bluuebunny/crossref_metadata_2025 huggingface dataset:
Electromechanical Actuator Control System Development Using Rapid Prototyping Method
Authors: Zhang Jia Bao
Published: September 2013

In order to rapidly develop the control system of the Electromechanical Actuator (EMA), the DSP development platform is established using rapid prototyping method based on the MATLAB software, and all the models is configured and researched. First, the DSP development platform structure in the environment of MATLAB is mainly presented. And the operation principle has been showed. Then, the EMA control circuit board schematic diagram is necessarily introduced, which one is for the developer to conveniently configure the system model. Finally, the developer reasonably configures the control system models used in the Simulink library and constitutes them to speed closed loop control system of the EMA. The EMA control system code will be compiled and debugged rapidly through this platform. The executed program will automatically download into the DSP processor. And the result of debugging would be sent to the CAN bus receiver. For generally speaking, the difficulty of EMA control system code development method is reduced and the development cycle is shortened using this rapid prototyping method. And this system development method is fast and effective.
Synchronization of a New Fractional Order Hyperchaotic System with Activation Feedback Control
Authors: Zhang Wei Wei , Chen Ding Yuan
Published: September 2013

In the current paper, a new fractional order hyperchaotic system is discussed. Using the activation feedback control, the synchronization of a new fractional order hyperchaotic system is implemented based on the stability theory of fractional order systems. Numerical simulations are demonstrated the effectiveness.
Design and Simulation of the Self-Tune Fuzzy Logic PID Controller for VAV Air Condition System
Authors: Zhang Gui Chen
Published: September 2013

Base on the Fuzzy Logic(FL) control theorem, the Self-tune FL PID controller is designed in which the base rules of operator experience were combined. In MATLAB simulation, when system uses the same parameters, the Self-tune FL PID controller’s over-adjust decreases by 17% compared to the conventional PID controller. That applying Self-tune FL PID controller to control the damper’s position in VAV system is able to achieve the steady and less energy consumption system.
Data-Based Research on Predictive Control of Multiple Mismatched Model Parameters
Authors: He Da Kuo , Xin Jun Qi , Yuan Wen Long , Yuan Qing Yun
Published: September 2013

The basis of the paper is that there are already some methods to accurately evaluate, test and diagnose the performance of the model predictive controller. And the result shows the reason of a bad performance of control system is because of model mismatch. There are much more complexity and variety in the problem of multiple mismatched parameters than single mismatched parameter, so we need consider more factors about it on the basis of the solution of single mismatched parameter. We propose a way of adjusting model parameters based on fuzzy rules when there are more than one mismatched parameters. The method is to adjust the step-size of parameters and get the adjustment rules on the basis of the changes of maximum overshoot, rising time and settling time. The last, verifying the method is effective by experiments.
Finite-Time Chaos Control of Lorenz Chaotic System Based on the Passive Control Teachnique
Authors: Liu Feng
Published: September 2013

Finite-time chaos control of Lorenz chaotic system applying the passive control method is investigated in this paper. Based on the finite-time stability theory and the passive control technique, the passive controller are proposed to realize finite-time chaos control of Lorenz chaotic system. The controller is robust to noise. Both theoretical and numerical simulations show the effectiveness of the proposed method.
Application of Extenics Theory to Accuracy Evaluation of Machining Center
Authors: Liu Chen , Bu Xiang Li
Published: September 2013

The matter-element model for the accuracy evaluation of the machining center is established based on extenics theory, the accuracy evaluation indexes of machining cente are made of multiple elements. The relational degree is calculated by introducing the relational function in the extension set theory, and the weights of evaluation indexes are defined with AHP (the analytic hierarchy process), so the awaiting evaluation machining center is determined though the accuracy grade. A type of machining center as an example is studied the practical application of the proposed method, the result is reasonable and shows that the method possesses a certain practicability.
Strapdown Optical Seeker Guidance Instructions Extraction and System Stability
Authors: Zhang Yue
Published: September 2013

In order to realize the guidance and control of the flight system, we focused on the study of different guidance instructions extraction methods and system stability control problems with respect to the characteristics of full-strapdown optical imaging seeker. First, we established the model of strapdown optical imaging seeker and introduced the definition of scale factor and the theoretical compute formula. Then the full field of view accuracy of full-strapdown optical imaging seeker was gained through the experiment and the validity of the scale factor definition has been tested and verified. Finally, we analyzed the system stabilities of different guidance instructions extraction methods. The results showed that if we applied the line of sight angular rate (LOS angular rate) to the system, the scale factor error was 5% when the free-running frequency of the overload autopilot was 20rad/s, and the scale factor error was 8.4% when the free-running frequency was 10rad/s. And if we applied the line of sight angle (LOS angle) to the system, the scale factor error was 33.3%, irrelevant to the free-running frequency. This analysis laid a foundation of guidance application..
A New PLS and Bayesian Classification Based On-Line Outlier Detection Method
Authors: Wu Tie Bin , Cheng Yun , Hu Zhi Kun , Xie Wen Ping , Liu Yun Lian
Published: September 2013

