bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Implementation of a Novel Photovoltaic Water Pumping System Using Energy Storage Technology
Authors: Wang Yi Wang
Published: June 2013

The solar photovoltaic water pumping system has the advantage of pollution-free, fuel consumption less and etc., promotion the application of photovoltaic water pumping can alleviate the arid and remote areas without electric mountain agriculture and living water shortage problems, then improve the people's living standards. But the traditional photovoltaic water pumps have not the energy storage function, the only apply in outdoor light or strong sunshine intensity conditions, these factors limit the application range and increase the cost. A novel photovoltaic pumping systems with energy storage technology was proposed and study in this paper, the system uses scalable energy storage technology, greatly expanded the application range of the pump, the photovoltaic energy storage controller and photovoltaic pump speed controller were development and implementation. Finally, the validity and effectiveness of the proposed system are verified by the experimental results.
Gas Response Properties of Noble Metal Modified TiO2 Gas Sensor
Authors: Zhang Mao Lin , Ning Tao , Yang Yu Hong
Published: June 2013

The response characteristics of noble metal (platinum and palladium) modified TiO2 gas sensors were investigated, respectively. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the sensing films. In addition, the resistance of sensors response to oxygen partial pressure was discussed by Kroger–Vink model. The response properties indicated that Pt modified TiO2 was providing excellent response properties when the sensor exposed to hydrogen and oxygen. The response mechanism was suggested to arise from the activation energy (E) of the modified sensing films.
Design of a New Type Low Heating Vapor Recovery Pump
Authors: Fu Su Hong , Zhang Dong Sheng , Zhang Wei Hua
Published: June 2013

In order to solve the problem of high-heating and motor burning for the vapor recovery pump, this paper designs a low heating pump with some radiating mechanical measures, which are improving the structure of the flame arrester, using PTFE diaphragm and adding the heat sink. The structure and the operating principle of the pump are given. All indicated that the flame arrester has a reasonable structure, can effectively improve the inlet and outlet exhaust efficiency. And by using PTFE diaphragm and the heat sink, the friction of the piston and the piston cavity is reduced and the heat dissipating efficiency is increased.
Design of Small Buoys
Authors: Wang Shi Ming , Cai Nan , Wang Xiang Chun , Zhang Weng
Published: June 2013

To meet the market needs, a small buoy is designed. First model building in software SOLIDWORKS, then force analysis of the model is made, finally emulation in software FLUENT. Basic parameters of the buoy are achieved at last.
Development of a Small Aquatic Cutting Machine
Authors: Zhang Li Zhen , Wang Xiang Chun , Li Jun , Kang Jian Liang
Published: June 2013

To solve the aquatic cutting problems in small waters, an aquatic cutting device which can be installed on existing small vessels was developed. The device is simple and practical. Its cutting depth is adjustable and it can be quickly disassembled or installed. After analysis of forces on foundation and simulation in software ADAMS, it shows that the device meets the design requirements.
Development of Metal Sheets Hydraulic Deep Drawing Tooling
Authors: Mao Xian Chang , Li Si
Published: June 2013

A simple and practical hydraulic deep drawing test tooling is developed to investigate metal sheets formability. It is composed of two parts including the forming die and hydraulic control system. Experiments with varied material and dimensional sheets of hydraulic deep drawing and mechanical deep drawing can be fulfilled by the tooling on a Single-Action Press without complicate external hydraulic system, blank holder system and oriented system for punch, respectively. The tooling is testified to be simply, facile and reliable, which can perfectly perform the sheets forming in hydraulic deep drawing, and the formability of sheets was improved effectively with hydraulic deep drawing.
Dynamic Responses Analysis of Vehicle and Track Based on Different Train Speed
Authors: Shi Hong Mei , Yu Zu Jun
Published: June 2013

With the rapid development of high-speed railway, dynamic interaction between vehicles and track is correspondingly strengthened. Therefore, dynamic responses analysis of the high-speed vehicles and track become more and more important to the train operation safety, riding comfort as well as the maintenance of railway infrastructure. In this paper, vehicle and track vibration equations are separately established based on the vehicle track vertical coupling model. Taking the CRH vehicle running on the existing line as an example, the random vibration responses of the vehicle and track under different running speed are analyzed in time domain through numerical integral method and MATLAB program. According to the results, the velocity of train has more influence on the vibration property of rail and wheelsets than bogie and carbody.
Dynamics Simulation Study of the Axial Piston Pump
Authors: Wei Xiu Ye , Wang Hai Yan
Published: June 2013

Kinematics analysis based on the structure parameters of SCY14-1B type axial piston pump is taken in this paper, and the motion laws of the pistons relative to the cylinder block and the swash plate are got. A matlab simulation of the motion law is taken and the comparison between theoretical analysis and simulated results is very good. We get the following conclusions: The displacement, velocity and acceleration of the motion of the piston relative to the swash plate is simple harmonic.The motion trajectory of the piston relative to the swash plate is an ellipse. The swash plate angle has a significant effect on the motion of the piston, which will inevitably affect the instantaneous flow rate of the pump and flow pulsation coefficient.
Finite Element Analysis for Pendulum Rod Support Based on ANSYS
Authors: Gao Lin , Dong Hong Juan
Published: June 2013

