bluuebunny/crossref_metadata_2025 huggingface dataset:
Short-Term Load Forecasting for Electric Power System Based on DB Wavelet and Regression BP Neural Networks
Authors: Zhang Kun , Wang Yan Hui
Published: August 2013

In order to ensure the dynamic balance of power load and improve the accuracy of short-term load forecasting, this paper presents a method of short-term load forecasting for electric power based on DB wavelet and regression BP neural networks. In this method, we get the wavelet coefficients at different scales through series decomposing of wavelet decomposition to load sample, and each scale wavelet coefficients for threshold selection, and then trained adjusted wavelet coefficients by regression BP neural networks, reconstructed load sequence predicted date through inverse wavelet transform. Finally, the accuracy of this method is significantly higher than BP neural network by examples verification.
Design of the Pixel and Row Driving Circuits Using IGZO TFT for QVGA AMOLED
Authors: Yang Chun Cheng , Chen Xin , Zhang Jian , Li Chuan Nan
Published: August 2013

An Amorphous IGZO (a-IGZO) TFTs pixel driving circuit and row driving circuit for AMOLED are proposed. The pixel driving circuit is composed of four a-IGZO TFTs and one capacitor (4T-1C), which effectively compensates the threshold-voltage-shift (ΔVth1V) of the drive TFT, and shift registers, NAND gates and inverters constitute the row driving circuit. To verify the effect of the proposed circuit, simulation using H-spice was performed, and results prove that the presented circuit can be applied to monochromatic 2-inches QVGA AMOLED.
Design of Electromagnetic Mechanism with Finite Element Method
Authors: Yuan Duan Lei , Wang Hai Yan , Zhu Zhi Hao , Dong Hua Jun
Published: August 2013

A closing electromagnetic mechanism for rail transit direct-current circuit breaker is designed. But it is found that the temperature is too high when the mechanism kept closing for a long time because of the coils high power. Based on the theory of electromagnetic field and electromagnet design, the distribution of magnetic field and the electromagnetic force of electromagnetic mechanism are simulated by finite element analysis software ANSYS. An improved mechanism is manufactured according to the simulation results. The experiments show that the improved scheme can effectively reduce the electromagnetic mechanisms closing maintenance power, and the accuracy of simulation results is validated.
Research on the Problem of Priority Inversion in Embedded RTOS
Authors: Cheng Xiao Hui , He Jun Quan , Liang Qi Liang
Published: August 2013

Pointing to the unpredictable problems that caused by the priority inversion during the period of using real-time application system, a new improved method, which based on the priority inheritance, was presented. The new method mainly considered the influence that the usage of shared resources impacted on the task scheduling, and recorded the information of each task which asked for the using of system resources by a set of task-shared-resource-link. System would schedule the task according by the records and the task waiting queues. This method was proved as a effective way to solve the phenomenon of priority inversion by experiment in ucos-ii kernel.
Application of Thermal Design Method for Industrial Ethernet Switch
Authors: Tao Jing , Wu Peng , Chen Lei , Liu Chuan
Published: August 2013

With the rapid development of electronic technology, the integrations of chips and modules become much more complex. Various types of communication equipment with more functions which make the heat of the device to increasingly become a problem. High temperatures may seriously affect the validity and reliability of electronic equipment and components. In order to dissipate the heat to the ultimate sink, thermal design need to design low thermal resistance paths both inside the electronic device and between the electronic device and the external environment. Industrial Ethernet switch runs in harsh environment, and the reliability, stability, security, environmental adaptability requirements higher than that of commercial Ethernet switches, these require a higher standard thermal design.
Resilient Guaranteed Cost Control for Singular Systems with Time-Varying Interval Delay
Authors: Zhang You Gang , Li Rui
Published: August 2013

The problem of resilient guaranteed cost control for a class of singular interval systems with time varying time-delay was investigated. A condition for the existence of resilient guaranteed cost controller is derived via linear matrix inequalities (LMI) technology. Furthermore, it is shown that this condition is equivalent to the feasibility problem of a set of LMIs, and its solutions provide a parameterized representation of resilient guaranteed cost controllers. Finally, a numerical example is given to show the effectiveness of it.
Research on the Mining Technology of Multimedia Communication Data Flow Based on Computer Network
Authors: Cheng Yong Hong , Ouyang Li Hua , Liu Xin Yan
Published: August 2013

computer network multimedia communication has spread all over daily work and life fields, people also have put forward higher requirements for computer multimedia communication network. Based on current network multimedia communication, there are a large amount of data transmission, high-speed and dynamic characteristics, the mining technology of its communication data flow is carried out related to research. In this paper, the frequent item sets of data stream mining technology is carried out related to research, and the classical HCOUNT algorithm is carried out relevant analysis, according to the relevant analysis, the classical HCOUNT algorithm is improved, in order to alleviate possible error problem in data mining. Finally, the data stream mining algorithms are carried out relevant analysis of actual experimental data. Study on the technical aspects of the data flow mining in computer network multimedia communication, it is an important role in the development of the computer network multimedia communication. Study on the improvement of the current algorithm, it provides reference in the similar field of algorithm research
Fusion Research of Remote Sensing Image Based on Compressive Sensing
Authors: Wei Chao , Liu Dong Mei , Wang Fan , Chen Ling Yan
Published: August 2013

