bluuebunny/crossref_metadata_2025 huggingface dataset:
IBperf: A Testing and Evaluation Model of IB Datacenter Transmission Control
Authors: Zhang Zi Wen , Sun Zhi Gang , Lu Xi Cheng
Published: December 2012

Datacenter is the important infrastructure to provide resource and service in Internet. Due to the widely observed congestion, all kinds of transmission control mechanisms have been proposed to satisfy diverse network performance demands. Based on InfiniBand (IB) which is widely applied for datacenter construction, this paper proposed a generic testing and evaluation platform IBperf to verify transmission control protocols. We designed a central controller to instruct distributed clients to generate different communication patterns and execute commands of the protocol. The transmission performance can be derived based on the captured packets and digest. In the experiment, IB congestion control (CC) was evaluated through IBperf on our real IB platform. IBperf showed the improvement of fairness and throughput with low overhead based on CC mechanism. It proved IBperf to be an effective tool for the evaluation of IB datacenter.
Research on Application of High-Speed Data Acquisition System for AC Rail Flash-Butt Welding
Authors: Lv Qi Bing , Tan Ke Li , Dai Xiao Gang , Zhang Xi
Published: December 2012

Data acquisition system of the flash-butt welding machine had been designed for sampling current and voltage data during welding process. Software, which could sample and analyze the welding data easily, has been developed based on LabVIEW and Visual Basic. The acquisition system could sample, store and query the welding current and voltage data, as well as display the real-time waveform of them. By analyzing welding data and waveforms, we could extract characteristic signals over all phases, including flash stability, input heat and plus-minus symmetry of current waveform. Further more, he characteristic signals’ extracting and current waveform’s analyzing, could be used to instruct the welding processing debugging and the diagnosis of equipment failures, especially the failures which was difficulty to be found with conventional methods.
Biquaternion Model of Vector Hydrophone Array and DOA Estimation Algorithm
Authors: He Guang Jin , Cheng Jin Fang , Zhang Wei
Published: December 2012

In the traditional vector data expressions, the outputs of a single 3D vector hydrophone are reorganized into a complex vector, which cannot retain the orthogonality of the velocity elements. In this paper, biquaternion formalism is used to model the vector hydrophone’s output and a novel MUSIC-like algorithm is proposed to estimate the DOA (Direction-Of-Arrival) of the sources. The three velocity channels outputs are placed in the imaginary parts of the biquaternion numbers, which retains the orthogonality of the particle velocities and is robust to correlated/coherent noises. What’s more, the biquaternion data model has a compact way of handing multi-component data, which results a much less memory requirements compared with the traditional approach.
Measurement Error Detection, Elimination Method and its Application
Authors: Ren Xiao Ping , Xue Zhi Chao , Zhao Ke
Published: December 2012

Bullet mark comparison is one of the key techniques in the discovery of evidences. A bullet mark comparison method was presented in this paper. First the bullet marks data are gathered according to generally used equipment. There are many coarse data cannot be used in matching process, so a preprocessing on the raw data is need. A statistics modeling is set up to construct a cost function, which can be used to evaluation choose of error until the cost function get minimum value. Experiment showed this comparison method can solve comparison problems of bullet mark.
Technology Research of Digital Closed-Loop Fiber-Optic Gyroscope
Authors: Yang Dong Sheng
Published: December 2012

Digital fiber-optic gyroscope with linear scale factor, phase high accuracy, dynamic range, etc. This article proposed one kind of closed-loop digital fiber optic gyroscope system based on DSP, and designs the closed-loop fiber-optic gyro for signal detection and processing circuit, and the whole digital closed loop of fiber optic gyroscope light path part and circuit of the concrete analysis. With DSP as logic circuit, make the gyro operation speed and reliability have improved greatly.
Synchronization of Multi-Chaotic Systems with Ring and Chain Intermittent Connections
Authors: Zhang Qun Li
Published: December 2012

Based on the intermittent control and the nonlinear measure about l 2-norm, a novel and effective approach to synchronization of multi-chaotic systems with ring and chain connections is investigated. The proposed approach offers a design procedure for multi-chaos synchronization of a large class of chaotic systems. Numerical simulations of multi-chaotic Lorenz systems are given to illustrate the main results by choosing appropriate coupling coefficients by using the intermittent controllers.
Application of a New Type of Composite Adaptive Controller in the Lithium Battery Charging System
Authors: Zhang Jing , Liu Gen Wang , Zhu Zhao Xuan
Published: December 2012

In order to solve problem in lithium battery charging system about uncertainty and difficulty of setting of the parameters, a new method of compound controller of fuzzy + variable universe fuzzy-PID based on ant colony algorithm optimization is proposed. When the system fluctuates frequently, the fuzzy control enables the system to have the most superior dynamic performance; when the system enters the stable phase, variable universe adaptive fuzzy-PID control improves the accuracy of the system. Ant colony algorithm is applied to optimizing the values of PID parameter offline. The offline optimized values are used as the primary values for online adjusting and they can make the system more stable. The proposed compound control strategy is applied to the lithium battery charging system. The simulation result shows that the system has features of anti-disturbance and robustness.
Application of LS-SVM Control Model in Circulating FLuidized Bed Electric Power Generation Process
Authors: Gao Ming Ming , Liu Ji Zhen , Li Kai Yang , Zhu Yu Wen , Zhou Yong , Mo Hong Jun
Published: December 2012

