bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimal Control of Distributed Generation System: The State of the Art
Authors: Liu Hai , Du Qing Fu , Song Yong , Guo Wei
Published: October 2013

This paper presents a detailed review of the existing methods of the optimal control of distributed generation system and the state of the art of current research. The research of the optimal control of distributed generation system is summarized in terms optimal dispatch and control strategy. The approach of modeling and analysis for distributed generation system is described in detail. The key difficulties of the theory and technique about the optimal control of distributed generation system are analyzed. The current issues about the optimal control of the system are pointed out at last, and the research orientations of the optimal control of distributed generation system are presented.
Sports Analysis and Program Design of Biped Robot Based on Arduino
Authors: Liu Jie , Wu Tao
Published: October 2013

Based on the profiling principle, assemble bracket and servos into a six-degree-of-freedom biped robot. The robot use Arduino control panel as the motion controller. By analyzing the walking process and developing the sports programs, the overall motion analysis and design corresponding control program is made. So that the robot can be completed by a given program specified straight action.
Sliding Mode Control for Magneto-Rheological Vehicle Suspension Accounting for its Nonlinearity
Authors: Zhang Yu Lin
Published: October 2013

The non-linear characteristics of magneto-rheological (MR) suspension systems have limited control performance of modern control theory based on linear feedback control. In this paper, a four DOF half car suspension model with two nonlinear MR dampers is adopted. In order to account for the nonlinearity, a sliding mode controller, which has inherent robustness against system nonlinearity, is formulated to improve comfort and road holding of the car under industrial specifications and it is fit to semi-active suspensions. The numerical result shows that the semi-active suspension using the sliding mode controller can achieve better ride comfort than the passive and also improve stability.
Fast Terminal Sliding Mode Control for the Ship Steering Problem
Authors: Vweza Alick O. , Lee Deok Jin , Hong Dong Pyo , Chong Kil To
Published: October 2013

In this paper we propose the application of a robust terminal sliding mode control with fast sliding surface to the ship control problem, which consists of leading the ship along the desired course via automatic changes in the rudder blade deflections. In spite of its robustness to system parameter variations and external disturbances, normal terminal sliding mode control (NTSMC) has a limitation of shattering the input rudder angle command particularly when the ship steering mechanism has a big time constant. Through comparative simulations, we show that the proposed controller with fast sliding surface outperforms NTSMC controller in reducing the chattering in the input signal and the initial swing of the rudder angle in the presence of external disturbances and model uncertainties.
New Theorem for Asymptotically Stability for Time-Delayed Systems Based on LMI
Authors: Song Chang Hui
Published: October 2013

This paper stadies the problem of the asymptotical stability for a time-delayed systems. By using LMI method, a new approach is used to derive a delay-dependent sufficient condition, which can guarantee that the time-delayed systems with multiple time delays is asymptotical stable. At last, a numberical example is given to show that the new theorem is more effective than the present methods.
One Improved Generalized Predictive Motion Controller Based on Slipping Constrains for the Six-Wheeled Rocker Mars Rover
Authors: Huang Yan Wen , Cao Qi Xin , Leng Chun Tao
Published: October 2013

Mars Rover works in a complicated environment with uneven terrain. In order to improve the robot’s dynamic motion ability, traversability and stability, in this paper, an improved generalized predictive motion controller was denoted based on the analysis of the robot’s kinematic model and slipping constrains. The experiments demonstrate the feasibility of the control algorithm for the six-wheeled rocker Mars rover.
Reentry Landing Boundary Prediction
Authors: Li Da Wei , Jiang Rui Kai , Liu Bo
Published: October 2013

This paper presents a method of computing the boundary of the landing location of vehicle on reentry mission. By transforming the inequality constraints into the boundary in energy-drag space, the drag profile can be scheduled with respect to the normalized energy between the upper and lower bound which leads to the near edge and far edge of the landing zone. The magnitude of the bank angle can be derived from the drag profile, while the cross-range can be adjusted by modifying the sign of bank angle. With the derived magnitude and sign of bank angle, thestate equation can be solved to generate the landing zone.
New Approach to Non-Fragile Control of Uncertain Fuzzy Systems with Time-Delay
Authors: Li Li
Published: October 2013

This paper focuses on the delay-dependent stability analysis and stabilization for T-S fuzzy system systems with state and input delays. Some new and less conservative delay-dependent small stability conditions are explicitly obtained. The upper bounds of time-delays are obtained by using small convex optimization.Finally, a numerical example is included to show the effectiveness.
A Design of Current Loop for Motors Control System Based on SVPWM
Authors: Han Quan Li , Wang Xi
Published: October 2013

This paper introduces the SVPWM mechanism firstly and the software and hardware scheme of current loop in servo motor is designed; it also contains the control strategy and the current sampling principle. The dead time compensation problem in the inverter of the motor drive is discussed deeply. In the end, the software realization method of the interruption of current loop is presented in details.
The Research of Fixation Method in Tea Processing Based on Fuzzy Control
Authors: Zhang Jian , Lan Yan Ting , Shao Chun Bo , Wan Yi
Published: October 2013