Compressive Sensing provides a new method of signal processing, when the image signal is sparse or can be com-pressed, it is possible to substantially lower than the Nyquist sampling rate, the sampling mode of the image signal is sampled, and by recovery algorithms to restore the image signal. This theory can greatly reduce the amount of data calculated in the storage, processing and transmission of the image signal. Based on this theory, the paper presents the method of remote sensing image fusion in compressed sensing domain. Firstly, the image for fast Fourier transform and measurement sampling, namely to obtain the compressed perception domain data, and then using the weighted data fusion, the final fused image is obtained by solving the optimization problem of the reconstructed image. Through the experimental proved that, this fusion method deal less data but fusion effect good.
A Behavior-Based Rapid Method for P2P Traffic Identification
Authors: Ge Jun Wei , Zhao Ming , Fang Yi Qiu
Published: August 2013

This paper presents a rapid identification model and analyses the behavioral characteristics which is different from non-P2P applications on link pattern through analysis on three P2P applications. This method classifies P2P applications in the background and improves the recognition efficiency through the effective combination of behavioral characteristics and valid flows filter on the premise of maintaining the recognition accuracy. In the packet processing, matching frequency parameter has been using to increase matching efficiency. The experimental results show that P2P traffic can be effectively identified by this method.
Research on Registration Algorithm in Super-Resolution Reconstruction of Video Image
Authors: Liu Hong Hai , Hou Xiang Hua
Published: August 2013

In super-resolution reconstruction, there exists the defect that common template matching costs much memory and time. In this paper, the template matching algorithm is optimized. Firstly, a mathematical model of super-resolution is established. Then, the importance of image registration is discussed in super-resolution reconstruction of video image. Subsequently, the method of template matching for registration is put forward and the specific steps of algorithm are described. At the same time, the defects of template matching algorithm are analyzed. Finally, the algorithm of template matching has been improved to optimize the registration time. The experimental results show that the time used by this algorithm is half of the time used by the original template matching algorithm.
Design of Low-Noise, High-Density Signal Intelligent Detection System
Authors: Yang Xiaoan
Published: August 2013

Using motion state of the equipment transducer to determine the presence of a weak signal is a common method of signal detection, whose core is to determine the system's phase change. There a many traditional ways to judge phase transition, but most of which have computational complexity and need a large amount of data which make them difficult to apply engineering practices. In order to solve these problems, this paper presents a detection method based on Lyapunov exponent classification with a small amount of data. This approach has some advantages such as requiring fewer observed values, small calculation amount, and able to automatically determine the phase transition without subjective factors involved etc. Experiments show that this method has stable performance, high effectiveness, strong practicality and promotion.
Based on the Airborne SAR - ATI - GMTI System Research
Authors: Zhang Wei Dong , Song Nuan , Wu Yi
Published: August 2013

The actual airborne dual-channel data is disposed to indicate the moving target by ATI. In order to solve the problems caused by the unideal movement in the flight and other engineering factors which influence the GMTI, the paper presents the method to compensate the interference phase base on calculate the phase centroid of every sub-image. Besides, this paper simplifies some data processing to realize the real-time GMTI and improves the efficiency. With this method, the actual SAR data is proceeded to get the targets position and movement parameter. Results prove the validity of the approach.
Model and Simulation of GPS Position Process
Authors: Song Xu Min , Chen Yong
Published: August 2013

The GPS position process was modeled in this paper, considering errors due to atmospheric effect (ionospheric, tropospheric), clock errors of the satellite. The model was validated by simulation.
Research on Fast Diversity and Multiplexing Selection Algorithm for Multi-Antenna Systems
Authors: Feng Nuan
Published: August 2013

The multi-antenna systems employ both diversity and spatial multiplexing, which have a trade off relationship. This thesis is analyzing linear receiver with multiple antenna system of spatial multiplexing, on the premise of providing large information transmission rate and capacity and transmission reliability, giving a quick selection algorithm based on the BER guidelines diversity multiplexing mode. The algorithm is selecting diversity multiplexed mode by less complicated multi-antenna systems, at the same time, sending a small amount of information back to the sender, to achieve the full advantage of multi-antenna systems diversity and multiplexing. This algorithm can make full use of diversity multiplexing MIMO systems, having better transmission performance and low computational complexity.
Intelligent Identification Based on Wavelet Packet Decomposition and Adaptive Particle Swarm Optimization SVM
Authors: Wang Qiang , Ren Li Jing
Published: August 2013

