bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Distributed Heat and Power Cogeneration System Integrated by Gasifier, Stirling Engine and Absorption Cooler
Authors: Leu Jai Houng
Published: July 2011

This study proposes a biomass power and heat cogeneration system that comprised of a gasifier, Stirling engine/alternator, and absorption cooler. Gasification is the most versatile approach to utilize biomass for the flexibility and affectivity of this technology. The flue gas from the combustion of the gasified gas propels a free-piston Stirling engine/alternator, which produces 50 or 60 Hz alternating current as output. The absorption cooler absorbs the residual heat from the flue gas after Stirling engine’s hot end and produces low temperature energy. This cold energy could be used to satisfy air conditioning requirement or be directed to the cold end of Stirling engine to further increase the power efficiency of the Stirling engine. The solid biomass rice husks were tested in this study, in addition, the current power and heat cogeneration system’s gross output exceeded the rated 500w engine gross output for this tested feeds. The total efficiency of this system was approaching to 46%.
Research on On-line Detection and Data Processing Technology of Welding Seam for Bellow
Authors: Ren Zhong Wei , Duan Zhen Yun , Zhao Wen Hui , Tian Guo Fu , Wang Yuan Tao
Published: July 2011

In order to improve the welding quality and welding speed of irregular bellows, according to the characteristic of welding seam of bellows, an automatic and on-line detection technology is proposed in welding technique. The infrared laser sensor is used for measuring with non-contact and real-time detection of welded joint center, the position of welding seam is transfered by the IEEE-1394(Fire Wire). After data preprocessing, the coordinates of feature point are extracted, be storaged and forecasted, then sent to the control system, the moving of welding gun is controlled along track scanning. According to the accuracy analysis of on-line detection system of bellows, the technology of tracking measurement is stable and reliable, and it is effective for improving measuring accuracy and efficiency.
Added Mass, Added Stiffness and Added Damping Coefficients for a Parallel Plate-Type Structure
Authors: Lu Li , Yang Yi Ren , Li Peng , Zhang Ming Lu
Published: July 2011

Flow-induced vibrations of parallel plates in axial viscous flow were studied. Viscous flow theory was applied to describe the fluid-structure interaction. The fluid was supposed to be two-dimensional. The expressions of fluid velocities were created. The pressure grads were gotten with two-dimensional Navier-Stocks equations. Semi-analytical fluid pressures of a three-parallel plate-type structure were obtained. The added mass coefficients, added damping and added stiffness coefficients were determined. These analytical coefficients indicate a strong dependence on gap width.
A New Type of Auto-Balance Device for Grinding Wheel
Authors: Su Jian , Gao Bing
Published: July 2011

The durability and the accuracy are the critical issues for the design of auto-balance device, which have been well discussed in the literature. However existing solutions were incomplete, they have some defects such as their complicated structure, lots maintenance, poor serviceability and poor balance accuracy. In this paper, we proposed a novel scheme to enhance the durability and the accuracy significantly, which includes three main points: The first, we extract fundamental wave signal with discrete Fourier transform. The second, we adopt electric magnetic drive. The third, we employ planetary gear drive with small teeth difference. The experiment results show that our scheme can achieve satisfactory balance accuracy, which validates our analysis. All the results are obtained by over 1000 hours continuous experiments.
Model-Based Verifying and Design of Autonomous Airship
Authors: Liu Yu , Wu Yi Lin
Published: July 2011

Based on the Kirchhoff equations, Newton-Euler laws, boundary layer theory and mass definition, the six degrees of freedom dynamic model of airship complete with aerodynamic forces, wind effect is presented. Then, the nonlinear dynamic model is divided into three group equations by restricting airship motion in different planes respectively. The motion characteristics of airship, including stability, the effect of ballast position and rotational damping, are studied using linearized model. The results of simulation verify the correctness of the theoretical analysis and airship design.
Analysis of Tire Tread Pattern’s Impact on Interior Vibration and Noise Based on Wavelet Transform
Authors: He Jian Feng , Jin Xiao Xiong , Wang Wan Ying
Published: July 2011

The path of tire pattern’s impact on interior noise and vibration was analyzed. The same type tires with six kinds of different tread pattern were selected as the investigating subjects, and the interior measuring points’ vibration and noise signals of different tires were measured under full load condition. The basic theory of Wavelet Transform (WT) and its signal reconstruction principle were researched, and 1/3 octave Morlet wavelet was induced and analyzed. The vibration and noise signals of measuring points were transformed by using 1/3 octave Morlet wavelet, distribution features of vibration and noise signals of six tires with different tread pattern were made a comparison in time domain and frequency domain, and the distinct results of different tires were achieved. The advantage of WT in the aspect of time-frequency analysis for time domain signal is revealed.
Study on Reform of Undergraduate Software Engineering Courses
Authors: Huang Hai Long , Huang Su Zhen
Published: July 2011

