bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Study of Mouth Guards Response under Impact Loading
Authors: Barou Jean Luc , Viot Philippe , Poisson Philippe
Published: August 2011

Mouthguard seems to be the best protection mean against dental injuries for sport application. The purpose of this study is to compare three different mouth guards under different condition of impacts closed to those observed on real-life shock loading. Specific devices were designed, firstly to pre-load and to form the mouthguard as it specified by the manufacturer; secondly to perform the different impacts on a very specific impact apparatus. Force and displacement were recorded as function of time. Those measurements were supplemented by a high speed video device to visualize the effect of the impact during the loading. A dissipated energy analysis was also performed.
Etching Process Effects of CMOS Transistor Gate Manufacturing Nanotechnology Fabrication Integration
Authors: Weng Chun Jen
Published: August 2011

As the nanotechnology gate is scaling down, the fabrication technology of gate spacer for CMOS transistor becomes more critical in manufacturing processes. For CMOS technologies, sidewall spacers play an important role in the control of short channel effects by offsetting ion implantation profiles from the edge of the gate. A sidewall spacer patterning technology yields critical dimension variations of minimum-sized features much smaller than that achieved by optical Complementary Metal–Oxide–Semiconductor (CMOS) fabrication processes integration. The present study is to overcome the fabrication limitations and more particularly focus on etching processes integration on structural and formation processing for complementary metal oxide semiconductor nanofabrication process on gate spacer technology and electrical characteristics performance of nanotechnology gate structure were included. Based on the investigation of the etching effect and interface film variation on the electrical characteristics of the gate oxide on etching profile and their impacts on the sidewall transistor gate structure, a novel etching integration process for optimal controlled sidewall gate spacer fabrication was developed.
Effect of Deformation Behavior on the Grain Size of the 6061 Aluminum Alloy Joint with Alumina by Friction Welding
Authors: Uday M. B. , Fauzi Mohd Noor Ahmad , Hussain Zuhailawati , Ismail A.B.
Published: August 2011

Friction welding is widely used as a mass-production method in various industries. Joining of ceramic-metal is one of the most essential needs of many industrial applications. Experiments were performed to observe the deformation characteristics of 6061 aluminum alloy after joining with alumina using friction-welding process at different rotational speeds and to relate difference in grain size with differences in deformation behavior. In the present study, electron microscopy and X-ray diffraction profile analysis were used to study the effect of plastic deformation of interface material on the grain size of 6061 aluminum alloy when there is a joint with the ceramic. The effect of rotation speed and the degree of deformation appeared to be high on the 6061 Al alloy than on the ceramic part. Results showed different deformation mechanisms at different rotational speeds and confirmed unambiguously the change in crystalline grains as a result of deformation mechanisms.
Multivariate Statistical Process Monitoring and Fault Diagnosis Based on an Integration Method of PCA-ICA and CSM
Authors: Yang Ying Hua , Chen Yong Lu , Chen Xiao Bo , Qin Shu Kai
Published: August 2011

In this paper, an approach for multivariate statistical process monitoring ans fault diagnosis based on an improved independent component analysis (ICA) and continuous string matching (CSM) is presented, which can detect and diagnose process fault faster and with higher confidence level. The trial on the Tennessee Eastman process demonstrates that the proposed method can diagnose the fault effectively. Comparison of the method with the well established principal component analysis is also made.
A Secondary Development System on Grader Working Device Oriented to Mechanism Optimization
Authors: Mu Rui , Zhao Na , Pan Yong Jun
Published: August 2011

Because of the complex structure of grader working device, its optimization is a repeated, continuously improved process. A new model has to be set up before each optimization. In order to solve the problem of repeating modeling and improve the product optimization efficiency, a second development system of working device is established. Parametric driving about working device is realized in term of spatial mechanism. At first, the overall design framework of this second development system was established, then customized user interface was completed based on UG/Open API and parametric programs about the working device system were complied based on UG/Open Grip subsequently. The connection among customized user interface, parametric programs and human-computer interaction was realized by using Visual C++, the integrated second development system design of working device was eventually completed. This second development system could not only provide engineers with a rapid design method to shorten the new product development cycle, but solve the problem of repeating modeling during optimization design as well.
The Application of the Baseline and Monitoring Methodologies to the Renewable Energy for Base Stations Project
Authors: Yang Tian Jian , Huang Jin
Published: August 2011

With the gradual increasing consciousness of reducing the CO2 emission around the world, more and more attention are paid to the study of CDM project and the methodologies which are used to determine the amount of Certified Emission Reductions. Based on the approved methodologies, we study the application of the methodologies to the practical situation of the renewable energy for the base stations. That provides very good foresight in combining the CDM project with the ICT industry technology.
Design and Study of Gate-Type Steel-Shuttering Jumbo for Tunnel Lining Based on CAD/CAE
Authors: Peng Wei Ping , Xia Jun Yi , Zhang Zhi Qiang
Published: August 2011

