bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research on the Quick Method for 6-DOF Parallel Robot Forward Kinematics
Authors: Zhang Zhao Yin
Published: February 2012

6-DOF parallel robot forward kinematics can be achieved by Newton-Raphson method with more accurancy, but the result depends on the offer of initial value. It can definitely calculate the result by genetic algorithm, however, more evolved algebra is needed to make it more accurate, and sometimes it hardly meets the requirement by concurrent control. This article points to use the result of genetic as the initial value of algorithm, and ultimately make use of iteration to complete the forward kinematics. High accuracy and speed are the main features of this calculation, and another one is interpreting from the implementation point of view, which is very practical and meet the concurrent control through experiment.
Error Compensation of Measurement System Based on Magnetoresistive Sensors
Authors: Wang Wei , Qu Kai , Zhang Xiong Xing , Guo Ying
Published: February 2012

A measurement system based on the magneto-resistive sensor is described and its error factors and influences are analyzed as well. A reasonable and simple approach is presented to compensate the measurement error from Magneto-resistive Sensor output. Firstly, the principle of the new method is illustrated. Secondly, the steps of the error compensation are introduced. Finally, the test is carried out, results are shown that the maximum angle value of deviation is no more than 2° and compensation method can be used in common measurement system based on magneto-resistive sensors.
Mobile Robot Path Planning and Research in the Improved Artificial Immune Algorithm
Authors: Hou Yuan Bin , Wang Wei , Lu Xiao Yue
Published: February 2012

Aim at local optimal problem in the path planning of mobile robot by artificial immune algorithm, it is proposed that the improved artificial immune algorithm of mobile robot path planning. Based on artificial immunity algorithm, the potential function method of an artificial potential field is used in this algorithm, improving randomness of the initial population of the artificial immune algorithm, then the algorithm make initial population turn to evolutionary operation through crossover, variance and selection operator to get optimum antibody. The simulation results showed that this algorithm is easy to get the optimal path, at the same time, increasing the speed of the path planning, and the length of the optimal path planning is less 28.5% compare with the traditional immune algorithm.
A Facile Approach to Increase Conductivity of Polyaniline Nanofibers
Authors: Guo Li , Sun Yuan Bao , Hu Jian Qiang , Huang Zhi Jie
Published: February 2012

We described a facile approach to carrying out secondary doping of polyaniline nanofibers. SEM, UV-VIS-NIR and XRD techniques were used to characterize the secondary doping and de-doping of polyaniline nanofibers. The conductivity of secondary doping and de-doping of polyaniline nanostructure with m-cresol is higher than before secondary doping of it accompany with keeping nanostructure. A new approach to improving electric performance of polyaniline nanostructure was provided.
The Design and Simulation Analysis of Current Amplifier Circuit of Relay Test
Authors: Liu Bai Fen , Fang Xian Wu , Chen Yun
Published: February 2012

This article proposes a practical and reliable design applicable to DC output power amplifier circuit of relay tester. Through theoretical calculation, the author discuss the amplifier circuit can meet the requirement of relay tester to output, and supply the design and simulation analysis of power amplifier circuit, and expatiate the functions of each module of the circuit. The simulation analysis proves that this circuit is a efficient, stable and feasible conversion circuit which can amply energy.
The Design of a 3D Flight Simulation and Monitoring Platform
Authors: Yang Ran , Yan Long
Published: February 2012

A 3D flight simulation and monitoring platform is established based on the technology of 3D terrain rendering, dynamic model drive and data fusion. The platform is supported by a aviation project. The primary purpose of the platform is to monitor and simulate the flight status in real-time. The development process of the platform is introduced and the method of 3D-Terrain is discussed. The simulating and monitoring results show that the platform is available and satisfied requirements. The 3D flight simulation and monitoring platform is also proved to be feasible and reliable.
Study on Improving the Life of Stereolithography Injection Mold
Authors: Lai Hua Qing
Published: February 2012

Molding is one of the most versatile and important processes for manufacturing complex plastic parts. It is a method of fabricating plastic parts by utilizing a mold or cavity that has a shape and size similar to the part being produced. Molten polymer is injected into the cavity, resulting in the desired part upon solidification. The injection-molded parts typically have excellent dimensional tolerance and require almost no finishing and assembly operations. But new variations and emerging innovations of conventional injection molding have been continuously developed to offer special features and benefits that cannot be accomplished by the conventional injection molding process. This study aims to improving the life of stereolithography injection mold.
The Simulation of a Novel Laser Indirect Shock Forming with SPH
Authors: Li Wei , Shen Zong Bao , Hu Yang , Du Dao Zhong , Liu Hui , Wang Xiao , Liu Hui Xia
Published: February 2012

