bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Aerocraft Attitude Testing Technology Based on the BP ANN
Authors: Liang Zhi Jian , Ma Tie Hua
Published: December 2012

For measure parameters of aerocraft Attitude, this paper puts forward the BP ANN model based on the information integration theory, the problem of lower angular speed accuracy and bigger navigation error are solved. Through researching the aerocraft attitude affection based on the output of the gyro/geomagnetic sensor，the network model are set up. The gyro/terrestrial magnetic sensor output signal is used as input, and real-time three axis angular speed as output. After trained for the test samples, we got the higher precision of angular speed, then calculated attitude angle applied the approximation formula method, reduced systematic errors. After lots of experiments on the no magnetic turntable, the result shows that the method has the characteristics of fast convergence and better angular speed accuracy.
Measurement of Spacecraft Simulator Motion Parameters Based on Multi-Vision System
Authors: Guo Yu Bo , Ma Hui Ping , Xia Qi , Chen Gang , Yuan Feng
Published: December 2012

A real-time measurement method based on multi-vision system is presented for measuring the motion parameters of three-DOF spacecraft simulator. Four cameras are arranged around the motion space of the simulator. When the simulator makes large range translation and rotation motion, 3D coordinate measurement can be realized for any marker provided that such marker is identified by 2 or more cameras. And the motion parameters of simulator can be measured when more than 3 markers are identified in each measurement. The experiment results verify this method and show it can achieve high measurement accuracy.
The Radius of an Ultrashort Pulsed-Laser to Fresnel Diffraction of a Serrated Aperture
Authors: Wang Huai Sheng
Published: December 2012

First we give the optical field function at distance z for a monochromatic light according to the Fresnel diffraction theory. The total optical field intensity is an integral of that of the monochromatic light. The total optical field intensity is not only related to the full width at half maximum, the distance, the structure of the serrated aperture, but also the radius of the ultrashort laser pulse. Numerical calculation shows that when the ratio of the averaged radius of the serrated aperture to the radius of the ultrashort laser pulse equals to 1 and the full width at half maximum is within a few tens of femtoseconds, the total optical field intensity reaches a constant along the axis direction and it is more stable than that without considering the radius of the ultrashort laser pulse in case that the Fresnel number of the laser pulse is about a hundred.
A Modal Analysis of Eccentric Shaft of Caster Vibration Device
Authors: Shi Jia Lian , Yang Xu , Ma Da Dong
Published: December 2012

The model of eccentric shaft of caster vibration device is built by finite element software ANSYS, and bearings are regarded as rigid constraints and elastic constraints.Firstly, regarding the bearings as rigid constraints, the nodes on the parts of eccentric shaft, which match with bearing,are exerted full constraints. Secondly, regarding bearings as elastic constraints, spring, which is built by elastic element combination 14, are used to replace the bearings. In addition, the full constraints are exerted on the one side of spring,and axial constraint are exerted on the other side. Afterwards make the modal analysis of eccentric shaft.Solve and extract the first six natural frequency and modal shape.Watch and analyse the breaking formal of eccentric shaft as it is in different mode. The basis are settled for instantaneous and harmonic analysis.
Analysis on Dynamic Characteristics of Paper Feeding Device
Authors: Huang Yuan , Cai Ji Fei , Xie Run
Published: December 2012

Variable head sizes of paper roll will influence the stability of paper feeding device and hence the printing quality. Therefore, it is necessary to improve the printing quality by improving the stability of paper feeding device based on dynamic analysis on the phenomenon of variable head sizes of paper roll. It is found through dynamic analysis that the effect of variable head sizes on the support force of bearings is nearly five times that of the case when such effect does not exist. Vibration performance analysis of paper feeding device using finite element analysis obtains the natural frequencies of the first 6 orders for paper carriage and their dominant vibrational modes. This provides theoretical basis for the improvement of paper feeding device.
Dynamic Performance Analysis for Milling Head Box of Spiral Drill Collar Machine
Authors: Wang Ke , Song Yu Xiao , Sun Xing Wei
Published: December 2012

Milling head box is an important supporting part of spiral drill collar machine. Its dynamic performance has a big effect to the machine tool working accuracy. The three-dimensional (3D) model of milling head box was built in this paper. With finite element analysis software, the dynamic performance of the box was analyzed. The first six natural frequencies, relevant vibrations and mode shapes of the box were obtained. The results indicate that the milling head box structure is reasonable. No resonance will be induced during the machining process. It also provides thoughts and reference for further dynamic performance researches with practical significance.
Analysis and Modeling of Error Sources for Spiral Bevel Gear Honing Machine Based on Multi-Body System Theory
Authors: Zhang Guo Zheng , Han Jiang , Liu You Yu
Published: December 2012

