Applied Mechanics and Materials Vol. 340

Abstract: The Distributed Component management technique is a key technology to achieve millions monitor-points and determine the performance of the integrated supervisory control system (ISCS) in rail transit. A feasible technique applied to ISCS is described, which includes the distributed component architecture, component index with positioning and redundant components management. The application results show that the performance of ISCS is unaffected significantly by the number of nodes increased based on this technique. Therefore, this technique meets the millions monitor-points level monitoring performance requirements.

Abstract: On the basis of the EP1C6Q240C8 belonging to Altera Cyclone family, a GPS electronic guide alternative system was designed by SOPC technology based on Nios II soft core processor. The system is based on GPS positioning, integrated application of embedded technology, GIS, communication technology, data acquisition and analysis techniques. Besides, this system can meet the needs of independent tour guides, for example positioning, spots introduction, destination search, path selection as well as emergency communication and so on.

Abstract: With the help of the symbolic computation system Maple and the (G'/G)-expansion approach and a special variable separation approach, a series of exact solutions (including solitary wave solutions, periodic wave solutions and rational function solutions) of the (2+1)-dimensional modified dispersive water-wave (MDWW) system is derived. Based on the derived solitary wave solution, some novel domino solutions and chaotic patterns are investigated.

Abstract: This paper presents a new approach for generating multi-scroll chaotic attractors. First, a new double scroll chaotic system with piecewise linearity and invariance under the transformationis introduced. Then, by using the even-symmetric step-wave sequence switching control method in this system to extend the number of saddle-focus points of index 2, the intended multi-scroll chaotic attractors can be obtained. A circuit for generating multi-scroll chaotic attractors is designed, and the experimental results are also given, confirming the consistency of the theory design and circuit implementation.

Abstract: The objective of this study is to find an effective way to realize lane-level route guidance for vehicle navigation system. Based on the modeling of 3D map, a lane-level positioning method was presented by the way of combination of virtual differential GPS, height aiding, and collision detecting technique. GPS parameters were amended through virtual differential technology and height aiding technology by the way of elevation interpolation and least squares estimation in order to improve the output precision. Then a method of lane-level map matching was implemented in 3D digital map based on the collision detection technology. Tested by RTK technique, the method was proven to fulfill the demands of vehicle navigation systems.

Abstract: In order to recognize the mode of analog modulation with low SNR, a recognition procedure is proposed. In this procedure, the high-order feature is used as characteristic parameter for recognition. Firstly, the characteristic parameter needs to be extracted from the signal to be recognized. Secondly, the threshold values of four modulation modes need to be calculated. At last, the characteristic parameter extracted will be compared with the four threshold values, respectively. The method and order of comparison is based on decision tree classifier. By comparison, the mode of analog modulation with low SNR can be recognized accurately.

Abstract: By analyzing the principles of blue tooth transmission, it turns out that the Four-Hierarchy Bluetooth Transmission System can be made by applying the embedded Linux technology. Comparison analysis showed that the data transmission between multiple Bluetooth devices is available through a system created upon the Bluez protocol and openobex protocol. Besides, this also proofed that a combination of Linux and Bluetooth can make it possible to create a fair stable data transmission system, which could be used as a reference for the application in other areas.

Abstract: The intensity of the sound energy received by the wireless sensor networks using independent component analysis method to obtain the goal of energy between each other mixed proportion, and the use of sound energy model and maximum likelihood estimation method to locate the target. Experimental results show that the method has a higher positioning accuracy and noise immunity.

Abstract: With the continuous development of economy and science technology, residential area shows the intelligent, humane and diverse development trends, residential security has been paid more and more attention. Community monitoring system provides security living environment for district residents, wireless sensor network technology provides an opportunity for security monitoring system and wireless network. On the foundation of wireless sensor network, constructing the intelligent community security monitoring system, the wireless communication node is designed, to carry out the study of the network communication protocol and algorithm. The experimental results show that this monitoring control system has low power consumption, functional diversity and communication stability, which is applicable to a variety of conditions of community security monitoring.

Abstract: For the two kinds of commonly used codes in low frequency read-only RFID tag: Manchester encoding and Differential Bi-Phase encoding, we designed the corresponding encoding circuit, as shown in Fig. 5 and Fig. 10. It was fabricated by SMIC 0.35um CMOS process through full custom design method and has been successfully applied to a read-only RFID tag based on ISO/IEC 11784/5 standard. The chip testing result shows that the designed circuit can achieve ideal encoding effect, as shown in Fig. 14 and Fig. 15, which possesses the properties of high accuracy and strong anti-disturbance.