This paper points out the problems in software engineering course teaching, and then proposes that by adjusting the curriculum system and using the "project-driven" model teaching could the problem be solved. Besides, this paper completes the course evaluation system, and introduces the evaluation system. And there have achieved remarkable results in the actual process of teaching.
Vibrational Power Flow Analysis of Stiffened Plate and Shell Structures
Authors: Zhu Xiang , Xiao Gong Yu , Li Tian Yun , Hu Xiao Fang
Published: July 2011

In this paper, the vibration and power flow characteristics of stiffened plate and cylindrical shell structures are investigated by using finite element method. The power flow formulas of basic shell structural elements are given at first. Then a simply supported plate and stiffened plate’s input power flow characteristics and power flow vectors are investigated. The effects of stiffeners in plates are discussed. For a simply supported cylindrical shell, the influence of the structural damping, viscous damper and stiffeners on the cylindrical shell’s input power flow characteristics and propagated power flow characteristics are discussed in detail. The power flow vectors are visualized to reveal the distribution of energy in the shell structures. Some useful conclusions are drown and helpful for the vibration control of plate and shell structures.
Design and Implementation of Ethernet-Based VoIP Communication System Management Software
Authors: Li Jie , Miao Chang Yun , Wu Zhi Gang , Guo Cui Juan
Published: July 2011

In order to solve the higher cost of system maintenance and higher risk bringing by MSP430 MCU and DSP site commissioning by using emulator, the Ethernet-based telephone communication system management software was designed based on the hardware platform of VOIP telephone communication system, which realize the remote management, maintenance, and the DSP and MSP430 MCU software online update for the network telephone communication system. The management software developed in Visual C # platform, using a Socket to the network communications. This management software has been put into use, which shows the advantages’ of good stability, simple operation and work efficiency, etc.
VC++ and MATLAB-Based Interactive Filter Design
Authors: Mao Man Qing , Gao Liang , Zheng Wei , Mao Zi Wei
Published: July 2011

Filter designing is a work that most electronics engineers often do. In order to avoid editing cumbersome and duplicate MATLAB program every time when design a filter, now we design a filter designing software based on hybrid programming of VC++ and MATLAB. Users only need to enter the performance index; you can get to meet the requirements of the filter amplitude-frequency curve, phase-frequency curve, and the coefficients of the numerator and denominator polynomial of transfer function to achieve the filter design. Engine is implemented by VC++ and MATLAB mixed programming, making the interface friendly and program simple.
Force Simulation of Cycloid Gear of Horizontal Three-Gear Cycloid Reducer
Authors: Sun Ying Shi , Guan Tian Min , Zhang Shu Lian
Published: July 2011

The speed reducer with three cycloid gears, namely FA high-precision drive speed reducer, is the most advanced drive device all over the world. The speed reducer has the advantages of small size, little weight, large drive range, long service life, good rigidity, good stability and precision, high efficiency and stable drive. Compared with wave drive by robots, the speed reducer has better fatigue resistance, bigger rigidity, longer service life and higher return difference precision; the FA speed reducer is used more and more frequently in becomes the weakest part of the whole structure. The paper mainly focuses on the study of this structure. When cycloid drive adopts a large drive ratio, in order to avoid the interference of cycloid gears, the size of gears is very small so that the strength of gears is reduced, which becomes the weakness for drive. Therefore, the paper adopts the new structure of horizontal gears. The paper analyzes the force upon cycloid gears of this structure mainly by analysis, the sketch of this new structure of horizontal gears for three-gear cycloid gear.
Research Progress of Improving Surface Quality of Microcellular Foam Injection Parts
Authors: Wang Yue , Hu Guang Hong
Published: July 2011

Microcellular foam injection parts have many advantages such as saving material and energy, reducing cycle time, and processing excellent dimensional stability. Despite these advantages, the low surface quality problems limit its application scope seriously. In this study, the microcellular foam injection molding principle and some surface defects were introduced, and the technologies to improve surface quality, such as Gas Counter Pressure (GCP), Rapid Heat Cycle Molding (RHCM), and Film Insulation were summarized in detail. Finally, the prospect of CAE technologies about microcellular foam injection molding was proposed.
Design of Transportable Hydraulic System Fault Detection Equipment for Construction Machinery
Authors: Su Da Zhen , Yang Xiao Qiang , Yan Jun
Published: July 2011

Based on embeded technology a portable fault detection equipment for the construction machinery hydraulic system is developed. The equipment is mainly composed of embeded hardware platform and graphical-interface software platform. The hardware platform includes the core control unit ECM-945GSE industrial computer, 8-channel data acquisition module based on ARM chip, LCD screen, touch screen, power supply module with large-scale operation voltage and wide temperature range, PTT pressure transducers, the integration transducer of temperature, pressure, flow rate transducer as well as equipment chassis. The software system consists of data acquisition procedures, diagnosis, detection and output printing programs and drivers programs. The pilot trial in the armed forces shows that both detectors can be used in repair shop or indoor, but also in the field of construction machinery on-site emergency repair when rapid detection and diagnosis. And it has a strong adaptability.
Research on Dynamic Modelling and Simulation of Erection System of Mobile Equipment in Absolute Coordinates
Authors: Gao Qin He , Li Xiang Yang
Published: July 2011

