bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of SPSS in Theoretical Mechanics Education
Authors: Sun Hai Bin , Liu Ting Ting
Published: October 2011

Theoretical mechanics education played an important role in developing undergraduates’ knowledge and ability. Test is a main method to measure undergraduates’ theoretical mechanics learning outcomes. Test analysis mainly consists of score analysis and test quality. When judging the quality of a test, item difficulty, item discrimination, reliability and validity should be calculated and analyzed. The test paper of theoretical mechanics was analyzed by SPSS for Windows. The statistic results demonstrated that students have good learning outcomes and the test paper has good quality.
Design for Turntable of Spray Rack
Authors: Zhang Wei Hao , Li Ke Tian
Published: October 2011

A turntable device that can work in spray rack is introduced in this paper. The device can drive the workpieces hanging in the turntable revolute and rotate. The 3d software has been used to design the modeling, and calculated the gear parameters according the requirements of turning, such as allowable stress. Finally the device can meet the technological requirements, automatic and stress. It also got a satisfying result at the application in practical production.
The Application of Bond Graph Theory on Automobiles Modeling
Authors: Tang Chuan Yin , Hou Xin Yu , Yin Hua , Zhang Ying
Published: October 2011

Based on the bond graph theory, the acquisition of state equation of vehicle suspension is presented. Set an example to a five degrees of freedom vehicle suspension model ,the simulated results are obtained with the aid of Matlab/Simulink software. Bond graphs are equation based , and are superior to traditional differential equations, they can provide the dynamic digital simulation in time and frequency domain, they can present the static simulation and omit the transition and class-decreasing process which is needed for traditional differential equations.
Optimization Design of Vehicle Front Suspension Structure Parameters Using DOE Method
Authors: Feng Jin Zhi , Song Jiang Tao , Zhu Wei Hua
Published: October 2011

Based on Multi-body system Dynamic theory, front suspension model is established by using ADAMS/Car, and then the validation is finished according to suspension K&C test project. Through the model simulation, the sensitivity of structure parameters to suspension kinematics characteristics has been analyzed and then the most sensnetive ones have been sorted out. The suspension structure geometry parameters are optimized by the application of DOE method based on virtual prototype technology. The parallel travel simulation results are as follows: the values of camber angle, toe angle, kingpin inclination angle, steer angle and lift/dive are reduced, and the values of caster angle are increased slightly with the optimized suspension. Consequently, the optimized suspension is more conducive to vehicle handling stability compared with the original one. This optimization design method provides the technical support for suspension positive development.
Strength Analysis of a Naval Gun Bracket in Marine Combat Conditions
Authors: Hua Bin Bin , Ma Ji Sheng , Wu Da Lin
Published: October 2011

In order to check the strength of a naval gun bracket, the model was established in CAD software firstly, and then exported into finite element software to establish the FEM model of the bracket. Loading inertia force simulated gun swing situation in the ocean, then the simulation process was calculated loading dynamic force. The stress curves of dangerous positions in bracket have been got and analyzed, indicating that the gun bracket design is reasonable. This research has some significance for designing and improving gun bracket, and it provides a reference to the factory strength test.
Passive Stereoscopic Display and Disassembly Simulation of Certain Shafting Components
Authors: Tu Qun Zhang , Qin Long , Dai Jv Ying
Published: October 2011

The principle of stereoscopic display technology，the software and hardware framework for single-channel passive stereoscopic display and the simulation software Delmia are introduced in this paper. Certain shafting components serve as an example to realize the effect of passive stereoscopic display and disassembly simulation in Delmia, which is helpful for teaching and training about equipments maintenance
Causes Analysis and Counter Measures to Bad Riveting of the Top Cylinder Head of the Compressor
Authors: Xia Yan Chun , Cao Bao
Published: October 2011

In the trial-produce process of the CSA804 compressor, it was found that the appearance was not very good after riveting the top cylinder head. Most have the flanging phenomenon and the leakage detecting FPY cannot reach the mass production requirements. For this problem, through analyzing the related sizes of the top cylinder head, understanding the principle of the riveter, and considering the viveted method, the reasons of the bad reveting of the top cylinder head can be analyzed. Accordingly, the corresponding improvement measures can be taken to make the leakage detecting disqualification be lowed to the normal levels.
Microstructure and Properties of Mo-Based Composites Reinforced by Al2O3
Authors: Wei Shi Zhong , Xu Liu Jie , Zhang Guo Shang , Li Ji Wen , Dai Bao Zhu
Published: October 2011

Mo-based composites with Al2O3 particles were developed in order to enhance the wear resistance of molybdenum alloys. Using Al2O3 power and pure Mo power as raw materials, the Molybdenum powders mixed with Al2O3 particles were prepared using planetary ball mill. And then the Mo-based composites with 3-10vol.% Alumina were prepared by compaction and sintering at 1840°C. The morphology of the Molybdenum powder and microstructure of the composites were analyzed by SEM and XRD. The micro-hardness, density and wear property of composites were researched. The results show that the microstructure of composites is composed of α-Al2O3 particles and Molybdenum matrix. With the increase of Alumina content, the microhardness of Molybdenum matrix increases, and the density first increases and then decreases. The friction coefficient of composite is scarcely affected by the alumina content. While the wear resistance of the composites rises with the increase of Alumina content. The wear failure is caused by abrasive wear characterized by obvious plow furrow and abrasive dust on the worn surface.
The Research of 6-DOF Robot Reachable Workspace
Authors: Gou Zhi Jian , Yu Hai Ying , Niu Yong Kang , Xie Yan Chao
Published: October 2011

