bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Implementation of New Embedded Network Management and Monitoring System
Authors: Lu Bin , Zhang Yan Gan , Zhang Jin Nan
Published: December 2012

Embedded devices are confined to be agents although they have been deployed in network management system for decades. We shed light on this situation by designing and implementing a new full-featured embedded network management system. On one hand, this system can still be an agent; on the other hand, this system provides a friendly GUI and I/O devices such as mouse and keyboard, which allows administrators to conveniently monitor and configure the managed equipment. The new system is developed on ARM with Linux using multithreading method, and it is deployed on ROADM equipment in optical network. SNMP is applied to be the network management protocol.
Directional Smoothness Constraint Based Error Concealment
Authors: Zhang Rong Fu , Yuan Qin Peng
Published: December 2012

Video signal is a highly compressed signal due to the restricted bandwidth of the Network. However, the compressed bitstreams are very sensitive to channel errors. In this work, a novel algorithm is presented for repairing damaged DCT coded images while decoding/transcoding an error bitstream. The algorithm first estimates the edge direction in a damaged block by considering edge features in its neighborhoods, where the features in each neighborhood are detected by only using two low frequency DCT coefficients in the block. And then the damaged block is reconstructed under smoothness constraint along the edge direction. Experimental results demonstrate that the proposed algorithm can obtain better subjective and objective quality than conventional algorithm.
Experimental Platform for Feature Selection of Signal of Ball Mill
Authors: Feng Xue , Zhao Li Jie , Zhang Yu Chen
Published: December 2012

Ball mill load monitoring and rational parameters setting are important to ensure the ball mill long-term stable operation. Although vibration and acoustic signal of shell contain plenty of information about mill load, it is difficult to select the feature of them in time domain. Due to the high dimensionality and colinearity, models based on frequency spectrum are complex and with a low generalization and the irrelevant spectral variables deteriorate their quality. This paper use Synergy Interval Partial Least-Squares Regression(SiPLS) to select the feature frequency bands of vibration and acoustical, which are directly relevant to the parameters of ball mill load, and build effective prediction models. The experimental platform combines the strengths of MATLAB with the benefits of C#.net to implement the functions of frequency feature selection, feature modeling and load parameters prediction. Test results show that the platform selects the frequency spectrum feature effectively, and the generalization of mill load models are improved.
The Design of Insulator Leakage Current Monitoring Device Based on MSP430 Microcontroller
Authors: Zhong Dan , Hu Jian Xun , Ding Wen Fang , Chen Hui
Published: December 2012

This article describes a transmission line insulator leakage current monitoring device, the device is based on the MSP430 ultra low power mixed signal controller design, both the transmission line insulator leakage current rms leakage current pulse, the leakage current pulse frequency and ambient humidity characteristic quantities to be monitored, with low power consumption, high reliability.
The Iteration Method for Depth Extrapolation of Ship’s Electric Field
Authors: Hu Ying Di , Gong Shen Guang , Yang Xue Fei
Published: December 2012

An iteration method was advanced to solve the problem of ship’s static electric field extrapolation to shallow depth. Based on the vertical partial derivative of each component of static electric field and using derivation formula, the static field values of the points on the target depth that had same coordinates as the measured points were calculated iteratively. The simulation result shows that this method can be easily carried out and has a high calculation precise.
Effects of Measurement Error on Process Signal Detection
Authors: Yang Su Fen , Yang Chung Ming , Cheng Ging Yun
Published: December 2012

Many data comes from a process with variables having non-normal distributions. The commonly used Shewhart variable control charts which depend heavily on the normality assumption should not be applied here. Further, measurement error of an instrument or gauge is an important factor in industry that influences the outcome of a process. Incapability of the instrument or gauge would cause the observation measure deviates from the true value and consequently lead to a false discrimination between good and bad service quality and manufacturing parts. In this study, we propose a new EWMA control chart to monitor the exponentially distributed service time between consecutive events with the measurement error instead of monitoring the number of events in a given time interval. We showed that, in the case of the measurement error following a normal distribution, the performance of the EWMA-M chart is significantly affected. We suggest letting for keeping the chart with the same detection ability; otherwise, the chart’s detection ability would be much poor than the charts with no measurement errors
Experiment Research of Solar Energy Ozonizer Used in Sewage Treatment
Authors: Dong Li Mei , Zhou Ying Chang , Han Ze Chi , Wang Fei , Wang Yong Qing , Wang Qing Jun
Published: December 2012