This paper employed the theories of multibody system dynamics to analyze the multi-rigid-body model of erection system and build the general dynamic models in absolute coordinates. The impact theory of contact mechanics and nonlinear spring-damper force function were used to model the impact problems between rods of multi-stage hydraulic cylinder of erection system and educe the dynamic models of multi-rigid-body erection system with impact. An automatic violation correction method according to the step of integration time was given to solve the violation which is an incident problem in numerical integration of dynamic models in absolute coordinates. Simulation results show that these dynamic models are effective.
Computer Application for Metallurgical Material Field
Authors: Huang Wan
Published: July 2011

At present the design of metallurgical engineering materials research largely also depends on the facts and experience accumulation. As a modern tools, computers increasingly play a huge role in today's world of various fields, it has penetrated into every subject areas and daily lifewhich become the symbol of modernization. In material field, computer is also gradually become extremely important tool. It is one of the important reasons that the application of computer in material science makes materials science rapid development .
Water Flow for Restricted Navigation in Shuifu Wharf on the Jinsha River
Authors: Yang Zhong Chao , Chen Ming Dong , Chen Ming
Published: July 2011

Located in the north of Yun’nan Province, Shuifu wharf on the Jinsha River is an important port on and a key waterway along Yangtze River. The navigation channel is typically mountainous river, with its water area narrow, its trough winding, its surroundings complicated and a variety of cross-river or on-river projects as obstructions. To ensure the safety of navigation and port operation, the two methods of numerical simulation and prototype ship test are adopted to determine the water flow for restricted navigation in Shuifu wharf, i.e., 8000m3/s.
KT5331AS0 and 45 Steel Milling Comparison of Surface Characteristics
Authors: Ding Jian Sheng , Xu Yang Ping
Published: July 2011

To study the surface composition, hardness, microstructure of the machined surface in KT5331AS0 and 45 steel at different cutting parameters and cooling conditions. The results show that: in the cutting process the mass fraction of W in KT5331AS0 steel surface were reduced to varying degrees, the basic chemical composition of 45 steel surface did not change; When KT5331AS0 steel in the high-speed, higher feed rate, it will be cause surface hardness increasing, however the hardness of 45 steel have no regular variation; 45 steel will have greater depth of the torn surface after milling, tearing a wider range, more obvious surface oxidation.
Function Module Based on FPGA System in Textile Machinery Control
Authors: Zhu Li , Yang Yi Min , Yi Pan
Published: July 2011

This paper proposes a design of the equal duty ratio arbitrary integer frequency divider based on FPGA. First it introduces the characteristics and application domain of FPGA in brief, we discusses a few traditional integer frequency dividers. Finally presents the frequency division theory and circuit design of dual modulus preset decimal frequency divider based on FPGA. The frequency divider is described in VHDL tool and simulated with QUARTERSII6.0.
Research on a Flexible Friction Transmission
Authors: Xu Wen Qin , Zhou Bai Qing , Sun Yin Da
Published: July 2011

A practical flexible friction transmission is presented here, which has a stable operation, a high reliability, a low maintenance cost and a high value in use.
Study on Interpolation of NC Based on VB
Authors: Yan Hong , Zhang Li , Liu Zheng , Hu Fang Jun
Published: July 2011

This paper discusses the basic principle of numerical control interpolation, including the straight line and arc (Agreeable circle or Negative circle) interpolation method of point by point comparison, Digital Differential Analyzer (DDA) and time-slicing method. By using Visual Basic 6.0 software, the implementation of the interpolation process and dynamic simulation results are displayed on the screen, and the implementation process of interpolation is observed directly, such as continuous interpolation, manual interpolation, step interpolation and interpolation of a closed graph.
Research on Accessibility of Integral Sliding Mode Contorl of Missile System
Authors: Zhang Wen Guang , Lei Jun Wei , Wang Ling Ling
Published: July 2011

Considering the no uncertain air-dynamic coefficients situation, a kind of sliding mode control law, which was composed of the angle velocity and overload error, was designed for the overload control system of missile. And the accessibility of sliding mode was analyzed. What worthy pointing out is that a transfer- function-type backstepping algorithm was adopted to solve the derivative item of actuator and a novel type of control was proposed.
On the Development and Performance Test of Combined Packing Integrated Device for Treating Domestic Sewage Aboard Ships
Authors: Chen Zhi Li , Xiong Kai Sheng , Zhang Wan Tu , Wang Wen Biao , Chen Wen Ping , Qiao Hua , Yang Yi , Gu Wei Ping
Published: July 2011

This paper elaborates on the development of elastic combined packing and an integrated device for treating domestic sewage aboard ships, analyzes the growth of combined packing microorganisms, the speed of membrane forming as well as the impact of raw water quality on membrane forming, and conducts a simulation experiment of treating domestic sewage by membrane bio-reactors. Researches show that elastic combined packing features high specific surface area and high speed of membrane forming and that this integrated domestic sewage treatment device performs well and can be widely applied.
Design and Fabrication of the First Tribometer in Pakistan
Authors: Ullah Asad , Javed Smeer , Qamar M. Tayyab , Ahmed Nadeem
Published: July 2011

