bluuebunny/crossref_metadata_2025 huggingface dataset:
PID Neural Network Smith Predictive Control for a Control System with Time Delay
Authors: Yang Zhi Gang , Qian Jun Lei
Published: March 2013

According to the time delay in industrial control objects, the PID neural network control method and Smith predictor compensation principle are combined to form the PIDNN-Smith control algorithm. Namely, in Smith predictor compensation control system, the PIDNN as the controller, using the PIDNN neural network on-line self-learning function to tune weight value, make the implicit layers of proportion, integral and differential neurons to achieve the best combination, thus overcome disadvantages of the conventional PID algorithm that does not adapt to the control of large delay system and conventional Smith algorithm depended too much on model precision of the defect. Simulation results show strong robustness and good control quality of this algorithm.
Robust Backstepping Control for Longitudinal Flight Dynamics
Authors: Li Ming Suo , Chen Mou , Mei Rong
Published: March 2013

In this paper, the robust longitudinal flight control is developed for the fighter using the backstepping technique. To improve the robust control performance for the unknown external disturbance, the sliding mode disturbance observer is employed to estimate the unknown external disturbance. Utilizing the disturbance estimate output, the robust backstepping flight control scheme is proposed for the fighter with the unknown external disturbance. Finally, simulation results are given to show the effectiveness of the proposed robust flight control scheme for longitudinal flight dynamics.
Receding Horizon Control on Automatic Landing Lateral Loop of Carrier-Based Aircraft
Authors: Jiang Xing Wei , Zhu Qi Dan , Wen Zi Xia
Published: March 2013

Since the angled deck is only tens miles width, the task of landing an aircraft on an aircraft carrier requires precise control, especially lateral loop. For this problem, this paper focuses on researching the aircraft automatic landing lateral control. In lateral control, the most crucial parts are controlling the off center distance and keeping the desired landing attitude. So firstly a nonlinear kinetic model of aircraft landing in lateral directional axis is established, and then transformed into error states. The controller is designed for an angle of attack of 11.7 deg and an airspeed of 40m/s, the equilibrium point. Receding horizon control methodology is employed to solve the aircraft lateral control problem. This controller is solved in MATLAB, and sent to the 3D simulation environment by network communication, to control the aircraft landing lateral loop. The simulation environment is programmed based on VC++ software. The simulation results show that receding horizon control method can achieve trajectory tracking and attitude tracking of nonlinear aircraft landing system.
The Effects of Production Performance Model and Competitive Environment of Hospital Systems
Authors: Wei Ching Kuo
Published: March 2013

This study investigated the efficiency performance of the production technology of the Department of Health (DOH)-affiliated hospital system in Taiwan in different competitive environments. This study used Data Envelopment Analysis (DEA) to analyze a total of 396 hospitals of different systems in Taiwan. The results indicated that, in terms of the internal competitive environment, the production performance of hospital Q was the best, while that of hospital N was the worst. This study also analyzed the production performance and scale of DOH-affiliated hospitals and provided hospitals with a direction for scale development. Finally, this study proposed suggestions on improvement direction for hospitals with poor production performance. As for external competitive environment, there is no significant difference in the average efficiency among various hospital systems. However, there are a lot to be improved in DOH-affiliated hospitals, especially in the aspect of technology efficiency. The improvement of technology efficiency should be more beneficial to the overall efficiency.
Computer Simulation for New Theoretical Model Constructed with Tuberculosis
Authors: Chung Chun Yen , Chung Hung Yuan
Published: March 2013

In order to simulate the transmissions of vector-borne diseases and discuss the related health policies effects on vector-borne diseases, we using compartmental model to develop an epidemic simulation models. The research will analyze the complex dynamic mathematic model of tuberculosis epidemic and determine its stability property by using the popular Matlab/Simulink software and relative software packages. Facing the current TB epidemic situation, the development of TB and its developing trend through constructing a dynamic bio-mathematic system model of TB is investigated.
Audio-Video Synchronization Method Based on Playback Time
Authors: Fu Jia Bing , Yu He Wei
Published: March 2013

This paper proposes an audio and video synchronization method based on playback time. In ordinary playing process, the playback rate of audio is constant, so we can locate the playback time of audio and video by locating the key frame to get synchronization. Experimental results show that this method can get synchronization between audio and video and be achieved simply, furthermore, it can reduce the system overhead for synchronization.
Experimental Research on Parameters Identification of Dynamic Characteristic for Parallel Machine Tool
Authors: Zhu Chun Xia , Chen Zhi Wen , Liu Bo , Wang Jing
Published: March 2013

