bluuebunny/crossref_metadata_2025 huggingface dataset:
Manipulator Joints Servo Motor Control Strategy
Authors: Yang Lin , He Yong Yi , Guo Shuai , Bao Sheng
Published: May 2013

The manipulator with the characteristics of strong coupling, non-linear and time-varying. According to those, the article researched the manipulator properties through dynamics and SPMSM speed regulation mechanical property, calculating the torques through Lagrange equation and transferring to relative current equations, then bringing out the manipulator servo control method based on SVPWM and high gain current feedback. Thus, the joints controls are simplified to independent joints servo motors control, realizing the high dynamic manipulator control. Finally, the validation of this method is verified by setting up the experimental platform with SPMSM and ZX165U manipulator.
Study on the Design of Particle Removal System for Autonomous Robotic Vehicle
Authors: Putra Bagus Bhirawa , Xu He , Jie Liu Zhao
Published: May 2013

The robustness of an autonomous robotic vehicle (ARV) and the embedded supporting architecture permit the investigation of a wide spectrum of research options for particle removal and cleaning apparatus. Applications for particle removal are aimed at supporting the autonomous vehicle in performing its mission, especially in areas considered hazardous, hence emphasize the importance of the embedded system in which the development of air and water jet nozzle is being introduced. By understanding the present basic theory and design methodology, this would capture the outline for future developments of the novelty in particle removal methods especially in an autonomous robotic vehicle (ARV). Accordingly, it can be ascertained that at the same time the main line of the research on particle removal methods remains clear, still in a correspondence research context it is relatively easy to identify alternative subjects which are worthwhile to investigate further.
A Multi-DOF Robotic Arm Manipulator Simulation and Visualization Platform
Authors: Zhang Yu Zhu , Meng Xin , Pan Zhong Shi
Published: May 2013

As robots are employed in various fields of manufacturing process, its modeling and analysis is an important process during robot design. Therefore, based on simulation technology, a multi-degree of freedom (DOF) robot arm manipulator simulation and visualization platform is proposed due to the DOF of the joints on a robot differs in specific projects. The Denavit Hartenberg (DH) parametric scheme is adopted in the workspace analysis and relative position computation model. The latter calculates the distance and position between the end-effector and the target. And then, a test case using the platform is presented, the results showed that the platform is feasible for robot design.
Study on the Wheeled Robot Collision Avoidance Based on Fuzzy Control
Authors: Zhang Su Ying , Xu Shao Jie , Du Yun , Zhu Jing Fei
Published: May 2013

Wheeled robot walk because of its simple structure,continuous advantages of smooth, fast and easy to control, is often used as special robot, but wheeled robot at run time, facing one of the major issues is how to avoid obstacles, increase system reliability. Introduction of fuzzy control algorithm in this article, by rational design of fuzzy rules, plan routes, to achieve effective avoidance, collision of the simulation results show that the fuzzy control can be effective, improves the reliability of robots running.
The Kinematic Analysis of the Walking Mechanism Based on the Leg-Wheel Mobile Robot
Authors: Li Peng Hui , Li Rong Ye
Published: May 2013

In the studying and designing process for the robotic walking system, a theoretical analysis and simulation on the kinematic characteristics of the walking mechanism of the robot is done. From our experiments, the characteristic curves of velocity and acceleration of the drop-foot point are obtained. The walking mechanism is stable in the translation cycle, which contributes to the stability of the robot motion, while the robot still can move at a certain speed. The stress of the walking mechanism is complicated in the step cycle, because both the velocity and acceleration get a certain amount of mutation.
Mechanism Design and Kinematics for Parallel Manipulators with a UPU Limb
Authors: Wang Xiao Hui , Zhang Jian Jun , Qi Kai Cheng , Li Wei Min
Published: May 2013

The workspace of the parallel manipulators is relatively smaller than the serial manipulators. In order to improve the rotational capability, a new type of parallel manipulators with special topology structures and a special limb is proposed. The peculiarity is that the parallel manipulators involve a UPU limb, which makes their mobile platforms rotate continuously. Mechanisms of the type of parallel manipulators are described, and a general structure for this kind of parallel mechanisms is given. Moreover, their kinematic equations are developed to analyze their input-output characteristics. The research can enlarge the application area.
Application of Go-Flow Methodology to the Reliability Evaluation in CNC Machine Tools
Authors: Yu Jie , Yu Shuang , Song Yu Mei , Wang Ting Ting , Li Qian Chan , Sun Li Da , Li Zhan Guo
Published: May 2013

Basic principle and methods of Go-Flow methodology have been introduced. In light of the characteristics and analysis demands for CNC machine tools, methods and procedures to evaluate the reliability of CNC machine tools have been put forward.
Research on the Positioning Servo Control Strategy for CNC System
Authors: Zhang Li Bing , Wu Ting
Published: May 2013