Aiming at the nonlinear and coupling phenomena of temperature and humidity changes appearing in the course of tea fixation, this paper introduces the fuzzy control technology in the process of making tea. STM32F107 microcontroller is as the core of the whole system and the multi-point detection system is used in real-time collection of two parameters of temperature and humidity . In addition, data transmission is realized between PC and I2C, SPI bus. The control rules and parameters of controller are formulated and the temperature and humidity of tea fixation multi-parameter control are realized. Fuzzy decoupling control is adopted to meet the process requirement of temperature and humidity change in process. It improves the precision of temperature and humidity control and the quality of tea.
Decoupling Control Strategy of Three-Phase Bearingless Induction Motor
Authors: Bu Wen Shao , Zu Cong Lin , Lu Chun Xiao , Niu Xin Wen
Published: October 2013

For the strong coupling problem of three-phase bearingless induction motor which is a multi- variable and nonlinear object, a kind of decoupling control strategy based on inverse system method is proposed. The reversibility of torque subsystem was analyzed based on rotor flux orientation, and the decoupling control strategy based on inverse system method was analyzed. Then the torque system was decoupled into two second-order linear subsystems, i.e. the rotor speed subsystems and the rotor flux subsystems. The suspension system adopts negative feedback control; the required air-gap flux linkage of torque system was obtained from the rotor flux and stator current. Finally, synthesis and simulation of the overall control system were researched. Simulation results demonstrate that good performance of decoupling control can be achieved. The presented control strategy is feasible and available.
The Design of the Synchronously Simulation System for Acceleration and Air Pressure
Authors: Ou Feng , Chen Hong , Chen Ying
Published: October 2013

In order to reflect the complex effect of acceleration and air pressure, this paper introduces a new synchronously simulate technology and analyses the principle of the synchronously simulate. The paper also designs the structure and software of the control system. At last, the paper shows the result the application. The result shows that the system is simple, reliable, and the synchronization between acceleration and air pressure is very high. The analysis can also provide a reference for similar centrifuge design personnel.
Design of Monitoring System Based on Android Platform and GPRS
Authors: Liu Xing Qiao , Chong Qing Feng , Lu Xiao Song
Published: October 2013

This paper presents a wireless remote monitoring system of water quality parameters based on Android platform and GPRS communication technology. This system realizes the remote collection, storage and management of water quality parameters, and also realize the remote control of the control nodes. In acquisition part, sensors collect data which is sent to the remote server through GPRS module, and water quality parameters from the server is sent to the Android mobile phone. In the control part, the control commands from the android mobile phone is sent to the server, and the server again send it to the lower machine to control the control nodes. After practical testing to the system in Liyang, Jiangsu province, temperature measurement accuracy reaches 0.5°C, PH measurement accuracy reaches 0.3, water level control precision can be controlled within ± 3cm, dissolved oxygen control precision can be controlled within ±0.3 mg/L, all the indexes can meet the requirements.
On Implied Defect in Elevator Control Software which Causes the Lift Car suddenly Reverse its Direction
Authors: Xie Wen Yang , Ma Yin Yuan
Published: October 2013

An implied defect in one of the elevator control software is analyzed and modified. This defect would cause the elevator keep running up and down unbreakably between the next layer and previous layer of the target layer. The modification of the control software without adding physical parts was proposed. Three software design patterns to improve the safety of the elevator control software were discussed. The methods are validated to be reliable and feasible.
Takagi-Sugeno Fuzzy Control and Lyapunov-Based Stability Control of the Single-Phase Shunt Active Power Filter
Authors: Li Lan Fang , Guo Wei Ming , Xu Bai Yu , Ma Ming
Published: October 2013

In allusion to the difficulty of achieving accurate mathematical model of active power filter (APF), the Takagi-Sugeno (TS) fuzzy control is led into DC voltage control of APF. To solve the problem of control system stability, the control approach based on Lyapunov stability theory is applied to the current control. Both methods can ensure the control accuracy and stability. By means of adaptive fuzzy neural system in Matlab/Simulink the parameters of TS fuzzy controller are optimized and experiments are performed. Results show that under the time-varying load and variation of power system parameters both robustness and control accuracy of the control system can be ensured by the proposed control method.
Kinematic Analysis of a One-Degree-of-Freedom Ten-Bar Mechanism for Search and Rescue Robot
Authors: Pu Hua Yan , Zhang Juan , Jia Wen Chuan , Luo Jun
Published: October 2013

