bluuebunny/crossref_metadata_2025 huggingface dataset:
Multi-Stages Index Tracking Optimization Model with Real-World Constraints Using PSO-DE Hybrid Algorithm
Authors: Gao Yue Lin , Yan Li Na
Published: August 2013

This paper proposes the portfolio risk of tracking error based on CVaR, and gives the multi-stages index tracking model considering some real-world constraints. We use the observed historical data and econometric methods to estimate the parameters in our model, rather than assume the returns of risk asset follow some distributions, and use filtered historical simulation method to calculate the CVaR risk of the downside tracking error. We use PSO-DE hybrid algorithm for solving our model by using Shanghai security 50 index and stocks included by the index.
A Novel Vehicle Ranging Method Based on Self-Calibration Principle
Authors: Xu Zhan Wei , Zheng Gui Lin
Published: August 2013

A novel ranging method based on self-calibration principle is proposed in the paper. This method can be used in vehicle ranging to achieve accurate distance measurement. The principle of the method, hardware architecture and experiment analysis are introduced. Self-calibration principle can eliminate the impact of the velocity of ultrasound on vehicle ranging. Plenty of experiments have been done to validate the design. Both theoretical analysis and experimental results show the effectiveness of the method. A full description of the method and implementation are presented.
Virtual Experiment Platform for Laminar Cooling Process
Authors: Pian Jin Xiang , Wang Zhen , Liu Mei Ju , Li Jie Jia
Published: August 2013

The laminar cooling process has complex features, such as nonlinear, time-varying parameters, frequent changes of working conditions, and its difficult to achieve precise modeling and the traditional closed-loop control. A multi-layer virtual experiment platform with hybrid programming of configuration is proposed in the paper. Not only does this platform keep the environment similar to the industrial field, but also saves money on purchasing the hardware system.
Research on the Delay Suspension System Based on Different Learning Rules
Authors: Song Rong Rong , Chen Zi Li
Published: August 2013

Track irregularity is one of the most important aspects of the suspension control performance impact. Due to the delay phenomenon of suspension system, the traditional PID control is unable to accurately track irregularity of track changes. Based on the qualitative analysis to delay suspension system, through modifying conventional PID controller, the article establishes four kinds of Neural Network adaptive PID Controllers based on different learning rules. The control strategy combines by the simple structure of the PID Control, the self-organizing ability of the Neural Network Control and the self-learning ability of the learning rules, adjusts PID parameters on-line, adapts to the change of track irregularity, and has strong robustness. However, the different learning rules have different learning ability of the interferences of track irregularity for the delay phenomenon of the suspension system. Simulation result shows that the supervised Delta learning rules is confirmed more effectively to realize tracking compared with other learning rules, faster response speed, more simple structure, easier operation for the track interference and load disturbance of the delay suspension system. This provides a very good way to solve the interference problem of orbit of the delay suspension system.
Band-Stop Filter Algorithm Research Based on Nano-Displacement Positioning System
Authors: Zhou Yue , Yao Xiao Xiao , Pian Jin Xiang , Su Yan Qiang
Published: August 2013

This paper proposed the algorithms of infinite impulse response (IIR) band-stop filter and all-pass filter to eliminate the inherent frequency for piezoelectric ceramics and improve the control precision for nanodisplacement positioning system. The IIR algorithm was composed of five steps (such as the determination of normalized frequency, filter orders and transfer functions of analog low-pass filter, analog band-stop filter and digital band-stop filter). Based on the experimental simulation results on the nanodisplacement positioning platform, the butterworth band-stop filter algorithm can achieve the requested filtering effects within 10 orders .
Fast Collision Detection and Deformation of Soft Tissue in Virtual Surgery
Authors: Shi Ling Ling , Yan Zhi Yuan , Du Zhi Jiang
Published: August 2013

In the virtual scene of robot assisted virtual surgery simulation system, the surgical instruments achieve complex motion following the haptic devices and the soft tissue deforms continuously under interaction forces. In order to meet the rapidity of collision detection, an algorithm based on changeable direction hull bounding volume hierarchy is proposed. Strategy of combining surface model with body model is developed for soft tissue deformation. Skeleton sphere model of soft tissue is built. Deformation can be achieved based on mass-spring theory after matching collision information with the skeleton sphere model. The experiments show that the proposed collision detection method implements faster speed compared with fixed direction hull algorithm and soft tissue deforms through combination of collision information with sphere model.
Reconfiguration of Remote Cooperative Fault Diagnosis System Based on IETM
Authors: Xu Zong Chang , Sun Han Bing , Hu Kai Kai
Published: August 2013

The viewpoint of reconfiguration of remote cooperative fault diagnosis system based on IETM was given according to the reconfigurable idea of IETM. The concept of reconfigurable remote cooperative fault diagnosis system was defined, and its connotation was analyzed. Then the realizing approach was discussed. Through bringing into grid technology, the architecture of reconfigurable remote cooperative fault diagnosis system was constructed, and finally, its running process was described.
Relay Protection Security Analysis of Jiuan Substation under Complex Power Transmission Environment
Authors: Dong Lei , Li Wei Di , Zhou Wen Ping , Pu Tian Jiao
Published: August 2013

