bluuebunny/crossref_metadata_2025 huggingface dataset:
Instructional System Design in Employee Training in the Industrial Area: Take Research on the“Blue-Collar Talent” Project in Xiasha Economic and Technological Development Zone of Hangzhou as the Example
Authors: Yan Xiao Yun
Published: October 2011

Modern educational technologies have been playing an important role in “blue-collar talent” staff quality education and training project in Xiasha Economic and Technological Development Zone of Hangzhou. The theoretical part of this article has explored the features and connections between the educational technologies and instructional system design in the “blue-collar talent” project, and has proposed the employee training model in this development zone according to the constructivism-based instructional system design theory. For this case, this article has made an in-depth analysis on the educational resources and performance evaluation in employee training in the development zone, and has also put forward the corresponding suggestions in accordance with the theme of educational technology in the “blue-collar talent” project.
Mechanism Design for a Dual Cycloid Reducer
Authors: An Seong Eun , Park Sung Hoon , Yang Hyun Dai , Shin Joong Ho , Kwon Soon Man
Published: October 2011

In this paper, we considered a dual cycloid reducer(DCR) which consists of a planet gear with shortened epitrochoid and its conjugate ring gear. The geometric relations between a meshing gear pair were investigated to find the conjugate ring gear profile. It reveals that the three design parameters including the pin radii, the eccentricities, and the trochoid ratios should be identical to each other between meshing gears. Through the computer simulation for two examples, the proposed meshing conditions for the DCR are verified successfully.
Multi-Objective Design of Process Parameter Based on Game Theory
Authors: Li Yan , Wang He Ping , Wang Fu Yu
Published: October 2011

Taking the processing time ,the processing cost per workpiece as objective funtion,two optimization model is established.Multi-objective solving method based on nash equilibrium game model is put forward.Taking the sub-objective function of multi-objective optimization model as game party ,all design variable as strategy set,calculation steps of process parameter multi-objective optimization based on game analysis are founded .As turing technology an example,the result of analysis show multi-objective game design method is effective and feasible
Multi-Texture Mapping on Terrain by the Constraints Based on Random Noise
Authors: Yu Zhi Jing , Pan Xiao , Tian Wei
Published: October 2011

The terrain in the virtual realistic environment will determine the scene generation level of realism. It has been a hot topic in computer graphics. In this paper, the analysis of the current generation of multi-terrain texture mapping method is carried out firstly. At the same time, the advantage and disadvantage of the method is pointed out. A new means is put forward. It is that while the gray images are proposed to provide terrain height field constraints, the image intensity information generated by the random noise is used as constraints to determine the random distribution information on different texture of terrain. At last, a realistic terrain using OpenGL Library Standard in Win32 console application is developed which is close to the natural environment with a high application value.
Necessity and Conditions of Logistics Experimental Training
Authors: Qin Yan Hong , Wei Guang Xing
Published: October 2011

This paper analyzed the current state of logistics personnel and logistics requirements by analyzing a number of shortcomings in personnel training. Then, the paper discussed the necessity of introducing the logistics experimental teaching in the common logistics professional training to achieve effective education of logistics professional teaching. Finally, some important conditions and necessary implementation processes are listed out.
Straightness of U75V 100m Heavy Rail under Deferent Straightening Processes
Authors: Kang Hao , Di Wu , Zhao Xian Ming
Published: October 2011

Temperature of the head, the waist, the bottom and angle of the bottom of same heavy rail lying on the cooling bed is tested continuously, time interval is 5min, which can provide the basis for prebending process. Additionally, the U75V 60Kg/m heavy rail straightening processes using the horizontal and edge roll compound straightening machine is discussed in this paper, and contrasts the cross-section dimension and straightness of heavy rail before and after being straightened, which is important to make certain of optimum straightening parameters.
Testing System for Compressed Natural Gas Engine ECU
Authors: Che Xiao Lei , Zhu Cheng , Wang Nai Dan
Published: October 2011

This paper illustrates an intelligent testing system, designed in the requirement for the testing of compressed natural gas engine ECU. This system is a virtual environment for ECU’s testing and debugging, it provides all kinds of sensor signals, switch signals and various simulated actuators for ECU. PC can configure the system’s settings and receive testing results through USB. When receiving testing datum, PC judges whether ECU is in normal status according to the datum and saves them in files. Consequently automatic testing is realized.
Emission Characteristics Comparison of a Common Rail Diesel Engine Fuelled with Diesel and Biodiesel
Authors: Cheng Wen Ming , Liu Jia
Published: October 2011

Diesel engines are widely used in almost all walks of life and cannot be dispensed with in the near future, and common rail technology is now widely applied in diesel engines for its advantages. An experimental investigation is carried out to establish the emission characteristics of a common rail diesel engine fuelled with diesel and biodiesel produced from cottonseed oil. The emissions measured were carbon monoxide, hydrocarbon, oxides of nitrogen and smoke. From the results, it is found that most exhaust emissions encountered with conventional diesel fuel are reduced with biodiesel fuel, with the exception of nitrogen oxides. From the investigation it can be concluded that biodiesel can be used as an alternative to diesel in a common rail diesel engine without any engine modifications.
Design of the Real-Time Autofocusing System for Collimator with Long Focus Length and Large Aperture
Authors: Li Xiang , Zhang Xiao Hui
Published: October 2011