In this paper, a new Intelligent Identification method based on wavelet packet decomposition and APSO-SVM was put forward. As is known the characteristic of pressure drop is nonlinear and non-stationary. The wavelet packet transform can decompose signals to different frequency bands according to any time frequency resolution ratio, the features are extracted from the differential pressure fluctuation signals of the air-water two-phase flow in the horizontal pipe and the wavelet packet energy features of various flow regimes are obtained. The adaptive particle swarm ptimization support vector machine was trained using these eigenvectors as flow regime samples, and the flow regime intelligent identification was realized. The test results show the wavelet packet energy features can excellently reflect the difference between four typical flow regimes, and successful training the support vector machine can quickly and accurately identify four typical flow regimes. So a new way to identify flow regime by soft sensing is proposed.
A Facial Expression Recognition Algorithm Based on Computer Vision
Authors: Guo Lang , Wang Jian
Published: August 2013

Analyzing the defects of two-dimensional facial expression recognition algorithm, this paper proposes a new three-dimensional facial expression recognition algorithm. The algorithm is tested in JAFFE facial expression database. The results show that the proposed algorithm dynamically determines the size of the local neighborhood according to the manifold structure, effectively solves the problem of facial expression recognition, and has good recognition rate.
A New Derivation of TGR with Naked Antenna in Lossy Medium
Authors: Qu Xin Bo , Zhou Bi Hua , Wan Zheng , Shi Wei , Xie Xiao Gang
Published: August 2013

A new derivation of Transient Grounding Resistance (TGR) has been proposed in this paper. Take grounding system as naked antenna in lossy medium, and then get the input resistance of naked antenna in a given frequency based on Helen current integral equations. With inverse Fourier transform, the resistance calculation equations can be translated from frequency domain to time domain. The result can be applied to design a new grounding system and to calculate its TGR .
Analysis on the Compensation for the Demodulated Phase Errors Caused by Sampling Frequency Offset in OFDM Systems
Authors: Xiong Yu Jie , Zang Xiao Fei , Zang Yi
Published: August 2013

Due to the excellent spectral efficiency and inherent resistance to multipath fading effect, OFDM has been widely adopted in Digital video broadcasting-terrestrial (DVB-T). However, as a multi-carrier transmission technique, there is sampling frequency offset (SFO) in the OFDM systems, which will seriously degrade performance of demodulation by resulting in interference between adjacent sub-carriers (ICI) and demodulated phase deviation. In this paper, to achieve correction of phase errors and solve the problem that OFDM signals cannot be correctly demodulated for complex constellation when SFO exists, we propose an adaptive sampling frequency tracking and demodulated phase error compensation scheme based on synchronization symbol information of OFDM signals. Numerical results supported by simulations are provided to show that the proposed scheme in an ADSL environment indicate great performance improvement of demodulation.
A Novel Image Retrieval System Based on Histogram Factorization and Contextual Similarity Learning
Authors: Jayasekara Sivakolundu , Dassanayake Hithanadura , Fernando Anil
Published: August 2013

Image retrieval has been a top topic in the field of both computer vision and machine learning for a long time. Content based image retrieval, which tries to retrieve images from a database visually similar to a query image, has attracted much attention. Two most important issues of image retrieval are the representation and ranking of the images. Recently, bag-of-words based method has shown its power as a representation method. Moreover, nonnegative matrix factorization is also a popular way to represent the data samples. In addition, contextual similarity learning has also been studied and proven to be an effective method for the ranking problem. However, these technologies have never been used together. In this paper, we developed an effective image retrieval system by representing each image using the bag-of-words method as histograms, and then apply the nonnegative matrix factorization to factorize the histograms, and finally learn the ranking score using the contextual similarity learning method. The proposed novel system is evaluated on a large scale image database and the effectiveness is shown.
The Effects of Dechlorane Plus on Toxicity
Authors: Wu Zhong Ying , Huang Lei , Gao Ying Long , Guo Qing Hao , Sun Ye Qing
Published: August 2013

Dechlorane plus (DP) is a world-widely used flame retardant detected in the environment, biota and humans. The potential toxicity effect of DP is not well studied. In this research, mice were fed with DP-containing food. After two weeks, histopathological observation and oxidative stress was investigated in mouse liver. Our results demonstrated that over-dose DP induced inflammatory infiltration, hepatocellular swelling and oxidative stress in the mouse liver.
Minimum Redundancy Maximum Relevance for Analysis of Proteomic Profile
Authors: Yang Xiao Li , Wang Fan
Published: August 2013

We propose a approach to determine features directly based on classification target of proteomic profile, which combines minimum redundancy maximum relevance (MRMR) and support vector machines (SVM). Firstly, the profile are preprocessed through iterative minimum in adaptive setting window (IMASW) and searching window methods for correcting negative intensities caused by manual preprocessing and peak picking. Then, MRMR and support vector machines (SVM) techniques were used to identify biomarkers and build discrimination model. With an optimization of the parameters involved in the modeling, a satisfactory model was achieved for ovarian cancer diagnosis based on proteomic peptide profile dataset. To study the performance of MRMR, we applied two statistical method, t test and Wilcoxon signed-rank test, to identify features. The results show that MRMR method is more efficient.
Research on Aluminum Alloy Foam Sound Insulation Characteristics of New Decorative Building Materials
Authors: Yang Ying
Published: August 2013

