Applied Mechanics and Materials Vols. 380-384

Abstract: Traceable system, which is an effective way to control the quality and safety of agricultural products receives increasingly attention globally. Using the food safety of poultry processing as the research object, the paper builds a safety production management and quality trace system in order to achieve the goal of quality trace. Making detail analysis of the RFID data acquisition and compression delivery method, the author using wavelet compression technology to complete efficient delivery issues of tag identification and ensure delivery efficiency. This paper achieves the function of efficient transmission and tag-data acquisition in quality traceability system for poultry processing.

Abstract: We propose an image segmentation approach with FCM optimized by Differential Evolution (DE) algorithm, a weighed summary validity function with some popular FCM validity functions is presented to form the fitness function of DE, we check our approach with some validity functions and compare experimental results between FCM and our method, comparisons show high performance of our approach.

Abstract: computer network multimedia communication has spread all over daily work and life fields, people also have put forward higher requirements for computer multimedia communication network. Based on current network multimedia communication, there are a large amount of data transmission, high-speed and dynamic characteristics, the mining technology of its communication data flow is carried out related to research. In this paper, the frequent item sets of data stream mining technology is carried out related to research, and the classical HCOUNT algorithm is carried out relevant analysis, according to the relevant analysis, the classical HCOUNT algorithm is improved, in order to alleviate possible error problem in data mining. Finally, the data stream mining algorithms are carried out relevant analysis of actual experimental data. Study on the technical aspects of the data flow mining in computer network multimedia communication, it is an important role in the development of the computer network multimedia communication. Study on the improvement of the current algorithm, it provides reference in the similar field of algorithm research

Abstract: With the development of world science and technology, people's quality of life and living standard is also improving gradually, so the technology of remote access and control system will be born. The household appliances are carried out the remote access based on infrared communication technology, to construct the infrared communication coding protocol procedures, it can pass through the procedures to achieve the related functions of various electrical appliances with the organic coordination, in order to remote access for the household appliances. At the same time through the timing function of the infrared communication technology, it can be form a complete access and the control system, and can be the formation of the received infrared communication and emission flow diagram, in order to achieve the largest household appliance function and use, effectively guide people better infrared communication technology to be widely and effectively used.

Abstract: Based on requirements on high performance and high resolution of modulators, a fourth-order Sigma-Delta modulator for audio application is developed in this paper. The modulator is designed under the commercial 0.5μm CMOS process and the circuits are given simulations by Spectre. The sampling frequency of sigma-delta modulator is 11.264 MHz, and OSR is 256 within the 22 kHz signal bandwidth. Measure performance shows that Sigma-Delta modulator enables its maximum SNR to achieve 103.5dB, and the accuracy of Sigma-Delta modulator is up to 16 bit.

Abstract: Ad Hoc network has the characteristics of self-organization and dynamic topology, so it can use polling strategy for data collection. In this paper, the data link layer of the Ad Hoc network data acquisition system has been carried out the detailed analysis and study, through the use of polling policy in the access network node to solve the problem of competition for resources and allocation mechanism in the network link, and improve the channel utilization and system stability. The design based on VHDL language to achieve RTL-level description of the Ad Hoc network data acquisition system, and Altera Corporation EP2C35F672C6 as target chip, and in the Quartus II platform 8.0 conducts synthesis, placement, routing, and comprehensive simulation, and finally inDE2 the experimental board download is verified. The entire hardware design is of simple structure, reliable high, real-time, and can be widely used in the field of sensor networks and mobile communications network.

Abstract: This paper studies the thesis of slip-sweep acquisition method in vibroseis exploring. First of all, it briefly describes slip-sweep acquisition in principle, operation and signal processing, compared with the bomb exploring and conventional cascaded sweep acquisition and analyzes the principle of vibroseis exploration in detail. Then the reason why harmonics generated is analyzed. Among the harmonics, high frequency harmonics is most serious. Based on extensive research on the theory and the numerical experiments, the paper assumes that the energy of the high frequency harmonics and that of the original stimulated signal into a linear relationship. According to this assumption, a mathematical model to filer out high frequency harmonics is established. After generating standard high frequency harmonics through frequency doubling and estimating the ratio of the energy of each harmonic and fundamental, the mathematical model perfectly matches actual seismic data processing, that is, an effective way of vibroseis data processing. Finally, the paper developed full procedures of slip-sweep vibroseis data processing and made all the programs. With a fast processing speed and obvious effect, the programs achieve good application; fully meet the industrial demand to process vibroseis data.

Abstract: t be analysed about the recognition methods for digital image in this paper. In the digital image preprocessing, the conservative smoothing, mean filtering, Gaussian sharpening and binarization are used to improve the effectiveness of the digital feather extraction. A distance feature information method for recognizing digital images be proposed in this paper.The method be evaluated and compared by experimental tests.

Abstract: According to the parametric acoustic array theory and Berktay far-field solution, analyze the self-demodulation distortion theory of the DSB method and the square root method with the dual-frequency signal input and present the distortion calculating formulas. Bring forward an adapting modulation algorithm, which can restrain over modulation effectively. Compared with theoretical analysis, the simulation results of MATLAB are satisfactory.

Abstract: Employing S3C2410 as the core component, a kind of concentrator in power energy information acquisition system based on the Internet and the short-distance communication technology Zigbee has been designed in this paper. The structure and function of the system has been introduced too. The Internet and Zigbee communications are realized and parts of the circuits and flow charts are given. This system uses the short-distance communication technology Zigbee to realize the data transmission between concentrator and collector, and then uses the Internet to carry the data to the superintendent center, and realizes the remote brail and management function. Empirical results show that this system can primly realize the itinerant excerption of the ammeters, the analysis of the statistical electric dosage, and the remote control of switch on and off. This system has the low cost, high reliability and stability, it can advance the automation level of the electric power management, and has a good foreground.