Analyzing some main errors of NC spiral bevel gear honing machine-tool, the elements of geometric error, thermal error and force error etc., which are constructed 39 error sources of the machine by stack method. Based on multi-body system theory, using homogeneous transfer matrix(HTM) method to present six feature matrixes that includes ideal-static matrix, ideal-kinematic matrix, ideal-static translation error matrix, ideal-static rotary error matrix, non-ideal rotary motion error matrix and non-ideal translation motion error matrix, which are built between of adjacent body. Finally, the synthetic volumetric error model of six-axis honing machine-tool is established.
Optimization Method of the Rubber Elastic Element Structure Based on the Vibrational Power Flow
Authors: Liu Wen Wu , Lou Jing Jun , Wu Hai Ping
Published: December 2012

The isolation design of the ship must be considered based on flexibility, usually using vibration power flow analysis theory. The proposed vibration power flow based on finite element method aims the optimization to minimize the vibration power flow. The rubber elastic element structural optimization method has been study as follows.
Research on Optimization of Flow Field in 60t Tow-Strand Tundish by Hydraulic Model
Authors: Zhang Jian Jun , Gao Wen Fang , Peng Zhu Gang
Published: December 2012

The original scheme flow behavior of WISCO 60t two-strand tundish was investigated by means of hydraulic model. Optimized scheme was selected by flow field Character analyzing and residence time distribution (RTD) curves analyzing of each scheme. The results show that the dead volume Vd of optimized scheme decreases to 5.33%, reduced by 77.4% compared with the original scheme. The average residence time Ta of optimized scheme increases to 364.5s, increased by 70.5s compared with the original scheme. The optimized scheme favors more reasonable flow field and inclusions removing in the tundish. It is more adaptive than the original scheme for the tow-strand tundish.
Impeller Finite Element Analysis of Extractable Explosion-Proof Contra-Rotating Axial Fan for Mine Local Ventilation FBDC
Authors: He Qiu Dong , Yu Wen Qi , Xiao Shu Fen
Published: December 2012

To improve the impeller safety and reliability of extractable explosion-proof contra-rotating axial fan for mine local ventilation, Extractable Fan FBDC№9.0/2×30 was taken as the research object, and an approximate three-dimensional finite element computation model was built by using ANSYS software. The stress and displacement were calculated, too. By testing, the fan works stably. The air quantity is 655-978 m3/min, total pressure, 3443-412Pa, static pressure, 3314-118Pa. And the highest static pressure efficiency is up to 70.35%, A-weight Specific Sound Level is 17.5dB. Furthermore, the intension and stiffness of the impeller meet requirements. Sample test and field using show that the computation and the model of this impeller are right. Through reasonable design, the impeller of contra-rotating axial fan with equally-thick circular arc blade profile and ordinary hot-rolling low-carbon steel blades has the intension and the stiffness which meets demands, and the air performance reaches higher level.
The Combined-Matching Design of the Tower Body of Tower Crane
Authors: Li Bin , Ke Yong Xian , Song Zhong Liang , Liu Hong Da
Published: December 2012

In order to improve the interchangeability of a standard section and determine the tower body of the optimal combination-matching, taking 45 combination schemes of three models of tower cranes for example, the ANSYS for hoist boom at working state of the diagonal of tower body have been used to make the calculation and analysis, the distribution map of the total displacement and the axial force at this condition have been obtained. According to the results, the stiffness, strength and stability of tower body have been analyzed. The tower body of the optimal combination-matching is chosen by the fuzzy evaluation method. It is proved that the optimal combination-matching through the fuzzy evaluation method is accord with production requirement.
Modeling and Design of 3D Visualization on Giant Magnetostrictive Actuator
Authors: Zeng Fan , Lou Jing Jun , Zhu Shi Jian
Published: December 2012

This paper introduces the characteristics of SolidWorks software and process of modeling and design of giant magnetostrictive actuator. Parts designing, formation of assembly body, sports simulation, and two-dimensional engineering graphics are completed on the way of giant magnetostrictive actuator structure with SolidWorks software. In the process of the giant magnetostrictive actuators modeling, the interference and clearance of assembly bady is found and revised in time to ensure the design more reasonable.
Development of a Precision Micro-Assembly Machine for ICF Targets
Authors: Wu Wen Rong , Yu Da Hai , Zhang Lin , Qiu Zu Rong , Huang Xin Han
Published: December 2012

The Precision Micro-Assembly Machine was developed to manufacture the ICF targets, which have submillimeter-sized components with micrometer sized features. The machine provides simultaneous manipulation of three objects in a 3-cm3 operating arena and can stitch together multiple millimeter-scales operating arenas over distances spanning tens of centimeters with micrometer-level accuracy. In this report, we will discuss the technologies that are merged to help assist the research community with micro-component fabrication. Furthermore, we also present the design of the online monitoring system, which contains two kinds of non-contact measurement system, microscopic image and laser confocal. The online monitoring system can characterize the positions of the target components during the assembly process. The effect and mathematic model of on-line measuring was analyzed. The results of target assembly experiments show position tolerance of the assembly is not more than 10μm.
The Kinematic Modeling of a 2-DOF Rotational Parallel Fixture
Authors: Cai Shan Le , Huang Wen Tao , Peng Li Bin
Published: December 2012