The dynamic characteristics of parallel 3-TPT machine tool are researched by experiment in this paper. Firstly, modal analysis principle of machine tool was analyzed in theory, and the parameters of dynamic characteristic were identified by theoretical analysis. Then vibration model of parallel machine tool was built and formed vibration system of rigid and flexible coupling for analysis. Then, the modal experiment method and steps were introduced, and the experiment parameters also were identified according to the experiment results. The result dates are showed that the result dates are validated. So the experiment method is feasible by experimental verification, which provides reference for dynamic optimal design.
Optimal Channel Choice under Stochastic Demand with Multiplicative and Additive Shocks
Authors: Ding Jia Li , Liu Xiang Dong
Published: March 2013

Based on the framework of Stackelberg game, we analyze and compare the optimal channel choices for the manufacturer and the retailer under consignment contract, when the demand is stochastic with uniformly distributed shock in multiplicative and additive forms respectively. We find that the price elasticity, range of demand fluctuation and the revenue sharing ratio affect the optimal channel choices for the manufacturer and the retailer differently under different forms of stochastic demand shocks.
Analysis on Milling Force Based on AdvantEdge FEM
Authors: Sui Xiu Lin , Yang Ru , Wang Qian , Zhao Xin Ling
Published: March 2013

Aiming at NC milling processing simulation problem, a ball-end cutter milling force model is established, the numerical simulation analysis of aluminum alloy AL2024 milling process is conducted by using the finite element analysis software AdvantEdge FEM. Focus on the Milling force simulation, the size of the milling force is obtained by simulating calculation. Using the same cutting parameters for milling experiment, the results show that simulation analysis of the cutting force values are in good agreement with the experimental results，the milling force model prior established is correct. The research laid a foundation for the perfect CNC milling simulation system.
Discussion on Modeling Approach of 3-Dimensional Models Based on Web3D
Authors: Yang Xiao Ping , Hu Wei Ping , Wang Jing Jing
Published: March 2013

Web3D can be understood as 3D model displaying for the Internet browser. In the regard of Web3D technology, to name a few, modeling of 3D models, texture mapping of 3D models, interactive design will pose influence on the final on-line displaying. The paper discusses feasibility of Web3D technology development from modeling methods for Web3D models.
Simulation Research on Vibration of Valve Mechanism for Diesel Engine Based on AMESim
Authors: Ding Ji Bin
Published: March 2013

The double mass model of valve mechanism for type 16 VPA6STC diesel engine is established in this paper. The results of vibration characteristic simulation analysis based on AMESim show that the valve mechanism has rich nonlinear vibration characteristics. The kinematic and dynamic characteristics of the simulation model for the valve mechanism provide the reference for evaluation various performance of the valve mechanism comprehensively and systematically.
Simulation of Deployment Process of Junction Box
Authors: Xia Fan Yi , Li De Jun , Zhang Ji Yuan
Published: March 2013

Junction box is an important part of cabled seafloor observatory. And it should be deployed to correct position safely, smoothly and precisely. A model of virtual prototype simulation is put forward in this paper to analyze the dynamic characteristics of the deployment process in Marine Environment. The analysis is focus on the influence of different sea condition and different vibrating movement of ship caused by the wave, as well as the some important deploying parameters during the deployment process. The preliminary results of the simulation with ADAMS software provides scientific support for deployment system designers and operators to refer to.
Design of Hybrid Electric Bus on Regenerative Braking System
Authors: Chen Jue Jiang , Zhou Ling Xiao , Ning Xiao Bin , Zhao Cui Ling
Published: March 2013

In order to improve efficiency of Electro-Hydraulic regenerative braking system on electric bus, this paper will analysis dynamic performance and typical driving condition of electric bus based on ADAMS to establish electric bus simulation model and AMEsim to built hydraulic regenerative braking system simulation model. After simulation, displacement of Pump, volume and working pressure of accumulator, ratio of driving coupler will be optimized. The acceleration performance of electric bus will be enhanced obviously after applying hydraulic regenerative braking system.
Digital Closed Loop Fiber-Optic Current Sensor Based on Integrated Optical Phase Modulator
Authors: Wang Xia Xiao , Wang Xi Chen , Feng Xiu Juan
Published: March 2013

