bluuebunny/crossref_metadata_2025 huggingface dataset:
An Improved Edge Extraction Algorithm for Lithography Micrographs
Authors: Gong Shan Shan , Li Mu Jun
Published: July 2012

For shape error analysis and correction of micro-structure in lithography, image edges should be extracted from micrographs of the structures. First several basic image edge detection algorithms are analyzed and compared. Then according to the unique conditions of micrographs in lithography experiments, an improved image edge extraction method is investigated. In this method Canny operator is selected as a basic algorithm, while the mathematical morphology is used in pre-processing for de-noising to reduce the uneven phenomenon. And an appropriate enhancement algorithm is used to enhance image contrast. Experimental results show that this method can extract the image edge from the micro-structure graphs effectively.
Design of Long-Distance Pipeline Remote Monitoring System
Authors: Wu Jin
Published: July 2012

This article describes the design of the long-distance pipeline system, then gives out the overall framework of the remote monitoring system consisting of server and client machine, the serial communication program design methods, and the functional modules of the client machine. After analyzing the pipeline simulation model the conclusion is made.
Research of Wireless Routing Protocol Used in Underground Wireless Gas Monitoring Network Based on Star-Bus Topology and Non Protocol Stack
Authors: Shen Bin , Liu Xin Lei , Qin Xian Li , Fu Ming Chao
Published: July 2012

In order to realize the application of the underground wireless monitoring network, in view of the characteristics of the underground wireless monitoring, a kind of multi jump wireless routing protocol based address priority and star-bus topology is designed in this paper. After the analysis of the mine wireless transmission process model and data broadcast problem, considering the technologies of direction control, second localization, the anti-interference, network survival period and so, a method of adding the protocol address and the uplink and downlink flag is proproesd to solve these probles above. Simulation results show that, this protocol can be successfully completed the wireless datatransmission in the underground laneway environment.
Numerical Investigation of Fine Blanking of a Helical Gear
Authors: Yang Shan , Hua Lin , Song Yan Li
Published: July 2012

Fine blanking, as an effective and economy metal forming process, can be used for the manufacturing of helical gears with inclined forming movement. In the present study, a reliable three-dimensional (3D) rigid-plastic finite element (FE) model is developed on the DEFORM-3D platform for rotational fine blanking of a helical gear. Based on this FE model, distributions of different field variables such as metal flow velocity, mean stress and effective strain are obtained, and cut surface features and punch stroke curve are predicted. The results achieved in this study can not only evaluate the capabilities of the rotational fine blanking process of a helical gear, but also provide valuable guidelines and a better understanding of the deformation mechanism of this process.
Stress Analysis of Tubular Turbine Based on Fluid-Structure Coupling
Authors: Zhang Fu Xing , Zheng Yuan , Yang Chun Xia , Jin Xiang Long , Ding Lin
Published: July 2012

A brief introduction of fluid-structure coupling and its classification were given, then according to the solving characteristics and application conditions of different coupling methods; sequential coupling method is chosen to calculate the stress distribution of a tide power plant tubular turbine. Stress calculations of the tubular turbine were conducted under the maximum water head, the designed water head, the average water head and the minimum water head working conditions in ANSYS Workbench. The research shows that in all of the four calculated working conditions, the maximum equivalent stress of the runner is located at the connection between the blades and the hub where stress concentration is obvious; the maximum deformation of the runner lies in the outer edge of the blades and the deformation increases from the root to the outer edge; the maximum equivalent stress of the guide vane is located at the root and the maximum deformation lies in the outer edge. The maximum value of maximum equivalent stress of the runner and the guide vane occurs on the maximum water head working condition, whereas it is far less than the material yield limit, which means that static stress will not lead to the cracks of the blade or the guide vane. But it is still necessary to avoid stress concentration appearing periodically in case it causes fatigue failure.
Videogrammetry of the Model’s Attitude in Wind Tunnel Testing
Authors: Zhang Zheng Yu , Sun Zhong Xiang , Huang Xu Hui , Sun Yan
Published: July 2012

The advanced precision of drag coefficient is 0.0001 for the high speed wind tunnel test of measuring forces, the model’s angle of attack precision is ≤0.01°following errors distribution. A videogrammetric method of model’s attitude is therefore proposed, its uncertainty is investigated, and a compensation method of its systematic error is also presented by this paper. The three engineering videogrammetric experiments of attack angle in 2 meter supersonic wind tunnel testing have demonstrated that measuring standard deviation of videogrammetric measurement system established by this paper is ≤0.0094°, in addition it neither destroys the model’s shape, nor changes the stiffness or strength, so it is useful and effective.
Studies on Dynamic Characteristics of Main Shaft for TM Electronic Jacquard Machine
Authors: Chen Feng , Zhang Wei
Published: July 2012