One-degree-of-freedom ten-bar mechanism is a novel mechanism designed to clear loose debris for the search and rescue robot, which involves only one motor to generate the sweep motion. This paper established the kinematic model for the mechanism. The effects of the adjustable parameters on the tips trajectory are analyzed. From the results, a set of optimal parameters are obtained.
A Novel Design of Soft Switching Based on Three-Phase Current Source Inverter
Authors: Shen Zhong Hong , Yang Lin , Liu Qun Xing , Zhu Wen Li , Jiang Chun Xu , Chen Xiao Kang
Published: October 2013

This paper presents a novel soft switching topology and its control method applied on three-phase current source inverter. The main switch transistors of the inverter can be achieved in soft switching on the current pass-through step, which can reduce switch stress and improve efficiency. The soft switching circuit consists of two auxiliary switch transistors and some passive devices, such as inductor, capacitor and diode. It has many advantages as follows, simple control, fewer devices, high reliability, and so on. This paper analyzes the principle of soft switching circuit, and simulate by using the current space vector control method with MATLAB. The simulation results demonstrate the feasibility of the method.
Exploration of AGC Control Mode for North China-Central China-East China UHV Synchronous Power Grid
Authors: Zhou Jing , Wang Ke , Li Ya Ping , Zeng Dan
Published: October 2013

With the continuous construction of ultra high voltage (UHV) power grid, East China-Central China North China will be interconnected via UHV lines to be a UHV synchronous grid in the future. Further expansion of the grid scale, the existing active power and frequency control mode has been unable to adapt to the new features. Based on the future structure of North China-Central China-East China synchronized power grid, the article built the whole network of the AGC control model using PSD-FDS full dynamic simulation program. By the simulation of examples, the problems of AGC control mode for UHV synchronous power grid has been pointed out visually. Finally, the paper presented an ideal AGC control mode called centralized control mode to deal with the new challenge.
The Design of DC Servo Motor Control System
Authors: Dai Yue Ming , Zhu Cong Cheng
Published: October 2013

The design is to control DC servo motor and design a DC servo control system by the computer.It measures the DC servo motors parameter by measuring element (displace sensor) and transforms some forms of information by using A/D conventer to the CPU.The CPU will compare the input signal and measuring signal and if there is error, according to the predetermined control law to produce a control signal to control motor ,the system makes input signal and measuring signal keep consistent. Control algorithm use digital PID controller .
Design of LCL-Filter with Active Damping for Active Power Filter
Authors: Wang Lu Peng , Tang Zhong , Gao Wei
Published: October 2013

In this paper, the influence of gird-side and inverter-side inductance on LCL-filter performance is studied. The design method of LCL-filter applied in three-phase shunt active power filter (SAPF) is proposed. An active damping strategy using the current feedback of the filter capacitor is adopted to suppress the resonance. A practical example is designed using the proposed design procedure. Finally, Simulation and experimental results verify the feasibility of the design method.
Research on Flexible Grid-Connection Control Strategy of Distributed Power in New Energy Micro-Grid
Authors: Hu Guo Wen , Wang Lin , Wang Yin Jie
Published: October 2013

Abstract: The point of the micro-grid distributed power's control is grid-connected inverter. The flexible grid-connection control technology provided an optimizing control method between distributed power and micro-grid and between micro-grid and power system. The flexible grid-connection control strategy includes flexible grid-connection control and flexible islanding control. The flexible grid-connection control achieves the good performance by means of regulation of the active and reactive power of micro-grid, while inhibiting the impact of impulse current, smooth power output, forecasting load and micro-grid power capacity. Based on the flexible grid-connection technology research of distributed power in micro-grid, the flexible master-slave method was presented based on PQ control, and the balance of power and the flexible control in micro-grid has been reached by it. The emulation and experiment results verify that the flexible master-slave method is effective; the balance of power, the flexible control when micro-grid is in islanding mode has been reached; the feasibility of the flexible master-slave method to stabilize the system was showed.
Detection and Localization Method of Power Quality Disturbance Based on Improved TT-Transform
Authors: Song Yan Li , Tao Ran , Wang An Na
Published: October 2013

Towards the problem of power quality disturbance detecting and localization in the power system, this paper proposed a new method based on improved TT-transform. Amplitude’s mutation in maximum element sequence of the TT- module matrix’s row is detected to locate beginning and ending time of power quality disturbances. This method can not only detect single power quality disturbance, but also detect composite disturbance accurately. The simulation results show that the method proposed can accurately detect the common power quality disturbance signal.
Adaptive Synchronization Control of Uncertain Load Power Systems
Authors: Liu Di , Zhou Guo Peng , Wang Zhong You , Sun Hong Yang
Published: October 2013

This paper studies the synchronous control and disturbance rejection problem for a simple interconnected power system subjecting to a periodic disturbance with uncertain amplitude and frequency. By constructing a new exosystem, the synchronous control and disturbance rejection problem can be solved with output regulation theory. Designing an internal model for the complicated system and introducing an appropriate transformation, the output regulation problem is changed into the stabilization problem of a new augmented system. With the help of adaptive output feedback control technique, the designed dynamic energy storage controller can solve stabilization problem of the augmented systems as well as the synchronous control and disturbance rejection problem for the original system. Finally, the simulation results show the effectiveness of the proposed control strategy.
The Application of Continuous-Curvature Curve Algorithm (CCCA) in Path Planning
Authors: Meng Hua , Zhang Wei , Jiang Wen Tao
Published: October 2013