The force status of pendulum rod support in cooling bed carrying plate device is analyzed. According to the work characteristic of pendulum rod, pendulum rod support model is created by ANSYS software. And static and modal analysis is taken. The analysis results dedicate that the support has bigger comparatively safety coefficient and have some material waste. The improving design program is come up with in order to achieve optimization design.
Finite Element Analysis of Bioprosthetic Heart Valve on Suture Densities
Authors: Zhang Xia , Yuan Quan , Huang Xu , Ma Hai Bo
Published: June 2013

In order to improve long-term durability of bioprosthetic heart valve, stress distribution of bioprosthetic heart valve leaflets with different shapes and suture density under the same load is analyzed and compared based on finite element method.The finite element analysis results are compared with each valve model, it shows that suture density has a significant effect on the dynamic behavior of the bioprosthetic heart valve, which may lead not only to different stress peak values, but also to different stress distributions and deformation. This work can be very helpful when manufacturing the bioprosthetic heart valve.
Finite Element Analysis of the Roll Collar's Temperature Field of Universal Rolling Mill
Authors: Guo Xi Ping , An Xiao Yong , Zhou Shuang
Published: June 2013

Roll collar is one of the major consumption of spare parts in steel rolling production,it is excessive alternating thermal stress in the harsh working conditions. It is very important to control their size and variation of temperature. Temperature variation is unable to use experimental methods, but using the numerical solution is a proven method. The horizontal roller of Universal rolling mill is an exceptional tool for large. The research of temperature field of roll collar undoubtedly is of great significance to provide reasonable suggestions to rolling, extend the life of roll ring, and controll geometric accuracy and surface quality of the work piece.
Fracture of a Finite Medium with a Circular Internal Crack under Hyperbolic Heat Conduction-Prescribed Crack Face Thermal Flux
Authors: Wang B.
Published: June 2013

This paper studies the fracture mechanics of a thermoelastic medium with an internal circular crack subjecting to a prescribed thermal flux. The time varying crack tip thermal stress intensity factor is solved. Solution for the infinite medium under steady heat conduction is given in closed form. Comparisons between the non-Fourier results and the classical Fourier results are made. Numerical results show that the non-Fourier heat model predicts considerable high transient thermal stress intensity factor than the Fourier model. This paper, together with our previous paper entitled fracture of a finite medium with a circular internal crack under hyperbolic heat conduction-prescribed crack face temperature, completes the analysis of a finite medium with a circular internal crack under hyperbolic heat conduction.
Interfacial Reactions between Sn-Ag-Cu-Fe Composite Solder and Cu Substrate
Authors: Liu Xiao Ying , Huang Ming Liang , Zhao Ning
Published: June 2013

The growth kinetics and morphology of intermetallic compound (IMC) between Sn-3Ag-0.5Cu -xFe (x= 0, 0.5wt.%, 1wt.%) composite solders and Cu substrate were investigated in the present work. The Sn-Ag-Cu-Fe/Cu solder joint were prepared by reflowing for various durations at 250°C. During soldering process, Fe particles quickly deposited in the vicinity of IMC, resulting in the formation of Fe-rich area. It was shown that Fe could effectively retard the growth of interfacial Cu6Sn5 and Cu3Sn layers during liquid-state reaction and reduce the size of Cu6Sn5 grains. Small cracks were observed in the Cu6Sn5 grains of Sn-Ag-Cu/Cu interface after reflowing for 30 min while they were not found in the other composite solders.
Impact of Contact Wear on Bounce Time of ZNII Vacuum Capacitor Switch
Authors: Yin Ming , Li Jian
Published: June 2013

Bounce time is one of the important factors of the ZNII vacuum capacitor switch. Study on the effects of contact wear on the bounce time can guarantee the performance stability of bounce during long-term operation. Through the analysis of closing bounce dynamics and motion simulation by MATLAB, get the conclusion that with the increasing of contact wear bounce time increases. Therefore, considering the influence of contact wear to the bounce time is very necessary in the design process.
Modal Analysis and Lightweight Design of High-Power Marine Gearbox Based on Topology Optimization
Authors: Yuan Ming Hong , Tong Shui Guang , Cai Qin
Published: June 2013

Based on topology optimization, modal analysis and lightweight design of high-power marine gearbox case is studied. By the finite element analysis of original gearbox case, the structure strength has greater redundancy. After determining the design space and working load, after determining the design space and working load, the case thinning and local strength enhanced program based on SIMP method has determined. By considering the rationality and security of design and manufacture, both the static and dynamic performances of the optimized case is greatly improved, with a 16.36% reduction in maximum stress, a 13.86% reduction in maximum displacement, and successfully saving material 5.87%.
Modeling and Modal Analysis of the Whole Structure of PT7032 Tower Crane Based on Finite Element Method
Authors: Lei Jing Fa , Chen Xue Hui , Huang Lei , Lei Sheng , Chen Cong Sheng , Shen Lei
Published: June 2013