Considering that multivariate data is difficult to detect, this paper propose an PLS and Bayesian theory based on-line outlier detection method. Firstly, it figures out the Q-statistics by PLS(partial least squares analysis), then classify Q statistics with Bayesian classification method and decide whether or not the sample data is normal. We employ UCI database to verify the method, the simulation results show that, compared to traditional PCA based method, it has lower ratio of error judgement, and is more effective in detecting outliers and identifying the change of process states.
Research on Pantograph Active Control Strategy for Reducing the Pantograph–Catenary Wear
Authors: Li Chuan Xi , Dong Lin
Published: September 2013

In order to reduce the wear of pantograph and catenary, prolong working time of the friction pair, and ensure the quality of current collection, a new type of pantograph active control strategy is designed. The strategy is based on the theory of friction and wears with electric current, control theory and micro-control technology, and is characterized by the dynamic wear test of catenary and the contact force control. The results show that the wear of the pantograph and catenary can be significantly reduced, the contact force fluctuation also can be effectively controlled, and the quality of the current collection of pantograph-catenary can be improved, while the active control strategy is applied.
Control Strategy of PMSG in Variable Speed Wind Power System
Authors: Li Hai Long
Published: September 2013

Control strategy of permanent magnet synchronous generator (PMSG) in variable speed wind power system has been design in this paper. The decoupling control can be realized by PWM converter with the field oriented strategy, and a novel adjusted method is discussed with excitation component compensation. Power characters and model of wind turbine are studied, and the simple maximum power point tracking (MPPT) algorithm is executed. Moreover, the complete control strategy is expressed considering the model limit of PMSG. The design adopted can feasible realize the predominant control within the permissible wind speed. The analysis and investigation results all have been confirmed that the excellent dynamic states and steady states performances of the control strategy.
A Primary Design of the General Scheme on Modular Vertical Lathe
Authors: Liu Xiao Peng , Deng Yuan Chao
Published: September 2013

According to the needs of the scheme design of on the modular vertical lathe, the requirements of the customers and the tasks of the design are analyzed. The selection of the main technical parameters in the primary scheme design on the vertical lathe is specified. Take the main transmission system as an example; the process of the general design scheme is described.
A Method of Line Structured Light Vision System Calibration Based on Stereo Vision
Authors: Liu Yu Bao , Liu Bin , Lin Jun Yi
Published: September 2013

It is a difficult task to get enough numbers of highly accurate control points for projector calibration in line structured light vision system. A new projector calibration method based on binocular stereo vision is proposed in this paper. Two cameras calibration can be done usingtraditional camera calibration method and they composed a binocular stereo vision. In projector calibration procedure, a planar template was located at several different positions in front of the stereo vision system. Two cameras captured the stripe images in each position simultaneously. Every center points of the laser stripe can be used as control points of the projector plane. The 3D coordinate of the stripe center points can be obtained through binocular stereo vision principle easily. So the light plane can be calculated quickly. Experiments were carried out and the result shows that the proposed method is flexible and stable.
Robust Adaptive Control for Robotic Manipulators Based on RBFNN
Authors: Xing Bang Sheng , Zhang Wen Hui
Published: September 2013

The rigid robotic manipulators is used in the mining industry more and more widely. An adaptive robust control algorithm of robotic manipulators based on radial basis function neural network (RBFNN) is proposed by the paper. Neural network controller is used to adaptive learn and compensate the unknown system, approach errors as disturbance are eliminated by robust controller. The weight adaptive laws on-line based on Lyapunov theory is designed. The robust controller was proposed based on H theory. Above these assured the stability of the whole system, and L2 gain also was less than the index. This control scheme possesses great control accuracy and dynamic function. The simulation results show that the presented neural network control algorithm is effective.
Development of Quality Detecting System for Micro Holes by ECM Based on Machine Vision Technology
Authors: Liu Yong , Zhu Lin Sen , Xiong Qiu Ju
Published: September 2013

A rapid quality detection system for micro hole fabricated by electrochemical machining (ECM) is proposed by studying on the optical features of micro hole. The edge of micro hole is detected exactly with the digital image processing techniques, such as, the middle value filter, the threshold value transformation, and so on. The least square circle fit arithmetic and the new roundness measurement algorithm are synthetically used in the processing of geometric feature recognition of micro holes. The practical results prove that the method with exact conclusion and high precision can satisfy the quality inspection requirement of micro holes fabricated by ECM.
Fuzzy Control for Underactuated Manipulator
Authors: Xia Qi Xiao , Yu Yue Qing , Liu Qing Bo
Published: September 2013