The integrated transfer matrix method is brought forward on the basis of transfer matrix method and integrated transfer matrix theory is applied to the analysis on the dynamic characteristics of the main shaft for TM electronic jacquard machine. Through analysis on the dynamic model of the main shaft, the critical speed and the vibrating model of the main shaft for the high-speed electronic jacquard machine are derived theoretically and calculated and the first several order natural frequencies and the corresponding main vibration models of the main shaft are found. It is shown from the comparative analysis of the calculation results that the integrated transfer matrix method with higher computation accuracy can keep the characteristics of transfer matrix method such as simple programming, small computation amount and fast operation speed. This analysis and calculation method has higher reference value to the design of the main shaft of other types of jacquard machine and the dynamic analysis of similar complex rotor system.
Effect of Mass Flow Rate of Working Fluid on Performance of Capillary Porous Wick Evaporator with Bayonet Tube for AMTEC
Authors: Wu Shuang Ying , Cao Bao Xi , Xiao Lan , Li You Rong
Published: July 2012

An axial symmetric invariable temperature phase change interface model is established to investigate numerically the effect of mass flow rate of working fluid on performance of capillary porous wick evaporator with bayonet tube for alkali metal thermal-to-electric converter (AMTEC) system. The numerical results reveal that the temperature of working fluid in the wick and liquid channel decreases with increasing the mass flow rate. The suitable structure of bayonet tube is dependent on the mass flow rate of working fluid. The bayonet tube having larger wall thermal resistance is selected for the smaller mass flow rate of working fluid, and vice versa. Also, the flow in the liquid channel is greatly affected by the mass flow rate of working fluid in comparison with the capillary porous wick evaporator without bayonet tube.
Effects of Sb Addition on Heat-Treated Microstructure and Mechanical Properties of AZ61-0.7Si Magnesium Alloy
Authors: Yang Ming Bo , Li Hong Liang , Cheng Ren Ju , Hu Hong Jun
Published: July 2012

In this paper, the effects of Sb addition on heat-treated microstructure and mechanical properties of AZ61-0.7Si magnesium alloy were investigated. The results indicate that the solution heat treatment can modify the Chinese script shaped Mg2Si phase in the AZ61-0.7Si alloy. After solutionized at 420°C, the morphology of the Mg2Si phase in the AZ61-0.7Si alloy changes from the Chinese script shape to the short pole and block shapes, and the higher modification efficiency could be obtained for the alloy with the addition of 0.4 wt.%Sb. In addition, the effect of the solution heat treatment on the morphology of the Mg2Si phase can also result in the improvement of tensile and creep properties for the AZ61-0.7Si alloy. After solutionized at 420°C for 24h and followed by aging treatment at 200°C for 12h, the AZ61-0.7Si alloy exhibits higher tensile and creep properties than that of the as-cast alloy, and the properties improvement resulted from heat treatment, is more obvious for the AZ61-0.7Si alloy with the addition of 0.4 wt.%Sb.
Optimization of Valve Block Shape Using CFD
Authors: Yang Qin , Wang Xian Zhou , Liu Ming Yue , Hu Jing , Zhang Zhi Guo
Published: July 2012

Stop valves are commonly used as fluid flow control equipments in many engineering applications. A numerical study of a three-dimensional, complex geometry, stop-check valve was performed for model validation and improved understanding of valve flow features. This paper has provided a numerical investigation of the fluid flow inside a stop valve, including the modeling and the simulation of the stop valves. According to the simulation result of original valve structure, two cone valve block shape with different gradient are presented to bring some optimization to the stop-valve. CFD simulations were conducted for different structure of the valve to verify the performance of the valve after redesign the internal flow structure. The simulation results show that the pressure drop vortex strength, maximum velocity and velocity nonuniformity of valve outlet had been reduced obviously. Furthermore, the results of the three-dimensional optimization analysis of valve shape can be used in the design of low noise and high efficiency valve for industry.
Research on Production Quality Control and Efficiency Measurement Based on DEA-Benchmark Model
Authors: Yang Yin Sheng , Guo Chang Qing , Cheng Yun , Yang Jun
Published: July 2012

With rapid development of science, technology and economy, requirements of production quality control were more and more stringent. A new method to solver the problem was given in this paper. First we made up the index system of production quality control. Second the steps of the DEA-Benchmark model which was derived from deviation DEA model were put forward. At last, applying the model, we measured the quality of ten varieties of production.
Research on Production Scheduling Method and the Application in Switch Machine Production Enterprise
Authors: Chen Jian Qing
Published: July 2012

This paper is under the research background of a switch machine production enterprise informatization projects, and the production schedule is mainly based on customer orders and sales forecasts. This paper mainly studies the combination of similar order processing sheets according to the similarity of types and specifications of products in an order processing sheet, and the experience of master production scheduling personnel, to generate the master production scheduling methods and techniques. Finally, studies the material requirements planning methods based on nested components, focusing on the configuration of parts and components of such products in the product configuration.
The Solution of the Dynamics Prediction of Aircraft State
Authors: Zhao Xiu Ying , Quan Ji Cheng , Wei Jing Yuan , Liu Yu , Chen Ke Xiong
Published: July 2012

To monitor aircraft flight status, predict the position of aircraft is needed. By the research of the kalman filter, particle filter, and the best curve fitting method, use the last before time or several before moments‘s flight state data to predict the state of the aircraft, even forward time’s state, the dynamically weighted average of the multi-times data can get to the aircraft status data and subsequent flight status data, so the aircraft fly normally and smoothly with the predicted status data, that can get a good visual effect. The algorithm experiment is through the extraction data from the real aircraft data, the average relative error is 0.03%.
Using Contextual Words for Object Detection
Authors: Guo Jun , Zhu Chang Ren
Published: July 2012