Large aperture collimator which has been widely used for calibrating and testing various optical devices plays an essential role in correlative laboratories. As being the basic testing and calibration equipment, the large aperture collimator’s accuracy should be much higher than the device under testing in order to ensure the accuracy of the measurement. However, the process of adjusting the collimator is extremely complicated due to the collimator’s large aperture and long focal length. So it is difficult to ensure the measurement’s quality and easy to cause the system being vulnerable to the surrounding environment. One of the most common problems is defocus. In order to solve the problem above, this issue presents a new type of autocollimator autofocusing system which uses pentaprism instead of using large-aperture plane mirror, semiconductor lasers as light source and CCD sensor as receiver. The system is smaller, lighter, and more convenient when using. The computer simulation shows that the autofocusing system’s resolution could reach the accuracy of 40μm. If we use the relevant algorithms to execute the sub-pixel scanning, the resolution could reach the accuracy of 10μm. It shows that the system could satisfy the required testing precision of testing large aperture optical device.
All-Wheel Steering Technology and its Development Prospects of Wheeled Vehicles
Authors: Liu Xi Xia , Yuan Lei , Jin Yi , Wu Di
Published: October 2011

The article introduces the all-wheel steering technology development process and its characteristics of the wheeled armored vehicles. The article analyses the basic system components and the working principle of all-wheel steering system. All-wheel-steering technology can be implied to improve vehicle lateral dynamics, enhance vehicle active safety of wheeled armored vehicles. It is the development of all-wheel steering system which combines the active chassis control systems to form a modular mobile platform organically.
Research on the Idler Spacing of Belt Conveyor
Authors: Guo Yong Cun , Cheng Gang , Hu Kun , Wang Zhu Fen
Published: October 2011

Belt conveyor is widely used in mine, coal, chemical industry, ports, and power plants. It’s one of the significant devices of continuous conveyor. Roller is a crucial component with regard to belt conveyor system, which supports belts and cargos. In the design of the belt conveyor, a third of major consumption went into rollers. The critical consideration for minimum cost, which including operating, manufacturing, maintenance expenditure, is the selection of idler spacing. For optimization purposes, the optimum pitch between the rollers is regard as more decisive variable, especially for minimizing consumption and reducing rollers’ number than other various factors. This paper discusses the idler spacing to proceed from original technical first, secondly analyzes the effective factors in detail and then deduces rational arrangement mathematical expressions of idler spacing. Simultaneously, combining with the corresponding parameter, we draw up the hierarchical layout figure of idler spacing distribution through the calculation expression. It’s the optimal option of idler spacing that providing an outstanding reference in the actual production.
Research and Application of Machinery Balance Based on Pro/E Behavioral Modeling
Authors: Xie Ying Xing , Jin Zhi Gang
Published: October 2011

Using the traditional method of calculating the dynamic balance of mechanical design optimization, the efficiency is not high and the calculation process is complex, and it’s also prone to miscalculation. Pro/E behavior modeling allows designers greater control over the size of components to meet design requirements. In this article, the author try to solve a typical problem of balancing mechanical part through the use of Pro/E behavior modeling techniques. A new research and practice of Pro/E module to optimize the design of behavioral modeling is explored and practised.
Optimize Quenching Process Parameters of 20CrMnTi Steel Based on Response Surface Methodology
Authors: Liu Chun Jing , Tang Dun Bing , He Hua
Published: October 2011

20CrMnTi steel is usually employed in the fabrication of wearable parts subjected to medium dynamic load, such as change gear, gear shaft, cross pin end, etc., which are extensively adopted in the automobile industry. The stability of hardness ability and strength ability of 20CrMnTi steel are important performance in producing gear steel. For the sake of researching the effect of austenitizing temperature and holding time on the quenching hardness and tensile strength, the central composite design, response surface method and multi-objective optimization are carried out to optimize the operating variables viz. austenitizing temperature and holding time. The results indicate that the optimum conditions are austenitizing temperature of 910.54°C and holding time is 0 min. Meanwhile, the predicted values of quenching hardness and tensile strength are not less than 49.19 HRC and 1444.29 MPa.
Design of the Control Circuit of C516 Vertical Lathe on PLC
Authors: Cui Xiu Min
Published: October 2011

C516 vertical lathe control circuit uses relay control method, which has disadvantages including large size, complex wiring, high failure rate, and maintenance difficulties. To solve these problems, designing a C516 vertical lathe control circuit based on PLC,. Also describes the electronic requirements of the control circuits, basis of PLC selection, the hardware connection and software design. Practice has showed that the use of PLC control circuit is simple, reliable and highly improves the production efficiency.
Study on Design of Intelligent Decision Support System of Engineering Equipment Repair
Authors: Zhang Ming , Yu Jiang , Wang Min Hua , Qi Chun Ying
Published: October 2011