Due to its unique physical sound insulation performance, aluminum alloy foam has become one of the new decorative building materials. Research on its sound insulation performance has also become a hot topic of materials science and other fields. Firstly, the paper analyzes the acoustic characteristics and the analysis indicators of sound insulation materials through the analysis of aluminum alloy foam characteristics and sound insulation mechanism. It finally concludes impact factor of sound insulation based on the analysis model of physical characteristics of aluminum alloy foam and sound insulation mechanism which provides a theoretical basis for the application and development of the sound insulation materials in a certain extent.
Waterborne Epoxy/Alkyd Resin Insulation Coatings Modified by Siloxane
Authors: Gao Jun Gang , Wu Xiao Jing , Tian Cong
Published: August 2013

The epoxy resin (ER) and 2,3-epoxypropoxypropytrimethoxysilane (KH-560) were used to prepare alkyd resin (AR) insulating coating. The modified waterborne alkyd resin insulating coating was prepared. The dynamic mechanical properties, thermal properties and electrical properties of the composites were characterized by DMA, TG, et al. The results show that the tertiary amine has a good catalyzing effect for this reaction. When the mass ratio of AR with ER is 1 : 1, the glass transform temperature Tg of material is 64.6 °C. When the content of KH-560 is 5% mass fraction of the alkyd resin, the Tg of composites increase 5.6 °C, the initial degradation temperature increased by 63.78 °C; The rs and rv of composites are between 109 ~ 1012 MΩ; the ε and tanδ is between 0.6553 ~ 0.9975 and 0.0025-0.0036, respectively. The pencil hard degree and the impact strength of coating film are all over 5H and 40N, respectively.
Evaluation of the Stability and Precision of Powder Delivery during Laser Additive Manufacturing
Authors: Zhang Kai , Wang Lei , Shang Xiao Feng
Published: August 2013

The fabrication of metal parts is the backbone of the modern manufacturing industry. Laser forming is combination of five common technologies: lasers, rapid prototyping (RP), computer-aided design (CAD), computer-aided manufacturing (CAM), and powder metallurgy. The resulting process creates part by focusing an industrial laser beam on the surface of processing work piece to create a molten pool of metal. A small stream of powdered alloy is then injected into the molten pool to build up the part gradually. By moving the laser beam back and forth and tracing out a pattern determined by a CAD, the solid metal part is fabricated line by line, one layer at a time. By this method, a material having a very fine microstructure due to rapid solidification process can be produced. In the present work, a type of direct laser deposition process, called Laser Metal Deposition Shaping (LMDS), has been employed and developed to fabricate metal parts. In the LMDS process, the powder delivery system is an important component to perform the powder transport from powder storage box to powder nozzle, which supplies the raw material for the as-deposited metal parts. Consequently, the stability and precision of powder delivery during LMDS is essential to achieve the metal parts with high quality, so it is critical to evaluate the main factors closely related to the stability and precision of powder delivery. The shielding gas flow and the powder feeding rate were ascertained through experimental measure and formula calculation. The results prove that the suitable shielding gas flow and powder feeding rate can promote the stability and precision of powder delivery, which is the basis for the fabrication of as-deposited metal parts with flying colors.
A Study and Discussion on Defects Classification of Electrode Coating of Li-Ion Power Battery
Authors: Han Liang , Lu Wen Zhou , Liu Yong Ming , Shen Jian , Hao Ya Fei , Xiao Feng
Published: August 2013

The serious pollution of lead-acid battery and nickel-cadmium battery prompts the Li-ion power battery to become the new alternative battery. As the main body of the Li-ion power battery, the electrode has a great influence on performance of the battery. Thus it is necessary to classify, analyze and research the defects of the battery electrode precisely. Combining with the practical situation of production, in this paper the characteristics of the electrode defects of Li-ion Power battery are described in detail and morphological characteristics are analyzed, which is helpful to the subsequent image processing and the production practice.
Industrial Synergy Mechanism and Operation Mode Research Based on the Retail Industry
Authors: Min Hai Qiang , Xu Chen
Published: August 2013

In recent years, the rapid growth of commerce has led the upgrade of retail, real estate development mode. In the process, the trend of synergy development among retail, real estate and finance has been more and more obvious. In this paper, we analyzed the causes of the synergy development from three aspects, retail, real estate and finance industry. And through the compare of operation mode, we derived that multi-agent collaborative mode was more suitable for Chinas retail industry.
Research on Measures to Promote Mechanical Safety
Authors: Liu Wen Long , Zhang Hong
Published: August 2013

