bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Air Density on Output Power of Wind Turbine
Authors: Liu Ying Zhi , Liu Wen Xia
Published: July 2013

This paper elaborates the effect of wind speed on the output power of the wind farms at different locations. It also describes the correction of the power curve and shows the comparison chart of the standard power curve and the power curve after correction. In China's inland areas, wind farms altitude are generally higher, the air density is much different from the standard air density. The effect of air density on wind power output must be considered during the wind farm design.
A Novel Optimal Planning Method for Combined Cooling, Heating, and Power (CCHP) System
Authors: Zhan Li Ping , Zhu Zhen Hui , Peng Xu Dong , Zhou Gan , Gu Wei
Published: July 2013

Planning of combined cooling, heating and power (CCHP) systems are complicated due to the diversity of energy demands. Some mathematical models for the design of CCHP systems have been developed, most of which adopt a one-third peak load strategy. In this paper, we present a novel optimal planning method for CCHP systems, which is divided into two levels, the system level and the equipment level, each of which has a mathematical model. Minimizing the total annual cost is the optimal object of the system level, while minimizing system life-cycle cost is the optimal object of equipment level. Results show that the CCHP system planned by the novel optimal planning method can achieve better economy and energy efficiency, and the running costs are pretty lower.
Improved Algorithm for Identification of Thévenin Equivalent Parameters for Voltage Stability Analysis
Authors: Fan Li Xin , Jiang Yi Quan , Gu Tian Wei
Published: July 2013

This paper proposes an improved algorithm for tracking the Thévenin equivalent parameters with local phasor measurements for voltage stability analysis. Estimation errors between the Thévenin equivalent voltage and impedance are mathematically formulated, and then used to correct the equivalent parameters with two subsequent measurements. This algorithm does not introduce any parameters drift problems and does not need a large data window to converge. A 2-bus test system, the IEEE 14-buses system and an actual 500kV grid system from China are used to test the proposed algorithm. Test results indicate that this algorithm is accurate, robust and fast for real time voltage stability monitoring and control.
WSN Energy Management Model Based on Multiple Mobile Agent
Authors: Li Yan , Yao Hao Hao , Dang Xiao Chao , Hao Zhan Jun
Published: July 2013

This paper proposes an energy management model of wireless sensor networks based on multiple mobile Agents. It constructs the MMAEM (Multiple Mobile Agent Energy Model) energy model and introduces in the model an algorithm called MMASDTPA (Multiple Mobile Agent Synergetic Distributed Task Processing Algorithms) in order to reduce the delay, save energy and prolong the network life. The simulation experiment shows that it has less energy consumption and shorter network delay than LEACH and single mobile Agent energy management model.
Research on over Frequency Generator Tripping Configuration Scheme of Regional Grid in Infirm Interconnections and Small Capacity
Authors: Yang Fan , Su Yin Heng , Zhao Shu Qiang , Song Yun Ting , Mei Yong , Wang Qing , Zhang Zhi Qiang
Published: July 2013

The frequency characteristics of islanding operation are introduced firstly. The magnitude of balance between electromagnetic power and the original motive power and the inertia of the system are the critical factors that affect the frequency. Based on the possible over-frequency problems during the isolated operation of the regional network, the configuration principles of over frequency generator tripping are proposed. Taking an actual grid as an example, an adaptable and efficient configuration solution of over frequency generator tripping is made according to the principles. In addition, the coordination between over frequency generator tripping and over-speed protection controller is studied. This paper brings forward meaningful reference configuration principles for over frequency generator tripping that is suitable to small-capacity regional power grid which is in infirm interconnections.
Analysis on Metamorphic of the Cable-Driven Parallel Mechanism in Wind Tunnel Test
Authors: Chen Qing Lin , Lin Qi
Published: July 2013

The workspace is limited in the fixed parameters of cable-driven parallel mechanism and interference often happens between cables and surfaces of actuator. The fundamental basis of metamorphic mechanisms is addressed in accordance with the design, kinematics and dynamics, as well as the compliant metamorphic mechanisms. Metamorphic structure was applied to the cable-driven parallel mechanism. The more adaptive metamorphic mechanism is the full mobile hinge, which provided whole workspace of the frame. Through adding the adaptive hinge, the workspace was extended. The new methods of distant to detect interference between cables and faces of actuator was discussed and applied to a 6 DOF cable-driven parallel mechanism. Comparing with other methods of calculation of interference, it showed more accurate and provided a function to metamorphic control. The volume of interference was coherent and the force of cable was smoother to control when testing the high angle of attack.
Research for Cornering Gearshift Strategy of Automatic Transmission Vehicles Based on Fuzzy Inference
Authors: Fu Yao , Zhang Wen Ge , Lei Yu Long , Liu Hong Bo
Published: July 2013

Undesired gearshift often occurred when the vehicle was under the curve driving condition. To resolve this problem, this paper proposed a fuzzy correction gearshift strategy under cornering which put the lateral acceleration and lateral acceleration variation rate, the external load and the real-time vehicle speed as parameters. Road test results showed that the undesired gear shift frequency was largely reduced and this method improved driving comfort and security under cornering condition.
Distributed Intelligent Control System Design Based on CAN Bus
Authors: Huang Shu Wei , Wen Dan Li
Published: July 2013