In order to overcome thelimitation of the position servo control method of computerized numerical control(CNC) system, a control approach of generalized predictive control (GPC) ispresented in this paper. In the method, the GPC model calculates the optimalcontrol rate through the predictive model and rolling optimization as thecontroller of the position servo system. Compared with GPC and proportional-integral-derivative(PID) control, the simulative and experimental results show that the proposedcontrol approach has better the dynamic performance, steady-state performance,and robustness.
Algorithm Research of Two-Dimensional Size Measurement on Parts Based on Machine Vision
Authors: Li Cai Hua , Zhang Jin Bo , Hu Xiao Ping , Zhao Guo Fu
Published: May 2013

With the rapid development of computer science, image processing, and pattern recognition, people are paying more and more attention on research and application of machine vision, which has resulted in excellent results in many fields. Depending on the features of untouched, fast-speed, real-time, proper precision, anti-interference, the inspection technology based on machine vision has been researched deeply and comprehensive applied aboard. Recently, the size measurement technology based on machine vision has been applied in the size measurement of the machine processing parts. A case study of typical regular mechanical parts, algorithm of position and size measurement of line, circle center and radius are researched, and good results are got, which established an academic foundation for further measurement of complex parts.
Abnormal Behavior Recognition Based on Features Fusion
Authors: Tao Yu , Wei Yong Chao
Published: May 2013

One framework that fuses features for abnormal behavior recognition in videos was proposed, which provides increased robustness to noise and pose variation. First, ROI division of suspected pedestrian is achieved by optical flow method, which greatly reduces the dimensions of training data. After that, the proposed method uses the adaboost training to recognize pedestrian effectively. To capture the imaging variations and attributes of individuals, we use types of features: center track and inclination angle. Finally, D-S evidence theory is used to combine these features, which aims to recognize the abnormal behavior correctly. The results demonstrate that the recognition rate can be improved by the fusion of features.
A Novel Architecture of Smart Camera
Authors: Xiu Xiao Yu , Zhou Guo Hui
Published: May 2013

The system hardware and software architecture of smart camera does not follow a common standard subject to their versatile application field. This paper presents architecture of smart camera in order to making the smart camera unified and applied to typical fields. It provides a hardware and software case to inspect the steel ball quality in the real time. The result shows that the architecture can meet the requirements of smart camera in several application fields.
Number and Colors Recognition for the Beaded Pad
Authors: Liu Zhi Jun , Yao Li Gang , Yan Jian Ye , Lin Dong Liang
Published: May 2013

The hand made beaded pad is getting more and more expensive due to the increasing labor costs and its necessary to develop the beaded pads weaving machine. One of the key problems for beaded pads weaving machine developing is the beaded pad image pattern recognitions including the beads number and colors. This paper focuses on the researches of identifying the beads number and the colors of the beaded pad image. First, the beads number of the pad image is identified by threshold and calibration methods. Then, the beads are separated from the image background and the beads colors are identified by the characteristics analysis for the RGB color space of the pad image. Finally, the verification is further provided by computer simulation and the beads pad reconstruction, and the results show that this proposed method can identify the number and the colors for the beads in pad image accurately.
Video Noise Estimation Based on Block Neighborhood Relevance
Authors: Di Hong Wei , Zheng Shu Meng , Gao Hui
Published: May 2013

Aimed at Gaussian white noise, a video noise estimation algorithm based on block neighborhood relevance is demonstrated. Firstly, a differential operator is taken between two sequential video frames. Then, the smooth blocks are selected between original video and differential video based on block neighborhood relevance. Finally, by computing the weighted average of the noise variance of the smooth blocks, the noise variance estimation is achieved. Experimental results show that the proposed algorithm works well.
Multi-View Vehicle Recognition Based on WRT-SVM
Authors: Wu Xing Gang , Guo Cong
Published: May 2013

Proposed an approach to identify vehicles considering the variation in image size, illumination, and view angles under different cameras using Support Vector Machine with weighted random trees (WRT-SVM). With quantizing the scale-invariant features of image pairs by the weighted random trees, the identification problem is formulated as a same-different classification problem. Results show the efficiency of building the randomized tree due to the weights of the samples and the control of the false-positive rate of the identify system.
The Development of Wavelet Transform and its Application in Image Denoise
Authors: Dai Ming Hong
Published: May 2013

The paper introduces Laplace pyramid, Ridgelet and Curvelet principle, structure and methods, and their denoising experimental studies. It also introduces the traditional direction filter of principle, structure and methodology, and the simulation experiments show that its image denoising PSNR is slightly lower than wavelet but denoising image visual quality is better than former. To that end, proposed a new direction filters that uniform direction filter banks and non-uniform direction filters, proved filter passband condition and related design and implementation issues were discussed. nonlinear experiment shows that the new direction filter bank was better than the wavelet.
An Image Encryption Algorithm Based on Oversampled Chaotic Map
Authors: Liu Shu Cong , Song Yan Xing , Yang Jing Song
Published: May 2013

