bluuebunny/crossref_metadata_2025 huggingface dataset:
Spraying Pattern Overlap and Movement Design of Automatic Electrostatic Top Spraying Machine
Authors: Han Hong Zhi , An Yan Song , Zhang Da Wei , Zhu Wei
Published: August 2013

The high-speed spinning bell electrostatic automatic machine is the key equipment of the automotive coating line. A simplified mathematical model of the process of spraying aggradation was proposed by analyzing the working principle of electrostatic spray. Furthermore, the relationships among spraying distance, spraying speed and number of spraying pattern overlap were investigated and revealed. And the expressions for the velocities of both side spraying machine and top spraying machine are derived. This work provides an important theoretical basis for the spraying trajectory planning
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Research on BP Based Fuzzy-PID Controller for Anti-Lock Braking System
Authors: Liu Yue , Jin Li Qiang , Liang Xin Lu , Zheng Zhu An
Published: August 2013

Control methods of the anti-lock braking system have been researched. A BP based Fuzzy-PID controller is proposed to reduce the time and the distance during braking. Through the compare of PID controller and fuzzy-PID controller and the BP based Fuzzy-PID controller which were simulated on Matlab/Simulink, it shows that BP based Fuzzy-PID controller has shorter braking distance and less braking time. So ABS with BP based Fuzzy-PID controller will work better than traditional PID controller.
Towards Knowledge-Oriented Smart Vehicle Adaptive Traffic Service
Authors: Kim Jeong Sig , Kim Jin Hong
Published: August 2013

The most of very large traffic system by growing the variety of services, the relationships between the vehicle network and the infrastructure are more complex. Moreover, intelligent transportation systems are getting more and more to develop a better combination of travel safety and efficiency since long time ago. Vehicle is being evolved and traffic environment is especially also organized well-defined schedules priorities, which is real time based wireless network traffic condition, variable traffic condition, and traffic pattern from the vehicle navigation system. Accordingly, we propose to Knowledge-oriented Smart Vehicle Adaptive Traffic Service using genetic algorithm in this paper.
Numerical Simulation of Influence of Different Deflectors on Aerodynamic Characteristics of the Heavy Duty Truck
Authors: Liu Yu Kun , Li Qi Fei , Li Guan Qun , Liu Ao , Hu Xing Jun
Published: August 2013

In order to reduce the aerodynamic drag of heavy-duty truck, four different shape and style of deflectors based on the original one are added. With the method of numerical simulation, the influence of deflector on the flow field of the cab and the vehicle was analyzed, and the mechanism of aerodynamic drag and the measures of drag reduction were discussed in the study. When driving at speed of 30m/s, the aerodynamic drag will be significantly reduced with the contributions of all the four deflectors. The optimal solution can reach a reduction about 14%.
A Novel Design of Automatic Welding System for White Watermarks
Authors: Cao Xiu Quan , Yu De Ping , Li Chao , Yao Jin
Published: August 2013

Watermarks, which are often used as security features of banknotes to prevent counterfeiting, are made onto the banknote paper using the dandy roll that is a roller of copper net with white watermarks accurately welded on it. The positioning accuracy of the white watermarks on the copper net is critical. However, the current technologies are inefficient, inaccurate and/or expensive. Therefore, in this paper a novel design of automatic system for white watermark is proposed. It is realized by thorough analysis of the welding procedure of the white watermark, design of a novel mechanical structure for the automatic feeding and accurate positioning of the white watermark to its welding position on the copper net and integration with the available spot welder. Compared with the current technologies, the proposed design could greatly improve the efficiency and accuracy for welding the white watermarks, and its total cost is low. Therefore, the proposed design could be adopted in the banknote printing industry to realize the automatic welding of the white watermarks.
Research on Semantic SOA Framework Construction Oriented with Aviation Manufacturing
Authors: Xu Feng , Zhang Shu Sheng
Published: August 2013

With the background of the Aviation repair service industry, based on the analysis of the disadvantages of the past information technology solutions used in aviation repair management system, combined with the product lifecycle management concept, an aviation repair system structure based on the semantic service oriented architecture was built, which includes resource layer, basic structure layer, implementation layer and application layer. Finally, we discussed business process collaboration between enterprises.
The Green Design and Manufacturing Technology Based on the Recycling Theory
Authors: Yang Ji Rong
Published: August 2013

Green design and manufacture is a kind of sustainable development model in modern manufacture. This paper focuses on green design concept, application and selection of green materials and product manufacturing based on the recycling theory.
The Improvement and Finite Element Analysis of Large Crankshaft Forging Process
Authors: Wang Jian Jun , Hao Su Lan , Pan Lu , Zhang Yan Ming
Published: August 2013

In view of large load, the shape of large crank forgings and forging process are designed reasonably. Large crank forging process is simulated by numerical simulation software DEFORM-3D to improve the forging process and the dies, including adding upsetting step and related dies. The result shows that improved process and dies can obtain higher quality finish forgings and the load reduces to a rational level, which provides basis for crank forging process and die design.
An Experimental Study on the Effect of Die Chamfer Shape and V-Ring Position on Die Roll Height in the Fine Blanking of a Special Part with Various Corner Shapes
Authors: Kim Jong Deok
Published: August 2013