The hydraulic drive valve intelligent control system was discussed. Two grades, the field cell and the remote control cell, were used in the distributed control system. The communications of the system were implemented by Controller Area Network (CAN). At the first grade, single-chip microcomputer (SCM) acted as the control chip. The sampling pressure signal in pipeline was transformed into the output digital control signal by the controller. The digital direction valve acted as a transformation unit which converts the electric signal to mechanical action in the hydraulic circuit. The control process was realized by the digital signal directly acting on the step electrical motor. At the second grade, the industrial-control computer with a favorable man-machine conversation interface was used to realize monitor function.
The Transformation of Control System for Bell-Type Annealing Furnace with Pure Hydrogen in Pangang Group Cold Rolling Mill
Authors: Wu Jian Bing , Liu Ji Guang
Published: July 2013

The transformed control system of bell-type annealing furnace with pure hydrogen in Pangang Group cold rolling mill is analyzed, and the technological process, the structure of control system, the control principle are introduced. The principles and implementations of important control functions are analyzed in detail, including security measures, the measurement and control of hydrogen flow, temperature control etc. The production practice shows that, the transformed control system stabilizes the production process, improves product quality, optimizes the production process.
A Controller Development Based on PLC for Climate Control of Agricultural Greenhouses
Authors: Wu Wei Xiong , Zhao Yun , Zhao Jie Qiang
Published: July 2013

Forced ventilation has more accuracy in climate control of agricultural greenhouses. It is worthwhile to apply some energy saving measures to overcome the disadvantage of high power consumption in fan driving of forced ventilation. Here we present a new developed controller based on PLC which mainly can control the ventilation fans rotation speed in combination with variable frequency drive except for manipulating other facilities in greenhouse like pad, shading screen etc. The control system integrates a sense module which measuring solar radiation, temperature and humidity inside and outside of greenhouse, an actuating module which includes variable frequency drive, pad control and radiation screens to perform a optimized cooling strategy to reduce electrical energy consumption by low down the fans rotation speed with ambient condition changes.
Control System for Automatic Positioning the Working Device of Metamorphic Concrete Grouting Machine
Authors: Cai Tian Fu , Zhou Jian Zhong , Wu Xue Min , Peng Wei Ping , Yan Xi
Published: July 2013

In order to improve the automation level of the metamorphic concrete grouting machine, an automatic positioning control system was developed based on the knowledge of signal acquisition and hydraulic control technology with PLC and HMI. Angle sensors installed on the arms of the grouting machine and the grouting working device were used in this system. Firstly, users determine the reference position according to practical needs, and use the PLC to complete information collection and respective reference positions recording. Then, before the grouting starts, PLC makes a real-time detection and compares the positions of the excavator boom, arm and the grouting working device, and controls the hydraulic cylinders of the excavator sequentially to adjust the positions through electro-hydraulic proportional velocity regulating valve and solenoid control valves. This control system can realize automatic positioning.
A Wire-Speed Delay/Jitter Simulator and Emulator in Wireless Sensor Networks
Authors: Wu Heng Kui , Hu Ya Ping , Bao Si Yun
Published: July 2013

Currently applications in wireless sensor network are just designed in the laboratory networks, while in real networks the resource is not unlimited because of network bandwidth, delay, jitter, packet loss and so on. In this paper, we propose a simulator and emulator for network delay and jitter in wireless sensor network, which is designed with FPGA and DDR3 to achieve the wire-speed delay/jitter simulation. The experiment results show that the simulator/emulator is efficient.
A Kind of Selection Methods of Evaluating Springback Reference Points of Complex Surface Sheet Metal Stamping
Authors: Shao Hong Yan
Published: July 2013

Use accurate springback evaluation method to guide modifying die surfaces, that is the first pledge to rectify the springback of sheet metal stamping by mould compensation method. Aiming at the problems in springback evaluation of complex sheet metal stamping and to improve the simulation precision of finite element, presented the face-to-face selection methods to select reference points evaluating springback, then used this method on the spiral blades reference points selecting and springback evaluation. Result shows that this method can determine the range of reference points evaluating springback rapidly and get a comparatively accurate result of springback evaluation.
Experimental Investigation of Static Pressure Characteristics of FBG Differential Pressure Flow Sensor
Authors: Liu Chun Tong , He Zhen Xin , Zhang Yang , Li Hong Cai
Published: July 2013

On the basis of FBG (Fiber Bragg Grating) sensor principle analysis, a differential pressure flow sensor using FBG has been designed. The static pressure characteristics of the sensor were experimental studied by the hydraulic pressure calibrator and Q8384 spectrometer, and the experimental result errors were analyzed. Experimental results show that, the sensitivity coefficient of FBG is 3 pm/KPa in the differential pressure range of 0~0.35 MPa. The changes of Bragg wavelength with the pressure changes showing a good linear relationship and repetitive, and the hysteresis phenomenon is minor, which can be used for flow measurement of hydraulic system in special areas.
Intelligent Tool for the Design of Electrical Connectors
Authors: Fok S.C. , Tan Fock Lai
Published: July 2013