The model of circulating fluidized bed (CFB) electric power generation process based on dynamic method which needs a lot of parameters, but these parameters are usually not easy to get. A model method based on least square support vector machine (LS-SVM) which directly uses the experimental data is presented to overcome the weakness of mechanism model, and the system structure and algorithm are given. Compared with the experimental data, the simulation results show that this method has good performance and can provide control and optimization reference to the CFB electric power generation.
Research Self-Adjusting T-S Fuzzy Control System Based on LS-SVM Online Prediction on CFBB
Authors: Gao Ming Ming , Liu Ji Zhen , Zhang Xuan , Lei Xiu Jian , Tang Jun , Zhong Jian Wei
Published: December 2012

Automatic control system of circulating fluidized bed boiler (CFBB) is considered that has long combustion lag characteristic, instable parameters and difficult to formulate a mathematical model. A T-S fuzzy controller according to the study of fuzzy control based on proportional factors is put forward. The value of each proportional factor is verified by experiment and an online adjusting rules are made. The controller can distinguish the forecast output of least square support vector machine (LS-SVM) and adjusts the proportional factors by the rules. To verify the control effect, the model is simulated with matlab. The results reveal that the control effect is superior to normal control system.
Longitudinal Control Law Design and Simulation of Fixed-Wing UAV
Authors: Duan Zhen
Published: December 2012

Taken some fixed-wing UAV as the study object, the aircraft movement was broken down into the longitudinal movement and lateral movement according to the linearized small perturbation principle, the longitudinal control law design method was discussed using root locus which belonged to classical control theory. The six degrees of freedom nonlinear model simulation result shows that: the control parameters designed are reasonable, the simulation profile is fully consistent with the setting profile, the control effect of pitch angle loop and altitude loop meets with the indices requirements, the method is mature and reliable, easy to realize in engineering.
A New Complex Incident Response Plan Decision-Making Model
Authors: Liu Ping , Xu Bo Yi , Hu Fang , Yu Hai Feng , Li Jin
Published: December 2012

Abstract. Taking the botnet incident response plan decision-making as an example, we construct a new model by using action decomposition. In this model we introduce action layer, relation between sub-actions and decompose the complex incident response plan into many layers. This model provides a graphic representation of the complex plan. By analyzing the decomposing method and the action node structure, we prove that the store space size of this graphic representation is not increased exponentially when the action node added.
Manufacturing Error in the Application of Improving Spectrum for a Vertical Coupling Microring Resonator
Authors: Wang Yu Hai , Qin Zheng Kun , Wang Chun Xu , Wang Li Zhong
Published: December 2012

All the effects of manufacturing errors on transmission spectrum are analyzed for a vertical coupling microring resonator (MRR). Results show that the core refractive index, core thickness and radius errors of ring result in central wavelength shift of the transmission spectrum, and the central deviation and thickness between the ring and channel lead to nonresonant light intensity change. In order to obtain satisfactory spectrum for a fabricated MRR device, some allowed manufacturing errors are discussed, and the accumulation and compensation of manufacturing errors are investigated.
Design of DC Motor Speed Control System Based on SOPC Technology
Authors: Yao Yi , Jia Jin Ling , Chen Guang Jian , Wang Xian Hai
Published: December 2012

The paper describes design technology of FPGA and design method of SOPC, and designs DC motor speed control system based on SOPC technology. To be more specific, it includes establishing a Nios II embedded system on FPGA for which PWM, tachometer module and relative driver are customized. It also applies C language programming to actualize PID control algorithm, and conducts simulation on main system module functions.
Guaranteed Cost Control of Multiple-Time-Delay T-S Fuzzy Descriptor Systems
Authors: Li Yan Long , Zhang Zhong Lin , Tian Wei Hua , Wang Yan
Published: December 2012

In this paper, we focus on the problem of guaranteed cost control for a class of nonlinear systems described by the Takagi-Sugeno (T-S ) fuzzy descriptor model with multiple time delays. A quadratic cost function is used as a guaranteed performance index. The descriptor type of Lyapunov-Krasovskii functional is employed to analyze the asymptotic stability and design the guaranteed cost controller. The sufficient conditions for the existence of the guaranteed cost controller are given in terms of LMIs. At last, an illustrative example is provided to show the effectiveness of the proposed method.
Time Delay Estimation on COREX Parameters Based on Dynamic Time Warping Method
Authors: Zhao Chen Xi , Xu Jin Wu , Li Min , Yang Jian Hong
Published: December 2012