In this paper, a change of die roll height according to the die chamfer shape and V-ring distance of a fine blanking tool was studied by experiments on a special part with various corner shapes. Three guide plate inserts with different V-ring positions and three die inserts with different die chamfers were machined, and then a fine blanking tool was manufactured for the fine blanking experiments. Nine experiments were conducted on a 650-ton fine blanking press. Each die roll height was measured and analyzed. It would be noticed that the die roll heights on the corner shapes of the fine blanked parts increased with increasing V-ring distance and die chamfer angle, but it decreased with increasing corner radius and angle. The results in this study can be used to minimize the die roll height of fine blanked parts with corner shapes when designing the V-ring and die chamfer of a fine blanking tool.
Optimizing Maintenance Strategy of Multi-Stage Production System Based on Genetic Algorithm and Configuration
Authors: Xie Nan , Wiederhold Martin , Zheng Bei Rong , Xue Wei , Dittrich Peter
Published: August 2013

The optimized maintenance strategy of multi-stage production line is influenced by device processing ways, parts process plan and equipment deterioration process and other factors. Moreover, the production processes of parts exist constraint relationship. Based machining process plan of complex parts, the order relations of its operation processes is analyzed; the optimized multi-stage production line maintenance model is constructed with multiple objectives including production time, maintenance time, production cost and maintenance cost; the genetic algorithm is used to solve the model, and the Monte Carlo method is applied to carry out the simulation computation for fitness function of chromosome of genetic algorithm; the results give the maintenance threshold of each equipment of the line, their configurations and allocation of the various operation processes of parts at the same time. Finally, an example is presented to prove the effectiveness.
Development of Fast and Non-Destructive Disassembling Equipment for LCD Framework
Authors: Wang Yu Lin , Wang Qing Yang , Gao Meng Di , Liu Guang Fu
Published: August 2013

A lot of scrap LCD green recycling and resource issues have become one of the research hot spots. Whether recovering the internal resources or repairing the internal components, the framework of LCD must be disassembled at first. After analyzing the connections of the LCD framework, a kind of safe, efficient, fast and non-destructive dismantling equipment has been presented in the article. The equipment has the advantages such as non-destruction, good reusability, high degree of automation and quick-and-easy operation. The same model mass dismantling of the LCD frames can be fulfilled in this equipment efficiently.
A Study on Manufacturing of Stiffened Cylinder
Authors: Choi Ji Ung , Cho Woo Hyun , Yoon Jong Hoon , Yoo Joon Tae , Lee Ho Sung
Published: August 2013

It is known that the stiffened cylinder structure supports external pressure loads in aerospace and marine application subjected to hydrostatic pressure. For relatively low temperature, aluminum or composite cylinder can be appropriate, but at higher temperature, titanium or steel alloy must be considered. Nickel based alloys show excellent corrosion resistance and elevated temperature mechanical strength so that these alloys are now successfully utilized for aerospace and engine application. This paper provides innovative manufacturing process of producing stiffened cylinder for elevated temperature application.
Heat and Mass Transfer Measurements for Bio-Substrate Drying Processes
Authors: Jou Rong Yuan
Published: August 2013

The complex process of heat and mass transfer in bio-substrates during convection, vacuum, and thermohygrostat drying was studied. Changes in temperature and moisture content at the center of the wet material were measured before and after the experiment in order to calculate the drying rate (%/h). In the case of convection drying, the inverter frequency within the wind tunnel was set at 10, 20, and 30 Hz (velocities of 2.2, 4, and 6 m/s, respectively). Measurements were then made at 10 and 20 Hz, with temperatures at 50 and 60°C. In the case of vacuum drying, the chamber pressure was set at 0.4, 4.2, and 92 Torr. The thermohygrostat was set at 50°C with humidity levels at 30, 40, and 50%. In conclusion, thermohygrostat is more effective because of the controlled environment, and that drying rate is increased with lower wind velocities and chamber pressures for convection and vacuum drying respectively.
Analysis of Major Defects and Nondestructive Testing Methods for Solid Rocket Motor
Authors: Fan Jin Wei , Tan Fu Tao
Published: August 2013

The paper introduces the major defects and its causes of solid rocket motor,the harm and effects of the combustion chamber defects for the stability of motor were clarified,the main methods and their advantages and disadvantages of defect detection currently used in solid rocket motor are also cited and analyzed, and it points out the developing trends about various of detection technology used in conjunction.
Design of the Flexible Container for Control of Sloshing
Authors: Gradinscak Marija
Published: August 2013

The inherent flexibility of a liquid container is usually treated as a problem since achieving a perfectly rigid container is practical impossibility. On the other hand container flexibility may be used as design parameter in control of free surface oscillations. Intentional container flexibility has been employed in this research to suppress excessive levels of liquid sloshing. This paper outlines numerical predictions for simulation of liquid sloshing in a flexible container and its design alternatives while maintaining effective control.
Study on Test Method of Interior Noise Caused by Body Panels
Authors: He Hai , Zhou Hong , Li Xiang
Published: August 2013