A new image encryption algorithm based on chaotic sequence is proposed, and the over sampled techniques is used in the Chebyshev mapping and Logistic chaotic mapping to generate multi-parameter chaotic key.A chaotic image encryption transmission system is build to achieve the encryption and decryption of the image signal,and the security and the encryption properties of the algorithm are analyzed. Simulation results show that the method ia simple and easy to achieve, and with larger key space ang good encryption effect.
Background Subtraction Based on Gaussian Mixture Model
Authors: Liu De Fang , Deng Ming , Wang Dai Mu
Published: May 2013

According to the detection of moving objects in video sequences, the paper puts forward background subtraction based on Gauss mixture model. It analyzes the usual pixel-level approach, and to develop an efficient adaptive algorithm using Gaussian mixture probability density. Recursive equations are used to constantly update the parameters and but also to simultaneously select the appropriate number of components for each pixel.
Optimization Analysis of Box-Behnken Experiment Design Based on Husker Capacity
Authors: Wu Yi , Ruan Jing Lan , Wu Wei Wei
Published: May 2013

In rice processing courses, the working parameters of rubber roll husker, including contact pressure between rolls, inlet flow, fast roll linear speed and linear speed difference, will affect the husker capacity. This paper carried out an optimization analysis based on Box-Behnken experiment design method to discuss the effects of parameters above. The conclusion indicate that if consider rising the husker capacity only, the optimal parameters are: the contact pressure between rolls: 6.18kg.cm-1; the inlet flow: 173.9kg.(cm.h )-1, the linear speed of fast roll: 17.0m.s-1, the linear speed differences: 3.06 m.s-1.
Objective Evaluation of ESP System Based on Hardware-in-Loop Test Bench
Authors: Xuan Sheng Yi , Song Chuan Xue , Meng Guang Wei
Published: May 2013

The evaluation tests play an important role in modern vehicle development. As a mean of judging vehicles performance and quality in the design period, the evaluation tests guide the development and the design. In this paper, objective evaluation of ESP is researched based on the self-correcting threshold PD control algorithm and ESP hardware-in-loop simulation test bench. Real-time test bench is used to simulate the different conditions and the evaluation methods of ESP are tested to verify the effect. By hardware-in-loop simulation, the results demonstrate the objective evaluation method evaluates the ESP system in accordance with the results of self-correcting threshold PD control algorithm and the method could accurately reflect the ESP control effect.
Optimal Fuzzy Control of Automated Mechanical Transmission Clutch Engagement during Start-Up Process
Authors: Jin Han Yu , Cheng Xiu Sheng , Song Yong Dao
Published: May 2013

Engagement control of the clutch in the starting process is the core part and difficulty of the Automated Mechanical Transmission (AMT) control strategy, which was directly related to the clutch disc lifetime and riding. Engine speed, clutch speed and throttle angle are the only signals to develop clutch control strategy in the entire start-up process made by Transmission Control Unit (TCU) in a vehicle equip with AMT. The TCU even need to determine the driver's intention to select different control schemes. In this paper, fuzzy logic control was adopted in order to eliminate the impact of subtle change during driver operation, thus the start quality was optimized.
Chaos Control of the Fractional Order Stochastic Chen System
Authors: Zheng Jie , Ma Shao Juan , Dong Duan
Published: May 2013

In this paper, we study chaos control of the fractional order Chen system with the bounded random parameter. Firstly, we transform the fractional order Chen system with random parameter into an equivalent deterministic system by the orthogonal polynomial approximation. Secondly, based on Routh-Hrwitz criterion, the derivative feedback control laws are applied to fractional order equivalent deterministic Chen system. Lastly, numerical simulations show that the control method is effective and feasible.
Intelligent Vehicle Control System Based on LED
Authors: Zhang Jie Ping , Cui Shi Gang , Chen Li Yun , Chen Zhi Liang , Tian Li Guo , Wang Yong Liang
Published: May 2013

With the continuous development of LED technology, LED is more and more applied to different fields such as lighting, control. In view of today's ential safety hazard brought by illegal driving, drunk driving and driver’s fatigue driving which lead to the occurrence of automobile rear-end collision and other problems, it put forward a economic, practical treatment and control system, and gave the reasonable design of intelligent vehicle control system based on LED technology and solutions. The system used SCM Atmega16 as the core, combined with LED and communication technology to realize all functions. After tested, it works well.
Research on Control Strategy of Photovoltaic/Battery Hybrid Generation System
Authors: Guo Rui , Wang Xiu Ping , Qu Chun Yu , Bai Di
Published: May 2013

This paper puts forward the unique design, through the research by solar panels, battery, the converter and photovoltaic power generation system composed by switch electrical, and according to the characteristics of solar panels and batteries, the actual situation and the requirements of a stable system, the battery charging and discharging control, etc. Then this paper further researched control strategies of the two kinds of operating mode of electric power grid and battery from nets, designed a converter of rated power 50 kW used for light storage complementary power generation system and light storage complementary test platform. Using the test platform to do the storage battery charging and discharging experiments and away from the grid experiments, the final experiment results show that the hardware design and the control strategy in this paper are proposed correctness and effectiveness.
Engineering Design Based on GPON+WLAN
Authors: Sun Wen Feng , Li Ji Zhong
Published: May 2013