Put forward a kind of 2 dof parallel fixture. The moving platform of the fixture has two rotational degrees of freedom relative to the fixed platform. Do the institutional analysis and its degree of freedom calculation. Study the kinematics modeling method, and carry out an analysis on forward and inverse solutions of its positions. The new parallel fixture will have wide appli¬ca¬tion in the field of machining.
Study on Tilt Properties of Orifice-Compensated Aerostatic Thrust Bearings
Authors: Wei Long , Deng Ming Min
Published: December 2012

Under different throttle type, the bearing lateral force is calculated with the heeling angle changed by using the finite volume method. Also, cavity diameter and depth are selected, which can get influence on bearing lateral force in the same heeling angle. By attributing the error between experiment results and compensational ones to measurement error and instrument error itself, the results are verificated.
Thermal Layout Optimization of Stacked Chip Based on Ant Colony Algorithm
Authors: Jiang Jiang Guo , Su Qian , Shi Ling Feng , Xu Wen Dan
Published: December 2012

In this paper, an ant colony algorithm based on mutual information similarity is proposed to solve the stacked chips on the thermal layout optimization. In order to express the mutual information entropy between the optimal path and walking path, a new similarity impact factor is added in the algorithm operators of ant colony algorithm which increases the global search capability of original algorithm and moves the search speed in the solution space. Comparing with the traditional algorithm through experiment, the results show that the new algorithm improves some extent in solving performance and jumping out of the local minimum solution. The stacked chip temperature is significantly reduced when The new algorithm is applied to thermal layout optimization.
A Practical Algorithm for Ball-End Mill Using a Five-Axis CNC Grinding Machine
Authors: Sun Xiao Jun , Tang Fei , Wang Xiao Hao
Published: December 2012

A novel ball-end mill manufacturing algorithm of 5-Axis CNC Machining grinder and the simulation test of the algorithm based on a CAD system are presented in this paper. In order to obtain an accurate algorithm of a ball end mill machining, a mathematical model is needed so that the shape of the mill can be parameterized. Therefore, the mathematical model can be adjusted based on that model. Each of the processing parts has its own position in the local coordinates system. Then, with the coordinates determined by the mathematical model, the partial coordinate and the relative movement between the grinding wheel and the barstock in the local coordinates system can be calculated. So that the 5-Axis manufacturing coordinate can be confirmed by the partial coordinate and the structural parameter. If we input these data and make the 3D-CAD simulation before the machinery manufacture, the algorithm can be tested effectively.
The Application of PLC in the Stepper Motor Closed-Loop Control System Design
Authors: Wang Xiao Yu
Published: December 2012

The application of PLC 、Stepper motor driver and Encoder are introduced in stepper motor closed-loop control system. The Principle diagram is analyzed, the Control System flow chart and Software program are designed. Through in-situ operation, the system has been proved well reliability、 stability and simplicity , achieved high accuracy and low cost requirements。
Study on Two-Step Method for Robot Dynamics Parameters Calibration
Authors: Jia Qing Xuan , Li Tong , Chen Gang
Published: December 2012

In order to obtain accurate dynamics parameters, a two-step method for robot dynamics parameters calibration is presented. In the first step a multidimensional matrix is constituted through transforming the configurations of robot manipulators and the product of quality and centroid coordinate about links is solved by using the least square method. In the second step decoupling dynamic equation of robot is deduced based on Newton-Euler algorithm, and through planning specific joint movement, the inertia tensor and centroid coordinate of robot links are calibrated making use of the pseudo inverse method. By the above two steps, the entire calibration of robot dynamic parameters is achieved. The correctness and feasibility of the presented calibration method is manifested by simulations and experiments.
The Path Optimization of Spray Painting Robot for Two Path Pattern
Authors: Teng Kai , Zeng Yong
Published: December 2012

Automatic trajectory generation for spray painting is highly desirable for today’s automotive manufacturing. Generating paint gun trajectories for complex curved surfaces to satisfy paint thickness requirements is still highly challenging due to the complex geometry of surfaces. In this paper, based on existing of method which complex surfaces are divided into patches to satisfy the constraints, two path optimization algorithms for path pattern have been developed. Two algorithms are developed to optimize the spiral path and zigzag path on a patch by modifying the planning direction of paint gun path. The results of simulations have shown that the two path planning algorithms achieve satisfactory performance.
Research on Pneumatic Control System of Box Unfolding and Closing Mechanism of Horizontal Type Boxing Line
Authors: Chai Cheng Wen , Cai Ji Fei
Published: December 2012