In order to study a novel laser indirect shock forming mechanism which applies laser-driven flyer to load the workpiece, this paper uses the SPH method to study the behavior of laser indirect shock forming and simulate the process of the workpiece forming. The SPH method solves the problem about the mesh tangling encountered in extreme deformation and this paper presents some ideal results and histories. Through comparing the experiment result with the simulating result, it is easy to find that the analysis with the SPH method can predict the final shape of workpiece properly. To some extent, this paper could provide some helpful messages for the study on the novel laser indirect shock forming.
Eddy Current Loss and Shielding Research of the Tank in Power Transformer
Authors: Xu Yong Ming , Du Chao , Meng Da Wei
Published: February 2012

The problem about the eddy current loss which is caused by leakage magnetic field in ultrahigh pressure large capacity power transformer is becoming more extrusive. It is very significant to research the power transformer leakage magnetic field and eddy current loss on the tank wall thoroughly and accurately. 3D finite element model of power transformer leakage magnetic field and eddy current loss is established in this paper, the eddy current loss on the tank wall is calculated and the distribution is analyzed. For the eddy current loss could be reduced by magnetic shielding, new calculation model are established respectively, then eddy current loss on tank wall could be got with shielding. The best size and location of the shielding could be analyzed after changing the height of the shielding, which provided the important evidence to reduce tank wall eddy current loss effectively. The calculating methods have been proved to be accuracy after experiment.
Warp Weave Texture Feature Recognition Based on Autocorrelation Function
Authors: Ma Yun Fang
Published: February 2012

In this thesis, based on the weft organization features parameters analysis results, according to warp yarn arrangement features , apply correlation coefficient and autocorrelation function in weft weave texture feature recognition, establish weft cell image, analysis the weft cell image correlation coefficient, find out the number of weft circle, set up same kind weft cell image of the same phase of weft unit, calculate the warp brightness values of the same kind weft cell image, distinguish the weft points area and warp points area through luminance signal analysis, analyze the tissue points area changes between the adjacent similar weft cell, and determine the location and density of warp yarn. Experiments prove that the Fourier-transform method is feasible and has considerable accuracy.
Thermal Test of a Sealed Air Cooling Local Environment Control Apparatus for Precision Instruments
Authors: Li Hong Cai , Chen Fei Fan , Dong Yong Gui
Published: February 2012

A sealed air cooling local environment control apparatus that can provide constant working environment for precision instruments has been developed. Based on electrical analogy, the thermal network model has been derived, and the parameters of thermal conductance and capacitance in the model were measured in different test conditions. The obtained maximum relative errors between the measured values and the theoretical values are in the range of 0.6% to 6%, which indicates that the proposed theoretical model and the test method are feasible. The obtained parametes can help to understand the heat transfer properties of the apparatus, and the methods can be also as the reference for the test and rapid commissioning of other local environment control apparatus.
Design and Implementation of Manufacturing Execution System (MES) for Automobile Main Gear Reducer Assembly Line
Authors: Huang Dao Ye , Liu Ming Zhou
Published: February 2012

Because of low level of informatization in automobile main gear reducer assembly line, it is proper to put forward Manufacturing Execution system to monitor, control and manager the production assembly line. First, functional requirements and coverage of MES system is investigated. Second, function of the MES for automobile main gear reducer assembly line is described. Third, the results of implementation on the line are discussed. It is proved that the efficiency of assembly line and the field management can be improved using MES system.
Walking Speed Feature Extraction Based on Wavelet Packet Decomposition
Authors: Geng Yan Li , Yang Peng , Liu Zuo Jun , Chen Ling Ling
Published: February 2012

Sufficient sensor information is needed in the control of intelligent lower limb prosthesis. Sensor system includes MEMS Accelerometer and MEMS Gyroscope. The sensor system is installed in prosthetic socket. Walking information is obtained using this system. Hip joint and knee joint motion is measured by Vicon MX system. the angle, velocity and acceleration of Hip joint and knee joint is analyzed. The signal of sensor system is collected by Quarc system. Using the wavelet analysis method, characteristic values is extracted from the measurement signal after errors separation process. The results of experiment indicate that the sensor system has advantages of small size, sensitive response,quick examine,convinence to take with and use and so on. The system is very suitable for the information acquisition.
Effect of Stretching Slenderization Treatment for Microstructure of Yak Hair
Authors: Liu Jian , Weng Yi
Published: February 2012

The changes on microstructure, including cortical cell structure, density and degree of crystalline, of yak hair fiber have been analyzed after the stretching slenderization in this paper. It was found that the cortical cell has been elongated and became thinner, which average length-diameter ratio could be raised from 18 to about 40. By means of ultrasonic separation technology, the effect of stretching on packing action of fiber cortical cells has been investigated. It was proved that the stretching slenderization would improve the structure of yak hair cortex, and cortical cells were packed tighter along the fiber. The density and degree of crystalline also increased as raise of stretching rate. At the same time, the results form tensile test indicated that the fiber physical property would be improved through stretching treatment.
Self-Propagating High-Temperature Synthesis of TiB2-Ti(C, N) Cermets Composite Powder
Authors: Yang Fang , Guo Zhi Meng , Hao Jun Jie , Shi Yong Liang
Published: February 2012