Tribometer is an instrument that offers precise and repeatable wear/friction measurement of a surface. The coefficient of friction is a dimensionless scalar value which describes the ratio of the force of friction between two bodies. It is an empirical measurement; it has to be measured experimentally, and cannot be found through calculations. This tribometer measures coefficient of friction between any two materials in dry test scenario using flat bed approach; moreover it measures both kinetic and dynamic coefficient of friction. As emphasized in the title it is first of its kind being fabricated in Pakistan, which is a huge achievement considering the fact that not much research work is being done in this field in Pakistan. This tribometer is designed to prioritize accuracy and manufacturing cost.
A Study on College Oral English Teaching Based on Virtual Reality Technology
Authors: Li Hong Jun , An Wen Guang
Published: July 2011

Oral English teaching has been in an embarrassing situation because of lacking necessary language environment. With the development of virtual reality technology, using computer technology to build an English learning environment becomes possible, and thus to change the difficult situation of oral English teaching. This paper first introduces the main contents of the oral English teaching and existing problems, then analyzes the theoretical basis and advantages of college oral English teaching basing on virtual reality technology, and finally puts forward some effective ways that the virtual reality technology applies to oral English teaching.
Information Query Mechanism Based on Pastry for Internet of Things
Authors: Liu Dong Dong , Li Zhan Bo
Published: July 2011

Name Services for the Internet of Things are distributed systems that serve a fundamental lookup function to identify the distributed data for tracing the product. However,the currently speciﬁed Object Naming Service (ONS) for the Internet of Things has severe drawbacks ,such as low efficiency and weak security.In this paper, we Put forward a name service architecture based on Pastry algorithm. And an experiment is carried out by OMNET++ simulation platform , experimental results demonstrate that the mechanism in terms of both network throughput, query efficiency has improved greatly compared to ONS.
The Design and Implementation of A Low Cost Temperature Monitor and Control system
Authors: Wu Li , Xu Wen , Guo Jian
Published: July 2011

In this article, the new method for designing the temperature control system with low vibration for a scanning the given object is proposed. The system uses STC89LE516AD as the CPU, and some peripheral circuits: keypad input circuit, the temperature measurement circuit, and LED display circuit to monitor and control the temperature of the given object. By using a small number of hardware devices and software designation, we realize the function of real-time temperature monitor and control. The results show that our goal to construct the temperature control system for a given object with relatively high precision can be realized by using the proposed method, and the system proved to be strong, low cost, with strong practical.
The Design of Enterprise Network Monitoring System in Ethernet Environment
Authors: Sun Ru Xiang
Published: July 2011

Based on analysis of the current enterprise LAN, combining with popular enterprise LAN monitoring software inspection, this paper mainly studied how to build a practical LAN monitoring software system to adapt to Internet era enterprise LAN needs for computer hardware, software, employee network behavior monitoring management. The system is compatible with enterprise domain management, real-time updates with enterprise domain server database, and needs not manual input for system users and the respective computer.
An Implementation of Remote Monitor Master Station Based on CANopen Protocol
Authors: Kuang Fu Hua , Xu Bu Gong , Liu Gui Yun
Published: July 2011

For the development trends and defects of the Water Electrolysis Hydrogen Generation Station (WEHGS), the design of CAN bus distributed network control system based on CANopen protocol is presented. CANopen master characteristics have been analyzed, then the communication implementation of CANopen monitor msater protocol stack, which includes the hardware interface and software design of CAN controller based on the LPC2292, is described. The tested results show that CANopen monitor master meets the requirements of WEHGS.
Combined Shock Response Spectrum of Cubic Nonlinear Stacking Packaging System
Authors: Jiang Jiu Hong , Wang Jun
Published: July 2011

The shock characteristics of a cubic nonlinear stacking packaging system were investigated under the action of half-sine acceleration pulse. The dynamical model of the system was developed, and the numerical results of the dynamical equations were obtained. Based on the results, a new concept of combined shock response spectrum was proposed to describe the shock characteristics of cubic stacking packaging system, focusing more on the maximum of the peak response acceleration of all products at all sensitive frequency since the damage of stacking packaging system occurs when any of the products was damaged. And it’s found that the combined shock spectrum is always made up of the shock spectrum of the bottom layer at lower dimensionless pulse duration and the shock spectrum of the top layer at higher dimensionless pulse duration. Then, the effect of the peak pulse acceleration, the defined system parameter, the damping ratio of cushioning pad in addition to the number of stacking layers on the combined shock spectrum of the system was discussed. It’s shown that all of their effect are noticeable. The results lead to some insights into the design of cushioning packaging.
Motion Coupling Analysis for the Nose and Body of the Deflectable Nose Missile
Authors: Wang Xu Gang , Jing Qin
Published: July 2011