With the continuous development of industrial robot application, it becomes very important for the solution of reachable space in the designing and applicating process. But the traditional theory calculation method is complex. When solving the reachable space of new kind of robot, we only draw lessons from the theory and need to change more. So a simple and convenient method is needed in theory field. This paper proposes a method that combine Matlab with SimDesigner to solve 6-DOF Robot reachable space, and takes ABB-1400 as an example to explain the solution of 6-DOF Robot reachable space. It could attain the full reachable space by add sine motion function reasonably to every joint, and obtain the solution of robot reachable space speedly.
Relationship between Modal/Cotton Blending Ratio and Heat-Moisture Performance
Authors: Cong Shan , Ke Bao Zhu
Published: October 2011

7 sorts of modal/cotton blended yarns were prepared with different blending ratio. This article studies the relationship between the wear comfort performance and blending ratio. By the analysis of the moisture adsorption, moisture-air permeability properties, the optimum blended ratio of the modal/cotton blended fabric is determined. The results indicated that the excellent wearing comfort of modal/cotton could be adjusted by changing the compositions. The results indicated that the properties of the modal/cotton fabric could be adjusted by changing the compositions, which can be seen the development of good underwear fabric fiber raw materials.
Research on an Embedded Servo Control System of Micro-EDM
Authors: Yang Guo Zhe , Liu Feng , Lin Hai Bo
Published: October 2011

Designing a high quality and low cost servo control system of micro-EDM is the key technique of high precision micro-EDM. The paper solves this problem by designing an embedded servo control system of micro-EDM. The servo system realized the FOC of PMSM by using embedded technique, which connect the servo controller and the pulse generator properly. The scheme of servo control system has the merits that it is low cost, flexible and self adjustment of discharging gap.
Study on the Impact of the Cutting Process of Wire Saw on SiC Wafers
Authors: Wang Xiao Ye , Li Yan , Li Shu Juan
Published: October 2011

Based on reciprocating electroplated diamond wire saw cutting SiC wafers experiments, the influences law of wire saw diameter, wire saw quality, wire saw speed, wire saw wear and cutting fluid on cutting rate and wafers surface quality was studied. The results indicate that cutting rate increase with wire saw diameter and wire saw speed increase, and decreases with wire saw wear; wafers surface roughness increase with wire saw diameter increase and wire saw wear and a slightly lower with wire saw speed increase; TTV (total thickness variation) is risen slightly with wire saw diameter increase; wire saw wear and insufficient cutting fluid supply are the main factors to cause cutting time increase and wafers quality decline. And the experimental results were analyzed.
Optimization Design for Petroleum High Pressure Wellhead Gate Valve Stem Based on MATLAB
Authors: Zhou Si Zhu , Li Chao
Published: October 2011

The optimization for petroleum high pressure wellhead gate valve stem is significant. Valve stem load calculation method is developed, and petroleum high pressure wellhead gate valve stem optimization model based on MATLAB is established, taking 2 9/16 inch 35MPa wellhead gate valve for an example, the stem weight decreases by 27%, consequently decreasing valve weight.
Optimum Design of Laser Encoding and Decoding on Laser Beam-Riding Guidance
Authors: Qian Yi Xian , Hu Fang Rong , Cheng Xiao Wei , Yang Li Bao
Published: October 2011

Operating principle of laser beam-riding guidance was set forth. Based on the principle of spatial frequency-encoding, an optimum laser encoding mode was designed, which can transfer continuous laser into pulse laser that represents different position information. Then the mathematic model of deviation from target is built, a modified encoding pattern was presented, which is composed of two light paths crossed 90. Azimuth information of target is given in orthogonal coordinate system and deviation from target is linearity. As well as, characteristic distribution of spatial laser field is analyzed. Corresponding decoding mode was presented, by testing in 2 kilometers outdoor; experimental results demonstrated that the receiver can receive correctly the encoded signal and can decode the signal, measurement for the missdistance is feasible and all the performance parameters satisfy the demand.
Panoramic Vision Mine Safety Monitoring System Based on WLAN
Authors: Feng Ling Ying , Tu Ran , Gao Xin , Yan Feng Jie , Tang Yi Ping
Published: October 2011