Control of an underactuated manipulator by fuzzy control method is investigated in this paper. The joint angular errors are directly feedbacked to the inputs of the fuzzy system. The MIMO fuzzy controller is decoupled into sub SISO systems for simplification of the design of the system. Numerical simulation for the position control of a planar was presented for verification of the proposed method.
Study on the Design of Cantilever Crane in Wind Turbine
Authors: Geng Gui Hong , Guo Sheng Wei , Zhang Xu Jin
Published: September 2013

A small and light lifting equipment used to install and overhaul in wind turbine is introduced. Thereinto, load: 500 kg, lifting height: 70 m, lifting speed: 8-12 m/min, slewing radius: 2 m. The equipment and auxiliary materials are shipped to the cabin through the rotation of the crane jib. And the equipment can be also used to assembly plants in mechanical processing and transport materials in warehouse. According to the design and calculation of slewing arms structure, the equipment can meet the requirements of domestic 1.5 MW wind turbine.
A New Automatic Focusing Algorithm and its Application on Vision Measuring Machine
Authors: Zou Hua Dong , Wang Hao Xiang
Published: September 2013

The way to realize the automatic focusing rapidly and efficiently is a focus in some automatic optical inspection case. The key problem is how to select a suitable focusing evaluation function and design an effective auto-focusing algorithm. In this paper, based on comparing some well-known focusing evaluation functions, a new automatic focusing algorithm was presented. It used two steps to do the search. At the first step, it searched a large region quickly just to get the approximate focusing position, the next step was to do precise search in a small area in order to get the exact focusing position. This new algorithm performed well on the vision measuring machine and could focus rapidly and exactly.
Design and Topological Analysis of a New Manual Operation Sugarcane Loader with Metamorphic Function
Authors: Gao De Zhong , Cai Gan Wei , Shi Hui , Pan Yu Chen
Published: September 2013

Sugarcane loader is a kind of agricultural machinery for sugarcane transport. Traditional sugarcane loaders are mostly hydraulic type powered by diesel engine, which is difficult to promote in small producing unit, because of its big size and high maintenance costs. A manual operation sugarcane loader with metamorphic function invented by the research of metamorphic mechanism applied to sugarcane loaders can change its topological structures according to different needs of work tasks. The grabbing and raising task of sugarcane can be done by a single operator action. This paper introduces the source-metamorphic mechanism of the sugarcane loader, as well as the metamorphic ways. Use the topological graphs to describe the topology changes of different work tasks and to analysis the principles and characteristics of configuration.
Modelling and Simulation of Forward Kinematics for Planar 3-DOF Parallel Robot Based on Simulink
Authors: Dang Xiao Zheng , Zhou Liang Sheng , Liao Ling Ping , Liang Dong
Published: September 2013

Parallel robots are widely used in the machinery industry. In this paper, a planar 3-RRR parallel robot is researched. The forward kinematics mathematical model is established for this kind of mechanism. On the basis of it, a relevant simulation is carried out through MATLAB/Simulink. Thus, the motion rules and stress state for all parts of the mechanism are described vividly The simulation results show that this method is much more effective and efficient when the simulation is implemented for a certain machine system. Meanwhile, it provides a theoretical foundation and a better analytical approach of simulation for the design and analysis of complex multi-linkage mechanisms in the future.
The Design of Stereo Vision Autonomic Navigation Robot Based on SOC
Authors: Wang Hai Feng , Long Xu Ming , Cui Xiao Lu
Published: September 2013

The design of an autonomous navigation robot is introduced. The robot system is used a SOC chip, which is used SPARC V8 architecture supporting the DSP instruction, integrated a hardware multiplier, a five level water treatment, a variety of bus and peripherals. The robot system includes stereo vision module, distance measurement module and motor drive module. It can achieve some functions such as real-time signal processing, target search, multi-window tracking and communication.
Ferrying Performance Analysis of a New Type All-Terrain Tracked Water Carrier
Authors: Xu Cong Qi , Li Tian Mei , Jia Gui Zhi , Gao Rui Lin
Published: September 2013

A new type all-terrain tracked water carrier is customized for water transportation with complicated terrains such as marsh, lake or dessert etc. The vehicle is designed based on combination of all-terrain tracked chassis and water storage tank. The tracked chassis provides the ferrying possibility, while tank structure and the thickness of heat-insulating layer is the key for successful ferrying. To further research the ferrying characteristics, the floatability and initial stability are analyzed. Then to optimize design of the vehicle, mathematic model of buoyancy center, reserve buoyancy and initial stability is established. At last, the field ferrying test is done. The results show the vehicle can ferry successfully in watered areas with a speed of 5.19km/h when fully loaded.
Research on Precise Positioning Technology of Mine Locomotive Unmanned Systems
Authors: Ge Bin , Zhang Shao Xin
Published: September 2013