By introducing ES (Expert System) of AI (Artificial Intelligence) and KP (Knowledge Processing), etc. into DSS (Decision Support system), the study on design of IDSS_EER (Intelligent Decision Support System of Engineering Equipment Repair) is discussed in detail combined with the characteristics of EER (Engineering Equipment Repair).To start with, the research status quo and analysis of IDSS problems are analyzed and the traditional design problem of IDSS is improved in the system structure and system function of IDSS with a clear aim. Finally, the design and development of IDSS_EER are given a particular description. The system design embodies the strong points of the qualitative and quantitative analyses and can be achieved theatrically and technically. Simultaneously, the system provides the man-in-the-loop support and avoids the intelligent blindness.
Study of the Effects of Shearer’ Kinematic Parameters on on-Way Distribution of Dust on Coal Face
Authors: Li Xiao Huo , Liu Shu Ming , Huang Zhi Long , Du Wei
Published: October 2011

In order to research the effects of shearer’ kinematical parameters on on-way distribution of dust on coal face, according to the theory of suspension gas-solid two-phase flow and the theory of cutting dust formation, mathematical model of on-way dust concentration was established, methods of determining parameters were given, dust migration was simulated by using the discrete phase model (DPM) in FLUENT, on-way distribution regularity of dust was found. According to calculation of the quantity of cutting dust at different hauling speed and different rotational speed of drum, dust migration was simulated and migration regularity was showed as follows: dust concentration of every point on a coal face increased as hauling speed decreased or rotational speed increased. In addition, with rotational speed increased, the position of concentration maximum moved a little along downwind.
An Efficient Virtual Cam Design and Manufacturing System for Education
Authors: Han Liu , He Ping
Published: October 2011

A cam design and manufacturing simulation system is developed for education. The system consists of some modules which can be easily extended or updated. In the design module, the profile of disc cam is generated by defining some parameters – rise allowable pressure angle; return allowable pressure angle, the radius of curvature of cam profile etc. And the kinematics analysis of cam is also calculated in this module. Then the profile is transferred into CATIA for generating a three dimensional geometry of the cam, and NC program is generated. Last, the NC program is verified by Yulong NC simulation system.
Application of LOGO! and Frequency Converter in the Water Supply Equipment of Residential Communities
Authors: Wang Yao Cheng
Published: October 2011

In order to solve the problem of constant-pressure water supply in high rise residential buildings, to fulfill the low power, low-cost demand, here I propose LOGO! And a water supply equipment controlled by frequency converter. By collecting field measurement signals through the pressure sensor together with LOGO! Logic control signals, this equipment can change the frequency and voltage of the inverter, control the pump's rotation rate and finally, meet the constant-pressure water supply demand. This paper also describes the hardware circuit and the software design of LOGO! in detail. Practice has proved that: The frequency converter and the LOGO! control are highly reliable, easily operated and conveniently maintained. Therefore the object of energy saving can be achieved successfully.
The Improved Genetic Algorithm for Balancing Mixed-Model Assembly Line
Authors: Tang Qiu Hua , Liang Yan Li
Published: October 2011

Mixed-model assembly lines are become more and more important by producing different models of the same product on an assembly line. Aiming at the existing mixed-model assembly line balancing problem, first, two important objective functions for minimizing cycle time and workload variance were provided, and mathematical models were established. Furthermore, in order to obtain the optimal or near optimal solutions, an improved genetic algorithm was proposed with combined precedence graph. Finally, the experiment results illustrate the feasibility and validity of the proposed improved genetic algorithm.
Shaping Law and Motion Design in NC-ECM under Effect of Twiste Angle
Authors: Wu Rui , Zhang Dan Wen , Sun Juan
Published: October 2011

The twiste angle has a great effect on shaping law and stability of Numerical Controlled Electrochemical Machining (NC-ECM) process. In order to avoid the disadvantages caused by twiste angle, a methode of study shaping law by dispersing cathode working face in NC-ECM was proposed, and a mathematical model of the shaping law with the effects of twiste angle has been established in this paper. The mathematical model disclosed the relationship of twiste angle β, feeding velocity vf and thickness of removal material h in NC-ECM. Theoretical and experimental results show the the mathematical model of shaping law described in this paper can be considered as a useful reference and is helpful for the analysis of the NC-ECM and general ECM process.
Superheated Steam Temperature Control Based on Improved Recurrent Neural Network and Simplified PSO Algorithm
Authors: Ma Liang Yu , Ge Yin Ping , Cao Xing
Published: October 2011

