bluuebunny/crossref_metadata_2025 huggingface dataset:
Research and Development of Data Acquisition System for NC Machining
Authors: Cui Xiao Hong , Lui Qiang
Published: June 2014

Cutting as the highest proportion of the machining process, is developing from the ordinary cutting to high-speed, efficient, high precision and composite. In this paper, considering the importance of machining process data and the timeliness of data acquisition under the existence of a large number of data , we research and establish a data acquisition system under network environment, elaborate the structure and design idea of the system and introduce the key technology in the realization of data acquisition system.
An Improved Design Method of the MEMS-Based Folded-Beam Micromirror
Authors: Li Yan Mei , Chen Qing Hua , Chen Ying Jun , Wu Wen Gang
Published: June 2014

In this paper, the folded-beam torsion MEMS mirror that meets a set of specified constraints was developed. An optimization algorithm that we newly adopted in the RCS(restricted competition selection) GA(genetic algorithm) could overcome some difficulties in single-search algorithms. Moreover, by the proposed method, the designer’s experience, and view and judgment could be reflected effectively.
The Test Research of LNG Cylinder Valve
Authors: Xu Wei Pu , Li Qian , Liu Yi Ting , Wang Chao
Published: June 2014

This paper introduces the current development of LNG cylinder valves, discusses LNG cylinder valves manufacturing, also the inspection and testing during the process of regulatory license.
Fabrication of the Open-Loop MEMS-Based Tilting Mirror Using the Compound Process
Authors: Chen Ying Jun , Li Yan Mei , Chen Qing Hua , Wu Wen Gang
Published: June 2014

In this paper, a kind of novel open-loop two-stage torsion-mirror optical actuators has been demonstrated. The mirrors are fabricated in SOI wafers, and exhibit good basic electromechanical characteristics. They provide an impetus to being brought into use as optical switches or attenuators, etc. for fiber communication applications.
Numerical Simulation of Vertical Axis Wind Turbine Blade Airfoil Performance
Authors: Zhao Li Hua , Liu Ming , Lv Tie , Mei Xiao Qun
Published: June 2014

Research of blade airfoil aerodynamic characteristics is an important foundation for the vertical axis wind turbine aerodynamic design and performance analysis. CFD simulation software has been applied in this paper. Representative lift-type vertical axis wind turbine airfoil NACA0014, NACA2414, NACA4414, NACA6414, NACA8414 's aerodynamic simulation have been studied. Camber airfoil relative with the change in to the flow velocity is analyzed. At different angles of attack effect on the aerodynamic performance of wind turbines, variation of parameters for airfoil aerodynamic had been analyzed. It will help the optimal design of airfoils for vertical axis wind turbines.
The Application of GIS Spatial Analysis Method in Biomass and Carbon Storage Jatropha Curcas
Authors: Xu Xin Hui , Zhao Xiao Qing
Published: June 2014

It has become the international geosphere biosphere program, the world climate research programme and one of the core tasks of global change human factors plan that the global carbon cycle and curb greenhouse gas concentrations continue to rise , therefore, the existing biomass and carbon storage quantity of ecosystem research has important practical significance. We analyzed Jatropha curcas L biomass in Yunnan Simao district, basing on GPS location positioning, combining ARCGIS spatial analysis technology, selecting ecological factor such as altitude, slope, land use. Studies have shown that the Jatropha curcas L biomass under different land use types have significant differences by using the background data of these factors, with the help of space analysis method, combining with the measured data validation, respectively, it is: the most IS plantation, the second is cultivated land, the third is weeds, and the least is shrubbery. The research results can provide based data for Jatropha curcas L biomass and carbon storage calculation, also provide information for the decision-making department industry.
Research and Application of Special-Shaped Thin-Walled Parts Processing Technology
Authors: Sun De Ying
Published: June 2014

this article through the analysis and application of special-shaped thin-wall aluminum alloy parts, discusses the parts processing technology, in order to solve the problem of deformation and low machining efficiency, provide a reference for machining similar parts.
Experimental Study of Adsorption of Ammonia Nitrogen from Wastewater onto the Bagasse Adsorbent
Authors: Xie Li Wei , Xu Ze Long , Huang Yan Hua , Cao Shuang , Zhu Zong Qiang , Zhu Yi Nian
Published: June 2014

Adsorption of ammonia nitrogen from aqueous solution onto the bagasse adsorbent has been investigated to evaluate the effects of Adsorbent dose, initial NH4+-N concentration, and pH on the removal systematically. With increasing initial concentration, the amount of ammonia nitrogen sorbed onto the adsorbent increased until it gradually decreased due to the initial concentration exceed 50 mg·L-1, and the maximum adsorption capacity was observed for the sample to be 1.31 mg·g-1 at the initial concentration of 30 mg·L-1, and the corresponding removal rates decreased from 94.01 to 3.89%, with increase in initial concentration from 5 to 100 mg·L-1. Adsorption capacities decreased from 6.04 to 0.49 mg·g-1 with increasing adsorbent dose from 0.1 to 1.5g. What’s more, under alkaline condition, the removal efficiency of ammonia nitrogen from aqueous solution onto the samples were superior to that under acidity and neutrality condition.
The Current Status and Future Directions of Cutting Tool Materials
Authors: Dai Ying Peng , Xu Shu Qiong
Published: June 2014