The research programs and positioning methods of precise positioning technology of the Mine locomotive unmanned systems were discussed in this paper, It implements the positioning of three-dimensional spatial coordinates, and analyses the experiment of positioning calculation and positioning deviation. Experimental results show that the new technique and method can improve precision positioning accuracy above 5%, and provide reliable security protection for the Mine locomotive unmanned systems.
An Optimizing Evaluation of Estimation Algorithm about the Fault Detection and Exclusion in the WAAS
Authors: Zhao Rui Bin , Li Rui , Huang Zhi Gang , Shao Bo
Published: September 2013

The fault detection and exclusion (FDE) algorithm played a very important role in the Wide Area Augmentation System (WAAS). When the WAAS was not available, the FDE algorithm could provide the monitored information for the navigation position solution. It could autonomously provide the integrity monitoring for the position solution, which it had a capability to detect and prevent a positioning failure that affected the navigation. An optimizing evaluation of estimation method was employed in detecting and isolating the outlying measurements for the satellite ephemeris error and the satellite clock error, which could assess the integrity risk in the WAAS. Therefore this algorithm could provide more precise integrity parameters of the satellite ephemeris error and clock error, which the method is more suitable at the master station for engineering application about the satellite.
The Research on Overpass Water Depth Monitoring Sandbox Based on Internet of Things
Authors: Shi Heng Hua , Chen Tao , Wang Guo Dong , Liu Yong
Published: September 2013

Overpass is the major transportation facilities in the city, and occupies a very important position in the urban road network. Rainfall can likely cause surface water under the concave overpass. We establish a concave overpass wanter depth monitoring sandbox based on Internet of Things, and simulate the concave overpass water depth with different rainfall level. Simulation results show that the concave overpass wanter depth monitoring sandbox can control the overpass water depth with controlling drainage opening time by adjusting the threshold value, and simulate the physical environment very well. This can interchange for the city flood control and drainage design, checking provide reference and basis.
Evaluation of Equipment Comfort in Data Centers by Fuzzy Logic
Authors: Yu Chang Geng , Liu Gui Xiong
Published: September 2013

Evaluation of equipment comfort is the premise to ensure the equipment operating normally and the computer room energy-saving. Based on fuzzy logic, We present a equipment comfort evaluation method model FDEC which gives a mathematical description and a way to implementation and the scientific evaluation in Data center, equipment comfort is analyzed for three different perspectives: temperature, humidity and ventilation in the room. Evaluation of equipment comfort problem solving algorithm is designed.
Research on Highway Early Age Freezing Information Collection System
Authors: Xie Li , Zhu Bao Lin , Wang Tong , Bian Li
Published: September 2013

This article develops a management platform of Highway Early Age Freezing Information Collection System, which is based on the full investigation and analysis of Chinese geographical conditions, climatic conditions and road conditions, and aimed at meteorological and environmental characteristics while freezing disaster occurs. The system can effectively limit freezing development, thus prevent occurrence of a large area freezing disaster.
A Depth Measurement Method Using Two Structured Light Binary Patterns
Authors: Zhang Wan Zhen , Yang Peng Cheng , Guo Zi Ming , Ju Guo Hao , Lin Bin
Published: September 2013

An improved tripolar pulse width modulation method has been proposed in this paper. According to the linear effect of optical system defocusing, the three-gray-level structured light pattern can be split into two binary ones. With the composite image, the same measurement result as the tripolar method is obtained. Simulation result shows that, under three-step phase shifting method, the error of phase retrieval is greatly eliminated. Thus, the proposed method can achieve better depth reconstruction results than PWM method. Furthermore, both simulation and experimental results show that the measurement range of this method is effectively extended.
The Principle and Calibration of the Third Gear Flow-Meter
Authors: Zhang Jun , Niu Meng Meng , Tang Hong Mei , Li Xian Hua , Tang Cun Ren
Published: September 2013

At present, the domestic development of the gear flow-meter is far behind the developed countries, especially in the micro gear flow-meter. This paper proposes a typical structure named the third gear flow-meter. The structural characteristics and working principle of the third gear flow-meter was introduced in detail, the prototype of the third gear flow-meter was designed and processed, and the calibration tests and pressure experiments of the third gear flow-meter prototype was made at last. We can draw that the three gear flow-meter can be used in hydraulic system pressure range is less than 25Mpa, the flow rate was 0.15~0.2m3/h can meet the high requirements of the stability of measurement, and the measurement accuracy in the whole flow range is 0.2 class. This article provides a reliable experimental data for the design of the micro gear flow-meter.
Design on Small Multi-Function Chassis Manipulator Device
Authors: Lv Xiao Rong , Lv Xiao Lian , Zhang Li Hua
Published: September 2013

In view of the present agricultural machinery manipulation device of large space occupation, low control precision. In this paper, design a set of steel rope control small multi-function chassis motion manipulation device. By virtual prototype technology, completed the design of the whole structure of controlling device and key components of virtual design.
A Novel Integrated Portable Elasticity Measurement System
Authors: Chang Hsing Cheng , Chiang Chung Chien , Hung San Shan , Lin Shyan Lung , Liao Shu Chun , Chen Chang Hsiung
Published: September 2013