Automatic box unfolding and closing mechanisms are the important components of the horizontal type boxing line. The process principle of box unfolding and closing mechanisms was researched based on the production requirement of the boxing line. The structure scheme was brought out, which was mainly composed of box opening mechanism, box unfolding mechanism, posture keeping device, box closing mechanism and sealing device. The composition and working principle of pneumatic control system of the box unfolding and closing mechanisms was analyzed and the pneumatic sequential operation control circuitry with multi-cylinders was simulation designed and debugged by using the software FluidSim. The control system was also constructed of PLC module and its assistant components, whose program was compiled and simulated in the software GX Developer and Simulator. The theoretical basis for researching and developing the packing line was established by proposing the solution and design method of pneumatic control system driving the box unfolding and closing mechanisms.
Study on Genetic Fuzzy Wavelet Neural Network Controller of Robotic Manipulator
Authors: Wang Yong Lin , Wang Dong Yun
Published: December 2012

This paper deals with the tracking controller design of robotic manipulator using genetic algorithm (GA). A genetic fuzzy wavelet neural network (GFWNN) controller is designed and implemented based on MATLAB in this paper, whose parameters are optimized by GA. The structure and algorithm of fuzzy wavelet neural network (FWNN) are described at first. Then the key content of GA used in this paper and the steps for using GA to optimize FWNN are demonstrated. Finally, a numerical simulation of tracking control for 2-link robotic manipulator is given to verify the effectiveness of the proposed method.
Assembly Line Balancing the Comparison of COMSOAL and MSNSH Technique in Motorcycle Manufacturing Company
Authors: Lerttira Areeda , Yarlagadda Prasad K.D.V.
Published: December 2012

Today’s highly competitive market influences the manufacturing industry to improve their production systems to become the optimal system in the shortest cycle time as possible. One of most common problems in manufacturing systems is the assembly line balancing problem. The assembly line balancing problem involves task assignments to workstations with optimum line efficiency The most common purposes of Computer Method for Sequencing Operations for Assembly Line (COMSOAL) are to minimise idle time, optimise production line efficiency, and minimise the number of workstations. Therefore, this paper leads to implement COMSOAL to balance an assembly line in the motorcycle industry. The new solution by COMSOAL will be used to compare with the previous solution that was developed by Multi‐Started Neighborhood Search Heuristic (MSNSH), which will result in five aspects including cycle time, total idle time, line efficiency, average daily productivity rate, and the workload balance. The journal name “Optimising and simulating the assembly line balancing problem in a motorcycle manufacturing company: a case study” will be used as the case study for this project.
Research on Vacuum Consumable Arc Remelting Furnace Control System with Drop Short Pulses Testing
Authors: Lv Guo Yun , Hu Shui Xian
Published: December 2012

Stable and Reliable automatic control system of Vacuum Consumable Arc Remelting (VAR) furnace is the key to smelt successfully special alloy metal and high temperature alloy metal, which is related to special properties of remelting ingot directly. This paper makes a deep study for drop short pulse testing and controlling system, and digital signal processing is used to obtain drop short pulse value with different frequency ranges. Firstly, basic theory analysis of drop short pulse measuring and controlling is researched. Secondly, high-speed digital signal processing technology is adopted to sample furnace voltage signal real-timely, band pass filter group is designed directly to process and calculate the amount of drop short pulses in different frequency ranges, Finally, the relationship between drop short pulse frequency and special alloy materials is analyzed, fuzzy PID control method is used to adjust electrode gap and control arc length. Field experiment results show the effectiveness of the whole drop short pulse testing and controlling system.
The Analysis of Soft Starting System of Brushless Excitation Synchronous Motor
Authors: Yang Xian Zhao , Cheng Geng Guo
Published: December 2012

This paper studies the synchronization of brushless excitation frequency soft start system design. On the basis of principle of the synchronized machine brushless excitation frequency soft starter system, the practical applications of brushless motor control system are elaborated. Experimental results in engineering show effectiveness of the design.
A Chaotic Cellular Neural Network System Research and Implementation Based on FPGA
Authors: Chen Zai Ping , Cai Peng Fei , Dong En Zeng
Published: December 2012

Proposed a chaotic cellular neural network system, in-depth study of the system dynamic characteristics through theoretical analysis and simulation, to obtain the system Lyapunov exponent spectrum, also designed the hardware circuit, and get the physical implementation of chaos system through the FPGA, observing all kinds of chaotic attractor. The experimental results are fully consistent with the Matlab simulation results, thus this physical implementation is correct and feasible.
The Research and Design of Smart Home Based on Virtual Reality Technology
Authors: Yang Kai
Published: December 2012

With the development of virtual reality technology and wireless sensor network technology, application oriented Smart Home system has become the focus of the research. In this context, this paper put forward an Smart Home application solution based on virtual reality and expounds the design process from the system architecture, hardware design, software design and the prototype system. Test shows that the system has good effectiveness, practicability and advancement.
Research on Influencing Spreading Model of Road Congestion Based on Traffic Flow and Cellular Automata Approaches
Authors: Men Yu Zhuo , Yu Hai Bo , Li Xian Sheng , Wang Hua , Xu Liang
Published: December 2012