Recent work has shown that classification can benefit saliently from the proper use of contextual cues. In this paper, we present a novel framework by using contextual information to improve object detection. After having detected objects and clustered image regions respectively, we make the statistic spatial relationships between candidate objects and sub-regions of the image, which are composed into a vector of features (termed contextual words). Then, the vectors of all candidates are used to train the probabilistic Latent Semantic Analysis (pLSA) model. Finally, SVM classifier is employed in object classification. Furthermore, a new direct graphical model by extending pLSA is proposed to introduce more useful information from previous detection process. The experimental results based on a remote-sensing image dataset show that our performances are quite promising.
An Ultrasonic Knife System for MEMS Packaging
Authors: Sha Jin , Yao Zhi Yuan , Jiao Yang
Published: July 2012

This paper proposes an ultrasonic knife system for MEMS packaging. The ultrasonic knife system is consisted of an ultrasonic transducer, a cutter and a gripper feeder. The ultrasonic transducer engenders high frequency vibration, which lead to the resonance of the structure. Amplitude transformer can magnify the amplitude. By the impact and collision of the cutter, the material can be cut through, and the high temperature created by high-frequency vibration can do the welding. The structure is designed and optimized by the finite element method, and a model machine is produced. According to the experimental results, the ultrasonic knife system has the virtues of high cutting force and better wedding feature, which are suitable for MEMS packaging.
Application of Hard C-Means and Fuzzy C-Means in Data Fusion
Authors: Tang Ai Hong , Cai Lian , Zhang You Mei
Published: July 2012

This article describes two kinds of Fuzzy clustering algorithm based on partition,Fuzzy C-means algorithm is on the basis of the hard C-means algorithm, and get a big improvement, making large data similarity as far as possible together. As a result of Simulation, FCM algorithm has more reasonable than HCM method on convergence, data fusion, and so on.
Application of SLP Method in Design of Facilities Layout in Workshop
Authors: Li Ze Rong , Qin Li , Cao Zhi Qin
Published: July 2012

Through analyzed the current situation of a production workshop ,the author finds out some existent problems.To solve the problems ,designs the facilities layout by using the Systematic Layout Planning(SLP) methed combined with the actual situation workshop,so as to achieve the purpose that shorten logistics path, expand work area,material handling smoothly,and improve the production efficiency.
Non-Negative Matrix Factorization Based on Double Sparsity K-SVD
Authors: Hong Zheng , Zhen Li , Zhao Li
Published: July 2012

This paper presents a novel non-negative matrix factorization algorithm based on double sparsity K-SVD. It keeps the good parts-based representation. And meanwhile it has a well sparsity as sparse coding. The influences given by different initialization condition have been successfully overcome. Compared with other algorithms, the algorithm proposed is much faster. This dissertation demonstrates the advantages of the proposed algorithm by simulator experimentation.
Discrete Element Method Analysis of Mechanical Properties of Railway Ballast during Tamping Process under Different Vibration Frequency
Authors: Zhou Tao Yong , Hu Bin , Wang Xue Jun , Yan Bo
Published: July 2012

Railway ballast tamping operations is an important work in the line maintenance and repair operations, the selection of tamping parameter is usually dependent on field trials and practical experience, for lack of theoretical basis. This paper creates discrete element analysis model of railway ballast using the discrete element method, the numerical simulations are carried out to study the mechanical properties of railway ballast during tamping process. We focus on the influence of vibration frequency during tamping process; an optimal vibration frequency of the simulation analysis is obtained and compared with the recommended vibration frequency of Plasser & Theurer Company, it is found that the two vibration frequencies accord. This result verifies the correct validity of the discrete element analysis model of railway ballast during tamping process.
Finite Element Model Simplification for the Stator Component in the Hydraulic-Bulging Assembly Process Simulation
Authors: Liu Hua Han , Jiang Wei
Published: July 2012

In this paper, the hydraulic-bulging assembly process for the stator and can is simulated by using ABAQUS/Explicit. Five different models of the stator and can component were developed. The processing parameters are analyzed and compared based on the simulation results. The simplified model with higher precision and less computational time is attained and will be used in the future process optimization.
A Physical Model for Self-Emitting Magnetic Signals during Fatigue Crack Propagation
Authors: Dong Li Hong , Xu Bin Shi , Wang Hui Peng , Xue Nan
Published: July 2012

It has previously been reported that when a fatigue crack grows in ferromagnetic materials, abnormal magnetic signals are spontaneously emitted, which can provide a powerful tool for fatigue crack life prediction. However, there is no physical model yet available to explain the mechanism for the formation of these self-emitting magnetic signals. In the present research, tension-tension fatigue tests of center-cracked sheet specimens were performed. The variations in the normal component of the self-emitting magnetic signals, Hp(y), on the surfaces of the specimens were measured during the fatigue test. The differences in peak-to-peak value, Hp(y), before and after failure of a specimen, were characterized. Consequently, a physical model based on magnetic charge was proposed, which was in good agreement with the experimental results. The model is helpful for understanding the inherent mechanism of the self-emitting magnetic signals.
Crack Resistance of the Old Cement Concrete Pavement Treatment
Authors: Jiang Hong , Yuan Jian Bo , Yang Hua
Published: July 2012