The chief aim of the present study is to find the effect of the nose motion upon the main body of the deflectable nose missile. The dynamic model including the motions of the nose and main body is built. The dynamic simulation and analysis show the interferential moment of the nose and main body can cause disadvantageous “body flutter”. The coupling motions can be decreased through lightening the weight of the nose. The coupling motion can be decreased greatly when the point of hinge、mass center the nose are set on one place. The roll increases the motion coupling of the three channels of the missile.
Aerodynamic Character Analysis for the Deflectable Nose Missile
Authors: Wang Xu Gang , Jing Qin
Published: July 2011

Using the wind tunnel experimental data, the main aerodynamic coefficients are select, computed and analyzed for vehicles with deflectable nose and canard controls during different trim conditions. By analyzing the difference between aerodynamic coefficient of the two vehicle, the deflectable nose control offers increased control effectiveness 、maneuverability and stability ,reduces the aerodynamic drag. The performance of vehicle is enhanced with the deflectable nose control.
Design UCAV Flight Control Law Based on Jamming Observer
Authors: Du Hai Wen , Weng Xing Wei , Fu Yu Song , Tang Chuan Lin
Published: July 2011

In order to study the nonlinear jamming problem in UCAV’s flight control system, a method of using observer to check the system’s jamming was designed, constructed robust dynamic inversion control law based on jamming observer. The simulation results show that the robust dynamic inversion control law based on jamming observer, make UCAV’s flight control system have good stability and robustness, it’s a great convenience analyzing the system stability.
Flow and Heat Transfer Characteristics in a Channel Periodically Fitted with Blocks and Inclined Plates
Authors: Wang Jian Sheng , Wu Cui
Published: July 2011

A numerical investigation in the CFD method of the heat transfer characteristics and the self-sustained oscillation flow is conducted in a grooved channel with periodic mounted inclined plate.Control of low Reynolds number range(600-1600), two-dimensional, unsteady laminar flow was analyzed .Various physical and flow arrangements have been considered as plate length, plate position and Reynolds number .A comparison among different channels was made for streamlines、history of cartesian velocity component in the x-direction and Nusselt number(Nu)．Compared with the results got by the no plates case, the heat transfer has been enhanced in channel that installation of a inlined plate for all Reynolds number.At higher Reynolds number(Reynolds number over the critical Reynolds number), the enhancement of heat transfer is more marked ,that because it can not only modify the direction of the flow towards the obstacle faces to be cooled ,and activate the self-oscillations using inclined plates placed periodically.
Study on Static Wind Loading Coefficients of Suspension Bridge Based on CFD Simulation and Wind Tunnel Test
Authors: Yu Mei , Liao Hai Li , Li Ming Shui , Ma Cun Ming , Luo Nan , Liu Ming
Published: July 2011

Long-span suspension bridges, due to their flexibility and lightness, are much prone to the wind loads, aerodynamics performance has become an important aspect of the design of long-span suspension bridges. In this study, the static wind load acting on the suspension bridge during erection has been investigated through wind tunnel test and numerical analysis. The wind tunnel test was performed using a 1:50 scale section model of the bridge, the static wind load acting on the section model was measured with varying attack angles. Numerical method used here was computational fluid dynamics simulation, a two-dimensional model is adopted in the first stage of the analysis, then the SIMPLE algorithm was employed to solve the governing equations. The analytical results were compared with the wind tunnel test data, it was shown from the study that the results of CFD simulation was good agreement with that of the wind tunnel test.
Analysis of Multi-Pylon Cable-Stayed Bridges with Intersecting Cables
Authors: Yu Mei , Liao Hai Li , Li Qiao , Ma Cun Ming , Liu Ming
Published: July 2011

For the intermediate pylons of multi-pylon cable-stayed bridges can’t be connected by backstays to fixed points, it is possible to produce greater horizontal displacements in the top of towers under the action of external loads. Therefore, it is an important problem to obtain adequate structural stiffness in the design of multi-pylon cable-stayed bridges. In this paper, methods of improving stiffness of multi-pylon cable-stayed bridges are discussed. Multi-pylon cable-stayed bridges with intersecting cable are studied. Some useful recommendations were given for the design of multi-pylon cable- stayed bridges by numerical calculation.
A Fuzzy Sliding Mode Controller for an Air Spring Active Suspension
Authors: Bao Wei Ning , Zhang Xiao Hong , Zhao Yong Sheng , Zhang Yun Qing
Published: July 2011

Due to nonlinearity, preload-dependent spring force and parameters uncertainty in air spring, it is difficult to control this suspension system. To achieve a desired performance, a fuzzy sliding mode controller (FSMC) has been designed to improve the passenger comfort and manipulability of vehicle, in which the fuzzy adaptive system is used to deal with the nonlinearity and uncertainty of the air suspension. A normal linear suspension model with an optimal state feedback control is designed as the reference model. The simulation results show that this control scheme is more effective and robust in the vibration isolation of the vehicle body than is the conventional sliding mode controller (CSMC).
Steady Configuration of the High Speed Belt
Authors: Han Feng Lin , Xiong Feng , He Rui Bo
Published: July 2011