This paper introduced four common test methods of acoustic contribution of body panels. The methods using PU sensor to array measure vibration velocity of body panels. Then, the vibration velocity of body panel multiplied by the area of panel to get the value of sound source intensity. Use reciprocity method to measure acoustic transfer function. In the experiment, the vector sum of the product of sound-source intensity and acoustic transfer function is used to compose the sound pressure contribution of the panels. The experiment proves that the composite value of acoustic pressure spectrum of drivers right ear coincide with the measured value. Therefore, this method is proved to be valid.
Design and Experimental Study of Swing Arm Vortex-Induced Vibration Generating Device
Authors: Ma Liang , Li Peng , Ma Yong , Ren Xuan Qi , Ge Hai Chao , Li Xu Hui
Published: August 2013

In order to expand the use of water flow, this paper presents a generating device using the vortex-induced vibration to gather energy from the low speed water flow. The device consists four parts: bearing frame, transmission and power generation system, vibration system and the measuring system. A prototype was made according to the design scheme, and finished the experimental test in a circulating water channel. The experiment showed that: the vibration body could get higher amplitude to drive the generator by controlling its stiffness coefficient; the unidirectional rotation transformed from the vortex-induced vibration reciprocating motion fluctuate obviously, which can be transferred into smooth rotation by the energy storage flywheel to drive the generator. The design and study of the swing arm vortex-induced vibration generating device provided a new idea for gathering energy from low-speed water flow, it would also provide a reference for the theoretical study and engineering applications of using vortex-induced vibration for generating.
Research on Voltage Disturbance Detection of PV System Based on Mathematical Morphological and Backward Difference
Authors: Yang Fan , Huang Li Ping
Published: August 2013

For the output of photovoltaic generation is of the characteristics of intermittent and uncertainties because of the changes of weather, the application of mathematical morphological and backward difference in voltage disturbance detection of the PV system. In order to overcome the defects caused by using fixed structural elements in general morphological filters, a form of adaptive weighted combination filter combined morphological open and closed operation is put forward. A more effective algorithm is designed by weight adding combination of morphological operation to get better effect. Three cases of examples such as voltage liter, voltage dips and voltage interruption are simulated through Matlab. The result shows the method can quickly and accurately extract the dynamic characteristics of power quality parameters of PV system.
A Calibration Method for the Logging Instrument Used in Harsh Environments
Authors: Huang Zhen , Kong Li , Zhang Pu , Liu Xiao Nan , Zhang Cheng
Published: August 2013

Due to the impact of harsh environments with temperatures higher than 150 °C, the characteristics of the amplifying circuits of logging instrument can be changed, to cause the large measurement error. Therefore, a new calibration method is proposed to obtain the gain value and offset for pre-amplifier system. This method use multiple calibration signals and based on the last square theory to complete the calibration work. At the experiment of calibration for the multi-parameter formation water logging instrument, the gain error for the pre-amplifier system by this calibration be improve to no exceed 0.15% to compare with over 1% by tradition method.
Topology Optimum Structural Design of the Pedestal in the Electro-Optical Theodolite
Authors: Wang Shou Yin , Tang Jie , Li Hong Guang
Published: August 2013

The pedestal of the theodolite is the main load-bearing part for the installation of the thrust bearings and torque motor stator, which is used to support the weight of the turntable and the pitching shaft system. So that the stiffness of it will have a direct impact on the ability of the theodolites capturing and tracking targets. In order to improve the overall theodolites tracking ability, to increase the stiffness of pedestal becomes more important. The 12 ribs were adopted topology optimization analysis by using the finite element software ANSYS. Through appropriately partitioning topology optimization elements and non-optimized elements, and setting optimization method, the structure of the model was optimized. The optimal ribs shape weve got under the condition of the largest stiffness pedestal structure, which reinforces the overall stiffness of the pedestal, and reduces the total weight.
Advances in Research of Dynamic Modeling of Joints with Harmonic Drives for Space Manipulators
Authors: Wei Nan Zhe , Sun Han Xu , Jia Qing Xuan , Ye Ping
Published: August 2013

Space robotic systems are expected to play an increasingly important role in future space activities. With continuous growth of demands of control precision and robustness, researches of complex dynamic characteristics for robot joints become the key problem for space manipulators design. In this paper, the main research achievements on dynamics modeling for joints with harmonic drives are reviewed, and future studies are recommended. Firstly, we summarize the application status of joints with harmonic drives in space robotic systems. Secondly, dynamic characteristics of joint in space environment are discussed. Then, the advances in joint modeling, including compliance, transmission friction and hysteresis, are introduced. Moreover, identification methods and relevant research works are reviewed. Finally, the future research trends are forecasted.
An Overview of Coal Mine Rescue Robot and its Navigation
Authors: Qin Yu Xin , Wang Yu Qing , Chen Xiao Jing , Li Zhi Guo
Published: August 2013