As the voltage class and transmission capacity of power grid is increasing, the operating environment of JiuAn substation, which is one of the power supply sources of Ultra-High Voltage (UHV) transmission line, becomes more complex. A model of JiuAn substation and its complicated power supply environment is built using the power system software PSCAD/EMTDC, the parameters under typical kinds of fault are simulated, and MATLAB software is used to acquire relay protection feature from the simulation results. Based on the work above, relay protection security of JiuAn Substation under complex power transmission environment is analyzed, which will provide guidance for the substation operation.
Design and Implementation of Wind Farm’s Power Prediction Web System
Authors: Jia Yan Bo
Published: August 2013

In this paper, a web system for Wind farm power prediction is presented. By using annotation-based Spring 3 platform and technologies including FreeMarker and JFreechart, process of web design is simplified and quickly finished. In addition, the web system can be easily maintained and expanded. Finally, the establishment of wind power prediction web system is convenient for bidding of power market and maintenance of wind farms.Usually, wind farms are located in remote area and wind turbines belonging to the same wind farm are not in the same area. It is difficult for the dispatching and the management departments which are far away from wind farm to obtain data, such as power generation and the changing wind speed. So, it is necessary to build a distributional, open and real-time web system to predict power of wind farms.As the development of Internet and web technology, it is easier to apply web according to different and complex enterprises demands. And the focus of web design was to make application more convenient, more powerful and more flexible. In this paper, in order to design the forecasting web system, the lightweight container Spring3 was taken as a development platform, Spring MVC as web framework, Spring JPA as data persistence technology, Spring Security3 as Web security management. Moreover, FreeMarker was adopted as view template and JFreeChart as figure display tool. The web system provides the dispatching and the management departments with an information sharing platform which is safe, efficient, stable, extendible and easy to be maintained.
Inherent Strain Analysis of Thin-Walled Structure Welding Deformation
Authors: Lin Li Li
Published: August 2013

With the rapid development of the automotive industry and sheet metal welding structure widely used in the production practice, study sheet structure welding deformation law and method of controlling the production practice has become increasingly important significance. In this paper, inherent strain finite element method is used for analysis of thin-walled box beam welding deformation. The use of different weld residual plastic strain inherent strain in ANSYS on distributed temperature load can be used to achieve different inherent strain value loaded. Thereafter, the calculation results and the test data are compared and found that this method can improve the calculation accuracy, and therefore have a certain effectiveness.
The Video Device to Image the Side of Deep Pipe
Authors: Ma Chun Ting , Xiong Chao , Bai Xu Sheng , Du Jie
Published: August 2013

The imaging of the side of deep pipe is key problem of the detection implement in industry. With the help of tailor-made lamp-house, the side image of the deep pipe is detected by the CMOS chip. The CMOS chip is a little view field and large focal length, and it could convey the side information to the processor-SQ606. The image procession and photo and video files manipulation are fulfilled. With the telescopic barrels, the image of the side of deep pipe is satisfied.
Underwater GPS Positioning System Based on a Dual Acoustic Device
Authors: Ai Li Li , Xu Wen Hai , Liu Yan Cheng , Gu Ji Lin
Published: August 2013

In order to solve the problem that existing underwater GPS positioning technology can only realize positioning underwater target installing acoustic transponder, the underwater target positioning system having good dependability with ultra-short baseline (USBL), forward looking sonar (FLS) and GPS receiver was designed. Using the system to position presetting underwater target in the offshore area of Dalian, positioning accuracy reached 1.2m, according with theoretical derivation, and verifying the feasibility using the system to obtain the latitude and longitude of underwater target in WGS-84 coordinate system.
Comparisons between Ku-Band GaAs SSPA and GaN SSPA with a Same Architecture
Authors: Cheng Hai Feng
Published: August 2013

In this paper, two ku band SSPAs using GaAs and GaN MMICs respectively were developed. Both of all have a same 8-way combining architecture and a same packaging module. The two SSPAs were measured on a same pulse width and duty cycle with different drain voltages. Compared with the GaAs SSPA, the GaN SSPA is more compact and efficient.
Automatic Measurement and Modeling Implementation of Diode Reverse Recovery
Authors: Sun Wei , Yang Da Ke
Published: August 2013

Diode reverse recovery current dissipation is the most important source of power dissipation for diodes used in fast switching converters or other power devices applications. As the reverse recovery current can peak at very high currents, this may cause the failures of other devices in the circuit. Therefore the Diode Reverse Recovery phenomena should no longer be ignored in device model and circuit simulations employing diodes. Automatic measurement of Diode Reverse Recovery time is becoming essential for mass production industrial process monitoring and device modeling. In this paper, a novel Sagittarius automatic Diode Reverse Recovery Time Measurement System was developed. This system has enabled the automation measurement and improved the measurement speed for about 5-7 times. A new Verilog A Diode Reverse Recovery model which can reflect the actual device characteristics was developed base on the data measured using this new system.
ANFIS Model for Time Series Prediction
Authors: Jin Xue Bo , Wang Jiang Feng , Zhang Hui Yan , Cao Li Hong
Published: August 2013