Overlay new cement concrete pavement on the old cement concrete pavement following different treatment schemes, survey pavement cracking phenomenon after the opening of the new pavement , analysis the crack resistance of the various programs, accumulate experience for the cement concrete pavement repair technical solutions.
Effect of Mortar Joint Thickness on the Compressive Strength of Autoclaved Flyash - Lime Brick Masonry
Authors: Tang Feng
Published: July 2012

After autoclaved flyash-lime brick masonry was compressed, in the masonry makes pull stress,bend stress, cut stress and complex stress state. The effect of mortar joint thickness on the compressive strength of masonry is the extend of improving under the complex stress state in the masonry. In the domestic and foreign brick construction teaching materials, they are all value the influence and make some describe and comments, but it was limited to the general qualitative analysis. Still not a series study was conduct on the impact, now in order to explore the influence on it, combining with domestic and foreign relevant theory, test statistics and author’s study.
Fracture Behavior of a Brittle Thin Film on an Elastic Substrate under Residual Stress and Uniaxial Tensile Loading
Authors: Yang Ban Quan , Chen Xue Jun , Sun Wei Hai , Chen Hong Qian , Pan Jing Wen , Chen Ying
Published: July 2012

The fracture behavior of a brittle thin film on an elastic substrate under residual stress and uniaxial tensile loading is investigated. It is assumed that the residual stress in the thin film is not large enough to cause the thin film to fracture. Using a mechanical model presented in this work, the analytical solutions for the distribution laws of the tensile stress developed in the thin film, the shear stress developed along the interface and the relationship between the crack density of the thin film and the applied strain of the substrate can be obtained. The results presented in this work can provide a new analytic solution to the interfacial shear stress for characterizing the interfacial shear strength of the thin film/substrate system when the uniaxial tensile test is adopted to evaluate the mechanical properties of the thin film/substrate system.
Influence of Ageing on Yield Stress Anisotropy of Extruded 7075 Aluminum Alloy Bar at Ambient Temperature
Authors: Zhang Zhi Min , Yang Yong Biao , Xu Ke Ren
Published: July 2012

Uniaxial tensile tests of extruded 7075 aluminum alloy bar were carried out on the universal test machine at strain rate of 0.001 s-1. The tensile direction are aligned at 0°, 45°and 90°to the axis direction of the bar. Microstructure and texture was characterized using Optical Microscopy and x ray diffraction analysis. The results show that the yield stress for 0° orientation specimen, which was solution treated, is the highest, while that of 45° orientation is the lowest. The yield stresses are anisotropic for solution treated 7075 extruded bar, which could be attributed to the elongated grain structures and the texture of the bar. The yield stress anisotropic behavior diminished after peak aged.
Mechanical Properties of the Cracked Thick Aluminum Plate Repaired with M40J/Epoxy Composite Patch
Authors: Li Shi Tong , Xing Su Li , Wen Si Wei , Peng Chao Yi , Wang Shun Yong , Li Ren , Yu Fei Hu
Published: July 2012

To extend the service life of the equipment, a novel, efficient and cost-effective method is used to recover the damaged component of the equipment. The mechanical properties of unidirectional M40J/epoxy composites, prepared by molding process, were studied. Then the centre-cracked thick LC52CS aluminum plates were single and double side repaired with the composites patches by vacuum bagging technology in which three cure cycles were applied. Results show that a low cure temperature induce a small thermal residual stress. Choosing the cure cycle with the highest tensile strength of single-side repaired specimens, the tensile strength of single-side and double-side repaired specimens enhance 31.50% and 47.29% of that of the unrepaired specimens, respectively. And fatigue life of the double-side repaired specimens extends that of the cracked aluminum plate over 76 times, which is also significantly better than that of the single-side repaired specimen.
Preparation of TiO2-Pillared Montmorillonite as Photocatalyst and Photocatalytic Degradation of Methyl Orange
Authors: Zhao Bin Xia , Dang Li Ping , Zhang Xiao Li , Yang Na , Sun Yuan Yuan
Published: July 2012

In order to obtain TiO2-pillared materials, montmorillonite (MMT) from Xinghe Co. of Neimeng as matrix, was used. The tetrabutyl titanate was used as precursor for the preparation of the TiO2-pillared montmorillonite, which was applied to introduce TiO2 into its interlayer space (15 mmol Ti/g clay). The as-prepared materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and infrared spectroscopy (IR). The XRD patterns and the SEM photograph illustrated that the layers of MMT were delaminated and all samples were of the anatase phase. The TiO2-pillared montmorillonite was shown high photoactivity for the photodegradation of methyl orange dyestuff in aqueous solution under UV irradiation. The results showed that TiO2-pillared montmorillonite containing the anatase phase of TiO2 by calcination at 773 K and it was with the highest photocatalytic activity. Comparative photodegradation experiments were also conducted under different conditions. The experimental results demonstrated the feasibility of utilizing TiO2-pillared clays as a catalyst for removing methyl orange from water.
Production Practice of Hot-Rolled Thin Plate of 30CrMo Steel in WISCO
Authors: Dong Zhong Bo , Dong Han Xiong , Hong Xia
Published: July 2012

