Applied Mechanics and Materials Vols. 513-517

Abstract: A novel four-stage data mining method for clock bias prediction based on wavelet analysis and chaotic neural networks is proposed. The basic ideas, prediction models and steps of clock bias prediction based on wavelet analysis and chaotic neural network are discussed respectively. And then, to validate the feasibility and validity of the proposed method, make a careful precision analysis for satellite clock bias prediction with the performance parameters of GPS satellite clock, and make comparison and analysis with Grey system model and neural network model. The results of simulation shows that the prediction precision of the novel four-stage model based on wavelet analysis and chaotic neural networks is more better, can afford high precise satellite clock bias prediction for real-time GPS precise point positioning.

Abstract: This design has proposed a method which uses the Hypogynous Computer and ARM together to get a high speed temperature field display.It displays multi re-biulded severed two dimension section by takig image superier performance of WinCE 6.0 operation system as the subject.It has introduced a design idea with modular processes, and it provides a reference for the miniaturization intelligent instrument which it's measure subject is field.

Abstract: We put forward hierarchical data fusion in WSN, in which different fusion algorithm is used in each logic layer. The singular values are kicked out before data fusion with QCP (Quantization coding on precision) method in the cluster, while Difference comparison fusion algorithm are used between cluster head nodes. Mobile agents are used in above two layers. Simulation results demonstrate that the algorithm improves the accuracy of the data integration, lower power consumption and extend the life of the network.

Abstract: Nowadays, there are two approach in mixed-criticality scheduling. One is reservations-based approach such as EDF-VD(Earliest Deadline First-Virtual Deadline) and the Other is priority-based scheduling such as OCBP(Own Criticality Based Priority). This paper compared the two mixed-criticality scheduling algorithm from three aspects. The simulation results show that EDF-VD is better than OCBP in completed tasks and the system utilization, but in unmissed deadline ratio the later owns the better.

Abstract: This paper researches the parameters identification of grid units primary frequency, introduces the process of identification: Data capture, Data filtering, Data normalization and Based on the BP neural network and the method of Space Search. First of all, train the network by the unit response data. Then, get network model of weights and threshold value and the output of the network. Last, in the set search space, search the optimal results by the set step. Using the output of Space Search and the output of the actual system to do comparison, when the error is minimum, identification success, get system parameter. Through the simulation test, the method of parameters identify based on the BP Neural Network and Space Search Method is effective.

Abstract: With the rapid development of VDSL (Very high-bit-rate Digital Subscriber Line) system, not all the tones have the same margin. In order to cope with the slowly-changing channel, Bit Swap is utilized to swap the tone pairs: the one has a high margin while the other one has a relatively low margin. Although the Bit Swap has been proposed before, there is no Bit Swap established on EOC and the proposed scheme also implements coarse and fine SNR margin tuning. The paper presents the architecture and process of Bit Swap based on EOC and also proposes the method to adjust the margin for tones calculated to be swapped. After thoroughly tested, the test results show that the proposed scheme functions well. Compared with the scheme without Bit Swap, it greatly improves the performance against crosstalk noise and can reduce the RS errors to zero.

Abstract: Energy saving becomes one of the most important design considerations in the WBAN applications, and the power consumption is required to be strictly controlled. However, traditional WSN route protocols can't solve this very well. In this paper, we propose the cross-layer route which integrates adaptive sleep technology and DSR protocol with dynamic physical level power control scheme to meet the harsh requirements by reducing the power consumption of each sensor node. We developed a mathematical model of the send power control and analyzed the total battery energy consumption to forward a symbol. The experimental results on NS-2 platform indicate that the network life span and data package re-send rate of the improved DSR is better than the traditional one, and better fits the energy requirements of WBAN scenario.

Abstract: In view of the current development trend of Web service discovery technology and based on the service discovery method of formal concept analysis, the paper puts forward a service discovery algorithm based on QuickPeer, which exploits the idea of P2P network topology management to manage the formal concept of Web service in order to optimize the existing service discovery algorithm.

Abstract: Expound the existing modulation mode of the present wireless local area network. Directing at the problem that when single modulation method conveys data with high speed in the frequency selective fading channel, the system throughput will be declined and the efficiency of the spectrum will be lowered . Put forward the scheme that the OFDM sub-carrier will use different modulation modes after dynamic groups by amplitude frequency response. Simulation results show that the scheme will lower the complexity of the system achievement, and can get a higher spectrum efficiency.

Abstract: Testing for a variety of different industrial objects, this paper designed a multi on-line machine vision based on intelligent quality control system solutions. Microvision based on the company introduced the MV-8002 image acquisition card and the MV-VS1394 camera visual inspection of industrial software and hardware structure and the working principle of a high-speed online learning model of intelligent foreign recognition, it described the image acquisition card and the camera with the application and the software development. by the applications case, and the further evidence of the reliability of this system.