The device is composed of solar battery, power automatic switching, high pressure booster inverter, dielectric-barrier discharge type ozonizer, air compressor and microporous aerator components, whicn is powered by the double power suppl y modes including the solar battery and the city electricity. In the conditions of insufficient illumination or rainy weather, power can switch to the city electricity automatically. The article introduces the composition and working principle of solar ozonizer. The experiment is respectively done in the sample of the second phase of water from BaoDingYingdingzhuang sewage plant, the urban river water and the dyeing effluent with 1500 ml.The power of the solar energy ozonizer is 18W and ozone production is 25 mg/min. The experiment results show that the removal rate of Fecal coliform, Chroma and Chemical Oxygen Demand (COD) are obviously improved. Especially, the removal effect of Fecal coliform and Chroma is very significant. The experiment indicates that the content of NH3-N has increased with the growth of ozone contact time.
The Design of Controller in AVS Video Decoder Chip Based on Openrisc
Authors: Lv Qian , Zhang Jin Lan
Published: December 2012

Separate software is hard to achieve real-time HD decoding for its sequential execution, while pure hardware is unable to complete the complex AVS video decoding. Aiming at this, this paper adopts the SoC scheme to develop the controller in AVS decoder. The author selected the OpenRISC1200 processor for its no licensing fees and completely open source. For AVS decoder’s high-complexity, we reconfigured the core to optimize it and designed some peripherals - SDRAM controller, VGA controller, and Wishbone bus module. By elaborating the module’s design, simulation, synthesis, static timing analysis and formal verification, this paper proposes a solution of high-speed & high integration controller in AVS-SoC decoder chip. This controller can quickly complete the AVS stream parsing and system controlling, and also it can improve the AVS chip’s integration and the versatility. Overall, it has great application value and broad market prospects.
Application of ACO-BP Algorithm in Automobile Automatic Transmission Shift Control
Authors: Chen Jian Xue , Yu Shui
Published: December 2012

Combining ant colony optimization (ACO) algorithm with back-propagation (BP) algorithm, the ACO-BP algorithm is proposed to optimize shift decision based on the vehicle velocity, the vehicle acceleration and the throttle opening. Both BP local search capability and global search ability of ACO are utilized, where ACO is used to train the BP network weights and thresholds. Experimental results show that the proposed automatic transmission shift control system has good capability of gear recognition, and can make shift decision promptly and effectively.
Based on the Fuzzy Control of Intelligent Constant Pressure Water Supply System Research
Authors: Qi Xiang Dong , Yuan Xi Ze , Yu Shao Juan
Published: December 2012

In view of the constant pressure water supply system with multi-parameter、non-linear and large delay characteristics, this paper employs PLC and the technology of frequency conversion control, and introduces fuzzy control technology to perform constant pressure water supply. The controller can automatically adjust the parameters online, i.e., according to the different work conditions, the controller can choose the proper control parameter, so that the water pressure regulation in water supply system will obtain effective control. The simulation results and the practical application show that our fuzzy controller achieves competitive performance: the faster response, reduced overshoot, greatly shortened transient time, the fewer oscillation, strong robustness and good stability, which can improve efficiency and bring cost saving.
Design on Distributed Fault Monitoring System for Navigation Lights
Authors: Tan Ying , Xiao Chun , Zhang Xing Fei , Li Qiang , He Yi
Published: December 2012

For the environment of using the navigation lights and its requirement, a distributed fault monitoring system on the navigation lights is designed. The three-layer structure with slave station and master station and Voyage Data Recorder is employed in the system, which can monitor broken wire fault, short circuit fault and power failure on navigation lights. The mature RS485 communication circuit is adopted in communication interface not only between the master and the slave, but also between the master and VDR (Voyage Data Recorder). The master station gets the information of all navigation lights from the slave stations, and sends these received data to VDR after being processed. The system has been successfully applied in practice, and can effectively monitor the state of the navigation lights and give the alarm information when in fault. In addition, the monitoring system can quickly and accurately trace the fault position and type, so the navigation lights can be maintain timely.
Real-Time Simulation Study of Dynamics for Electric Drive Tracked Vehicle Based on Vortex
Authors: Li Bing , Zheng Jianhua , Zhou Yang Hui , Luo Li Xi
Published: December 2012

Aiming at the problem of real-time simulation of vehicle dynamics. Dynamic model of tracked vehicle was built in Vortex. Base class of vehicle was secondary developed to apply torque to the sprockets directly. Finally, dynamics model of electric drive tracked vehicle was established. Under different conditions，the dynamics real-time simulation was carried out. The results showed that the vehicle dynamic simulation in Vortex ensures high accuracy and also has a good real-time.
Research and Design of LED Base Board Automatic Processing System
Authors: Liao Wei Qiang , Luo Zhi Yun , Yao Guang Zhi
Published: December 2012

Designed one simple and usefully LED base board automatic machining device, which could control the aiguille to three-dimensional. The machine connected to PC and directly control by PC, which easy to learn with friendly interface.
Research on a Novel Soft Starting Method of Super High-Power and High-Voltage Motor
Authors: Wang Yi Fei , Yuan You Xin , Xu Yan
Published: December 2012