The ultra-fine TiB2-Ti(C, N) composite powders were prepared by self-propagating high-temperature synthesis (SHS) with Ti, BN and C powders as its starting materials. The morphology of the products was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results showed the composite powders were consisted of the mainly phases Ti(C, N), TiB2 and a small amount of TiN phase. With the Ni addition, the brittle phase Ni3B was appeared. SEM results revealed that the composite powders had a uniform particle size, a round grain-shaped structure and a narrow size distribution and the average particle size of which is less than 1μm.
Computational Experiments of Optimizing Transporting Robot Move Sequence in Molds Assembly Using Genetic Algorithm
Authors: Nie Xiao Dong , Yang Yu Jun
Published: February 2012

In this paper, in order to optimize the move sequence of material transporting robot in molds assembly, a mathematic model is established, genetic algorithm is used to search, and computational experiments are proposed. At last, it can find that the recommend genetic algorithm has better effective.
Value Engineering-Oriented Approach to Evaluating Conceptual Design Schemes of Sugarcane Harvester
Authors: Zhu Hong Jun
Published: February 2012

In order to improve agricultural machinery product value in conceptual design scheme evaluation, a novel approach was put forward to evaluate conceptual design schemes in the view of value engineering. Realization of the method was divided into cost estimation and function evaluation. In cost estimation, weighted mahalanobis distance between historical data and estimating product schemes were calculated to express their similarity, their cost attributes were described by different membership functions, exponential smoothing method was selected to get estimation solution; in function evaluation, evaluation assignment was chosen to determine function coefficients of different schemes, by using improved AHP to modify judgment matrix. An example of sugarcane harvester is given to illustrate the validity and feasibility of proposed method.
Schur Decomposition Model Reduction Algorithm of Discrete-Time Singular Dynamical Systems
Authors: Hu Lian Hua , Qiao Yan Fei , Yang Xiao Feng , Mei Gui Jing
Published: February 2012

In this paper, a model reduction for discrete-time singular dynamical systems is investigated. First, by transforming the original systems, the singular systems of impulse models are decomposed into the casual subsystems and the non-casual subsystems, and the reduction problem becomes merely a simplification of the non-casual subsystems reduction. Based on the Schur decomposition and apply Matlab to reorder the Schur forms, the degree of the systems state controllability and observability is scaled by Hankel singular values, and the results show that the controllability and observability of the states which are corresponding to the smaller Hankel singular values are weaker. Based on it, a new model reduction algorithm of discrete-time singular systems is given. Finally, a numerical simulation illustrates the effectiveness of the proposed algorithm.
The Application of Virtual Reality Technology in Product Design
Authors: Zhang Bao , Liu Zhi Feng , Liu Guang Fu
Published: February 2012

The paper introduces the effects of virtual reality (VR) technology on product development and product design for improvement. By analyzing the design and development of baby stroller, the paper demonstrates the preparation of product design and its optimization, product exhibition and experience, the product process and manufacture by utilizing VR technology.
Research on the Lining Monitoring System of Mine Shaft in the Special Strata
Authors: He Peng Li , Zhang Dong Xiao
Published: February 2012

The shaft lining in deep topsoil will be lead to fracture by the vertical additional force, which is caused by the bottom aquifer drainage settlement. Through the establishment of the shaft lining automatic monitoring system, the mechanical state of shaft can be effectively analyzed and the overall safety can be valuated. When monitoring data show that the shaft lining will be fractured, the rocks, management measures can be timely taken to prevent more damage by a ruptured shaft. In the process of ground grouting treatment to prevent shaft fracture, the monitoring data can be as shaft lining stability and grouting parameter adjustment basis, to ensure safety and grouting reinforcement effect.
A Study of Turbine Engine PID Control Method Based on Closed-Loop Gain Shaping Algorithm
Authors: Zhu Jie Tang , Zhang Shi Ying , Chen Jiao , Luo Lei , Gao Peng
Published: February 2012

This paper aims at the application of closed-loop gain shaping algorithm in turbine engine PID control. It introduces calculation examples, showing how to build a PID controller through parameters with physical significances; it also establishes mathematic models of turbine engine and fuel supply system, in order to test the performances of the PID controller, based on the comparison between PID controllers of series type and closed-loop gain shaping. Simultaneously, simulations are conducted using Matlab. The Simulations indicate no overshoot, proper control time as well as a narrow range of amplitude of oscillation. Therefore, the study succeeds in proving that the closed-loop gain shaping PID controller has excellent performance and good robustness, which is particularly useful for turbine engine control system.
The Influence of the Photovoltaic Effect on the Ferroelectric Properties of BaTiO3 Thin Film
Authors: Wang Qiang , Li Yan , Fu Ji Song , Wu Song Jie , Liu Jian Nan
Published: February 2012