This paper introduces the performance and application of various cutter materials including high-speed steel, cemented carbide, ceramic and super-hard material. The current status and prospect in the tool materials are discussed.
Anti-Rutting Performance Analysis of Asphalt Mixture with Different Natural Asphalt
Authors: Huang Wen Tong , Xu Guo Yuan
Published: June 2014

The modification mechanism and high temperature deformation law are obtained by the rutting test of the same matrix asphalt and aggregate gradation with different natural asphalt mixture. It proves that the anti-rutting performance of the asphalt mixture with Iran rock is close to that of SBS modified asphalt mixture.
Fea Analysis for the Trunk Beam of the Portal Crane
Authors: Li Kai Ling , Wang Li Li , Shan Nan , Tang Wei Xiao
Published: June 2014

The trunk beam is an important part of the portal crane. Due to the complexity of the structure of the trunk beam and the state under loads carried on, it is difficult to produce a detailed analysis using only the knowledge of theoretical mechanics and mechanics of materials. The deformation of the trunk beam, as well as the stress distribution of the beam was obtained with FEA method, and how to improve the design of the trunk beam was discussed in this paper.
Numerical Simulation of the Aerodynamic Performance of a H-Type Wind Turbine during Self-Starting
Authors: Zuo Wei , Kang Shun
Published: June 2014

The aerodynamic performance and the bypass flow field of a vertical axis wind turbine under self-starting are investigated using CFD simulations in this paper. The influence of pitch angle variations on the performance of the wind turbine during self-starting is presented. A two-dimensional model of the wind turbine with three blades is employed. A commercial software FlowVision is employed in this paper, which uses dynamic Cartesian grid. The SST turbulence model is used for turbulence modeling, which assumes the flow full turbulent. Based on the comparison between the computed time-dependent variations of the rotation speed with the experimental data, the time-dependent variations of the torque are presented. The characteristics of self-starting of the wind turbine are analyzed with the pitch angle of 0o、-2oand 2o. The influence of pitch angle variations on two-dimensional unsteady viscous flow field through velocity contours is discussed in detail.
Modeling the Rate Dependent Hysteretic Dynamics of Magnetostrictive Transducers
Authors: Du Xiu Quan , Wang Lin Xiang , Tang Zhi Feng , Lv Fu Zai
Published: June 2014

In the current paper, the rate dependent hysteretic dynamics of a magnetostrictive transducer is investigated by using a coupled nonlinear macroscopic differential model. The transducer is modeled as a one-dimensional magnetostrictive structure based on the Landau phenomenological theory of phase transition. The hysteresis loops and butterfly-shaped behaviors in the magnetic and mechanical fields are both successfully modeled with estimated model parameter values. The capability of the proposed model for capturing the driving rate dependency is illustrated by numerical experiments.
Research on Parametric Modeling Method of Product Based on Directed Graph
Authors: Li Yong , Xie Yang Yang , Zhang Yong Tao
Published: June 2014

The parametric model of product is the foundation of implementation product series design. In order to solve the data conflict problem of product series design in the process of parametric modeling, a parametric modeling method of product was proposed based on the directed graph. Product, components and parts was expressed by vertex, and the driven relationship of parameter for model was expressed by directed edge. The process of product parametric design was analyzed and reconfigured by the structure directed graph of product parametric model. The structure directed graph of product parametric model was divided into a number of sub-graphs, and those sub-graphs were combined to directed trees of the parametric model of product. The parametric model of product was achieved to support product series design. So product parameters was droved from top-down so as to improve the efficiency of modified and reuse of parametric model of product and convenient to operate within the model. As an example, the series design of the Gatling gun proved the applicability and effectiveness of the method, and the method can meet with product series rapid design
Concurrent Core Test Based on Partial Test Set Reusing
Authors: Huang Xi Lei , Yi Mao Xiang , Wang Lin , Liang Hua Guo
Published: June 2014

A novel concurrent core test approach is proposed to reduce the test cost of SoC. Before test, a novel test set sharing strategy is proposed to obtain a minimum size of merged test set by merging the test sets corresponding to cores under test (CUT).Moreover, it can be used in conjunction with general compression/decompression techniques to further reduce test data volume (TDV). During test, the proposed vector separating device which is composed of a set of simple combinational logical circuit (CLC) is designed for separating the vector from the merged test set to the correspondent test core. This approach does not add any test vector for each core and can test synchronously to reduce test application time (TAT). Experimental results for ISCAS’ 89 benchmarks have been rproven the efficiency of the proposed approach.
A Study on Feasibility Test of Application of Waste Rubber-Derived Renewable Fuel Improved Biodiesel in Diesel Engine
Authors: Shao Ming Wei , Huang Ying Jeh
Published: June 2014