To improve the calculation accuracy of the wrap angles, which are key parameters for the estimation of the maximum torque of the belt system, the steady configuration of the belt was researched. The governing equations and boundary conditions of the belt steady configuration were proposed and the following factors were considered in the model: the centrifugal force, the bending stiffness and the gravity of the belt. The belt steady configuration can be solved through a proposed iteration method based on the built model. The results show the gravity of the belt plays an important role on the belt steady configuration. The wrap angles calculated from the steady configuration are much less than that from the traditional geometric analysis. Thus the maximum torque of the belt system could be overestimated in the traditional belt design theory. It is necessary to calculate the wrap angles by solving the belt steady configuration, especially for the long center distance, high speed belt system.
Effect of Temperature on Induction Heating Deposited Monetite Coating on H2O2-Treated C/C Composites Treated by Alkaline Hydrothermal Method
Authors: Xiong Xin Bo , Chu Cen Cen , Huang Jian Feng
Published: July 2011

The effect of alkaline hydrothermal temperature on the transformation of induction heating deposited monetite coatings to hydroxyapatite coatings on the H2O2treated C/C composite was investigated. These monetite coatings were hydrothermally treated for 4h at 353K, 373K and 393K in a 50ml autoclave with 0.1M alkaline solution. After hydrothermal post-treatment, the structure, morphology and the chemical composition of these HA coatings were characterized with XRD, FTIR, SEM and EDS. A scratch test was conducted to measure the strength of the adhesion of the coatings to the HT-C/C substrate. The results showed that only part of hydroxyapatite phases at 393K could be transformed from the monetite coatings on HT-C/C substrate, while pure hydroxyapatite phases were observed to form in the as-converted coatings with critical loads of 45.9N and 51.1N respectively when the alkaline hydrothermal post-treatment treating temperatures were 353K and 373K. The reasons for these results were suggested.
Deicing Excitation Simulation and Structural Dynamic Analysis of the Electro-Impulse Deicing System
Authors: Li Qing Ying , Bai Tian , Zhu Chun Ling
Published: July 2011

A two-dimensional electromagnetic eddy current field analysis model of the experimental electro-impulse deicing system (EIDI) is developed. Additionally, a numerical post-processing method is proposed to calculate the deicing excitation exerting on the testing skin. Moreover, a three-dimensional dynamic analysis finite element model of the testing skin loaded the excitation is built for evaluating the response accelerations. Then, the calculated accelerations are compared with the experimental measured data to validate the correctness of the proposed methods. It is obtained that the results agree well, which indicates that it is feasible to use the method of post-processing pressure distribution for solving the deicing excitation and the method of structural dynamic finite element analyzing the testing skin for simulating dynamic response. The presented methods pave a way for ice failure analysis of the EIDI system.
The System Simulation Assessment Research on the Supply Chain Performance of the Aviation Weapon Equipment Manufacturing
Authors: Jia Wei Qiang , Huang You Fang , Wang Yun Zhu
Published: July 2011

Based on the Rate-Variable Fundamental In-tree Modeling Method of the System Dynamics, this paper discusses a problem that how to apply the system dynamics assessment Method based on Level and Rate Variable System in a determined Assessment Index System. It gives a method to determine the Level Variable and Rate Variable System method in the Assessment Index System, and then utilizes Rate-Variable Fundamental In-tree Models depicting the Assessment Index System. Based on this, it applies the System Simulation Assessment on the Supply Chain Performance of the Aviation Weapon Equipment Manufacturing, analyses the feedback dynamic complexity affecting the performance improvement; put forward the relevant Management Countermeasures, which achieves the purpose of analyzing Supply Chain Performance effectively utilizing the System Science Method.
Propagation of Lamb Waves in a Pre-Stressed Plate
Authors: Liu Jie , Zhou Jin Xiong
Published: July 2011

A novel approach is presented to solve the propagation of Lamb wave in a pre-stressed plate with finite thickness, where the commonly used Helmholtz decomposition method fails to find the solution. By using the proposed approach, some important relations of Lamb wave such as the dispersion relation can be obtained and analyzed in closed form, and the effects of initial stress are discussed in details. The method presented herein can be developed further to study the mechanical behaviors of other surface wave acoustic devices.
Constructing the Sustainable Operation Mechanism of School-Enterprise Training Mode in China
Authors: Xie Xiao Qing , Li Guan Nan
Published: July 2011

The school-enterprise cooperation is an important way to train highly-skilled personnel, improve independent innovation capacity. This paper based on the research of the current school-enterprise cooperation mode and its obstacles, analysing the operation mechanism of this mode, and thus proposing a rational choice of sustainable operational mechanism for building a school-enterprise cooperation mode of training high-skilled talents.
Creative Design Based on Mechanism Regeneration of a Sofa Bed
Authors: Xu Shi Fu , Zhang Lei , Zhang Lu
Published: July 2011