This paper describes an architecture of ANFIS (adaptive network based fuzzy inference system), to the prediction of chaotic time series, where the goal is to minimize the prediction error. We consider the stock data as the time series. This paper focuses on how the stock data affect the prediction performance. In the experiments we changed the number of data as input of the ANFIS model, the type of membership functions and the desired goal error, thereby increasing the complexity of the training.
Dynamic Analysis of Rotary Drillstring in Horizontal Well Based on the Fluid-Structure Interaction
Authors: Luo Min , Xu Ting Ting , Zhao Ting Ting , Zhao Wen Xin , Liu Ju Bao
Published: August 2013

With the development of drilling technology, rotary drillstring not only produces random multi-directional collisions with the inner wall of pipe, also couples with the inner and outer annular fluids. This results in a complex system of nonlinear fluid-structure interaction. In the paper, structure and mode of operation about rotary drillstring are considered, the equations of the structure dynamics, fluid equation of continuity and momentum equation are coupled. The three-dimensional numerical model and computational method is established about the fluidstructure interaction dynamic analysis of rotary drillstring. Take the rotary drillstring and inner and outer fluids as a research object, dynamic analysis of the rotary drillstring is finished, considering the fluid-structure coupled characteristics and compare the air medium, the results show the effect of fluidstructure interaction. It can provide the feasible method for the study of the string in the oil drilling and production engineering and conduct the development of drillstring dynamics in horizontal well drilling engineering.
Outdoor Personnel Positioning System Based on GPS
Authors: Pan Hai Peng , Wang Le , Chen Dong Dong
Published: August 2013

With the comparison of wireless positioning technology such as Wi-Fi, ZigBee, GPS, this paper presents an outdoor personnel positioning system based on GPS. It is composed of electronic wristbands (used for detainees), handsets (used for supervisors) and monitoring software of the host computer. In order to improve the positioning accuracy and reduce power consumption of the system, high-precision GPS chips and low power microcontroller chips are applied. Handsets can exchange data with electronic wristbands through self-prepared communication protocol. It also can work out the distance through a precise latitude and longitude distance algorithm. Finally, the monitoring software will reproduce personnel routes in Google Earth. The system can achieve the positioning of fixed groups and moving groups, which is suitable for the detention center to supervise, escort or chase detainees.
The Mechanical Analysis of the Coiled Tubing
Authors: Liu Ju Bao , He Chun Sheng , Yue Qian Bei
Published: August 2013

With respect to the conventional coupling thread, the coiled tubing had the advantages of without screwing on and screwing off in the lifting pipe string. It was widespread used in the drilling and repairing well. According to the actual state of the coiled tubing, the mechanical models on the ground and in the wellbore were established in this article. The were able to simulate the contact state of the coiled tubing through the drum, the guide frame, the injector head and in the wellbore. The curves of the axial force that through the rollers, guide frame, injection head and wellhead was obtained with the changes of the depth.
A New Key Management Scheme for Hierarchical Wireless Sensor Network
Authors: Li Chun Yuan , Zhang Xiao Tong , Qi Yue , He Li Wen , Chen Hong Song , Zhang Xue Ying
Published: August 2013

Security is critically important for hierarchical wireless sensor networks. Due to the limited resources of the sensor nodes, the traditional key management schemes are not suitable for wireless sensor network. In this paper, a new key management scheme for hierarchical wireless sensor network is proposed, which would be effectively against cluster node capture by supporting multiple keying mechanisms. The security of network is independent on a single key. Compared with the LEAP protocol, our scheme has lower consumption and higher scalability.
An Adaptive Load Balancing Method of Adjustment Based on Cloud Computing Resources
Authors: Jiang Xiao Ping , Jiang Teng , Zhang Tao , Li Cheng Hua
Published: August 2013

By combining LVS cluster architecture and could computing technology, system architecture of the cloud computing service platform is proposed. Cloud computing technology is suitable to support large-scale applications with flash crowds by support elastic amounts of bandwidth and storage resource etc. But traditional algorithms of load balancing provided by LVS are unsuitable for the proposed service platform, because these algorithms are designed for static server resource provided by traditional cluster technology. Taking both the overall utilization rate of server resources and the active connections of the server into counter, an adaptive adjustable load balancing algorithms (Least Comprehensive Utilization and Connection Scheduling algorithm, called LUCU) is proposed in this paper. According the utilization of cloud resource and the users demand, automatic switching between Round Robin (RR) algorithm and LUCU algorithm is achieved. When the cloud capacities are not able to meet the instantaneous demands, LUCU is chosen instead of RR. The proposed platform and algorithm are verified and evaluated using large-scare simulation experiments. The test results show that the equilibrium load is nearly achieved by adopting the proposed algorithms.
Study on Cold Start Influence Factors of Three Way Catalytic Converter
Authors: Cai Hao , Yu Li Ping , Gong Jin Ke , Geng Yu He , Liu Ya Fei
Published: August 2013