Coal-fired power plants are facing a rapid developing tide toward supercritical and ultra-supercritical boiler units with higher parameters and bigger capacity. Due to the large inertia, large time delay and nonlinear characteristics of a boiler’s superheater system, the widely-used conventional cascade PID control scheme is often difficult to obtain satisfactory steam temperature control effect under wide-range operating condition. In this paper, a predictive optimization control method based on improved mixed-structure recurrent neural network model and a simpler Particle Swarm Optimization (sPSO) algorithm is presented for superheated steam temperature control. Control simulation tests on the full-scope simulator of a 600 MW supercritical power unit showed that the proposed predictive optimization control scheme can greatly improve the superheated steam temperature control quality with good application prospect.
Temporal Feature Characterization via Dynamic Hidden Markov Tree
Authors: Zhang Yin Hui , He Zi Fen , Zhang Yun Sheng , Xing Wu
Published: October 2011

We present a novel multiscale dynamic methodology for automatic machine vision inspection aiming at characterizing temporal features of tobacco leaves. The image sequences of tobacco leaves are transformed from RGB color space to L*a*b* color space, which provides a uniform perceptual difference measure. The image sequences are then represented by a multiscale Dynamic Hidden Markov tree (DHMT), which models not only inter and intra scale dependences of wavelet coefficients, but also temporal dependences of foreground/background observational properties. Experimental results demonstrate temporal consistent mean and covariance values of model coefficients in a* color channel.
Vehicle-Classification Based on Edge Extraction and Background Difference
Authors: Yang Chan , Dai Zhong Jian
Published: October 2011

The real-time vehicle classification plays an important role in Intelligent Transportation System (ITS). How to effectively improve the accuracy rate and the speed of the vehicle classification is still a hot research issue, the classification algorithm has to be effective but simple. In this paper, a vehicle detection algorithm based on edge-based background difference and region-based background difference is proposed. This algorithm can extract the moving vehicle completely, eliminate vehicle shadow effectively, and it is still significant despite the variations of illumination and weather conditions. The algorithm is simple with low computation quantity and suitable for real-time system. In the feature extraction process, the feature vector can be obtained in short time. Support vector machine (SVM) is also discussed in the classification process. The experimental result shows that the system can accurately recognize the vehicles.
Vibration-Based Structural Damage Identification Using Grey Forecasting Model
Authors: Chen Wei Zhen , Wang Bing Wen , Huang Xiao Yan
Published: October 2011

Structural damage is too difficult to identification. In this paper, a new method using grey forecasting model to identification the structural damage with past and present data is proposed. Based on the last few years of modal parameters, structural parameters including stiffness and mass of the structural were further predicted the trend using grey forecasting model. Here proposed large structure systems with natural decay and unnatural decay. Natural decay modal parameter can be get from the grey forecasting model, compare with the modal parameter identify currently, by a set value to analysis structural damage. Experimental results verify the theoretical analysis.
Application of Optimal Fitting in the Static Thrust Line Measurement of Solid Rocket Motor
Authors: Zhang Chun Fu , Yan Qi Jin , Zhang Jun
Published: October 2011

This paper takes a certain solid rocket engine as the research object, and studies the optimal measuring techniques of static trust line based on coordinate conversion. A simulation was taken to measure the thrust line of a rocket motor which has concave arc-paraboloid structure. The experiment proved that the technique proposed in this paper provided higher measuring efficiency and better accuracy.
Brief Introduction of Brake Line Pressure and Brake Torque Transmission Model
Authors: Wang Ren Guang , Wang Bin , Sun Han Wen
Published: October 2011

If static model of brake pipe pressure and torque model were used in brake system analysis and neglect their dynamic performance, it could cause bigger difference between simulation results and real condition. Some main dynamic models from experiments research are presented with brief introductions.
Kinematic and Modal Simulation Analysis of the Bionic Eye Based on Spherical Parallel Mechanism (SPM)
Authors: Luo Jun , Guo Qi Ming , Li Heng Yu , Huang Chao Jiong , Xie Shao Rong
Published: October 2011

In order to realize stable tracking under bumpy environment, the robot bionic eye constructed by spherical parallel mechanism with 3 DOF is designed based on the characteristics of human being’s eyes. ANSYS and ADAMS are utilized to conduct modal and kinematics property analysis respectively. According to the result of ANSYS modal analysis, the structure highly meets the demands of function and reliability, which lays the foundation for optimization and bump-resistance design. Through ADAMS kinematics analysis, displacement, velocity and acceleration curves of mechanism end effector were obtained, which provides reference for motion control and optimization design.
Dynamic Location Allocation Optimization for PDP Panel Aging Stereoscopic Warehouse
Authors: Zhang Jian Qi , Bao Fu Min , Zhang Jian Feng
Published: October 2011

To optimize the storge and retrieval process for Plasma Display Panel (hereafter abbreviated as PDP) panel aging, one dynamic cargo location allocation method is proposed, and one access time model is also established to achieve the shortest location allocation for the PDP panel aging steroscopic warehouse based on expert system. The constraints of the optimization model include redundancy requirements of steroscopic warehouse, PDP panel aging stacker running speed, time requirements, in-out warehouse strategy requirements and so on. Tests show that the dynamic location allocation system of the PDP panel aging steroscopic warehouse based on expert system is of high stability and can save energy consumption and time consumption in the access process, thus meets the actual requirements of production.
Study on the Mathematical Simulation of Galvanic Coupling IBC with Different Signal Transmission Paths
Authors: Zhang Kai , Song Yong , Kang Bang Zhi , Shang Fu Zhou , Hao Qun
Published: October 2011