After the coal-mine accident, to get information of the coal-mine accident has become the key of disaster rescue and relief, and after disaster, the environment is very bad, the rescue-workers cant arrive at the scene of the accident to obtain information at the first time, so the coal-mine rescue robot was brought into being, it can reach the place where the person hard to go to implement the detection of information and rescue. This paper introduces the research status of coal-mine rescue robot. According to the different methods of navigation, this paper explained the research progress of the methods for robot navigation, and made a summary and prospect for its potential applications and future research work.
Structural Layout Design and Manufacture of a New Aerial Robot
Authors: Zheng Xiang Ming , Liu Xue Song
Published: August 2013

This paper describes an unconventional structural layout design of aerial robot. A double-layered # shaped configuration is proposed to meet the requirements of decoupling control of eight-rotor aerial robot. Based on the modular design concept, structure design for manufacturing is combined with aerodynamic analysis to improve the level of integration of design and manufacturing. Results of manufacture and flight test show that our design on aerial robot is effective.
Adaptive Control of Rubbing Rotor under Flow Induced Force
Authors: Yao De Chen , Jia Li Min , Qin Yong , Zhao Yun Yun
Published: August 2013

Along with the increasing of structural parameters of a rotary machine, the flow induced excitation on the rotor will significantly increase. By taking two-control-volume model for sealing force, the nonlinear dynamic equation of rubbing rotor foundation was derived. Then, the problem of controlling the chaotic response of the nonlinear rubbing rotor was studied by the adaptive control theory. Numerical simulations on the rotor system were performed with a multi-parameter adaptive algorithm. The numerical results show that the parametric adaptive control method is effective to suppress a chaotic response once happened into a required steady state periodic response. This control strategy is helpful to rotor system design and maintenance.
Simulation Research on Load-Imitating Test Equipment for Hydraulic Drive Unit of a Quadruped Robot Based on Feed-Forward Decoupling Control
Authors: Quan Ling Xiao , Tian De Zhi , Yu Bin
Published: August 2013

This paper establishes the simulation model of a load-imitating test equipment for a hydraulic drive unit of a quadruped bionic robot, analyzing load force changes during the work process of the hydraulic drive unit, and researching load-imitating characteristics. A Strategy based on feed-forward decoupling control is proposed to realize the decoupling between the position system and the force system of the load-imitating test equipment to improve load-imitating precision. The results show that control effect of feed-forward decoupling control is satisfactory, and this control strategy can effectively improve load-imitating precision of the test equipment. The research above can also provide theoretical foundation for test application of the hydraulic drive unit.
Research on Data Acquisition Method for Substation Automation
Authors: Liu Jing Zhong , Qiao Li Ping , Zheng Li Juan
Published: August 2013

According to the problems existing in the substation automation, this paper is study by data acquisition method of cycle distance transmission. First, Expounds the basic knowledge of CDT, including frame structure, information word, calibration method; Then, the design by hardware structure of the data acquisition system and the basic model; Finally, study by data acquisition control, including communicated methods and main attribute of MSComm control, CommEvent attribute, MSComm attribute to set, communication error setting. Using this paper of the research of design grid data acquisition software, can realize the data standardization management, improving work efficiency and economic benefit, meet the needs of enterprise modern managements.
Study on Application of Interval Type 2 Fuzzy Logic Control for Gap Width Controller Used in EDM Machine
Authors: Tee Kotler Ter Pey , Hosseinnezhad Reza , Brandt Milan , Mo John
Published: August 2013

This paper presents a new method for controlling the gap distance in an EDM machine. Existing gap width control method using PI controller does not perform efficiently in a highly nonlinear and time-variant process such as EDM. In this method, constant tuning of the PI controller is required to achieve a stable and efficient EDM process. The new gap control method present in this paper uses an artificial intelligent type 2 fuzzy logic control to control the gap distance between the electrode and the workpiece. The main advantage of this proposed method is its robustness that would rid the practitioners from the tedious tuning job and would provide the industry with better accuracy and confidence in the control performance.
Research on Typical Methods of S Surface Controller Parameter Self-Tuning for Underwater Vehicles
Authors: He Bin , Jiang Da Peng , Zhang Guo Cheng , Zhang Ying Hao
Published: August 2013

S surface control is a simple and operative motion control algorithm for underwater vehicles, but it has two parameters requiring to be adjusted manually. In order to enhance the adaptability of S surface controller, the research of S surface controller parameter self-tuning methods based on rules and models is carried out. Firstly, combined with fuzzy control, parameter self-tuning method based on fuzzy rules is presented. Then by means of predictive control theory, model-based parameter self-tuning method is proposed. By introducing the nonlinear autoregressive moving average model, the prediction model of underwater vehicles is established using parallel Elman neural network, and the optimal parameters of S surface controller is obtained by constructing quadratic performance index function. The results of simulation experiments show that the response speed of S surface controller with parameter self-tuning modules is improved, and the parameter self-tuning methods is demonstrated feasible and effective.
System and Design of Five-Axis Water Jet Incremental Sheet Metal Forming Machine Tool
Authors: Li Hao , Li Jiu Hua , He Kai , Du Ru Xu
Published: August 2013