Creative design plays a quite important role in mechanical product processing, which affects the mechanical development of all over the country. Much research on the mechanical design is carried on. The paper is mainly based on Yan’s Creative Mechanism Design Methodology, in which the author carries out some research in Type Synthesis based on the Number Synthesis Method. And kinematic chains of eight links and ten joints can be gained from embryo graphs. In the article, the author proposes a systematic method for the creation of a sofa bed. In the process, some rules are brought in, and the original structure is changed for other structures with the same functions but different shapes. At last, many probable schemes different from the original mechanism are obtained. The next step is to choose the most proper scheme in order to carry on the further analysis.
Research of Fan System Identification Based on Improved Bayes Algorithm
Authors: Wang Hai Tao , Zhang Ze
Published: July 2011

In every filed of natural science, more and more researchers attach importance to system quantitative analysis, control and prediction. In filed of automatic control, system identification is the extension of system dynamic characteristics testing. System modeling is the basis of system identification, non-parametric model can be obtained by means of dynamic characteristics testing, but parametric model must be established by means of parameter estimation algorithm, which is more prevalent than dynamic characteristics testing. Coal power plant produces more gas and dust, so how to control the fan system plays a very important role in environment protection. We must clarify the parameter of fan system before controlling it. The traditional Bayes identification algorithm is used widely in research and industry, and the effect is relatively good. The paper induces the concept of loss function based on traditional Bayes identification algorithm, and proposes an improved Bayes identification algorithm, which can be applied to fan system identification successfully.
Oxidation Effect on Welded AA6061 Al Alloy Using ER4043 Filler Metal
Authors: Nur Azida Che Lah , Jalar Azman , Othman Norinsan Kamil , Daud Abdul Razak
Published: July 2011

As-welded AA6061 Al alloy using Al-Si-Mg (ER 4043) filler metal was subjected to oxidationexposure in flowing air gas for 40hrs at 600oC at a total pressure of approximately 1 atm. SEM andEDAX were chosen to characterize the morphology microstructure of oxide formation on welded jointafter oxidation process. Different oxide morphology were found on parent and fusion metal due to thedifferences of the alloying element. The morphology of the oxide shows the protection oxide surfacewere developed on parent metal while non-protective oxide formed on fusion metal.
The Dynamic Simulation of Stage Filling Mining Method
Authors: Wang Guo Fu , Deng Peng , Zhang Chao Fan , Zhang Fa Quan , Ye Jin Cai
Published: July 2011

The method of stage filling mining is introduced in this paper. In order to control the shaft of overburden movement and protect auxiliary shaft, four ore mining plans are proposed for YOUJIANG Mining. The simulation models are established. The powerful numerical ability of ANSYS is used to the reliability of four ore mining plan. The results show that: None of the four plan cause auxiliary shaft rock failure. The first plan is minimum stress in all directions. So it is optimal mining plan. A theoretical basis is provided for actual mining.
Air Compressor Wear Condition Monitoring Based on Oil Analysis Technology
Authors: Jiang Xu Feng , Qiu Zhen Hui , Zong Ying
Published: July 2011

In order to verify the effectiveness of oil analysis technology on air compressor condition monitoring, oil samples are taken from lubricating system of D-100/8 type air compressor for monitoring by comprehensively using atomic emission spectroscopic analysis technology and ferrographic analysis technology. The result shows that the atomic emission spectroscopic analysis can comprehensively monitor content of additives, contaminants and wear metals in oil products. The effective analysis range of emission spectroscopy is particles with size smaller than 8~10μm and it fails to measure large-size wear particles produced from heavy wear of the equipment. However, the ferrographic analysis can further confirm wear condition of the equipment according to size, shape, material and superheated degree of particles, which just makes up the shortage. Thus, the combination of atomic emission spectroscopic analysis and ferrographic analysis is quite necessary for monitoring contamination and wear condition of lubricating oil products of air compressor and preventing sudden failure of machinery.
CFD Analysis of Static Pressure on the Casing of Taker-In in Carding Machine
Authors: Han Xian Guo , Sun Peng Zi , Zhao Ye Ping , Cao Ji Peng
Published: July 2011

This paper gives a model of using CFD to calculate the airflow between taker-in and its casing in the A186 carding machine for researching static pressure of the airflow with FLUENT software. The model analyzes the static pressure in the casing of taker-in under the condition of the different rotation speeds of taker-in and cylinder and two gauges in air inlet of the casing. The numerical calculation of the model shows that the rotation speed of taker-in and cylinder has an obvious influence on the static pressure of the casing, of which the effect of rotation speed of taker-in is larger than that of cylinder, and the static pressure increases gradually from air inlet to outlet between taker-in and its casing. Furthermore, the calculation results confirm that while the gauge of the air inlet diminish, the static pressure of the air inlet decreases but that of the air outlet has little change. The calculation result of the model has a good agreement with the conclusion of previous study with the experimental method.
Effect of Porosity on Tensile Behaviour of Welded AA6061-T6 Aluminium Alloy
Authors: Ibrahim Muhammad Faizol Ahmad , Bakar S.R.S. , Jalar A. , Othman Norinsan Kamil , Sharif J. , Daud A. R. , Rashdi N. M.
Published: July 2011