This study applied the environmentally-friendly fuel oil blended with biodiesel to combustion in diesel engines to solve waste tire contamination, save fuel oil and reduce energy consumption, and thus fossil fuel replacing oil product is feasible. Also, blended environmentally-friendly fuel oil is proposed to improve application of biodiesel in diesel engine. Relevant feasibility tests of diesel engine were conducted to ensure the blended environmentally-friendly diesel can be used for combustion in various commercial oil engines. This solution can control combustion efficacy, ensure cleanness and stability of emissions, maintain the best combustion efficiency, reduce pollution emission, fulfill energy efficiency and emission reduction carbon, and prevent pollution of existing wastes.
Monte Carlo Simulated the Detection Efficiency of Different H/R Ratio of NaI:Ti Crystal
Authors: Hu Jun Peng , Liu Fang , Ouyang Xiao Ping
Published: June 2014

We make use of Monte Carlo simulation to investigate the detection efficiency versus different H/R ratio of NaI:Tl detectors, and the volume of detector is constant. The energy of incident monoenergetic γ rays is 4.438 MeV, 1.331 MeV and 0.662 MeV emitted from AmO2Be,137Cs and60Co respectively. The size of NaI:Tl detector dimension is setted up to 20 groups of different radius (H) and height (R), whereas the volume of NaI:Tl crystal will not be changed. The result reveals that the detector efficiency dependence on H/R ratio of the NaI:Tl detector and the incident γ-photon energy. For very low H/R ratio, the detector efficiency increase rapidly and tend to be stable. We draw a conclusion that when the H/R ratio is approximately equal to 1.5, the incubation effect is more obvious, which contribute to the increase of detection efficiency. It is meaningful of the research, namely, it be beneficial to design the optimal dimension of detector for detecting γ rays of 4.438 MeV, 1.331 MeV and 0.662 MeV.
Research of the Laser System for Real-Time Measuring the Muzzle Velocity of Projectile
Authors: Xiao Zhi Hua , Xie Wei Shi , Tang Jian
Published: June 2014

The study of ammunition system of weapon with extra-high firing rate projectile screen is the new trend of precision strikes and shooting. In this paper the developments achieved in the field are described. Our study status of this task is presented. The key advanced techniques for the ammunition of this weapon system have been analyzed. It will play an important guiding role in the development of new concept equipment.
Identification of Creep Parameters of P91 by Small Punch Test
Authors: Geng Jin Feng , Cai Hong Sheng , Ma Dong Fang , Feng Xiang Sai , Guan Kai Shu
Published: June 2014

Four levels of load were performed on different small punch creep specimens in order to investigate the creep properties of the P91 by small punch creep test at 600°C. A practical method was proposed to identification of creep parameters of P91 by comparison of experimental curves and simulate curves from only one experimental curve. The other three experimental curves was performed to verify the practical method.
Hardware-In-Loop Test Platform for Electronic Control Unit of Fuel Cell System
Authors: Li Ling , Yao Jie , Liu Fen , Weng Zhi Fu
Published: June 2014

Due to the features of complicated test environment, variable parameters, and limited conditions in real car experiment, it has proposed a Hardware-in-Loop test platform for Fuel Cell System (Short for FCS) based on hardware of NI PXI and software of NI Labview to fuel cell vehicle. According to FCS’s control strategy, I/O signal map, CAN communication and sensor characteristics, it has designed the hardware configuration, software program, test interface, and rapidly made validation to control logic and fault diagnosis of Fuel Cell System’s Electronic Control Unit (Short for FCU). The experiment result shows that this test platform is effective for FCU control logic validation, system status monitor, fault injection, fault tracing, and it can shorten the vehicle research and development cycle, reduce the development cost, optimize test environment and promise safety for test engineer. This test platform will make good effect to vehicle electrical system development and supply reference for vehicle test.
Application of Reference Designation for Power Plants to Wind Turbines
Authors: Yi Li , Liu San Yong , Yu Qiang Qiang
Published: June 2014

RDS-PP (Reference Designation for Power Plants) is a new identification system for power plants, which basis and structure are based on international standards. With the purposes to meet the designation of new power plants like wind power plant, KKS (Kraftwerk-Kennzeichen system) is developed to RDS-PP. VGB technical committee recommends newly-built power plants adopts RDS-PP directly. Though leading to additional work, adopting new identification system have a long term economic effect.
The Mobile Battery Recharging/Swapping System for Electric Vehicles - A Valuable Instantiation of Internet of Things
Authors: Zhou Jin , Yang Guan Qun , Tang Guo Chun , Zhu Ming
Published: June 2014

Due to their prominent environmental protection and energy saving characteristics electric vehicles are promoted in all nations. On the other hand, the application of internet of things in all walks of life has received great attention in China. Though the profit model with internet of things technology is not clearly defined, this paper focuses on discussing in details the application of internet of things in the mobile battery recharging/swapping system for electric vehicles and possible update of operation and profit model.
The Design Based on Integrated Criterion to Faulty Line Selection for Small Current Neutral Grounding System
Authors: Hu Han Mei , Li Qin Feng , Hong Bo , Fang Nian
Published: June 2014

Small current neutral grounding system is widely used in 3~66 kV power distribution system in China. In this power system, the single-phase to-earth fault occurs frequently in distribution, thus how to detect the fault line with great accuracy and high efficiency is an important subject in protective relaying of power system. According to a variety of existing theories of fault line selection for small-current neutral grounding system, this paper presents a new design based on integrated criterion, which has been applied in actual production.
Mathematical Model and Control of Axial Hybrid Magnetic Bearings Based on α-th Order Inverse System Theory
Authors: Zeng Run Zhang , Zhu Huang Qiu
Published: June 2014