This article simulates the ferroelectric properties of a model of BaTiO3 thin film sandwiched between metal electrodes at the state of short circuit. We discussed the change of the depolarization and the Photocurrent generated within the film under UV irradiation. Comparing the polarization before and after the irradiation, the influence of the photovoltaic effect on the ferroelectric properties of BaTiO3 Thin Film is gained.
Research on the Embedded Coefficient in Compressive Stress
Authors: Dong Da Shan , Gan Mao Chun , Teng Yuan Yuan
Published: February 2012

Steel plates connected together are mutually constrained when the member gets elastic buckling failure. A factor χ, embedded coefficient, is used to illustrate the degree of restriction of the flange on the web in GB/T3811-2008’Design Rules for Cranes’. In this standard, the value of the embedded coefficient has been preset in pure bending and pure shearing, while not clearly in compressive stress. In this paper, numerical method is adopted to discuss χ in such load condition.
Mobile Water Level Meter System
Authors: Xu Guang Xiang , Zhang Yan Yan , Gao Wu
Published: February 2012

By applying the principle of the closed tube, pressure measurement and ultrasonic water level measurement instruments, a kind of mobile and unfixed zero point water level meter system was introduced and designed in this paper to overcome the deficiency of its difficulty in measuring the arbitrary point water level by the currently fixed water level meters. The mobile water level meter system can measure arbitrary point water level precisely and rapidly in a certain range. Experiment testing has already shown the feasibility of the developed water level meter system with the characteristics of light and handy, easy fabrication and learning and can thus be widely used in the study of hydraulic model and physical model experiments.
Monitoring Leaf Nitrogen Concentration in Wheat Based on Spectral Parameters from HJ-CCD Data with Stepwise Regression Method
Authors: Tan Chang Wei , Jin Xiu Liang , Wang Jun Chan , Tong Lu , Zhu Xin Kai , Guo Wen Shan
Published: February 2012

Nitrogen is a crucial parameter in maintaining crop health and predicting crop yield. It is possible that leaf nitrogen concentration (LNC) was quickly and non-destructively estimated by remote sensing method. The objective of this experiment was to develop a sensitive spectral index for monitoring LNC in wheat based on HJ-CCD data. In this study, we assessed several common spectral indices based on stepwise regression methods with the determination coefficient (R2) and root mean square error (RMSE). The results indicated that compared to other spectral index, the spectral index of 1.65SIPI-1.35PSRI was the most positively related to LNC (R2 = 0.6328, p<0.01), and the model for monitoring LNC based on 1.65SIPI-1.35PSRI was with the RMSE of 0.685 g.m-2 (p<0.01), and was significantly better than the models adopting other spectral indices. In conclusion, this study confirmed the feasibility of utilizing 1.65SIPI-1.35PSRI derived from airborne remotely sensed data to monitor LNC in wheat.
Enrichment, Accumulation, and Potential Ecological Risk of Lead in the Sediments of Love River Mouth, Taiwan
Authors: Chen Chiu Wen , Chen Chih Feng , Dong Cheng Di
Published: February 2012

Major objectives of this study are to evaluation the enrichment, accumulation, and potential ecological risk of lead (Pb) in the sediments of Love River mouth, Taiwan. Ten monitoring stations were installed near the mouth of Love River to collect sediment samples for analyzing Pb. Results of laboratory analyses show that concentrations of Pb in the sediments are between 44 and 105 mg/kg with an average of 74±19 mg/kg. The spatial distribution of Pb reveals that the Pb concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor region. This indicates that upstream industrial and municipal wastewater discharges along the river bank are major sources of pollution. Results from the enrichment factor (EF) analysis imply that the sediments can be characterized as moderately severe to severe degree of Pb enrichment. Results of geo-accumulation index (Igeo) analysis indicate that the sediments can be characterized as moderate to moderately strong degree of Pb accumulation. However, results of potential ecological risk index indicate that the sedimentation at Love River mouth has the low ecological potential risk.
Electronic Scale Automatic Calibration System with Image Identification
Authors: Huang Jie , Zheng Yong Jun , Bai Wei , Ding Jia Jun
Published: February 2012

A new automatic calibration system for electronic scale with image identification is developed. The system is composed with mechanical part, pneumatic components, PLC, USB camera and computer. Labview is the developing platform with user interface, PLC is controlled by Labview via OPC configuration to load or unload the standard weights, image machine vision technology is used to automatic recognize the LED char displayed on electronic scale.
Effects of Fat on Relationship between Particle Size and Physical Properties of Cross-Linking Yogurt by Purified Transglutaminase from Streptomyces mobaraensis DSM 40587
Authors: Zhang Li Li , Zhang Lan Wei , Han Xue , Li Yan Hua
Published: February 2012