The mobile robot's traveling path is generally made up of line and curve segments, so moving process often requires frequent stops to change the wheel steering angle to alter the direction of motion, which is lack of flexibility. In this paper, the use of the continuous-curvature curve algorithm (CCCA) solves the mutant problem of the mobile robot steering angle at turns. It can connect two line segments path so that the mobile robot achieves continuous deflection in swerve process, and it also can achieve a smooth shift within the steering angle 80o.
Research on Effects of STATCOM on Voltage in Wind Farm Based on PSASP
Authors: Zheng Wei , Li Shi Qun , Zhi Yong , Bai Run Qing , Liang Chen , Wan Jian Ru
Published: October 2013

Recently, the static synchronous compensator (STATCOM) device has been installed in Jiuquan wind farm in Gansu Province. To study its ability to support voltage, this paper presents a study of the mathematical model of the steady state and transient state of STATCOM and then uses the power system analysis software package (PSASP) to establish a user-defined model of STATCOM. In addition, the model is added into the power system example (CEPRI 7). After that, the power flow calculation and transient stability calculation are carried out to simulate and analyze. At last the STATCOM device is field tested in Jiuquan wind power base. Test results verify that STATCOM effectively supports the grid voltage.
Research on MCR Type Static Var Power Compensator Device in Wind Farms
Authors: Zheng Wei , Shi Li Guang , Li Shi Qun , Zhi Yong , Bai Run Qing , Liang Chen , Wan Jian Ru
Published: October 2013

With the application of FACTS devices in large-scale new energy base, in the light of FACTS devices installed in each wind farm in Gansu Jiuquan, which can supply reactive compensation for the power transmission system and stable the grid voltage, in this paper the magnetic controllable reactor (MCR) type static var compensator (SVC) is studied deeply. The paper introduces the working principle and characteristics of the MCR-SVC. In connection with MCR equivalent circuit, the simulation model is built in MATLAB/SPS, the simulation results and field tests verify the reactive power compensation effect of MCR-SVC during wind farms.
Optimal Feedback Excitation Decentralized Coordinated Control Model of Multi-Machine Power System
Authors: Huang Xun Cheng , Qi Huan , Zhang Xiao Pan , Lu Li Fang , Hu Yang Yu
Published: October 2013

A new model based on optimal feedback gain has been proposed for the power system decentralized control. In this model, the block gain coefficient has been optimized to achieve excitation decentralized coordinated control of the multi-machine power system. The simulation of the Henan Yudong grid verified the effectiveness of the control strategy.
Urban Rail Traffic Organization Scheduling Adjustment Method
Authors: Zhou Mei Han
Published: October 2013

This paper studies on urban rail traffic organization scheduling adjustment method. It describes different kinds of disturbance events that may occur in metro operation, and analyzes how various disturbance affect traffic order. It points out that the essence of disturbance is breaking the balance between transport capacity and demand, and the fundamental purpose of scheduling adjustment is to re-match capacity and demand. Its helpful to choose the most reasonable solution that making various disturbances effects on traffic. Available and matching scheduling adjustment methods for different disturbance scenarios are expounded in the paper.
Analysis of the Public Transport Network of Shenyang as a Complex Network
Authors: Wang Dan , Li Xin
Published: October 2013

The public transport infrastructure of a city is one of the most important indicators of its economic growth and development. Here we study the public transport network of Shenyang, which represents Chinese domestic civil public transport infrastructure, as a complex network. We find that the public transport system of Shenyang, a network of public transportation routes connected by bus links, is a small-world network characterized by a Poisson degree distribution. We investigate the public transport network as a complex network to explore its topological properties. Simulation results show that the public transport network exhibits small world behavior.
Influence of Integrated Multimodal Travel Information on Holiday Trip Chain Characteristics
Authors: Wang Bo Bin , Shao Chun Fu , Li Juan , Ji Xun , Xiao Chong Zi
Published: October 2013

Based on the RP-SP data collected in the holiday travel behavior survey in 2013, this paper analyzed the impact effect of integrated multimodal travel information (IMTI) on the holiday trip chain characteristics. General statistical analysis is adopted to compare the trip chain structural characteristics, spatial-temporal characteristics and the mode split under the IMTI service or not. The results show that, under the influence of IMTI, 9% of the travelers will cancel their trips and 13% will change their trip mode. Moreover, the pre-trip information has a significant influence on the activity point number, trip chain length and travel time, has moderate influence on activity duration, and has weak influence on transfer time and trip distance. On the other hand, the en-route information has weak influence on the trip chain structure and spatiotemporal characteristics.
Study of Safety Warning Algorithm Based on the V2V Communication Network
Authors: Xu Yi Nan , Wu Fei
Published: October 2013