The mathematical simulations of the galvanic coupling intra-body communication (IBC) with different signal transmission paths have been introduced. Firstly, a galvanic coupling IBC circuit model was developed and the transfer function was derived. Secondly, the corresponding parameters were discussed. Finally, the signal attenuation characteristics of the galvanic coupling IBC were measured along the different signal transmission paths of the actual human bodies, while the corresponding mathematical simulations based on the proposed transfer function were carried out. A close agreement between the simulation results and measurement results has been demonstrated.
Study of Vehicle Engine Transient Emissions
Authors: Fu Hui Lin , Zhou Yu Cai , Hou Zhi Xiang , Zuo Yi
Published: October 2011

In this paper, the transient emissions from vehicle engines was studied, measurement methods and corrections required for higher precision measurements of transient indirect emissions was discussed. Various operating conditions such as cold start, constant torque increasing speed, constant torque reducing speed emissions were considered and the corresponding emission characteristics were obtained and analyzed.
Automobile Stamping Parts Quality Inspection and Analysis Based on ‘Geomagic Qualify’ Software
Authors: Zhang Hong Yuan , Bi Lei , Zhang Hao
Published: October 2011

For the automobile stamping parts quality inspection problem, this paper discusses the advantages and disadvantages of the contact measurement method and non-contact measurement method. It adopts non-contact photography-type scanner to obtain stamping parts point cloud, and compares and analyzes the automobile stamping parts point cloud and digital model based on ‘Geomagic-qualify’ software. In order to obtain accurate comparison result, it adopts alignment methods like benchmark feature surface, best fit, and RPS, etc. and finds out that RPS alignment method can obtain the values that are mostly approximate to the practically measured values.
Design on Piezoelectric Converter for Electronic Safety System
Authors: Xiao Hong Bing , Xing Su Xia , He Fei Yun
Published: October 2011

Safety, environmental protection and energy saving are three main measures of development level of modern automotive technology, where safety is in the first place. With people's living standards improvement, more and more users will choose the higher configuration, safer cars. These promote a high-performance automobile airbag system development. Ignition system is a key component of the airbag. Because of reliability, accuracy and other limitations, the existing airbag ignition system doesn’t work well. In this paper, a high-voltage piezoelectric converter used in car airbag ignition systems is discussed. It is the combination of safety and environmental protection, and improves the reliability and accuracy. The solution includes conversion circuit model of piezoelectric ignition system, frequency characteristics of piezoelectric transducer, quantum-based control technology for optimal efficiency of transformation and a starting control design of automobile airbag ignition system on piezoelectric transformer. The experiment results verify the correctness of design.
Error Analysis for Correlation Algorithm Based Servo Valve Frequency Characteristic Measurement
Authors: Chang Hua Yao , Wang Jun Zheng , Zhao Jiang Bo , Wang Shou Kun
Published: October 2011

A fault diagnosis based on bond graph model is proposed for hydraulic variable pitch system. Because the knowledge representation of bond graph model can provide information of cause and effect between components, a bond graph model of hydraulic variable pitch system is given above rated wind speed. A fault tree, using cause and effect analysis by back propagation, is developed. Qualitative value of parameters is assigned and the fault source is detected by analyzing boundary parameters of fault tree. Comparing with quantitative fault diagnosis based on model, the bond graph fault diagnosis is more flexible and has good completeness.
Experimental Research on a Certain Light Truck Cab Suspension System Effect on Ride Comfort
Authors: Dai Chao , Liang Ji Hui
Published: October 2011

Ride comfort is one of the main using performance items and competitiveness index of the automobile. This paper carries out shock absorption performance experiment for a certain light truck cab suspension system to study the shock attenuation rate of the four suspension points of the cab when it is under no-load and full-load status running with speed of respectively 40，50，60，70，80 km /h, as well as under the idle speed status. The result shows that the shock attenuation rates of the front cab suspension points under various conditions are low. And the shock attenuation rate of the back cab suspension points at Z direction is low. Front and back cab suspension points have no attenuation to low frequency shock. It is suggested that the cab suspension rigidity needs to be re-matched.
Study on Balance Scheduling Based on the Gasholder Level Prediction for Blast Furnace Gas System in Steel Industry
Authors: Liu Ying , Zhao Jun , Lv Zheng , Wang Wei
Published: October 2011

A balance scheduling method based on gasholder level prediction is proposed for the byproduct gas system in this study. First, a class of Gaussian process regression is presented to construct the prediction model, in which a conjugate gradient algorithm is then designed to optimize the model parameters. A reasoning calculation is designed to obtain the gas adjustment amount for the system balance that sustains the whole system security. To verify the quality of the proposed method, the practical data coming from Shanghai Baosteel are employed and the experimental results indicate that the prediction for gasholder level provides the scientific guidance for the energy utility.
The Design of Electric Power Optical Cable Circuit Automatic Monitoring System Based on PC Computer
Authors: Song Bin , Gao Wei Dong
Published: October 2011