The gate-type steel-shuttering jumbo is key construction equipment for tunnel lining, which is usually designed for customization according to the shape and size of the tunnel. Aiming at the insufficiency of existing methods in the jumbo design, the CAD/CAE technology is introduced into the domains of the jumbo design. In this paper, the gate-type steel-shuttering jumbo for spillway lining in Xiluodu hydropower station is designed, and virtual assembly is established based on three-dimensional digital model using Pro/E software. The stress and strain of the jumbo under different working conditions are analyzed by ANSYS. The result of finite element analysis can be regarded as the basis of structure design and optimization of the jumbo, and can be used to verify the design feasibility at the same time.
Building New Reliable Wireless Network by Using Distributed Control
Authors: Wang Xin Ying
Published: August 2011

With the development of the pioneering deployments in multi-hop wireless networks, although the relative research have not proven successful. The performance of routing and transport is often unstable due to contention induced packet losses, especially when the network is large and the offered load is high. A reliable wireless network architecture by using distributed control for large-scale multi-hop wireless networks has been present in this paper, The design objective is to optimize the control performance. This control performance is a complex function of the network parameters, such as throughput, packet delay and packet loss probabilities. The goal of optimizing the control performance imposes implicit tradeoffs on the wireless network design as opposed to the explicit tradeoffs typical in wireless data and voice applications. Our analysis suggests that our approach will deliver improved service to users while greatly reducing support effort and cost.
MDO of the Transmission System Based Collaborative Optimization
Authors: Liu Yun
Published: August 2011

Collaborative Optimization has been studied a lot in recent years as an algorithm. The Collaborative Optimization is a strategy of a secondary optimization based on the consistency constrained optimization methods. Take ADT’s transmission system as research object, establish collaborative optimization model of the 45 tons ADT transmission system. Set vehicle dynamics and fuel economy as the ultimate optimization goal and then do collaborative optimization. It shows that the results of collaborative optimization methods is better than traditional design. The result is applied to the design of 45 tons ADT transmission system, it has a practical engineering significance.
Collision-Free Trajectory Generation for Waterway Surfaces of a PDC Drill Bit
Authors: Chen Xu Bing , Song Yang , Chen Han Xin
Published: August 2011

After describing geometric characteristics of a PDC drill bit’s waterway surfaces, an approach for collision-free trajectory generation are proposed. The trajectory is planned by an iso-parametric method firstly, while the tool orientations are determined by visibility cones, which are the bounded regions between the opposite surfaces of neighboring blade wing pairs. Tool orientations are produced by calculations of critical points and interpolations between them. Furthermore, the criterion of whether tool orientations pass through the constraint surface and the linear interpolation formula of tool orientations are given. The research has created conditions for the success machining of PDC drill bits, and related machining enterprises of impellers and propellers will also be benefited.
Experimental Research on Mechanical Calculation of Fascine Object’s Underwater Falling
Authors: Shi Jie , Zhang Xiao Lei , Yang Su Ting
Published: August 2011

Fascine objects can be applied in the process of emergency rescues in the Middle and Lower reaches of the Yellow River. Because fascine objects can improve the efficiency of rushing to deal with an emergency, adapt to changes in river bed conditions better, resist the erosion of water slide on riverbank and buttress and prevent the collapse of the embankment, they are applicable to rescuing grave dangerous situations such as river closure, advancing construction dams in waters, closing up levee breaches and so on. Based on the experimental study, the authors analyze the mechanical calculation results of fascine object’s underwater falling, and draw the relevant mechanical properties of fascine object’s underwater falling.
Particle Swarm Optimization Based Dimension Synthesis of the Experimental Mechanism for Elastic Bungee Jumping Ropes
Authors: Zhang Fu Xiang , Li Wen Zhong
Published: August 2011

In order to provide an experimental machine for elastic bungee jumping ropes, a prototype of experimental mechanism was designed, and its principles were analyzed. A dimension synthesis method of the experimental mechanism based on the particle swarm optimization (PSO) was brought forward. The aim of optimization was to find the optimized parameters of the mechanism by which the elastic bungee jumping ropes were pulled at the minimum swing angle. An optimization program of the PSO algorithm in the Matlab environment was developed and the optimal calculation was done. The result proved the validity of the algorithm. The calculation result showed that the optimal algorithm made the elastic bungee jumping ropes pulled at the minimum swing angle of only 8.783 degree, which was better than that of the handwork drawing method used by an engineer, so the parameters got by the PSO method can
The High Stress Soft Coal Seam Face Prediction Sensitive Index Critical Value Research
Authors: Zhang Yong Jiang
Published: August 2011

Huainan mining area for the serious outburst Xinzhuangzi B4 soft coal mines in high stress, In order to improve the mining face outburst forecast accuracy, reduce the amount of works against sudden, With the theoretical analysis, lab tests and field trials of the combination of a variety of means, Of pilot area received 56204 B4 coal mining Face of sensitive indicators of the critical value: S0＝4.0kg/m,K1=0.3 mL/(g·min1/2), The test area 1380m mining engineering application results show that the face is not obvious prediction accuracy rate of 100%. Study to determine the indicators and their threshold reasonable and effective, in line with the actual situation of test area, with a certain application value.
Application and Advance in Super-Hard Tool Material
Authors: Su Jing , Zhang Yu Hua , Wang Di
Published: August 2011