The supper high-power and high-voltage motors are characterized by high staring current, low power factor and a large number of higher harmonic currents. Under different loads, the parameters such as the staring current, reactive power consumption, and harmonic current, are nonlinear, variable and coupling. Therefore, a novel soft starting method of super high-power and high-voltage motor is presented in this paper, to achieve quick and smooth motor starting; keep the power factor and the 5th harmonic current in permitted ranges. The following works have been done in the study: design the structure, analyze the principle and advance a cooperative control method of the system to integrate voltage-adjusting, current-limiting, dynamic compensation and harmonic filtering. The soft starter of super high-power and high-voltage motor developed with this method has been successfully applied to the fans load of 10kV, 21000kW, and got the better effect.
Safety Monitoring and Protection System of Tower Crane Based on ARM
Authors: Chen Guang Zhong , Zhang Bing , Yang Yue
Published: December 2012

In order to monitor real-time running state and solve the overloaded security issues of tower crane, the monitoring critical parameters of tower crane are analyzed and the structure about tower crane safety monitoring and protection system based on the ARM and multi-sensor is concluded. The software system was designed with the modular structure and multithread technology and friendly interface were designed, which show the real-time key information of tower crane safety monitoring and protection system. The system was verified in Xiang Tan Jiang Lu Electric Group Company Limited and the working stability of sensors and real time display function of the acquisition information system were tested. It is proved in practice that the system is consistent with the tower crane safety monitoring requirements of GB
Self-Operating Differential Pressure Control Valve Testing Research Based on the Multi-Functional Fluid Apparatus
Authors: Sui Zhong Wei , Guo Jian Xiang , Gao Guo You , Qiang Jia Wen
Published: December 2012

Self-operating differential pressure control valves has been widely used in HVAC system because of its unique control functions .For the research and development of the valves, a large number of performance parameters such as flow-resistance and controlled pressure difference are required.This paper proposed a multi-functional fluid apparatus on the basis of virtual instrument technology and variable frequency technology which can achieve continuous sampling of the test point.The measurement method and valve characteristics analysis are also practised.
Study on Traffic Signal Control for Single Intersection via Fuzzy Logic
Authors: Chen Fu Yang , Chen Zhi Chao , Jiang Feng
Published: December 2012

Considering the status of the modern road transport system, traffic signal control for isolated intersection is studied in this paper. A traffic signal control method for six-phase intersection is proposed in this paper, aiming at reducing the average waiting time of vehicles. A two-stage fuzzy controller for this method is designed in the paper. This method takes into account not only the traffic condition of the current prevailing phase and the next phase, but also the traffic demand of the vehicle flow that turn right, non-motorized traffic flow and pedestrian. Taking the average waiting time of vehicles as the evaluation index, we make simulations on the control method proposed above. The result for the simulation shows that the performance of this method is superior to that of the timing signal control method.
Temperature Control System Design of Rapid Thermal Cycle Injection Moulds with Steam Heating of Display Shell
Authors: Huang Feng Li , Gu Jin Mei , Xu Jin Hong , Shuai Nan
Published: December 2012

Rapid thermal cycle injection molding technology with steam heating can solve the defect in routine injection process thoroughly, such as short shot, jetting and weld lines etc, it is widely used in large injection mold with high forming quality requirements. In this paper, temperature control system of rapid thermal cycle injection moulds with steam heating of display shell is designed. First, give the overall dimension of display shell, heating and cooling method and the layout scheme. Second, give the control scheme and control parameter of display shell mold temperature. Last, the hardware, software, temperature control algorithm and human-computer interface of temperature control system is designed detailed after the type of PLC and design software of human-computer are chosen.
The Cyclic Scheduling of Material Transporting Robot in Group Shop
Authors: Nie Xiao Dong , Chen Yue Ping , Yang Yu Jun
Published: December 2012

Group shop has the character of job shop and open shop, one robot is used to transport material, and the robotic cell produces multiple types of parts for a long time. In order to improve throughput, or minimize the cycle time, we establish the model of robotic cell, develop optimizing algorithm, and do computational experiments to find the better activity sequence for the robot.
The Remote Intelligence Supervisory System of Heat-Exchanging Station Design and Implementation
Authors: Tian Hai , Liu Hui
Published: December 2012

The paper come up with a design method about remote and intelligent monitoring system of heat-exchanging station, It adopted fuzzy controller to compute the given temperature of secondary water supply, and used fuzzy PID controller to regulate the valves opening degree, two controllers were built in Matlab software Fuzzy Logic Toolbox, the system adopted Profibus-DP to communicate, and used WinCC configuration software and GPRS communication module to supervise the main parameters of heat-exchanging station, the parameters included temperature and pressure of the secondary water supply. This design enhances intelligentized level and real-time control. And the design also can provide technical support for the similar system.
A Multi-Level-Objective-Oriented Method for Coordination and Control of Voltage and Reactive Power in Distribution Network
Authors: Xie Lin , Su Yi Rong
Published: December 2012