In this thesis, PT7032 tower crane was taken as the research object, and the modeling and modal analysis of the overall structure were carried out using Abaqus software. The low-order natural frequencies and main vibration modes of this tower crane were obtained based on the above modal analysis. The analysis results will prevent the tower crane from working on resonant region, and will make preparations for the following dynamics response analysis of the tower crane.
Natural Vibration Analysis of High-Speed Railway Slab Tracks under Rail Longitudinal Force
Authors: Guo Yi Shi , Yu Zu Jun , Shi Hong Mei
Published: June 2013

The slab track is the main structure of the high-speed railway track, the Inherent dynamic characteristics of which is of great significance to the research on the Vehicle-Track Coupling Dynamics. The assumptions of the modal function describing the natural vibration of the track is a necessary theoretical basis in analytic and numerical calculations for dynamics problems, which is more in accordance with the real situation, the more likely characteristic estimation are to be accurate. In this paper, with the method of combine matrix, the system characteristic equation of slab-track model is deduced, and the exact analytic formulas of frequency equation and modal function are obtained. Meanwhile the specific effects of the Rail longitudinal force on the vibration performance of the tracks are analyzed through instances. The results show that this approach is an effective analytic method, the solution of which is accurate. And the track parameters can be flexibly initialized, which is especially applicable for the condition of track parameters varying and longitudinal strain with distribution.
Numerical Study for a Bilayer Functionally Graded Cantilever Beam
Authors: Zhang Kai , Yang Qing , Zheng Bai Lin , Li Juan
Published: June 2013

A finite element analysis for a bilayer functionally graded cantilever beam is developed. The elastic modulus of each graded layer of the beam varies with the thickness as an arbitrary function respectively. The graded function of modulus can be dealt with easily by using MSC.Marc analysis code, which can increase the efficiency of calculation. By comparing finite element method (FEM) results with theory results, it can be found that the 8 node 2nd order element is more precise than the 4 node linear element, due to the former could eliminate the shear locking phenomenon effectively. Comparing to the method of equivalent coincident nodes, the forced displacement coupling on the perfect bonded interface is more appropriate. Finally, it is also shown that the results of finite element analysis are more rational than the theory results around the ends of the beam.
Optimization Design of Precast Casing Pipe Unit
Authors: Dong Jun , Gao Hong Ping , Qiao Xin Chao , Dong Jian Guang
Published: June 2013

The level of the mould design directly influence the quality of track slab , influence the smoothness and stability of the a high-speed railway further .Precast casing pipe unit is one of the key parts in the mould, which definitely influence the quality of track slab. Combined with the track slab manufacturing in Nanjing-Anqing special line, we have discussed five schemes on precast casing pipe unit of the mould, and the best scheme been formed after comparison and optimization. It is proved by the process of the track slab production that the best scheme can ensure precision of track slab, be operationally convenient, bring obvious benefit and is worth spreading.
Parameters Calibration for Medium Hydraulic Excavator Simulation Model Based on Experimental Data
Authors: Wang An Lin , Shi Shi Ning , Huang Jun
Published: June 2013

The authenticity and reasonability of the medium hydraulic excavator simulation model parameters was the foundation to ensure the effectiveness of the simulation model. Based on the bond graph theory, a dynamic simulation model of a medium excavator was established. By the comparison of experimental data and simulation data, the response surface of unknown parameters and the error function of the system model were built. Subsequently, the genetic algorithm was employed to optimize the response surface and obtained optimal value. And then the calibration of the unknown parameters was automatically completed. It was proved that the model simulation curve and with experimental curve fitted better when response surface-genetic algorithm method was used for automatic optimization and calibration of unknown parameters. Furthermore, this method could also function to reduce effectively the number of trials of parameter calibration.
Profile Design of the Helical Groove Milling Tool
Authors: Chen Ji Ping , Yang Rui Jun
Published: June 2013

In the process of milling special helicoid , there is a cusp point between its profile curve and linear esicoaginal junction . Ordinary milling cutter can't processing .If milling tool profiles are calculated and designed by smooth connection, the findings of milling tool profiles will appear profiles jagged or profiles detached phenomena. For separation of milling cutter blade shape, in order to prevent point was cut off, it can be treated with the method of open groove, but the two point easy to wear and affect the durability of the cutting tool. Solving method of transitional profiles of detached section is given.
Catalytic Activity of Tetranitro-Copper Phthalocyanine Supported on Carbon Nanotubes towards Oxygen Reduction Reaction
Authors: Chen Feng Ying , Li Ke-zhi , Li He Jun
Published: June 2013

Acid-functionalized multiwalled carbon nanotube (AF-MWCNT)-supported tetranitro-copper phthalocyanine (TNCuPc) assemblies were prepared by solid phase synthesis method. The products were characterized by infrared spectroscopy, scanning electron microscopy and XRD. The electrocatalytic activity of the obtained AF-MWCNT-supported TNCuPc assemblies was measured by cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques in an oxygen-saturated 0.1 M KOH. The results showed that the catalytic activity of TNCuPc/AF-MWCNTs towards oxygen reduction was a two-step, two-electron process for oxygen reduction.
Reliability Optimization Design of Planetary Gear Reducer
Authors: Jiao Wan Ming , Ma Fei , Zhao Xin Xin
Published: June 2013

