Applied Mechanics and Materials Vols. 397-400

Abstract: To solve the problem of attribute weight determination in the approximately duplicate records, we put forward a method based on fuzzy comprehensive evaluation to get attribute weight in data set. We first perform an analysis of the composition factors of attribute. Then we carry out an evaluation of their rank. Finally, we make a determination of the attribute weight using the fuzzy comprehensive evaluation method, on the basis of which the approximately duplicate records are detected. Theoretical analysis and experimental results show that the method can objectively determine all attributes weight, and effectively detect the approximately duplicate records in massive data set.

Abstract: In order to solve the complex industrial control problems in grinding control,we construct multi-agent grinding control system based on the blackboard model in this paper. Through the study on the structure and control mechanism of the blackboard model, we design a framework for blackboard model in multi-agent grinding control system, divide and introduce the function model of the blackboard in detail, establish blackboard control agent to control and coordinate how the individual agent takes use of the blackboard resources centralizedly.Aiming at actual situations of the grinding control,we put forward cooperation mechanism multi-agent based on a combination of tasks sharing and results sharing, establish control decision agent to solve the conflict caused by multi-agent cooperation. The cooperation mechanism multi-agent grinding control system improves the execution ability of the individual agent, avoids the conflict caused by different goals and the competition of resources, ensures the coordinated executive of multiple tasks.

Abstract: This paper was linked to the requirement of coal mine information construction, firstly, on the basis of heterogeneous data environment of the coal mine to sort out, induction, classification, we established an integrated model from the coal underlying data to the application layer, which includes 4 layers: data acquisition layer, data source layer, intermediate interface layer, application layer. The model focused on the underlying data integration and intermediate interface layer data integration, put forward a design idea, which includes mine underlying data integration based on OPC interface and intermediate interface layer based on virtual database and data warehouse, the intermediate interface layer has 4 layers, they are virtual database sub-layer, the data warehouse sub-layer, meta-database sub-layer and service management sub-layer. The coal comprehensive integrated model provides a unified data access platform for integrated data query, 3D visualization integration, Mine Safety forecast and intelligent decision.

Abstract: Continuous collision detection (CCD) algorithm is a vital step in virtual reality. This paper describes an efficient self-collision detection algorithm called the minimum normal cone algorithm. The algorithm calculates the parent-normal cone in a new way, which optimizes the two test conditions for the self-collision detection: In the first test condition, we analyze and calculate the relative position between the two child-normal cones, and then a bottom-up technology is used to build the parent-normal cone. Thus the two child normal cones can be surrounded by the parent-normal cone perfectly, and the normal vectors motion range of the parent-triangular mesh can also be closely restricted; In the second test condition, we calculate the normal vectors motion range of the contour projection line, and check whether the projection line is self-colliding or not, to avoid excessive tests between segments. The algorithm has been implemented and tested on two classical models, cloth-ball and N-body model respectively. Experimental results demonstrate that our algorithm can decrease the number of elementary tests by two orders of magnitudes, and significantly improve the performance of the overall CCD algorithm.

Abstract: Application of pervasive computing in education is attracting more and more attention. Wireless communication technology and context-aware technology is widely applied in ubiquitous learning environment. This paper discussed the function, characteristics and component of ubiquitous learning environment, aims to build a campus integrated learning environment and provide adaptive learning contents and service in an intelligent way for learners.

Abstract: Based on previous work, which presented theorems and algorithms for generating a new type of generalized Ball curve (Partial Said-Ball curve), the present study supplements the transformation formula from a Bézier curve to a Partial Said-Ball curve and prove the corresponding theorem. All the results are useful for the application of generalized Ball curves and their popularization in Computer Aided Geometric Design.

Abstract: Because of the lack of generality, the existing data publish/subscribe systems are mostly used in a particular field. In order to satisfy the general support of interdisciplinary model, proposed a general data publish/subscribe model based on DDS. The model supports the configuration and modification of the underlying data types. Simulation results show that the general data publish/subscribe model based on DDS can be well applied in various types of data publish/subscribe occasions.

Abstract: This study proposed the sports training auxiliary system design concept based on the characteristics of cloud computing and needs of modern sports training. The paper illustrates the key technology of system of body frame structure, infrastructure services, platform management, intelligent service, etc. The system not only to the popularization of computer-assisted training, improve the effect of training plays an important role, and can obviously improve the different regional sports resources is not balanced, the unequal status information.

Abstract: Cloud computing is a computing model, computing and storage tasks be assigned to the cloud that be composed of a large number of computers. The cloud computing technology are introduced firstly, then the cloud network platform, the service platform for barrier-free special education and functions are detailed described, lastly the key technology is given, such as TTS technology, Microsoft Speech SDK.

Abstract: On the basis of previous work, this paper aims to build several proper drought indices based on passive microwave remote sensing AMSR-E data in Huaihe River Basin. Compared with measured soil moisture, optimal drought indices have been selected to explore the spatio-temporal variation of drought conditions. The results indicate that there are satisfactory negative correlations between MPDIs (Microwave Polarization Index) and observed soil moisture. Moreover, MPDIs calculated by bands of 69GHz and 187GHz are much closer to variation trend of soil moisture than those obtained by other bands.