For the excellent properties, super-hard tool material has received much attention from researchers. The development of super-hard tool material for high-speed cutting could brought high machining quality and surface precision. For an engineer, adopt high performance of tool material, for example wearing resistance, high stability of PCD (polycrystalline diamond) and PCBN (poly cubic boron nitride) can get more information for obtaining higher finished surface quality that cannot acquire just by common cutting process. This paper introduces super-hard cutters materials (PCD and PCBN) development, and discusses several material properties. The features of materials used in different cutting fields are given.
Study on Hydrological Simulation of Jin River Based on SWAT-X Model
Authors: Fang Yu Jie , Zhou Wen Bin , Luo Ding Gui
Published: August 2011

Hydrological simulation is the basis of water resources management and utilization. In this study, Soil and Water Assessment Tool (SWAT) model was applied to Jin River Basin for hydrological simulation on ArcView3.3 platform. The basic database of Jin river Basin was built using ArcGis9.2. Based on the LH-OAT parameter sensitivity analysis, the sensitive parameters of runoff were identified, including CN2, Gwqmn, rchrg_dp, ESCO, sol_z, SLOPE, SOL_AWC, sol_k, Gwrevap, and then model parameters related to runoff were calibrated and validated using data observed in weifang, yifeng, shanggao and gaoan hydrological stations during 2001-2008. The simulation showed that the simulated values were reasonably comparable to the observed data (Re<20%, R2 >0.7 and Nash-suttcliffe > 0.7), suggesting the validity of SWAT model in Jin River Basin.
Investigation on the Heat Exchange Characteristics of the Condenser for Space Applications
Authors: Liu Jie , Zhou En Ze , Zhao Wen Jun , Li Shuang Shuang
Published: August 2011

In this paper, the characteristics of a special condenser for space thermal control were investigated. In order to compare the thermoresistance getting from different formulas, both single-phase and two-phase fluid in the condensers were calculated. The results present that the thermoresistance has a uniform value for single-phase and a large variance for two-phase fluid. Therefore, experiences were performed to clearly comprehend two-phase fluid performance in the condenser. From the experiments, it demonstrates that the condenser thermoresistance has decreased with the heat load increasing under the same mass flow rate. The analyzes points out that the thermoresistance caused by contact plays a more importance role for the condenser heat rejection capacity.
Experimental Investigation on the Accumulator Liquid Distribution of Mechanically Pumped Cooling System
Authors: Liu Jie , He Yun Feng , Zhou En Ze , Zhao Wen Jun
Published: August 2011

The two-phase mechanical pumped cooling loop is a promising thermal control system which is just like a heat pipe to realize heat extraction from ener-electrical equipment by phase change efficiently. In order to apply this technology for the space thermal control systems, transient tests have been performed to clearly comprehend its performance and to characterize operation in different conditions. Special attention has been paid to the system dynamic working characteristics under different conditions such as variation heat load and mass flow. According to the experimental findings, the transient liquid transfer between the main loop and accumulator was analyzed to explain the transient phenomena during the experiments. From the experiments, it is demonstrated that when mass flow increases or heat load decreases, work fluid would flow out of the accumulator because of vapour quality changing. On the contrary, when mass flow decreases or heat load increases, work fluid would flow back to the accumulator .The paper also presents that accumulator is just like the “brain” of the system and each action of the vapour-liquid interface would cause the temperature or pressure change of the evaporator.
Impact of Different Film-Cooling Modes at Trailing Edge on the Aerodynamic Performance of Heavy Duty Gas Turbine Cascade
Authors: Liu Xun , Wang Song Tao , Zhou Xun , Feng Guo Tai
Published: August 2011

In this paper, the trailing edge film cooling flow field of a heavy duty gas turbine cascade has been studied by central difference scheme and multi-block grid technique. The research is based on the three-dimensional N-S equation solver. By way of analysis of the temperature field, the distribution of profile pressure, and the distribution of film-cooling adiabatic effectiveness in the region of trailing edge with different cool air injection mass and different angles, it is found that the impact on the film-cooling adiabatic effectiveness is slightly by changing the injection mass. The distribution of profile pressure dropped intensely at the pressure side near the injection holes line with the large mass cooling air. The cooling effect is good in the region of trailing edge while the injection air is along the direction of stream.
The Design of SVM-Based Fitness Consulting CAD System
Authors: Wang Yong Qing , Li Qing Xiu
Published: August 2011

The traditional methods of fitness consulting are confined to medical and hygienic science, which can not meet the requirements of development in modern society. We apply in this paper the method of Support Vector Machines (SVM) to the design of fitness consulting CAD system. The consulting results demonstrate competive performance both in training time and approximation to the domain expert knowledge.
Readout Circuit for Uncooled Pyroelectric IRFPA
Authors: Lu Fei Bao , Lu Guo Lin , Huang You Shu , Yuan Xiang Hui
Published: August 2011

A 320×240 readout circuit (ROIC) for the uncooled pyroelectric infrared detector was fabricated in the double-poly-double-metal (DPDM) N-well CMOS technology. Composed of X- and Y-shift register, column amplifier and correlated double sampling (CDS) circuit, the readout circuit integrated signal from the detector for frame time. It has the pitch of 50um and power dissipation of less than 50 mW. The circuit configuration, operation and testing result are described. Testing result indicates that the designed circuit meets with the requirement. Thermal images were obtained by the hybrid-integrated sensing array.
Optimum Design of Multi-Axle Trailer’s Steering Mechanism Based on ADAMS
Authors: Liu Yun
Published: August 2011