The transmission of planetary gears has the nature of great efficiency, calmness and vibration resistance. It is often used in reducers. In the traditional design charts in handbooks and formulas in dynamics are use to get gears parameters. This ways spend long time and great work, but the result is not so reliable. In the modern design the Reliability Method and Optimization device are introduced by means of computers, and look for the best parameters on the base of the maximum reliability.
Multiscale Parameter Identification Method for Three Dimension Steady Heat Transfer Model of Composite Materials
Authors: Liu Tang Wei , Xu He Hua , Qiu Xue Lin , Shi Xiao Bin
Published: June 2013

In this paper, for heat conductivity identification of three dimension steady heat transfer model of composite materials, a new hybrid Tikhonov regularization mixed multiscale finite-element method is present. First the mathematical models of the forward and the coefficient inverse problems are discussed. Then the forward model is solved by mixed multiscale FEM which utilizes the effects of fine-scale heterogeneities through basis functions formulation computed from local heat transfer problems. At last the numerical approximation of inverse coefficient problem is obtained by Tikhonov regularization method.
Research on Optimization Design of Folding Tables and Chairs Group Based on ADAMS
Authors: Luo Si Ming , Wu Lin , Zhu Fu Gui
Published: June 2013

To design a new type of folding tables and chairs group based on the planar linkage mechanism by using a 3D modeling software solidworks and a dynamics analyzing software ADAMS, it is built on four bar mechanism .First ,establish a 3D model of folding tables and chairs group ;Second, simplify the parts of folding; Last but not the least, use the ADAMS to accomplish the optimization design of the group according to the movement characteristics analysis of the corresponding folding parts in the process of expansion and pack up.
Research on the Structure Strength and Vibration Mode of Transformer
Authors: Chen Dou , Li Xiang Sheng
Published: June 2013

To check the reliability of transformer’s strength and vibration mode, we analyze the structure of the transformer, definition the Load condition , process the boundary condition and Create the finite element model . we use ANSYS software to analyze transformer s structure strength and mode, which provides important support to reliable design. From the analysis of above, the structure design and the stiffness of transformer is totally meeting with the requirement of design.
Stiffness Characteristics of a Rotor Shaft with Slant Crack Including Elliptical Front Edge
Authors: Gao Jie , Zhao La Sheng , Zhang Qiang , Wei Xiao Peng
Published: June 2013

The stiffness characteristics of a rotating cracked shaft including elliptical front edge between transverse crack and 45° slant crack have been studied here. The strain energy release rate (SERR) method has been used to calculate the stiffness matrix of two types of the crack element. Time-varying characteristics of stiffness of the straight front edge and elliptical front edge of the cracked shaft were studied in a stable rotation cycle. The analytical result of this paper shows that change of the cracked shaft stiffness raises during the increase of the crack depth. The stiffness characteristics of the rotor with slant crack having elliptical front edge vary differently from those of the rotor with transverse crack having elliptical front edge.
The Control Method and Application on Weld Mark Optimization of Complex Injection Parts
Authors: Wang Xi Kui , Mei Yi , Wang Xi Chang , Yang Li Quan
Published: June 2013

In order to try to reduce the influence of weld mark on the appearance quality and mechanical properties of plastic products, with the combination of injection molding simulation software and the orthogonal test design, reasonable test analysis programs was designed. Products weld mark depth was the evaluation index, and get the optimal parameter combination which could control the quality of the weld, then the results was verified by molding simulation. The results show that through the optimization of process parameters combination, the weld quality was improved and the negative impact on plastic parts was reduced.
The Design of the 3D Model to Create Injection Mold Cavity Based on Pro/E
Authors: Zhou Chun Ying
Published: June 2013

By utilizing Part Design to draw the 3D feature model of a plastic mould, some different ideas and methods can be used. If the features of the later Design Part are considered in term of 3D model design, it can largely shorten the period of mould design and improved the work efficiency. In this paper, the 3D model designing for the injection mould cavity was researched by Pro/E .
The Improvement of the Spin Coater and its Patented Project Design
Authors: Li Nai Gen , Liu Ke Gao , Xu Yong
Published: June 2013

A rotary spin-coating technology project is provided by the utility model patent in this work. It includes vacuum pump and chassis, speed display, power switch, suction piece switch, start switch and the speed control switch on the chassis panel, motor and speed controller in the chassis connected to the outside of the chassis bracket, the bracket beams fixed hanging umbrella cover, the ring hood under the umbrella cover on top of the face, the piece prop and tachometer probe in the ring hood, the chip tray fixed extended chassis top surface motor shaft, there is a solution injection tube on the top of the sheet tray in project; it has an annular heater chip at the bottom of the tray within the annular cover sheet around the motor shaft; In addition, there is an ultrasonic humidification pump, the pump output of the ultrasonic humidification communicating through the humidifying tubes with the annular cover. In above mentioned the annular cover connected to the exhaust pipe and the annular cover interior chamber. A temperature sensor is at the inside of the annular cover, and a temperature display panel on the panel of the chassis.
The Study and Application of Comprehensive Evaluation of Regional Power Grid Power Quality
Authors: Ouyang Sen , Zhang Xiao Yu , Hou Yu Shan , Huang Rui Yi
Published: June 2013