Now the existing access networks have not met the requirements of users, especially the increase of wireless access requirement. So the upgrade or reform of the existing access networks becomes very necessary. To begin with, the technology and network structure of GPON and WLAN are introduced in detail, and then how to combine GPON and WLAN in the engineer is also illustrated clearly. According to the common cases in the engineer, two access ways of GPON+WLAN are also shown. Finally, the summary about the GPON+WLAN is discussed in the paper.
Research the Ceramic Design System Based on Sketch
Authors: Li Bu Sheng , Hu Jing Fang
Published: May 2013

Based on the understanding of the present situation of the domestic and foreign sketches technology application basis, through the existing ceramics product design process and production process flow of the detailed ceramic products of design process are in-depth analysis and decomposition is proposed based on the sketch of the computer aided design ceramic technology, and on the basis of the development of the corresponding ceramic design software.
The Planetary Vibroexciter with Elliptic Inner Race
Authors: Surashev Nurgali , Dudkin Michael , Yelemes Darkhan , Kalieva Aziza
Published: May 2013

We present a method determining analysis of workflow of the planetary vibroexciter, allowing by constructing three-dimensional graphs obtained in MathCAD, combine several line graphs in one. Improves the availability the results of theoretical analysis, the influence of the main parameters of the vibroexciter on its dynamic characteristics. The use of a planetary vibroexciter with elliptic inner race gives substantial advantage in generated driving force against an analog vibroexciter, equipped with a round inner race with the same dimensions and initial parameters. Selecting the mode of setting the spider axis of a planetary vibroexciter in one of focal points of elliptic inner race leads to the increase of generated driving force, 2.2 times on abscissa axis and 2.4 times on ordinate axis, against the central position of the spider axis. This proves the effectiveness of the elliptic planetary vibroexciter use. 1.6 times increase of focal length results in directly proportional increase of driving force projection on ordinate axis, and 2.1 times increase of driving force projection on abscissa axis.
Artificial Intelligence Study: A Two-Sided Being - Teachings from Book of Changes
Authors: Zhao Qing
Published: May 2013

To refer to Book of Changes and the complicated aspects of artificial intelligence, the paper holds that artificial intelligence study is a two-sided being. On the one hand, artificial intelligence study is a “conflicted” being, which concerns the universally acknowledged argument “Can Machines Think?” and the “conflicts” of diverse probing approaches, taking Symbolism, Connectionism and Behaviorism for instance. On the other hand, artificial intelligence study is a “compromised” being, which implies that a variety of factors function spontaneously and together, regarding the communication of science and philosophy, the cooperation of the related disciplines, the transformation of theories and practice, the unity of computer and man as well as the facilitation of scientists’ research and the participation of society.
Performance Evaluation Based on Information Theory for Multi-Target Tracking Algorithm
Authors: Tian Shu Rong , Sun Xiao Shu , Liu Dan
Published: May 2013

This paper is concerned with the performance evaluation of algorithm of multi-target and target types tracking. Performance evaluation is based on information theory, Kullback-Leibler measure is used to discriminate information provided by algorithm. Through simulations, algorithm of multi-target tracking was evaluated in term of information (localization, classification, and target number components) the algorithm provide about the actual state of ground truth.
Research and Design of the Keyboard Filter Driver
Authors: Wang Meng , Zhu Ya Tao , Jin Hua , Liu Jin Gang
Published: May 2013

Driver is a communicated program between the operating system and hardware. It is the responsibility of handling I/O request packet. Keyboard filter driver which used Windows NT driver model is completed in DDK developed environment. This driver realized filtering and recording key information. Its convenient for users to view information of keyboard history. The design of this driver can also be studied for other Windows drivers.
Research on Simulation of Array Directivity Based on MATLAB
Authors: Xiong Hong Jin , Yuan Bing Cheng , Zhan Hao Ke , Luo Yin Bo , Fan Long Long
Published: May 2013

According to the theory of underwater acoustic spread and circular piston transducer array, the mathematical model for the directivity of array is created. By means of MATLAB, the accurate expression method for the figure of array directivity is studied, and the characteristic and difference of the simulation curve in various direction are analyzed. It is shown by the application that, to a certain extent, the conclusion has practical value and guide meaning for the directivity simulation and design of the array.
The Operation of Cool Edit Pro in Corpus-Based Spoken Language
Authors: Chen Jie , Chen Jing
Published: May 2013

Corpus refers to the database of language materials. Cool Edit Pro is a media edit software. This paper explores how to construct spoken language corpus, how to use cool edit pro 2 to make sound wave contrast and give the experimenters an intuitive observation from their own speech waveforms. The key is to offer the obvious waveforms contrast among the sampling waveform of the native speaker, the original and unmodified one of the experimenter and the new waveform of the experimenter after modifications and teachers instructions, which makes the oral autonomic learning more possible and scientific. From long wave or short wave, wave trough or wave crest, smooth wave or sharp wave, the experimenters deviations can be easily identified from the standard during the autonomic practices and efficiently make corrections. Additionally, experimenter also can observe the improvements frequently, which means this experiment more instructive.
Design and Application of a Whole Machine Test Service Platform of Construction Machinery
Authors: Zhou Ke , Li Xiao Dong
Published: May 2013