High pressure water jet flexible incremental sheet metal forming (HPWJFISMF), which is a new kind of sheet mental dieless forming with good flexibility, is quite suitable for the production of multi-varieties and small batch products and trial-manufacture of new products. We have designed a five-axis forming machine tool with three translational degrees of freedom of workbench and two rotational degrees of freedom of the nozzle .in order to study the technology of HPWJFISMF. This paper gives a detailed introduction for the hardware structure and software system of machine tool of HPWJFISMF, which adopts an open control system with PC and motion controller. The control system of HPWJFISMF is designed on the platform of VC++6.0 in object-oriented way. The working performance stability of the machine tool has been verified by machining experiments, which offers a good platform for the study of high pressure water jet forming.
Residual Stress Analysis on Electrical Discharge Lapping (EDL) of Polycrystalline Diamond
Authors: Rahim Mohammad Zulafif , Ding Song Lin , Mo John
Published: August 2013

PCD is the combination of diamond particles that are sintered together under high temperature and high pressure conditions in the presence of catalytic metal. Due to its superior properties, this material has been widely used for cutting tool. However, magnitude and direction of residual stress obtained from the fabrication process believe to affect the tool performance during application. Furthermore, high temperature generated by the process might also contribute to the structure alteration that finally reduces the strength of PCD. This paper revealed that the residual stress due to EDL is more dominant in tensile direction which is vice versa to the conventional process. Analysis on the spectrum indicated that there is a relationship between the tensile stress value and the composition of graphite on the Raman laser spot location.
Thermodynamics of Calcium Phosphate Porous Scaffold on Beta Phase Tricalcium Phosphate Effects
Authors: Chang Chin Wei , Chen Ya Shun , Wei Wen Yen , Chen Wen Cheng
Published: August 2013

Sucrose evaporation technique was applied to prepare porous ceramic scaffolds with multiphasic calcium phosphates. Compositions with Ca/P molar ratios of 1.67 with MgO were synthesized and subjected to a thermal treatment of up to 1050 °C to 1400°C. The results show that various adjustable biphasic and multiphasic calcium phosphates can be prepared through vaporized filler amounts and controlled sintering temperature. The size of the pores in the final fabricated scaffolds with an interconnected network of pores ranged from several micro- to hundred micrometers of open pores. The phase amount of hydroxyapatite (HA) in the sintering process declined with elevated sintering temperature. The permeability of three-dimensional scaffolds used for tissue engineering was significant because it controlled the rate of cell migration and the diffusion of nutrients and waste products in and out of the scaffold.
Air Oxidation of Porous Cu-35wt.%Ni-(5,10,15) wt%Cr Alloys at 650°C
Authors: Chen Jian , Huang Zi Han , Ren Yan Jie , Wen Wen , Xiao Xiang Wu , Zhou Zhen
Published: August 2013

The oxidation behavior of porous Cu-Ni-Cr alloys containing approximately 5,10 and 15 wt.%Cr, but with a similar Ni content of 35 wt.%, was studied at 650°C in air. The results showed that the oxidation of alloys follows linear law at initial stage and then the parabolic rate law. Continuous external scales of CuO and Cu2O formed on the alloys. Some internal oxide of were observed. In addition, with increase of Cr content, the oxidation rate decreased slightly.
Analysis on Quality Evaluation Criteria for Spline Curves
Authors: Ji Shi Jun , Zhao Ji , Zhang Lei , Yu Hui Juan , Liu Xiao Long , Wang Xin
Published: August 2013

With the development of CAD/CAM, reverse engineering, geometric modeling, animation and computer graphics. In the past fifty years, many kinds of spline curve fitting methods have been produced. But, to authors knowledge, quality evaluation criterion about different spline curves are still not established and there is a lack of a comparing standard for analyzing different spline curves. Two spline curve fitting method comparing theorem is given and several various spline curves affecting factors are analyzed in this paper. Some comparable results are obtained by using the proposed quality evaluating theorem to different spline curves.
Elasticity Based Stress Analysis under Arbitrary Load using Fourier Series
Authors: Patil Lalit K. , Bhat Sunil
Published: August 2013

The paper presents a methodology to obtain the stress solution of a simply supported beam subjected to arbitrary load with the help of, elasticity based, Fourier series approach. The applied load spectrum is converted into Fourier series with constant, sine and cosine components for which the solutions are available. The individual solutions are superimposed to obtain the final result. Deviations are noticed on comparing the results with those obtained from the conventional strength of material approach.
Hard Template Synthesis of Mesoporous and Nanocrystalline Alkali Metal Niobates with Enhanced Photocatalytic Performance
Authors: Li Qing , Wang Li Ya , Li Xiu Kai
Published: August 2013