The paper describes an intelligent system for the automatic generation of electrical connector designs. A framework for the system is proposed based on the case-based reasoning approach. The work aims to improve the productivity through automatic exploration of the electronic CAD drawings and reuse successful past solutions for the generation of new conceptual designs. Although this paper focuses on the connector designs, the fundamentals could be applicable to other products that contain distinct sub-components confined within a fixed topology.
Real-Time Rendering for Large-Scale Underground Mine Scene
Authors: Li Da Jin
Published: July 2013

A virtual mine system involves masses of laneways and machinery with great number of model data, which restricts rendering speed seriously. In this paper, a rendering algorithm specially developed for virtual underground scenes is proposed. This algorithm considered each laneway as a visible area and applies the cuboid bounding boxes of laneways for the cameras inside-outside testing to determine the cameras position, consequently determined the visible regions and exclude invisible laneways as rendering. To decrease the calculations of inside-outside testing, octree was employed to reduce the detection scope. The experiment results indicated this algorithm was capable of substantially reducing rendering objects and had the obviously faster rendering speed than the conventional rendering acceleration algorithms.
A Prototype Monitoring System for Automotive CAN Bus Gauge
Authors: Lee Yi Ming , Yeh Fu-Yen , Chang Shyue Bin
Published: July 2013

CAN bus communication has been used in a serial protocol for connecting electronic control modules together with its hardware and software design in automotive gauge application. The motivation is to develop a PC-based monitoring system for not only CAN frames received from or sent onto CAN bus, but also data recorded on log files consideration. This paper presents a prototype monitoring system on automotive CAN bus gauge for communication protocol in Ford Mustang. For the proposed CAN bus monitoring system, the designed architecture is discussed and verified into PC for surveillance performance. Furthermore the Ethernet technology adopted in the system makes it a more practical and convenient CAN bus testing system.
Construction and Application of 3D Model Based on the Lithologic Characteristics of Ore
Authors: Shao Bi Lin , Wu Qiong , Wang Li Qing
Published: July 2013

Based on the 3D mine software platform and aimed at optimizing the ore blending process,according to the different lithological features of Molybdenum and Tungsten in Sandaozhuang open pit,the data integration of storage,update and management in different maps,images,tables,lithology was realized.Using the lithologic database and human-computer interaction technology,the complex lithology profile of exploration line has been drawn,and based on the technology of triangulation,the lithology model of skarn, hornfels, quartzite has been established. The construction shows that this model can provide theoretical basis and data foundation for ore blending method of lithology.
Interactive Digital Campus Visual Navigation System Design and Development
Authors: Yang Wen Yang , Zhang Liu Mei , Pan Shao Wei , Fan Zhi Xuan
Published: July 2013

Designing an interactive virtual navigation system needs consideration of compositive features such as modelling, movement control and object selection. Those features are key to meet end user requirements. Current virtual navigation systems are not beneficial to popularize in the case of development environment, methods and technologies. That is because such systems have limited application area and costs. Proprietary development environment result in limited selection in system components while new development technologies are unlikely to be accepted as staggering capital costs. In this paper, we propose a feasible scheme and development environment to design an interactive virtual navigation system for creating and utilizing digital campus models. Furthermore, the scheme also captures user interactivities via mouse and keyboard for further controls and selections in virtual campus. By adequate consideration of user preferences and personalities, this system benefits in portability, flexibility; has a high degree of standardization and lower cost.
Research on 3D Visualization of Underground Antique Tomb Based on Augmented Reality
Authors: Chang Yong , Xu Wen Peng , Wang Lei
Published: July 2013

This paper researches on 3D visualization of underground antique tomb based on Augmented Reality .At first,this paper established 3D model of antique tomb with OpenGL in VC++6.0. In order to establish augmented reality 3D model of antique tomb, the OpenGL model of antique tomb was transferred into ARToolKit and realized 3D augmented reality visualization in ARToolKit. As ARToolKit uses computer vision techniques to calculate the real camera position and orientation relative to marked cards,so it is difficult to provide AR applications in outdoor environment. At last, this paper puts forth a new method to allow ARtoolkit to receive the data of GPS and 3D electronic compass, so it can make 3D registration with both computer vision and sensors.
Design of Remote Monitoring System Based on Embedded System
Authors: Yu Shu Fang , Shi Xiao Ping , He Zhong Yue
Published: July 2013

The embedded technology has widely applied in the remote monitoring system. This paper is mainly for remote monitoring system project design based on embedded Web technology. And on the basis of the overall system design, it has separately carried on the detailed design and analysis to the software and hardware structure.
Study on Gold Nanoparticles Aggravating MEMS Cantilever Gene Detection Biosensor
Authors: Ge Yue Tao , Yin Xiao Tong , Guo Chao Bang , Yang Bo
Published: July 2013