The quantifying model of influences from urban road traffic accidents is built in this paper, in order to research influencing coverage and effects from road traffic accidents; and the reasonable evaluation indexes are adopted based on the model to quantify influencing coverage and effects from road traffic accidents and determine related factors with influencing coverage and effects from road traffic accidents, also the model is contrasted and verified by actual cases; it is shown from the results that the queue length, traffic recovery time and travel time error are in compliance with the requirements, indicating that the simulation results of this model is feasible and effective, with a certain reliability, and provides a theoretical basis for the evaluation of the effectiveness of traffic emergency measures and implementation of traffic control.
Improvement of Set-Covering Weighted Control Model of S3PR
Authors: Chao Daniel Yuh , Lien Yao Nan , Chen Jiun Ting , Shih Yu Ying
Published: December 2012

The set-covering approach by Piroddi et al. may reach the optimal number of states among all approaches for a well-known benchmark using a siphon-based approach without reachability analysis. However, the resulting model is a generalized Petri net incurring extra cost in system verification, validation and implementation. The only improvement is to replace two monitors with weighted arcs by two new monitors without weighted arcs. We develop a theory for explaining the cause of state losses and providing the foundation for the above improvement model.
Intelligent Algorithm in Automatic Fire Alarm Application
Authors: Wang Yan Qiu , Wang Yan Wen , Pei Chun Mei , Yang Xiu Qing , Ye Hai Rong
Published: December 2012

Characteristics of fire detection signal are proposed that, in fire case non-fire signals caused by other factors can not be separated from fire signals and in non-fire case non-fire signals may produce changes similar to fire signals. An intelligent algorithm is pointed out to reduce false alarm rate and miss alarm rate, it can improve fire alarm accuracy. The intelligent algorithm includes digital filter, sensitivity autoregulation, drift aotocompensation and rising rate analysis, and it is useful in practical engineering.
Multi-Band Antenna of Mobile Handset with Metal Frame for Wireless Communication
Authors: Kong Ling Bing , Zhong Shun Shi
Published: December 2012

A new multi-band antenna of the mobile handset with a special structure for the wireless communication applications is introduced, where the intrinsic slots between metal frame and the metal ground of the handset is taken as the main structure of the handset antenna, and the slots are fed by a tapered strip and two thin open-end strips with different lengths. Good performances of the proposed antenna are obtained by using this simple structure. The measured results of the RL and efficiency are presented. The good agreement is also achieved between the measurement and the simulation. No matter in the performances of the antenna, or in the occupied area, the proposed antenna would have a valuable application in handset for the metal frame structure.
To Analyze The Influence Factors on Energy Saving of Hybrid Bus
Authors: Jiao Ya Lee , Li Yao Ping , Yan Wen Sheng
Published: December 2012

In order to discuss the different factors, influence on hybrid bus energy saving, we analyzed the collected data information which got when the hybrid bus driving. Discussing the situation that energy consumption and energy recovery when the hybrid operation. At last get the best operational condition when the hybrid bus can play a energy-saving role by analyze the factors such as recovery energy condition, different elevations and different starting ways
Development of Uphole Monitor for MWD in Underground Directional Drilling in Coalmine
Authors: Wang Long Peng , Gao Jun , Zhang Jian Ming , Shi Zhi Jun
Published: December 2012

Measurement while drilling (MWD) is the key for underground directional drilling in coalmine. In this paper, an uphole monitor for MWD is developed to process and display downhole measure data. Firstly, an explosion-proof computer is developed, which can be used in explosive gas atmosphere. The flameproof enclosure and intrinsic safe type of protection have been employed to meet the needs of explosion-proof and communication with measure unit. A Windows-based software is subsequently developed to show the measure result and generate the in-seam drilling trajectory. The uphole monitor has been integrated into directional drilling system and demonstrated by the application in China’s coalmines.
Research on Key Technologies in the Field of Wood Saving and Substitution in Packaging of Electromechanical Products
Authors: Su Shi Wei , Chen An , Yang Hong Qiang
Published: December 2012

Wood saving and substitution is an effective means to relieve the imbalance between wood supply and demand in China. The packaging of electromechanical products consumes a considerable amount of wood, so the promotion of wood saving and substitution in the packaging of electromechanical products has significant meaning in saving quality timber and protecting forest resources and ecological environments. This paper presents the research on key technologies in the field of wood saving and substitution of packing of electromechanical products to resolve problems with substitute materials, manufacturing equipment, technological process and standardization in the field of wood saving and substitution in packaging of electromechanical products in China.
An Opto-Electronic Image Sensor Using for Low-Light-Level in Neutron Digital Radiography(n-DR)
Authors: Zhang Ai Min , Wei Biao , Feng Peng , Mi De Ling , Ren Yong
Published: December 2012

ICCD is one of the opto-electronic image sensors, commonly used in neutron low-light-level imaging system and the coupling of CCD and Image-Intensifier is the key technology in ICCD. This paper discussed the structure of ICCD, and simulated the coupling of relay lens, cone fibers and grin lens based on ZEMAX. We analyzed and checked their parameters such as geometric image, MTF, coupling efficiency, etc. Experimental results show that: The coupling of relay lens has high image quality; the coupling of cone fibers has high coupling efficiency; the performance of grin lens falls in between.
Design of Counting Device for Contact IC Module
Authors: Wang Li Li
Published: December 2012