In recent years, the rate of the highway traffic accident remains high, with rear-end collisions accounted for more than 75%. In order to effectively reduce the incidence of rear-end collisions, this paper proposes a safety warning algorithm based on relative speeds among vehicles approaching an intersection from different directions. This algorithm relies on the GPS navigation system to obtain vehicles position and speed information, calculates the relative angle information between vehicles, and uses the information to calculate the safety distance between vehicles to determine the relationship between the safe distance and the time to collision, and to choose a proper alert system. The safety warning algorithm was implemented, simulated and verified under Matlab environment with the considerations of the influences of all kinds of road environment added to the system. The method and the algorithm proposed in this research has the advantages of broader applications in many V2V communication network systems for automobile or pilotless automobile and robot systems, and less and more efficient computation. The developed system based on the proposed research is more adaptive, safer with better fault tolerance compared with other systems.
Research and Development of Multi-Regional Monitoring Integration Technology Based on SIP Protocol
Authors: Xu Shi Jie , He Wei , Jiang Shu Ming , Wei Zhi Qiang , Zhang Jian Feng , Zhang Jiang Zhou , Zhu Lian Peng
Published: October 2013

To solve the system overloading problem of sip protocol based on centralized monitoring and management system, we propose a new protocol system based on cross-regional stratification sip monitoring integrated management platform, it uses the automatic control technology, networking and communications technology, video / audio compression and transmission technology, sensors and integrated control technology and software engineering techniques. It is an integrated platform of biometrics, intelligent video analysis, anti-theft alarm techniques, 3G video management, valuables management, multifunction video and voice network, multimedia video services, and that it can be used with existing IP network, LAN, internet, 3G network, the telephone network. It is fully compatible and can be used with existing databases, monitoring systems, television networks for docking to achieve a variety of monitoring elements of centralized management, control and interaction. The innovative applications of CSS regional stratification mechanisms, ActiveX terminal buffering mechanism and VM resource allocation mechanism can provide users real-time information. And according to a variety of real-time information, it aggregated emergency solutions of the overall regional security or certain high-risk target key places of security.
Synchronous Information Transmission in the Embedded Equipment Management Information System
Authors: Zhou Yue Jin
Published: October 2013

The problem that remained unsolved is that the real status of the equipment can not be collected in real time and it results the different statuses between the equipment and the equipment management information system (EMIS). The problem can be solved through the application of the Internet of things. A wireless sensor network was established to monitor the equipment status on the shop floor in real time. It was managed by a management server. The management server was connected to the Intranet of the company to communicate with the EMIS. In this way an Internet of things was formed to ensure synchronous status information transmission between the equipment and the EMIS. This system has been used in a large-scale vehicle manufacturing plant. The significant efforts have been made.
An FPGA Based Color Bar Signal Generator for PAL Standard
Authors: Liu Yang , Tie Yong , Xiao Ming Li , Na Shun
Published: October 2013

Color bar signal generator is one of the most important measurements for PAL TV applications. However, its use in resource constrained applications such as color TV video adjustment is limited because of the high architecture complexity involved. Due to the broad range of applications presently offered by FPGA (filed programmable gate array), their use has become increasingly widespread in different areas and sectors. In this paper, we present the design and implementation of a color bar signal generator based on FPGA and MC1377 with a high performance and low system complexity. The FPGA technology proved to be a proper platform to meet these two contrasting requirements. The signal structure, generation principle, and FPGA implementation of composite PAL synchronize signal and RGB color signal are described. The interface circuits, hardware and software of the system are introduced. The software is simulated using MAXplusII platform. Simulation results indicate the effectiveness and stability of the signal generator.
A Low Noise and Computer Controllable Oscillator for CPT Atomic Clock
Authors: Xu Jian , Lin Ting , Gan Zhi Yin
Published: October 2013

This paper presents an digital microwave oscillator which employs a phase lock loop (PLL) chip and a direct digital synthesizer (DDS) chips to realize a pure frequency at 3.417GHz (half of the 87Rb atom ground-state hyperfine transition frequency) for the coherent population trapping (CPT) atomic clock application. And at this frequency, the oscillator demonstrates low noise (lower than-50dBc/Hz@100Hz and lower than-55dBc/Hz@1kHz) and purity. Moreover, based on the communication between a computer and the MCU, this oscillator could be completely controlled by self-developed user interface.
Simulation of Electrodes Configuration that Used in a MALDI-TOF-MS System
Authors: Wang Yi Zhen , Yu Yang , Xu Jian Sheng , Wang Ming
Published: October 2013