This article has established a three-way catalytic converter reactor model of gas phase reactions and surface reactions. Based on this model, cold start transient emission numerical simulation has been done. The result shows that the influence of ambient temperature and exhaust temperature on the HC is much greater than the impact on the CO.
Iron Ore Grinding Energy Conservation Research Based on Neural Network
Authors: Sun Tie Qiang , Xie Cui Xue , Qiu Zhi Qi
Published: August 2013

This article briefly introduces the iron ore grinding classification process and analyzes the distribution of mining energy consumption. To realize the energy conservation of the mill by using genetic BP neural network, we make MATLAB simulation test. It shows feasibility and superiority of the control scheme, which has some meaning for energy conservation and reducing consumption of iron mine.
Integrated Support Decision of Aircraft Hydraulic System Based on Sequence Operation Theory
Authors: Cui Jian Guo , Fu Kang Yi , Qi Yi Wen , Jiang Li Ying , Liu Hai Gang
Published: August 2013

There is a great deal of uncertainty in spare parts inventory support process of aircraft hydraulic system, which cause its support decision difficult. Built integrated support decision model of the spare parts inventory based on sequence operation theory. Regard the quantity of the spare parts demand, maintenance and store as one-dimensional discrete random variable, analyzing the mutual effect among the random events utilizing addition type convolution, subtraction type convolution, and type product, thus give a dynamic description of the spare parts inventory integrated support process. Provide optimal decision basis for the spare parts inventory integrated support of aircraft hydraulic system. Results of the experimental indicated that the result of the support decision modeling consistent with the actual demand and the support decision model proved to be validated.
Multiple Factor Ambiguous Pattern Recognition Based on Secure Multi-Party Computation - An Important Future Technology in Engineering Application
Authors: Wang Xiao Mei , Yao Yi Fei , Bian Sheng Qin , Wang An
Published: August 2013

Ambiguous pattern recognition is a very important technology in the field of science including engineering application nowadays, it uses methods of fuzzy mathematics enabling the computer to recognize and judge the objective things. But, the research on ambiguous pattern recognition rarely involves the field of security, while in fact both the participant of the pattern recognition and the database need to protect their privacy. This paper mainly introduces the secure multi-party computation into the field of ambiguous pattern recognition, raises solution for the secure multi factor ambiguous pattern recognition under the half honest model, and proves the validity and security of the protocol.
ID-Based Multi-Signature Scheme in Electronic Communication
Authors: Niu Qiu Na
Published: August 2013

An efficient identity-based (or ID-based) multi-signature (IBMS) scheme from RSA is proposed based on a variation of the Fiat-Shamir signature scheme. The proposed scheme with fixed signature length has a much more efficient signing procedure. Each user can sign a different message; subsequently a set of signatures can be turned into a multi-signature via an aggregation process which may be executed by any entity. Also the multi-signature verification time of modulo exponentiations required is the same as that of a single signature. And the proposed scheme can be proved to be secure against attacks from the adaptive given identity attack, chosen message attack and multi-signer collusion attack.
Effect of Growth Temperature on Thin Films Structure and Blue Photoluminescence Spectrum of Nanocrystalline ZnO Films
Authors: Song Guo Li , Liang Hong
Published: August 2013

Nanocrystalline ZnO films were deposited on Quartz substrates by RFMS. A strong blue emission (430 ~ 460nm) and UV emission were observed. PL of the integrated intensity and peak intensity, XRD peak intensity and half width (FWHM) and their relationship with growth temperature are given. It was found that 300 °C ~ 350 °C temperature is favorable to the growth of thin film growth, and can get a strong blue emission spectrum. It was initially confirmed that the blue emission (430 ~ 460nm) of ZnO thin films is from the shallow donor electrons to the valence band on the top of the transition which is formed by the Vo or Zni, or Vo to the formation of shallow donor level of Vzn the formation of shallow acceptor level of the composite.
The Stress Analysis of Joint Connecting Bolt of Submersible Electric Pump
Authors: Ding Yu Qi , Liu Ju Bao , Tao Liang Quan , Wang Yun Cong
Published: August 2013

Submersible electric pump units are connected by bolts. This paper uses finite element analysis method to simulate how the pump joint bolt behave when it transmit torque.In this paper, temperature method is adopted to simulate the bolt preload and axial deformation.It also used to analyse and calculate the limited value when submersible electric pump units transmit torque under different preload. All of this provide the designing of connecting bolt preload and construction with theoretical basis.
Research for Rectangular Beam of Dual-E Elastic Body of Six-Axis Force Sensor Based on Limit Memory Extended Kalman Filter
Authors: Zhu Wen Chao , Xu De Zhang
Published: August 2013