Mechanical Safety is very important in safety production. Not only China, but all over the world, the machinery safety issues are still in study. Safety becomes more and more important nowadays. So, to ensure the mechanical safety is not ones responsibility but all society. Measures must be taken jointly by the government, social organizations, enterprises and technical institutes to maintain the machinery safe. Government should develop the safety standards, the same as certification for social organizations. For enterprises, they must ensure that mechanical products meet the safety requirements. Strengthen the safety management in production process is the responsible of technical institutes. Together through a series of measures to make the mechanical safety situation has a good development in China.
The Instantaneous Optimal Control Strategy of Parallel Hybrid Loader
Authors: Zeng Xiao Hua , Bai Ge , Wang Jin Xin , Zhou Zhen Ping
Published: August 2013

In this paper, the instantaneous optimal control strategy of parallel hybrid loader is presented. The aim is to achieve the real time optimal allocation of internal combustion engine (ICE) torque and motor torque in any driving cycle for loader. Thus, all combinations of the ICE torque and the motor torque is determined in any demand torque. Then integrated instantaneous fuel consumption (IIFC) is calculated as a target function, by establishing the equivalent relationship between the electric energy consumption of battery and the fuel consumption, which is converted to the electric energy. When the minimum integrated instantaneous fuel consumption is found, the instantaneous optimal allocation of ICE torque and the motor torque is achieved. Finally in order to verify the functionality of the control strategy, the vehicle and the control algorithm co-simulation model is built on AMESim and Matlab/Simulink platforms. The simulation results show that the strategy is able to improve the fuel economy by more than 10% while ensuring the vehicle power performance.
Design on Sports Meeting Management System of University Based on .NET Framework
Authors: Wang Ai Bo , Ma Hong Tao , Li Xun
Published: August 2013

Information management is an indispensable part of modern sports meeting management, is to adapt to the requirements of the modern sports meeting management, and promote the sports meeting management to the scientific, standardization of the necessary conditions. According to the status of sports meeting management of university, this paper design is based on .NET Framework Management System. First, according to the software development process has carried on requirement analysis, function design, and database design. Requirement analysis is mainly carried on function analysis and performance analysis, Function design is designed in the description of the basic functions of the system function structure model, database design concept of structural design and the physical structure of the design. Then, research the .NET Framework Application, mainly research .NET Framework two components .NET Framework class library and Common language runtime. The content of this paper for the university build sports meeting management system provides a practical solution.
Integrated Scheduling Optimization of Handling Operations in Container Terminal
Authors: Qian Ji Feng , Zhu Xiao Ning , Liu Zhan Dong
Published: August 2013

In order to improve the efficiency of the handling operations equipment in container terminal, reduce the waiting time of container ship in Port, this paper researches the integrated scheduling of the different types of handling equipment in container terminal, considers the constraints of different handling equipment impact between each other, build a mixed integer programming model, presents a heuristic algorithm for the of the scheduling problem and gets the approximate solution. The results show that the integrated scheduling can effectively reduce the time of the ship staying in port, and improve the overall operating efficiency of the port.
Magnetic Field Effect on the Binding Energy of a Hydrogenic Donor Impurity in Cylindrical Quantum Ring
Authors: Wang Guang Xin , Duan Xiu Zhi
Published: August 2013

The binding energy of a hydrogenic donor impurity in cylindrical GaAs quantum ring (QR) subjected to an external magnetic field is calculated within the effect mass approximation using variational method. The binding energy as a function of the QR size (the inner radius, the outer radius), the impurity position and the applied magnetic field is investigated. The results demonstrate that the ground state binding energy behaves as an decreasing function of the outer radius, and the magnetic field. Likewise, the binding energy is an increasing function of the inner radius. The binding energy firstly increases and then decreases with shifting the impurity ion from the internal surface of the QR to the external surface, indicating that there is a maximum.
The Quantuam Melting Transitions with the Magnetic Field in Weakly Disordered Josephson Junction Arrays
Authors: Zhao Zhi Gang , Dai Cun Li , Zeng Lun Wu
Published: August 2013

Using the resistively shunted junction model, we study the magnetic field induced dynamic melting transitions of a current-driven vortex system in two-dimensional weakly disordered Josephson junction arrays at zero temperature. From the unified model simulations, we find that the intrinsic quantum vortex liquid (QVL) phenomenon, which consistent with the recent experimental reports in disordered and superconducting MoGe films. The enhancement of critical current in the QVL phase arises from intrinsic quantum fluctuations in the moving vortex flow.
Research on the Optimization of Flexibility Selection of Limb Aesthetics in the Dance Movements Based on Dynamics and Geometry Morphology
Authors: Yu Gui Lin
Published: August 2013