A steel plate with thickness（3~12）mm named 30CrMo（%：0.29~0.34C、0.17~0.37Si、0.40~0.70Mn、≤0.015P、≤0.010S、≤0.30Mo、0.80~1.10Cr）was developed by converter melting and hot continuous rolling. Good metallurgical quality, mechanical properties and strip shape are ensured by accurately control of smelting, rolling, coiling and decoiling process. The results show that 30CrMo steel has high purity, uniform structure and stable properties, perfect plate shape, and meets requirements of consumer.
Study on Pyrolysis Characteristic of the Waste Tires
Authors: Yu Lu Lu , Zhong Zhao Ping , Ding Kuan , Liu Zhi Chao
Published: July 2012

The effects of pyrolysis temperature on the yields of char ,oil and gas produced in the waste tire pyrolysis process ,the effects of temperature on the concentration of gas and pyrolysis oil constitutes, and the effects of HY-51 (as catalyst) on the yields and on the concentration of gas constitutes, were studied in detail. The experiments showed that the effects of pyrolysis temperature on liquid and gas products were important. The yields of the gas were primate raised, then reduced. When the pyrolysis temperature reached 550°C, the yields of oil can reach to above 45%. when adding catalyst, the yields raised to 50%.Gas product were component of H2, CH4, CO,CO2 and C2-C3, etc., there were a lot of macromolecular aromatic, and contain acid, hydrocarbon, ketone, heterocyclic (containing S, O, N, etc)in pyrolysis oil. we had been done the thermogravimetric experiments. Which were indicated that waste tire have three main mass loss stages. The range of first stage temperature was 200-350°C, 270°C was the maximum temperature of mass loss ,and the mass loss rate reached to 20.4%;The second stage mass loss temperature was 350-600 °C, the biggest temperature mass loss were in 484 °C and 547 °C, this stage rate was 64.6%; the range of the third stage was 600-675 °C, had a small mass loss peak, the rate just was 2.5% The pyrolysis oils analysis were provided the basic data for the chemical and energy basic on pyrolysis and pyrolysis characteristic of the waste tire.
A Multi-Sensor Suspension Robot for Autonomous Detection and Surveillance
Authors: Wang Chun Chieh , Lee Ting En , Hsia Kuo Hsien , Ma Li Shan , Hsieh Yi Chun
Published: July 2012

In this paper, a multi-sensor based suspension robot has been designed for the application of autonomous detection and surveillance. For fire fighters and rescuers, the disaster relief works are difficulty performed in the tunnels because of its constricted space. To reduce the losses of accident, the safety of tunnel should be ordinarily kept under surveillance. In the design of suspension robot, BASIC Stamp has been utilized as its control kernel and multiple sensors have been applied for detecting the emergencies. Once the surveillance center is announced of the emergencies, the fire fighters and rescuers could timely execute the saving mission.
A Novel Implementation of UHF RFID Reader
Authors: Wang Hong Yi , Yang Qing , Wu Jian Fei , Li Jian Cheng
Published: July 2012

The radio frequency identification technology is a kind of emerging non-contact identification technology. In the study of radio frequency identification reader, the traditional microcontroller-based architecture can’t meet the system requirements due to the limited processing ability. In this paper, the author designs a UHF RFID reader based on the ARM processor and FPGA, compared to the microcontroller-based architecture, the reader deals faster. The reader consists of three parts, namely, the protocol processing module, the digital baseband module and the RF module.
Design and Realization of Scald Device in Automatic Confecting Machine of Rice Noodles
Authors: Li Jing
Published: July 2012

Rice noodles preparation processes include scald, adding the ingredients, dishes, etc. Automatic confecting machine of rice noodles is researched to replace the current artificial preparation. Such machine not only improves production efficiency but saves labor costs. We mainly developed scald device in this subject. It’s been designed as screw-nut structure that it drives bucket slide back and forth to finish sending rice noodles. Solenoid valve is applied to control water supply and drainage. Miniature high-pressure pump is then used to scald. After this operations, the prepared rice noodles slide into bowl directly. The entire operation is controlled by the PLC. The Automatic confecting machine also heat, insulate, monitor and regulate the tank. After testing repeatedly, the machine finished the operation of scald successfully as expected.
Nonsingular Terminal Sliding Mode Control of Mobile Robot Using Support Vector Machines
Authors: Wu Xi Ru , Wang Yao Nan
Published: July 2012

In this paper, nonsingular terminal sliding mode control strategies are originally presented for mobile robot in the presence of uncertainties and disturbances. The support vector machines is used to approximate an unknown controlled system from the strategic manipulation of the model errors. Based on the Lyapunov stability theory, it is shown that the proposed controller can prove the stability of the closed-loop system and guarantee tracking performance of robotic system. Finally, simulation results validate the superior control performance of the proposed control method.
Traffic Sign Recognition Based on Vision Bionics
Authors: Zhang Zhuo , Fan Xin Nan , Zhang Xue Wu , Liang Rui Yu , Lin Shan Ming
Published: July 2012