In order to solve the time delay problem between the process parameters and the quality indicators in the modeling processes, a method of time delay estimation on COREX parameters is proposed based on Dynamic Time Warping (DTW) algorithm. The method solves the problem existing in the conventional methods which demand the number of calculating sample to be same. Taking the real field data from Baosteel COREX-3000 as the research object, the DTW distances between the process parameters and the quality indicators are calculated, and then the delay time is estimated. The real field data are used for verification, the results show that the proposed method can estimate the time daley effectively, and the prediction accuracy of model which used time delay estimation becomes higher. It provides an effective measure for model preprocessing.
Design and Implementation of Goalkeeper Defensive Strategy on the Soccer Robot Simulation Game
Authors: Zhang Shu
Published: December 2012

Robot soccer is a new research topic of artificial intelligence. The robot soccer game can be simply simulated by software. As the core part of defensive strategy, the goalkeeper's defensive is also a difficult subject in the soccer robot game. The site is devised by the rules, and the area of ball is as the center. This strategy does not consider the other player's position as well as their overall offensive state. It is not adopt to determine some special cases. A novel defensive strategy of goalkeeper is designed, and the experiments in different arithmetic are done and the results are noted. It needs to be further improved in guarantee real-time performance
Research on RBF Neural Network of Wet Cooling Tower Under Cross-Wind Conditions
Authors: Gong Rui Kun , Wang Chong Hao , Zhao Li Jing , Zhang Ya Nan
Published: December 2012

Brief description is given of existing appraising methods for the performance of cooling tower and their shortcoming firstly. Then the mathematics model of cooling tower operation performance is given by means of relative perfect RBF neural network. Comparing with the usual linearity and non-linearity cooling tower mathematics model, the RBF neural networks mathematics can more truly reflect cooling tower operation performance. This conclusion is valuable for giving a more true and simple method for appraising the operation performance of cooling tower. In this text, we consider that cross-wind effect operation efficiency, the complex process of heat and mass transfer between gas and water is easily effected by the air temperature of surroundings,humidity and the influence of cross-wind.
The Design of Performance Testing System for Small Motors
Authors: Li Tao Yong , Xue Jin Hui , Du Jin Ping , Rong Hai , Fan Ying
Published: December 2012

This paper provides an overview of the sort of motor’s losses, analyzes and expatiates on several methods of testing for efficiency, designs a set of scheme for motor energy efficiency testing. The test platform can achieve the aim of resistance measurement, temperature measurement, power analysis and data processing and other test. The system can further improve the authentication level of the motor, system testing results can provide the basis for the relevant departments of the state. Practical application shows that the detection result of this system is reliable and accurate.
Application of Kalman Filter in the Attitude Four-Axis Aircraft Control System
Authors: Cui Xuan , Fan Zhong Yan , Sun Hua
Published: December 2012

Attitude control is the core of the four-axis aircraft flight control，By analyzing the principle of four-axis aircraft flight，this paper, on the basis of the traditional method ,acceleration sensors to obtain data, we use the Kalman filter method, fuse acceleration sensor data and gyroscope data, MCU as the core of the inertial measurement unit test，The results showed that，The aircraft can be better stabilized at the test platform, can achieve the requirements of attitude control of the four-axis aircraft.
Simulation Study on a New Type of Cooling Device Used in Heat Dissipation of Server
Authors: Guo Chao , Wang Fang , Qu Yan , Jin Na
Published: December 2012

A new type of cooling device used for server is designed in this paper. A server is used as a research object. A mathematical model of thermal analysis is established and a temperature distribution is simulated for this case. Then simulated heat dissipation effects of air cooling and evaporative cooling are compared to analyze the feasibility of the plan of forced convection evaporative cooling. The results show that the temperature distribution obtained in the case is more uniform and the temperature of the CPU is more stable when cooled by forced convection evaporative cooling.
Analysis of Pressure Field for Flow Past a Circular Cylinder with a Slit
Authors: Wang Hui , Huang Yong Mei , Lin Min
Published: December 2012

The signal strength, linearity, stability and measurement range of vortex flowmeter are primarily decided by the shape and geometrical parameters of bluff body. A circular cylinder with a slit was found to produce better vortex signal properties by experiments. Based on previous research, pressure distributions of flow past a circular cylinder are studied by numerical simulation. It is found that the intensity of pressure fluctuation caused by vortex shedding of the circular cylinder with a slit is stronger than that of circular cylinder and 0.2d downstream from the center line of slit at one side of cylinder is found to be an optimal position to detect the vortex signal, where d denotes the diameter of the cylinder. Finally the evolution process of vortex shedding is analyzed to explain why the intensity of pressure varies at different positions.
Durability Testing System with Power Recycle for the Variable Displacement Closed-Loop Hydraulic Pumps
Authors: Wang Hua Bing , Hu Jun Ke
Published: December 2012

A testing system scheme with power recycle for hydraulic pumps’ durability is present, which is based on a hydraulic motor with hydraulicly overridden pressure compensation. The hydraulic motor can adaptively adjust its displacement to meet the demand of displacement match of the power feedback in the system. The system pressure can be set by adjusting the starting control pressure of the motor. The rotating speed of the pump is guaranteed by the control of the driven electrical motor. A hydraulic bridge unit is used to guide the flow from the outport of the pump to the fixed inlet port of the hydraulic motor and thus causes the motor to rotate in a certain direction to drive the pump in order to recycle the power.
3D Rotary Model Design Based on Accelerometer
Authors: Qian Li
Published: December 2012