With the improvement of the quality of life, people start to pursue after some artistic beauty of spiritual level. It is particularly hot to manifest body language in the aesthetics. As an art form of body language, we focus on this form of limb aestheticst, and dance is still rare both at home and abroad .Some standardized regulations of dance moves are investigated in the current dance training ,which is demanded in the world of dance very urgently. This paper researches on the real problem that dance moves flexibility in dance training through the mathematical geometric principles. We hope this research will make the dance moves in dance training more in line with the current limb aesthetics, and perfect the blank of this field in domestic. Meanwhile, we hope that this research method can provide some reference for the other domestic aesthetic research on body language ,and make some contribution to the development of the domestic arts.
Seamless Integration of CAM/CNC Based on STEP-NC
Authors: Jiang Ke Rong , Feng Min Liang
Published: August 2013

Integration of computer-aided design (CAD) and computer-aided manufacturing (CAM) have been extensively studied by the people both in academia and industry during the last few decades. Because of fluency of information flow achieved by taking the same data model, advantages brought from integration of CAD and CAM are obvious, such as cost savings and improved efficiency. However, another impediment about information flow still exists between CAM and Computerized Numerical Control (CNC). The data model used in the planning department is quite different to the G codes (ISO 6983) used on the shopfloor. This means that the translation of the data format is inescapable, moreover, any information added or modified by the operator on the shopfloor cannot be fed back to the planning department. a two-directional interface between CAM and CNC. Integration of CAM and CNC based on STEP-NC can be realized seamlessly.
The Research of Magnetic Levitation System Based on Fuzzy Sliding-Mode Control
Authors: Song Rong Rong , Chen Zi Li
Published: August 2013

This paper develops a sliding-mode controller with fuzzy rules for the single magnetic levitation system with delay, different signals and interference. The control algorithm comprises a sliding-mode controller which is designed for enhancing robustness when plant uncertainties, and a fuzzy controller which is designed for smoothing the control input when switching at these boundary manifolds. An algorithm is presented for selecting the coefficients of the swithing plane such that the overall closed-loop system has stable eigenvalues. A control input is shown to be smoothing and overcome the chatter. The performance of the single magnetic levitation system is obtained by simulation and experimental results which show that the proposed fuzzy sliding-mode controller algorithm is effective for tracking different signals with interference.
Accuracy of Four Parallel Manipulator
Authors: Han Shu Kui , Li Hua , Dong Xu
Published: August 2013

The Due to the error, parallel manipulators always exhibit some position and orientation errors at the mobile platform. The analysis of accuracy is carried out to find the source errors which affect the pose accuracy of the end-effecter in terms of the error model. The accuracy synthesis is implemented to obtain the geometry tolerance of the major parts affecting the uncompensable pose error. In order to finish these works, one method is proposed, which can also be used to handle the similar mechanism
The Design and Implement of the System of the Airport Luggage's Automatic Matching by Using the RFID Technology
Authors: Yu Qin , Chen Qing Zhang
Published: August 2013

The passengers' luggage checking not noly often make the airport staff embarrassed, but also not easy to locate accurately, which often affects passenger evacuation and causes unnecessary disputes. Most of the airport use fixed manual sorting or the technology of barcode, using these methods, however, which greatly affect the quality of services at the airport. This paper presents a system based on radio frequency identification technology (RFID) to achieve luggage matching automatically. In the system,RFID luggage tags will be attached to the target luggage, and the RFID tags which match with the target luggage will be built into a special boarding cards. Only the two RFID tags matching, passengers can freely leave the door in the exit. In order to solve the problem of overcrowding in the luggage claim, this paper proposes to install the LED prompt lights and luggage tracking devices in the U-shaped turntable to improve the accuracy of the luggage claiming. The system provides a new method for airport luggage positioning and management, which be proved of high efficiency, low error rate with some advanced and practical.
Research of Ultrasonic Thickness Measurement Method Based on the Pulse Reflection Type
Authors: An Min , Sun Jie , Zhang Yin Yang
Published: August 2013

The thickness measurement and monitoring of all kinds of equipment and parts, especially making general investigations on the thickness of boiler, pressure vessel and pipelines regularly, monitoring their thinning after corrosion in the process of using, and ensuring the safety production have attracted more and more attention among the companies. Based on the thickness measurement principle of pulse reflection type ultrasonic, the measurement method of the steel plate thickness was studied, and AVR Atmega16 single chip microcomputer as control chip was used. The analysis and comparison of ultrasonic transmitting circuit, receiving circuit, amplifying circuit, LCD display circuit, keyboard circuit, communication circuit, counter 232 AVR Atmega16 line were also included. The performance of this system regarding the steel plate as sample was tested, and then the data and the causes of measurement error were presented.
Influence of Fuel Supply Advance Angle on Fuel Economy of Diesel Engine with Ethanol–Diesel Blend Fuel
Authors: Wu An Kang , Zhu Hua , Lu Ke Jiu
Published: August 2013