The purified TGase produced by Streptomyces mobaraensis DSM 40587 from high salt medium was applied to whole and skim milk yogurt. During yogurt fermentation, no negative effect of TGase on fermentation time was found. Protein cross-linking by TGase was enhanced at varying concentrations from 0 to 5 U/g protein, resulting in a increase of apparent viscosity and decrease of syneresis. Furthermore, texture parameters were improved. However, extensive cross-linking resulted in too big size of the aggregates. The formation of these polymers resulted in a coarse texture of yogurt. Fat had no impact on the apparent viscosity and texture parameters, but significant changes in cross-linking of protein, syneresis and the sizes of the aggregates. From the range of TGase concentrations examined for properties of yogurt, the optimal level of TGase for skim milk yogurt was 1 U/g protein; however, for whole milk yogurt was 3 U/g protein.
Fluctuating Pressure Calculation during the Progress of Trip in Managed Pressure Drilling
Authors: Wang Shu Jiang , Cao Qiang , Bo Kang
Published: February 2012

The calculation of fluctuating pressure is necessary during the progress of trip in the managed pressure drilling, because the bottomhole pressure should be constant during the progress of trip. The prediction model of the fluctuating pressure during the progress of trip was established based on the unsteady flowing theory. The actual application state of the prediction model was presented through a computational example. By the comparison between the computational result and the field test result, the computational result matches the field test result very well, which indicates the rationality and the accuracy of the model.
Experimental Study of Large-Shell-Diameter Heat Exchangers with Small-Helix-Angles Non-Continuous Helical Baffles
Authors: Zhang Lu Hong , Xia You Mei , Jiang Bin
Published: February 2012

In this paper, experimental performance comparison of shell heat transfer is made between shell and tube heat exchangers (STHXs) with segmental baffles and non-continuous helical baffles. The helical angles contain 7°, 13°, 25°, which are smaller than the experiment made before. The experiment is carried out in the large-scale experimental equipment with the inner shell diameter, 500 mm and effective tube length, 6 m., which is larger than the previous experimental setup in the scale. The results indicate that the shell side heat transfer rate per unit pressure drop of non-continuous helical baffles is higher than that of traditional segmental baffles at the same volume rate. It is found that with the helical angle increasing, the shell side heat transfer rate decreases.
Intelligent Operation and Control of Refrigeration Craft in Cold Storage
Authors: Sun Ying
Published: February 2012

In this paper, we discuss the difference between intelligent and non-intelligent system, and analyze some problems in the development and research of auto-control system in the cold storage. These problems involve engineering survey, predictive control of technical parameters, control reliability of machinery equipment, local control and global control. And the methods of artificial neural networks, genetic algorithm and least square are put forward to resolve them.
MEMS Technology in the Fabrication of Fluxgate Sensor with Micro-Solenoid Cores
Authors: Lei Jian , Lei Chong , Zhou Yong
Published: February 2012

In this paper, we presented a MEMS-based method of manufacturing micro fluxgate sensors. Micro-solenoid coils acting as excitation and sensing elements of the sensors were fabricated by MEMS technology and thick photoresist-based UV-lithography. Different processes were used to fabricate the magnetic cores made of different soft magnetic materials, respectively. Permalloy core was formed by electroplating, whereas gluing and chemical wet etching were adopted in the fabrication of the nanocrystalline alloy core. The two micro fluxgate sensors were characterized by a magnetic field measuring system. The experimental results showed that the micro fluxgate sensors possess high sensitivity, wide linear measuring range and low power consumption.
Lateral Displacement Control Using Iterative Learning for Intermittent Web Transportation
Authors: Zhang Rui , Tao Bo , Quan Jian Zhou
Published: February 2012

A lateral displacement control method of a moving web using an offset-pivot guide system for intermittent web transportation is presented in this paper. The dynamics model of the offset-pivot guide system is investigated, and the factors resulting in the lateral displacement of the web are researched and analyzed. In the case of intermittent web transportation, iterative learning control (ILC) is adopted to eliminate the periodic disturbance. Simulations show that the iterative learning control method adopted is very effective to resist the lateral displacement of the web by using the offset-pivot guide system.
A Novel Integration of GNSS and GIS Approach to Foundation Roller Compaction in Civil Engineering
Authors: Weng Chen Cheng , Wu Hao , Liu Xiao Dong , Du Zhao Yu , Shi Lei , Feng Yun Qiang , Yang Jian , Yuan Ling Yun
Published: February 2012

From the quality of foundation roller compaction perspective in large civil engineering, this paper integrated the high precision real-time position technology of GNSS and the spatial analysis function of GIS, constructed a foundation roller compaction quality monitoring system to realize the real-time monitoring of foundation roller compacted construction process, which can ensure the quality of this process . At the same time, based on expounding the rolling system structure and working principle, it is detailed introduce the system module and the key algorithms.
Large Eddy Simulation of Hydraulic Characteristics of Flow around Two Parallel Circular Cylinders
Authors: Zhao X.J. , Wei W.L. , Wang Xi , Liu Ming Qin
Published: February 2012

large eddy simulation cooperated with a physical fractional-step method was applied to simulate steady flow around two parallel circular cylinders. The total velocity vectors, pressure contours and vorticity magnitude are obtained. The modeling results conform to physical law, and show that the large eddy simulation theory has powerful capacity in simulation of microstructures of turbulent flows, and can be widely applied to the solution of real engineering problems.
Independent Innovation Network Teaching Platform Research
Authors: Lu Bing , Qian Ying Xia , Liu Jia Jun
Published: February 2012

