Applied Mechanics and Materials Vols. 397-400

Abstract: Developed a pair of Bluetooth master and slave modules with embedded microcontroller, based on wireless communication technology and automatic control theory, which could be simply applied into common equipments to achieve digital I/O communication. The pair of modules separately linked the control panel and PLC, and accomplish corresponding motion control through wireless data communication. Then the master-slave modules were applied to a three-dimensional warehouse model as a case to verify their wireless control function. This research successfully solves the bondage of digital communication with cables in previous industrial field.

Abstract: A serial-input serial-output encoder based on pipelined type I rotate-left-accumulator (RLA) circuit is presented for multi-rate Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) codes of Digital Terrestrial Multimedia Broadcasting (DTMB) standard. This encoding scheme can reduce the power consumption and save memory resource. FPGA implementation and simulation results show that the design meets the requirement of DTMB standard and simplifies the structure of the memory.

Abstract: All-optical wavelength conversion using cross-phase modulation (XPM) in a HNLF is demonstrated in this paper. The broadened spectrum caused by XPM which is induced by the input Gaussian pulses is given. The output BER of wavelength conversion is investigated.

Abstract: As a kind of special MDS erasure coding, regenerating codes are firstly used to solve the fault-tolerant problem in distributed storage systems. This paper constructs a new kind of secret sharing algorithm based on regenerating codes. The main process is that the original secret data is firstly stripped and coded with MDS erasure coding algorithm, then the vector components are periodically distributed to secret sharers in a certain order. The secret data can be rebuilt by decoding algorithm of regenerating codes if there are enough shares of the secret. Theoretical analysis shows that the algorithm is a safe threshold scheme. Because the operations are mainly linear on small finite field and its computation cost is low, so it is easy to realize.

Abstract: In this paper, a clustering protocol for Embedded Agent sensor network is proposed. In LEACH protocol, the selection probability P of candidate cluster head is constant without thinking about residual energy, which caused the lower residual energy easy to be the candidate cluster head. Compared with traditional structure of wireless sensor network, parameter was optimized. The confidence of the node, select probability and residual energy are the parameter of candidate cluster head, communication cost as the parameter of final cluster node. Compared with LEACH and ASCH, EACA take more parameters than LEACH. Results show that EACA can balance the energy load in the network, and effectively reduce more energy consumption.

Abstract: A polling control protocol for wireless sensor network (WSN), namely Sleeping controlled Point Coordination Function (S-PCF) was proposed based on IEEE 802.11 PCF and then the access control method of S-PCF was analyzed. In S-PCF, the center AP decides the sleeping time for every node so that it can synchronize the service with the nodes and maximize the sleeping time of each node to reduce the energy consumption coming from center APs empty polling and the idle listening of the active nodes in PCF. The single direction transfer mode was introduced to simplify the data transmission for the data acquisition environment and the number of the data frames subkinds was cut down so that the control can be lighten. Moreover, the transmission of the polling frame and data frame were also described in detail. Finally, the experimental results indicate that S-PCF can greatly save energy of idle nodes and extent the lifetime of wireless sensor nodes and the simulations also show that S-PCF can satisfy the system performance.

Abstract: The maximum communication radius is applied to estimate the distance between one hop nodes in the MCB algorithm. However, the distance is generally less than the communication radius in practical applications which will result in the location error to some extent. So, the distance estimated by the received signal strength indication (RSSI) is used to substitute the communication radius in MCB algorithm to improve the estimation precision. The simulation results show that the average localization accuracy of the proposed algorithm is improved by about 14% comparing with the MCB algorithm.

Abstract: In recent years, as the GAO KAO student numbers in China have been going down, and the size of the undergraduate school enrollment has been increasing. The enrollment of professional colleges are facing a lot of pressure and challenge. This article proposes and designs the Student Service System. Its main purpose is, by using MMS and SMS, for those students who have made the inquiries and inclined to apply for the school, to provide personalized guidance and service during the application process, and to increase the chance of being accepted by the school. The application of this system will increase the application rate and registration rate. And at the same time, it will improve the school's publicity and reputation. Therefore, it fulfills its purpose.

Abstract: According to the actual situation of coal mine,a voice alarming system which can meet with remote communication is designed. The system bases on CANopen protocol and can remotely transfer voice data through CAN bus.Furthermore it is of MP3 play function.Testing results shows that the voice alarming system can transfer voice data at a very low rate of 2.4kbit/s with distortion of voice signal being less than 15% and sound intensity being more than 90 db.The system is suitable for application in the underground due to its high reliability and low energy consumption.

Abstract: This paper presents a selective incremental information fusion method based on Bayesian network, so that the fusion algorithm can actively select the most relevant information and decision-making, and can make the fusion model to adapt to the dynamic changes in the external environment, and sensor information selection, fusion, decision-making integrated in the framework of Bayesian network . The experimental results show that this method is better than the traditional method.