Accelerometer is the important sensor of MEMS inertial sensors and is applied in many occasions. A three dimension model is designed to accomplish rotary motion in 3D space and the model is introduced to the computer input system to enhance the functions of the computer input system. In order to indicate the feasibility and effectiveness, a Demo platform with AVR controller is designed to control the rotary motion of accelerometer solid model.
Development of Exclusive Controller and HILS for Active Magnetic Bearing System
Authors: Go Seok Jo , Kim Chi Yen , Park Min Kyu , Lee Young Jin , Yao Bin
Published: December 2012

The active magnetic bearing system has been studied for long period. Comparing with long research history, the AMB application into industrial field is shown slowly for various causes. One of primary factor is to make up exclusive controller which can generate fast linear current output. Thus, this paper developed the exclusive AMB controller mounted high speed DSP which can operate so fast control calculation that improve system response ability. Especially, to consider the fusion of AMB system and control software, the development is conducted in HILS system with dSPACE from the beginning. Although HILS system is adopted, the developed ABM controller simplified the whole system and could make up optimized control algorithm promptly by measuring and applying the system gain and characteristics of them monitored by the HILS system in real time.
Vibration Frequency Fuzzy Adaptive Control of the Flexible Lunar Regolith Sampler Based on the Dynamic Pediction by Uing the RBFNN
Authors: Lu Wei , Zeng Hong , Song Ai Guo , Ding Wei Min , Ling Yun , Xu Bao Guo
Published: December 2012

The drilling efficiency can be improved effectively by controlling the lunar regolith sampler always in the resonance state. But the dynamical modeling of the sampler-regolith system is difficult to obtain and time varies when the sampler is in different depth in the lunar regolith. For the nonlinear time-varying system of the dynamic modeling of the sampler in drilling, we present a method of the vibration frequency fuzzy adaptive control based on the dynamic prediction by using the RBFNN. The Radial Basis Function (RBF) neural network with a FIR filter in series is used to predict the resonant frequency dynamically and decrease the overshoot. And the fuzzy adaptive control is used to calculate the sweeping frequency bandwidth with the input of the amplitude and variation. The simulation results have verified the effectiveness of the control strategy. The experimental results show that the control algorithm can improve the drilling depth, drilling efficiency and the discarding efficiency effectively.
Study on Groundwater Level Testing System Based on Wireless Network in Irrigation Region
Authors: Zhao Bin , Yi Shu Juan , Kuang Li Hong
Published: December 2012

Groundwater level data in paddy rice irrigation region are the important basis for rational utilizing groundwater resource. According to current situation of backward measuring methods to groundwater level in irrigation region, and the characters of monitoring sites dispersion and long distance, distributing control system structure was applied. The microcomputer served as upper machine manages the lower machine and processes the data. MCU served as lower machine instantaneously measures water level. Wireless communication modules were applied to transmit data. Experiment was conducted in Jianshanjiang agricultural department. The results show: quantity of testing site in network up to 65536, max error 0.49%, collecting time 5～10s, power consumption 2.4W, and idle mode consumption 72mW. This system has the characters of lower consumption and cost, high dependability, convenient network management.
Design of a Digital Controller for the Pneumatic Actuator
Authors: Lin Fan , Gong Zhi Wen
Published: December 2012

This paper analyzes the composition and principle of the pneumatic actuator system, establishes the model and deduces the transfer function of the system, and gets the simulation result through the model and the transfer function. It designs the digital controller which meets performance requirements, then calibrates the ADC, and develops the control program based on the GPIO mode of the TMS320F2812, which produces 8 channels differential PWM signals. It turned out that the simulation results agree with the experimental results, and both reach the expected performance, realizing the design of the digital controller for the pneumatic actuator.
Research on the Mechanism of Multi-Source Piezoelectric Vibratory Feeder
Authors: Wang Yang , Wu Wen Fu , Shi Su Ping
Published: December 2012

Vibration feeder is the device of subsequent orientation feeding using vibration for the granular or power materials. This device could be used in food, medicine, chemistry and so on. We announce the phenomenon of materials handling based on testing and analyzing the granular materials in the multi-source piezoelectric vibratory feeder. The results show that the vibratory spreads is the traveling wave in this device, when the device is operated. The elastic particle is the elliptic movement at the end of the stuff box. The dynamic of material movement mainly come from the traveling wave caused by particle elliptical movement, the destruction to the grain’s natural balance status caused by the vibration and the geometric position-limit guiding structure of the device and so on.
CNC System Based on FPGA for Line Contact Machining
Authors: Wang Kun Qi , Yang Jing Wei , Li Chuan Chang
Published: December 2012