Inspired by the research of human visual system in neuroanatomy and psychology, the paper proposes an road traffic sign identification model based on vision bionics.The model combines data-driven and task-driven visual attention mechanism to focus on traffic sign target rapidly and accuractly.Firstly,It simulates the Itti attention model to obtain “what” information and uses the priori knowledge of positional distribution of traffic sign as “where” information.Then,it adjusts saliency map according to “what” and “where” stream so as to select traffic sign focus preferentially.Secondly,it measures the similarity of shape and color features between traffic sign and attention region to get interested region.Finally, it segments traffic sign based on color characteristics and classify shape of traffic sign based on the Support Vector Machine method. The experimental results demonstrate that the feasibility and effectiveness of the proposed model; Furthermore, the average accuracy rate of shape classification on DtBs matrix reaches 98%.
Visual Simulation for Satellite on Track and Shaded Part Compute for Solar Panel
Authors: Li Nian Xuan , Wang Yue Feng
Published: July 2012

Abstract: For the purpose of scene simulation of satellite moving on track and shaded part compute for solar panel, this paper analyzed the visualization system's software architecture, introduced Program design method with GDI+ and OpenGL on MFC frame. Based on the analysis, software architecture was optimized and some reusable classes were also designed. Therefore a more reusable, extendable and modularized visualization system can be realized. It covered a wide range of function such as the visual simulation, shaded part compute for solar panel and results display. The results showed that this visualization system was satisfactory and feasible in the simulation.
Feature Extraction of Ground Vehicles from High Resolution SAR Imagery Based on Electromagnetic Scattering Characteristic
Authors: Ji Ke Feng , Xing Xiang Wei , Zhang Jing Ke , Zhou Huan Xin
Published: July 2012

Feature extraction is an important phase in SAR imagery interpretation and target recognition, electromagnetic scattering characteristic is the inherent characteristic of target on SAR imagery. High resolution SAR imagery interpretation and target recognition, particularly the ground vehicles recognition, needs to be carried through based on target scattering characteristic and target’s electromagnetic feature extraction. This paper analyzes the electromagnetic scattering mechanism of typical ground vehicles firstly, and the feasibility of modeling the electromagnetic scattering characteristic of ground vehicles with attributed scattering center model has been discussed in brief. And then, by making some improvement on the existing method of attributed scattering center feature extraction from SAR imagery, a modified method for feature extraction of ground vehicles from measured high resolution SAR imagery based on electromagnetic scattering characteristic has been proposed. Finally, performance of the proposed algorithm has been validated on measured 0.3m resolution MSTAR and 0.1m resolution MiniSAR SAR imagery data.
Development Practice of LCR Automatic Test System Based on Agilent E4980A
Authors: Yang Meng Tao , Zhu Chun Rong , Jin Hong Wei , Cai Wei , Wang Xiao Mei
Published: July 2012

Aiming at the complicated situation of artificial testing function materials, a set of automatic test system based on Agilent E4980A is developed. In the control software edited by Visual Basic 6.0, the test conditions (temperature, frequency, voltage, etc.) are pre-set, and the system automatically controls the temperature of the temperature control box through PID algorithm, achieving the real-time test voltage and frequency of Agilent E4980A. The card shows the readings on the test results of a plurality of functional materials at various stages of temperature conditions , automatically completing the storage and analysis of electrical parameters. The system is able to achieve the automatic control of the temperature control box and Agilent E4980A, presenting the comparative benefits including the function of this system being more comprehensive, more convenience in operation, and higher degree of automation advantages . It can be a good method and reference resource available for the development of such test system.
Simulation Analysis of the Vibration Characteristics of the Parallel Hybrid Shaft System
Authors: Zuo Jin Yu , Liu Shao Jun , Huang Zhong Hua , Hu Qiong
Published: July 2012

Abstract. The multi-body dynamics simulation model of the hybrid system with a flexible shaft was established through rationally simplifying the system structure of a parallel hybrid system, assembling the flexible shaft, pulley, piston assembly , rod assembly and the rotor shaft according to the actual constraints, and adding the appropriate connections. The engine cylinder pressure reconstruction model and the motor vector control model were established in MATLAB as system shafting incentives. The simulation analysis of the dynamic characteristics of the system shafting was carried out in the boost mode of the hybrid system. The results show that: the shaft torsional vibration and bending vibration have happened when the hybrid system is running, and the engine cylinder pressure change was the main factor which caused the shaft vibration. Torsional vibration occurs mainly near the even multiple of the frequency of the shaft rotational frequency, and the torsional amplitude decreases gradually with the increase of resonance frequency; radial vibration occurs mainly in the range of 0 to 3 times the rotational frequency.
A Solution about Application System How to Transfer Information Across Different Domains
Authors: Yang Guang Hong , Zhang Qing , Tang Ding Yong , Huang Cong Min
Published: July 2012

We design a data exchange platform with the joint topology , based on data exchange and file encryption technology of messaging middleware and integration middleware, after analyzing the requirements on how to exchange information of different application systems in different security domains. The platform achieves the purpose of exchanging information securely between different application systems and different security domains , in accordance with the requirements of relevant standards.
Application of a Optimized Wavelet Neural Networks in Rolling Bearing Fault Diagnosis
Authors: Lin Yuan Yan , Wang Bin Wu
Published: July 2012