In order to reduce the pressure of test resource in whole machine tests of construction machinery and provide more efficient service of test and analysis, a whole machine test service platform was designed and applied. Firstly whole machine tests of construction machinery were analyzed. Secondly whole machine test service of construction machinery was analyzed. Thirdly the architecture, function structure and database were designed. Then the application steps of the system were discussed. Feasibility and effectiveness of the system were verified by a case of enterprise application.
Portal Crane Virtual Assembly System Based on Virtools
Authors: Ni Ming An , Tan Yu Ying
Published: May 2013

Portal Crane with its large parts is inconvenient to achieve physical prototype assembly in design process because of its large span and high precision space assembly needs. Considering virtual assembly system can provide designers with specific modules library, person interactive experience and reliable assembly simulation, this paper modularized the MQ4025 Portal crane based on analysis of assembly needs, and accomplished corresponding modules modeling by Solidworks, developed a virtual assembly platform by Virtools, realized collision simulation between components and parts by Collision Detection Building Blocks in Virtools, performed a virtual assembly experiment on the platform. Result shows that the platform completes Portal Crane assembly in a shorter time than physical prototype assembly, and it completes the assembly simulation faster than other CAD software by invoking compositive modules library of Portal crane.
The Key Technology Research of Heterogeneous Product Data Exchange and Sharing in Collaborative Design and Manufacturing System
Authors: Liu Shu Fen , Li Wei Min
Published: May 2013

In the paper, the main research topic is product data exchange of each heterogeneous systems in the process of collaborative design and manufacturing under the condition of mass customization.Based on the research for existing technology of product model information sharing and conversion,put forward the solution to combine STEP with XML,completed product data transfer and exchange among web-based cooperation enterprises. Also,it was researched how to express EXPRESS data model to XML, as well as its application in the network environment, the function of converting STEP Part21 physical file to XML file was realized.
A Three-Dimensional Virtual Manufacturing System with High Confidence for Turning
Authors: Gao Qing Feng , Yu Guo Wei , Song Yu Wang
Published: May 2013

The tool trace of turning is intensive and complex, and its virtual manufacturing with high confidence level needs to be solved urgently. In response to this pressing need, based on the general mathematical model of master-slave alignment for shaft part profiles, efficient and low-redundancy "dynamic grid" for data structure and "tool driving" exact algorithm for cutting path, the paper built a database that was flexible to adapt the data structure, packaged an Open Graphics Library (OpenGL) to form the automatic three-dimensional engine, and developed a three-dimensional virtual manufacturing system with high confidence level for turning, with numerical control code analysis, error correction, tool path simulation of turning process, parts management, all-round display, virtual manufacturing process control and other functions.
Feasibility Design of Derrick Anchor Pile Piling Position Based on ANSYS Optimization
Authors: Zhu Juan , Zou Long Qing , Fu Hai Long
Published: May 2013

Application of ANSYS parametric design language APDL built the model of workover rig derrick-guy line system. Take XJ70 type workover rig for example, optimization of derrick anchor pile piling position has been calculated under the condition of anchor pile ultimate uplift force. The uplift force obtained from pullout tests and different from soil type and soil condition. By optimizing calculation, on the premise of anchor pile bearing safety, the minimum and feasible piling positions have been gotten to guide piling work in special well site conditions. When the bearing capacity of soil decreased, make hook load as design variable, get the hook load limits at each pile position to ensure the ground anchor pile bearing safety.
The Study of Testing Technologies on Energy Consumption of Mass Storage System
Authors: He Qin Lu , Li Zhan Huai , Yang Lei , Wang Huifeng , Sun Jian
Published: May 2013

By analyzing the function structure of mass storage system comprehensively, we decompose the whole system into some single equipment by its own function. Then analyze the device working principle to analysis and description the method of equipment energy consumption. And according to the result, test the cluster system in the lab environment.
A Design of Supervisory Control System of Vehicles Based on Java NIO
Authors: Liu Qiao Wei , Deng Xue Ming , Yan Dong Song , Zhang Yi Fei , Wang Zi Qian
Published: May 2013

We aim to invent a supervisory control system of vehicles based on Java NIO. As we know, it needs to connect a large number of client terminals to accomplish the function of the vehicle supervisory control system and if the server is developed by the traditional blocking I/O, severe blocking problem will appear. To solve the problem, the traditional server has to distribute one thread for each client, which leads to system overload and reduces the servers high-performance. The new supervisory control system which we invent, however, can solve this problem effectively by the use of asynchronous input and output mechanisms provided by the new non-blocking I/O. The new server can manage a large number of socket communications with a single thread, reducing the system overhead and improving the servers performance.
A Method of Web Information Extraction Based on Building Different Sub Trees
Authors: Wang Yuan Long , Jiang Hong , Bing Zhao Hong , Zhang Li
Published: May 2013