In order to detect whether there are nucleic acid components interested in the testing samples, this study manuscript presents a method and a process based on MEMS technology and biosensor technology. Although MEMS micro cantilever is very sensitive for stress mass, we must aggravate the cantilever for the reason of microscopic DNA mass is very weak. In order to achieve the purpose of their molecules detection level, gold nanoparticles (GNPs) which are combined with hybridization information is taken to aggravate MEMS cantilever, and we employ Au - S chemical bond of GNPs and dithiol HS(CH2)6SH to combine and fix DNA probe, and then employ target DNA which is marked with biotin to combine GNPs by Biotin - Streptavidin combining. We use the method of layer by layer to amplify the signal again until meet the hypersensitized requirements. Last we apply multi-channel microfluidic technology to achieve high-throughput detection.
Modeling and Calculation of the Sharp Conductor Structure of Corona Discharge
Authors: Zhu Li , Liu Shang He , Xu Shuai , Lei Xiao Yong
Published: July 2013

In order to study the corona discharge on the sharp conductor structure, the relationship between conductor radius and corona was found by analysis of the three basic structures of corona discharge, and calculating the potential around the conductor in the three cases. Based on the three basic structures, the model of sharp conductor structure of corona discharge was established. Since of it, the threshold voltage of it could be easily calculated, which may provide supports for the further research on corona discharge on the sharp conductor structure.
A Novel 4-bit 10Gsps ADC in 180nm SiGe Bicmos Process
Authors: Hu Rong Bin , Cai Xiang
Published: July 2013

In this paper, a novel 4-bit ADC is presented. The ADC adopts interpolated flash architecture with eight preamplifiers followed by fifteen latches. The ECL technique is used in the design of the ADC. Because of the novel design techniques adopted in the ADC, the conversion rate is very fast, up to 10Gsps, which has been proved by the stimulation results.
Permanent Magnet Synchronous Motor Drive System Based on Fuzzy Control
Authors: Qu Wei , Qiao Hai , Zhang Zhao Xi , Qiu Chen , Zhang Lei , Li Wen Qiang , Zhang Quan Yu
Published: July 2013

A permanent magnet synchronous motor fuzzy control drive system based on field programmable gate array is proposed in this paper. This system has the high-precision control characteristic, which is hard for the traditional permanent magnet synchronous motor drive system to achieve. In this system a magnetic field oriented vector control with a zero excitation current is used, and three feedback loops consisting of current loop, velocity loop and position loop are used to build three fuzzy proportional integral controllers with fuzzy control method. The reliability and the dynamic of system performance can be improved by this method. The experimental results show that this system has advantages of high-precision control characteristic and enhancing the system robustness.
An 8-Bit 1.72-Gsample/s Two Channel TimeInterleaved Analog-to-Digital Converter Based on PCB Circuit Board
Authors: Wu Jin , Wu Dan Yu , Jiang Fan , Yu Yang , Zhou Lei , Liu Xin Yu , Wu De Xin
Published: July 2013

This paper reports an 8-bit 1.72-Gsample/s TimeInterleaved analog-to-digital converter (TIADC) based on PCB with Field Programmable Gate Array (FPGA) technique. The system integrates two independent designed 8-bit 0.9-Gsample/s ADC chips in parallel, commercial FPGA and multi phase clock distributor circuit. In order to increase the systems performance, online calibration method is proposed to calibrate the mismatching errors in TIADC. The utilization of the FPGA is proven to be effective in removing the offset & gain mismatch; the clock distributor circuit is used as the time delay for each Sub-ADC chip to eliminate the sampling-time error. The hardware design features are also described in details. The ADC chip is fabricated in 0.35 um SiGe BiCMOS. Finally, experimental results reveal that the proposed system is capable to be operated up to 1.72GSps.Under this sampling frequency (1.72GHz), the system can achieve spurious free dynamic range (SFDR) which is larger than 40dBc. The effective code (ENOB) is lager than 5.5 bit from DC to Nyquist frequency and the power dissipation is 2.28 W.
Generation and Circuit Implementation of Grid Multi-Scroll Chaotic Attractors
Authors: Zhang Chao Xia
Published: July 2013

In this paper, grid multi-scroll chaotic attractors are firstly generated. The maximum Lyapunov exponent is further calculated to prove the existence of chaos in designed system. An improved module-based circuit is designed for realizing 5×3 grid scroll chaotic attractors, and the experimental results are also obtained, which is consistent with the numerical simulations.
A Novel PA Behavioral Modeling Using Memory Rational Function
Authors: Jian Chun Xiao , Wang Hui , Li Gao Sheng , Liu Pei Guo
Published: July 2013

Aiming at the nonlinear characteristics and memory effects of power amplifier, a memory rational function behavioral model, which based on the memory polynomial model and memoryless rational function model, is proposed. The model coefficients are identified by conjugate gradient method. The estimation of the best model nonlinearity order and the best memory depth is carried out by minimized the normalized mean squared error (MNSE). The model is validated using multi-carrier WCDMA signal and a MRF6S21140H power amplifier by measurement. The result indicates that the proposed model can achieve better model performance with less number of coefficients compared to the memory polynomial model and memoryless rational function model
Research on Path Selected Method in MultiTask-Point Road Networks Based BPR Function
Authors: Li Feng Biao
Published: July 2013