This paper puts forward a comprehensive evaluation method of regional power grid power quality, and introduces its application with real measurement data. Firstly, the conception of regional power grid power quality evaluation is proposed. And a power quality indexes system, which contained the comprehensive power quality indexes, is designed on the basis of six national standards. Secondly, the evaluation objects are divided into two levels, then the comprehensive evaluation of regional power grid power quality is achieved with weighting the subsystems and large-scale systems by scatter degree method and improved analytic hierarchy process-G1 method. Finally, according to the data presented by power quality online surveillance system of Guangzhou power supply bureau, the suitability and validity is proved by the method of area pigmentation.
The Mechanical Excavator - Hydraulic System of the Establishment of Co-Simulation and Optimization
Authors: Sun Wei , Zhu Shi Sha
Published: June 2013

By using UG and ADAMS software, the mechanical system and hydraulic system model of excavator working device are established. Moreover, together with the application of the parameters of the ADAMS associated technology, the virtual prototyping model of mechanical excavator and hydraulic integration are established; These two software also work on the motion simulation, as well as the optimization analysis of the main components of the system. This parameter association technology research method is characterized by a comprehensive analysis both of the dynamic and static situations. The results provide some reference value for the feasibility of the design and the manufacture of the virtual samples. Meanwhile, it provides some theoretical and engineering significance.
Topological Optimization Design of the Vertical Machining Center Workbench Based on ANSYS
Authors: Li Hui
Published: June 2013

The vertical machining center workbench solid modal had been built through Pro/E , the static stiffness analysis had been computed by using the finite element software ANSYS, and the workbench static stiffness had been checked according to the calculated result. To lose weight as optimal objective,by using the topological optimization function of ANSYS software, and take into account the stress condition and manufacturing process, the structure of the workbench was improved, the static stiffness was the same as original design. Comparing with the original design, the weight of the optimized structure was reduced by 12%.
Optimization Decomposition Cast Structure in M35 High-Speed Steel
Authors: Han Peng Biao , Zhang Jian , Wu Li Zhi , You Xiao Dong
Published: June 2013

The effects of the different heat-treatments on the eutectic carbides in HSS cast strip are studied. The microstructure of the high speed steel(HSS) is analysized by means of optical microscopy and SEM. The results show that the heat treatment can make M2C and M6C metastable phase decompose. After comparison we can find that the optimized heat treatment processing of HSS cast strip is at 1200°Cfor 6 h, under which the fine and uniform carbides can be obtained.
Vibration Control in Turning Machining
Authors: Chen Long Bo , Guo Ji Lin , Zhou Tian Rui , Jiang Tao
Published: June 2013

Vibration in turning processing is associated with free vibration, forced vibration and self-excited vibration, the composition and machine tool, tool and workpiece process system dynamic characteristic.A detailed analysis of the main types of vibration in turning and the causes, and put forward from the aspects of cutting tool, fixture, cutting process, reduce or eliminate vibration measures.
Virtual Prototype Based Fatigue Life Research on some Missile Erecting System
Authors: Hu Chang Lin , Ma Li Yuan , Li Hui , Li Yong Jun
Published: June 2013

With some ballistic missile erecting system as subject, a virtual prototype is constructed, for virtual measuring of the load spectrum of the erecting system. By FEM analysis and damage analysis, the dangerous position of is uncovered, and the stress-time history is obtained. By use of material fatigue feature curve in combination with the stress-time history, the fatigue life of system components is studied.
P Wave Propagation in the Functionally Graded Materials
Authors: Zhang Li Gang , Zhu Hong , Xie Hong Biao , Yuan Lin
Published: June 2013

The P wave propagation in the functionally graded materials (FGM) is studied. The differential equation with varied-coefficient of wave motion in the FGM is established. By using of the WKBJ approximation method, the differential equation with varied-coefficient is solved, and the closed-analytical solutions of displacement in the FGM are obtained. The properties of the FGM whose shear modulus and mass density are gradually varying in exponential form are calculated; the curves of P wave velocity and amplitude, and the general properties of the P wave in the FGM are analyzed.
Research on the Break Impact Test of Ultra High Voltage Composite Strain Insulator String
Authors: Liu Cao Lan , Liu Bin , Liu Sheng Chun , Liu Zhen , Zhu Kuan Jun
Published: June 2013

To guarantee the security of composite insulators as tension strings applied to ultra-high voltage engineering, it is necessary to study the mechanical properties of composite insulator regarding break impact. The test system was designed and the implementation plan was developed. Test was done to two insulator strings broken and the dynamic impact factor under different broken conditions at different tension was obtained accordingly, which provides reference and evidence for further study on mechanical properties of composite insulator and development of applicable design specifications.
A Contactless Sensing Analysis of a CUP Wafer
Authors: Chen Shen Li , Cheng Yang Shiung
Published: June 2013

