers the human interpretation and scene analysis for SAR images. On the base of studying and analyzing the mathematical model of the bilateral filter, the paper proposed a modified adaptive bilateral filter (MABF). First, it separates non-independent two-dimensional Gaussian filter into two independent one-dimensional Gaussian filter, which improves the operation speed greatly. Then through the effective noise parameter estimation, it adaptively selects optimal parameters, which improves the filtering effect. The real SAR image data is used to test the presented method and the experimental results verify that MABF is feasible and effective.

Abstract: According to sports injuries knowledge and theory,combine module theory and Internet technology designed sports injuries network consultation system.This paper makes explanation on design ideas,technology crucial,module and function design,working example of the system.This system can appraisal sports injuries,give treating plan,exercise and rehabilitation prescription,and provide Internet platform for sports injuries treating and counseling of students and teachers.So the system has important practice and promotion values.

Abstract: Based on the finished project on the net course of collegiate physical education, author discussed the considerations in designing and developing the net course of collegiate physical education from the aspects of designing principles,designing ideas, writing scripts, structure designation, navigation designation, and interfacial designation, so as to give some insights into the reform of collegiate physical education.

Abstract: In the radar target validation systems, the flight information as an important external information source occupies the irreplaceable position. However, in the resent researches, how to obtain the flight information stays focused and unsolved. The Real-time Multi-task Flight Information Acquisition System we designed and realized in this paper could obtain the flight information in real time and provide the real-time, reliable, detailed and complete flight information for the detective area. This system has already successfully used in Airway-nonairway Classification in an ATCRS (Air Traffic Control Radar System).

Abstract: Based on the basic process of mechanical product design and a modular design idea, the module includes three parts, i.e. design calculation, computer-aided drawing and foundation database. The design calculation mainly includes the commonly used design calculation program in mechanical product design, and the computer-aided drawing mainly includes the parametric drawing programs about the drawing environment and the commonly used machine parts, the foundation database mainly stores the data related to the mechanical product design. Then a computer-aided design module for mechanical product will be constructed by Autolisp and DCL. And the proposed computer-aided design module is developed on the friendly interface, easy to use, and can provide mechanical engineers for product design efficiency greatly.

Abstract: To enlarge production to meet the market demand, its nessasery to improve the present facility layout for MTO (Make-To-Order) manufacturing enterprises. This paper tries to design a optimization method based on genetic algorithm for the facility layout of MTO enterprises. Firstly, SLP (systematic layout planning) was applied to analyze the material and non-material flow interrelation of the workshop. Secondly, a relatively optimum layout was determined after using fuzzy hierarchy estimation to evaluate the schemes. Then the scheme was optimized with genetic algorithm. The result shows that the optimized logistics transport load is obviously less than before. This design method based on genetic algorithm (GA) is proved feasible and effective in the optimization of facility layout.