The paper presents digital closed loop fiber-optic current sensor (FOCT)’s optical path which combines integrated optical modulator and polarization beam splitter as optimum combination, as well as numerical analysis on insertion loss of traditional optical path scheme which consists of straight waveguide and optical path proposed by ABB. It shows that loss causes equivalent noise current which will affect the sensitivity of photo detector. The calculation and experiment confirm that loss of optical path is an important factor for FOCT’s sensitivity, and optical path composed of integrated optical phase modulator with Y-Branch profile and polarization beam splitter can effectively reduce the insertion loss and improve sensitivity of the system.
Development of Intelligent Fire Detection Module Using Optic-Sensors
Authors: Lin Yung Chin , Su Kuo Lan , Chung Cheng Yun
Published: March 2013

The paper proposes an adaptive fusion algorithm using competitiveness sensors for fire detection module, and uses computer simulation results to select the optimal weight values for each optic-sensor. Then we design the fire detection module using the tuned weight values of optic-sensors. The competitiveness flame sensor type is ultra-violet sensor (R2868). The controller of the module is HOLTEK microchip, and acquires the detection signals from the optic-sensors through I/O pins, and transmits the detection signals of all sensors to the computer via wire series interface. The adaptive fusion algorithm can tunes weight values according to decision output of the fusion center. The fusion algorithms of the fusion center use Bayesian estimated method to decide the fire event to be true or not. We set the improved weight values in the module for each optic-sensor. From the simulation and experimental implementation results, it demonstrates that the proposed algorithms can compute the adequate weight values.
Lower Distortion in Trajectory Planning for a Rigid-Flexible Manipulator Based on PSO Algorithm
Authors: Yin Hai Bin , Jiang Ni Cong , Xu Jin Li , Huang Feng Yun
Published: March 2013

This paper presents a novel trajectory planning for a multilink rigid-flexible manipulator. An original trajectory is given according to the site condition and requirement of motion, and desired trajectory is determined by using an optimization. To satisfy the requirement of motion with restrictions, the desired trajectory cannot significantly deviate from the original trajectory. Consequently, the lower distortion in trajectory planning should be considered in optimization algorithm. Two different formulations of trajectory are introduced in two optimization algorithms to compare the distortion degree. Finally, the calculation samples are addressed by using specific site conditions and requirements of motion to verify the validity of proposal.
Analysis of Underwater Wet Welding Seam Forming Based on Arc Sensor Information
Authors: Chen Bo , Zhang Hong Tao , Feng Ji Cai
Published: March 2013

It is difficult to obtain fine weld seam of underwater welding because of the water environment, this paper used arc sensor to obtain electrical information of the under water wet welding process, and BP neural network was used to model the process, experiment results showed the model could predict the process precisely, this laid the foundation for further controlling the welding quality automatically.
Fast and Accurate Event Detection Based on Wireless Sensor Networks Using Fuzzy Logic Method
Authors: Sung Wen Tsai , Chen Jui Ho
Published: March 2013

Wireless Sensor Networks have recently been used for environmental monitoring and real time event detection because of their low implementation costs and distributed sensing and processing capabilities. Event detection is a critical issue in wireless sensor networks. Fire detection is used as an example in our event detection system. Algorithms are required to detect fire sensors and measure the environmental parameters (temperature, humidity, light intensity, and Carbon Monoxide) to determine if a fire is present or not. It is urgent to research fire detection techniques that are efficient, convenient and practical. Although there are several works on fire detection using WSNs, sufficient attention has rarely been paid to using fuzzy logic methods. We present a novel approach based on fuzzy logic for multi-sensors data fusion in a wireless sensor network system with a node-sink mobile network structure to detect fire. Through simulation results, it is shown that the proposed innovative fuzzy logic algorithm can improve the reliability and accuracy of sensed information and reduce the rate of false alarm.
An On-Line Monitoring System of Temperature Field in Tire
Authors: Li Deng Chao , Wang Jian Hua , Yang Yong Sheng
Published: March 2013