The detected structures in a CUP wafer by sensing (leakage) analysis are presented in this paper. The pad structures are designed by the ADS2009 & TSMC 0.18um CMOS processes design rules, and use some electrostatic discharge (ESD) protection devices and circuits under these pads. Furthermore, the signal will be passed through these ESD devices or circuits on the top-metal pad as a sinusoidal, square, or ESD pulse waveform being injected. It is found that during an ESD occurred situation, a strong signal coupling can be sensed by the ESD protection circuits.
An Electronic Model of Capacitor Charging Power Supply Considering Transient Switching Interference
Authors: Han Xiao , Gao Ying Hui , Sun Yao Hong , Yan Ping
Published: June 2013

In this paper, a mathematical analysis of the EMI(Electromagnetic Interference) for a 20kHz/10kV capacitor charging power supply in frequency-domain is presented, and a related circuit model considering the transient switching interference is proposed. Due to the high working frequency and the device-switching transitions, the conducted EMI caused by the charging circuit which includes the harmonics of grid frequency, working frequency and device-switching transition frequencies. Thus under certain working situations or loads parallel power supply, the interference may cause charging failure. To solve this problem, a high frequency transformer modeled with stray capacitances and an approximation of the device-switching transition is applied in the Pspice-based simulation model, and a mathematical analysis in frequency-domain is presented.
Application of Gray Elman Neural Network to Predict the Gas Emission Amount
Authors: Zhang Jing Gang
Published: June 2013

The prediction of mine Gas Emission Amount is an important part of helping to make rational gas control measures. In order to improve the accuracy of mine gas emission prediction, this paper introduced the grey theory into the Elman artificial neural network theory, and combined the gray prediction model GM (1,1) with the Elman neural network model,established a gray Elman artificial neural network prediction model of gas emission, and carried on the simulation through software Matlab. Practice and experiment showed that this method compared well, and is superior to the traditional Grey prediction model, moreover this method also applied to the situation of original data was few or the historical data had transition. The forecasting results from this method can be more reliable and accurate, so it can instruct the practice accurately
Applications of DC Transformer in DC Distributed Generations System
Authors: Zhang Xian Jin , Wang Bu Gen
Published: June 2013

DC transformer with high frequency and efficiency under a fixed duty cycle is widely used in dc distributed generations. In this paper, the topologies and equivalent circuits of single /bidirectional full-bridge non-resonant DC transformers are presented. And the configurations of the input-series output-parallel and input-parallel output-series DC transformers are also proposed for reducing voltage stress of power devices. The example consisting of DC transformers in a distributed generation system based on DC grid is shown. Finally, simulation results verify the feasibility.
Bearing Fault Diagnosis Based on Wavelet Analysis
Authors: Li Hai Xia
Published: June 2013

The de-noising principle using wavelet was discussed and the de-noising property was compared with that of using general threshold strategy. The steps of the per-level de-noising method were then given and the experimental study with a vibration model was carried out. The results prove that the method is advantageous to de-noising, which is more suitable to recover the interest mutations signal buried in intensive background noise. The application of the method in the bearing vibration was presented and the results show that it can inhibit the background noise effectively and recover the interest information satisfactorily.
Combined Improved EEMD with SVM in the Application of Intellgent Fault Diagnosis
Authors: Zhang Mei Jun , Chen Hao , Huang Jie , Chai Kai
Published: June 2013

Intelligent diagnosis is the development direction of mechahnical condition monitoring and fault diagnosis.Conbined improved EEMD with SVM in fault intelligent diagnosis is researched in this paper.To bearing normal and fault as an example,impove EEMD decomposed 9D normalized energy for characteristic vector applied to the binary classification and identification.Compared to the SVM classification accuracy using different kernel functions that is linear,polynomial,RBF and Sigmoid kernel function.In the same parameters,SVM classification accuracy based on linear and polynomial kernel function is a hundred percent.Bearing normal and fault two kinds of state is completely correct apart. And the normal and fault state of the binary classification and identification using RBF and Sigmoid kernel function appeared wtong points.
Design and Analysis of Bicycle Helmet with Impaxx Foam Liner
Authors: Teng Tso Liang , Liang Cho Chung , Shih Chien Jong , Nguyen Van Hai
Published: June 2013

Currently, expended polystyrene (EPS) are widely used as liner material in bicycle helmet. Due to its characteristics is excellent performance, lightweight, low cost of manufacturing. However, EPS has some disadvantage as difficulty to optimize energy absorbing in different areas of head and inferior effect of heat dissipation and a brittle characteristic. This study focuses on to find a replacement material for EPS foam to improve liner of bicycle helmet. Impaxx energy absorbing (EA) foams present strong potential in overcoming such problems of EPS foam. To make certain that all bicycle helmets reach efficiency, the helmets are required to pass shock absorption test of EN1078 standard. This study performs finite element analyses of helmet impact tests using LS-DYNA software. Simulation results indicate Impaxx foams are suitable for shock absorption test according to the EN1078 standard. Therefore these results encouraged the authors to extend the manufacturing work to cover the creating helmet design and performance experimental tests.
Research on HOV Space Motion Mathematical Model
Authors: Liu Feng , Han Duan Feng
Published: June 2013