A nanocasting method using SBA-15 as a hard template was adopted to prepare mesoporous nanocrystalline ANbO3 (A = Li, Na, and K) samples. The characteristics of samples werecharacterized by techniques such asXRD, N2-sorption measurement, HRTEM and UVDRS. It was found that thealkality of the alkali metals could have profound impacts on the synthesis andthe physical properties of samples. The Li, Na, and K precursors can reacteasily with the siliceous template, and the reactivity varies with the alkalityof the alkali metal. The synthesis of KNbO3 is unsuccessful because of the high alkality ofK. The templated LiNbO3 andNaNbO3 consist of single crystalline nanoparticles that generate interparticle mesoporosity. The LiNbO3andNaNbO3 samples showed notably enhanced photocatalytic activitiesfor 2-propanol photodegradation in comparison to the counterparts prepared bythe solid state reaction.
The Finite Element Analysis of New Forged Coupler Knuckle
Authors: Wang Guang Xin , Bu Xiang Shun , Li Lin Jie , Zhu Li Li
Published: August 2013

As one of the most important load-bearing parts, coupler knuckle has a direct relationship with the safety in operation and reliability of the freight trains. A new forged coupler knuckle is made in order to meet the challenge to export ore train to Australia. Using the finite element technique, the stress characteristics of forged coupler knuckle under 1225kN load in tension and 1500kN compression load are evaluated. Simplify the load and boundary condition depend on the real working situation, the numerical simulation results coincide with experimental data.
Finite Element Analysis of the Roller Bearing Used in Rolling Mill
Authors: Wei Yan Gang , Liu Yan Kui
Published: August 2013

The loading roller number and maximum stress of the bearings can not be calculated accurately through conventional methods because support manner of the roller bearings used in rolling mill is different from that of the roller bearings used in conventional condition. Based on characteristic of the bearings, the model of the bearing is made combining contact mechanics with finite element method. The loading roller number and maximum stress of the bearings are calculated through FEA. The work of this paper offers a reference to design and manufacture this kind of bearings.
Topology Optimization for the Light Rail Vehicle Body Based on Sub-Structure Technology
Authors: Cao Jia Lian , Li Jun Yong , Wan Chao Yan
Published: August 2013

To complete the optimization of large-scale structure such as vehicle body efficiently, a new topology optimization method which combines with sub-structural analysis technology is proposed. With HyperWorks/Optistruct for a platform: first, the finite element model of the light rail vehicle body including sub-structure and non sub-structure is created; second, analyze the most dangerous condition using static reduction method which based on sub-structure technology, output the reduction matrix, generate the sub-structure; and then optimization model is defined including that design variables is the element density, objective function is the minimum volume fraction and constraint is the definition of stress, then enter the reduction matrix, and choose the non sub-structure area for topology optimization; Finally, based on the results, redesign the structure and get the improved one according to the technical requirements and practical experience.
Failure and Plasticity Conditions of Concrete in the Finite Element Analysis
Authors: Sucharda Oldrich , Brozovsky Jiri
Published: August 2013

The paper describes and compares selected failure and plasticity conditions of concrete. The CEB-FIB condition, the von Mises plasticity condition with modification for concrete and the Chen-Chen condition are studied. The conditions are compared in 2D and two of these conditions are also used for numerical analysis of a deep beam. The software BSA is chosen for the analysis in the paper. The software BSA is based on the finite element method.
Adjustable Speed Drives Response to Voltage Sags
Authors: Hardi Surya , Idris Muhd Hafizi , Rohana Ismail
Published: August 2013

This paper presents a study to investigate response of adjustable speed drives due to voltage sags. A small ASD of 0.39 kW, 50/60 Hz, and 400-480 V was used for testing how drives will respond to voltage sag types; A, B, C and D. The drive response is influenced by sag magnitude, sag duration and phase angle shift. Behavior of the diodes rectifier for conducting is influenced by sag magnitude and phase angle shift represented by sag of types C and D. The diodes rectifiers are reverse biased when it was supplied by voltage sags. Even though there are no charging currents to dc bus capacitor during voltage sags, the drives did not directly trip to certain sag magnitude and sag duration. Sensitivity of the ASD to voltage sag types is presented in voltage tolerance curve. Sag of type A produces highest sensitivity on the ASD and it trips for sag magnitude of 62.5% and 250 milliseconds in duration.
Investigation of Energy Deposition Technique for Drag Reduction at Hypersonic Speeds
Authors: Bibin John , Vinayak Kulkarni
Published: August 2013

Reduction in aerodynamic heating is the major design concern for hypersonic or hypervelocity vehicles which makes typical configurations blunt nosed for this flow regime. These blunt configurations make the space flight costlier due to higher wave drag. Therefore development and optimization of drag reduction techniques is the field of investigation and research in the area of hypersonic aerodynamics. The present work focuses on the investigation of concentrated energy addition technique for drag reduction. An in-house developed high precision compressible flow solver has been employed for the computational investigation of this technique. Parametric studies are carried out to investigate the effect of strength of energy source, location of energy addition and size of energy source.
Experimental Investigation of PCM Spheres in Thermal Energy Storage System
Authors: Amin N.A.M. , Mohamad Azizul , Majid M.S. Abdul , Afendi Mohd , Bruno Frank , Belusko Martin
Published: August 2013