According to the fault type and fault signal of rolling bearing is difficult to predict, the paper proposed a new method to diagnose fault of rolling bearings with the wavelet neural network optimizated by simulated annealing particle swarm optimization. And it was applied to the fault diagnosis of rolling bearing. The experiment shows that this method can reduce the iteration time and improve the accuracy of convergence.
Application of Radius Error Compensation Principle in the Profile Measuring Instrument
Authors: Wang Jun Feng , Ma Fu Gui
Published: July 2012

The paper analyses the compensation error which is caused by the probe radius of shape measurement instrument with the theory of envelope, and the model of the probe center is established. After having coordinates of envelope point corresponding to data point, actual curve equation has been obtained by using non-uniform B-spline curve. Finally, the effect is simulated and analysed by Matlab, and the result shows that the method of data processing has high precision.
Convergence of Numerical Solutions to Stochastic Age-Structured System of Two Species with Diffusion
Authors: Liu Bin , Zhang Qi Min
Published: July 2012

In general, most of stochastic age-structured system of two species with diffusion do not have explicit solutions, thus numerical approximation schemes are invaluable tools for exploring their properties. The main purpose of this paper is to develop a numerical scheme and show the convergence of the numerical approximation solution to the true solution for stochastic age-structured system of two species.
E-Bayesian Estimation of Failure Probability under Zero-Failure Data with Double Hyper Parameters
Authors: Wu Xian Bin
Published: July 2012

This paper presents the Bayesian analysis of the zero-failure data with double hyper parameters a, b. We take prior distribution of failure probability pi be its conjugated distribution—Beta (pi-1, 1, 1, b) and hyper parameter b as the uniform distribution in (1, c). With quadratic loss function, If pi  (pi-1, 1), the E-Bayesian estimation of pi is . When 0 < c < si, and satisfy (I) ;(II) . The results satisfy . The properties of E-Bayesian estimation are given. A Simulation example is discussed, which shows that the method is both efficiency and easy to operate.
Fault Diagnosis for Suspension Signal of Maglev Vehicle Based on Mathematical Model
Authors: Cui Ying Pu , She Long Hua , Li Xiao Long , Hao A Ming
Published: July 2012

Firstly, build the suspension-control-system model under the condition of elastic guideway, and design the controller. Secondly, design the Kalman forecaster based on model, and diagnose the fault by comparing forecasted value with real value. Finally, verify the effectiveness of this fault diagnosis method for suspension signal by simulation.
Imaging of Transmission Equipment Based on Block Compressed Sensing
Authors: Zhao Jing Jing , Sun Ji Xiang , Zhou Shi Lin , Hu Lei
Published: July 2012

Imaging the overhead transmission equipment with high-resolution is very important to intelligent inspection, which is the prerequisites for fault diagnose. The intelligent inspection system often takes traditional imaging process of data acquisition followed by compression, which leads to the waste of image data and memory resources. We adopt an imaging method based on block compressed sensing to image the transmission equipment, the simulation results show that even if we only compressively sampled with 12.5% of the fully acquired image data, the image still can be recovered with high quality.
Simulation Analysis of Five-Roll Covering Rollers System for Binding Machine of Section Steel Bars
Authors: Xu Yuan Yuan , Wang Feng Hui , Teng Yue
Published: July 2012

Binding machine of section steel bars is full automatic packaging equipment that structure is very complex and it sets hydraulic-numerical control integration in order to perform continuous production of modern production line and meet the need of many binding types of section steel bars. Five-roll covering rollers system referring to two parts was mainly studied in this paper. SolidWorks software was used to analyze the movement and force; ANSYS/LS-DYNA was used to do optimization analysis for the positions of the covering rollers mechanism when the wire rope was in the different angles of section steel bars binding and the different forces. Compared with single-roll covering rollers system, five-roll covering rollers system was more suitable for the requirement of various kinds of section steel bars binding packed. The results show that five-roll covering rollers system can increase the extending degree of the steel wire and make the steel wire much close to the steel ladle.
Simulation Research of Natural Gas Injection Timing on Combustion Process in a Diesel Engine Fueled with Pilot-Ignited Directly-Injected Natural Gas
Authors: Li Nan Nan , Li Shu Hua , Li Xiao Xiao
Published: July 2012

The numerical model of diesel engine fueled with pilot-ignited directly-injected natural gas is built, and the influence of natural gas injection timing on the combustion process is studied using CFD software. And obtained the following conclusions, as the delay of natural gas injection timing, the maximum of the mean pressure and mean temperature decrease gradually and the timings for the maximum value increase. With every delay of 5 °CA of the injection, the mean pressure reduces by about 16%.As the delay of injection timing, the delay of the timing of the high temperature and the range decrease for the high temperature region, and this is beneficial for the emission of NO, but not conducive to the emission of HC、CO and PM
Parametric Analysis in Tug-of-War Based on Ideal Biomechanical Model
Authors: Zhang Bing
Published: July 2012