It is necessary to count number of qualified modules in IC packaging industry. Now popular method is manually done, which is not only inaccurate but also damage for modules. A set of counting device for contact IC module is developed here, in which optical fiber sensor technology is used. The sensor signals are sent to PLC, the number of qualified modules is obtained by logical relation. The operation of the device and the display of results are implemented by the human machine interface. The device has the advantages of simple structure and convenient operation. The device also can ensure reliability and precision during high speed transportation of the IC module tape. At the same time, there are no negative effect on the appearance and performance of contact IC modules.
Synchronization and Anti-Synchronization of the Chaotic Modified Chua's Circuits via a Same Controller
Authors: Leng Jian Cai , Guo Rong Wei
Published: December 2012

Based on the Lyapunov stability theorem, a same controller in the form is designed to achieve the global synchronization and anti-synchronization of the chaotic modified Chua's circuits. The controller obtained in this paper is simpler than those obtained in the existing results, and it is a linear single input controller. Numerical simulations verify the correctness and the effectiveness of the proposed theoretical results
Polarization Changes of Elliptically Polarized Laser Beams Propagating in Slant Path through Turbulent Atmosphere
Authors: Gao Ming , Nan Wei Na , Lv Hong
Published: December 2012

The spectral degree of polarization is studied based on the cross-spectral density matrix of an elliptically polarized laser beam propagating in the slant path through turbulent atmosphere. In addition, the effects of the turbulence on the spectral degree of polarization of an elliptically polarized Gaussian Schell-model beam and a partially polarized laser beam are contrasted and analyzed. And the different elliptically polarized laser beams are investigated.
The Research and Analysis about Attenuation Characteristics of Wireless Signal in Limited Space
Authors: Ma Jun , Ying Xue
Published: December 2012

This paper deals with suitable frequency range for wireless communication between sensor in the sewer and the ground receiver. Soil（Relatively dry soils, partially saturated cohesionless soils and saturated cohesionless soils）, the materials (HDPE and cement)of sewer and the roughness of the wall of sewer are analyzed to obtain the appropriate frequency range is 400-500MHz. Taking into account these above factors, the conclusions as follows (1) In soil, the higher the frequency, the greater the attenuation of the signal. (2)In sewer: in the near region, the higher the frequency, the greater the attenuation of the signal.However, in the far region, the lower the frequency, the greater the attenuation of the signal. Furthermore, the greater the roughness of the wall of sewer, the greater influence on 150MHz and 1800MHz, and the less compared to 450MHz and 900MHz. With the increase of the of sewer size, the influence of roughness decreases markedly.
A Highly Directional Light Emitting Diode Light Guide Bar Based on Concave V-Grooves
Authors: Chen Chi Feng , Lin Bo Han , Kuo Shin Hong
Published: December 2012

A light emitting diode (LED) light guide bar based on concave V-grooves is investigated by using optical simulation software to control the distribution of illumination angle. The structure parameters of V-groove and the distribution of micro-prism are considered. It is found that the illumination angle of LED light guide bar is most concentrated within ±35 degrees.
A Low-Distortion Single Fingerprint Acquisition Optical System
Authors: Wu Zhe Ming , Yang Xiao Pin , Xie Hong Bo , Chen Zhi Hong , Li Fei , Li Bo , Cao Li Li
Published: December 2012

In this paper, a method of correction for the trapezoid distortion of the single fingerprint acquisition system is proposed, which combines nearly telecentric optical path and the inclined plane compensation. According to the method presented, an actual fingerprint acquisition system is designed. There is a prism and two lenses in the system. The resolution of fingerprint acquisition can reach 500dpi. Its optical length is in 45mm, the maximum grid distortion is 0.43%. These meet the standard of the FBI fingerprint scanning system.
The STM32 and Programmable Power Supply Communication in the ELID Grinding Dynamic Control System
Authors: Zhu Yu Quan , Hu Zheng Fei , Ma Bao Ji
Published: December 2012

This paper describes based on the STM32 the dynamic control systems of the ELID grinding oxide film growth process. The system’s structure mainly includes the STM32 controller, DC pulse power source, VMOS circuit and optically coupled isolation circuit. The STM32 controller receives the oxide film thickness value from the host computer. According to the oxide film thickness values, the STM32 controller calls the process library automatically. Based on the process library parameters, the timer outputs the PWM square wave which the frequency and duty cycle can be adjusted, and the serial port output message controled DC power output. The PWM square wave is used to control the on-off of the VMOS circuit, which can be used as the DC converter of the programmable DC power supply, and generates high frequency pulse voltage to control the growth rate of the electrolyte. Finally, the experimental results show that DC pulse power supply output values and the expected output value are consistent.
Embedded Systems to Build Modern Automation and Manufacture
Authors: Liu Xiang Wen , Liu Li Min
Published: December 2012