The series approximation in the EKF algorithm can lead to low estimated accuracy and poor robustness. To this end, the paper proposes Limit Memory Extended Kalman Filter (LEKF) algorithm which is based on the nonlinear Limited Memory Filter (LMF).Next the paper develops the model of nonlinear state-measurement for rectangular beam of dual-E elastic body of six-axis force sensor by the relationship between strain and deflection. Moreover, The EKF algorithm which is combined with the LMF algorithm can only use the first N-1 measurements that are nearest the current time to compute the optimal estimation. Finally, the effect of old measurements can be reduced substantially. Comparing with the LMF and the EKF in terms of filtering effect by simulation experiments, it is shown that the LEKF algorithm provides higher estimated accuracy and better rubustness to eliminate the noise signal.
Numerical Simulation and Analysis for Influence of Wall Effect on Cavity Shape
Authors: Li Fu Yuan , Zhang Yu Wen , Du Xi Zhao
Published: August 2013

In the experiment of cavitation, the same water tunnel with different model size will get cavity shape that is different from the result of the empirical formula under the same cavitation number. In this article, we studied the impact of wall effect on natural cavity shape and the resistance of cavitator. We get the cavity shape and resistance of cavitator under different diameter ratio. We also get the law how cavity shape and resistance of cavitator change with the diameter ratio. The results provide a reference for experiment in water tunnel and the simulation model.
Design of Distribution Bench for Precision Measurement of Micro-Irrigation Sprinkler Irrigation Uniformity Coefficient
Authors: Lou Wei , Hou Jia Lin
Published: August 2013

Micro-irrigation sprinkler irrigation uniformity coefficient is an important indicator of measuring the irrigation uniformity of micro-irrigation system and is an important parameter of micro-irrigation nozzle design. In order to test micro-irrigation sprinklers irrigation uniformity coefficient precisely, micro-irrigation sprinkler irrigation uniformity coefficient precision test-bed was developed. Test-bed can measure some parameters, such as on-site temperature, pressure, total flow, sub-flow and measurement time accurately. Collecting data through the data collect network. Multi-chip acquisition card is connected with RS485 bus and is connected to the host computer by numerical control system specially developed. The task of numerical control system is to process preliminary collected data, transfer the data to host computer, and coordinate with host computer to complete the task of control. It can also complete the several of control functions independently. Experiments show that the test-bed is reasonable designed, easy to operate and has a high test accuracy.
Research on Monitoring System for Transfusion in Hospital
Authors: Wang Hai Qun , Xu Mei
Published: August 2013

In order to solve the existing problems of artificial monitoring transfusion treatment and enhance the automation level of the hospital care and management, a hospital infusion monitoring system is designed. Hospital infusion monitoring system adopts the structure of distributed computer control system, adopts RS485 bus to realize the communication between the upper computer and the lower computer. The lower computer uses MSP430F149 MCU as the core, implements the dripping speed detection, the drug liquid remaining amount detection, at the same time to adjust dripping speed by controlling the stepper motor. PC microcomputer as the monitoring center, accepts data that transmits from the lower computer, and displays, storages, analysises and statistics, at the same time controls the lower computer.
Simulation for Range Prediction of Active Sonar in Shallow Water
Authors: Zhang Liang , Meng Chun Xia , Na Jian
Published: August 2013

In shallow water the acoustic wave from ambient noise sources carries a large number of environment information based on the complicated reflection both on the surface and seabed interface. The sound speed profile is one of the influencing factors of sound propagation characteristic, while for a long distance the sound absorption coefficient of water medium has an important significance to propagation range. The simulation results show that in shallow water sound absorption of seabed, sound speed profile and sound absorption of water were taken into account, then range prediction of active sonar can be exactly obtained using normal-mode propagation.
The Innovative Design of Measuring and Metrological Instruments Using Dimensional-Analysis
Authors: Ma Li Hui , Gao Yong Yang , Sun Hui , Hou Xiao Hua , Qi Ming Jun , Li Guo Hui
Published: August 2013

Conceptual design is the core of product innovation. During the conceptual design of measuring and metrological instruments, build common physical parameter dimension of it by the Classifying physical quantities. By using the method of design and genetic evolution, build product innovation design model and find ideal project in the multi-domain knowledge space. Finally, find the useful design chain of product to support the computer-assisted innovative design.
Algorithm of Change Points Detection for a Trip Coil
Authors: Zheng Yu Huang
Published: August 2013

A predictive maintenance approach of vacuum circuit breaker is based on the circuit breaker coil current signal. The method identifies the critical time instants in the close coil current, to be used for diagnostic analysis. Change points detection based automatic signal segmentation plays a significant role in recognition-oriented signal processing. In this paper, we addressed the algorithm of change points detection for applications in fault detection for a trip coil. The algorithm includes three parts which are data smoothing, extrema search and K-Means clustering. The experimental results show that this algorithm is effective.
Application of EKF for an Electro-Hydraulic Servo System Using Model-Based Approach
Authors: Zheng Lin , Wu Liang Liang , Gu Xue Ming , Shi Z. , Ball Andrew
Published: August 2013