This paper presents the experimental result of a small scale packed bed of random spheres with encapsulated PCM being charged and discharged. A vapor compression refrigerator and heated room with fan heater were used to supply constant heat transfer fluid at a minimum temperature of -28°C for charging and 16°C for discharging. Even though the temperature differences were not fixed in the experiments, the performance of the thermal energy storage is depicted in the form of effectiveness values. Different results were obtained for charging and discharging the thermal storage unit. The differences are expected to come from natural convection and super cooling. The super cooling during the charging process was as high as 6°C.
Online Surface Settlement Monitoring System of Ballastless Track with Difference Image Style
Authors: Min Yong Zhi , Dang Jian Wu , Zhang Zhen Hai
Published: August 2013

In order to achieve the online surface settlement monitoring of ballastless track,an online surface settlement monitoring system with difference image type has been established, of which the components, the preprocessing measures of images, the precise positioning methods of laser spot have also been researched. The device mainly contains a dot laser and a point-position measurement device that uses a CCD to detect the position change of the laser spot image. Any position change of the dot laser can be measured and the settlement for one point can be obtained remotely. The multi-point settlements can be obtained by using a series of such devices. Some methods such as automatic background sub-tractions and high-precision method for locating the centers of laser spots have been adopted to enhance the stability, adaptability and accuracy of the measurement system. The device has been used in some railway sites and it has the advantages of high accuracy, low-cost and easy installation.
Influence of the Gas Environment on the Transfered Film of the Tribologic Brass (CuZn)/XC48 Steel COUPLE
Authors: Amirat M. , Sawalem M. , Zaïdi H.
Published: August 2013

This paper reports on the influence of environment gas on the brass film and tribological behavior of brass (Cu64Zn36) / steel (AISI 1045) couple. The friction coefficient and the wear rate of brass/steel were measured in ambient air, in pure oxygen at 105 Pa and in vacuum at 5x10-5 Pa. In this study, the mechanism of transfer brass film on steel substrate has been studied with the scanning electronic microscope, the optical microscope and the interferential microscope. The analysis shows that the transfer films properties (roughness, hardness, thickness) depend on the atmospheric conditions. The brass film has an ellipsoidal surface in air and in oxygen with two differents thickness. However, in vacuum, the transfer film produced by a discontinuous adhered particles on the disc. The largest wear rate is obtained when using pur oxygen and the largest friction coefficient µ was measured in ambient air. The smallest friction coefficient and wear rate are obtained in vacuum. The results also showed that the granular film produced in vacuum has a good effect on tribological behavior of brass/steel couple.
Application of Mathematical Programming Method for Water Supply and Recycle Network in Titanium Pigment
Authors: Mi Xiao Juan , Xu Jing Cheng , Huang Ju Wen , Luo Lan , Liang Yong Li , Li Guang Ming
Published: August 2013

Water integration method is widely used in water minimization. Water minimization has great benefits to environmental and industrial sustainability. Both freshwater consumption and wastewater discharge can be minimized by practicing water system integration. Sulfate process (SP) is an important and mature method to produce titanium dioxide (TiO2) pigment. A large amount of water is consumed and a large quantity of effluent is discharged, which may cause water resource waste and serious environmental pollution. The paper presents Mathematical Optimization Method for water minimization of a titanium pigment plant event in China. The result of this study shows that mathematical optimization method has been effectively applied for the titanium pigment plant, and the freshwater consumption is reduced by 45.97 %.
The Designment and Implenment of Fuzzy Hybrid Pid in Srm Appleller to Electric Valve
Authors: Li Guo Qing , Zhao Dean , Jiang Hui
Published: August 2013

To solve the strong coupling and nonlinear of switched reluctance motor (SRM) used in the Electric valve ,we use a fuzzy compound PID control method, and apply it to the switched reluctance motors speed control system.The simulation applys that this method combines the advantages of fuzzy control and PID control and is well applied to non-linears object.Based on the theory, we design the core to the outer loops speed feedback and inner current loops feedback system in TMS320F28335,and describe the specific hardware and software structure, morely verify the feasibilitys test. The theory can solve the problem that the traditional PID cannot meet the variation of the parameter from the electric valve.
Design and Fuzzy Compensation Control for Reduction Cell Monitor Manipulator with Adaptive Law
Authors: Wang Wu
Published: August 2013

As Reduction Cell Monitor with Dangerous and Complicated Environment, also the Monitor Parameters was Various, so, the Technique of Reduction Cell Monitor with Manipulator was Proposed. Mathematical Models of Manipulator was Constructed, Fuzzy Compensation Control Strategy was Introduced into this Controlled Plant, with Adaptive Law Combined with Fuzzy Control. the Simulation Result Shows this Control Strategy was Suitable for Reduction Cell Monitor with Good Trajectory Tracking Ability, the Friction was Compensated and the Robust Control Feature Realized.
LOPN-Based BPR of Container Terminal Production Controlling System
Authors: Zhong Wei Zhu , Fu Xiao Qing , Wang Ya Ping
Published: August 2013