Modern automation is the foundation of advanced manufacture. And, the modern automation may depend on embedded systems. In this paper, embedded systems, modern automation, advanced manufacture and system development are discussed. As the hot point of IT research and development, embedded systems are important for modern industry progress.
Study of Embedded Power Environment Remote Video Monitoring System
Authors: Wang Yan Qiu , Hu Yi , Yang Xiu Qing , Ye Hai Rong , Pei Chun Mei
Published: December 2012

A design of embedded remote video monitoring was proposed, which took advantage of MPEG-4 compression standard to achieve low bit rate interactive multimedia communications. Characteristics of the system is that users can cut system’s hardware and software as needed, such as removing the function has nothing to do with monitoring, can resolve hardware conflict and optimize system at any time.
Weight to Vision Neural Network Information Processing Influence Research
Authors: Yin Chun Hua , Chen Jia Wei , Chen Lei
Published: December 2012

Many factors influence vision neural network information processing process, for example: Signal initial value, weight, time and number of learning. This paper discussed the importance of weight in vision neural network information processing process. Different weight values can cause different results in neural networks learning. We structure a vision neural network model with three layers based on synapse dynamics at first. Then we change the weights of the vision neural network model’s to make the three layers a neural network of learning Chinese characters. At last we change the initial weight distribution to simulate the neural network of process of the learning Chinese words. Two results are produced. One is that weight plays a very important role in vision neural networks learning, the other is that different initial weight distributions have different results in vision neural networks learning.
Coordination Method on Cloud Computing Clusters
Authors: Xu Zhao
Published: December 2012

This paper makes the case for explicit coordination of network transmission activities among virtual machines (VMs) in the data center Ethernet to proactively prevent network congestion. We think that virtualization has opened up new opportunities for explicit coordination that are simple, effective, currently feasible, and independent of switch-level hardware support. We show that explicit coordination can be implemented transparently without modifying any applications, standard protocols, network switches, or VMs.
The Fusion Process of RS(Remote Sensing) Data Based on Wavelet Neural Network
Authors: Zhang Li Ming , Zhao Xi Qing
Published: December 2012

A wavelet network was constructed through multi-spectral, high-pixel wavelet decomposition of remote sensing image, which replaced the traditional neuron activation function with a nonlinear wavelet system. So we found a data fusion model. Multidimensional information fusion was to integrate the multi-source information characteristics of a high dimensional feature space. With the genetic search based on the natural selection, we combine effective evaluation of fusion accuracy.
Classification of Single Cereal Grain Kernel Using Shape Parameters Based on Machine Vision
Authors: Wu Lan Lan , Wu Jie , Wen You Xian , Xiong Li Rong , Zheng Yu
Published: December 2012

The study was conducted to identify three types of non-touching grain kernels using a colour machine vision system. Images of individual cereal grain kernels were acquired using an camera. Shape feature was extracted from binary and edge images of cereal grain kernels obtained by iamge processing for classification. A total of 13 shape feature parameters, including region area, perimeter, length, width, the maximum radius, the smallest radius etc, were extracted from each kernel to use as input to the Bayesian classifier. Experimental results showed that the Bayesian classifier gave better classification with a calssificaiton accuracy of 99.67% for indica type rice, followed by 98.67% and 78.33% for japonica rice and glutinous rice using training set, respectively. The classification system was developed with Bayesian classifier that achieved an overall recognition rate of 92.22% with training data set and furthermore, a classification accuracy of 90% for the testing data set.
On Implementation of Software Acoustic Cancellation
Authors: Wang Yong Feng , Lv Yao Hui , Cai Hui Zhi
Published: December 2012

The implementation of a software acoustic echo canceller (AEC) on personal computers (PC) is much more difficult than just migration of the well defined algorithms. Software AECs have to deal with the diverse hardware environments, which are usually low-cost and inaccurate, and the software environment, which generally is committed to sharing resources through multi-tasking yet providing no real-time guarantees. Hardware differences lead to sampling rate differences and echo path nonlinearity, while the software environment can cause discontinuity of the audio stream. In this paper, these factors are investigated, and addressed by improved software AEC based on the coloration effect filter algorithm.
A New Variable Step Size LMS Adaptive Filtering Algorithm and its Analysis
Authors: Cai Wei Ju
Published: December 2012

The paper proposed a modified LMS algorithm of variable step size based on a brief analysis of traditional LMS,variable step size LMS algorithm and its improved algorithm.The novel algorithm based on nonlinear functional relationship between the step-size and the error ,increases adaptively at the beginning of the algorithm or when the channel is varying with time ,and it would be smaller during the steady state.So the algorithm has the excellences of faster constringency,little steady error ,tracking the change of the system and avoiding the effects of the noise. The theoretical analysis and computer simulation prove that the algorithm is better than traditional LMS algorithm.
Radio Channel Research in Coal Mine Laneways
Authors: Yang Yong , Li Yu Liang , Li Jing
Published: December 2012