In view of the increasing scale of electric power optical cable and the problem that it is difficult to ensure the quality of the line, combining the actual situation of power system, using OTDR, program-controlled optical switch, PC computer to form a electric power optical cable circuit automatic monitoring system. The design make use of PC computer to control the starting and stopping of OTDR and which channel of program-controlled optical switch is to be guide circuited and receive the data of OTDR to detect the malfunction spot of fiber cable. The system provides an advanced maintenance measure for electric power optical cable, reducing the duration for repair of fiber cable troubles, can be widely used in electric power optical telecommunication network.
Research about Separation of the Surface Geometry Error for Large-Scale Holes Based on Wavelet Transform
Authors: Xie Wen Juan
Published: October 2011

In order to meet high accurate measuring of geometry error for large-scale holes, an non-contact measuring method used laser probe is presented. According to the characteristics of holes’s actual surface composited by multiplefrequency component. in order to accurately extract the various types of error signal，in the analysis of the traditional digital filter algorithm and wavelet transform through the experimental analysis of the steps of wavelet filter decomposition, and extracte integratedly the surface form error, surface waviness and surface roughness, to meet the measurement requirements of large-scale holes. The measuring system has the characteristics of simple, practical, reliable, and anti-interference.
Research on the Magnitude Time Series Prediction Based on Wavelet Neural Network
Authors: Chen Yan Lan , Chen Yi , Huang Qing
Published: October 2011

Based on the fundamental principles of the wavelet analysis combining with BP neural network, the paper can obtain the minimum embedding dimension and delay time. According to the chaos theory, the phase space of the magnitude time series can be reconstructed by Takens theorem. The paper uses wavelet neural network to train and test the nonlinear magnitude time series in the reconstructed phase space. The simulation results show that the predictive effect of the magnitude time series is remarkable and the predictive performance of single-step prediction is superior to that of multi-step prediction.
A Rotor Flux Observer Based on Nonlinear Quadrature Double Compensation
Authors: Fan Bo , Li Xing , Pu Jie Xin , Ma Jian Wei , Zhang Ju Wei
Published: October 2011

In order to solve the problem of integration saturation drift and hardship in compensation quantity calculation exist in rotor flux observation of induction motor, a rotor flux observer based on nonlinear quadrature double compensation method is presented in this paper. The quantity of compensation is determined dynamically according to the quadrature level between flux and back electromotive force. Through the order change of compensation and low-pass filter, quick response of flux when signal frequency leaps is realized. The simulation result shows that the method can improve the flux waveform, realize the accurate and swift track of flux.
Reusable Design of CAN Bus Controller IP Core
Authors: Hu Yue Li , Xu Lei
Published: October 2011

Intellectual Property (IP) reuse improves System-on-a-Chip (SOC) design productivity, and helps to meet design quality and time-to-marks goals. In this paper, we present an approach to that we successfully adopted in reusing the CAN bus controller IP core. To describe our approach, a MCU design SHU-MV10 is performed. The CAN bus controller IP core is inherited from the stand-alone controller SHU-MVCAN with few modifications, and is used in the design of MCU SHU-MV10 successfully by adding bridge module. This reusable design method is not only cuts down the design time but also ensure the accuracy.
Solving Collaborative Manufacturing Resources Optimization Deployment Problems Based on Improved DNA Genetic Algorithm
Authors: Nie Shu Zhi , Zhong Yan Hua
Published: October 2011

In this paper, According to the collaborative manufacturing resources optimization deployment problems, designed subsection crossover and subsection mutation based on process code, adopted fitness scaling method and ranking method to select operators, proposed an improved genetic algorithm based on DNA computation for solving the resources optimization deployment problems, so that the offspring are better able to inherit the good features of parent. Through simulation, tested the designed algorithm performance; by comparing with conventional genetic algorithm test results, it proved the validity of the designed algorithm.
Solving Decision Problems with Mathematical Expectation
Authors: Zhang Mei , Wen Jing Hua
Published: October 2011

Mathematical expectation is one of the important digital characters of the random variables. Many decision variables in decision problem are random variables; it is difficult to define their concrete distribution, while we can use their mathematical expectation to resolve decision questions. The applications of mathematical expectation in decision question were analyzed by example from two aspects of project contract decision and obtain employment decision.
Spectral Properties of Broadband Pumped Optical Parametric Amplification
Authors: Xu Hai Bin
Published: October 2011

The spectral properties of broadband pumped optical parametric amplification (BPOPA) are investigated theoretically. General mathematical expression to describe the relationship between the pump bandwidth (BW) and the parametric BW is achieved. There exist broaden and compression point of parametric spectral BW by observing the figures origin from obtained expression. Results obtained show good accordance with published experiments and the numerical simulations, which is calculated by means of three-wave mixing equations. The results are helpful for optimization of broadband pump-based OPA and optical parametric oscillation.
Comprehensive Testing Instrument on External Characteristics of Magnetically Controlled Shape Memory Alloy
Authors: Lu Jun , Lin Cheng Wu
Published: October 2011