A novel CNC system for line contact machining is put forward to mill ruled surface efficiently. The motion control card based on FPGA is designed in the system for line contact machining. To meet the complex interpolation requirements of CNC system, NC embedded PC structure is used to improve the performance of the CNC system. Computer input and output program by C + + Builder are operated in DLL with WinIO component, to realize the communication between PC and movement control card. Three interpolation modules are simulated in Quartus II. Simulation result shows that linear interpolation, circular interpolation and complex interpolation function are realized on the motion control card based on FPGA, and the line contact machining can be realized in the CNC system efficiently.
Optimization of Casing Wall Structure of Electrostatic Precipitator - A Case Study
Authors: Yu Yong Fu , Wang Deng Feng
Published: December 2012

The conventional structural design of wallboard of electrostatic precipitator casing uses the wall structure of stiffened flat sheet which consumes a great amount of steel. Consequently, a new structural idea was explored to optimize the conventional design which applied profiled steel sheet and located wall beam and wall column. The codes were written which designed and analyzed the wall structure of casing. On the basis of a practical project, as the design parameters were varying, the codes were used to automatically compute the strength, stability, stiffness and steel consumption of profiled steel sheet, wall beam and wall column of the corresponding design case. Then, the design with the minimum steel consumption was selected as the optimum one among all the cases which could satisfy the design requirements. The characteristics of the optimum section shape were generalized. The influence of structure layout on the minimum total steel consumption of casing wall structure was investigated. The total steel consumption of casing wall structure is comparatively small when wall column and wall beam divide the whole wallboard into several smaller blocks whose aspect ratio is about 1.6-2.9. Compared with the original wall structure of stiffened steel sheet, the optimized wall structure composed of profiled sheet, wall column and wall beam can save steel significantly which can be applied widely in large-scale electrostatic precipitator casing structures.
Development of Detection Platform for Grid-Connected Photovoltaic Inverters
Authors: Li Tao Yong , Yan Hua Guang , Xue Jin Hui , Du Jin Ping
Published: December 2012

To ensure both performance and security of grid-connected photovoltaic inverters(PVI), a detection platform for grid-connected PVI is researched. The testing method and procedures of grid-connected PVI are analyzed and the development course of this detection platform is described in detail. The detection platform consists of control computer, data acquisition system, RS 485 and GPIB system. In this platform, the solar-cell panel is simulated by programmable DC source, the power grid characteristics of power grid by programmable DC source and the load characteristic by programmable controlled RLC load. The whole detection system is controlled by LabVIEW software interface. The proposed detection platform can be used in the testing of electric performance, protection function, EMC and so on. Practical application shows that the configuration of this detection platform is rational and reliable，and its detection results are accurate.
The Analysis of 4WD Vehicle Overtaking Based on Electric Wheels
Authors: Zhu Xi , Song Jian Guo
Published: December 2012

In order to improve vehicle overtaking performance, the four-wheel driving technology based on electric wheels is analyzed. A four-wheel driving vehicle model has been built with ADAMS software, and the control strategy has been built with Simulink software. The driver steering and speed control model with variable ratio is built. The comparative overtaking simulation of four-wheel driving with and without Direct Yaw Control is processed. With the simulation, it can be found that the centroid yaw-rate of the vehicle with Direct Yaw Control is smaller, and vehicle movement track is closer to target track than the vehicle without DYC. The manipulation performance of vehicle is improved, and the labor intensity of the driver is reduced. This provides a certain amount of theoretical research for the four-wheel driving technology based on electric wheels.
City Fire Forecasts and Analysis Based on Nonlinear Auto-Regressive Time-Series Model
Authors: Liu Sheng Peng , Zhang Ye
Published: December 2012

The forecasting to future developments of the city fire time series is a challenging task that has been addressed by many researchers due to the importance. In this paper, a Nonlinear Auto-Regressive (NAR) prediction model is applied to forecast the city fire data based on support vector regression. The performances of the NAR prediction model in city fire forecasting are compared with the BP neural network method. The experimental results show that the proposed model performs best.
A Real-Time Transient Model of CF6 Turbofan Engine
Authors: Yao Hua Ting , Wang Xi , Kong Xiang Xing
Published: December 2012

In traditional aeroengine modeling, the nonlinear equations of engine model are generally solved through iterative algorithm. However, due to the strong nonlinear characteristics of the equations, the iterative model often fails to converge at some points of the full envelope and has a poor real time performance. In order to solve the problems, this paper proposes a non-iterative modeling method based on volume effect. In this method, several variables and differential equations of volume dynamics in aeroengine are introduced to the nonlinear equations, as a result, the whole set of equations becomes closed-form and can be solved without iteration. The non-iterative model of a gas turbine engine is written in matlab code. Furthermore, an open-loop simulation is carried out in matlab/simulink, both under groud and altitude condition. Meanwhile, the non-iterative model is verified by GSP11. The results illustrate that the non-iterative model provides good performance both in the stability and accuracy of solutions.
Weighted Association Rules Mining Algorithm Research
Authors: Tan Jun
Published: December 2012