The internal high temperature of tire not only reduces the service life of the tire, but also increases fuel consumption. An on-line monitoring system of temperature field in tire is designed. The temperature measurement module of lower computer is made up of temperature measurement network of thermocouple, single chip microcomputer and other modules. The upper computer software is designed under the environment of VC ++, making use of the serial port to realize communication. The functions such as temperature collection, analysis, display and storage capabilities were realized. The system has the advantages of convenient use, reliable operation, solving the difficult problem of obtaining tire actual temperature.
Implementation of Sun Tracking for Solar Cell with Maximum Power Point Tracking
Authors: Chen Sheng , Chen Chih Chen
Published: March 2013

In this paper, the implement of the solar cell for sun tracking is achieved. The sun energy is abundant with clean and green energy, but the efficiency is not benefit from the source of solar panel to the power conversion output for the practical application. This paper contains the implement starting from driving solar cell with the XY-axis servo motor to trace the optimal input solar light, then the maximum power point tracking circuit (MPPT) in the Boost conversion is included to increase the efficiency for lithium battery charging. The super capacitor banks are paralleled with the lithium battery to improve the inrush power load, which is benefit for prolong the lithium battery and solar panel life; The applications of output are included two parts; one is the small green man of traffic light and the other one is AC 110V urban electric conversion; the control core for this system is PSOC chip for its simple, practical and high efficiency demand.
Battlefield Awareness Network Research Based on Intelligence Role Division and Wireless Sensor Network
Authors: Li Tian , Liu Peng Yuan , Ke Yong
Published: March 2013

This article mainly describes battlefield awareness network scheme based on distributed artificial intelligence theory and intelligence wireless sensor network technology. Critical technologies are discussed, such as role-divided wireless sensor group, mission decision based on intelligence cooperation and performance optimization for battlefield circumstance. The research takes on advanced theory significance and operable technical application foreground.
Comprehensive Evaluation of Regional Grid Development Level of China under the Smart Grid Construction
Authors: Niu Dong Xiao , Liu Jin Peng , Liu Tong , Guo Hao Chi
Published: March 2013

The construction engineering of smart grid is the key plan for the electricity grid development of China. To build a strong smart grid has been the main goal for the development of regional grid, thus, it is of great significance to study on the smartness level of regional grid. This paper establishes a comprehensive evaluation system for the regional grid development level; analyzes from aspects of safety, economy, quality, and efficiency. A hierarchical optimized combination evaluation model is proposed, and its progressiveness and applicability are verified. The study provides theoretical basis and practical evidence for judging the development level of regional smart grid construction of China from an overall and multi-angle perspective.
A Mixed-Integer Memetic Algorithm Applied to Batch Process Optimization
Authors: Lin Yung Chien
Published: March 2013

Evolutionary algorithms (EAs) are population-based global search methods. Memetic Algorithms (MAs) are hybrid EAs that combine genetic operators with local search methods. With global exploration and local exploitation in search space, MAs are capable of obtaining more high-quality solutions. On the other hand, mixed-integer hybrid differential evolution (MIHDE), as an EA-based search algorithm, has been successfully applied to many mixed-integer optimization problems. In this paper, a mixed-integer memetic algorithm based on MIHDE is developed for solving mixed-integer constrained optimization problems. The proposed algorithm is implemented and applied to the optimal design of batch processes. Experimental results show that the proposed algorithm can find a better optimal solution compared with some other search algorithms.
A Method to Ascertain Parameters of Samples and their Feature Weights in the Weighted Fuzzy Clustering
Authors: Wen Wu Di , Liu Zhong Le , Li Hua
Published: March 2013

The reasonable definitions of samples and their feature weights in weighted fuzzy clustering algorithm based on the thought of normalization and each computational formula are presented. Banding together with computational formulas of samples and their feature weights which derived in weighted FCM, we can get the regions of sample’s weight parameter() and sample feature’s weight parameter(). Then divide the regions into intervals, point out the clustering situations in different intervals and how changing of and affect the clustering result and the choice of feature.Try to explore the relationship between weightd parameter(、) and fuzzy constant(m). Finally, test result demonstrates the validity of the regions of parameter and its partition.
The Web Service Framework for SaaS in Cloud Computing Environment
Authors: Jeong Hwa Young , Choi Hae Gill
Published: March 2013

Software is also an integral part of other major ICT (information communication technology) equipment and devices, such as hardware, network, end-user communications equipment and carrier services. Recently software area has changing their using method from traditional ways to providing their process as a service. That is web service based SaaS in cloud computing. In this research, we consider the framework to process web service on SaaS, cloud computing environment. For this process, the framework has service search agent, service management mediator, UDDI server and web service inform.
Porting RT-Thread to Cortex-M3 Processor
Authors: Sun Yu Sheng , Gui Bo
Published: March 2013