It is very difficult for commander to select an optimized march path when multi-team marched to given-task-point in a complex road network. The modified BPR function including road service parameter and teams amount is built, an optimize path selecting method is put forward, All teams runtime are contrasted between centralized march and self-determination march, results showed that commander’s dispatching ability is very important for completing the march task.
Design and Implementation of High-Dynamic Satellite Channel Emulator
Authors: Wang Xuan Tao , Chen Chao
Published: July 2013

This paper designed a dedicated channel emulator that can be used for high-dynamic satellite channel performance testing. First of all, introduce the characteristic of satellite channel. Secondly, focusing on the analysis of Lutz model, we give the system model of the satellite channel simulation. Finally, according to the model of the system, the realization method based on FPGA platform would be given, the solution of key technology would be described and the test data would be provided.
Next Generation Wireless Multiple Access Technology OFDMA and SC - FDMA Performance Analysis
Authors: Wan Lin
Published: July 2013

orthogonal frequency division multiple access (OFDMA) and single carrier frequency division multiple access (SC - FDMA) are the two kinds of 4 g wireless multiple access scheme. In the long term evolution (LTE) downlink link access scheme based on OFDMA, at the same time, the uplink access scheme based on SC - FDMA. In this article, we deduced the OFDMA and SC - FDMA basic performance difference, and then demonstrates the comprehensive performance comparisons between them. Theoretical derivation results show that the system capacity is better than that of SC - FDMA OFDMA. Then, we use the numerical simulation results confirm the conclusion. Keywords: OFDMA SC - FDMA basic capacity of the uplink transmission
Real-Time Wireless Water Quality Monitoring System Based on MODBUS Protocol
Authors: Zhang Yun , Zhang Fei , Hong Zhong Hua
Published: July 2013

Recently, the environment problem has been more serious, especially the water-quality problem. In this paper, we develop the portable water-quality monitoring terminal, which can collect and real-time transmit water-quality parameters. The monitoring center received the data based on Modbus protocol by using wireless radio station. System structure and transmitting data frame are discussed here. The paper also introduced the monitoring software function in the monitoring center. The result of system test proved that the water-quality terminal can transfer the data to the remote monitoring center for a long time successfully, the system can achieve real-time and on-line water-quality monitoring functions.
Communication Study in Track Circuit System in One Line in Shanghai Metro
Authors: Liang Jian Ru , Wang Yu Ming , Chen Wen Jie , Shi Cong , Lu Xin Yuan
Published: July 2013

This paper introduces the signal data acquisition method of the FSK signal using NI equipment in the track circuit system, and the FSK signal modulation demodulation based on LabVIEW . The track circuit communication detection device for Shanghai metro line 2 provided effective means, saved maintenance costs, created the economic benefit and laid the foundation for subsequent signal detection. solved the problem that without special equipment detection in wayside, it can also realize the results of detection intuitively and the quantitative analysis of technical index
Design and Implementation of Dual-Mode Correlator IP Based on SoC
Authors: Du Ke Ming , Li Bin , Xing Ya Nan
Published: July 2013

The SoC design is a tendency which the navigation and positioning receiver circuit design, its key technologies, including bus architecture technology, IP core design and multiplexing, in which the correlator IP core design and reuse is crucial for navigation and positioning receiver. This paper describes the operating principles and structures of the SoC bus architecture and navigation-positioning correlator, and the various modules of the correlator and the Galileo/GPS navigation signal are analyzed; On this basis, to design Galileo/GPS dual-mode correlator IP core using SoC-based IP core design method, and to simulate and analyse, it can be easily applied to the navigation and positioning receiver baseband SoC design.
Design of Intelligent Windows Based on Power Line Carrier and GPRS Communication Technology
Authors: Zhang Xu Hui , Tang Zhen Zhen , Zhong Ding Long , Gao Bao Jiang
Published: July 2013

Aiming at the problem of traditional windows need manual operation, intelligent windows system based on power line carrier (PLC) and GPRS wireless communication technology was designed. The system used PLC technology realize the establishment of the internal network; Used varieties of sensors as peripheral detection devices and data acquisition equipment, transmitted collected data to central controller through the power line; Used ARM9 embedded processor S3C2440A as center controller; Used GTM900C module as interface between internal network and external network, passed data and forwarded control commands. Terminal PC used LabVIEW graphical programming language, it could receive GPRS signal coming from Internet according to the fixed IP address and port number, and sent monitoring commands to the fixed IP address. This paper listed out hardware block diagram and software implementation process. The design concept can spread to other intelligent households. The experimental results suggest that the intelligent windows have implemented smart windproof, rainproof, anti-theft, fire prevention and prevent gas poisoning. It provided a good solution for the design of smart home.
Application and Research of Routing Protocol Based on AODV in Cognitive Radio
Authors: Chen Yi Xian
Published: July 2013