Take the German Scheuerler’s four-axle trailer steering mechanism for the study, establish the simulation model of the steering system. After this, the simulation optimization and analysis to model was done with ADAMS software. The results of the analysis show that the objective function’s value of the optimal vehicle steering mechanism model is superior to the objective function’s value of the initial model.
Discussion on the Design of a New Type Down-Hole BOP
Authors: Yang Qi Ming , Fu Ying , Guo Cun Yong
Published: August 2011

There was a new down-hole BOP that was designed to control blowout effectively in exploiting petroleum gas. The BOP was a new blowout preventer with a good development prospect which can not only automatically shut underground, but also control and automatically discharge shut up-hole state on the ground. Through introducing structure and working principle of the BOP, as well as the finite element analysis of some key components, there has been showed that the down-hole blowout preventer met the strength requirements and had relatively high security. The down-hole blowout preventer with a simple structure can not only work reliably but also complete the act of preventing blowout and unlocking many times to prevent blowout effectively and to improve drilling operations safety and efficiency. It will have a bright development prospect.
The Design of Automatic Rotary-Rivet-Placing System
Authors: Zou Jia , Li Ke Tian , Liu An Ji , Li Jun Chao , Zhou Wei Bing
Published: August 2011

The Auto Rivet-Placing System was designed to replace the existing manual operation which was hard to ensure the precision and the inefficiencies caused by human fatigue. The paper analyzed the details of the whole system including the transmission, drive, and control of the mechanisms especially manipulator and plat. The model of manipulator and other mechanisms in the system were designed in the human-oriented modeling environment of Pro/E especially some important parts. The control system was at work with image positioning technology.
Calculation and Analysis of Microstructure of Austenitic Steel for Supercritical Unit
Authors: Li Dong Sheng , Chen Xi Zhang , Dai Qi Xun
Published: August 2011

Microstructure and the precipitated high temperature ferrite δ phase of an austenitic steel 10Cr18Ni9NbCu3BN tube was investigated. It reveals that segregation during solidification process results in the precipitation of high temperature ferrite. The calculated amount of δ phase was consistent with our XRD analysis. With decreasing solution treatment temperature, Nb-containing phase will be refined and the amount of δ phase as well as process-cost can be reduced. Because of the highest performance/cost ratio, austenitic super 304H steel is applied as pressure component under supercritical conditions. It was originally developed by Sumitomo Metal Industries, Ltd and Mitsubishi. Based on 304H, Super304H has lowered the upper limit of Mn, but added Nb, N and Cu. Elements Nb and N can form stable NbN,Nb(C,N)-phase, so as to refine the grain size and result in precipitation-hardening. Cu can form coherent segregation phase which also has the hardening effect, decreases the hardening rates in the cold-working process and improves the plastic formation of steel. In this kind of steel, the main strengthening phases are copper-rich phase, MCs. The alloying effect of elements Nb,N and Cu can increase allowable stress and service life of the steel under the working temperature[1]. In this paper, experimental and theoretical analysis was carried out in order to develop new 10Cr18Ni9NbCu3BN steel tube. In accordance with ASME code case 2328-1, the contents of steel 10Cr18Ni9NbCu3BN were listed as follows in Table 1.
Development for the Optimization Technique of the Coiling Tension in Degreasing Unit
Authors: Bai Zhen Hua , Zhou Qing Tian , Shi Xiao Dong , Si Hong Xin , He Gao , Zhang Dong Dong
Published: August 2011

As to the production of degreasing unit, fully integrated with the equipment and technological features of the line, the approach for the setting of coiling tension was changed, which was mainly tabular method in the past. Under the new idea, the degreasing process was closely integrated with the bell-type annealing for the first time. Then, to minimize the severity of stick breaks was set as the objective function, and no loose coil and no heart-shaped coil is took as the constraint condition. On these bases, a new comprehensive optimization model for the setting of coiling tension in degreasing unit was put forward. The relation between coiling tension and coil radius was obtained, which was a quadratic curve. This simple and practical technology can make the distribution of internal stress of coil more reasonable, and reduce the incidence of stick breaks, loose coil and heart-shaped coil defects effectively and improve production efficiency, quality and the metal yield.
Research on Structural Parameters of Conical Nozzle
Authors: Huang Zhong Hua , Xie Ya
Published: August 2011

Inner flow field numerical simulation model of conical nozzle was established. The relationship between conical nozzle structural parameters and its performance were obtained with simulation research. Simulation results show that the maximum outlet velocity of conical nozzle and the fluctuation range of radial velocity at outlet are determined by its convergence angle α and slenderness ratio Cp. With the increasing of α, the maximum outlet velocity of nozzle is increased at first and then reduced. When α is small, the fluctuation range of radial velocity at outlet is minute. When α is big, the fluctuation range of radial velocity at outlet is dramatic. With the increasing of Cp, the maximum outlet velocity of nozzle is increased at first and then reduced. When Cp is small, the fluctuation range of radial velocity at outlet is obvious. When Cp is big, the fluctuation range of radial velocity at outlet is minute. The optimal structural parameters of the nozzle are α = 40°, Cp =30°. Experiments of conical nozzle performance with different α were carried out. Experimental results show that ejection range of water jet is maximal when α = 40°.
The Influence of Green Therapy
Authors: Cao Wei , Dong Li Li
Published: August 2011