For the requirements of complex environment and safe-management in the coal mine, this paper presents a new Panoramic Vision Mine Safety Monitoring System Based on WLAN. the monitoring system use a binocular omni-directional vision sensor(ODVS)[1] coordinated with the WLAN or LAN network to transmit images, information, commands or data. The system can also get the panoramic vision in the coal mine from any miner at any time. The miners’ identities will be binding with the ODVS and WLAN protocol. Then the monitoring system will use the binding information to position and track miners. This is a new reliable monitoring system which can monitor the coal mine environment security, the coal mine producing security, the coal mine transport security, the miner security at the same time, and these provide the system with expecting application value and market outlook.
Research on the Method of the Calibration of 3D Linear Scanning Probe System
Authors: Wan Peng , Guo Jun Jie , Wu Pei Lin , Fei Zhi Gen
Published: October 2011

3D scanning probe is a kind of measuring instrument that is an indispensable part of Gear Measuring Center. It’s used for obtaining micro-displacement in three directions through the deformation of the three mutually vertical parallel springs. The accuracy of the probe system has critical influence on Gear Measuring Center. Because of the limitation of the structure of parallel spring, the installation errors of the probe and the influence of environmental factors, the parallel springs in three directions are not always strictly vertical, the interference and coupling among X,Y,Z directions exist. This problem is very difficult to be solved by adjusting the mechanical structure of 3D scanning probe system. However, the accuracy of probe system can be improved by adopting software-compensation through calibration. In the paper, the calibration matrix of the probe system is generated by fitting the points sampled on the standard ball with the method of the least square. The points are sampled through controlling the probe to touch standard ball in several given directions. The experimental results show that the measurement errors caused by the coupling among the three perpendicular directions can be effectively decreased by the coefficient matrix mentioned above. The method of calibration is practical and effective for improving the measurement accuracy of 3D scanning probe.
The Angle Inspection and Control System Based on PLC and Photoelectric Encoder
Authors: Shi Xian Jiang , Sun Han , Si Wen , Han Jin Zhi
Published: October 2011

Aiming at questions of accurate detection of experimental installation’s angle is difficulty like rotating platform, which designs the angle inspection control system adopting incremental photoelectric encoder and PLC. Using gear mechanism and magnified angle pulse of electrical fourfold frequency circuit, switching in biphasic high-speed interfaces of PLC and being displayed on panel calculated by PLC, or achieving to correct the output pulse of motor driving with setting angle value. With experiments testing, the system of inspection and control has advantages of simple construction and angle inspected accuracy of 0.0225°, which satisfying the demands of angle accurate inspection and control of experimental installation.
Effective Thermal Expansion Coefficient of Eutectic Composite Ceramic Containing Lamellae
Authors: Liu Xie Quan , Fu Yun Wei , Sun Tao , Li Bao Feng
Published: October 2011

According to the microstructures in eutectic composite ceramic containing lamellae, the four phase model, which is composed of lamellae, eutectic interphase, matrix-atmosphere and effective medium, is put forward. Three phase cell that is composed of lamellae, eutectic interphase and matrix-atmosphere can be regarded as a composite inclusion. In view of Eshelby theory, the effective thermal expansion coefficients of eutectic composite ceramic containing the same orientation lamellae are determined. The eutectic composite ceramic is transverse isotropy and has two independent thermal expansion coefficients. The quantitative analysis shows that the effective thermal expansion coefficients have obvious size dependence.
Top-Layer Design and Systematic Design of Products
Authors: Wen Bang Chun , Li Xiao Peng , Song Gui Qiu , Wang Zong Yan
Published: October 2011

The A new design method of the products named “Systematize Design” has been advanced in this paper. From the view of the point of the system engineering, the planning of product design makes the product design qualities improve to a great extent. Besides the understanding of the client requirements, the design planning of products, the so-called 7D’s: Design ideas, Design environments, Design objective, Design process, Design contents, Design methods and the Design quality evaluation, should be considered completely and planned systematically. Based on the previous work, the product design should be conducted according to the systematic design method. The paper makes a detailed expatiation of the systematic design method, viz. 1+3+X design method, in which 1 represents the optimal design for product functions, 3 means the design method synthesizing the dynamic optimization, intelligent optimization and visualized optimization combined organically, and X is the design method for the special requirements of the products.
Hydraulic Analysis and Optimization in Impeller of Magnetically Levitated Centrifugal Blood Pump
Authors: Zhang Hui Min , Zhu Qi
Published: October 2011

This article, on the basis of the magnetically levitated pumps developed by Ibaraki University, talks about fluid dynamic analysis of pump and optimization of parameters of the impellers. The pump uses blood as medium, with a flow rate Q of 5L/min, a pressure head H of 100mmHg. By using software of ANSYS CFX, the article analyzes the effect of shape, angle, height, length and thickness of the impeller on performance chart and fluid field distribution inside the pump. To fulfill the human requirements in blood pump, an optimization analysis is conducted to improve the uniformity of fluid field, reduce power and efficiency of the pump. As result, meeting the flow and pressure head condition, single curvature impeller is found to have lower speed, better efficiency and more uniform flow field, this helps to prevent the generation of thrombus and hemolytic.
Research of Reliability on the Switch Phase-Sensitive Circuit of the Equipment
Authors: Jiang Wei , Liu Yun , Xu Peng Fei , Li Ning , Zhao Si Yuan
Published: October 2011