This paper works on extended Kalman filter (EKF) for model-based fault detection of an electro-hydraulic system to deal with stochastic behaviour during control. A mathematical model of an electro-hydraulic system is developed. Some faults are introduced to evaluate the EKF fault detection method. Comparison of the EKF estimation accuracy and a linearised model-based accuracy shows the advantage of the EKF.
Variable Number of Multi-Sensor Fusion for Indoor RFID Tracking System
Authors: Jin Xue Bo , Wang Jiang Feng , Zhang Hui Yan , Cao Li Hong
Published: August 2013

We present a new method to accurately tracking persons indoors by active RFID technology. To deal with nonlinear measurement model, the EKF(extended Kalman filter) is used to estimate the target trajectory. This paper developed the fusion estimation algorithm for the common indoor tracking problem with the reader at any location and fusion estimation with variable number of multi-sensor system. Simulations show the algorithm developed here can adaptively adjust the model parameter while tracking and obtain good estimation performance for indoor RFID tracking.
Studies on the Algorithm for Five-Axis NC Machining with Triangular Facet Model
Authors: Geng Ren Xian , Qi Hou Jun , Pan Xin , Liu Zhi Gang
Published: August 2013

Using five-axis equipment for NC machining of free-form surface is an effective way to improve machining quality and machining efficiency, the surface shape and the five coordinate of the complexity of the machine tool movement led to its tool path planning technology is difficult. The paper aimed at the five coordinate NC machining of free-form surface and puts forward a five-axis NC machining method based on triangular facet model. The research based on triangular facet model, using constant scallop height method to calculate the step distance and improve the cutting efficiency to a great extent. In the process, tool path is generated, combining with the method of configuration space interference free.
Large-Tonnage Double Rotary Railway Crane Rotating Platform Finite Element Analysis and Optimization Design
Authors: Di Yang , Zhang Zhong Peng , Shen Shi Lin , Wen Bao Le
Published: August 2013

Rotating platform is one of the railway cranes key components, for the installation of crane jib, lifting mechanism, luffing mechanism and rotating mechanism. In order to guarantee the normal operation of the crane, the rotating platform should have enough stiffness and strength. Based on the finite element analysis software WORKBENCH, this paper takes a kind of 160t double rotary rescue railway crane as the research background, and completed the parametric modeling and structure analysis of the rotating platform including the flexible counterweight for the first time. Thus avoiding the errors brought by the equivalent weight before. And on this basis, through the finite element analysis software ANSYS, the thickness of various parts of the rotating platform was optimized. As a result, the weight of the rotary table has a significant reduction. This will provide a new method for the design of railway crane in the future.
Vehicle Network System CAN Protocol Based on the Anti-Jamming Methods Research
Authors: Zhang Bin , Zhang Shang Wei
Published: August 2013

This document explains the CAN-bus protocol working principle and main content of vehicular networks (CAN) interference factors. Vehicular CAN network communication method has been widely accepted by the global auto makers. The CAN protocol abolishes traditional addresses coding, and instead to communication data block coding. The method can make the different nodes at the same time to receive the same data. How to prevent the interference of CAN become a new subject of practical. This paper discusses the vehicular CAN-bus to prevent interference pattern from two aspects of hardware, software.
Control of Pulse Fatigue Test Press of Oil Cooler Based on Repetitive Control
Authors: Zhu Hua
Published: August 2013

A repetitive control system was designed to achieve above requests, the simulation model was created in Matlab to check out its work. .then repetitive control system was also built up in Matlab, and then some simulation experiments were done to check the functions of the controller. Some experiences in design and analysis of repetitive were summarized, which can be referred by other applications.
Research of Robust Fault-Tolerant Control for T-S Fuzzy Time-Delays Descriptor System
Authors: Zhao Chun Lei , Xu Yi Nan , Zhu Dong Bi , Xu Cheng Zhe
Published: August 2013

In order to describe the time-delays and faults on continuous nonlinear descriptor system using T-S fuzzy model, an observer is proposed to estimate system states, actuator and sensor faults. A fuzzy state feedback controller is constructed for faults compensations. On the basic of Lyapunov stability theory, the proposed robust fault-tolerant control method ensures the closed-loop system to be robust stability even as faults occur. The actuator and sensor faults can be diagnosed and estimated in 0.2 seconds. The performance of the proposed design method is effective in simulations.
Port-Controlled Hamiltonian Control of IM Based on Back-to-Back Converter
Authors: Zhu Ning , Yu Hai Sheng , Shan Bing Qiang
Published: August 2013

A method of port-controlled Hamiltonian (PCH) systems energy-shaping control is presented for the four-quadrant control problem of squirrel cage induction motor (IM) drive system. First, the PCH models of IM drive system are developed. Then, the PCH controllers are designed based on the control theory of closed-loop state error PCH system. The coordinated control of the grid-side and the motor-side are applied in Matlab/simulink, which the motor-side is started after the grid-side is achieved up to stable. The controlled system can be achieved that DC bus voltage controllable, unity power factor, energy bidirectional flow, IM run in the four-quadrant, etc.
Research on Vibration Model of Special Vehicle Based on Dual-Mass System
Authors: Shao Ya Jun , Gao Qin He , Cheng Hong Jie
Published: August 2013