When extracting Web information, most researchers mixed the structure labels of DOM Tree with the text content. For solving this problem, we put forward a method of Web Information automatic extraction. Firstly, we get the set of DOM sub trees by partitioning the DOM Tree of the Web Page. Secondly, the nodes of all DOM sub trees are set the corresponding weights by the method this paper proposes. Based on this method, we get each set of different sub trees by comparing with the DOM sub trees which come from two the same data source and belongs to the same category. Thirdly, we get the data zone which contains the extracted information by computing the similarity of every two DOM sub trees in the set of different sub trees. Finally, the node path of every DOM sub tree in the data zone will be taken as the extraction rules which will be used to automatically extract the information from the new Web page of the same category. The experiment demonstrates that there are higher precision rate and recall rate. Meanwhile this method can save the time which the users spend on filtering the information.
A Novel BCI Classifier Based on Autoregressive Model and Support Vector Machine
Authors: Huang Lu , Gu Jun , Li Ran , Li Xiang Jun , Yu Hong
Published: May 2013

The efficient featureextraction and classification are very crucial for brain computerinterface(BCI) system. In this paper, feature extraction and classification forP300, a kind of EEG characteristic potential, was conducted. Afterpreprocessing EEG signals, we used autoregressive(AR) model for featureextraction, segmenting the selected EEG channel data and building AR model foreach segment respectively. AR model coefficients were estimated by using leastsquare method, and the estimated coefficient sequence constituted the featurevector. We applied support vector machine(SVM) for classification andexperimented on real EEG dataset. The experimental results showed the proposedmethod had a good recognition accuracy, being worth researching in the field of BCI.
Study on Tooth Profile of Silent Chain Based on Friction Reducing
Authors: Xue Yun Na , Shen Xue Hui
Published: May 2013

The internal and outside tooth profile of the link plate in the new silent chain can simultaneously mesh with the sprocket when the tight side of silent chain is secant with the sprocket pitch circle in the traditional silent chain drive. The root of the outside tooth profile of the new silent chain is made up of the arcs and can mesh with the sprocket in order to reduce friction. Through the investigation on the transmission progress of new silent chain mechanism, the movement trajectory of the chain link and the sprocket is achieved. The result shows that the conjugate meshing, the small polygon action and the meshing friction reducing can be achieved through reasonably designing the tooth profiles of the link plate and the sprocket.
Analysis of Capacity Bound on Two-User Transmitter Preprocessing Weak Interference MIMO Channels
Authors: Liao Mang , Wang Meng Xing , Jin Ling Xu
Published: May 2013

In information theory (IT), it is an open problem for thirty years to establish an entire capacity bound of two-user Gaussian weak interference network. Under the assumption that channel situation information (CSI) is known at transmitter, we analyze the effects of three methods of transmitter preprocessing on performance of weak interference MIMO channels. Due to treat weak interference as noise, the bounds on the capacity region of two-user Gaussian weak interference channels (ICs) with the three transmitter preprocessing methods are derived. Compared with the performance without transmitter preprocessing, the sum rate in our system is larger. Finally the simulation results are proposed to be consistent with the theorem.
Modeling and Analysis of the Threats to GNSS
Authors: Zhang Wang Xun , Hou Hong Tao , Peng Pai , Wang Wei Ping
Published: May 2013

The vulnerability of the global navigation satellite systems (GNSS) makes it susceptible to a variety of threats, so it is significant to study the effects of each threat on GNSS performance. To analyze the impacts of different threats, a dynamic master logic diagram (DMLD) based modeling and analysis method was presented. First the relationships between threats and GNSS performance were built through a quadric associations by DMLD symbols, then qualitative and quantitative analysis was done via DMLDs great reasoning power, at last qualitative and quantitative analysis could show engineers and researchers the effects they concerned about and also could support the improvement of GNSSs defense and protection capability. The DMLD based method provides engineers a feasible way for threats modeling and analysis.
Implementation of Embedded Mobile Device Elliptic Curve Algorithm Fast Generating Algorithm
Authors: Zhang Li Hong , Chen Shu Qian
Published: May 2013

Elliptic curve cryptosystem is used in the process of embedded systems, the selection and generation algorithm of the elliptic curve will directly affect the efficiency of systems. From Elliptic Curve's selection, Elliptic Curve's structure, Elliptic Curve's generation, this paper discussed the realization of a random elliptic curve method of Embedded Mobile Device, the SEA algorithm and its improved algorithm. The results show that this method can achieve a quick implementation of the elliptic curve method to improve the operating efficiency of embedded systems in the same security guarantees.
A Design of Automatic Bus Station Reporter Based on the Interrupt System of ATmega128
Authors: Deng Xue Ming , Yan Dong Song , Wang Zi Qian
Published: May 2013