The transmission mode of wireless waves in coal mine tunnel is different from the mode in free space.The multipath propagation of wireless wave is severe in tunnel.As a result,the characteristics study of multipath propagation is very important to the design of wireless communication system in coal mine tunnel.After analyzing the multipath propagation attenuation in tunnel,the statistics of single frequency signal,narrowband signal and broadband signal are obtained.This is the foundation for the application of resisting multipath decline techniques.
Image Restoration Based on Improved PSO Algorithm
Authors: Ye Zhi Yu
Published: December 2012

An image restoration algorithm based on improved particle swarm optimization is presented. The algorithm has the ability of searching fast, and can effectively avoid the local optimal solution. Experimental results indicate that this algorithm is insensitive to image noise, and can be effective to different types of degraded images restoration.
Inter-Harmonic Detection Based on AR Model Spectral Estimation and Nonlinear Optimization
Authors: Zhang Huai Qing , Liu Ran , Fu Zhi Hong , Zheng Ke
Published: December 2012

In order to analyze inter-harmonic parameters accurately, a new detecting method was proposed on the basis of nonlinear optimization and AR modern spectral estimation. The AR model was used to produce a rough estimated value of harmonic parameters and then the signal model was set. By using the optimization algorithm which based on damped nonlinear least squares method and conjugate gradient method, the parameters can be estimated more accurately. The combined method not only solves the problem of inaccurate estimate by AR power spectrum analysis, but also solves the problem of how to set the signal model and to choose initial value. The simulation results show that in noisy environments, this method is effective and the accuracy which is 101 to 104 times higher than the interpolation Hanning window method.
Risk Assessment of Smart Grid Cyber Security Based on Multi-Level Fuzzy Comprehensive Evaluation Method
Authors: Zhang Ke Wei
Published: December 2012

This paper proposes a comprehensive risk assessment index system for Smart Grid cyber security, including five first-level indicators such as entity and environment security, management security, data security, software security and communication security. Every indicator includes specific sub factors. The cyber security risks for Smart Grid are emphatically analysed. The paper integrates AHP with Fuzzy evaluation method, through which the weight of each layer and the risk assessment matrix are determined. Practical case study shows that cyber security level of the Smart Grid is good, but it needs improvement and reinforcement in organization system, data signature, data backup and intrusion detection system.
Research on the Die Steel Cutting Simulation System Based on Intelligent Layout Algorithm
Authors: Zhou Mao Jun , Ma Tian Jiao , Zhao Xiu Jun , Li Shu
Published: December 2012

This paper chooses equal-rectangles dynamic-layout algorithm as die-steel intelligent-layout algorithm, combines with drawing algorithm and .NET visual component to convert three-dimensional entity into two-dimensional model by coordinate rotational projection. We realized intelligent-layout and simulated the process of die-steel cutting in three-dimensional perspective effect. This system offered autonomous-layout mode and intelligent-layout mode. The former simulated the cutting according to producer’s experience. The latter simulated the cutting on the basis of producer’s requirement by intelligent layout algorithm. The application of this system enhances the market competitiveness by increasing the die steel utilization rate and decreasing the enterprise production cost.
The Application of Improved Color Petri Net in Hardware Design
Authors: Liu Peng , Liu Yong Zhi , Wang Chun Jian
Published: December 2012

According to the shortcoming of the color petri net, we have proposed a new method named multi-grade color petri net in order to satify the need of analyzing the hardware design. We for the first time use this method to analyze hardware design. This model can accurately reflect the complex environments of the system and avoid the difficulty occurring often in founding accurate mathematics model by using classical research approach.
A Quantum-Behaved Particle Swarm Algorithm Combined with Chaotic Mutation
Authors: Li Xin Ran , Jin Yan Xia
Published: December 2012

The article puts forward an improved PSO algorithm based on the quantum behavior——CMQPSO algorithm to improve premature convergence problem in particle swarm algorithm. The new algorithm first adopts Tent mapping initialization of particle swarm, searches each particle chaos, and strengthens the diversity of searching. Secondly, a method of effective judgment of early stagnation is embedded in the algorithm. Once the early maturity is retrieved, the algorithm mutates particles to jump out of the local optimum particle according to the structure mutation so as to reduce invalid iteration. The calculation of classical function test shows that the improved algorithm is superior to classical PSO algorithm and quantum-behaved PSO algorithm.
Error Resilience Scheme for Real-Time Video
Authors: Ding Xue Wen , Dagnew Yalemtsehay Gared , Yang Ai Ping
Published: December 2012

The quality of decoded video in erroneous environment depends on efficient detection and concealment of errors. In this paper, an improved error detection technique and a novel temporal error concealment technique for MPEG-4 video are proposed. The proposed detection technique can detect efficiently some transmission error as well locate the exact position of the first error. The proposed temporal concealment method can mask the impairments caused by the detected error significantly with very low computation complexity. Experimental results show the improved detection technique combining with the proposed temporal concealment method can increase the video quality efficiently.