A multi-level-objective-oriented method for coordination and control of voltage/reactive power in distribution network is proposed. By referring to the demand for integrated voltage and reactive power control between county and district power network, three-level objective include regional voltage control of the gate area, gate power factor control and reactive control within the power station of the gate area. The control strategy of the adjusting unit based on the nine-zone theory is analyzed, and then the correspondence between the global AVQC and local VQC is discovered, based on which the optimal and suboptimal control strategy of the adjusting unit are proposed. Finally, three steps including urgently cutting off the capacitors, combinatorial control of the capacitors and combinational control of the transformer stalls are taken one after another to realize the coordination and control over the voltage and reactive power between the superior and inferior power network. This method is implemented in the AVQC system of TianJin Chengxi grid, which operates stably and has gained good effect.
Accuracy Calibration of 5-Axis Machine Tool Based on a Laser Approach
Authors: Pan Fang Yu , Yin Jian , Li Ming
Published: December 2012

To improve the machining precision and reduce the geometric errors for 5-axis machine tool, error model and calibration are presented in this paper. Error model is realized by Denavit-Hartenberg matrixes and homogeneous transformations, which can establish the relationship between the cutting tool and the workpiece. The accuracy calibration was difficult to achieve, but by a laser approach, the errors can be displayed accurately which is benefit for later compensation.
A Study of Tri-Axial Fluxgate Magnetometer
Authors: Zhang Yue , Cao Chen Xiao
Published: December 2012

This paper is devoted to study tri-axial fluxgate magnetometer, and it begin with principle of fluxgate magnetometer, and then its structure, electric design and test result analysis are introduced. At present, its development tendency is to simplify and miniaturize, we carried out study of tri-axial fluxgate magnetometer. Its technical specifications such as resolution, noise, response of step up, setting up time and sensitivity meet or even better than original design requirements. At first design of tri-axial fluxgate magnetometer is determined and a transducer is developed. Secondly, a high temperature circuit is developed with SOI (Silicon on Insulator) electronics wafer and hybrid circuit technology. At last, 5 specifications test results are presented from aspects of high temperature and high accuracies, respectively.
Analysis of Phase Lock Loop Closed-Loop Drive Circuit for Silicon Micromachined Resonant Accelerometer Based on the Average Method
Authors: Yang Hui , Huang Li Bin , Zhao Li Ye , Li Xiu Liang
Published: December 2012

This paper studies the control theory and the methods of the silicon micromachined resonant accelerometers(SMRAs). According to the structure and movement of the resonant accelerometer, the model of its dynamics and the equations of motion are deduced. The model of the closed-loop control is set up with the phase lock loop (PLL). The principle of PLL is expounded in detail. The requirements for phases and gains of the sinusoidal self-drive-oscillation are met by PLL. The average method is to take the average of slowly changing variables within a cycle to find the solutions of nonlinear equations. Using the average method, it analyzes the PLL’s phase control methods in depth and derives the system stability condition. The simulation results verify the correctness of the stability condition. It provides a guiding theory for the realization of SMRA’s precision control.
Control Method of Brushless DC Motor Applied in Human Skeleton Booster
Authors: Zhao Hong Song , Bai Long , Zhou Yuan Jun , Dong Zhi Cen , Zhao Jing
Published: December 2012

This paper carries research on the method of smooth method of Brushless DC Motor. Brushless DC motor applied in human skeleton booster is required to switch frequently among four-quadrant operation states of forward rotation, backward rotation, electro motion and braking control. Basically, this switch is expected to be soft. That means it is unexpected that motor comes about the phenomenon of impact of great force, speed mutation and so on. According to the requirement, the paper presents the design of driving circuit of brushless DC motor and put forward a corresponding control method. In the end, the paper proved the correct of this method by using simulation and experimental data.
Regulator Strategies for Switched Reluctance Generators Based on Direct Energy Control
Authors: Liu Yong Zhi , Sheng Zeng Jin
Published: December 2012

The causes of voltage ripples in switched reluctance generator (SRG) are analyzed. At first, on the foundation of the driving circuit with a three-level topology, the energy conversion relations in different rotator positions or in different electric level states was set up. Secondly, the SRG outputting voltage was controlled by a new method named direct energy control. Then, the hysteresis control logic of the direct energy control was designed. At last, we conduct the simulation experiments. The simulation results show that this method can effectively decrease the output voltage ripples of SRG.
Research and Application of Voice Chip in Pedestrian Voice Unit of Electric Vehicles
Authors: He Xue Jiao , Wang Xiao Li , Huang Zhi Fu
Published: December 2012