[Objective] To achieve self-learning ability and to develop innovative strategies for effective application, network learning platform is designed. The changes of learning platform in innovation learning elements and function modules are to further explore. [Methods and Process] Experimental research methods combined with functional testing; system analysis and theoretical studies are combination of research methods. [Results] The innovation of e-learning platform designed is to adhere to the principles of humanity, to strengthen the interaction between teachers and students, to make up for the shortcomings of traditional teaching, to achieve a system of teaching and the integration of resources and management, to provide learners with a kinds of effective learning platform and how to effectively optimize student learning strategies, to achieve self-learning, collaborative learning and the combination of innovative learning purposes. [Conclusion] The innovation of e-learning platform design is based on self-learning ability to develop innovative strategies to make the practice of research and exploration, curriculum design for the network providing a useful example of network courseware and teaching platform with dual function, to ensure teaching goals, and to promote the coordinated development of the overall quality of students.
Limit Deformation Analysis of Rectangular Stiffened Plate to Near-Filed Explosions
Authors: He Jian , Xue Gui Sheng , Gao Yuan
Published: February 2012

Stiffened plate is used widely in ship structure for its high capacity and light weight so studying the limit of deformation of stiffened plates under blast loading has important engineering significance. The blast loading is simplified to triangle with only ascending stage and equivalent stiffness at all directions and every parameter of the stiffened plate are calculated so the maximum deformation can be solved finally. The dynamic response of rectangle stiffened plate under blast loading was simulated by non-linear finite element software and got the maximum deformation of the plate .The simulative results are consistent with the theoretical results. At the same time, the displacement and velocity of all directions at three different points can be got from the simulation and related theoretical derivation is proved correctly by analyzing the simulative results.
Mechanical Properties of Aged Cord-Rubber Composites
Authors: Xie Zhi Min , Wang Lu , Wang You Shan , Chai Dong Liang
Published: February 2012

Cord-rubber composites are usually subjected to cyclic deformation for the tire applications. Due to the hysteretic nature of the rubber, heat generation in the rubber component under dynamic cyclic loading often causes a rise in temperature, which can deteriorate the physical properties of the composites. Therefore, better understanding of the cord-rubber composites under thermal aging conditions is of great importance for the lifetime prediction. In the present work, the effective modulus of polyester cord- and steel cord-rubber composites at different aging conditions was studied by means of the mechanics of composite materials and the Arrhenius relationship based on the properties of components. It is found that the Halpin-Tsai relation with introducing the effect of thermal aging is also valid for the aged cord-rubber composites.
Logistic Performance Evaluation of Squeeze Casting Equipments Based on Simulation
Authors: Deng Jian Xin
Published: February 2012

The logistic performance of a squeeze casting equipment like production cycle time and the utilization rate of components, has impacts on the production rhythm , cast quality and it's lifecycle. So it is essential to analyze the logistic performance of squeeze casting equipments during design, buying and using. This paper deals with evaluating the logistic performance of squeeze casting equipments through simulation.Flexsim software was employed to simulate squeeze casting equipments, where the simulation model of a squeeze casting machine was constructed and the utilization rate was investigated by conducting four simulation samples of different cast products.It is indicated that simulation is an easy and effective method to evaluate the utilization rate performance of squeeze casting equipments and it is concluded that the utilization rate of all component cells except squeeze mechanism is very low and decreases with the curing time of casts increase, their value is very close to the ratio of the their processing time to each total cycle time. The simulation results can also help us find the bottleneck and optimize design of the squeeze casting equipment.
Analysis on Affection and Dissemination of Road Traffic Accidents
Authors: Zhang Han Xin
Published: February 2012

Analysis for the road traffic accident is the dissemination of summary analysis of road traffic accidents, all types of traffic into the causes and recommends a system can reduce the effective theory of road traffic accidents. Road traffic system is a person, motor vehicles, the combined effect of the environment from the system. Road traffic safety depends on people, vehicles, roads, environment and road traffic management in all aspects of an integrated system for co-ordination. Characteristics for the occurrence of traffic accidents, road traffic accident on an analysis and research of the impact-spread of road traffic accident, to investigate the microscopic properties of a traffic accident on the traffic flow, emissions, noise impact and the dissemination of the law, analyzing the past, the scene of the accident the speed of other vehicles and drivers of the physical distribution psychological reaction to speed up the disposal of road traffic accidents, to reduce road traffic accidents on traffic flow and avoid the second derivative disasters, the elimination of road accident black spots, build a smart urban road traffic command system, to reduce pollutants in automobile exhaust emissions to protect the natural ecological environment, thus contributing to building a harmonious ecological city transport network.
Heat Dissipation Design of High Power LED Headlamp
Authors: Gao Tie Cheng , Yao Su Ying , Ai Yan Jin
Published: February 2012