Taking a special vehicle vibration system as the research object, according to the actual structure of the chassis, the spring damping and stiffness of the nonlinear characteristics and the tire vertical elastic accounted, a nonlinear vibration model of special vehicle based on dual-mass-system is set up. The tire radial stiffness value is analyzed in Ansys, a simulation is performed by leading the mathematical model of suspension system into Adams, a characteristic curve of stiffness and damping of suspension system is obtained.
The Generation of the Fuzzy Control Rules Based on Association Rules with Temporal Constraints
Authors: Li Zhi Gang , Yang Feng Li
Published: August 2013

In the field of fuzzy control, the generation of fuzzy control rules has always been a problem, because the industrial data is generally expressed in the order of time ,so it strongly depends on the time, it does not take the factors of temporal constraints into account in the previous extracting rule process.This paper uses temporal constraint association rule ,and uses the data mining methods to generate temporal fuzzy control rules. The method is verified by using the MATLAB7.1 ,the simulation shows that the method can achieve good fuzzy control rules.
The Control System of Test Bench for Thermal Insulating Properties of Building Doors and Windows Based on Fuzzy-PID Control
Authors: Gong Zhi Guang , Du Chun Hui , Li Ya Jie , Yu Jiang Li
Published: August 2013

According to many temperature measuring points, the large delay, nonlinear and time-varying characteristics of the temperature control system of test bench for thermal insulating property, By combining fuzzy-PID control technology with Zigbee WSN technology, a design scheme of the automatic control system of test bench for thermal insulating properties of building doors and windows is put forward, which is low-cost and high precision. The microprocessor of sensor node adopts CC2530 wireless MCU. The system adopts Zigbee wireless network and RS-485 bus to transmit digital temperature and humidity signals, and is no wiring, intermediate links are lessened, transmission error is reduced and temperature measuring accuracy is improved. By adopting Fuzzy-PID control, the self-adaptability of controller and the precision of temperature control is improved.
Design of Soil Temperature and Humidity Remote Monitoring System of Tea Garden Based on GPRS
Authors: Wang Zhan Bei
Published: August 2013

This document analyze the important impact of soil temperature and humidity on the tea trees growth, and design a kind of remote monitoring system of soil temperature and humidity of tea garden based on GPRS. In this system AT89C2051 is used as controller, and it control SHT11 timing collect soil temperature and humidity information, and using AT commands control the GPRS module to access internet, establish TCP connection between the detection terminal and the data center, then remote transmit collection data to monitoring center, store and manage data by database. The application results proved that the solution is feasibility.
Simulation and Experimental Verification of Typical Aircraft Panel Structure Using Piezoelectric Effect for Vibration and Noise Reduction
Authors: Zhang Li , Sun Xia Sheng , Li Kai Xiang
Published: August 2013

A method for the vibration and noise reduction of a typical aircraft panel structure under noise excitations is studied. The noise excitations are caused by travelling wave test device, and the experimental is performed by the piezoelectric switching shunt circuit based on the piezoelectric effect.
Numerical Simulation of Compressive Experiment of Coal Seam in Deep Underground for Geological Storage of Carbon Dioxide
Authors: Han Feng Shan , Wu Xin Li
Published: August 2013

The geological storage of has been recognized as an important strategy to reduce emission in the atmosphere. Coal seam has strong absorption capacity for , hence the coal seam can be used as geological storage reservoirs, simple and easy to use modeling tools would be valuable in assessing the performance of deep underground geological storage. In this paper failure process of coal seam in deep underground under triaxial compressive experiment is presented by numerical simulation. That is of significance and valuable to those subjects of investigation of strength of coal seam in deep underground and mechanism of propagation and coalescence and evolvement of crack for coal seam in deep underground, it is shown by numerical simulation that failure shape of coal seam in deep underground under triaxial compressive experiment of lateral pressure of 25Mpa is typically shear failure, and characteristic of deformation is obviously elastic-brittle, which is significance to understand the performance of the coal seam in deep underground
Common Problem Analysis in Electromechanical Equipments of Highway External Field
Authors: Liu Yu Xin , Jia Xu
Published: August 2013

Electromechanical system is the main auxiliary system for expressway traffic facilities and the main tool to implement modern management. In this paper electrical safety performance and environmental adaptation performance were introduced first. Then highway external field electromechanical equipments were recommended. This may give some references to electrical and mechanical equipment design, production and construction.
Pool Boiling of Nanofluids in Vertical Porous Media
Authors: Irwansyah Ridho , Putra Nandy
Published: August 2013