A linearization control research based on α-th order inverse system method has been developed for an axial hybrid magnetic bearing, which is a nonlinear system. The configuration of the axial hybrid magnetic bearing is briefly introduced, the working principle of the hybrid magnetic bearing is analyzed, and then the suction equations are set up. Based on expounding of α-th order inverse system method, and aiming at dynamics model of the axial hybrid magnetic bearing, the feasibility of linearization control is discussed in detail, the linearization control arithmetic based on α-th order inverse system method is deduced, and then close system controller is designed. Finally, the simulation system is set up with MATLAB software. The step response of system, the start up displacement curve of rotor and the performance of anti-disturbance of system are simulated. The simulation results have shown that the α-th order inverse system control strategy can realize accurate linearization for nonlinear mathematical model of the axial hybrid magnetic bearing, and the designed close control system has good dynamic and static performance.
Research on Reconfigurable Method of Open CNC System Software Based on Linux
Authors: Li Shi Zhen , Lin Shu Wen
Published: June 2014

For the development requirements of high-performance, open CNC system. A reconfigurable and modular upper control software architecture of open CNC system is proposed based on PC+I/O card architecture and Linux software platform. Through this architecture users can quickly customize and develop the required CNC software. Structure model of module with three different levels and each module interfaces are mentioned. Basic consist of upper control software which is achieved by these structure model are introduced. Upper control software modules and communication mechanisms are described. Upper control software of the architecture is achieved on Linux operating system, and the simulation results is given.
Signal Analysis of Magnetic Control Seam Tracking Based on the Hilbert-Huang Transform
Authors: Hong Bo , Xu Ai Jun , Liu Jian , Li Xiang Wen
Published: June 2014

According to the fact that the nonlinear magnetic control welding signal is not smooth, this paper proposes a signal extraction and an analytical method of the system based on Hilbert-Huang transform magnetic control arc seam tracking sensor. First, the magnetic control to track the signal motivated by cycle is decomposed into several intrinsic mode functions from high frequency to low frequency component by using the empirical mode decomposition. On the basis of the Hilbert marginal spectrum of each component, distribution of time-frequency transform to each component can effectively restrain cross terms and extract the real-time signal dynamic law reflecting magnetic control seam tracking. This method used in a certain experimental platform for magnetic control arc welding seam tracking sensor platform signal analysis, has produced a good effect and extracted the seam tracking signal, which can offer more valuable information and help to further reveal the frequency and spectrum characteristics of various interference sources in the weld automatic tracking system. Furthermore, It also provides a theoretical basis for establishing the welding signals with excitation source as well as a new nonlinear model.
Study on Control Technology of Pneumatic Servo Spot Welding Gun
Authors: Sun Zhong Sheng , Dai Jin
Published: June 2014

Control technology of pneumatic servo spot welding gun is studied, using the proportional flow valve as the control device. The mathematical model of the proportional valve-controlled cylinder system is established, and the experimental studies of position and force control for pneumatic servo spot welding gun have been done. The experimental results show that the servo gun opens smoothly and fast, the impact of electrode is greatly reduced, and the electrode force is controlled precisely and kept steadily, the quick changing of the electrode force is achieved in the welding process.
Study on Pr6O11-Doped Superfine-Grained WC-Co Cemented Carbides
Authors: Wang Jun , Yang Qi Kun
Published: June 2014

Effect of Pr6O11addition on the microstructure and properties of superfine-grained WC-Co cemented carbide was studied by experiments. The experimental results show that Pr6O11can inhibit WC grain growth. In addition, the η phase firmed when the content of Pr6O11was more than 0.8%. When Pr6O11dopant amount is 0.4% and 0.8%, the alloy has the best bending strength and the best hardness respectively.
Optimization of Malachite Green by KOH-Modified Grapefruit Peel Activated Carbon: Application of Response Surface Methodology
Authors: Luo Liu Dan , Huang Hai Yi , Bi Jian Hong , Tan Lang Lang , Zhang Hua , Zhang Di
Published: June 2014

Response surface methodology (RSM) was utilized to optimize the best adsorbent conditions on Malachite Green in wastewater by the activated carbon which has been prepared from grapefruit peel with potassium hydroxide activating. Built on single-factor experiment, adsorbent dosage, pH, initial MG concentration and temperature were chosen as influencing factors during adsorption. The experimental mathematical model was arranged according to central composite design (CCD). The results shown that the best conditions were pH 9, initial MG concentration of 2000 mg/L, 1 g/L dosage of KAC and 40°C. Maximum absorption was 1944.35 mg/L.
Numerical Analysis of Temperature Distribution in Generator Stator Bar with Different Insulation Thermal Performance
Authors: Zhang Li , Lei Yi Ming
Published: June 2014

Accurate descripting the temperature distribution of stator bars for the genaraors with big capacity is necessary. The stator bar of one 600MW generator was simulated for getting the temperature distribution. Several methods of dealing with the insulations were compared. How the heat conduction performance of insulations is good for the heat transfer of stator bars was discussed.
Coupling Analysis of Electroencephalogram Based on the Multiscale Mutual Mode Entropy
Authors: Ji Ning , Tan Jun , Pei An Shan , Dai Jia Fei , Wang Jun
Published: June 2014