High brightness white light emitting diodes(LEDs) are very promising in many new illumination applications. This paper is to investigate the cooling solutions of a LED heallamp. Air cooling with heat sink were proved to be unsuitable. A cooling method based on heat pipe is adopted which is proved to be effective. Simulations were performed with Flotherm software to investigate the thermal permance.A sample of LED headlamp is fabricated based on the structure of a certain sedan combined headlamp. The testing results are in accordance with the simulation results
Impurity Detection Using Machine Vision
Authors: Huang Bin , Li Jian Feng , Wang Jin Chen , He Yin Zhou , Shang Wei
Published: February 2012

In the fields of transparent liquid impurity detection based on machine vision technology, how to detect and identify a variety of impurities effectively in the liquid is a difficult problem which has not yet been solved, mainly in the low recognition rate, the slow recognition speed, and the phenomenon of error detection and undetected. Therefore, a new impurity detection method based on machine vision is presented in this paper. The experiments show that this method can decrease the recognition speed to 100ms for impurities’ diameter greater than 1mm and achieved a 99% recognition rate.
Network Environment and Innovative Learning Research
Authors: Lu Bing , Qian Ying Xia , Liu Jia Jun
Published: February 2012

[Objective] study the self-innovative learning theory origin and new connotation under the network environment, research on how network environment provides technical support for independent innovation learning. [Process and methods] Adopting the combining of empirical analysis with normative analysis, system analysis with statistical analysis and actual investigation with literature research examine from hardware, resources and culture, technology and other means. [Results] No matter Bruner's cognition discovery theory, Su Baer's cognition assimilation theory or Rodgers's Humanism learning theory on learning view , has attached great importance to significance of learning autonomy in learning activities with the basic thought of learning the essential understanding and learning strategy; independent innovation learning expectations and the participation of the two basic characteristics; network environment provides a good technical support for the self innovative learning either from the cyber source volume, or interactive way, resource configuration and its retrieval and search reliability provided by the network technology. [Conclusion] The applications of Internet, multimedia technology, provide a very broad choice and reliable technical support for learners in the new environment to achieve a variety of means, way, time, space and virtual or real situation and to interact with information transmission web based learning exchanges, so that the innovative learning activities can be richer and more effective under the network environment.
Position Sensorless Control System of SRM Based on Improved BP Neural Network
Authors: Xiao Li , Sun He Xu , Gao Feng
Published: February 2012

Due to the shortcomings of long training time and slow convergence of BP neural network, this paper presents a new improved method that weight is no longer a constant but turned into a function of adjustable parameters. After the training of the improved BP neural network is completed, the network can map the nonlinear relationship between motor current, flux and rotor position. Based on the analysis of the unique structural properties of switched reluctance motor, this paper also proposes a method of greatly reducing the sample data to save computing time. Simulation results show that this method simplifies the complexity of the control system and improve detection accuracy, thus realize position sensorless detection of the switched reluctance motor.
Numerical Simulation of Mixing Performance of Intermeshing Co-Rotating Tri-Screw and Twin-Screw Extruders
Authors: Wang G. , Zhu X.Z. , Sun Chun Yi
Published: February 2012

Parallel arranged tri-screw extruder (PATSE) is a new machine of polymer processing and first manufactured in recent years in China. Compared with the traditional twin-screw extruder, PATSE adds a screw, and added an intermeshing region. It is well known that material going though intermeshing region will acquire higher shear rate and stretching rate, which is beneficial to mixing processing. In order to know the mixing performance in cross-section for PATSE, polymer melt flow field simulation and mixing simulation were conducted on PATSE with 2D model and a Carreau flow model to evaluate velocity profiles, particle trajectories, max shear rate, max stretching rate, dispersive mixing, distributive mixing, segregation scale, length of stretch, mixing efficiency with the commercial CFD package Polyflow and compared with those of twin screw extruder (TSE). The results show that PATSE has better mixing performance than TSE.
Research on Plasticity Shaped Technology of Gear for New Type Agricultural Vehicles
Authors: Yu Jin Wei
Published: February 2012

With the development of modern agriculture, agricultural vehicles have broad prospects for development, for existing problems of the agricultural vehicles spur gear original forging die , designed new precision forging new technology of gear and new type precision forging die to use for production , in order to enhance radial intensity of concave model and reduce the cost of updating die, using fluctuating concave model level bisection ，three-player pre-stressed composite concave model structure ，lock-oriented , top concave model and model core are floating . Forgings parts formed in a closed ring mold cavity ，forging parts without fly side , significantly reduce turning remaining of semi-finished product,the material utilization, production efficiency and quality of forgings significantly improved , gained good economy benefit.
Network Publishing on Editorial Activities
Authors: Liu Shou Yi , Wei Dong Ling , Liu Jia Jun
Published: February 2012