Focusing on the study of the application of voice single-chip microcomputer of pedestrian voice unit in electric vehicles, this paper mainly discusses and analyzes that how to drive the voice chip of pedestrian voice unit. Acted as voice part of pedestrian voice unit in electric vehicles, voice single-chip microcomputer is used not only to achieve the better quality and stability, but also to play voice assembly and insert perfect mute by using the related voice chip software compared to the other similar simulate voice. This paper proposes the solution of installing pedestrian voice unit that eliminates radically the potential safety hazard of “being too quiet” in electric vehicles, thereby further promotes the popularization of electric vehicles.
Research on Observability of Non-Maneuvering Target Tracking Based on Multiple Observers Range-only
Authors: Wang Lu , Liu Zhong
Published: December 2012

Analysis on observability of tracking system is the premise and basis of target tracking. Only if the observable condition is fulfilled could the system have correct solution and the effective tracking of target could be realized. Aiming at the nonlinear characteristic of non-maneuvering target tracking system based on multiple observers range-only, the observable condition of judging for this system could be obtained and the correctness of the conclusion is verified by simulation.
Study on the Acceleration Process of Water-Jet Propulsion Ship
Authors: Li Kun , Li Wen Hui
Published: December 2012

The acceleration process was studied in the form of co-simulation. The diesel engine model and water-jet pump model were derived and presented respectively in AMESim & Simulink. The engine acceleration parameters are calculated through the simulation which ran taking operation restricted zone of the pump as a constraint.
Synchronous Control Technology Research of Hydraulic Lifting System
Authors: Hu Chun Hua , Wen Chao , Mei Wen Ming
Published: December 2012

In conventional “flow control valve and travel switch” control strategy, relative height difference between multiple cylinders only reach accuracy of centimetre grade, which can’t meet synchronous control accuracy requirements of many engineering. In order to improve multiple cylinders synchronous accuracy of the hydraulic lifting system, this paper takes a hydraulic lifting system as basis, which studies PID closed loop control system using electro-hydraulic proportional valve and high-precision displacement accuracy sensor, and the synchronous accuracy of 4 cylinders hydraulic lifting system is improved to millimetre grade.
Transient Stability Analysis of Power System Based on Time Domain Simulation
Authors: Pi Liang , Wang Chen , Zheng Wei
Published: December 2012

Single-machine infinite-bus system and two-machine system simulation models were built to study the power system transient stability. Based on time domain simulation, the effect of generator inertia time constant (τg), and excitation system ceiling voltage (Ke) on transient stability were analyzed by single-machine infinite-bus system. The changes of transient stability of two-machine system were also compared by means of power system stabilizers (PSS) and static VAR compensator (SVC). In particular, the system transient stability varied greatly in different locations of SVC. Finally, some suggestions concerning the improvement of power system transient stability were put forward.
Tuning of PI λ Controllers Based on Gain and Phase Margins and its Application in Water Tank
Authors: Wang De Jin , Zhang Fu Qiang , Cai Guo Juan
Published: December 2012

This paper discusses the parameters tuning of fractional-order controller satisfying the desired gain-margin and phase-margin specifications in terms of a stability equation method applicable to fractional-delay systems. The tuning procedure is then applied to the level control of double water tank, which is modeled as a second-order transfer function with time-delay. The Matlab simulations and the experiments on the water tank device show the effectiveness of the tuning and the benefits of using fractional-order controllers.
A Hybrid Control Study of Bearingless Induction Motor
Authors: You Xiu , Yang Xiao Jing
Published: December 2012

The bearingless motor combined technical characteristics of motor and magnetic bearings. It can simultaneously implemented electromagnet torque control and suspension control all in the motor .Since there are two sets of windings wound on the stator of bearingless motor, two sets of power circuit hardware and controller are required. In the case of most conventional structures, each terminal controller calculate references by themselves and transmits a torque/positon interactively. However, the latency issues of data delivery latency affecting the decoupling between the air-gap flux.The paper proposed the structure for a torque/positon hybrid control through network, torque/positon is transmitted from each terminal controller to a central controller. Then the central controller calculates references that are feedback to the terminal. The delay time is eliminated. In the paper, the hybrid control of bearingless induction motor is realized with the digital system based on the TMS320F2812.
Attitude Coordination Control of Spacecraft Formation
Authors: Liu Man Guo , Zhang Ke
Published: December 2012

In this paper, we study adaptive attitude synchronization of spacecraft formation with switching topology. By introducing a novel adaptive control architecture and by transforming the attitude dynamics into Euler-Lagrange form, decentralized controllers are developed, which allow for parametric uncertainties and unknown external disturbances. Based upon graph theory and Lyapunov stability theory, rigid mathematical analysis on system stability is provided. A distinctive feature of this work is to address the adaptive attitude synchronization with general directed information flow. It is shown that arbitrary desired constant relative orientations within the group or with respect to any external references can be attained. Simulation results are provided to demonstrate the effectiveness of the obtained results.
An Examination of the Traits and Genesis of Chaohu Stone, East China
Authors: Li Feng , Wu Li , Wang Xin Yuan , Zhu Cheng , Li Su Yuan
Published: December 2012