A low cost novel integrated portable elasticity measurement system is developed by using strain gauges and photoconductive sensors on a coaxial movement mechanism for processing signal of force and displacement synchronously. Real-time acquisition data are averaged to reduce transmission delay for assuring signal taken exactly and synchronously. Switching circuit modules connected to the multiplexer are designed for processing nonlinear sensing data using a piecewise linear technology. An experimental study of force, displacement and elasticity is undertaken to illustrate the adjustment operation of tapping keys in alto saxophones. Experimental results show that the resolution and operation range of displacement and force are 0.1 mm in the range of 0 to 40 mm and 10 g in the range of 0 to 1000 g, respectively. The average error of the elasticity in real-time measurement is 2.07 %. The application of tapping keys adjustment using the system are outlined and discussed in three-zone elasticity models.
An Optical Centrifugal-and-Pneumatic Controlled Microfluidic System for Sensing Real-Time Biochemical Reactions
Authors: Chang Hsing Cheng , Chen Ya Hui , Lin Shyan Lung , Hung San Shan
Published: September 2013

An optical real-time pneumatic-and-centrifugal controlled microfluidic detection system for dynamic information acquisition is developed based on the quasi-stationary imaging technique. The programmable airflow applied on the centrifugal microstructures for improving efficiency in samples separation. The dynamic characteristic of a loaded disc is stable with vibrating under 0.3 mm at a speed of 1000 rpm by applying 3 bar-induced pneumatic forces on a 12 cm-diameter disc. A conversion model for converting RGB images into CIEL*a*b*color space have been used to enhance the inspection images. A linear relationship between threshold frequency and sample density is 167 rpm/g/cm3. The pressures between 0.1 and 0.5 bars are applied to bias microflow from 15° to 80°. The conduction angles between 30° and 90° have better pneumatic control. The control efficiency observed up to 89% and the largest microflow biased angle reached 80°. The pneumatic force dominates microfluidic behaviors when the force is greater than 10 times the centrifugal force. A sequential of triple-reservoir tests has been verified by analyzing enhanced optical images in separation using arranged acid-base indicators for pH reactions.
A STEP-NC Compatible on-Machine Measurement System with Automated Correlation of Inspection Data
Authors: Lei Pei , Zheng Lian Yu
Published: September 2013

On-machine measurement (OMM) is an important part of closed-loop manufacturing (CLM) system. How to achieve real-time measurement operation and measurement result integration claimed by CLM is a major issue that concerns software and hardware vendors. This paper proposed a STEP-NC compatible on-machine measurement system that was compatible with interoperable data model. In the beginning, information model of the system was proposed referring to current data model standards supporting closed-loop manufacturing. After that, a hierarchical process planning approach was present to plan the OMM process. Object-oriented macro programs were utilized to post process the planned inspection information and ensure the correct measuring result correlation. Besides, inspection items and measurement points were uniformly and uniquely identified to ensure the accurate and reliable associations of measurement results with the design model. At last, a STEP-NC compatible on-machine measurement prototype system was developed based on CATIA, and the validity and practicality of the proposed on-machine measurement system was demonstrated with an aeronautic test part.
Design of Remote Control System for Smart Home Based on Z-Wave
Authors: Gao Chuang , Jiang Meng Yi , Zhang Ni , Huang Fu Lin , Li Yan Lin
Published: September 2013

A remote control system for smart home is designed based on Z-wave, which is divided into two components: controller and receiver. In the controller design, the key signals are scanned by SCM P89LPC9408 to generate and transmit different control commands to Z-wave module, and then the relative commands are packed by Z-wave protocol and transmitted from a wireless network, LCD module is used to display the relative information such as time and temperature. In the receiver design, the Z-wave signal is received by receive module, and the transmission commands are demodulated and transmitted to SCM P89LPC938 to realize the relative functions. The results show that this system has a certain application value for smart home design.
A New Microprocessor Protection Scheme Based on Digital Signal Processor
Authors: Lian Jin Hua
Published: September 2013

Based on the demand of power department, a protection & monitoring device for the power distribution line is studied. The device using DSP as the core technology is a new industrial control unit, which adopts the of dual CPU of DSP+DSP and consists of chip selection unit, A/D conversion, data storage, watchdog circuit, press key, switch quantity detection, control output, communication, display and clock etc. The software system includes two parts: tracking software and protection software. The device ensures the high reliability and feasibility, at same time incarnates the advantage of microprocessor protection by intelligent designs.
Research on Grid-Connected Photovoltaic Generation System Based on Novel MPPT
Authors: Wu Hong Mei , Cao Chu
Published: September 2013