The development of electronic components such as microprocessor requires a better thermal management system to overcome the high heat flux produce by the component. The method to absorb the heat produce by the microprocessor is still use the conduction or either natural or free convection which still in a single phase heat transfer. One of heat transfer method that suitable for a high heat flux application is pool boiling which has a two order of magnitude higher than of a single phase heat transfer and does not require a pump to move the fluid. In this study has been conducted the pool boiling experiment with four different porous media surface which are sintered copper 300 µm and 400 µm, copper screen mesh and stainless steel screen mesh with four different fluid which are Al2O3-Water 1%, 3% and 5%. The sintered copper 400 µm has shown a better heat transfer performance compared to the other porous media. The Water, Al2O3-Water 5% has shown a performance no better than Al2O3-Water 1% and 3%.
Effects of CO2 Dilution on the Premixed Combustion of CH4 in Microcombustor
Authors: Bagheri Ghobad , Hamidi Ehsan , Wahid Mazlan A. , Saat Aminuddin , Sies Mohsin M.
Published: August 2013

A numerical study on premixed combustion of CH4+ CO2+ Air in two dimensional is done. Parameters of inlet velocity and temperature of fuel and combustor geometry and size are considers the same but the CO2dilution rate changes. Results of this simulation shows that while the CO2dilution rate increases, flame temperature and velocity decrease. There is a limitation for increasing of CO2in the mixture. If amount of CO2in the mixture goes beyond the 47.7%, the fuel will lose its ability to be ignited and thus there will be no flame in the combustor. In addition, knowing the maximum temperature of flame may help to analyze the combustion process and choose suitable material in manufacturing the micro combustor.
Feasibility Study of Pulse Detonation Engine Fueled by Biogas
Authors: Dairobi Ahmed G. , Wahid Mazlan  A. , Inuwa I.M.
Published: August 2013

The hottest issue toward the environment today is the Clean Development Mechanism (CDM) and Green House Gases (GHG) which influenced climate change. At the same time, the world is facing the crisis of limited reserves of petroleum-based fuel resource which is being continuously depleted. Therefore, these three issues can possibly be overcome by using alternative fuels such as biogas, biodiesel, biomass, biofuel, alcohol, vegetable oils etc. The use of biogas as fuel for Pulse Detonation Engine (PDE) possibly promise great advantages on power production with less emission. This is because PDE operates with higher thermodynamic efficiency by operating on constant volume pressure. Biogas usage will somewhat contributed to the CDM and and lessen the GHG issues. Here through detailed literature review, the challenges such as lower flame speed (compared to hydrocarbon fuel) and biogas impurities are discussed. Combustion characteristics of biogas in detonation mode are also investigated. Strategy is presented here for looking at the possibility of PDE operation using biogas.
Research on the Direct Evaporative Cooling Air Conditioner
Authors: Zhang Jian
Published: August 2013

t focuses on the test and analysis of running conditions for the air conditioner and the functional segments at all levels in this paper, backed by the direct evaporative cooling air conditioning units experiment table. Analyze the influence of inlet air dry ball temperature and relative humidity to air conditioner cooling capacity and cooling efficiency, which has certain guiding significance to improve the direct evaporative cooling air conditioner performance.
The Curved Plate Flaw's Location and Direction Detecting Based on the Transducer Array
Authors: Li Xi Peng , Xu Chun Guang , Liu Zhao , Xu Han Hui
Published: August 2013

The curved structural plate components have been widely used in petroleum, natural gas, chemical industry, and other industries fields, monitoring and detecting the curved structural plate components flaw has a great significance for improving the components integrity, reliability and lifespan in service. Based on the elastic wave fundamental theory, elastic wave equations, and phase velocity dispersion characteristic curves in curved plate component, the article gives the phase velocity practical detecting method. By using thecomsolfinite element software, the author proposed a wave propagating forward modeling analytical method, which gives a guidance to study the relationship between the wave and the flaw. By adopting the ellipse algorithm, the article proposed a positioning and imaging method which was used to locate the flaws position and distinguish the flaws direction. Based on the theoretical and technical analysis above, a number of experiments has been done, and the results shows that the detecting and imaging method can locate and image the flaws position and its geometrical morphology precisely for the curved plates flaw detecting.
Research on the Performance of 3-State Power Amplifiers for Magnetic Bearings
Authors: Li Zhi Li , Zhang Kai , Dai Xing Jian
Published: August 2013

The performance of the power amplifier is closely related to their hardware components and current control modes. The work was focused on comparison of the experimental results based on different current sensors and the application of two different current control modes for 3-state amplifiers. When the same control mode was used, three kind of current sensors were tested and the corresponding amplifier current ripples were measured. Experimental results shown that when using a faster current sensor, the amplifier achieved smaller current ripples. Then a 3-state PWM current control mode and a Sample-Hold current control mode were compared based on the power amplifier circuit with the same hardware components. The performance difference in the experiments were studied and explained. The 3-state PWM power amplifier could achieve a better performance in actual use.
Computational Investigation of Mechanical Behaviour of FSW Joints
Authors: He Xiao Cong
Published: August 2013

Friction stir welding (FSW) is a rapidly emerging joining technology due to significant advancements in tooling and process development. Latest literature relating to finite element analysis (FEA) of mechanical behaviour of FSW joints is reviewed in this paper. The recent development in FEA of mechanical behaviour of FSW joints is described with particular reference to two major factors that influence the performance of FSW joints: static behaviour and fatigue behaviour. The main FE methods used in FSW performance are discussed and illustrated with brief case studies from the literature.