This paper, on the basis of research achievements of green therapy, uses questionaire survey to discuss the feasibility of music group therapy and then set relative activity courses. By analyzing the effects of these courses, the paper investigates the influence of group therapy on college students’ SCL – 90.
Research on Machining Methods of Turning Trapezoidal Thread for Slender Axle on Lathe
Authors: Feng Jin Chun , Chen Wen Bing , Liu Xu , Huang Song He , Hong Qi
Published: August 2011

There were a lot of common points in turning the slender trapezoidal thread and the triangular thread on the common lathe, but there were also respective special features, because the trapezoidal thread used in machinery's transmission spot, the accuracy requirement was high, and during the machining, it was more complicated to turn the slender trapezoidal thread on the common lathe than the triangular thread. As long as control its processing rule, and adopts the correct processing method, we definitely may machine the high accuracy thread, this article elaborates ways and means of machining trapezoidal thread on slender axis, the machining of the trapezoidal thread for the slender axle can provide the experience and reference basis for such parts in the future. Introduction
Analysis of Milling Forces in Slot Milling of Aluminum Alloy with Three Flutes Cutter
Authors: Yuan Ping , Dong Hui Yue
Published: August 2011

A new finite element simulation model based on two trochoidal tool-paths was constructed, and was used to simulate a full immersed milling with three flutes cutter. In this FEM model, the special method used here is to construct two trochoidal curves at the beginning with an offset value which is just equal to the feed value per tooth. These two linked trochoidal curves represent tool paths generated by two flutes respectively so as to construct the workpiece model. Cutting forces in the feed direction and in the normal direction were analyzed in detail. A verifying experiment shows this simulation is credible in general. This method can also be applied into situations of milling with more flutes such as face milling.
Rapid Design of Low-Voltage Motor Protector Based on Axiomatic Theory
Authors: Xu Li Yun , Chen Hai Jiang , Li Ai Ping , Matta Andrea
Published: August 2011

Facing the diversified demands and design complexity, a systematic design method for low-voltage motor protector is proposed based on axiomatic design theory, which integrates with design constraints and expert's knowledge. Zigzagging mapping between functional requirements and design parameters is obtained by the top-to-down decomposition according to the customer's needs, and the hierarchy of independent functions is also built. Systematic chart and mapping process are also analyzed in order to simplify the design process for different designers. Finally, a case of motor protector of LM5 series is illustrated to verify the method’s feasibility and effectiveness.
Curing Kinetics of Octaepoxysilsesquioxane/MNA System
Authors: Zhang Zeng Ping , Liang Guo Zheng , Chen Shuan Fa
Published: August 2011

Polyhedral oligomeric silsesquioxane (POSS) can be added to polymers to prepare the organic/inorganic hybrid materials. Octaepoxysilsesquioxane (E-POSS) containing eight reactive epoxy groups in a molecule is one of the important POSSs. E-POSS was cured with methylnadic anhydride (MNA) in this study. The curing kinetics of the E-POSS/MNA system was studied by using differential scanning calorimetry (DSC). Two different kinds of methods, Kinssinger and Flynn-Wall-Ozawa, were used to calculate the activation energy and pre-exponential factor of the curing reaction.
Investigation of Annealing Effect on the Electrical and Optical Properties of ITO Film Prepared by Sol-Gel Process
Authors: Li Jing , Zhao Xiao Dong
Published: August 2011

Indium tin oxide thin film (ITO film) has been deposited onto the quartz glass by a sol-gel process, followed by annealing in air. The temperature range from 200 to 800 °C and the annealing effect on the optical, electrical and structural properties of ITO films has been studied in detail. ITO Films with a thickness of 100nm had an optical transparency up to 90% in the wavelength range of visible spectrum. The ITO film showed minimum resistivity of 1.65×10-3Ω.cm-1 when annealing temperature was 600°C in air. the rapid annealing process may contribute to the electrical property of ITO film for the densification of the micro structure. but the process may lead to the decrease of transparency for the reflection caused by grain boundary.
Application Design of CAN Bus (CANOpen) for Rotary Screen Printing Machine
Authors: Kang Xue Juan , Jing Jun Feng , Li Jia Kun , He Qing
Published: August 2011

The background of this paper is Rotary Screen Printing Machine(RSPM),and the paper need to resolve the printing flower dislocation phenomenon caused by synchronization between each motor, and by the synchronization between rotary screen motor and the conduction band. The paper presented overall scheme, and analyzed, designed and realized synchronous control arithmetic design based on system hardware platform. Through some related experimental results proved that the distributed system based on CAN bus(CANOpen protocol) worked stably, each motor transmitted independently and could run synchronously , and the results verified the correctness and feasibility of distributed structure scheme used for RSPM system.
Experiment Platform Design cSPACE-Based for a Permanent Magnet Linear Synchronous Motor Driven Inverted Pendulum
Authors: Cao Rong Min , Zhou Hui Xing , Ma Rong Hua
Published: August 2011