Chaohu Stone is a distinct geological tourism resource, and its morphological diversity is shaped by unique local geological environments. However, the dedicated and systematic research is insufficient currently. Starting with regional tectonic characters and environmental conditions, this paper examines the distribution, traits, genesis and classification of Chaohu Stone. Results show that Chaohu Stone mainly includes carbonate rocks formed during the Carboniferous, Permian and Triassic periods. During long geological processes, the rocks have been altered by various external forces such as weathering, leaching, denudation and corrosion, etc., to produce various natural art forms with distinctive styles and shapes. Its morphological variations, eerie veins, rich fossils, unique nodules and smooth porosity differentiate the Chaohu Stone from other ornamental stones. Although Chaohu Stone has wide distribution, rich varieties, many genesis types and centuries of exploration, there is low degree of survey evaluation and genesis study, resulting in damage and squandering of this valuable wealth. Hence, we must highlight managements and protective exploitations of Chaohu Stone, particularly strengthening geological survey and genesis mechanism examination.
Development of Non-Contact Switch Controller of Roller Drive Motor
Authors: Yao Yao , Jiang Bao Liang
Published: December 2012

This paper is about using the latest PIC16F876 MCU and PIC16F877 produced by MIROCHIP from United States to realize the roller drive motor in timed accurate turn, reverse, braking and monitoring feedback control through modular design method.
Quantized Output-Feedback Control for a Class of Discrete-Time Nonlinear NCSs with Time Delays and Packet Dropouts
Authors: Huang Wen Ling , Wan Xiong Bo , Fang Hua Jing
Published: December 2012

A new networked control system is modeled, which has global Lipschitz nonlinearity and network-induced uncertainty including time delay, packet dropout and quantization simultaneously. Then, a class of mode-dependent nonlinear controller is designed, which can effectively eliminate the effects of the uncertainty and ensure the stochastic stability of the controlled system. Furthermore, a linear matrix inequality (LMI) is established and proved, which is a sufficient condition for the existence of the desired controller. According to the LMI, the controller can be explicitly given. Finally, an illustrative example is given to show the validity and practicability.
The Intelligent Quality Control Technology System Based on the Integration Methods of SPC and EPC
Authors: Jiang Zhong Qiu
Published: December 2012

SPC (statistical process control) and EPC (engineering process control) is the scientific methods of quality quality control and quality improvement. It is the difficult problems of quality control process for network manufacturing enterprise how to effectively solve the dynamic quality fluctuation monitoring and the fluctuation abnormal diagnostic analysis and timely process adjustments, this paper designs the intelligent quality control mode and function system architecture, the modes expatiates quality management network based on quality control network of the workshop level and enterprise class network, and researches the integration applications of statistical process control and enterprise ERP quality system, and applies J2EE technology to achieve the system organic combination of design and development.
Influence of Guide Vanes' Angle on Flow Fields of Cylinder Cage Powder Classifier
Authors: Jiang Da Zhi , Han Jing
Published: December 2012

To research guide vanes' influences on flow fields of cylinder cage powder classifier at different angles, a study of guide vanes under 3 different angles is therefore undertaken examining air flow behavior. The investigation of these flow field characteristics made use of the computational fluid dynamics (CFD) to simulate the air flow in the classifier. The results indicate that smaller angles of guide vanes can increase velocity but damage the stability of flow fields, and that those larger angles will reduce the velocity.
A Side Slope Remote Monitoring System Based on Wireless Sensor Networks
Authors: Wu Jun , Sun Tao , Yang Xiang Guo
Published: December 2012

To solve the problems in the slope monitoring that needs man on scene to get real time monitoring data, this paper designs a remote monitoring system based on wireless sensor networks for side slope. With this system, users can get the quasi-real time monitoring data far from monitoring spot. This project adopts the wireless sensor networks technology, and the design comprises four modules according to the system function. The frame of the system, the design and function of each module are introduced in this paper. It proves that the system is feasible by experimental results, and the design has its practical value.
Photography Measurement Sensor Application Present Situation and Development Trend
Authors: Feng Yan Ping , Yang Li Bing , Chen Yan Hong , Li Wei Guo , Liu Ya Li
Published: December 2012

This paper introduced the principle, system composition, characteristics and main technical parameters and of ADS40, three line array CCD digital sensor, which was developed by the Swiss Corporation and the German Aerospace Center DLR jointly and have been put on the market. Then the application status of ADS40 in China was reviewed and the development future of digital sensor was prospected.
Snowball Effect Time Synchronization Based on Energy Optimization for Wireless Sensor Networks
Authors: Yang Gang , Liang Ming Fei , Xu Tian Tian
Published: December 2012