With the rapid development of science and technology, the current spectrum resources can not simply cope with the high-load wireless networks transmission. In addition, because the use of spectrum resources can not be fully maximize the overload load phenomenon, which leads to the waste of resources and loss of the spectrum, the existing overall spectrum resources are not adequate utilization and its utilization can not be improved. Obviously, in order to meet the growing demand for Internet and wireless communications, we must address the low rate of utilization of spectrum resources To this end, it is proposed to use the spectrum resources in cognitive radio drainage techniques, cognitive radio node to perceive the change of radio spectrum resources, and thus connected in the most appropriate timing and spectral integration, the effect of radio data transmission, and adequately addressed the problem of the spectrum resource low utilization. This thesis is based on the in-depth analysis of cognitive radio technology to understand the routing protocol in wireless cross-layer data transmission, and then discuss the relevant characteristics of the AODV routing protocol, and base on the AODV, the routing protocol uses in the analysis of the radio network organization based on the proposed to the possibility of cognitive radio.
Study of Load Shedding by IEC61850 Implementation
Authors: Ke Yi Kuan , Huang Pei Hwa
Published: July 2013

The main purpose of this paper is to study the implementation of load shedding under the condition of IEC61850 (Communication Networks and Systems in Substations) communication exchange in the power system. The strategy of load shedding with IEC61850 GOOSE (Generic Object Oriented Substation Event) message relies on fast transmission of the signal to shed unstable regions for maintaining system safety. The current strategy for load shedding in the substation is to use hardwire and dispatch solutions to implement related applications of load shedding. For integrating protective relays in substations, IEC61850 GOOSE schemes can customize both a ring and a star construct based on TCP/IP Ethernet to have flexible dispatch of smart grid solutions. The functions of relay integrated with the GOOSE message play important roles to implement peer to peer communication to accomplish the load shedding strategy.
Research on the QoS Routing Protocol Based on ACO Algorithm
Authors: Gan Quan , Sun Qiong Qiong
Published: July 2013

Wireless multimedia sensor network routing protocols based on ant colony optimization algorithm (ACOQoS) is proposed. Based on the existing routing protocol design concept, and the actual needs of QoS from each network layer of wireless multimedia sensor networks, the protocols use the Agent collection method to select cluster head node, from the perspective of the balance network load. And maximize the network lifetime by balanced use of energy of the whole network.
A Channel Allocation Algorithm Based on Minimum Interference in Wireless Mesh Network
Authors: Ge Zhen , Jiang Yi , Sun Hong , Shi Jia Xi , Luo Xi
Published: July 2013

Channel allocation based on multi-interface is a very important and difficult problem. Network throughput needs to be maximized while full consideration should be given to interference reduction and network connectivity. To solve this problem, the extended conflict graph was utilized to establish the link interference matrix; the frequency assignment technique in spectrum management based on greedy algorithm was introduced for channel allocation, and a channel assignment algorithm based on minimum interference was proposed. The algorithm fully considered link interference situation, and selected the link which currently suffers the minimum interference. For the selected link, select the idle channels when there are sufficient channels; select the channels with least potential interference when there are no idle channels. Based on this strategy, the link interference is effectively reduced, the number of links that can work simultaneously is increased, which fully maintained the connectivity of the network and effectively improved network throughput. Simulation results show that this scheme can effectively improve the performance of overall network.
A Discussion about FBG Sensors Application of Crane SHM System
Authors: Xie Xiao Peng , Wang Dong Hui , Huang Guo Jian , Wang Xin Hua
Published: July 2013

The arrangement positions and the quantities are different for different types of cranes. In order to make suitable decision, much investigate and survey was done at preliminary stage, and we know that the flange connected gate legs and turntables, the connections between load-bearing beam and rotary column under the engine room and the connections between jib and turntable are easy to lose efficient, and their mainly failure modes are cracks. By the method of finite element, 32 sensors (including 21 welding strain FBG sensors and 11 temperature FBG sensors) were used after doing much investigate and survey and finite element modeling analysis, which are arranged in different places of a gantry crane of MQ2533, for real-time structure health monitoring. This method makes the sensor data obtained more realistically reflects the crane structural condition, which provides reliable data support for crane safety monitoring and safety evaluation. Then a software platform is developed to monitor the real-time stress. If the real-time stress exceeds the allowable stress, it issues an alarm signal to the operator.
Efficiency Reverse Converter for 4-Moduli Set {22n, 22n+1-1, 2n+1, 2n-1} Based on New CRT-II
Authors: Siao Siang Min , Kuo Yuan Ching , Sheu Ming Hwa , Lin Xin Kun , Chen Tzu Hsiung
Published: July 2013

In this paper, the new 4-moduli set {22n, 22n+1-1, 2n+1, 2n-1} with 6n-bit DR, which is appropriate for RNS applications. An efficient algorithm for residue-to-binary conver­sion is derived based on New Chinese remainder theorem II (New CRT-II). Next, the converter hardware is also designed to achieve average 36.6% performance saving in terms of the Area× Delay when comparing with the latest converter with 4-moduli set under the same DR require­ment.
Research on High Reliability Communication System Witch Based on Hardware Watchdog
Authors: Zhao Hua , Cao Wen Wen
Published: July 2013