Based on the analysis of the characteristics of the RT-Thread and Cortex-M3, show the superiority of the combination of the two. On the study of RT-Thread and Cortex-M3 system structure and characteristics, RT-Thread is ported to the Cortex-M3 Skillfully. The PendSV exception of Cortex-M3 which can automatic saves part of the registers is used in the process of context switching to reduce the time of thread context switching, and improve the real-time property. This can be as a state-of-the-art design architecture used in intelligent instrument. The system is stable in the practical test, and possessed of popularization and application value.
Simulation Test System of CCD Signal Processor Based on FPGA
Authors: Zhang Da , Liu Dong Bin
Published: March 2013

Simulation test system of CCD signal processor based on FPGA is proposed. Field-programmable gate array (FPGA) is applied as control processing core and used in the aerospace upgrade screening of industrial grade signal processor. The system functional composition and working principle were introduced in detail. Actually evaluation and testing system was completed with integrating the forty signal processor in a single board. The system has been successfully applied in the dynamic build-in screening test of industrial grade signal processor XRD98L63, the system work stably and reliability. Test result is zero on the nonconforming product rate, satisfying the qualification that single batch screening nonconforming rate is less than 5%, build-in screening of industrial grade components for the space load applications is implemented.
A Novel Improved Algorithm of Radial Feature Code Extraction
Authors: Du Yan Rui , Chen Li Hui
Published: March 2013

Based on the conventional radial feature code extraction, this paper proposes a improved algorithm with the polar coordinate origin variable algorithm. Extracted feature with the improved algorithm proposed by this paper is more stable then the feature extracted by calculate the center of gravity for the overall character dot, and thus contribute to the improvement of the recognition rate. It is confirmed that the feature codes obtained with the improved algorithm are better and more stable by programming experiment.
Application of Weighted Projection PM Algorithm in Estimation of DOA
Authors: Hu Wei Wei , Wang Chang Ming , Zhang Ai Jun
Published: March 2013

In order to improve the decreasing resolution ability of Propagator Method (PM) algorithm under the environments like low signal noise ratio and small number of snapshots, a new weighted projection PM algorithm is proposed in this paper. This algorithm orthogonalizes noise subspace to get a new one, gains the signal subspace with the relationship between it and noise subspace, and weights the signal subspace and noise subspace with values gained by projecting integral value of steering vector in the field around the signals to each element of subspace. Simulation results show that the proposed method can keep computation simple, and also can decrease signal noise ratio threshold and snapshots threshold, so it has the better resolution ability and higher precision in snapshot deficient and low signal noise ratio scenario.
The Study of Blockages Effect at Leading Edge on Rectangular Cavity in Subsonic Flow Using Particle Image Velocimetry (PIV)
Authors: Annuar Ahsan Nur Mubarak , Rafie Azmin Shakrine M. , Sultan Mohamed Thariq Hameed
Published: March 2013

In this present paper, laminar cavity flow is analysed at Re = 5.12 x 104 based on cavity length. The experiments were conducted in an open subsonic wind tunnel using Particle Image Velocimetry (PIV). A rectangular cavity with constant depth of 4 cm with length-to-depth ratio of 4 was used. Several types of blockage had been located at the leading edge of cavity and each experiment was performed by acquiring 700 image pairs to filter out the velocity vectors. The results are given in terms of mean velocity profile accordingly and compared thoroughly by dividing cavity into 4 sections. The result had been shown in mean velocity profile in u and v velocity component.
Axial Deformation of Ball Screw Considering Contact Angle
Authors: Liu Lan , He Zhao Xia , Zhang Xiao Cai
Published: March 2013

A mathematic model of ball screw was constructed which was based on the elastic contact deformation theory. The helix angle was considered and the formula of axial elastic deformation was deduced in this study. Furthermore, a finite element model of ball screw was established and its elastic deformation results were also acquired. And the effect of contact angle on axial elastic deformation was analyzed by theoretic method and FEA. The study shows that the axial elastic deformation of ball screw changes with the contact angle. The deformation will decrease by the contact angle increasing, and the positional accuracy of the ball screw is improved.
Thermal Analysis of Heating System in Thermosonic Bonding Process
Authors: Zhang Lu Fan , Li Xue Li , Fang Ji Wen , Cai Jian Dong , Nian Long Sheng , Luo Wei Jun
Published: March 2013