Permanent magnet linear synchronous motor (PMLSM) driven inverted pendulum is a new member of present similar devices, various unexpected disturbances such as lag effect of a belt attached to a cart and errors caused by a rotary encoder while detecting the position of a cart can be eliminated or reduced to a small range.In this paper, ironless permanent magnet synchronous linear motor driven inverted pendulum experiment platform is developed. The plant is hardware in the loop real time simulation control development system (Hardware-in-Loop, HIL)based on TMS320F2812DSP and MATLAB, it can use simple and efficient way to achieve linear motor driven inverted pendulum real-time control. Long design time for programming and debugging difficulty are avoided for traditional programming language. Control algorithm can be investigated directly on MATLAB/Simulink, and can be generated automatically control code to control single and double -stage inverted pendulum system. The real performance of the driven inverted pendulum is researched in this paper, the results showed that the controllability of the driven inverted pendulum is fine.
Digital Filter Design in Power’s Harmonic Wave Detection
Authors: Liu Yu Liang , Zhang Yu Lian , Chen S.
Published: August 2011

Pollution harness of industry power mainly depends on high-accuracy harmonic signal detection. In this paper digital filtering technology and instantaneous reactive power theory are used to detect power harmonic signal and the main motive is to reduce the computation amount. A low-pass filter with Butterworth style is designed and its effectiveness to detect the second-order harmonic wave is shown by numerical simulation.
Acquisition and Analysis on 3D Deformation of Windshield Glass in Vehicle-Pedestrian Accident
Authors: Chen Tao , Wu Shuai Jing , Shang Jian Wei , Wei Lang
Published: August 2011

A method based on the 3D laser scanning is proposed for obtaining and analyzing the windshield's deformation in vehicle-pedestrian accident. With an actual traffic accident of vehicle-pedestrian collision taken for example, point cloud data of windshield’s deformation is scanned by EXAScan 3D laser scanner and the deformed 3D NURBS surface is obtained after fitting process. Based on the discussion about characteristics of curved surface of the vehicle’s front windshield and the principle of continuous curvature, this paper conducts a surface fitting with cubic non-uniform spline according to geometric information of grid surface around the deformation zone, and obtains the pre-deformed surface of windshield by sampling with spline curve. Compared with the pre-deformed surface of vehicle’s windshield, the maximum deformation depth is 48.509mm and its area is 0.3816m2on the right side, while the maximum deformation depth is 36.341mm and its area is 0.2529m2on the left side. The application results in actual traffic accident show that this method can be used to obtain 3D deformation information of overall impact area, which provide a new method for accurately inspecting the windshield’s deformation in vehicle-pedestrian accident. This method also provides a new research idea for quantitative saving the evidence in permanent, and it also has a great value in accident analysis and reconstruction.
Influence of Mo/Sb Co-Doping on Scintillation Properties of PbWO4 Crystal
Authors: Ma Qing , Shen Si Qing , Xu Zhi Bin , Xie Jian Jun , Yuan Hui , Shi Ying , Xiong Wei , Xu Jia Yue
Published: August 2011

Lead tungstate, PbWO4 single crystals co-doped with Mo6+ and Sb3+ ions were grown using the modified Bridgman method. The X-ray powder diffraction, optical transmission, X-ray excited luminescence, photoluminescence, light output and decay time have been investigated. Compared to non-doped PbWO4, the co-doped PbWO4:(Mo,Sb) crystals exhibit improved transmittance in the short wavelength region. Luminescence and light output measurements demonstrated that Mo6+ and Sb3+ co-doping could enhance the luminescence of PbWO4 and increase the light output to about 7.0% of Bi4Ge3O12 crystal. Doped Mo6+ and Sb3+ ions in PbWO4 were tentatively considered to occupy W and Pb sublattice sites mostly. The second excitation peak at 385 nm, which is the second effective excitation for the enhanced blue-green emission in as-grown PbWO4:(Mo,Sb) crystal, should be related to [MoO4]2- group and oxygen vacancy.
Preparation and Properties of Polyvinyl Alcohol (PVA)/Polyvinyl Pyrrolidone (PVP) Hydrogel
Authors: Zhang Shu Di , Zhai Yu Chun , Zhang Zhen Fang
Published: August 2011

Polyvinyl alcohol (PVA)/polyvinyl pyrrolidone (PVP) hydrogel has been fabricated using freezing-thawing method. The tensile strengthen and swelling properties were tested. The results show that hydrogels mechanical properties are better, reach to about 0.7 MPa, 15% PVA/10% PVP hydrogel is the best, up to 0.82MPa; swelling properties are better, The loss water rate and swelling percentage of hydro gel have similar change trend in the room temperature; When the swelling equilibrium, 10% PVA hydrogel loss water rate is very rapid, the swelling percentage of 15% PVA hydrogel is relatively rapid; The rate of loss water of all hydrogels are more than 70 percent, 10% PVA/3% PVP hydrogel loss water is the fastest, the loss rate is up to 90%; swelling percentage of all hydrogels are over 400%, 15%PVA/8% PVP hydrogel is the highest, close to 600%.
Preparation and Photocatalytic Activity of Laden SiO2/TiO2 Composite Photocatalyst
Authors: Yan Ai , Huang Wen Yan , Lv Yuan Cai , Liu Ming Hua
Published: August 2011