On the basis of GPS module, MP3 module and GPRS module, we aim at designing a bus station reporter developed by the interrupt system of ATmega128. This kind of reporter can make use of the rich interrupt sources provided by ATmega128 to accomplish the functions like receiving and sending the longitude and latitude data, announcing voice messages etc and deal with the reporter’s multifunction, which MCU cannot accomplish at the same time. In addition, the use of interrupt system can greatly simplify the programming, reducing its difficulty and at the same time, it is more convenient for the reporter to expand its functions.
Multiple Faults Detection with SoC Dynamic Reconfiguration System Based on FPGA
Authors: Wang Cong , Liu Yi Long , Jiang Peng Long , Zhang Qing Zhen , Tao Fei , Zhang Lin
Published: May 2013

Multiple faults detection has great significance in practice. A dynamic reconfiguration SoC (System on Chip) system based on FPGA (Field Programmable Gate Array) is designed to realize multiple faults detection and reduce the detection time. Also, a framework of software platform and a case study for demonstrating and validating the SoC dynamic reconfiguration system are proposed.
The Implementation and Validation of Multidimensional Kalman Filter in SoC System
Authors: Zhang Qing Zhen , Jiang Peng Long , Liu Zhun , Wang Cong , Tao Fei
Published: May 2013

Kalman filter is one of the most effective methods to recover the signal influenced by noise. Kalman filter algorithm is implemented by the MicroBlaze embedded in SoC (System on Chip) system. A software platform for validating the algorithm is proposed and a case study is given to illustrate its application.
Research and Design on the New Type Wheel Loader Electronic Scale
Authors: Ouyang Cheng Ji , Xu Hai Xian , Zhang Hong Juan , Huang Bin
Published: May 2013

Specific to the problems of current loader weighing device, for example, lack of accuracy and poor real-time processing ability, this paper designed a new type loader electronic scale and introduced μC/OS-II operating system into this system. Besides, GPRS communication module is added and the digital sensor is installed. At the same time, CAN bus is applied to carry out information transmission, which effectively improves the accuracy, real-time processing ability and anti-interference ability of loader electronic scales.
Research on Data Display for New Electric Vehicle
Authors: Bai Qiu Chan , Jin Chun Xia , Yang Ding Li , Wang Ma Hua
Published: May 2013

Based on the data display of instrument for the current electric vehicle is imperfect, this paper puts forward designing a generic electronic instrument of electric vehicle with speed, mileage and power data display function. The microcontroller of AT89C52 is the core of system design. The design uses Hall sensor as a speed detection sensor to realize the mileage/speed measurement display of electric vehicle. It uses the 24C02 saving the mileage information in case of power-down system, uses LED module in real-time displaying the speed, mileage and power, and provides the alarm function of hypervelocity. The design of the system is in real time, running well in the test, may be promoted to the electric vehicles research and development industry.
Improvement of PSO Algorithm Based on Brown Motion and its Applications to Adaptive Filter
Authors: Shen Xiao Song , Zhang Jie
Published: May 2013

In this paper, the Brown motion PSO is proposed to deal with the slow convergence, low precision and local optimal problem of the Particle Swarm Optimization (PSO) algorithm in solving the complex functions. The wave operator is designed, which is similar to the differential mutation operator, to improve the particle velocity formula. The new algorithm is applied in the design of the adaptive filter; Experiments results show that the new algorithm has the faster convergence than the traditional PSO algorithm, and it has the better stability.
Hydrodynamic Responses Analysis for Tension Leg
Authors: Chen Jian Min , Kong Xiang Ying , Sun Yan
Published: May 2013

It is very important to do hydrodynamic analysis for TLP in its basic design process. This thesis studied the hydrodynamic behavior of a traditional TLP. DNV/SESAM software was used to do the modeling and calculating work. Totally three models were built, including panel model, mass model and structure model. Response Amplitude Operator (RAO) was calculated, and the combinations of wave directions and wave periods, which would affect the platform to the most degree, were obtained by analysis. Short-term statistics were analyzed with coupled analysis method to give out the extreme values of motions in a short period. And thus the platform motion and load conditions in this period could be predicted. The results show that this TLP has a reasonable global performance and meets the requirement of production.
Load Spectrum Compilation Based on Nonparametric Statistical Extrapolation
Authors: Xu Zhi Qiang , Wang Hong Jian , Yao Ming Yao
Published: May 2013

Considering the special load characteristics of the wheel loader, thispaper focus on compiling the load spectrum of the transmission of the wheelloader using the nonparametric statistical extrapolation method (NSEM). In thisprocess, the determination of the kernel function shape is the critical issue,which has been discussed in detail. Before extrapolating the sample loadspectrum, the signal denoising of the field-tested time-history load signals isperformed. After that, the sample load cycles are obtained using the rainflowcounting method and the corresponding kernel function shape is determined. Thenthe NSEM of rainflow matrix is proposed, by which the whole-life load spectrumis estimated. The proposed extrapolation method can well realize the estimationof the load cycles that do not appear in sample load cycles but may exist inthe whole-life load history.
Pattern Recognition for Partial Discharge in Power Transformer Based on Probabilistic Neural Networks
Authors: Shang Hai Kun , Yuan Jin Sha , Wang Yu , Jin Song
Published: May 2013