Magnetically controlled shape memory alloy (MSMA) is widely concerned because of its superior characteristics in the field of functional materials. The application of MSMA materials base on experimental study, thus a comprehensive testing device of MSMA external characteristics is developed in this paper, which can simultaneously measure deformation, pressure, temperature and magnetic field. Experimental and testing device of the instrument are analyzed and designed. The curves between MSMA deformation rate and magnetic field, temperature are obtained with the testing device. The experimental results show the device can conveniently test the external characteristics of MSMA materials.
Effect of Porous Structural Parameters on Ultrasonic Attenuation Capacity of Porous Al Alloy with High Specific Strength
Authors: Xu Wei , Tang Xiao Dong
Published: October 2011

Ultrasonic attenuation capacity of porous Al alloy with high specific strength were studied .The results show that it is a light material that have good ultrasonic attenuation capacity between 1 and 8MHz. Ultrasonic attenuation coefficientαof porous Al alloy increases with decreasing pore diameterd,with decreasing porosityPsand with increasing specific surfaceSv.
ADAMS-Based Vibrating Subsoiler System Simulation Analysis
Authors: Xin Li Li , Liang Ji Hui , Qiu Li Chun
Published: October 2011

For the vibrating subsoiler, considering the material acting force, the system is simplified as a single degree of freedom weight-spring-damp model which will simulate the vibrating subsoiler system based on Automatic Dynamic Analysis of Mechanical System (ADAMS). The analysis result shows that the vibrating subsoiler can not perform well under conditions of high vibration frequency and advance speed.
Component Spectrum Recognition for Mixed Gas Based on SVM
Authors: Bai Peng , Ji Juan Zao , Liu Peng , Geng Dao Tian
Published: October 2011

As for the problem that component gas characteristic spectrum lines overlaps seriously in the identification of Mixed Gas, Support Vector Machine is introduced for the identification, and an one-by-one identification methods for Mixed Gas classification based on the binary category identification model based on the support vector machine is proposed in this article. One-by-one category identification is carried out for each mixed gas when the characteristic spectrum lines are overlapped seriously and is transformed in high dimensional space into linear by SVM kernel function transformation. In the experiment for gas component identification of a natural gas, we compare the recognition results affected by different kernel functions, data preprocessing, feature extraction, numbers of training samples and other conditions. The results show that the method has the correct recognition rate of over 97% for the natural gas whose concentration is over 1%, and it has a great promotional value both in theory and practical application.
Development of Ultrasonic Automatic Testing System for Flaws of Rotary Parts
Authors: Ma Hong Wei , Dong Ming , Chen Yuan , Mao Qing Hua
Published: October 2011

In order to conquer the disadvantages of undetection, misjudgment and low-efficiency in ultrasonic A-scan testing for rotary parts, an ultrasonic automatic imaging system was developed, and automatic scan device was specially designed for rotary parts. Moreover, the testing software was programmed by LabWindows/CVI, which achieves the acquisition and processing of ultrasonic signals, and displays A, B, C, D and P-scan image. On the basis of storing A-scan data and transforming non-isotropic resolution B-scan image into isotropic one, P-scan imaging is realized. Medium filtering was applied to A-scan signal and C-scan image and the Signal-to-Noise is improved. The experimental results show that this system has well achieved numeralization, automatization and imaging of ultrasonic testing.
Measurements and Predictions of Steady-State and Transient Temperature Distributions of a Gasoline Engine
Authors: Chen Hai Bo , Yuan Zhao Cheng , Lu Wei , Cai Jin Lei
Published: October 2011

During the design process of Internal Combustion (IC) engine, what is often taken into consideration is the temperature of the important heated parts. The temperature distributions are the primary causes of thermal fatigue in the engine. A combined experimental and analytical approach was followed in this work to study temperature distributions of gasoline engine under steady-state and transient operation condition. Experimental studies were conducted to measure temperatures under a series of steady-state and transient operating conditions. A comparison of the steady-state and transient measurements has been made and the character of transient temperature distributions is concluded. Subsequently, a calculation analysis was conducted to predict the detailed temperature distributions. Solid-Fluid whole conjugated heat transfer method is applied in the numerical calculation, which can take the mutual influence both the fluid flow and the heat transfer into account. The predicted temperatures met well with the measurements. Furthermore, the predicted location of coolant boiling phenomena in the water jacket can be made certain. This can give some suggests for the further observation experiment of boiling heat transfer.
An Intelligent Atrial Fibrillation Wireless Monitoring System Based on Nonlinear Bind Source Extraction Algorithm
Authors: Xu Kai , Shao Ying Hai , Wang Gang
Published: October 2011