[Purpose] To explore the network publishing formed by the combination of the network and the traditional publishing industry, the rapid development of new media and its effect on the editorial activities. [Process and method] Adopting the combining of empirical analysis with normative analysis, system analysis with statistical analysis, and actual investigation with literature research.[Results] To demonstrate the concept and connotation of network publishing, to discuss rich and colorful, blending, invariance properties of editing activities under the environment of network publishing, from the collection of information, research, planning, organizing, peer review, editing, proofreading to graphic design and other aspects, which has effect of the network publishing on editorial activities. [Conclusions] Network and multimedia technology promotes the development of editing industry, has profound effect on editing activities and challenges the editing staff.
Numerical Simulation of High Speed Machining of Alloy Cast Iron
Authors: Tan Yang , Chi Yi Lin , Huang Ya Yu , Yao Ting Qiang
Published: February 2012

High speed milling of hard alloy steels utilized in dies and molds is a highly demanding operation. The finite element model was developed to investigate the high speed machining of alloy cast iron which is used in auto panel dies. The modified Johnson-cook constitutive model was used to model the complex dynamic material behavior, a damage evaluation law based on Cockroft and Latham model was used to simulate the ductile fracture of alloy cast iron. The crack initiation and propagation was simulated explicitly using an explicit FEM code. Simulation results showed that the chip morphology transited from continuous to saw-tooth chip with increasing cutting speed, cutting force decreased when increasing the cutting speed, which provide a useful understanding of chip formation process in high speed machining of alloy cast iron.
Numerical Simulation on Aerodynamically Generated Injection Nozzle Noise
Authors: Yu Jian Ping , Zhu Hong , Chen Shu Ping , Zhang Xiao Sen
Published: February 2012

In contrast to computational aerodynamics, which has advanced to a fairly mature state, computational aeroacoustics (CAA) has only recently emerged as a separate area of study. The fluid field when air flowing through the nozzle is calculated based on the standard RNG turbulent equations. The mass flow rate is tested based on the experiment. Comparing the calculated and tested mass flow rate, there is only 0.6% error. Hence the results based on the CFD method are reliable and can be used to industrial applications. The Lighthill’s acoustic analogy method is adopted and the noise when air poured into opens space is simulated. The noise is also tested by the experiments. The result indicate that the simulated data have the same tends as experiment data. Although there are some differences between the simulated and tested data, the simulated data shows that the numerical method can be qualitatively predicting the industrial noise.
Weed Image Edge Detection Based on Order Morphology Transformation
Authors: Xu Yan Lei , Xu Yue , Zhang Qing He
Published: February 2012

Weed recognition is one of the key parts of variable rate spray system, and is the important part of precision agriculture. This paper applied the order morphology to weed recognition, and constructs the edge detection operations that fit to weed image. The corresponding simulation is also done, the result show that the operation that this paper proposed is very suit for weed edge detection.
Optimization of Cooling Parameters in Casting Processes Based on Adaptive Evolutionary Particle Swarm Algorithm
Authors: Ji Zhen Ping , Jiang Yuan Yuan
Published: February 2012

The aim of this work was to develop an optimization tool consisting of a two dimensional heat transfer model and an optimization algorithm to determine the improved cooling conditions for the sprays zones of a real continuous caster. The mathematical model of cooling process was used to calculate the strand temperatures along the machine. An optimization algorithm based on an Adaptive Evolutionary Particle Swarm Optimization (AEPSO) approach was used to solve an optimal control of secondary cooling water distribution according to certain metallurgical criteria and some technological constraints, which enhance the global exploratory capability and avoid pre-mature convergence. The simulation results show that it can improve the repeatability and quality of solution.
The Supportive Role of Information Technology on the Subject Teaching
Authors: Wang Yu Hong , Zhang Li Hua , Liu Jia Jun
Published: February 2012

[Purposes] It aims to discover and research on the pedagogical characteristics of Modern information technology environment, its influencing aspects and the supportive role of the modern Information technology on the subject teaching. [Methods and Procedures] It is via the method of systematic analysis and theoretical research, functional development and experimental comparison as well, with a procedure of subject teaching integrating to the environments of hardware, software, resource, web-based of Information technology to establish all these inventive researches. [Results] The disciplines of information technology into the classrooms, its effectiveness will be interfered from a series of factors, such as teachers, students and the environment. It exposes the multidimensional characteristics of its richness, alternative mode, environmental openness and interactive model as well. So, to build an authentic supportive multimedia learning environment with a variety of features for the network learning environment to the creation of conditions for learning and teaching will provide good support for learners, to improve student learning motivation, thereby, promote their self-concepts and mastery of basic skills, establish a more student-centered learning process, higher input and more active processing activity ,consequently, result in higher levels of thinking and promote better recall capability. [Conclusions] Information technology can provide a wide range of disciplines to support learning, via it, the conduction to learning is a learner’s dominance reflection, which allows learners to have a greater self-acquisition and exploration of space for their individualizations and open learning styles.