The transformer is the hard core of the switch phase-sensitive circuit of the equipment. According to the basic failure rate model and working failure rate model of the national standards, the transformer working reliabilities are analyzed under different working conditions and environments. Based on this, the reliability analyses of the redundancy structures of the switch phase-sensitive circuit are done, and the comparisons and analysis of the results are done, and the useful conclusions for design and engineering are presented.
Finite Element Analysis on Seal Quality of the Tank Engine’s Common Rail System
Authors: Yang Hao , Wang Xi Bin , Zhou Wen Hao , Ding Yue , Fang Ze Ping
Published: October 2011

As the oil pressure of tank engine’s common-rail system is as high as 180MPa, it could bring a grate challenge to the oil con-rail’s seal quality. Especially in the condition of high oil pressure system, pulse load, metal creep deformation as well as machining error could low the reliability of con-rail’s. In tradition, shrinking the part’s tolerance is the main measure to ensure seal reliability .The measure eventually cause low efficiency, unnecessary waste, and high product cost in mechanical process. In this analysis, ABAQUS is exploited to discuss the influence that caused by various machining error on seal quality .Finally , the least taper angle error (critical point) lead to leakage is found. Besides the efficiency would be improved, the process cost also could be cut down a lot by using this data to constitute optimal technical files.
Study on the Dynamics Performance of the Drive Train of Flying Shear Machine
Authors: Wang Yong Qin , Li Li , Luo Yuan Xin , Yan Xing Chun
Published: October 2011

Flying shear machine is widely used in continuous rolling mill production line, and its performance is largely depended on the transmission system. Here a model is established with multiple backlashes, time-varying mesh stiffness and error excitation to investigate the dynamics performance of the transmission system during the process. Also, effects of parameters are discussed. It’s believed that it will be helpful for the design of the flying shear machine
Experimental Investigation on the Scribing of Sapphire Using UV Laser
Authors: Wang Mao Lu , Wang Yang , Qin Lei , Guan Jian
Published: October 2011

Sapphire is an important wide bandgap semiconductor material for developing UV/blue optoelectronic devices, however because of its high hardness and chemical stability; it is mechanically and chemically difficult machine. In this paper, the scribing of sapphire by UV laser pulses is investigated under various conditions of pulse energies, scanning speed and repetition rate. The quality and morphology of the laser ablation of sapphire surface are evaluated by scanning electron microscopy. The mechanism of UV laser ablation of sapphire is discussed. The formation of grooves with high aspect ratio and good surface quality is achieved by selecting appropriate laser parameters. Scribing by pulsed UV laser therefore provide a new approach in the development of sapphire-based devices.
Wavelet-Based ARMA Model Application in Power Network
Authors: Wei Wei , Ma Hao
Published: October 2011

The theoretical properties of the ARMA model and the modeling process, then, the Shanghai power network and Shenzhen power network in China were established ARMA model and wavelet-based ARMA model fitting, prediction, and finally, to fit forecast The results were compared. It can be seen, combined with relatively good forecasting effect after wavelet.
Hopf Bifurcation and Stability Analysis on the Mill Drive System
Authors: Gao Zhi Ying , Zang Yong , Han Tian
Published: October 2011

According to the lumped mass method, the drive system of rolling mill can be simplified as a three-degree-of-freedom spring-mass model. The nonlinear dynamics equations are established considering nonlinear torsion stiffness of connecting shaft and nonlinear friction force between roller and strip, and Hopf bifurcation and critical parameters are analyzed by applying the Hurwitz algorithm criterion. Furthermore, the system stability is numerically simulated through time-history and phase plots. The results indicate that the system motion can be stable in some range of parameters, and the bifurcation phenomenon occurs and the stability may be lost across the critical points. In addition, at different bifurcation points the phase orbit run along diverse skeleton curves of revolution. These conclusions are significant to reveal the mechanism of system bifurcation and stability, and help for optimization of technology condition in practical application.
On-Line Inspection of Adhesive Bond Discrepancies with Dynamic Electrode Displacement Method
Authors: Zhao Xin , Wang P.C , Zhang Yan Song , Chen Guan Long , Lai Xin Min
Published: October 2011

Adhesive bonding technology has become one effective joining technology instead of the traditional spot-welding especially for AHSS materials. But Adhesive bond quality inspection method is limited to the mechanical performance tests such as tensile-shear test recently and it’s time-consuming and unpractical. So a reliable and practical method for on-line identifying different bond discrepancies and assessing the bond quality is necessary in industry. Based on the thermal expansion electrode displacement mechanism during weld-bonding process, the dynamic electrode displacement method could be applied for differentiating adhesive bond discrepancies effectively through acquiring and analyzing the dynamic electrode displacement signal curves during weld-bonding process from laser displacement sensors installed onto the welding gun. Lots of experiments and analysis showed that this method is basically feasible, that is, it could identify different adhesive bond discrepancies qualitatively and accurately. So it has a good potential especially applied in production line.
A New Criterion for Attribute Reduction Based on Variable Precision Rough Set Model
Authors: Tan Hai Zhong
Published: October 2011