This paper, in perspective of biomechanics, analyzes tug-of-war, on condition of maximum friction and stable rope, and achieves the sequence which can exert maximum energy. The key to exert maximum energy is to achieve maximum friction. Firstly, build an ideal and simple model, with mechanical analysis, and get that point. Secondly, analyze the maximum pressure and conduct force analysis of rope, with a conclusion that if the sequence is arrayed from short to tall and only when the heights are the same, the athletes with greater weight should stand behind.
Workspace Analysis and Calculation for the Manipulator of a Explosive-Handling Robot in Mine
Authors: Tian Hai Bo , Li Ai Min , Kou Fa Rong
Published: July 2012

The volume of workspace is one of the most important parameters to evaluate the flexibility of a robot. Monte Carlo Method and adaptive-divided mesh method were applied to analyze the workspace of the manipulator of a explosive-handling robot in mine. Firstly, the kinematical model of the manipulator was taken forward based on its main structure. Then, its kinematics analysis was given. Based on them, the manipulator’s workspace was analyzed by Monte Carlo Method and the cloud picture was completed. At last, the ‘Adaptive-divided Mesh Method’ was brought forward and the volume of the workspace was calculated with it. The result shows that the workspace’s volume is large enough and the working points in the workspace of the explosive-handling manipulator were distributed compactly and uniformly, which can satisfy the requirements with high efficiency.
Test Design on Minicar Transmission System Efficiency Using Dimensional Analysis
Authors: Wang Wang Ping , Mo Yi Min
Published: July 2012

Based on formulating the minicar transmission efficiency test standard,the test was designed by using dimensional analysis theory. Selected the power loss of transmission system as evaluation index, the effects of parameters such as oil temperature,oil depth of stir oil gear, line speed of stir oil gear, transmission system ratio, input speed and input torque were experimented. It has the advantages of less test times and more design freedom. The test design provides theory basis for the empirical formula which indicates the relationship between power loss and test parameters.
Research on Integrated Onboard Charger for Electric Vehicle
Authors: Jia Guo Zhong , Li You Cai , Qiao Gui Ling
Published: July 2012

This paper discusses the development and application of an integrated multi -functional onboard charger for electric vehicle, and introduces its main circuit structure, operating principle and the main characteristics. The product design is verified and optimized with computer simulation technology. Finally prototype functional and performance test are carried out. The results show that the charger operates efficiently and stably, and suitable for onboard operation.
MPA Method Simplify Evaluated Frame Structural Damage
Authors: Ren Jiang , Wang Ze Yun , Jiang Cai Yuan , Wang Yu
Published: July 2012

After briefly introducing the characteristics and steps of the MPA method, the article adopts this method to evaluating the overall damage index. This method quantitatively explained that the infilled walls are a lateral force component, which effectively reduces the overall damage.
Evaluating Operational Effectiveness of Air and Missile Defense Warhead Based on LMBP Neural Network
Authors: Han Xiao Ming , Chen Jun Jie , Jiang Ke
Published: July 2012

The air and missile defense warhead is the final unit of destroying target. The evaluation index of warhead is referred to what its combat mission is to achieve the desired target degree in the prescribed conditions and time. It’s also the main index with performance of the air and missile defense. According to the characters of air and missile defense warhead, the evaluation index system of warhead is given. The effect function is introduced to quantitate the evaluation index, and the function equation is given to fit the air and missile defense warhead. On this foundation, the evaluation model of operational effectiveness based on LMBP neural network is presented, then it is validated that the model has a higher value by an example.
Stability of Neutral Stochastic Delay Differential Equation
Authors: Hu Rong , Shao De Jun
Published: July 2012

The paper discusses the pth moment stability of neutral stochastic differential equation with multiple variable delays. The stability is more general and representative than the exponential stability. This investigation uses a specific Lyapunov function based on usual methods. And it discusses the neutral stochastic differential equations with multiple variable delays which is much more general form. Finally a two dimensional half-linear example is discussed to illustrate the theory.
A New Power Flow Control and Management Method Based on Multi-Line Transmission/Distribution Networks
Authors: Xu Yong Sheng
Published: July 2012

A new concept of using a PV solar power plant as interline PV system is introduced in this paper. As the name suggests, the interline PV system interconnects two (possibly more) transmission/distribution lines by reconfiguring existing PV solar plant inverters. This newly developed system thus can act as a FACTS device providing a flexible control over both active and reactive powers on multiple lines simultaneously.
The Research of Active Cancellation Stealth System Design
Authors: Xu Sheng , Xu Yuan Ming , Huang Jun
Published: July 2012

An active cancellation stealth system was designed based on the phased array techni- que, digital radio frequency memory (DRFM) and field programmable gate array (FPGA). Using the off-line calculation method, which establish goals of omnidirectional radar cross- section (RCS) database, clutter and noise database in advance. Signal processing and control module analyzes the measured radar signal parameter , then find the corresponding target echo data in the RCS database, and real-time adjustment of coherent echo amplitude and phase. Make target scattering field and artificial introduced into radiation field coherent cancellation in radar direction, so that the radar receiver is always in nulls synthesis pattern. Through the combination of software and hardware of the method in engineering realization of active cancellation stealth.