This paper presents the Multiscale Mutual Mode Entropy algorithm to quantify the coupling degree between two simultaneous acquisitions of EEG time series on different scales. It discusses the young and middle-aged people’s characteristics of brain electrical signal based on the algorithm. The results show that they both have the similar change trend of entropy value and middle-aged people have higher entropy value than the young from 6th scale gradually. Mutual Mode Entropy also has good noise resistance in the process of scale change and can distinguish the coupling difference of EEG between the two types of people.
Design and Development of Virtual Interactive System for Paper-Cut Producing Process
Authors: Wang Xiao Fen , Wang Yan Zhen
Published: June 2014

In order to satisfy the strong demands of learning paper-cut from the public and paper-cut lovers and the needs of art education and training to practical ability for children and teenagers.Taking full use of the advantages and features of 2D interactive animation, we designed and implemented a virtual interactive system based on the classification of paper-cutting technique. Learners without paper-cutting experience can master the basic techniques of paper-cutting, and appreciate the integrity of the production process of paper-cutting through this system, which will promote the inheritance and development of folk paper-cut product techniques.
Construction of the Computer Network Reliability Evaluation System
Authors: Zhang Xin Chang , Duan Mo Yi , Wang Li Qun
Published: June 2014

This research team proposes a network survivability evaluation method (Survivability Algorithm based on Immune Clonal Simulated Annealing, SAICSA), is used to solve the problem of network congestion due to link failure in communication network. The method by establishing the clone variation and the clone crossover operation rules, combined with the simulated annealing acceptance criteria to obtain the optimal annealing temperature tends to zero. At the same time, simulation experiment is carried out to the actual data, in-depth study of the relationship between network validity and effect the number of edges, the initial temperature and other factors. The results show that, compared to the immunization program of simulated annealing algorithm and genetic simulated annealing algorithm, SAICSA algorithm shows good adaptability.
Virtual Software Testing Service Based on Cloud Computing
Authors: Liu Shu Kun , Tang Jin Peng , Chen Ji Feng , Duan Shan , Li Ling Lin , Kuang Qiao Yan , Cai Mei Ling , Hu De Peng
Published: June 2014

Clouding computing and virtualization technology have brought immense effects to software organizations including software testing region. At the same time the method and related technology will be changed a lot. Some concepts, structures and characters are described in this paper. Software testing should be regarded as a service. Four typical patterns of cloud testing and the relations among them are showed in the paper. Combined with the virtualization technology, the frame of TaaS (Testing as a Service) is defined too. In the meantime, cloud testing and traditional software testing is compared with each other. At last, the main research contents about software testing in virtualization environment are summarized.
An Introduction of Aluminum Alloy Casting in Aircraft Structure
Authors: Liu Yang , Zhang Ren , Zhang Jun
Published: June 2014

As one of the important metallic product used in civil aviation industry, aluminum alloy casting is well discussed. Compared with wrought products, the advantages of aluminum alloy casting enable the structure design of aircraft much more efficient on the weight and cost saving, while its disadvantages restrain the application from spreading into conditions that high strength is required. However, with the development of casting as well as the new metallic forming technics, there must more options of materials for the future aircraft structure manufacturing
Rejection of Heavy Metal Ions with Polyelectrolyte Composite Nanofiltration Membrane
Authors: Chen Hong Mei , Guo Hong Xia , Ma Yue , Qin Zhen Ping , Xie Guo Li
Published: June 2014

Nanofiltration membrane was prepared by static layer-by-layer (LBL) self-assembly of poly (ethyleneimine) (PEI) and poly (sodium 4-styrenesulfonate) (PSS) on the modified poly-arcylonitrile ultra-filtration membrane. Study on self-assembly of polyelectrolyte membranes with changing surface charges and wettability, rejection properties of nanofiltration membrane in different conditions and pH with respect to heavy metal ions, namely Ni2+and Cd2+were investigated. The results show that the PEI/PSS membrane composed of 4 bilayers at operating pressure 0.4MPa, rejection of PAN-PEI/PSS nanofiltration membrane towards these 2 kind of heavy metal ions reached no less than 90%.
Finite Element Analysis of Materials and Processing of Composite Flywheel Rotor
Authors: Guo Song Yi , Li Chong , Li Wen Yi
Published: June 2014

Flywheel rotor is the very important component in the flywheel energy storage system (FESS). The key factors of rotor, such as rotor materials, geometry and fabrication process, have directly influence on the performance of FESS. At present, press-assembling the rotor with shrink-fit is used usually to increase strength of composite flywheel rotors filament wound in the radial direction. This paper is concerned that the Von Mises equivalent stress distribution of the metal hub and the radial stress distribution of the composite rim at the speed of 20000rpm by the 3D finite element method. The materials and corresponding minimum value of interference fit of the flywheel rotor are determined based on the analysis results.
A Design of Image Acquisition System Based on FPGA and USB2.0
Authors: Guo Jing Jing , Xu Xiao Jing , Kang Jin Tao
Published: June 2014