With the rapid economic development and the increasing energy demand, solar energy as an important part of the renewable energy is taking more and more attention. In this paper, photovoltaic maximum power control strategies have been studied in this context, and MPPT method based on fuzzy variable step is proposed, it makes up the inadequate of traditional methods like perturbation observation method, incremental conductance method, intermittent scanning method and the constant voltage method. Build photovoltaic physics experiment platform, preparation of a variable step size control to achieve program, and simulation and experimental verification that the method can fast-track the changes in the weather, achieve MPPT, it has excellent dynamic and steady-state performance.
A Novel Pilot Protection for HVDC Transmission Lines Based on Model Error Function
Authors: Li Dong , Jin Xing Fu
Published: September 2013

In order to solve the problems in existing protection for high voltage direct current (HVDC) transmission lines, such as insufficient sensitivity for main protection and slow operation for backup protection, a novel pilot protection for HVDC transmission lines based on model error function is proposed in this paper. In the principle, through analyzing the fault component networks, external fault is equivalent to a capacitance model, while the internal fault is equivalent to a inductance model. Taking capacitance model as a benchmark, the model error function was defined to describe the degree of consistency between actual fault data and the benchmark. When an external fault occurs, fault data agree with the capacitance model and model error equals zero. When an internal fault occurs, fault data do not agree with the capacitance model and model error does not equal zero. According to this, a protection criterion is constructed. Theoretical analysis and simulation show that the new principle, not affected by transition resistance and line distributed capacitance current, can identify internal faults and external faults reliably and rapidly.
ATP Simulation Hybrid Electrode Capacitor Self-Healing Circuit
Authors: Kong Zhong Hua , Wu Li Gang , Luo Zai Fei
Published: September 2013

In the paper hybrid electrode capacitor self-healing circuit is simulated through ATP. It illustrates the equivalent circuit of self-healing is correct, so self-healing process can be analysised quantitatively. The results are that the smaller is the plasma resistance, the larger is self-healing waveform amplitude, The larger is the experimental capacitor, the longer is self-healing time.
Research on Sewage Treatment by Combined Two-Phase ABR and SBR
Authors: Jing Ling , Wang Xin Xia
Published: September 2013

This paper presents Two-phase Anaerobic Baffled Reactor (TAABR) and sequencing batch reactor (SBR) to remove N, P and COD of Sewage. The influence factors of temperature, volume load and different effects on the TAABR running process running were studied to obtain the optimum operation conditions. The results are as follows: 1. The experiment uses the start method that by shortening HRT to raise the load, after 53 days completes ABR start.2. Suggest the best HRT is 6 h when the craft processes sewage. 3. The temperature has an influence on clean effect of the system, when the temperature descends from 20 °C to 10 °C, system clean rate of average COD descends from 87.1% to 52.4%. 4. TN, TP and COD concentrations of the effluent all reach the level of the national standards for the discharge of GB18918-2002.
AC Excitation and Speed Governing Coordination Control of Impulse Hydroelectric Generating Unit and its Simulation
Authors: Hu Xiao Qian , Liu Wei , Zhang Lian
Published: September 2013

Aiming at the AC excitation control and speed governing of high water-head impulse hydroelectric generating unit, and in order to realize unit optimization adjustment and obtain desirable comprehensive control performance, a variable structure and variable parameter coordination control idea, including designing coordination control module and constructing coordination control mechanism, is proposed. By the management of coordination control module, the dynamic switching between no load operation and grid-connected generation control, and the dynamic matching between AC excitation control and rotational speed control can be realized. Thanks to the dynamic coordination control of AC excitation and hydraulic governing, on the one hand, power regulation is rapid and precise, improving stability of power system; on the other hand, unit nozzle twitching is reduced, decreasing difficulty in speed governing, and realizing maximum efficiency tracking control. The simulation of grid-connected operation shows that: AC excitation and coordination control strategy can make doubly-fed asynchronous generating unit acquire much better control performance than conventional unit.
Dynamic Output Feedback H∞ Controller Design in Multiple-Packet Transmission with Limited Communication
Authors: Wen Dan Li , Deng Huai Yong
Published: September 2013

This paper was concerned with the dynamic output feedback H∞ controller design for Networked Control Systems. Data transmission in multiple-packet was adopted due to the limited communication. The random communication delays existing both from the sensor to the controller and from the controller to the actuator were considered simultaneously. The dynamic output feedback H∞ controller design was given. The result shows that a numerical example presented here illustrates the effectiveness of the proposed method.
An Adaptive Web Information Extraction Approach Based on STU-DOM Tree
Authors: Wu Song Pu , Wang Qing
Published: September 2013

An adaptive web information extraction approach is presented in this paper. Most of the traditional web information extraction approaches depend on the templates of web sites. If the templates are changed, the information extraction rules should be redesigned. To reduce the maintenance costs and improve the adaptability of information extractors, an adaptive web information extraction approach is proposed based on the STU-DOM tree. The webpage is parsed into DOM Trees based on HTML Parser. Then DOM trees are filtered into STU-DOM trees to confirm blocks which contain keywords of a certain topic. The proposed approach is applied to webpages and the results show that the approach not only extracts information efficiently, but also is irrelevant to site structures.
The Research of the Assembly Precision of CNC Machine Tools Considering the Joint Surface Characteristics
Authors: Li Wan Yu , Lu Cong , Yang Zhuo
Published: September 2013

