Advanced Materials Research Vols. 225-226

Abstract: Chinese segmentation system is a difficulty in computer Chinese information handling. A deep discussion on methods of MMSeg and double array TRIE Chinese segmentation matching on the basis of existing technology in Chinese segmentation is made. On this basis of it, some improvements are made in the dictionary construction and segmentation arithmetic, designing a Chinese segmentation system based on MMSeg and double array TRIE. Experiment shows that the improving arithmetic accelerated the speed of Chinese segmentation.

Abstract: With the change of the human life style, heart disease has become one of the main diseases threatening human life and health. Promptly, accurately and completely achieving electrocardiogram (ECG) signal has vital significance for discovering and treating heart disease as soon as possible. However, the traditional professional electrocardiograph has complex structure, high price, and it is not suitable to carry on the popularization application. Therefore, this article proposes a new type of ECG signal sample and analysis system based on a personal computer, which realizes acquisition and analysis function through the LabVIEW programming. The research result shows that it has not only perfect function, convenient operation, easy to use, but also low price, and it is very suitable to universal application. So, it has very good practical value.

Abstract: This work proposes an efficient motion estimation algorithm for video coding. The proposed method calculates the partial distortion by replacing a certain number pixels of each partial sub-macroblock. In addition to increase the probability of the rejection of unsuitable motion vectors without additional computations, the proposed approach reduce computational complexity significantly and obtains better objective quality than conventional motion estimation algorithms.

Abstract: In mobile transaction process, there exists frequently data transferring and replication. By the bandwidth limitation, discontinuous characteristics, there are a lot of questions in mobile data loss, replication failure, etc. Aimed at the questions, the paper proposes several mobile data transfer and replication algorithms based on agent. Every proposed algorithm is analyzed and simulation is performed to compare their delay. Result shows that through collecting small data transactions by agent, data are batch processed to servers, which may reduce the total cost of replication and promote replication success ratio and reduce the delay of replications. Adaptive algorithm is also considered.

Abstract: Industrial construction project site selection, which shall focus on analyzing economical factor of much difference from various plans with consideration of the influences by social political, economical and environmental factors, put forward Multifactor Ranking Method. It combines the Analytic Hierarchy Process and Distance Comprehensive Evaluation Method based on Spatial Statistics together with working out weight of each factor by Analytic Hierarchy Process firstly, ranking the relative proximity of decision object by Distance Comprehensive Evaluation Method secondly, making best decision subsequently. Lastly, it is applied to ranking the advantages and disadvantages of the alternative sites of a power plant project and the results proved to be objective and effective.

Abstract: Community property management in metering and charging of resource and energy consumption, such as water, electricity and gas charging are a time-consuming, laborious, tedious and monotonous work. It also needs a large amount of computing and the computing requires high accuracy because the dispute will affect the social security easily. The current used meter reading and charging systems for resource and energy consumption of household are analyzed in this paper. The wireless automatic meter reading and charging systems are also discussed. A design scheme is proposed based on short-range wireless meter reading communication technology. The combination of CC1100 radio frequency module and GPRS network is used in the scheme. The system has the characteristics of low in price, simple in structure and good stability.

Abstract: Trace inequalities naturally arise in control theory and in communication systems with multiple input and multiple output. One application of Belmega’s trace inequality has already been identified [3]. In this paper, we extend the symmetric positive definite matrices of his inequality to symmetric nonnegative definite matrices, and the inverse matrices to Penrose-Moore inverse matrices.

Abstract: Cognitive radio is seen as an intelligent wireless communication system that can learn and adapt the surrounding environment. Cognitive engine is the core component of implementation of cognitive radio. Information in knowledge base of cognitive engine can be obtained by using of machine learning. In this work, we consider wireless networks with clustered nodes and OFDM physical layer and present a combined sub-channel selection and modulation and coding rate selection based on k-Nearest Neighbor classification algorithm. Computer simulation results show that, in frequency selective fading channel, the scheme makes a new network node easy to choose appropriate modulation and coding rate.

Abstract: Lie groups and Lie algebras are used to research the dynamics and computed torque law control of free flying space robot systems. First the adjoint transformations and adjoint operators of Lie groups and Lie algebras are discussed. Then the free flying base systems are transformed to fixed base systems. The inverse dynamics and forward dynamics are described with Lie groups and Lie algebras. The computed torque control law is used to simulate with the results of dynamics. The simulation results show that with the method the dynamical simulation problems of space robot can be solved quickly and efficiently. This built the foundation of real-time control based on dynamics. The computed torque control law has good performance.

Abstract: For the Z-constant contour machining, a slicing contour generation procedure for subdivision surface is presented. Subdivision surface defines a smooth surface as the limit of a sequence of successive refinements starting from an initial control mesh. It can easily generate smooth surfaces of complex arbitrary topology without intricate patch stitching and curve trimming. Instead of randomly intersecting each facet with a slicing plane and having to construct the slicing contour later, this paper takes full use of the topological information of subdivision surface to construct the slicing contour. The contour information is collected as marching from one effective edge to neighboring effective edge. Example shows our method is obviously easier and the complexity has been reduced