The rule set which is acquired based on rough set theory can be classified into two categories: deterministic rules and probabilistic rules. Traditional attribute reduction definitions in variable precision rough set model cannot guarantee the rule properties, namely deterministic or probabilistic. In this paper, a new criterion for attribute reduction is put forward based on variable precision rough set model. The rule properties can be preserved during the process of attribute reduction. The relationships between the new reduct definition and available definitions, including Ziarko’s reduct definition and β lower distribution reduct definition are also discussed.
Singularity Analysis of a Plane-Symmetry 3-RPS Parallel Robot Based on Translational/Rotational Jacobian Matrices
Authors: Shi Yan , Yue Hong Xin , Lu Yi , Guo Lian He
Published: October 2011

Firstly, 3-DOF parallel robots were classified into different types from the view of moving form. A new method of analyzing the singularity of 3-DOF parallel robots was introduced, which is based on translational Jacobian matrix and rotational Jacobian matrix. The singularity of parallel robots with pure translational form and pure rotational form was introduced summarily. Secondly, the process of solving the plane-symmetry 3-RPS parallel robot with combined moving forms was focused on, through which translational Jacobian matrix and rotational Jacobian matrix were adopted. Finally, the solving results were compared with the axis-symmetry 3-RPS parallel robot, which showed more general singularity can be solved through the new method.
Performance Analysis and Optimization of Flange Bolt Joint under the Influence of Inhomogeneous Temperature Field
Authors: Wang Qing , Zhou Xian Jun , Liu Zhi Liang , Bi Hong Jie
Published: October 2011

A three-dimensional mechanical model and a transcalent model of flange bolt joint were built, considering the nonlinearity of gasket and the contact problem, the effect of inhomogeneous temperature field and its variation to pressure of bolt and gasket was studied, and the joint parameters of two schemes were compared; based on the orthogonal text, two bolt system schemes, adding disc spring and adding sleeve, were experimentally studied. The investigation showed that the sealability of different parts of the gaskets is different, owing to the difference of each bolt in radial and axial displacement under the influence of inhomogeneous temperature field, and the fatigue of gasket and bolt is easily caused; the scheme of disc spring is better than sleeve, and the disc spring, whose thickness is 0.9mm, was selected to improve the mechanical performance of bolt system.
Analysis of the Variable Electromagnetic Damping Using in the Second-Order Oscillating System
Authors: Li Tao , Li Wei Feng , Bai Jing Yi
Published: October 2011

This paper analyzes the working principle of the electromagnetic damper and proves the characteristic of linear damping. Basing on the characteristic, a method of controlling the magnetic damping is proposed that the oscillating time can be reduced by using the sectional damping coefficients in second-order oscillating system. Using Matlab, the results of decreasing time are compared under the sectional damping consisting of two-segment or more segment with various coefficients.
Nonlinear Analysis of Porous Squeeze Film Damper-Mounted a Rotor with Non-Linear Suspension and Roughness Effect
Authors: Changjian Cai Wan , Hsu Hsiang Chen , Chen Jiann Lin , Wu Guan I
Published: October 2011

This work studies a numerical research undertaken to investigate the dynamic behaviors of porous squeeze film damper mounted a rotor considering longitudinal and transverse roughness effect under nonlinear suspension. The dynamic response of the rotor center and bearing center are studied. The analysis methods employed in this study are inclusive of the dynamic trajectories of the rotor center and bearing center, Poincaré maps and bifurcation diagrams. The maximum Lyapunov exponent analysis is also used to identify the onset of chaotic motion. The modeling results provide some useful insights into the design and development of rotor-bearing system for rotating machinery that operate in highly rotational speed and highly nonlinear regimes.
ARMA Model and Wavelet-Based ARMA Model Application
Authors: Wei Wei , Ma Hao
Published: October 2011

This article discusses some of the linear regression model from the modeling theory, focusing on the modeling method of selecting the optimal model, choose the best bandwidth criteria. Then, given some of the partial linear regression model from the estimates and the partial residual nuclear smooth estimates, and estimate the model using the partial residual in the unknown parameters and to estimate the unknown function. Finally, the establishment of the Shanghai Index and Shenzhen Component Index Partially linear regression model.
A Computer Aided Conceptual Evaluation of Excavator Cab Based on Ergonomics
Authors: Li Fang Yu , Li Ye Fei
Published: October 2011

In this study a methodology of computer aided conceptual design in product development based on ergonomics was put forward. When products concerned with people are designed, ergonomics should be taken into account. The digital human model was used to decide the layout of design scheme. Ergonomics features were extracted in workplace analysis. With the aid of software Pro/Engineer, the whole human and machine virtual environment were built. A case of the modeling and size specification of the excavator cab for different drivers was given as the example to show the whole design process. The results shows that the development of ergonomics, computer aided concept design and anthropometry can help the designers to improve product development.
Advances in Simulation of Grinding Process
Authors: Guan Peng , Li Ji Qiang , Zhu Shuang , Yu Tian Biao , Wang Wan Shan
Published: October 2011