The effectiveness of the focusing electric area would make influence on resolutions of the device immediately, which made its parameters important. The purpose of simulation in this article was providing valuable reference for the future mechanical processing. Keys to the parameters of a focusing electric area were voltages and the inner diameters of the electrodes. Firstly we estimated the parameters relying on the fact that ions abided by the law of energy conservation through the electric area. Secondly we used the software simion to turn 3D figures of electrodes to an available model, then flied the ions. In the end a group of parameters were obtained. We simulated ions that shared the same mass number 30000Da and initial kinetic energies were an arithmetic progression with 5eV as common difference. The variance of flight time of the groups with delayed extraction was 0.0177,while the groups without delayed extraction was 0.0618.
The Design of the Intelligent Health Information Collection Terminal which is Based on the Embedded Technology
Authors: Ding Ye , Gang Shi , Wei Zhao
Published: October 2013

The paper introduces an Intelligent Terminal which is based on the embedded technology to address the low degree of integration and intelligence of the current Health Collection Information Terminal. The new terminal adopts the design of the structure and function integrating method to integrate six health parameter measuring functions in one suit, including Electrocardiogram (ECG), Respiratory Rate, Blood Oxygen, Body Temperature, Blood Pressure and Pulse) , which is easy to carry. The additional interpersonal interfaces like storage, printer, monitor, communication and Radio Frequency Identification (RFID) enhance the new terminals intelligence degree. It could be widely applied in the situations of hospital, community, disaster relief and military.
The Research of Switch Control Module Based on Distributed Computer Interlocking System
Authors: Kuang Wen Zhen , Cao You Jie
Published: October 2013

Distributed computer interlocking system moves the trackside execution unit of indoor close to the controlled device,it realizes the distributed control through the security communication module. The article describes overall structure of the system and four-wire switch control modules main functions in all modules as well as the hardware structure introduced. The control circuit of switch and the indication acquisition circuit are mainly analyzed. In order to improve the reliability of system,the module uses the working pattern of dual system hot spare . In this paper,operating principle of dual system hot spare and hot standby switching circuit have been mainly illustrated and described
Key words: Switch control module; Fail-safe; Dual module hot spare; Computer interlocking system; Distributed control
A Simple Equivalent Circuit for Small RFID Tag Antennas in Low Loss Dielectric Materials
Authors: Liao Yi , Zhang Yuan , Cai Kun , Gao Wei
Published: October 2013

Small radio frequency identification (RFID) tag antennas are generally designed to achieve conjugate matching with capacitive chips at the called tag resonant frequency. An approximate equivalent circuit is proposed to represent the antenna input impedance in low loss dielectric materials. It consists of a shunt conductance considered to be linearly proportional to loss tangent, an input resistance and reactance of antenna in lossless materials. Comparing with the simulated result of full wave numerical tool, the equivalent circuit gives acceptable errors in input resistance and reactance at the tag resonant frequency and nearby. The simple equivalent circuit can be used to reduce the repetitive simulation work for different loss tangent.
Handheld Terminal Design Based on Wireless Sensor Internet for Contestants
Authors: Sun Yi Zhen , Han Xiao Wei , Li Chang Tong
Published: October 2013

To tackle the problems brought by the wired terminal multiplying and complexity of the wireless terminal cluster, the thesis designed handheld terminal design based on the wireless sensor Internet for contestants. It solves problems such as complex cluster and bad communication performance of the terminals in traditional contests with the help of zigbee technology. Besides the common function, it possesses extra functions, such as voice prompting, judge scoring and audience voting. The thesis mainly deals with the hardware and software design. The test result shows such design can better meet the needs of sorts of contests with the advantages of automatic networking, multiple function and stable performance, etc.
Application of Embedded Technology and CAN Bus in Seismic Data Transmission in the Field
Authors: Song Jun Lei , Chen Ying , Wang Dian Hong
Published: October 2013

Both the networking mode and data transmission mode of the field mobile seismic station concern such matters as richness, real-time and effectiveness of seismic data. In light of the effectiveness, distance, cost and construction relating to data transmission in the field environment, CAN bus was utilized to connect the scattered seismic collection nodes, and the embedded microprocessor ARM was used to manage collection nodes within a certain scope. In addition, both the multiple task operating system Linux and application framework Qt were employed to construct a seismic network local management system, which significantly simplified the management task of mobile station. Such networking and data transmission mode shows such features as lower cost, easy construction, and higher reliability and instantaneity, also enables the possibility of constructing a mobile collection station with larger scale.
Discrete Memoryless Multiple-Access Wiretap Channel with Non-Cooperative Encoders
Authors: Dai Bin , Wang Yong Tao
Published: October 2013

In this paper, the discrete memoryless multiple-access wiretap channel (MAC-WT) with non-cooperative encoders is studied, where two users (cooperation between the users is not allowed) transmit their corresponding confidential messages (no common message) to a legitimate receiver, while an additional wiretapper wishes to obtain the messages via a wiretap channel. The inner and outer bounds on the capacity-equivocation region are provided forthis new model, and the result is further explained via a binary example.
A Method to Improve the Security of Screen Lock for Android Mobile Phones
Authors: Zhang Ji
Published: October 2013