During the operation of transmission line communication system, the software failure is a very important and difficult issues. The event, usually requires a manual reset troubleshooting by climbing the pylons. This article describes the hardware watchdog technology , which can obtain high reliability and effectively reduce the cost of equipment maintenance for communication devices.
Multi-User Detection Based on Improved KICA with Bat Algorithm
Authors: Liu Xiao Zhi , Li Jing
Published: July 2013

In this paper, an improved kernel independent component analysis (KICA) algorithm is proposed for multi-user detection (MUD). In this algorithm, a new hybrid kernel function is adopted. In addition, the bat algorithm is applied to the optimizing process of independent component separation. Simulation results show that the new hybrid kernel function performs better in MUD than other kernel functions, and the improved KICA with bat algorithm has the smallest bit error rate (BER) when compared with classical FastICA and KICA algorithms.
Digital Implementation and Simulation of the ZVS Control Scheme
Authors: Liu Bai Fen , Gao Ying
Published: July 2013

Digital control algorithm common neural networks, fuzzy control, digital PID digital PID technology used widely and mature, the digital PID proportional, integral, derivative control the abbreviation. These advantages: simple in principle, applicability; little within the small range of the controlled object parameter changes on the performance indicators, a great guarantee the validity of the regulation. PID is the most successful control strategy in the analog control technology, digitized; people naturally will this control strategy is grafted onto the digital control technology. The system is digital PID.Used to implement a digital control chip has many, e.g., microcontroller, field programmable gate arrays (FPGAs), digital signal processor (DSP) and the microcontroller (ARM). SCM is the first large-scale application of the controller, but due to the speed of operation and the median can not meet the growing industrial control requirements. .
Implementation and Design of Underwater Duplex Speech Communication System Based on Vector Hydrophone
Authors: Cui Hua Chao , Zhao An Bang , Zhou Bin , Sun Kun Ping , Cui Yan
Published: July 2013

This paper realizes 1.2kbps Mixed Excitation Linear Prediction (MELP) speech compression algorithm through multi-frame joint and Vector Quantization technology. In order to adapt to underwater acoustic channel, we apply the Orthogonal Frequency Division Modulation (OFDM) to modulate the source bits, together with synchronization, channel estimation and RS error correcting code technology. The hardware platform of this system relies on TMS320DM642 and AIC23. Moreover, we introduce single vector hydrophone to restrain the local source. The system finished duplex speech signal acquisition and transmission and tank test results prove that the synthesized speech is clear and understandable and it has a stable performance.
Predicting System of Flying Squid in North Pacific Based on the Bayesian Theory
Authors: Tang Feng Hua , Zhang Sheng Mao , Yang Sheng Long , Cui Xue Shen
Published: July 2013

Based on the yearly catch data (1994~2011) of Chinese fishery and inversed SST from satellite remote sensing in North Pacific Ocean, we developed the predicting system of fishing grounds using Bayesian probability theory. The system used the client/service mode; while the database used the SQL Server 2000 data management system combining with the Control type GIS technology. The precision verification using historical catch data was conducted and the results showed that the prediction accuracy of fishing and non-fishing ground were 69.46% and 57.15%, respectively, and the total average predict rate of accuracy was 63.31%. The predicting system showed important advising significance in foresting fishing ground and fishing activity of the flying squid in North Pacific Ocean.
Design and Application of the Plug-in for Charging Facilities Monitoring Configuration Software
Authors: Zhang Bei Bei , Sun Guang Ming
Published: July 2013

Introduced the characteristics of monitoring for the electric vehicle charging facilities, analysis of the model structure and the plug-in structure. Determined software architecture of platform and plugin for charging facilities monitoring configuration software. Elaborated on the interface design, workflow and application examples of plug-in in the configuration software. Engineering practice has proved that the configuration software through the use of plug-in technology to improve the degree of modular, a powerful expansion function, plug-and-play and to meet the needs of different users.
Data Conversion Technique of Heterogeneous System Based on ESB
Authors: Ma Wen Long , Zheng Jian Wei , Zheng Shu Tian
Published: July 2013

Based on the analysis of general data conversion techniques of heterogeneous System, an application framework based on ESB is proposed in order to achieve data conversion in heterogeneous system. The structure of data converter, conversion technique of unstructured data, service description workflow used by WSDL and method of messaging are discussed. Experimental results show that the technique has some of advantages in solving data conversion in lightweight heterogeneous system.
Research and Development of Vision Measurement System with Marked Targets
Authors: Li Zhan Li , Han Zhou
Published: July 2013

Aiming at the problem of 3D measurement to product in industrial, a vision measurement system with marked targets is researched and developed. The system is a 3D visual system based on a basic principle of close-range photogrammetry. After shooting objects with mark targets by a digital camera, the digital image processing and vision measurement processing are used to detect and match the marked targets in order to locate the geometry precisely. The system achieved the main function of image preprocessing, target center location, feature matching, camera calibration, 3D reconstruction and precision evaluation. Proved by the experiment, the system can reduce the dependence on hardware equipment, measurement environment and professional technology, and obtain stable and precise 3D reconstruction results, which can be applied to the calculation of monitoring point.
UML-Based Modeling for the Production and Dispatching System of Provincial Measurement Center
Authors: Chu Peng Fei , Li Tian Yang , Rui Dai
Published: July 2013