In order to evaluate the assembly precision of the CNC machine tools influenced by the joint surface characteristics effectively, a method is proposed in this paper. Finite element analysis is used to obtain joint surface deformation data, and then a second-order response surface model is established as a surrogate model to express the function of joint surface static characteristics and deformation. The error propagation in assembly sequence is obtained, so that the assembly precision of CNC machine tools can be evaluated effectively.
Research on the Technology of Low-Voltage Power Line Carrier-Current Communication Based on OFDM
Authors: Ding Wen Yan , Sun Zhi Ning , Wang Xiang Long
Published: September 2013

The design on the system of low-voltage power line carrier-current communication based on OFDM was finished in this paper. Then model of the system was simulated and the modulation and demodulation of OFDM were realized. The results show that the integral performance can be enhanced with channel code. And the bit error ratio (BER) of the system is different with several sub-carrier wave modulation modes. This system could satisfy the requirement of power line communication basically.
Improved Binary Tree Search Anti-Collision Algorithm
Authors: Li Chao , Xiong Hai Ling
Published: September 2013

According to the issue of tag collision in the radio frequency identification technology, this paper proposes a binary tree search anti-collision algorithm, which takes different processing methods according to how many continuous collision. Compared with the dynamic binary tree search algorithm, the improved algorithm reduces the query information send by the reader. At the same time,the algorithm in the process of identifying tags reduces the query information, the query number and tag response times, so as to shorten the recognition time, further improve the search performance.
RSSI Based Monte-Carlo Localization Boxed Algorithm
Authors: Qu Qiang , Xia Yong , Jiang Yan , Chen Xue Bo
Published: September 2013

The maximum communication radius is applied to estimate the distance between one hop nodes in the MCB algorithm. However, the distance is generally less than the communication radius in practical applications which will result in the location error to some extent. So, the distance estimated by the received signal strength indication (RSSI) is used to substitute the communication radius in MCB algorithm to improve the estimation precision. The simulation results show that the average localization accuracy of the proposed algorithm is improved by about 14% comparing with the MCB algorithm.
The Design and Research of Virtualization Platform
Authors: Tian An Hong , Fu Cheng Biao
Published: September 2013

Due to the problem of network structure, security, redundant path in traditional network, this can be solved by Virtual Local Area Network (VLAN) technology. As the network laboratory in colleges and universities is not perfect because of high cost, a virtual simulation tools named Packet Tracer has been introduced to computer network experimental curriculum, this paper put forwards the detail design scheme by the example of VLAN with three switches, and provides the experiment and theoretical analysis and simulation verification .The practice has proved this method not only deepens students comprehension of network, but also cultivates the students' actual comprehensive ability.
Tunnel Face Image Segmentation Optimization
Authors: Du Cheng , Leng Biao
Published: September 2013

With the development of Transportation Highway and railroad build, mining tunnel geological exploration in the road construction in the proportion of great. This paper presents a design of image processing software of Geological Engineering images for automatic analysis and processing. At present, the technology of image processing, most algorithms are based on the specific image information of specific analysis, and the face image is very complicated, different regions, and even the same construction sections in different areas of the face image may have very big difference. For the tunnel excavation face of digital image processing algorithms have little, need to start from scratch. This paper describes the use of digital image processing technology of Geological Engineering image image segmentation, found on the rock face, through the comparison of edge detection operator and Sobel Gauss - Laplasse operator methods advantages and disadvantages, a value of two images as the processing object image processing algorithm. The technology of Geological Engineering image analysis on tunnel construction period prediction plays a very important role.
The Frequency-Domain Analysis of the Rheological Data Acquired with Multi-Function and All-Electric Rheometer
Authors: Li Xiang Gang , Li Du Xin , Liu Yue Jun , Feng Pei Yong , Du Chun Yan , Zhao Fang
Published: September 2013

The key parts of multi-function and all-electric rheometer (MAR) designed by the authors were introduced. The data processing method based on frequency-domain analysis were established. Intrinsic vibration displacement is defined to eliminate the effect of steady velocity displacement and extract the useful information of vibration displacement. The actual frequency, amplitude and phase of the superimposed vibration displacement and the entrance pressure were obtained by the frequency-domain analysis of the intrinsic vibration displacement and the entrance pressure. The control precision of the superimposed vibration displacement frequency and amplitude of MAR proved to be high. The direct current component of entrance pressure can be seen as the mean entrance pressure which stands for the flow resistance. The study of mean entrance pressure is useful in discovering the energy consumption mechanism of the polymer processing introduced vibration energy. Loss angle can be calculate according to the phase of entrance pressure and superimposed vibration displacement. The higher order harmonic of the entrance pressure can be used to characterize the nonlinear viscoelasticity of polymer melts. The factors which depend on the shear rate and influence the viscoelasitic properties can be studied by test the loss angle based on MAR.
A New Method of Fundus Image Enhancement Based on Rough Set and Wavelet Transform
Authors: Zhao Wen Dong , Zhang You Dong , Jin Chun Xia
Published: September 2013