The paper introduces a realization method of high-speed image acquisition system based on FPGA and USB2.0. After introducing the CMOS chip MT9T001 of Micron Technology, Inc. and the universal interface chip CY7C68013 of Cypress Semiconductor Corporation, we design the hardware platform of image acquisition system and the control program written by Verilog HDL language through which FPGA can simulate I2C bus to configure CMOS. Then we introduce the development of firmware, driver and application of the USB interface. This paper completed the design and the experiment of image acquisition system well. In the test, the system achieves the requirement of real-time display. The collected images are clear, which can satisfy design requests.
The Fault Analysis and Simulation of Vehicle Hydraulic Shift System Based on AMESim
Authors: Hu Li Ming , Ru Yan , Jiang Qiang , Hu Xiao Rui
Published: June 2014

Based on the analysis of the working principle and the failure phenomena as well as their mechanism of a particular type of tracked vehicle hydraulic shift system, a model of the hydraulic system is established using the fluid simulation software AMESim. The responses of the system are then calculated through adjusting some of the parameters of the system and inputting various fault information into the simulation model, so as to find out the correspondence between the dynamic characteristics of the system abnormity and specific component failures. It can be concluded that such simulation can serve as an easy and reliable way to analyze all kinds of fault responses in order to provide a solid reference basis for the fault diagnosis of the actual system.
Study on Universal Intelligent Monitoring System in Heavy Machinery Based on CANopen Protocol
Authors: Zhou Qing Hui , Lu Si Yuan , Li Qing Bo
Published: June 2014

As a hot-spot research and development in heavy machinery, monitoring system has the urgent practical significance in engineering machinery fields. So, a universal monitoring system in heavy machinery is designed based on CANopen protocol. OD2131 MCU(micro controller unit) is used in the system because it communicates in a CANopen protocol and embeds many function module which reducing the workload of secondary development. And then, a friendly human-computer interaction interface is developed to achieve online test. Finally, the communication test is done repeatedly. The test result is shown that the intelligent system can run in accordance with CANopen standard communication protocols, and finish the communication successfully. The measuring data shows the same values and trends compared with the exact data in the wind velocity test.
Design and Implementation of Power Grid Dispatching Fault Diagnosis Knowledge Base
Authors: Xu Xiu Feng , Wu Yan Yan
Published: June 2014

The paper designs the urban-rural power grid dispatching fault diagnosis expert system which acquires fault information by SCADA system of automatic system of urban-rural power grid, and uses artificial intellegence method to analyze fault information and make fault diagnosis. The paper implements the core part of the fault expert system—the design of knowledge base and fault inference engine.
Overview of Distribution Automation
Authors: Zhou Xue Song , Yuan Ya Fei , Ma You Jie
Published: June 2014

A distribution system consists of all sorts of power distribution equipment, communication system and control equipment. It works according to certain rules to meet the demand of users by the high quality of electric energy . Distribution Automation (DA) can realize the automation of system operation and management to provide customers with stable, reliable electricity and obtain maximum benefits .This paper generally introduces the concept, function, developing future of Distribution Automation System. Distribution Automation includes feeder automation, automatic distribution management and user automation, and this paper introduces the basic situation and problems of them. Finally, it is concluded that Distribution Automation is the inevitable trend of Distribution System,and will be gradually developing in the direction of smart distribution grid.
Flow Characteristic and Optimal Design of Rectangularly Tapered Header Based on CFD
Authors: Ji Xiao Hui , Liu Wei
Published: June 2014

In order to study reasonable structure of rectangular tapered header, the methed of computatation fluid dynamic was used to research pulp distribution characteristic of the rectangularly tapered pulp distributor and to optimize its structure. The results show that velocity distribution and pressure distribution in the tapered header were not uniform and the mass flow rate out of branch pipes was obviously accrescent from inlet of header to outlet of header. There was remarkable deviation comparison to expected value of mass flow rate. The real backwall shape of the rectangularly tapered head was a complicated curve that was obviously different to the simplified header at area of the inlet and the outlet. The pressure distribution in the optimally designed header was more uniform and the pressure curve at the location corresponding to branch pipes was nearly a horizontal line. The mass flow rate distribution out of the branch pipes was more uniform else and was close to the expected value curve. The deviation of the mass flow rate in every branch pipe was less than 1%.
Active Control Technology for Equalizer in Electric Vehicle Battery System
Authors: Sun Peng , Wang Zhao Jing , Xing Hai Feng
Published: June 2014

In this paper, a new charge equalization converter using flyback multi-winding transformer for electric vehicle battery system is presented, and 3 balancing strategies are proposed. The essay shows the principal and circuit of the equalization system , and the way to build the simulation model for the balancing system is described. To verify the usefulness of the equalizer design method, several simulations and experimental results are shown.
Adsorption Selectivity of Fatty Acid Collector by Synthetic Magnetite
Authors: Zhang Han Quan , Wang Feng Ling
Published: June 2014

Selective adsorption of collectors on mineral surface can directly impact the flotation separation performance. Mineral flotation tests indicated that reverse flotation of synthetic magnetite can only bring a 2 to 4 percent increase in the concentrate grade, tailings grade remains high. The amounts of commonly used fatty acid collector, such as sodium oleate, adsorbed onto mineral surface are measured with indirect measurement to investigate adsorption selectivity of fatty acid collectors by synthetic magnetite. Results showed a higher selectivity in collector adsorption for natural magnetite, with 38.25% difference in the average adsorption rate of sodium oleate between the valuable minerals and gangue, but a less selective adsorption of fatty acid collector onto artificial magnetite, with only 1% difference in the average adsorption rate between its valuable and gangue.
Densification Process and Properties of Powder Metallurgy Ti-5Al-2.5Sn Alloy
Authors: Xu Lei , Guo Rui Peng , Lei Jia Feng , Yang Rui
Published: June 2014