In large scale of WSNs (wireless sensor networks), a centralized algorithm is not suitable for WSNs. Distributed algorithm has the obvious advantage over traditional time synchronization algorithm. The paper proposes a distributed time synchronization algorithm for WSNs, called SNOWBALL effect time synchronization. In the algorithm, a node needs only to communicate with its neighbor node, synchronizing itself clock based on the neighbor nodes information. The algorithm is a continuous synchronization process. The network will reach balance and clock consistency after repeated algorithm iterations. In the algorithm, we achieve network energy optimization by reducing unnecessary message exchange.
The Application of Wireless Sensor Network in Agriculture Information Collection
Authors: Song Ge Lian , Wang Mao Hua , Ying Xiao , Yang Rui , Zhang Bin Yun
Published: December 2012

It is an important foundation to precision agriculture to collect the influence information of the crop quickly and effectively. The traditional laboratory manual collect and analysis method has been difficult to meet the timeliness requirements of agriculture information collection, through the wireless sensor network to carry on the agriculture information collection is a good way to solve the problem. In this paper, we propose a farmland data acquisition system based on the Wireless Sensor Network technology. The system establishes the whole crop monitoring system through exerting GPRS network and combining integrated circuits, sensors and GPRS communication modules on data transmission. And by using the internet, GPRS and field monitoring communication, the data center can produce a complete record, the curve showing and query of field data, meanwhile it can detect equipment remotely.
Efficient Power Control and Clustering Method Based on Hybrid Clonal Genetic Algorithm in Wireless Sensor Networks
Authors: Zhu Xiang Xian , Lu Su Feng
Published: December 2012

Wireless sensor networks (WSNs) lifetime for large-scale surveillance systems is defined as the time span that all targets can be covered. How to manage the combination of the sensor nodes efficiently to prolong the whole network’s lifetime while insuring the network reliability, it is one of the most important problems to research in WSNs. An effective optimization framework is then proposed, where genetic algorithm and clonal selection algorithm are hybridized to enhance the searching ability. Our goal can be described as minimizing the number of active nodes and the scheduling cost, thus reducing the overall energy consumption to prolong the whole network’s lifetime with certain coverage rate insured. We compare the proposed algorithm with different clustering methods used in the WSNs. The simulation results show that the proposed algorithm has higher efficiency and can achieve better network lifetime and data delivery at the base station.
Survey of Seafloor Targets with Varied Sizes by Multi Beam Sonar in Different Depth Water
Authors: Wu Li Hong , Xu Wen Hai , Wang Wenbo
Published: December 2012

Multi beam sonar needs complex data processing lying on human intervention to get accurate depth contour and low accuracy in sonar image which prevent its popular use in surveying seafloor targets. To survey seafloor target in different depth by GeoSwath, this article presents survey parameter setting method such as ping length, ship velocity to increase points over targets, navigation line parallel to heading of target during survey, adopting along track filter to depth data processing and using TVG control over amplitude data to get accurate depth grid and sonar image of seafloor target. Finally, the way is used to measure the artificial object in harbor and two ship wrecks at sea, which improve GeoSwath survey capability with compound detection and is helpful for make precise map for waterway. Also this work is helpful to achieve detecting seafloor objects fast, accurately, effectively in underwater large scale area during salvation and rescue task.
An Adaptive Error Control Scheme in Wireless Sensor Networks Based on LQI
Authors: Zhang Jie , Yao Wu Jun , Yang Hai Bin
Published: December 2012

Aiming at the character of high bit error rate and energy constraints on WSN, this paper proposed an adaptive error control scheme based on link quality indicator(LQI). The PHY specification of IEEE802.15.4 provided accurate measurement of channel quality for WSN, according to the quantitative relationship between LQI and bit error rate, this paper divided the channel quality into eight levels non-uniformly, furthermore, eight different BCH code were chosen correspondingly. The motes choose optimal BCH code as its error correction scheme in real time. Experimental results show the scheme is high in energy efficiency, meanwhile, drops the error probability effectively.
An Ant Colony Optimization Approach to Power Allocation in Wireless Sensor Networks
Authors: Liu Xiang Yang , Wang Da , Pan Jin
Published: December 2012

The ant colony optimization algorithm is good at solving multidimensional optimization problem. The allocation of power resource of a node in wireless sensor networks should make the detection performance of the whole network maximum, which is complex due to the detection probability of the whole system cannot be expressed explicitly. Therefore, continuous ant colony system (CACS) is adopted to optimize the allocation of each node’s power between sensing and communications. The results show that it can lead to a good power allocation. At the same time, the scheme that all sensor nodes have identical power assignment can achieve nearly the same detection performance as compared that achieved by the best scheme searched by CACS. As a result, particu-larly for a large number of sensors, an identical power allocation scheme for each node can be employed to achieve nearly the best detection performance.
Constructing a Data Mining Sensor to Classify Tw-DRGs Medical Specialties
Authors: Huang Yuan Huei , Chang Che Wei
Published: December 2012