A constant temperature range of the heating system plays an important role in the thermosonic bonding process. Heating block will provide enough heat for the heating system. In the paper, the thermal model of heating block and heating system were calculated by finite element method, and then some important conclusions were obtained. The change of temperature and thermal stress of block with the reference value of x and y was obtained. And an optimal structure of block for right temperature was built. The temperature distribution, thermal displacement and thermal stress distribution of the heating block and heating system were disclosed. The relevant change trends of temperature and thermal stress under the different load of temperature were investigated. These results can help improve the reliability of the heating system used in the thermosonic bonding process.
Symmetrical Dynamic Propagation Problems of Mode III Interface Crack
Authors: Lü Nian Chun , Cheng Yun Hong , Wang Yun Tao
Published: March 2013

By the theory of complex functions, symmetrical dynamic propagation problems of mode Ⅲ interface crack were investigated. The problems considered can be very easily translated into Riemann-Hilbert problem by the methods of self-similar functions, and the universal expressions of analytical solutions for the surfaces of symmetrical mode Ⅲ interface crack subjected to moving alterable loadings Pt3/x3 and Px4/t3 were obtained, respectively. After those solutions were utilized by superposition theorem, the solutions of arbitrary complex problems could be acquired.
Influence of Liquid Paraffins in Crude Oil on the Friction and Wear Behaviors of the Progressing Cavity Pump`s Stator Rubber
Authors: Wang Shi Jie , Lin Hao , Lv Xiao Ren
Published: March 2013

The progressing cavity pump (PCP) always works in the waxy oil well. Therefore the research on the influence of various liquid paraffin contents in crude oil on the friction and wear behaviors of the progressing cavity pump`s stator is very important for choosing the best stator rubber and developing the service life of PCP. Wear behavior of nitrile butadiene rubber (NBR) and fluororubber (FKM) was investigated at room temperature using a reciprocating friction and wear testing machine under the various paraffin contents in crude oil (0%、10%、30%、50%、100%). The wear morphology of blend was analyzed through the stereomicroscope and the wear behavior of two blends was also discussed and compared. The results show that the wear resistance of FKM is better than that of NBR under the same paraffin content in crude oil; With the increase of the paraffin content, the wear and coefficient of friction also increase. When the paraffin content in crude oil is less than 30%, the wear loss of NBR and FKM are basically the same; When the paraffin content in crude oil is more than 30%, the wear loss of NBR is far more than that of FKM.
Developing an Audio News System Based on Android
Authors: Zhong Bo Cheng , Shen Yi Jun
Published: March 2013

With the development of the technology of mobile communication, smartphones have become one of the most popular ways that people get information. However some restrictions such as the screen size, ambient brightness etc. still cause some troubles to read news by smartphones. We based on Android designed an audio news software system by means of the speech synthesis technology which can afford pleasure to listen to information. Using the Andriod technology we developed the smartphone client software which can get the latest information in RSS channels by communicating with the server. Also, it can dynamically manage the RSS channels subscribed by yourself. In the design, we used the techniques of the Android UI framework and component which made the smartphone interface succinct and easy. In order to improve data store efficiency we implemented the data modification and store by transforming between the Json format and the Java object. Based on the iFLY mobile speech platform we developed the audio news player. The function of information automatic acquisition in the server made it possible that smartphones can get the latest information of the subscription channels.
Finite Element Numerical Simulation Computation of Kitchen Units under the Condition of Stacking and Horizontal Controlled Impact
Authors: Sheng Si Lian , Yang Han , Gong Zhan Sheng , Zheng De Zhi , Wang Fei
Published: March 2013

The box-type field kitchen units is used to guarantee the diet in field operations for troops, a set of box-type field kitchen units includes 3 boxes and 1 tent (a kind of rotationally-molding material is applicable to box-type military kitchen equipments), cooking staple and non-staple food for 150 people in one hour. Meanwhile, it can supply 75 or 300 people by modularization. The unit weight of box-type field kitchen units is not exceeding 112KG, which can be loaded on the vehicle by 2-people moving laterally or 3-people lifting. Stacking is done frequently in transit, and always suffered from bump and impact; therefore, the structural strength is the key point of design. ANSYS is applied in this paper to make analysis on finite element structural strength, assist to make design, simulate the load-carrying condition of box under the condition of stacking and horizontal impact, guiding the design and production in the end.
Oxidic Composite for Dental Purposes: Effect of the Laminin 1 Adsorption on Cells Growth
Authors: Faga M.G. , Mussano F. , Carossa S. , Vallée A. , Martra G. , Coluccia S.
Published: March 2013