Net shape process from pre-alloyed powder has become a viable approach to manufacture high-performance, complex shaped titanium alloy components. In this work densification of Ti-5Al-2.5Sn powder compacts in mild steel containers by means of hot isostatic pressing was studied. Due to the shielding effect of the container, inhomogeneous deformation of Ti-5Al-2.5Sn powder compacts was observed during the experiment and this was also predicted by a finite element analysis. The mechanical properties of powder metallurgy (PM) Ti-5Al-2.5Sn alloy of different density were compared. Near-net-shape forming processes of PM titanium alloy parts are studied. By using metal capsules and metal internal tooling, near-net-shaping of PM parts with complex shapes was demonstrated. The design of capsules and tooling was found very important because of the different shrinkage ratio of the differently shaped regions of the component.
The Electropolymerization and Characterizations of Fluorescent Dye Doped Poly(3,4-ethylenedioxythiophene)
Authors: Li Xin , Liang Fei Yue , Li Cong Ju
Published: June 2014

The electrochromic properties of an electrochemical polymerized composite consisted of poly (3,4-ethylenedioxythiophene) doped with fluorescent yellow dye (PEDOT-FY) are reported. The structures of PEDOT-FY were characterized via cycle voltammograms, spectroelectrochemistry and colorimetric analysis. Film of the PEDOT-FY composites with different FY concentrations appears multi-color changes, such as blue violet↔brillant blue, aubergine↔blue grey, magenta↔ aquamarine blue, orange-yellow↔grass-green, claybank↔moss green in the neutral state and the oxidized state respectively, which are different from the pure PEDOT of dark blue (-0.8V) and light blue (1.0V). The response time reaching 90% of the full optical contrast of PEDOT-FY was 3.4s for the oxidation process and 2.6s for the reverse reduction process when the [EDOT]/[FY] is 1:2, however, when the FY concentration decreased to [EDOT]/[FY] =1:0.01, the response time reduced to 1.9s and 1.7s for the oxidation and reduction process respectively, which is equal to that of the pure PEDOT. Additionally, the colorimetric analysis results show that components of yellow and red in PEDOT-FY films become stronger than pure PEDOT film at the whole electrochromic process. It is shown that acid dye doping is an effective method to broaden the color change range of the electrochromic mateials.
Effects of Strain Rate on Energy Absorption of High Strength TRIP Steel
Authors: Yang Fei Xiang , Zhu Chao Qun , Zhao Jun Jie , He Yan Lin , Li Lin
Published: June 2014

In this paper, the energy absorption properties of 600 MPa and 800MPa grade TRIP and DP steels under different strain rates were investigated. It was shown that the deformation of dynamic specimens concentrated in parallel section under quasi-static stretching, and the strain rate had nothing to do with the energy absorption of these four steel. In the dynamic tension, the TRIP steel had a better energy absorption capacity than it in the quasi-static condition. However, the energy absorption properties of DP steel were not the case. And with the increasing of the strain rate, the energy absorption of these four steel decreased. It was because that instead of “gradual transition”, the transformation of retained austenite changed to “instantaneous transition” in dynamic tension. It made the energy absorption become smaller than it in static tension. Meanwhile, the ductility and the energy absorption capacity of the DP steel were improved, which effected by the adiabatic temperature rise. Owing to suppression of plastic deformation of these steel in dynamic tension, the energy absorption capacity of these four steel decreased with the increasing of strain rate.
Nanoporous Graphite Materials Produced by Ball-Milling Expanded Graphite
Authors: Wang Hua , Yue Xue Qing , Fu He Wei
Published: June 2014

Expanded graphite was ball-milled for 80 h in a high-energy mill (planetary-type) under an air atmosphere. The products were characterized by scanning electron microscopy. The results show that ball-milling EG produces nanoporous graphite powders.
The Shear Properties of DP980 High Strength Steel Plate
Authors: Ho Ming Hsiung , Wang Pin Ning , Lin Yi Kai , Chang Chih Yi , Shen Ping Chen
Published: June 2014

In this study, the high strength steel DP980 material shear properties were investigated. In the design process, first of all based on literature paper and test specimen optimal size requirements, and then find ways to meet the current test equipment maximum capacity (100 kN). The Studies completed DP980 1.4 mm specimens of tensile test, one-way shear test and forward and reverse shear loading experiments. Limited by the maximum output of the machine capacity 100 kN, the thickness 1.4 mm steel plate with strain gage measurements under unidirectional force generated by experiments at the maximum shear strain of 9.890%. And the forward and reverse biased loading method, the completion of seven Bauschinger shear stress-shear strain curves. In the unidirectional shear test results, first verify that the elastic region of the shear elastic modulus of 74.7 GPa, in line with the basic properties of steel materials. Then the shear stress-shear strain curve is converted to stress-strain curve relationship. Wherein the shear stress-shear plastic portion of the curve was converted by factor 1.81, there is overlap between the tensile and shear experimental results confirm rationality.
Investigation of Membrane Fouling along Membrane Surface during Cross-Flow Micro-Filtration of Semiconductor Wastewater
Authors: Liu Jian Xin , Liu Zhi Jun , Liu Feng Xia , Xu Xiao Fei , Li Zhi Yi
Published: June 2014