SiO2/TiO2 photocatalyst was prepared by a sol-gel method applying tetrabutyl titanate as the precursor and cullets as the carrier. The optimal preparing conditions of the SiO2/TiO2 composite photocatalyst were optimized. The optimal conditions included 2:1 of the molar ratio of tetraethyl orthosilicate to tetrabutyl titanate, 3 load times, 600°C of calcinations temperature, 3 h of calcination time, 3 mL of the dosage of CH3COOH and 5:1 of the molar ratio of water to tetrabutyl titanate. The photodegradation percentage of methylene blue could reach 92.26% under the above optimal conditions. Moreover, after three times of the repeated use, the SiO2/TiO2 composite photocatalyst still had a relatively high catalytic activity and stability, and the recycle percentage of the photocatalyst could reach 92.80%.
Modification of Polishing Putty: A Study on Inorganic Filler
Authors: Bi Chun Bo , Lin Jian Guang , Hao Zeng Chuan
Published: August 2011

The microstructure of talcum powder added with the KH550、KH560 and silane composite coupling agent were studied by atomic force microscope, the modified effect of KH560 coupling agent was the best, which verified through the microstructure analysis and the wetting contact Angle proved law method. The relationship between the dosage of KH560 coupling agent and contact angle was analyzed by the wetting contact Angle proved law method. The optimum dosage of KH560 coupling agent was determined by the experimental results of the viscosity of polishing putty.
The Research of Silica-Coated Chromium Oxide Green Pigment Prepared by Liquid Phase Method
Authors: Zhang Hong Yan , Wang Jin Hua , Zhang Li Fang , Wang Li Li
Published: August 2011

This paper is researched on SiO2-coated Cr2O3 for the hydrolysis reaction of tetraethyl orthosilicate. The influences of precursors, solid contents of suspension and Si ratio of water on coated particle surface are investigated. The products are characterized and the conclusion shows that the experimental method is feasible.
Octaepoxysilsesquioxane Cured by Different Curing Agents
Authors: Zhang Zeng Ping , Liang Guo Zheng , Chen Shuan Fa
Published: August 2011

Polyhedral oligomeric silsesquioxane (POSS) can be used to prepare organic/inorganic hybrid materials. Octaepoxysilsesquioxane (E-POSS) containing eight reactive epoxy groups in a molecule was synthesized through the hydrolysis and condensation reaction of γ-[(2,3)-epoxypropoxy] propyltrimethoxysilicane. In this study, E-POSS was cured with 4,4'-Diaminodiphenylsulfone diamine (DDS) and methylnadic anhydride (MNA) , respectively. The curing reactions for both systems were monitored by Fourier transforms infrared spectroscopy (FT-IR). And the thermal properties of the cured systems were studied by Thermogravimetric analysis (TGA). The disappearance of the epoxy groups showed that either DDS or MNA was able to cure E-POSS into an organic-inorganic hybrid system with excellent thermal stability.
Drive Spindle Simulation for Continuous Rolling
Authors: Li Zeng Feng , Zheng Shen Bai , Liu Yan Qin
Published: August 2011

In rolling system, there are some drive spindles. While simulating rolling processes, these drive spindles need to be merged into one, and the one merged is described by dynamic model module. According to loading state, the working process of drive spindle is divided into normal stage, critical stage, and over loading stage. The syntony strength of drive spindle is judged with material performance and working frequency.
A Preliminary Investigation on Friction Stir Spot Welding of Steel/Mg
Authors: Wang Xi Jing , Zhang Chang Qing , Li Bo Qiang , Li Tian
Published: August 2011

Dissimilar metal of Steel and Magnesium alloy used for friction stir spot welding is studied. Based on using orthogonal test method optimizes the process parameters and gets satisfactory joints , SEM is used to observe the features of joint,XRD is applied to determine the joint phase, and the results show that: the design of rotating tool without pin is reasonable and it can form satisfactory joints without keyhole of spot welding. The performance of spot welding joint depends on the extent of diffusion of Zn and Mg and high weld consistency. There is small existence of intermetallics made of MgZn2,Mg0.97Zn0.03 in welding joint.The properties of joint depends on the intermetallics, Due to this,The microhardness of joint increases gradually from the magnesium side to steel side.
Effect of Sintering Temperature on Microstructure of Porous Materials Using Iron Tailing and Shale
Authors: Xiao Hui , Lv Yang , Ma Bao Guo
Published: August 2011

A type of porous material was prepared mainly using iron tailings and shale, adding foaming agent, fusing agent and flexibility agent. To determine the sintering system of porous materials basing on iron tailing and shale, the effect of sintering temperature on the microstructure of the samples was investigated by XRD and SEM as well as section topography. The results indicate that both the porosity and pore size of the samples become higher and bigger respectively as sintering temperature increases from 1100°C to 1130°C, while mineral phase anorthite decreases; when sintered at 1120°C, the size of pores is approximately the same with the mean pore size of 1.5mm; the pores are larger and some get connected to the adjacent pores when the sintering temperature increases to 1130°C.
Research on Noise Generation Mechanism of Rubber Material for Water-Lubricated Bearings
Authors: Peng En Gao , Liu Zheng Lin , Lan Fang , Zhang Sheng Dong , Dai Ming Cheng
Published: August 2011