Aiming at the problem that most of weighted association rules mining algorithms have not the anti-monotonicity, this paper presents a weighted support-confidence framework which supports anti-monotonicity. On this basis, weighted boolean association rules mining algorithm and weighted fuzzy association rules mining algorithm are presented, which use pruning strategy of Apriori algorithm so that improve the efficiency of frequent itemsets generated. Experimental results show that both algorithms have good performance.
Human Ear Recognition Based on Phase Congruency and Kernel Discriminant Analysis
Authors: Lei Song Ze , Zhu Qiang
Published: December 2012

To solve the multi-pose ear recognition problem under the different illumination condition, a novel method which combines phase congruency with kernel discriminant analysis (KDA) is proposed. The phase congruency of ear image is first calculated using Log-Gabor filter with 5 scales and 8 orientations, and then the phase congruency of different orientation is constructed as high dimensional vector including ample information. The high dimensional vector is mapped to kernel space to acquire discriminant feature. Experimental results show that the proposed method obtains higher recognition rate compared with the other related methods. The method of the phase congruency can eliminate the influence of illumination and phase congruency with KDA is effective to multi-pose ear recognition.
Study on Path Based Hierarchy Aggregation in DS-TE Environment
Authors: Zeng Yun Bing , Chen You Jun , He Hong Ying
Published: December 2012

Discussed the feasibility and implementation methods of path based hierarchy aggregation in the DS-TE environment, established the mathematical model for the path based hierarchy aggregation by using analog circuit switching method. The results of experiments show that the path based hierarchy aggregation method can normally effectively improve the delay performance and the extensibility of the network systems.
Access Control System Based on Speech Recognition
Authors: Wei Zheng Xi , Liang Jin Ming
Published: December 2012

In this paper, an embedded design method is presented for the access control system in the intelligent community, combining its characteristics of the application. Using speech recognition technology, intelligent community can control access more timely, conveniently, effectively, and save a lot of manpower. The experimental results show that the correct recognition rate of voice command is up to 92% or more. The access control system can be widely used in various kinds of intelligent buildings, with a good prospect.
A New Extension of Locality Preserving Projections for Image Feature Extraction
Authors: Huang Guo Hong
Published: December 2012

This paper proposes a novel algorithm for image feature extraction, namely, the two-directional two-dimensional locality preserving projection, ((2D)2LPP), which can find an embedding from two directions that not only preserves local information and detect the intrinsic image manifold structure, but also combines the both information between rows and those between columns simultaneously. We also combine the advantages of (2D)2LPP and LDA, and propose a new framework for feature extraction as two-stage: “(2D)2LPP+LDA.” The LDA step is performed to further reduce the dimension of feature matrix in the (2D)2LPP subspace. Experimental results on ORL face databases demonstrate the effectiveness of the proposed methods.
The Design of Fire Proof Leakage Current Circuit Protective Device Based on AVR MCU
Authors: Feng An Song , Wang Qing Hui , Ge Xiao Yu
Published: December 2012

Fire proof leakage current circuit protective device is a kind of protect devices. It monitors the leakage current of power supply. When they have some trouble, it shuts down power supply. Beginning from the design, the paper introduces the process of Fire proof leakage current circuit protective device design including software and hardware based on AVR MCU.
A System of QR Barcode Recognition Based on Mobile Phone
Authors: Yang Yan Li , Zhang Zhen Xing
Published: December 2012

In this paper, we design and implement a system of QR Barcode Recognition based on the mobile phone. This system is based on image processing, consists of image capture model, image pre-processing model and decode model. We propose a new adaptive local threshold method for non-illumination of QR image. The experiment result shows this system is very effective on iphone mobile.
The Application Research on Fuzzy Theory and Genetic Algorithm
Authors: Wu Xiao Qin
Published: December 2012

Fuzzy theory is one of the newly adduced self-adaptive strategies,which is applied to dynamically adjust the parameters of genetic algorithms for the purpose of enhancing the performance.In this paper, the financial time series analysis and forecasting as the main case study to the theory of soft computing technology framework that focuses on the fuzzy logic genetic algorithms(FGA) as a method of integration. the financial time series forecasting model based on fuzzy theory and genetic algorithms was built. the ShangZheng index cards as an example. The experimental results show that FGA perform s much better than BP neural network，not only in the precision.but also in the searching speed.The hybrid algorithm has a strong feasibility and superiority.
Algorithms for Automatic Modulation Recognition in Wireless Monitoring Applications
Authors: Ge Qian , Wang Qian , Yan Xiao , He Ling
Published: December 2012

The paper proposes an automatic modulation recognition scheme based on instantaneous features of intercepted signals. The modulation classifier can discriminate modulations such as Amplitude Modulation (AM), Double Side Band (DSB), Single Side Band (SSB), Frequency Modulation (FM), M-ary Amplitude Shift Keying (M-ASK), M-ary Frequency Shift Keying (M-FSK), M-ary Phase Shift Keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) without any prior information. The scheme is with simple structure, computationally simpler, and suitable for real-time processing. And the recognition parameters are anti-noise, and insensitive to frequency offset, phase offset and timing error. To evaluate the performance of the scheme, several experiments with signals in Additive White Gaussian Noise (AWGN) channel were carried out in the MATLAB by varying the values of both the main modulation parameters and the signal-to-noise ratios (SNRs). The results show that the approach can achieve high recognition accuracy even at low SNR.
Human Simulated Intelligent Control for Permanent Magnet Synchronous Motor
Authors: Xu Peng , Xiao Jian , Li Shan , Yang Yi
Published: December 2012