Human Occupied Vehicle（HOV） is a typical system which is characterized by high nonlinearities,couplings,uncertainties and multi-stance 3D movement.It requires quite exact description and dynamic simulation research .In general,it is difficult to get precise dynamic model. this paper regards a certain HOV as research object, based on the HOV six degrees of freedom equations motion, simplified the present mathematical model of HOV space maneuvering motion , developed HOV motion simulation program by Matlab software,simulation were taken by choosing several typical motion states,the simulation results show that the HOV space motion mathematical model can reflect the HOV motion characteristics,also provide important basis for the design of HOV motion control system.
Research on Nonlinear Numerical Simulation Method of Icing Conductor on Galloping
Authors: Zhan Xue Ping , Zhu Kuan Jun , Liu Bin , Liu Ya Duo , Li Xin Min
Published: June 2013

In this paper,the models of the conductors are constructed by finite element method with a three-node, isoparametric cable element. Two numerical simulation methods that include the 4th order Runge-Kutta (referred to as R-K) method and improved time integration method on galloping are studied, and the numerical results on galloping are given by using those two methods by programming. The study result shows that dynamic responses simulated on galloping by using 4th order R-K method and improved time integration method are in good agreement in this paper, but the efficiency of improved time integration method is higher. Result of this paper can provide beneficial reference for galloping simulation calculation.
Oxidition Resistance of Multi-Arc Ion Plating TiN Films
Authors: Wang Jie , Jiang Shi Hang , Wang Juan Juan
Published: June 2013

Depositing TiN Film on the surface of 4Cr5MoSiV1 with multi-arc ion plating technology method. And 350°C, 450°C, 550°C and 650 °C short oxidation test and 550 °C cyclic oxidation test. By scanning electron microscopy (SEM) and electron spectrometry (EDS) to analysis micro-structure and phase structure of test samples, study TiN film on oxidation resistance, and utilize indentation method to measure mechanical properties. Results show: In a short time under oxidizing conditions, at 550 °C the TiN film still has a good oxidation resistance. The film still have a sufficient bonding strength below 600 °C.
Research on Predictive Model of Gas Concentration for Driving Ventilation in Coal Mine Based on RBF and BP
Authors: Gong Xiao Yan , Guo Jun , Xue He , Yan Dong Hui , Wu Zhe
Published: June 2013

In order to predict accurately gas concentration and design ventilation scheme in driving ventilation process under different gas emission in coal mine, based on the analysis of various ventilation factors, the prediction model structure of gas concentration for driving ventilation was designed based on RBF and BP neural network in this paper. Then MATLAB software and the observation data obtained from the coal mine sites were used to compare and analyze the prediction errors of two models, and a RBF neural network model with higher prediction precision was obtained. After that, the prediction model was used for practical application research on the gas concentration of the heading face in concrete coal mines. The research shows that the settled prediction model can not only predict the gas concentration precisely of driving ventilation, but also provide a certain theory basis for different driving ventilation equipment layout and parameters configuration in the driving ventilation process of coal mines.
Study the Propeller Blade Impact on Powder Mixture
Authors: Huang Lei , Lei Jing Fa , Chen Cong Sheng , Chen Xue Hui , Yuan Gen Fu
Published: June 2013

Powder particles in the mixer is used DEM analysis method to study and analyze the movement, it show up certain difference with different blade structure, and the paper points out that blade structure has apparent effect on the powder mixture in the mixer.
Study and Practice of Time-Temperature-Transformation (TTT) Curve Digitization
Authors: Fan Xiao Hong , Xu Bin , Li Jing , Xu Yong , Lei Shi , Wang Fu Ming , Lin Jun Pin
Published: June 2013

Several methods were introduced for practicing and studying the method of TTT curve digitization by using Plot Digitizer (version 1.9) and OriginPro (version 8.0724). After digitizing, original TTT images, which can not be inquired in computer procedures, were transformed into the data series and digital patterns, providing a convenient way for inquiring the data points from TTT curves. It offers a handy tool for studying the relationship among the time, temperature and transformation. Furthermore, it provides a convenient method for thermal treatment teaching through courseware. It is believe that, after a systemic data processing, we can obtain a digitizing TTT data base, which can be inquired automatically by PC procedures, promoting the automatic level of the thermal treatment for industrial applications.
An ASP Based Approach of Inter-Domain Role Mapping
Authors: Zhang Wei , Lin Zuo Quan
Published: June 2013