Mobile phones become popular, and Android is the most popular open source mobile platform. To protect the mobile users security and privacy, it is necessary for us to adopt certain secure screen lock mechanism. Regrettably, existing screen lock mechanism failed to provide more stronger security. In this paper, we present a method to strength the screen locks security. Our evaluation shows that our screen lock is stronger than the existing mechanism.
The Research on a Reactive Allocation Setting Method in Distributed Wind Farm Based on Reducing Generator Loss
Authors: Li Wei , Yan Ning , Xing Zuo Xia , Zhang Bo
Published: October 2013

In this paper, the reactive power control strategy of distributed wind farm has been researched, a reactive allocation setting method based on reducing generator loss has been has been proposed. First, the doubly-fed wind turbine generator reactive power support capacity and the relation of reactive power to generator loss have been researched, then, aiming at tracking control on overall station level of wind farm reactive power, a single-target multi-constrained optimal allocation of reactive setting method has been proposed, finally, by case study, the effectiveness of this allocation setting method has been verified. Compared with in average allocation setting method, the loss can be decreased 2%, the power generation capacity can be improved, and the method is more effective in large area.
Design of SDLC Communication Module Based Windows CE
Authors: Piao Yong Jie , Liu Chun Yu , Xu Wei
Published: October 2013

SDLC bus communication module was designed and implemented in this paper. AM85C30 is used to accomplish the SDLC protocol control and adapts to PC/104 bus. Driver software is designed based on DMA streams driver under Windows CE 5.0. In order to achieve the maximum baud rate and lowering down the CPU usage, data exchange between AM85C30 and the host is implemented using DMA. Software circular FIFO is designed for buffering the SDLC frame data and status information, solving the frame losing problem when transferring data in high speed. RS485 bus is used in physical layer and works in half-duplex mode. The network topology is simplified and communication reliability is enhanced. The SDLC module is deployed in a launch vehicle video acquisition system. Field working indicates that the system can achieve stable speed of 2Mbps for both channels simultaneously.
A Simplified CE Stopping Criterion for BICM-ID System
Authors: Li Miao Miao , Li Jian Ping
Published: October 2013

The iterative process of bit-interleaved coded modulation iterative decoding (BICM-ID) leads to the increase of computational complexity and decoding delay at the receiver, although it owns remarkable bit-error-rate (BER) performance both in additive Gaussian noise (AWGN) channel and Rayleigh fading channel. A variety of the stopping criteria are put forward to reduce the unnecessary iterations in the process. This paper presents a simplified cross-entropy (CE) stopping criterion based on CE criterion, which sets self-adaptive thresholds for different SNRs to decide whether to calculate the CE in the receiver. Simulation results show that the simplified CE criterion can obtain a better performance and lower computational complexity. The iterative number of the simplified CE criterion is about 12.2% less than the conventional CE criterion.
A Mobile Monitoring Extension of PC-PLC Architecture
Authors: Dong Hao , Liu Yu , Li Peng , Yang Qiao Hu
Published: October 2013

In view of the popularity of mobile device within the industry, a mobile monitor extension of PC-PLC architecture is designed and implemented. The extension module utilizes OLE for Process Control (OPC) technology to access industry control configuration software, and then publishes monitoring operations as service by employing Windows Communication Foundation (WCF), so that management staffs can monitor the process of production by any mobile device which has ability to invoke web service. Since Android operation system has a high market share, some industry controls based on Android are developed, which have been used to configure production pictures. Combing production picture generated in advance and real-time production data, the extension module is able to provide the capability of visual monitoring at any time and place.
Intelligent Thermometer Design Based on SCM
Authors: Zhang Jian Lin
Published: October 2013

An intelligent thermometer system design is presented in this paper. There are temperature sensor module, data collection module, data processing module, keyboard number tube module, voice module and LCD display module in this system. Due to excellent performance of temperature sensor, temperature sensor is used in system to obtain the temperature, transform the voltage, amplify OP precisely, and get 12 bits accuracy of samples. In order to make the system interface friendly, embedded software is developed to realize such functions as alarm temperature settings, LED screen display, audio playback and so on.
A Service Publishing and Service Location Algorithm for Internet of Things
Authors: Zhu Shu Ren
Published: October 2013

The designation idea and the hierarchy model for the WSDS based on double hierarchy topology have been described. In order to support QoS-based Web services publish and discovery, the QoS broker mechanism is introduced into the traditional Web service discovery model. On the basis of these, according to the characteristics of QoS requirements of different users, a QoS-based Web service discovery algorithm is proposed. Put forward dynamic tuple model, give two-phase service location algorithm adapting double hierarchy topology network, and then compare and test with the correlative work of UDDI. Hierarchy model is introduced to defining dynamic tuple model in the data-level for resolving the heterogeneity between diversified data source and data modal. The unified publish and query API customized to implement unified accessing mode in the abstract level. The scalability, agility and robustness of the WSDS are assured by a double hierarchy topology structure. The experiment result indicate, double hierarchy topology system has obvious self-organization and well scalability, and adopt to the independence of web service, dynamic change and strong distributing, at one time, two-phase service location algorithm has well abilities of service location.
Using Pop-Up Form in Web Applications
Authors: Lou Bu Ye , Zhao Jin , Weng Shuo
Published: October 2013