This paper proposes a new speed control scheme for a Permanent Magnet Synchronous Motor(PMSM) by means of multi-mode control method,Human Simulate Intelligent Control. Similar to hierarchical intelligent control system,the proposed controller for PMSM is composed of three sections,Task Adapter Level (TA), Self-Tuning Level (ST) and Master Controller Level (MC).Simulation results clearly show that the controller guarantees the speed tracking errors asymptotically converge to zero despite time varying reference speed and load torque disturbance variation.Numerical simulations reveal the superiority of the proposed controller to traditional PI.
Research on Intelligent Decision-Making System of Variable Spraying for Mobile Robot in Greenhouse
Authors: Gao Guo Qin , Zhou Hai Yan , Niu Xue Mei , Fang Zhi Ming
Published: December 2012

In order to improve the pesticide effective utilization rate and reduce the pesticide residues and the chemical pollution, an intelligent decision-making method for variable spraying of mobile robot based on a fuzzy neural network is proposed. The system is built by integrating the level of plant diseases and insect pests and the spraying target’s distance and area. The intelligent decision-making is achieved by self-learning and self-correcting the fuzzy rules of the fuzzy neural network. The simulation experiment results show that the intelligent decision-making method can realize real-time and quick decision. It has the greater decision accuracy than the fuzzy decision system on the samples not appearing in training and has a good fit for the uncertain work environment in greenhouse.
Simulation Design of Visual Servo Based on Homography Matrix Decomposition
Authors: Zong Xiao Ping , Li Yue Xia , Wang Pei Guang , Liu Wei Dong
Published: December 2012

A visual servo simulation model for puma560 robot based on homography matrix decomposition was designed. Utilizing the Robotics Toolbox and Machine Vision Toolbox, the simulation model of the visual servo system was built using the sub-systems in Matlab Simulink. Finally, the experimental results show the visual servo system can enable the robot to reach the desired position quickly and accurately.
Distributed Street Lighting Control System with IntelliSense
Authors: Li Feng , Yang Fan
Published: December 2012

In this paper, we proposed a novel street lighting system called Distributed Street Lighting Control System with IntelliSense (DSLCSI), and on this basis, five-end architecture, an ItelliSense extension mechanism and a cable theft detection method are described in turn. DSLCSI is presented to overcome the complex configuration, poor scalability and low reliability of cable theft detection methods in existing street lighting system. The results of field application show that DSLCSI provides convenient system scalability and maintainability, and improves the reliability of cable theft detection.
Research on the Technology of Intelligent Switch Components Device
Authors: Hou Jia Jia , Cai Yue Ming
Published: December 2012

Because of many present problems of the intelligent switch in the intelligent substation, it is necessary to study on intelligent switch components device. The hardware platform of the components device was based on high-speed low-voltage differential bus (BLVDS). By improving real-time characteristics, real-time communication was available for the substation process bus. It is also described that the solution to online condition monitoring of the components device. Research on these aspects laid a solid foundation for the intelligent switch components device.
Research and Application of Constant Motion Controlled by Two-Axle
Authors: Xu Yuan Kui , Wu Rui , Yao Sha Sha
Published: December 2012

Some devices require non-circular parts high surface quality. However, when hardening surfaces of these parts, it is important to choose specific motion control card to keep induction heating spots constant moving. Following mathematical model of constant motion, we program in the computer to control two-type movement of general induction hardening bed in order to achieve linked control of workpiece swing and induction spots linear motion. By test detection we can get relative velocity of induction heating spots unchanged basically and meet the requirements of parts’ induction hardening. This research has very important significance of solving problems of non-circular parts’ surface hardening.
Sensorless PMSM Control for Automobile Air-Condition Based on Sliding Mode Observer
Authors: Wang Hua Bin , Shi Jin Liang , Chen Guo Rong , Xue Di Jian
Published: December 2012

The paper presents a review of the sensorless position estimation algorithms which are being adopted by Automobile Air-condition. After analyzing and introducing of the sliding mode variable structure theory and the mathematic model of PMSM, the control strategy based on SMO and its math expression are presented. The simulation model in MATLAB/SIMULINK is established, in which the real rotor position and the estimated rotor position calculated by SMO under dynamic and static state are analyzed. Besides, the principle of sliding gain selection is raised. The simulation provides the theoretical foundation.
Research on Test and Simulation of New Type Steering System for Construction Machinery
Authors: Ma Li Ying , Liang Nai Xing , Cao Yuan Wen , Gui Shao Xiong
Published: December 2012