When the marine water-lubricated bearings are working in starting or stopping stage, they will be in low speed, heavy load and bad lubrication conditions, which would bring vibration and noise. Therefore, doing research on noise mechanism of rubber material has important theory significance and engineering practical value. This research is mainly based on tribological test of rubber material, and using pulse vibration analysis platform for data acquisition and spectrum analysis of the vibration generated in rubber material tribological test. And the influencing law of load, speed and temperature on noise are discussed. It has been proved that the noise is mainly affected by the speed, temperature and less affected by the load.
Visual Inspection on Premature Failure of Electric Motor Bearings
Authors: Sutjipto Agus Geter Edy , Triwiyanto A. , Aminanda Yulfian , Faris Waleed Fekry , Adesta Erry Yulian Triblas
Published: August 2011

All electrical motor or generator bearings can potential suffers from electric erosion. Unfortunately, problems can start after just a few months of running a new electric motor or generator. From visual inspection, it was found that the failure happened on the raceway surface in equal spacing. There may be many reasons for this – heavier loading than has been anticipated, inadequate or unsuitable lubrication, careless handling, ineffective sealing, or fits that are too tight, with resultant insufficient internal bearing clearance. Each of these factors produces its own particular type of damage and leaves its own special imprint on the bearing. Consequently, by examining a damaged bearing such as visual inspection, it is possible, in the majority of cases, to form an opinion on the cause of the damage and to take the requisite action to prevent a recurrence.
Finite Element Thermo Analysis of Friction Material Enhanced by Bamboo Fiber
Authors: Sun Jun Jie , Wang Zhi Qin , Wang Bao Gang , Ye Wei , Ma Yun Hai
Published: August 2011

The manufacturing engineering of bamboo fiber reinforced friction material was introduced in this paper. ANSYS was used to do adaptive meshing and establish the contact, impose constraints load and solve, then the temperature field of bamboo fiber reinforced friction material was obtained. The results showed that under the coupling effect of friction heat and pressure, Brake blocks and brake discs in the contact area showed local changes in temperature and stress characteristics. The thermal stress of coupled parts contact surface showed a inhomogeneous distribution. Contact pressure distribution and temperature distribution interact each other, the contact pressure distribution of the coupled parts affects the temperature distribution, and the local feature of temperature distribution of the coupled parts conversely affects the contact pressure distribution. It will provide an important theoretical basis for devising friction brake and selecting material of the friction pair.
High Performance 785 nm Wavelength Super-Luminescent Diodes
Authors: Zhang Si Yu , Qiao Zhong Liang , Gao Xin , Qu Yi , Liu Guo Jun , Bo Bao Xue
Published: August 2011

High-performance 785 nm wavelength super-luminescent diodes (SLDs) with ring cavity were fabricated. The maximum output power of 100 mW was obtained in continuous wave (CW) mode under room temperature. The full width at half maximum (FWHM) of the emission spectrum was 24 nm.
Influence of Gain Dispersion on the Propagation Characteristics of Ultrashort Optical Pulses in Distributed Fiber Amplifiers
Authors: Zhou Xiao Hong , Wang Ze Yong , Wang Li , Gao Xiao Rong , Luo Bin
Published: August 2011

The physical model for the optical pulse propagating in the amplifier has been established. Within the normal dispersion region of the fiber, the evolution of the optical pulse in the amplifier has been simulated numerically, and the influence of gain dispersion on the propagation characteristics of the pulse has been discussed emphatically. The results show that, during the propagation of the ultrashort optical pulse in a distributed fiber amplifier, group velocity dispersion and Kerr nonlinear effect will affect the pulse profile and spectrum. For the ultrashort optical pulse with a wideband spectrum, the influence of gain spectrum on the propagation characteristics of the optical pulse, in essence, is that of gain dispersion, which is equivalent to a loss mechanism and will generate gain narrowing effect, so it should be considered in the design of an amplifier system.
The Effect of Silver Ion Catalysis on Bioleaching of Chalcopyrite Tailings
Authors: Liu Jin , Li Dong Wei , Zhang Shao Jian , Li Dou , Yu Lin
Published: August 2011

The bioleaching effect of different concentrations of silver ion catalysis on chalcopyrite tailings has been investigated in shaking flasks. In this paper, A.t ferrooxidans were selected for conducting the bioleaching process. Experiments were carried out under the condition of pulp density 150 g/L, inoculation amount 106~7 cells/mL, pH around 2.0, culture temperature 30°C, rotation speed 150 r/min. The silver ion concentrations varied from 0 to 0.05g/L. After a bioleaching time of 24 days, 82% and 55% of copper was dissolved from the ore for the silver ion concentration of 0.01 g/L and 0.001 g/L respectively, compared with only 37% and 13% recovery for the silver ion concentration of 0 and 0.05 g/L. Preliminary tests showed that the silver ion concentration had a markedly catalytic effect on the copper extraction. The experimental results also showed that high silver ion concentration would inhibit the copper extraction. That was because the silver ions at high concentrations are toxic and they can suppress the bacteria growth and oxidation activity.