The proposed system is designed to monitor patients with atrial fibrillation (AF) in family. This system mainly consists of wireless sensor networks (WSNs), which contains several mobile sensor nodes and coordinator for acquisition of bio-signals, and an embedded computer (EC) for signal processing. The WSNs are responsible to acquire and transmit Electrocardiogram (ECG). The EC is to extract the AF signal using nonlinear blind source extraction (BSE) algorithm. The extracted AF signal is then utilized to intelligently judge whether or not AF is on, based on which the system will send alert information to related doctors via Ethernet. In the meantime, the extracted AF signal is displayed on liquid crystal display (LCD), and then is also sent to relate doctors. The system aims to be low-cost, low-power consumption, small size and long-distance (up to thirty meters) transmission, can be further integrated into other healthcare monitoring system, and is expected to have great potential in family monitoring.
The Study of the Dual-Wavelength Fiber-Optic Temperature Sensor
Authors: Lei Xiao Mei
Published: October 2011

A new dual-wavelength optic-fiber temperature sensor is introduced in this paper. Transmitted probe of this sensor system is designed. LED IR880 and LED IR940 which peak wavelength is 880nm and 950nm are used as the survey light source and the reference light source of the sensor system. So the infection from the changes of the optical fiber transmission loss, the temperature effect of the temperature probe and the optical detector excursion of the sensor can be eliminated. The accuracy and stability of the temperature sensor can be improved and the cost of temperature sensor can be reduced.
Driving Belt Conveyor Based on Long-Term Transmission Inverter
Authors: Lei Shu Ying , Li Ji Sheng , You Guo Dong , Li Hang
Published: October 2011

Conventional inverter drive has been unable to meet the growing power requirements for belt conveyor, according to this situation, this paper proposes the design of using long-range transmission of inverter drive parameter and controlling belt conveyor regardless of the explosion-proof. Based on transmission line theory, this paper established a model of driving line circuit for long-distance transmission, and did the simulating analysis on factors that affects the motor end voltage using MATLAB simulation software. According to the result, the control system for driving belt conveyor based on long-term transmission inverter can transmit the parameters exactly and run reliably, besides, the system can not only achieve energy saving, but also certificate safety and efficiency.
Engine Failure Data Analysis Method Based on Weibull Distribution Model
Authors: Gu Ying Kui , Li Jing
Published: October 2011

The failure data of crank rod system was analyzed by using weibull parallel model on the base of the simple weibull method. The distribution parameters of the weibull parallel model were estimated by using drawing method. The solving process of WPP drawing method was given in detial. Results show that the fitting degree of the failure data in the weibull parallel model is higher than that of the simple weibull distribution model, and it can more accurately described the failure distribution curve of the system in life cycle, which can provide necessary information for engine reliability indexes computation.
Hardware-in-Loop Electronic Throttle System Based on Simulink
Authors: Chen Ning , Zhu Pin Chang
Published: October 2011

The structure and the principle of the electronic throttle control system (ETCS) is elaborated. The electronic throttle (ET) control model is built based on Matlab/Simulink, and the hardware-in-loop simulation on the ET model is processed. The result shows that the hardware-in-loop electronic throttle system have significant means on the automotive electronic teaching and design.
Research of Flow and Pressure Pulsation in Aircraft Deicing System
Authors: Wu Meng Li , Chen Bin , Xing Zhi Wei
Published: October 2011

Aiming at the flow and pressure pulsation caused by the reciprocating pump in aircraft deicing system, two solutions are presented in the paper. First, based on computational fluid dynamics and finite element analysis theory, the assembled ways of rigid and flexible accumulators are applied to absorb vibration in order to inhibit the pulse. Then, the control algorithm for multiple phases of three pumps is used to offset the pulse energy among the pumps. At last, simulation results show that both methods have effectively reduced the pulsation in the aircraft deicing system.
Research on Elasticity Characteristic of Equivalent Bio-Material
Authors: Xie Chi , Chen Shuang , Lin Da Quan
Published: October 2011

To measure the elasticity specificity of equivalent bio-materials with human skin's nature, the static-load pressing method for testing the elastic nature of the equivalent material for human skin is approached in this paper. And it is very important and useful to biomedicine science and engineering that evaluating correctly the mechanical property of the equivalent materials with human skin's nature.
Prediction Model of the Charpy Impact Toughness of Deposited Metals of Welding Materials
Authors: Tong Li Ge , Bai Lu , Ding Hong Sheng , Wang Li , Bai Shi Wu , Sui Yong Li , Yu Jiang Feng
Published: October 2011

Based on artificial neural network (ANN), prediction model of the Charpy impact toughness for automatic welding is built. The input parameters of the model consist of the chemical elements and the diameter of the welding material and the outputs is the average Charpy impact toughness. The ANNs model is established by Visual C++ based on improved back-propagation (BP) arithmetic with momentum coefficients, in which the sample data used are from automatic welding materials for X70 pipeline steel. Based on the prediction model, the influence of chemical compositions, such as C, S, P, Si, Mn, Cu, Ti and Ni on the Charpy impact toughness of welding materials are analyzed. The results show that the influence of metallic elements is significantly greater than the nonmetallic, and the contents of Mn in metallic and the C in nonmetallic have primary effect on the average Charpy impact toughness.