Fundus images are complex images with more details, and on the basis of the inadequate fuzzy enhancement algorithm proposed by Pal et al, this article propose an improved algorithm of rough set for fundus image enhancement. The fundus image will be multi-scale decomposed by wavelet transform firstly, and then the subgraphs are enhanced by using rough set to improve the visual effects; finally the processed sub-images will be reconstructed and generated a new-enhanced image. Compared with the Pal algorithm, the new algorithm not only overcomes its weaknesses that the threshold is set with a fixed value, but also reduces the number of iterations. Experimental results show that the improved enhancement algorithm has a better effect on the fundus image enhancement, and the various details of fundus images can be shown better.
Ultrasonic Testing Signal Denoising Based on Matching Pursuits
Authors: Du Xiu Li , Jiang Ying Hua
Published: September 2013

When matching pursuits (MP) method was used for noise suppression of ultrasonic testing signals, the number of matched atoms affects the denoising performance. The relationship between the number of the matched atoms and denoising capability was analyzed, using the root mean square error (RMSE) and improvement of signal-to-noise ratio (SNR) to evaluate denoising performance. The simulated signals with white noise at different SNR and experimental signal with white noise and grain noise were analyzed respectively, and the results show that the MP method can remove the white noise and grain noise effectively. Moreover the best denoising performance can be arrived if the number of matched atoms is appropriate. At last, the selection principle of atoms number is given.
Image Denoising in Frequency Domain Based on Analogical Basis Deconstruction
Authors: Liu Feng Qin , Chao Zhen , Ji Yuan Yuan , Zhang Qi , Miao Peng
Published: September 2013

In acquisition and transmission procedures, images are often contaminated by noise in spatial and frequency domain. Image denoising is usually the first step in information extraction. At present there are many frequency domain denoising methods like low pass and high pass filtering but have not yet attained a desirable level. In this paper, we proposed a new denoising method based on Analogical Basis Deconstruction (ABD) theory. It uses only uncontaminated or slightly contaminated frequency data to recover the image through Asymptotic Iterative Estimate (AIE) algorithm. The performance of new method was tested on a simulation image and compared with the traditional frequency domain methods.
Web-Based Media Asset Management System Design
Authors: Deng Lei Lei
Published: September 2013

With the social development, networking of information products is enhanced. Media asset management system as a resource management platform must evolve in order to better serve users. Combined with today's more widely used solutions to the industry popular media asset management system design for partial revision proposed optimized media asset management system design ideas.
Research on Asset Recognition Algorithm of Information Security Product Based on Decision Tree Algorithm
Authors: Shuai Fei , Li Jun Quan
Published: September 2013

In current, there are complex relationship between the assets of information security product. According to this characteristic, we propose a new asset recognition algorithm (ART) on the improvement of the C4.5 decision tree algorithm, and analyze the computational complexity and space complexity of the proposed algorithm. Finally, we demonstrate that our algorithm is more precise than C4.5 algorithm in asset recognition by an application example whose result verifies the availability of our algorithm.Keywordsdecision tree, information security product, asset recognition, C4.5
Fast Tone Mapping Based on Sorting
Authors: Liu Feng Qin , Zhang Yi Guang , Chao Zhen , Miao Peng
Published: September 2013

Visualizing high dynamic range image or video on traditional display devices need fast tone mapping technique. Traditional bin-based histogram equalization is fast enough but cannot handle high dynamic range data, e.g. single or double precision. Other common tone mapping methods require a high computational complexity. In this paper, we propose a new continuous data equalization method based on simple sorting, which can quickly and efficiently enhance the visualization of high dynamic range data. This method can be applied to real-time visualization of high dynamic range video with cost effective hardware acceleration.
Research on Online Visual Inspection System for Multi-Feature Trademark Defect
Authors: Yang Bo , He Bang Gui , Chen Yu
Published: September 2013

Modern printing industry detective techniques, which have transferred from traditional single discrete manual operation into line detection based on machine vision. The line detection research under the highly automated process requirements, which is based on color graphics, gravure text, high-speed stamping and laser hologram hot stamping technology, is the multi-feature defect detection and recognition. By CDD study linear measurement techniques and computer vision technology, the research built the visual inspection platform, and design detection scheme combined with the specific requirements of the printing process in database technology and image processing technology. Research obtained the online testing solutions and system information flow characteristics, which achieved requirement of multi-feature detection, high precision and high speed continuous production technologies.