Although the ANSI RBAC model has achieved great success in the enterprise, it provides no mechanism for the urgent interoperation needs between distributed domains. This paper presents an ASP based approach to extend traditional RBAC model for inter-domain cooperation. We first translate the RBAC models with the IDRM problem into answer set programs, and then compute the solutions via an answer set solver. Finally, we discuss the safety and availability of our approach and ensure the models conflict-free. It is concluded that our approach supports the collaborating environments well with flexible and efficient reasoning abilities.
A New Algorithm of Design of Fixturing Scheme Based on RBR and CBR
Authors: Wu Tie Jun , Li Long Gen , Cao Hui Yuan
Published: June 2013

Fixture is technological equipment which is able to determine the location of the workpiece accurately and clamp the workpiece steadily. A good fixturing scheme could help improve the quality of products. A new design algorithm of fixturing scheme based on RBR and CBR is developed. The appropriate parts feature information model is decided based on requirements of design of fixturing scheme. The rules of constraint of DOFs and the rules of fuzzy inference are used to determine the correctness of the scheme location of the workpiece according to requirements of machining dimensions and the geometry information. In the case library, some appropriate fixturing schemes are retrieved according to constraint DOFs. Their entire similarities of these appropriate fixturing schemes are figured out and ranked from high to low. The fixturing scheme with the highest similarity is modified and stored into the case library. This entire method makes the best of advantages of RBR and CBR to achieve automation of fixturing scheme. It could help the automation of CAFD. This method has higher practical value.
Button Cell Characterization Testing Technology Research Based on Computer Vision
Authors: Sun Ling Yu , Sun Li Xin , Peng Ping , Li Hui , Zhang Xiao Jun
Published: June 2013

The use of computer vision to detect and recognize target objects in the industrial field has high academic value. In this paper, computer vision is used to identify cell’s label and detect the surface scratch. Using inter variance threshold method of image acquisition threshold processing, to obtain a better image binarization , subsequent using characterization information to establish a template, and the template using mathematical morphology operations. Object matching is achieved by matrix change of the template , in order to achieve the detection. The experiments show that this method has higher accuracy and better real-time, so online detection can be used for battery characterization.
Performance of Self-Lubricant Bearing from Composite Material and its Application Practice in Textiles
Authors: Wang Xian Fang , Song Yong Sheng
Published: June 2013

Self-lubricant roller bearing from composite material of caprolactam, carbon fiber, and graphite was made. And its molding process was discussed. Its friction and deformation performance was studied. Moreover, different varieties of yarns were spun in the spinning machine for contrast tests. The results show that: The yarn from the machine with this bearing has better quality and without any oil-polluted yarn. And oil cost is only 0.05% of a ordinary oil bearing. As well as its labor is reduced. Thus it can bring greater economic value for enterprises.
Research and Application of Equipment Fault Diagnosis Based on Cloud Computing
Authors: Li Guang Lei , Sun Shu Min , Mao Qing Bo
Published: June 2013

Research on remote fault diagnosis of wind power has great significance of protecting grid security and secure operation of wind farm This paper presents the remote fault diagnosis system of wind power based on cloud computing and thoroughly analyzes construction demands and functional structure. Experimental results show that this system can effectively analyze mass monitored data and accurately assess equipment failure. This provides a new idea for cloud computing applied to wind farm fault diagnosis.
Software Maintainability Modeling Based on Probability at Design Level
Authors: Liu Li , Zhu Xiao Dong , Ye Fei , Wang Yi Gang
Published: June 2013

Change impact analysis is very important to the object-oriented software development and maintenance. Aiming at the problem of change prediction at design level, dependency relationship among classes is analyzed firstly, and the relation of correlative class is described by conditioned probability. Then the prediction of software maintainability method base on probability is proposed. The proposed method can compare software maintainability of different design projects. Lastly, the feasibility and practicability of this method has been proved through one case.
Study of Speaker Recognition Based on Multiclass Core Vector Machine
Authors: Wang Jian , Zhang Yuan Yuan
Published: June 2013

In the process of speaker recognition, specific algorithm is adopted to classify differentspeakers. In this paper, Multiclass Core Vector Machine (MCVM) is used to the solve speakerrecognition problem. At first, CVM transform quadratic programming of traditional SVM into theMinimum Enclosing Ball (MEB) problem, which significantly reduces the complexity ofcomputation and then, defining an SVM with vector valued output. At last, Experimental results showthat the algorithm is feasible and effective for speaker recognition.
Comprehensive Assessment Method of Equipment Support Exercise
Authors: Zhao Wu Kui , Zhang Cheng , Wang Yi Bo
Published: June 2013

Equipment support exercise is the highest phase of equipment support training and an effective approach to improve equipment support capability. Assessment of equipment support exercise is the main measure to test and rate the effect and level of equipment support exercise. The main influencing factors of equipment support exercise are analyzed and the index system is established from the angle of equipment support capability. The assessment model of equipment support exercise is constructed based on the basic ideas of analytic hierarchy process (AHP) and fuzzy evaluation method. The assessment process of equipment support exercise using the proposed method is illustrated in detail. The correctness and validity of the proposed method is verified through a calculation example. The result of the example indicates that the proposed method can give correct assessment level of equipment support exercise, which provides an effective approach for the assessment of equipment support exercise.