This paper presents a new redesigned solution on Container Terminal Production Controlling System, which goal is to correct defects existing and to rebuild business processes with lower cost, higher quality, flexible, faster and more intelligent responsiveness to whole system. The model of BPR is confirmed by the method of Logistic Object Petri Net.
The Construction of Electronic Laboratory Based on Combining Virtual Environment and Hardware Environment
Authors: Deng Xiao Peng , Xu Si Mao
Published: August 2013

By the analysis of the localizations existing in current electronic laboratory, the architecture of electronic laboratory based on combining virtual environment and hardware environment is proposed in order to overcome those localizations. The corresponding laboratory is built by using of Proteus software and our hardware environment. The result from application indicates that experiment teaching effect depended on this platform is improved obviously. Though using this platform, the students experimental interests and innovative abilities are cultivated.
Study on Real-Time Dynamic Effects in the Search Engine
Authors: Lin Jun Jie
Published: August 2013

This paper describes how to get real-time dynamic effects in the search engines and its principles, discusses the development and design of Box Computing, and key describes the application of regular expressions in Box Computing of the open platform. In the PHP + MYSQL development environment, through practical experience, shows the effect of the realization of this application.
A Study on Grid-Based Geography Visualization Environment
Authors: Chai Hong , Huo Jiu Yuan
Published: August 2013

Visualization is an efficient technology to display the information and the inherent properties of geographic data, mine the regularity and development trends between the data and give researchers the unexpected insight. As the using and distribution of visualization resources exists imbalance, in order to meet the need of Geography Science, this paper presented a Grid Computing-based High-performance Visualization Environment. This environment is based on the mature grid middleware, CGSP to achieve the Grid integration and sharing of the geo science visualization software. A demonstration application was discussed to verify the visualization environment. The environment would achieve the visualization of the massive geo-spatial data efficiently and expediently, enhance the collaborative research to solve problems and improve their research environment.
Research of Water Damage Resistance Performance of CAM in Low Temperature Condition
Authors: Li Jian , Chao Qu , Ping He
Published: August 2013

Under normal atmospheric pressure conditions, volume suddenly increases about 11% when the water freezes and decreased when the ice melts. The pressure can reach up to 2500 times of atmospheric pressure in the closed space when the water freezing. This is a very important characteristic of the natural world and the industrial. In low temperature condition, the snow on the pavement is easy to melt and freeze, and it will affect the road safety, increase the cracking of the road and accelerate asphalt pavement water damage. Bitumen is a mixture consisting of some extremely complex polymer hydrocarbons and hydrocarbon derivatives of non-metallic (oxygen, sulfur, nitrogen). Deicing salt is used to prevent freezing in that area, chloride salt is its main ingredient. When the water melting point reduced, it is not easy to icing but to penetrate the asphalt pavement. If the temperature is continued to reduce, salt solution will still freezing. At last, the pavement will form water damage in repeated freeze-thaw cycles conditions.
Analysis of Performance Decay Behavior for Asphalt Pavement Based on Aging
Authors: Li Pei Long , Ding Zhan , Zhang Zheng Qi
Published: August 2013

Aging is a main factor affecting the durability of asphalt pavement. To study decay behavior of asphalt pavement with aging, aged asphalt was extracted from stratified pavement mixtures for different service-life. The changes of asphalt properties with service time and depth variations of the pavement were discussed. And numerical simulation analysis of pavement structure was conducted with pavement gradient modulus changes caused by aging. The results indicate that asphalt stiffness increases and low-temperature performance decays sharply with the extension of pavement service life, especially in the first several years. The vertical aging differences from top to bottom of pavement were significant, the aging extents decrease continuously from the surface, which cause the gradient changes of pavement modulus. The maximum tensile stress and maximum shear stress all increase with surface modulus increasing, so more serious aging can induce greater gradient modulus, shear stress and tensile stress are larger under the same loads, which have more serious damage to the pavement structure.
Subgrade Dynamic Backcalculation Based on PFWD
Authors: Zha Xu Dong
Published: August 2013

In order to evaluate the bearing capacity and the compaction performance of subgrade in a reasonable way, according to the time history results of pressure and displacement tested with the PFWD (Portable Falling Weight Deflectometer), the extraction methods of time history data were put forward to use for the backcalculation. Combined with the analytic solutions of dynamic response of vertical displacement on the half-space surface under the impact loading of semi-sine wave in the circular rigid vertical distribution for the dynamic half-space theory, the mathematical models of subgrade dynamic backcalculation were established based on the least square criterion, then the corresponding backcalculation flow and method were proposed in accordance with the modified Gauss-Newton algorithm. Firstly the pressure time history was fitted as a semi-sine wave to obtain the two backcalculation parameters of impact load, i.e. the angular velocity and the nonresponsive period. Secondly the displacement time history was fitted to obtain the two subgrade dynamic parameters, i.e. the dynamic modulus and the dynamic density. Lastly, through comparing the dynamic backcalculation to the static backcalculation from the tested data, the results show that the dynamic modulus is substantially equal to the static modulus, and there are the well correlations between the dynamic density and the dry density and the moisture content measured with the sand replacement method. Therefore, the PFWD can simultaneously test the design index (modulus) and the construction index (compactness) for the subgrade to achieve the both unified evaluation.