As major molecules of the basement membrane (BM), laminins are important protein fragments for the epithelial cell adhesion and migration. Since oxidic ceramics are potentially suitable for dental applications, the present paper is focused on the study of laminin interaction with the surface of two alumina-zirconia composites with different percentage in ZrO2, both with submicrometric grain size. Laminin 1 (Ln-1) was adsorbed onto the surface and the interaction was studied via XPS. The cells grown on the laminin-functionalized materials showed good vitality and spreading.
Abrasion Resistance of Alumina-Titanium Dioxid Coating at High Temperature
Authors: Cheng Zhi Fang , Ding Hong Sheng , Rong Hui , Zhao Li Geng
Published: March 2013

Nano-structured and micron Al2O3-13%TiO2 coatings were deposited by air plasma spraying.Wear properties of the coatings under different temperature trough SRV friction and wear testing machine were studied, the results shows that the friction coefficient of nano and micron Al2O3-13%TiO2 coatings both have rising trend.with the temperature increases.The wear volume of micron coating is 1.8-2 times that of the nano coating..The nanometer Al2O3-13%TiO2 coating slide with ZrO2 is still compact and has no large crack after abrasion.
The Limiting Dome Height Tests and Formability of Magnesium Alloy Sheet AZ31B
Authors: Ma Xin Wu , Wang Fang , Zhao Guo Qun
Published: March 2013

The assembly of the limiting dome height tests is developed to evaluate the formability of the magnesium alloy sheet AZ31B. The influence of forming conditions on the formability of AZ31B sheet is investigated by limiting dome height tests. The limiting bulging coefficient is used to represent the formability of AZ31B sheet in the tests. The sheet thickness, forming temperature, punch speed and lubrication are taken as influence factors in the tests. The experimental results show that the sheet of thickness 0.6mm has better formability and the proper forming temperature is about 200~250°C for AZ31B sheet. The low punch speed and good lubrication can also improve the formability of AZ31B sheet.
Composite Anisotropic Conductive Film
Authors: Lin Chao Ming
Published: March 2013

Anisotropic conductive film (ACF), is a lead-free and fine-pitch interconnect materials that is commonly used in liquid crystal display (LCD) manufacturing to make and maintain the electrical and mechanical connections from the driver IC to the substrate. A key issue in the ACF technology is the packaging yield or failure probability, and performance of ACF’s material formula composition. This paper utilizes the V-shaped curve method to analyze the failure probability of composite ACF packages with a smart composition or a functional formula. In the proposed model, the probability of opening failures is modeled using a Poisson function, modified to take into account the average conception on the effective conductive area between opposing pads. Meanwhile, the probability estimation of bridging failures is based on the Box-Strip-Brick model between the neighboring pad pairs in the array. The results show the derived probability formulation can involve the probability conceptions of the composite ACF into a complete evaluation computation.
Finite Element Analysis for the Influence of Nanoparticles on the Thermal Resudual Stressinfiber Reinforced Composite
Authors: Wang Xiao Long , Luo Zhi , Jing Hong Jie , Wu Heng An
Published: March 2013

In the present work, the finite element analysis was employed to study the distribution and level of thermal residual stress generated in matrix reinforced with SO2 nanoparticles. Using Cohesive Element as the bonding of the interface between fiber and matrix, three–dimensional finite element models of periodic cells were established. The results of the models with and without nanoparticles were compared. The residual thermal stressdue to the mismatch of the thermal expansion coefficients between matrix and fibers, especially theshear stress in the interface, decreased with nanoparticles, which could explain the reinforcing mechanism of nanoparticles. Our numerical study can be of great significance in designing new composites with high performance
Temperature Analysis for Circumferential Electric Discharge Milling and Mechanical Grinding Compound Machining of SiC Ceramic
Authors: Ji Ren Jie , Liu Yong Hong , Zheng Chao , Zhang Yan Zhen , Wang Fei
Published: March 2013