This paper briefly analyzed the steering principle and electro-hydraulic control system of four wheel steering (4WS) test platform for construction machinery, and then performed a series of tests in various steering conditions. The experimental data acquisition, processing and analysis were achieved by the testing system so that transfer function of the system has been determined. And then with MATLAB/SIMULINK software the system simulation was given out. The results show that the turning radius of 4WS decreases about 20% than that of traditional two wheel steering (2WS). What’s more, the steering stability of 4WS is greatly improved. The result of this paper has certain theoretical value and good application prospect.
Roll Stability Model of Lateral Load Transfer of Passenger Vehicle
Authors: Men Yu Zhuo , Yu Hai Bo , Li Xian Sheng
Published: December 2012

In order to research the influence of lateral load transfer on the roll stability of passenger vehicle, the dynamics simulation model is established. Pass through simulation, the influence of the passenger vehicle structural parameters and speed on its roll stability is analyzed. The research result shows that, the passenger vehicle rear wheel drive axle is risky for roll stability; it will first lift off when the speed is too high or the front wheel angle is too big. The roll stability of passenger vehicle can be effectively improved by increasing the wheel spread and wheelbase, lowering sprung mass center height, and improving the passenger vehicle suspension roll stiffness.
The Emergency Medical Service Facilities Location and Scheduling in the Earthquake Disaster
Authors: Li Zhen Xiang , Zhao Hai Feng , Huang Guan Wei
Published: December 2012

Contraposed to emergency medical service facilities location and scheduling problems in the earthquake disaster, we consider the seriously shortage of medical service supply capacity in the emergency rescue, propose the concept of the unit demand point of service supply index and set up a emergency rescue fairness model to minimize the difference between of unit demand point of service supply index and the ideal ratio of total supply and demand. At the same time, we build the emergency rescue timely model to minimize the distance between the each service facilities and the each covered demand point. Based on the idea of Pareto optimal, we design a advanced genetic algorithm to solve this multi-objective problem. A case study of Wen Chuan Earthquake shows that the model and algorithm are feasible and effective. This model can also provide the basis for emergency medical service facilities location decisions in the earthquake disaster.
A New Method Based on Finite Element Analysis for Crankshaft Strength
Authors: Xu Zhao Hua , Cui Zhi Qin , Wang Xiao Hua
Published: December 2012

This paper presents a new method for the analysis of the crankshaft strength by using the softwares of solidworks, matlab and ansys. Using the powerful modeling function of solidworks, the three-dimensional model of crankshaft was established. Applying the techniques of numerical operation, graph display and GUI of matlab, the simulation calculations of kinematics, dynamics of crankshaft was carried out and the force and torque of crankshaft was obtained. Making full use of finite element analysis function of ansys, the modal analysis and strength analysis of crankshaft were made. The results show that it is valid to take the respective advantages of solidworks, matlab and ansys to establish a simple and effective approach for the analysis of the crankshaft strength, which supplies foundation for the optimization design and dynamic response of crankshaft.
T-B Spline Curves with a Shape Parameter
Authors: Chen Li Juan , Li Ming Zhu
Published: December 2012

A T-B spline curves with a shape parameter λ is presented in this paper, which has simple structure and can be used to design curves. Analogous to the four B-spline curves, each curve segment is generated by five consecutive control points. For equidistant knots, the curves are C^2 continuous, but when the shape parameter λ equals to 0 , the curves are C^3 continuous. Moreover, this spline curve can be used to construct open and closed curves and can express ellipses conveniently.
Computer-Aid Cartography of Map Symbol Design
Authors: Li Juan , Wang Yang , Wang Ying , Chen Hao
Published: December 2012

Taking the natural disaster map as an example, this paper discusses the three-dimensional design supported by Computer-aid Cartography (CAC). It tries to make full use of the unique height and facade visual variables of three-dimensional symbols to express more information, and takes the shadow of three-dimensional symbols as a visual variable to apply in disaster maps. The combined application of the size and the shadow of three-dimensional symbols can maximize the utilization of the optimum visual variable and enhance the readability of the map. Through the questionnaire survey, the paper designs a series of proportional circles suitable for the popular thematic atlas format, thus achieves the automatic size customization of map symbol supported by CAC and conducive to the automation of computer aided mapping.
The High Speed Optoelectronic Isolator Design in Laser Radar
Authors: Zhang Zhen , Cheng Xue Wu
Published: December 2012

Laser radar is a kind of active modern optical equipment, It’s the extension of traditional radio or microwave radar to optical frequency. Because the probe beam wavelength shortening and directional strengthen, so that the laser radar has very strong space, time resolution and high detection sensitivity and other advantages, Laser radar has been widely applied in the atmosphere, ocean, land and in other target detection. Optoelectronic isolator is usually used in electronic circuit device, but the ns order of magnitude of the high-speed triggering and synchronization is more difficult, while the synchronization of laser radar and laser communication is in the order of ns. In order to solve this problem, this paper presents a high speed optical trigger, which can realize the high speed synchronization of emission laser and receiving circuit in laser radar, and delay time is within 150ns, that can provide protection to obtain synchronous valid data.