In this document, we describe the characteristics of UML and modeling process in brief, building the use case model, static model and dynamic model based in UML, then accomplish the requirements analysis and system design of the Production and Dispatching System of Provincial Measurement Center.
An Transfer Latency Optimized Solution in GPU-Accelerated De-Duplication
Authors: Zhu Rui , Chen Chang Nian , Qin Lei Hua
Published: July 2013

Recently, GPU has been introduced as an important tool in general purpose programming due to its powerful computing capacity. In data de-duplication systems, GPU has been used to accelerate the chunking and hashing algorithms. However, the data transfer latency between the memories of CPU to GPU is one of the main challenges in GPU accelerated de-duplication. To alleviate this challenge, our solution strives to reduce the data transfer time between host and GPU memory on parallelized content-defined chunking and hashing algorithm. In our experiment, it has shown 15%~20% performance improvements over already accelerated baseline GPU implementation in data de-duplication.
Research on Disaster Recovery Model of Cloud-Based Digital Library
Authors: Tang Kai
Published: July 2013

Cloud-based digital library has achieved an efficient storage of massive digital resource, reduced the cost of management and maintenance, improved the sharing of information resources between digital libraries, and provided a convenient and rapid service for the users. Cloud storage architecture has the features of high reliability, high performance, high expansibility, etc. In order to ensure the security of information resources and the continuity of information service in Cloud-based digital library, the paper constructs disaster recovery system model of cloud-based digital library to ensure data security and business continuity. The model has dynamic scheduling, standard access interface, dynamic memory management and other functions.
Research on the Data Format Standard of IoT Based on XML
Authors: Peng Ying , Wang Fang
Published: July 2013

Currently in the application level of Internet of Things (IoT), relevant data format standards are very complicated and every relational subject goes his own way. To solve this problem, this paper, from the view of XML and G/S model, started with the relationship among Internet, Semantic Web and IoT and then put forward the way of building the IoT data format standardization system. The IoT data format standardization should be based on XML for syntax and on G/S model. Data Exchange Standards System of the IoT should adopt XML as its grammar format. Finally, the system (base on MSML) with a specific application is illustrated.
Application of WebGIS Technology in Digital Urban Planning System
Authors: Yang Ze Yun , Yang Jin Ling , Cao Xian Ge , Liang Xin , Li Xiu Hai , Huo Chun Ling
Published: July 2013

WebGIS is one of the key technologies in the process of Digital City informational, networking, intelligent and visualization. This paper mainly introduced the concept of WebGIS and digital urban planning at first and then in detail interpreted the design, structure and functions of the model system of digital urban planning system based on WebGIS, and carried on a preliminary test, finally discussed the application prospect of WebGIS in the urban planning area.
A Software Model by UML for Highway Monitoring System
Authors: Liu Yong , Yuan Li Yan
Published: July 2013

In order to improve the efficiency of designing monitor system software and modeling with UML, the UML application of software system modeling was researched in theory and practice. The whole process is divided into four steps, which are the global analysis, the local analysis, the global design, and the local design, and the GUI of the system is described at last. A distributed highway monitoring system is analyzed and designed by UML.
The Research of Web Clustering Algorithm Based on Binarized Zipf's Law
Authors: Wang Rong , Zhang Bo Ping
Published: July 2013

This paper analyzes Web clustering firstly, then proposes to describes the object using binary property for users clustering in Web clustering. Makes the time property Binaryzation using Zipf's Law, then clusters the object using ROCK Algorithm. Experiments can prove that the work for clustering is well.
The Determination of the Uniqueness of Polymorphism in C++
Authors: Liu Meng Ting , Mu Yong Min , Dong Wei Na , Fan Bin , Ma Li Ni
Published: July 2013

The polymorphism is the one of the main features of the object oriented program. The compiler determines the uniqueness of polymorphism by dynamic binding. In a static source code, there will be one function calling point corresponding to several called functions. As the consequence, there will be many redundant function calling paths. It is the key to improve the efficiency of the path coverage test based function call graph with control logic determining the uniqueness of polymorphism. This paper analyzes the feature of the polymorphism in C++ and proposes an algorithm to determine the uniqueness of polymorphism statically in C++. The algorithm can find the unique called function from the several called functions without running the program. The result shows that the algorithm can obtain the unique called function correctly and eliminate the redundant paths. It improves the testing efficiency and reduces the testing cost.
Two Partitioning Algorithms for Generating of M Sets of the Frieze Group
Authors: Wang Feng Ying , Du Li Ming , Han Zi Yang
Published: July 2013

Symmetric features of the frieze group equivalent mappings were analysed, and two partitioning algorithms are given for constructing generalized Mandelbrot sets of frieze group equivalent mappings in order to study the characteristics of generalized Msets. Based on generating parameter space of dynamical system, lots of patterns of generalized Mandelbrot sets are produced.