The test on the influence of changing fuel supply advance angle on fuel economy was carried out on single cylinder diesel engineseparately using diesel fuel and ethanoldiesel blend fue1. The test result shows that the influence is more sensible when the ethanoldiese1 blend rue1 is used, and it is beneficial for increasing the fuel economy to reduce suitably fuel supply advance angle.
Reliability Compliance Test Method Research for Wind Turbine
Authors: Guo Hong Che , Dai Lu Ping , Ding Chao Yi
Published: August 2013

The reliability model and test method of wind turbine is described in the paper. According to the characteristics of wind turbine product, a truncate sequential compliance method for reliability test is designed, and it is given an example for 1MW wind turbine. The example shows accumulating more before-test experience and decreasing the experiment time appropriately wont result in the reduction of the reliability.
The Impact on the Voltage Fluctuation of Wind Power Integrated Separately in Chongqing Distribution Network
Authors: Peng Hui , Li Sheng Fang , Li Ya Jun , Li Yuan Yuan , Ding Jian , Zhang Xin
Published: August 2013

Recently, the development of Chinese wind power generation has formally entered the strategic transformation stage with the combination of large-scale integrated exploitation and distributed access exploitation. It is suitable to adopt distribution access mode due to the characteristics of Chongqings planning wind farm including small generation capacity and distributed location. However, considering that most of planning wind farms are located in the mountain area of northeast and southeast Chongqing with the large-scale geographic area and small load request and the distribution networks are relatively weak, there may be remarkable effect on quality of electric energy even though the distribution access mode is adopted. In this paper, aiming at the voltage fluctuation of access point, the relationships among variables affecting the voltage fluctuation is analyzed, then taking two planning wind farms in northeast and southeast Chongqing respectively as examples, the effects of voltage fluctuation caused by different access points are calculated and analyzed in order to get the allowed maximum capacity of wind farms fitting national standards. In the end, the proposals relevant to the development of wind power and contribution of distribution network are submitted according to the case results.
The Study of Wind Turbine Based on Fuzzy Logic
Authors: Huang Yue Hua , Li Qian Cheng , Chen Chen , Peng Na , Duan Zuo Dong , Guo Fang
Published: August 2013

Due to the lack of fossil fuels, people are paying more and more attention to renewable energy. Wind energy is one of the important renewable energy. Unpredictability and volatility of the wind source make the output power unstable, so we need to control the active Power. This paper uses fuzzy control method, and the simulation results show that fuzzy control method mentioned in this paper is better than the conventional PI control for Wind power, the nonlinear system. Based on the analysis of pitch control theory and control process, we design fuzzy pitch controller and its model. We simulates gust wind speed imitates, wind turbine control and verifies the effects of the blur pitch control in a constant speed and constant frequency wind power generation system. According to the results of the simulation, we know the pitch controller of fuzzy logic has a better effect on the active control of the generator of the wind power generation system.
Backup Protection for Six-Phase Transformer Based on Six-Sequence Components
Authors: Wang Hai Jiang , Zhang Yan Xia , Deng Zhong Yuan
Published: August 2013

The six-phase transmission can improve the power transmission density of the transmission lines effectively, and save line corridor. To save the problem that the sensitivity of the traditional transformer backup protection is low in six-phase transmission system, a backup protection for six-phase transformer was proposed. An over-current protection criterion is proposed for interphase short circuit and opposite zero sequence over-current protection criterion is proposed for ground faults, based on the six-sequence components relationship, and the existence of six-sequence components in different fault types. Theoretical analysis and EMTDC simulation experiments prove that the scheme is feasible.
A Novel Approach for Time Registration of Multi-Radar Data
Authors: Yu Hong Bo , Wang Guo Hong , Cao Qian
Published: August 2013

To address the problem of data non-synchronization to multi-radar, a new time registration approach is presented in this paper, in which the data is synchronized using Kalman based Newton interpolation (KNI). In this work, a preliminary alignment is firstly implemented with Newton interpolation, providing a dummy measurement at each time step. Secondly, the Kalman filter is followed, in which the measurement innovation is generated by the dummy measurement. And within the framework of Kalman filter (KF), the data is synchronized into the datum step. Thus, using the most of recent measurements, this new proposed method can realize the synchronization of multi-radar data and as a result, improve the performance of data fusion and target association. An application example is given to draw a comparison between this new algorithm and the existing algorithm. The simulation results show the efficiency of this algorithm.
3-D Research about Walfisch-Bertoni Model
Authors: Chen Jie , Shen Dong Ya , Yao Na , Zhang Ren
Published: August 2013

Walfisch - Bertoni model is used to predict the average signal field intensity of the main street. The model considers the path loss of the free space, diffraction loss along the path, and the influence of the height of the building. There are six City parameters in Walfisch - Bertoni model influence communication quality. In this paper, the researches about path loss and its characteristics is under the case of considering two city parameters at the same time. Facts have proved that this case is more close to the actual that the wireless signal propagation environment. This paper mainly researched the path loss, probability density function (PDF) and cumulative distribution function (CDF) of the path loss.
Distributed Group Key Management for Secure Electronic Communication
Authors: Niu Qiu Na
Published: August 2013