Grinding is an important method for precision machining and ultra-precision grinding. It is used to generate parts with high surface finish, high form accuracy and surface integrity. In recent years, grinding technology in precision machining and ultra-precision machining of ceramics, glass and high-strength alloys and other hard materials has been applied widely. Grinding process is complex, once known as "black processing technology." Computer simulation is an important method to research the grinding mechanism and optimize the grinding process parameters. Especially in recent years as the development of computer calculation speed, the improvement of computer graphics theory and the gradual maturity of artificial intelligence technology, experts and scholars whose research subject related grinding had done a lot of work on grinding simulation. This paper gives an overview of the current state of the art in simulation of grinding processes: Physical simulation (material removal mechanism, grinding force, grinding temperature, etc.) and geometrical simulation (surface topography and surface integrity) are taken into account, and outlined with respect to their achievements in this paper. Furthermore, the capabilities and the limitations of the presented simulation approaches will be exemplified.
Application of In Situ Chemical Oxidation for the Remediation of TPH-Contaminated Soils
Authors: Yang Bo Ming , Kao Chih Ming , Chen Chiu Wen , Sung Wen Pei , Surampalli Rao Y.
Published: October 2011

Soils at many existing and former industrial areas and disposal sites are contaminated by petroleum hydrocarbons. In this study, laboratory bench-scale experiments were performed to evaluate the effectiveness of applying in situ chemical oxidation (ISCO) on the treatment of petroleum-hydrocarbon contaminated soils. Three different oxidation processes including Fenton’s oxidation, persulfate oxidation, and permanganate oxidation were evaluated with initial total petroleum hydrocarbon (TPH) concentration of approximately 3,920 mg/kg. The major control factors were oxidant species (hydrogen peroxide, persulfate, permanganate) and soil to liquid volume ratios (1 to 3). The oxidant concentration was 5 wt.%. Ferrous iron was used as the catalyst during the Fenton’s oxidation and persulfate oxidation processes, and the oxidant to ferrous iron molar ratio was 1 to 0.1. Among these three oxidation processes, contaminated soils treated by permanganate oxidation had the highest TPH removal efficiency (94% of TPH removal) during 360 min of operation. Approximately 75 and 61% of TPH removal was observed in batch experiments applying Fenton’s oxidation and persulfate oxidation, respectively. Due to the consumption of ferrous iron (used as the catalytic chemical) in the early stage during the operational period, both persulfate and Fenton’s oxidation processes had less TPH removal efficiencies. Frequent supplement of catalyst is required when persulfate and Fenton’s oxidation is applied for field application. Results from this study indicate that the ISCO scheme is a feasible technology for the treatment of petroleum-hydrocarbon contaminated soils within a short treatment period. The experimental results can be used for a scale-up system for practical application.
Detecting Integer Bugs without Oracle Based on Metamorphic Testing Technique
Authors: Huang Song , Ji Meng Yu , Hui Zhan Wei , Duanmu Yi Ting
Published: October 2011

Integer bugs are considered to be the rising threat to mission-critical software. For the oracle problem, testers always ignore integer bugs unless program throws an exception obviously. In this paper, we propose a general procedure based on metamorphic testing to detect integer bugs without oracle and a strategy of the metamorphic relation selection as the complement to T.Y.Chen’ one. The experiment result shows that our approach can detect some invisible mission-critical software failures caused by integer bugs, which are difficult to be found in conventional formal method.
Current Problems Analysis and Solving Approaches for Chinese Undergraduate Practice Innovative Talents Training
Authors: Dong Jian Li , Hu Wen Bin , Hou Ming Liang
Published: October 2011

According to the current status of Chinese undergraduate education development and practical innovative talent training, the advantages and disadvantages of undergraduate Innovative talents training modes and exam-oriented education system in China’s colleges are analyzed and represented. And then, the problems faced and solved in the practical innovative talents training process are also discussed. Finally, the paper proposes some solving approaches and development strategies for training and improving Chinese undergraduate practical innovative abilities. These approaches and strategies are extracted from practical teaching experience and have important reference role for the undergraduate education.
Lamb Wave Ultrasonic Tomography for Edge Detecting of Material Loss in Isotropic Media
Authors: Xu Han Hui , Xu Chun Guang , Wang Li Jiu
Published: October 2011

The edge of material loss is crucial for material loss evaluation. Lamb wave tomography and model-based edge detecting have been used in isotropic media. Time of flight and velocity of lamb wave are ultrasonic signal features to reconstruct the edge map of material loss. The correlation technique is employed to get the time of arrival more accurate. An ellipse model is used to represent the defects with apparent directional property, and edge detecting will be realized by it. The reconstructed map shows clearly that edge detecting method in this paper is efficient for material loss detection.
Electricity Generating from Small Scale Solar Updraft Tower for Remote Area
Authors: Keawsuntia Yuttachai , Limsiri Cheevin , Prempridi Thamrong , Patamatamkul Sanguan
Published: October 2011