Simulation method was applied to study the fouling behavior during the Micro-filtration of Semi-conductor wastewater. In the numerical model, concentration dependent physical properties such as suspension viscosity, density and generalized particle transport diffusivity were considered. The mechanism of suspension transition from liquid phase to gel phase was adopted to characterize the formation of membrane fouling. Fouling resistance distribution along the membrane surface was obtained from the simulation. The results revealed the mass transfer character in the concentration boundary layer and its influence on the formation of membrane fouling. Agreement between the simulation and the experiment results demonstrated the applicability of this numerical method in evaluating membrane fouling during Micro-filtration.
Preparing Graphite Nanosheets by Sonicating Expanded Graphite
Authors: Yue Xue Qing , Wang Hua , Ma Wei , Tian Jun Shuang
Published: June 2014

Natural Graphite Flakes were Treated by Intercalating, Water-Washing, Drying and Expanding, Forming Expanded Graphite. Graphite Nanosheets were Prepared by Sonicating Expanded Graphite in a Liquid Medium. the Corresponding Products were Characterized by Scanning Electron Microscope. the Results Show that the Graphite Nanosheets as-Prepared have an Average Diameter of 16μm and an Average of Thickness of 25 Nm.
Research on RFID Enabled Inventory Management for Material Containers
Authors: Fu Zhi Yuan , Hu Jing Yu , Chen Xu Bing
Published: June 2014

In order to solve the practical issues that the management of container inventory is difficult, time-consuming and overuse of manpower in manufacturing enterprises.A method is presented for the material container inventory management, that is, through radio frequency identification technology to achieve positioning and quantity of material containers. Then, the traditional manual inventory becomes automatic inventory which occurs at each container’s transfer process. The material container inventory management based on RFID is designed in the paper through the introduction of the applied RFID technology, architecture system design, hardware selection and software design. At last the practicability and superiority of the system is tested by run the system in a factory.
The Effect of Operating Parameters on Flotation Dynamics of BF-40 Flotation Machine
Authors: Cao Liang , Lai Mao He , Chen Dong
Published: June 2014

BF type flotation machine is a kind of self-air & slurry suction flotation machine. In this paper, several key flotation kinetic parameters of BF-40 flotation machine are introduced, and the relationships of impeller rotating speed, impeller immersion depth, air suction amount, power consumption and air dispersion are studied by water test. Best test result is obtained on the condition of main shaft rotating speed of 151r/min, impeller immersion depth of 1195mm, which provides theory basis for the equipment industrialization.
Durability Test Station Structure Design and Optimization
Authors: Zhou Li Bo , Zheng Wei , Liu Su Hua
Published: June 2014

The structure of the sensor endurance test station is designed. Satisfied with the request of the performance, structural parameters of the spindle and bearing are calculated to minimize the spindle mass using optimization theory. By the static analysis, fatigue analysis and frequency analysis of spindle and bearing using the FEM, the simulation results indicate that the optimized structures can meet the demands for the strength and dynamics of the flywheel system, which leads to safe and stable work, improve design efficiency effectively, shorten design cycles, and reduce production costs. In order to reduce the eccentric force of inertia and intensity of the vibration source, the need for computing unbalance spindle, and a mechanism for balancing, allowed reaching equilibrium precision. After commissioning test station, running at high speed working in good condition, system run more smoothly, to meet the requirements.
Application of New Materials in Water Hydraulic Pump
Authors: Wang Dong , Huang Cheng Yi , Huang Jun Ming
Published: June 2014

In water hydraulic piston pump, poor lubrication is more likely to happen than in oil hydraulic one because of difference in properties between water and oil. So there are some key problems such as corrosive wear and erosion, which are investigated briefly in this paper. Many new materials have been developed, which give longer life expectancies with water without corrosion and erosion. Recently, a new type of water hydraulic piston pumps with better suction characteristics had been developed. Much of this research has concentrated on new materials, structure and experiments, which are also specially introduced in this paper.
The Fatigue Life Analysis of Prestressed Wire-Wound Super-High Pressure Vessel Based on ANSYS
Authors: Wu Jun Fei , Lan Jun Bin , Hu Kai , Li Qing Ling
Published: June 2014

With the the development of super-high pressure technology such as the super-high biological treatment processing, the wire-wound prestressed vessel was widely used as the main pressure bearing structure. It’s proved that the stress was well-distributed along thickness direction and the carrying capacity was improved comparing with traditional pressure vessel. But the deign of wire-wound pressured vessel so far only checks out the fatigue strength margin of winding wire according to the design theory, and lacking of fatigue design of inner cylinder could causes potential safety hazard. So a stress analysis was carried out for prestressed wire-wound vessel with the help of ANSYS, and the fatigue life of the whole prestressed vessel was validated by means of theoretical calculation and the Fatigue Tool .