With the popularity of group-oriented applications, secure electronic communication among all group members has become a major issue. This paper proposes a distributed group-oriented key management scheme for secure electronic communication. The scheme deploys Elliptic Curve Diffie-Hellman (ECDH) which is more lightweight as compared to regular Diffie-Hellman. According to the security analysis, the proposed scheme provides a number of desirable security properties, including group key secrecy, forward secrecy and backward secrecy.
Wireless Sensor Network Localization Based on Semi-Supervised Local Subspace Alignment
Authors: Chen Jing , Liu Yang
Published: August 2013

A semi-supervised local subspace alignment (SSLSA) algorithm for wireless sensor networks localization is presented. SSLSA method has the following features: 1) only using pair-wise distance between each node and its neighbors within a certain communication range, 2) aligning subspaces with the constraints of anchor nodes thus avoiding the accumulation of error, and 3) obtaining absolute positions of all sensor nodes directly without any other transformation process. The localization performance of this method is compared to the MDS-MAP(P, R) and LSA methods.
A Novel Learning Evaluation Method Based on RBF Neural Network
Authors: Yu Fa Hong , Chen Mei Jia , Liao Wei Zhi
Published: August 2013

There are many learning evaluation methods, but most of them are subjective, which contains a lot of man-made factors. This paper presents a new learning evaluation method based on radial basis function (RBF) neutral network. By analysis the orthogonal least squares for RBF and determines the center of the basis functions, the model of RBF neural network was constructed. Experimental studies show that the Method Based on RBF Neural Network is effective for learning Evaluation.
Experimental Study on Fatigue of Metal Rubber Vibration Isolator under Pulsating Cyclic Stress
Authors: Yan Hui , Zhang Wen Jing , Jiang Hong Yuan , Chen Liang
Published: August 2013

Metal Rubber(MR) vibration isolator is a new type of isolator developed to overcome the fatal aging phenomenon of current rubber isolator. It has broad practical application in the military, such as aerospace. In this paper, the fatigue life experiment is conducted to MR vibration isolator, and resonant frequency and resonant accelerate transmissibility are chose as degradation parameters. It’s found that MR vibration isolator possesses jump phenomenon; resonant frequency and resonant transmissibility increase quickly to the maximum, then attenuate slowly with the increasing number of vibration. This provides fundamental basis for the design and application research of MR vibration isolators.
The Research and Development of Digital Factory Integrated Information System for Discrete Manufacturing Enterprise
Authors: Wang De Quan , Liu Chuang , Ding Jin Hua , Gao Teng , Ji Tian
Published: August 2013

According to the characteristics of the discrete manufacture enterprise, analyze the existing problems in modern enterprise of production process , Develop a digital factory integrated information system which is suitable for manufacturing enterprise , Put forward the necessity of PDM/MRP/ERP for manufacturing enterprises , MES system is analyzed emphatically in the digital factory integrated information system which is of great importance and indispensability, Digital factory integrated information system adopts modular development technology, And have applied in some manufacturing enterprise.
Study on Optimal Scale and Layout of Electric Vehicle Charging Stations Based on Chaotic PSO Algorithm
Authors: Qi Can , Wen Ya Feng , Yang Duo , Liu Wei , Wu Guo Liang
Published: August 2013

The index of investment cycle cost (ICC) and users convenience of electric vehicles are presented. Based on the aim to minimizing investing unit and user fees, fix a charging station model in scales and layouts. ICC consist initial investments, cost of network losses and investments for new transmission lines. Convenience is measured by electrical power consumption expense from users to the charging station. Adding constraint of grid security and economical efficiency, the optimization aim function was set which comprehensively considers investors and users cost and operation of power grid. Chaos Particle Swarm Optimization Algorithm (CPSO) was used to settle it. By empirical study of certain planning area, the proposed model and algorithm are proved to be scientific and effective.
New Feedback Optimization Method Based on Arithmetic Sequence for an Extended LED Source
Authors: Shi Zhi Wei , Yan Guo Dong , Deng Guo Qiang , Luo De Han , Wang Qin Ruo , Liang Ming Juan , Zhu Bing Zhong
Published: August 2013

A new feedback optimization design method based on arithmetic sequence is proposed to design free-form optical systems for an extended LED source. Taken LED lens designed by this method as an example, we find that the design process is simple and high regional illuminance uniformity and high light output efficiency could be simultaneously achieved.
Experimental Investigation of the Water-Based Fog Screen System in Photoelectric Interference
Authors: He Yue Jun , Ren Bao Lin , Xu He Gang , Hua Wang , Li Chun Heng
Published: August 2013

The water-based fog screen system for photoelectric interference, with low cost, energy-saving and environmental features, is a new type of interference material. This article describes and investigates the physical characteristics of the water-based fog screen, the principle behind the interference of visible light, infrared and other electromagnetic waves using mist, the composition of the water-based fog screen system and its significance in military applications.