Effect of porosity distribution in the weld metal of AA 6061-T6 with 6 mm thickness plate using two dissimilar filler metals in the gas metal arc welding (GMAW) process was investigated. This paper provides a characterization of the porosity in term of the distribution, location and size of the pores in the weldment region. The porosity characterization was made by using 3D X-Ray Computed Tomography and Scanning Electron microscope. The existing pores resulting from the cause of the filler metal in welded alloy used ER4043 (Al-5Si) was compared with the weldement used ER5356 (Al-5Mg). From this investigation, it is exhibited that the pores only distributed and located mainly at the edges and at the root of the weldment with ER5356 weld metal, however, for weldment with ER4043, the pores were mainly scattered in the centre region. The distribution and location of pores in weld metal is believed due to the effect of convections in the molten metal, solidification rate and also from the gases induced during the weld process. Apart from that, results of tensile test indicated the weldment has affected the strength and ductility of the two different fillers selected. AA6061 with ER5356 are dropped 50% in ultimate tensile strength (UTS) and 40 % in elongation; meanwhile AA6061 with ER 4043 was dropped 70% in UTS and 90% in elongation. The different principle alloying element of these two filler metals have play significant role in the distribution of porosity in AA6061 weldment and had influence the strength and ductility of the weld joint.
Forming of Corrosion Inhibitor Film during Turbulent Flow
Authors: Musa Ahmed Y. , Kadhum Abdul Amir H. , Mohamad Abu Bakar , Takriff Mohd Sobri
Published: July 2011

The organic material named 4-amino-5-phenyl-4H-1, 2, 4-trizole-3-thiol (APTT) was studied as inhibitor for mild steel corrosion in 1.0 M HCl at 30 °C. The effects of turbulent flow on the inhibition process were characterized using open circuit potential (OCP), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Turbulent flow condition experiments were simulated by Rotating Cylinder Electrode (RCE). Results obtained from changes of open circuit potential (OCP) with immersion time, potentiodynamic polarization, and impedance measurements all are in good agreement and indicated that the formation and the development of the inhibitor film were flow rate dependence. The scanning electron micrograph confirmed film structure is dependence of flow condition.
Study on the Electromagnetic Environment of the Inner and Outer Fuselage and the Hazard of the Environment to Electro-Explosive Systems
Authors: Wang Yao Hua , Wang Liang , Zhu Bao Guo , Yang Hai Shan
Published: July 2011

To meet the air emergency evacuation needs of aircraft flight test team members, we developed the air emergency opening system of aircraft service port. During the flight tests, the probability of false triggering of the electro-explosive system used in the emergency opening system is called for not more than 0.001 in the confidence of not less than 90% under the interference of external electromagnetic radiation, and when the aircraft experience an emergency, the electro-explosive system can work reliably according to the preestablished instructions to detonate the detonation power unit of the emergency opening system, and the service port will be pushed into the cabin fast and accurately, so that the aircrew could bail out of the aircraft by the barrier-free access. Therefore, this paper examines the electromagnetic radiation environment of the inner and outer fuselage of the aircraft, and then analyzes the hazard of the electromagnetic environment to the electro-explosive system of the emergency opening system as a base for the safety design of the anti-electromagnetic radiation of the emergency opening system.
Modeling Traffic Volume Based on Highway Toll Database Using GM (1,1)
Authors: An Yi Sheng , Cui Hua , Wei Shan Guan , Zhao Xiang Mo
Published: July 2011

To circumvent the poor prediction accuracy of traffic volume models available due to the lack of traffic data and inaccurate judgments on the traffic influence factors, in this paper we established a traffic volume prediction model using grey forecasting model GM(1,1) based on the real traffic data from the highway toll database. The GM(1,1) method has advantage of the strong adaptiveness to Complex system, thus getting a great advantage over other methods for modeling such a complex nonlinear traffic volume system with many uncertain influence factors. Simulation results show that our GM(1,1) model has mean relative prediction error of 3.9%, which accomplishes our intended prediction accuracy.
Surface Cracking and Degradation of Dense Hydroxyapatite through Vickers Microindentation Testing
Authors: Behnamghader Aliasghar , Shirazi Reyhaneh Neghabat , Iost Alain , Najjar Denis
Published: July 2011

Surface degradation and cracking of dense hydroxyapatite were evaluated through Vickers micro indentation using indentation loads ranged from 25 gf to 2000 gf. Crack lengths, imprint diameters and the number of lateral cracks and chips were measured using SEM. The crack length-indentation load data were analyzed with regard to the specific relations of Palmqvist and fully developed radial cracks. Crack type transition load from Palmqvist to median crack was experimentally assessed through serial sectioning technique. The analytical estimated transition load, based on the theoretical relation of the indentation load and crack lengths showed a good agreement with one obtained from experimental itinerary. Palmqvist and median cracks were identified in low and medium indentation loads, respectively. High indentation load could also lead to the formation of lateral cracks and chips. The tendency for lateral cracking was evaluated taking into account the number of lateral cracks and chips. The chips were found to be appeared just after test in higher indentation load, whereas in medium loads they could be detectable only after several weeks.