This work applies decision tree analysis to construct a classification sensor for Taiwan’s diagnosis related groups (Tw-DRGs) of medical specialties. Inpatient expenses of 2009 in a national health insurance database were transformed to the SQL database analytic software for analysis and classification. DRG code is selected by the principal diagnosis code with the operating room procedures code. Selecting the combinations in accordance with National Health Insurance inpatient diagnostic related groups TW-DRG Classification Manual, resulting in repeated DRG codes. The study analyzes three medical classifications of Tw-DRGs implementations on 2009 to solve the DRG code appropriate attribution issues. Appropriateness and accuracy of the DRG code is an important influence to the medical payments. The results found that decision tree can effectively and quickly establish the DRG classification process.
A MAP Selection Scheme Based on Multi-Attribute Decision Making in Hierarchical MIPv6
Authors: Xi Bing , Wang Hong Yu , Pei Er Rong
Published: December 2012

Hierarchical Mobile IPv6 (HMIPv6) reduces the amount of signaling overhead between the Mobile Node (MN) and its Correspondent Node (CN) by introducing a mobility anchor point (MAP). However, handling both intra-domain handovers and tunneling traffic for MNs may cause a single point overload. In this paper, we present a MAP (Mobile Anchor Point) selection scheme based on Multi-attribute Decision Making (MADM). In our proposed scheme, the Pref and Dist in MAP option message are used as two attributes of MAP, and MN can set different weights for these two attributes according its velocity. After testing, it indicates this scheme can handle high level MAP overload and achieve better communication performance.
Plastic Deformation and Fracture Initiation Typology Analysis under a Triaxial Tensile State of Stress Using the Quantitative Assessment of Microstructural Changes
Authors: Safta Voicu Ioan , Safta Voicu Ionel
Published: December 2012

The paper approaches the influence problems, due to increase in plastic deformation and fracture initiation, upon the multi-axial stress state. The experiments are based on determining the geometric changes of stress concentrators and the increase of granulation anisotropy of unalloyed steel related to the plastic deformation. In order to evince the changes in the concentrators shape, at high levels of deformation, an average parameter of shape was introduced. The 3D Complex representations, based on measurements have indicated the dependence of longitudinal specific deformations for the deformation degree, as well as sectional position in the area under measurement. The variation functions of the longitudinal specific deformation of the medium average shape parameter showed an opposed linear dependence at the top of the tension concentrator relatively to the tested specimen axis. Taking into consideration the average parameter of shape, the experimental correlations were more conclusive. Evaluating the microstructural state of stress concentrators, the deformations have revealed distinct fracture typologies, influenced by the specific state of deformation. By synthesizing the information regarding the fracture initiation, an typological diagram of fracture initiation TDI was elaborated. In this diagram, representing the cross section of the specimens, for different values of the stress concentrator factor, six quasi-quantitative zones have been analyzed.
A Study on the Development of Micro Metal Gear with Outer Diameter of 500um Using MIM Process
Authors: Heo Young Moo , Shin Kwang Ho , Kim Jong Deok
Published: December 2012

At present there are many studies that are carried out to develop micro parts. A micro drive unit assembled with several micro movable parts is needed to industrialize the functional micro parts such as micro pump, micro-chip, micro motor, and micro gear. In this study, a powder injection molding process was used in making micro metal gear with outer diameter of 500um. To make micro metal parts, it necessary to create micro shape cavities and cores for the filling of feedstocks. To make micro shapes or patterns, there are several methods to choose such as LIGA, laser machining, micro etching, and micro milling. But these micro methods are expensive and need some special facilities to fabricate. So in this study, conventional machining methods were tested to make micro gear cavity shapes. The preliminary studies were conducted to evaluate the filling of cavity and the EDM machining. Finally micro gear with outer diameter of 500um was injection molded, de-binded, and sintered. Some incomplete fillings occurred at the end of filling gear teeth using 17-4PH 3F feedstock. The final sintered micro metal gear showed about 434um of outer diameter.
Impact of Wind Generation in the Generation Reliability Assessment
Authors: Rios Mario Alberto , Garzón Alexandra Moreno
Published: December 2012

Due to its intermittent behavior wind speed supposes a WTG generating model of more than two states. Uncertainty in wind power implies a non-constant power output; hence, there are a risk of loss of capacity and loads. This paper proposes a multistate model of wind generating unit, to include the effect of wind variability besides conventional generators in HL1 reliability evaluation. Through non-sequential Monte Carlo simulations it is shown that system performance decreases as a result of wind power inclusion, and reliability indices validate it. Markov process is used to design the multistate model of wind generating unit. Historical data wind velocity for sixteen past years is gathered and used for modeling, and as case study a demand data in north of Colombia is selected.