Solar updraft tower is an alternative technology for electricity generating from solar energy. It’s suitable for use in remote area, where there is high potential of solar radiation, because the constructions are cheap and the technologies involved are conventional. From the study of small scale solar updraft tower by using the computation fluid dynamics program and experimental, show that the hot air velocity in the solar updraft tower from the computation fluid dynamics program similarly with the experimental data. From this study, the small-scale solar updraft tower with 72 m length in each side of solar collector, air inlet height of 0.5 m above the ground, an updraft tower of 30 meter high with 1.2 m length of each side was studied to determine the performance. It was found that the electricity generating from this model was 6893 W/day, enough to supply electricity for up to 13 families of small community in the rural area.
Expert System Aided Multi-Agent Intelligent Ant Colony Optimization System
Authors: Zhao Jing Hua , Lin Jie
Published: October 2011

In the dynamic production environment of supply chain, based on information sharing among enterprises of supply chain, this paper designs an expert system aided multi-agent intelligent ant colony algorithm system to solve the production scheduling optimization model. Where ant colony is constructed with multi-agent and the order decomposition structure and constraint are expressed by expert system. And then it builds a system using JESS and JADE to confirm this algorithm applied in a mass customization supply chain scheduling model
Fuzzy Neural Network Market Clearing Power Price Forecasting Based on K-Means Clustering
Authors: Wei Xian Min
Published: October 2011

Normalized fuzzy neural network has complex structure, long-time study and other shortcomings. For these shortcomings, this paper applies an improved fuzzy neural network to predict market clearing price. The model is simple, just by k-means clustering to determine the number of fuzzy inference layer nodes, and with strong applicability, higher prediction accuracy.
Load Analysis of 2.5MW Offshore Wind Turbine Tower
Authors: Ji Cai Yun , Zhu Long Biao , Zhu Zhi Song
Published: October 2011

With the rapid development of wind power industry and the increasing tension of land resources, WTGS(Wind turbine generating set) changes from Onshore wind machine to offshore wind machine. Because the offshore wind turbine works in the complex environment, it is a higher challenge for tower security. This paper focuses on the load analysis of 2.5MW wind turbine tower, in which a segment solution is applied. Wind load is solved in the superior segment of tower. In the lower segment, the coupling factor of wind and wave is taken into account. Irregular waves are simulated on the basis of the linear wave theory, and then wave load is derived. Accordingly, loads on the tower are calculated by using MATLAB software, and the load spectrum of every node is drawn, which lays a foundation for the dynamic response analysis and fatigue life analysis of tower.
LabVIEW-Based Wireless Monitoring System of CNC Machine Tools
Authors: Sheng Zhong Qi , Liang Ze Zhong , Zhang Chao Biao , Dong Liang
Published: October 2011

As the development of industry wireless networks, sensor network, innovative sensors, radio frequency identification (RFID), and micro-electro-mechanical system (MEMS) technologies, the industry sector has made great progress in data acquisition, treatment, transfer and analysis, greatly expanded people’s ability to access information, and to control and use them. This paper developed a wireless data acquisition and storage system of CNC machine tools based on LabVIEW graphical programming language and IEEE 802.11 wireless communication protocol, effectively expanded the ability to access and use the CNC machine status information; solved the problem of data collection caused by the environment complexity of manufacture workshop and the hardness of wiring; eliminated the dead zone of manufacture workshop in the processing of the data acquisition of state information of bottom processing equipment; made the bottom machining unit no longer be the information island for manufacturing enterprises.
Prothesis Movements Pattern Recognition Based on Auto-Regressive Model and Wavelet Neural Network
Authors: Gao Cheng , Huang Jiao Ying , Guo Wei
Published: October 2011

Wavelet neural networks (WNN) combine the functions of time–frequency localization from the wavelet transform and of self-studying from the neural network, which make them particularly suitable for the classification of complex patterns. Based on auto-regressive (AR) model and WNN, pattern recognition of prothesis movements was studied in this paper. Firstly, an AR model was used to analysis the surface myoelectric signals (SMES) which recorded on the ulnar flexor carpi and extensor carpi region of the right hand in resting position. Four types of prosthesis movements are recognized by extracting four-order AR coefficient and construct them as eigenvector into WNN, which was used to study the correlation between SMES and wristwork. This paper compares the classification accuracy of four movements such as hand open (HO), hand close (HC), forearm intorsion (FI) and forearm extorsion (FE).The experimental results show that the proposed method can classify correctly for at least 93.75% of the test data.
Research on Quick Detection for Benzene and Absorption Performance for its Absorber at Specific Circumstance
Authors: Liu Gui Ling , Xia Xin , Ye Yun Fen
Published: October 2011

In this paper a specific circumstance is designed, in which two types of detectors are used for concentration of benzene vapor and result shows that two instruments gives the similar rule; Furthermore, absorption performance of three absorbers for benzene is studied by gravimetric method, then influence of enviroment temperature and gas-flow rate on absorption performance of optimal absorber for benzene are investigated and results show that such influence is clear.
Research on Image Feature Information of Resisting JPEG Compression
Authors: Wu Chao Kui , Huang Liang Yong
Published: October 2011