Pop-up form is a method to design web pages. It divides web pages into information interface and interactive interface. The initial state of interactive interface, namely interactive form, is hidden. And it can be opened when needed. Users interact with web applications through pop-up forms, and request data processing functions of Web applications based on Ajax technology. First, the concept of pop-up form and how it works are described in this paper, and then the methods and techniques to implement pop-up forms in JSF applications are introduced. Finally, the benefits of using pop-up form are summarized.
An Algorithm of LDA Topic Reduction Based on Rough Set
Authors: Wan Hong Xin , Peng Yun
Published: October 2013

The topic model LDA can uncover latent topics in text mining, through the probability distribution of words in the text to get the distribution of topics. This approach ignores the correlation between the topics, so in some actual domain it is not enough to reflect the real situations of the topics. We can divide the topics into two classes: key topics and unimportant topics. The key topics can reflect the word attributes well, and other topics can be look as subordinate. Considering the relations of the topics, a topic reduction algorithm is proposed to retain the key topics and delete the redundant topics based on rough set. Because the LDA topics exists uncertainty distribution and rough set can deal with uncertain data well, so the algorithm based on rough set can improve the accuracy of topics analysis.
Design and Implementation for the Firewall Policy Analysis and Configuration Tools
Authors: Shi Jian , Deng Song , Lin Wei Min , Zhang Tao , Ma Yuan Yuan , Li Wei Wei
Published: October 2013

The firewall is one of the most important network security facility and is widely used as a base infrastructure in a large enterprise network. When policy changes, the administrator must find all the potential conflicts between existing policies to ensure network security. That's a waste of time and energy. Proceeding from the demands, this paper analyzes key points and difficulties in the design process for the tools, applies mature algorithm of policy conflict detection, and finally proposes a flexible and scalable design. The prototype system proves that the tool does effectively detect all conflicts in policy set, and in the form of reports for the administrator.
Research on Design of IETM General Developing Platform Based on GB/T24463
Authors: Zhang Jian Qiang , Zhang Jun , Zhao Hong Yan
Published: October 2013

In order to reduce the costs during publish and maintenance of equipment technical information, and improve the effective management and application of equipment support information, the key technology of preparing IETM based on GB/T24463 is introduced, and the development process and structure of IETM system based on GB/T24463 is analyzed, developing an IETM solution integrating compiling, reading and management in one, and with the design and achievement of all functional modules of IETM system being discussed in details.
Bluetooth-Based Wearable Human Respiratory Parameter Monitoring System Design
Authors: Chang Fei Ba , Yin Jun , Yan Le Xian , Peng Run
Published: October 2013

Designed a Bluetooth-based wearable SAHS (sleep apnea hypopnea syndrome) monitoring device, the device can be real-time monitoring in the SAHS patient's respiratory state. Meanwhile, wearable technology achieves basic respiratory signal acquisition for low physiological and psychological load; Bluetooth achieves short-distance wireless transmission of respiration data and convenient communication with the handheld terminal such as PDA or smart phone, to ensure the continuous real-time monitoring of the patient.
A Data Delivery Controller for Mobile Communication Based on Multiple Threads Mechanism
Authors: Ni Kai
Published: October 2013

With the rapid development of communication technology, wireless internet technology and the increasing number of mobile phone users, people were more concern on the efficiency of real-time information service. Based on communication mechanism of multiple threads, a data delivery controller for mobile phone communication was presented in this paper. The server side controller designed on Java multiple threads and provided efficiency data response for request of android mobile phones. By our experiment, the average response time on the server was 3.8s on ten million times addition calculation, which can effectively meet the real-time requirements of mobile communication.
Distributed Customer Service Management for Internet of Things
Authors: Zhu Shu Ren
Published: October 2013

It extends the network management mode of CSM, and offers a service-oriented management interface between customers and service providers. Extends some provider’s service management towards the customers and enables customers to monitor and control information about service-specific QoS parameters. Logical network, a hierarchical presentation of abstract network is presented; the definition, attribute, structure and computing method of the logic network is discussed. The presentation and access of CSM-MIB which is implemented using distributed objects is completed; by taking advantage of logical network, the abstract customized views of physical network is built and the management functionalities of agreement, assignment, performance monitoring and reporting of CSM are implemented. Practice in implementing CSM system indicates that it is a reasonable method to construct CSM system using distributed object technology. Service Management is a developing new network management paradigm. At current stage, the applied CSM target concentrates on IP connection service.