Partial discharge diagnosis plays an important role in condition monitoring of power transformer. Different discharge types cause varying degrees of effects on insulation degradation. Therefore pattern recognition for partial discharge is necessary for power transformer fault diagnosis. Probabilistic Neural Networks (PNN) is based on the theory of Bayesian minimum risk which perfectly fits for classification. In this paper PNN is employed for pattern recognition of partial discharge. 18 characteristic parameters are extracted from UHF partial discharge signals as the inputs of the PNN classifier. Results show that the PNN method gives fast and accurate classification performance.
Multi-Location Inventory Model Considering Bidirectional and Unidirectional Transshipments Simultaneously
Authors: Zhong Jin Hong , Zhou Yun
Published: May 2013

Abstract. A cross-regional multi-site inventory system with independent Poisson demand and continuous review (S-1,S) policy, in which there is bidirectional transshipment between the locations at the same area, and unidirectional transshipment between the locations at the different area. According to the M/G/S/S queue theory, birth and death process model and approximate calculation policy, we established inventory models respectively for the loss sales case and backorder case, and designed corresponding procedures to solve them. Finally, we verify the effectiveness of proposed models and methods by means of a lot of contrast experiments.
On Optimization of Multi-Class Logistic Regression Classifier
Authors: Jin Xiao Bo , Yu Jun Wei , Wang Gui Cai , Zhu Peng Fei
Published: May 2013

The classical multi-class logistic regression classifier uses Newton method to optimize its loss function and suffers the expensive computations and the un-stable iteration process. In our work, we apply two state-of-art optimization techniques including conjugate gradient (CG) and BFGS to train multi-class logistic regression and compare them with Newton method on the classification accuracy of 20 datasets experimentally. The results show that CG and BFGS achieves better classification accuracy than the Newton method. Moreover, CG and BFGS have the lower time complexity, in contrast with Newton method. Finally, we also observe that CG and BFGS demonstrate similar performance.
Quantum-Behaved Particle Swarm Optimization Dynamic Clustering Algorithm
Authors: Zhang Chun Yan , Chen Wei
Published: May 2013

This paper proposed a revised quantum-behaved particle swarm optimization algorithm utilizing comprehensive learning strategy to prevent the universal tendency of premature convergence, based on which introduced a novel data clustering algorithm as well. The optimal number of cluster could be automatically obtained by this novel clustering algorithm because a new special coding method for particles was used. Compared with another two dynamic clustering algorithms on five testing data sets, the proposed dynamic clustering algorithm based on the comprehensive learning strategy has the best performance and with the best potential application prospect.
Research on Intelligent Reactive Power Optimization Method for Distribution Network with DFIG Wind Farm
Authors: Wang Ling Yun , Zheng Ye Shuang , Yang Min Wei
Published: May 2013

In order to ensure the voltage stability of distribution network with doubly fed induction generator, it is more significant to determine the reactive power distribution of the grid reasonably except installation of on load tap changing transformer and shunt capacitor bank. However, the reactive power control capability of doubly fed induction generator is not fully implemented in the reactive power optimization of distribution network. In this paper, on the premise of utilizing wind energy maximally, the wind farm with doubly fed induction generator is considered as a continuous reactive power source to participate in the reactive power optimization. Then the constructed reactive power optimization problem is converted to a nonlinear mixed integer optimization problem which is solved by intelligent genetic algorithm. Finally, the IEEE 16 node system is chosen as an example for simulation, the computation results verify the effectiveness of the proposed algorithm.
Research on Ship Part Nesting System Based on Energy Principle and Intelligent Optimization
Authors: Zhong Xiang Qiang , Liang Li Dong , Yang Yan Hong
Published: May 2013

A nesting system based on minimum potential energy principle and intelligent optimization for ship part nesting problem was proposed. Discussing polygon judgment and separation, intersection test and collision problems of ship parts, a kind of polygon overlap detection method was put forward, and contacting process was analyzed by use of envelope rectangle intersection test algorithm; During analyzing ship part nesting process based on minimum potential energy principle and genetic algorithm fusion, basic physical meaning of nesting problem was explained from mechanics. Throng intelligent ship part nesting system verification, the algorithm is feasible, physical meaning is clear; it can realize ship part nesting.
Design and Realization about Virtual Experiment to Mensurate Airfoil Pressure Distribution
Authors: Ming Lei , Wang Shu Qiang , Liu Xiu Juan , Li Song , Jin Dun
Published: May 2013

This project designed and accomplished a series of aerodynamics virtual experiment software including To Mensurate Airfoil Pressure Distribution based on Computational Fluid Dynamics, multimedia technologies, and other modern computer technologies. The results showed that the series of virtual experiment software are successful and effectual. It was concluded that virtual experiment designed scientifically and rationally can reform practical teaching.