To solve the image feature information on the robustness of JPEG compression problems, we use the third layer of wavelet of images to decompose the approximation sub-band coefficients as the image feature information, analyze the characteristics of the discrete cosine transform in JPEG compression so as to compare the robustness of image feature information under different quality of JPEG compression. The experimental results show that: make the image compression quality factor more than the standard JPEG, the approximate sub-band coefficients of image wavelet as the image feature information has better robustness, and their difference is less than or equal to a smaller threshold.
Research on the Precise Equipment Support
Authors: Liu Xiao Liang , Chen Le , Liu Jia Ni , Yu Hong Min
Published: October 2011

This paper is oriented to typical operation missions, started with the concept and connotation of precise support, divided the precise support into three parts, including operational mission system, support target system and support system, systematically analyzed the mutual relationships among the subsystems, used operational readiness and mission sustainability these two parameters of integrated logistics support to make quantitative description, then discussed the running mode and process of precise equipment support.
Simulation Research on Post-Injection of Electronically Controlled Heavy-Duty Diesel Engine
Authors: Li Ming Hai , Jiang Feng , Liu Biao , Ouyang Ming Gao
Published: October 2011

GT-Suite software is used to establish the simulation model of electronic fuel injection system for 16V280ZJ diesel engine. Combustion process simulation calculation is conducted to the direct injection (DI) diesel engine based on a main-post double injection scheme. Simulation parameters are modified based on the comparison with given experimental results. The calculation results effectively reflect the influence of fuel ratio and the interval angle between main and post injection over emission and fuel economy. Finally, in order to improve the engine emissions and reduce the pressure rise rate, we get the optimal injection solution for the main-post injection mode.
Simulation on Laser Shock Strengthening of the Crankshaft
Authors: Wu Tie Jun , Wang Hong Jun
Published: October 2011

The residual stress distribution of fillet of the diesel engine crankshaft on laser shock processing was analyzed by ANSYS software. The simulation results compared with the experimental data, to get results as follows: the simulation results were basically consistent with the experimental data. This fully proved that the finite element simulation method and related simulation parameters were correct. The parameters of laser impacting were optimized by ANSYS simulation, and the residual stress favorable distribution of the crankshaft fillet was obtained.
The Simulation of CPV Model on Net-Work Products at the Successive Time
Authors: Zheng Wen , Hu Huang
Published: October 2011

Simulated the state of market competition by using simulation software with considering the influence of the product’s compatibility and product’s CPV, providing reasonable suggestions for manufacturers.
The Test Cases Generation from the UML Activity Diagram
Authors: Xie Tang Tang , Li Jun , Fang Yong Hui , Xiong Hai Ling
Published: October 2011

This paper analyzes the formal syntax and semantics of the UML activity diagram, then extends traditional test coverage criteria, puts forward the cover standards of the UML activity diagram , finally implements the test scenes generation algorithm and test tools, and has more help to improve the software quality.
UML-Based Two-Way Referral MIS Requirement Analysis
Authors: Shang Hang Biao , Li Ying , Cao Yu Kun , Tian Xin Jia
Published: October 2011

China’s community health services starts in 1997 and becomes the most important part of the urban health services system with the development of China’s social security system and community security. Two-way referral system in China came into being with the further development of community medical services. This paper studies the construction of two-way referral management information system based on the social security system platform using information management system and UML language based on the survey of the present implementation of two-way referral system. The two-way referral management information system includes the feasible analysis, the analysis of functional requirement, the on-stream analysis of two-way referral process, the on-stream analysis of two-way referral management information system, the design of functional configuration and functional module. The paper aims to reduce the cost of two-way referral and increase the visiting rate and medical care of community health service organization.
Multi-Mode Extension Control of Pump-Control Electro-Hydraulic Servo System Based on PLC
Authors: Zheng Hong Bo , Sun You Song , Li Mian , Xian Can Biao
Published: October 2011

To satisfy the requirements of rapidity, stability and accuracy in positioning of pump-control electro-hydraulic servo system, the paper designs a multi-mode extension control switcher, which can realize switchover between different control modes and give full play to each control mode to meet the requirements of control system for various performances. In order to apply this method to practice, the principle, the control algorithm process and part program segments of multi-mode extension control realized by Mitsubishi PLC was introduced, and experiments was done to verify the control effect. The result shows that multi-mode extension control of pump-control electro-hydraulic servo system using PLC can satisfy the demands of control system.
Evaluation on the Compressive Strength of Concrete Incorporating High Volume Blast-Furnace Slag Subjected to Initial Frost Damage
Authors: Koh Kyung Taek , Ryu Gum Sung , Ahn Ki Hong , Park Chun Jin , Lee Jang Hwa
Published: October 2011

Construction works that uses concrete incorporating a high volume of blast-furnace slag (BFS) during the winter season increases the risk of being subjected to initial frost damage as it noticeably delays setting and hardening. Assuming that the concrete incorporating a high volume of BFS was affected by freezing at an early age during the winter conditions, this study is to investigate the effect of strength degradation by early freezing and curing methods on compressive strength. As a result, freezing at early age highly degraded the compressive strength regardless of the types of concrete. After influenced by initial frost damage, water curing at 5°C improved the long-term strength and water curing at 30°C enhanced the long-term strength as well as the early strength.