Engineering ceramics have been widely employed in the aerospace, automotive and tool field. However, they are difficult to machine due to their high hardness and brittleness. Circumferential electric discharge milling and mechanical grinding compound machining method is employed in this paper. The temperature distribution model for the compound machining of SiC ceramic is established, and the temperature distribution is calculated at different machining conditions. The results show that with the compound machining method, the higher material removal rate can be obtained at rough machining condition, and the better machined surface quality can be obtained at finish machining condition.
Numerical Simulation on Temperature and Stress Field of Multi-Pass Welding of Thin Stainless Steel Plate
Authors: Chen Yue , Han Jian Min , Tan Jun , Du Heng Fang , Wang Jun Qiang
Published: March 2013

Welding parameters have important affect on welding quality. In this paper, temperature field and residual stress field simulation of thin 316L stainless steel plate are performed by finite element method. The welding process is multi-pass butt TIG(Tungsten Inert Gas) welding. Simulation model are established by SYSWELD code with multi-pass bead. A Gaussian heat source representing the arc energy is verified and the temperature distribution in multilayer welding process is simulated. Then the results are compared with test results measured by thermal-couples. Effects of welding speed and interpass cooling time during multi-pass on temperature field and stress field are studied. The results show that the faster the welding speed and the longer the cooling time, the higher the residual stress will be.
Effect of Heat Treatment on the Microstructure and Hardness of a Newly Developed Plastic Injection Mold Steel
Authors: Zeng Yan Ping , Yang Wen
Published: March 2013

The microstructure of a new plastic injection mold steel in the annealed condition and effect of quenching-tempering process on the microstructure and hardness of this steel were investigated by means of OM, SEM, XRD and a digital hardness tester. The microstructure of the annealed steel consisted of ferrite and secondary particles which were identified as a FeCr intermetallic phase based on EDS and XRD analysis. Strong segregation exists in the steel. The microstructures of the quenched steels consisted of fine martensite, a small amount of blocky ferrite and secondary particles except quenching at 1150°C, where the microstructures of the quenched steels consisted of coarse martensite and large number of blocky ferrite. The segregation occurring in the annealed steel can be eliminated completely after heat treatment at the temperatures above 1050°C for 30min. The hardness of the quenched steel continuously increases with quenching temperature up to 1100°C and then drop observably. Hence, the suitable quenching temperature of the steel lies between 1050 and 1100°C. After tempering at 200 and 300°C, the hardness of the steel decreased due to the formation of tempered martensite and increased slightly after tempering at 400 and 500°C owing to secondary hardening, whereas this value decreased markedly after tempering at 600°C due to the formation of tempered sorbite. The amount of secondary particles gradually increased with tempering temperature.
Effect of Grain Size and Annealing Condition on Grain Boundary Segregation of Carbon Atoms in ULC Steel
Authors: Cui Yan , Ji Ai Min , Feng Yun Li , Wang Rui Zhen , Yong Qi Long
Published: March 2013

The grain boundary segregation of carbon atoms is influenced by grain size and annealing condition. Increasing grain size and improving the final cooling ( ＜400 oC) rate can improve the bake hardening property, due to the decreasing of carbon segregation at grain boundaries. Cooling rates have a great effect on bake hardening property of ULC steel with smaller grains
Experimental and Numerical Study on Seismic Performance of Flat Columns under Bilateral Cyclic Loading
Authors: Ma Ze Feng , Lu Zhou Dao , Yu Jiang Tao , Cai Zi Hong
Published: March 2013

In order to research seismic behavior of flat columns under bilateral cyclic loading with different angles, pseudo-static tests are conducted, which includes three 1:2 scaled flat columns. The height-width ratio of the column section is 5. And the loading directions are 00, 250 and 450 respectively. By observation of the test phenomenon and analysis of the data, the seismic performance of the columns including stiffness, skeleton curves, hysteresis curves, ductility and energy dissipation are obtained. Moreover, finite element program ANSYS is employed to simulate the bearing capacity of specimens. The research shows that with the loading angles increasing from 0 to 45, the strength of the flat column decreased gradually, while the ductility and energy dissipation capacity increase, and the failure mode changed from compression-shear to compression-bending. P-Δ effect becomes evident at lager values of loading angle. The compression-shearing curve of flat column complies with a heart-shape curve.
Experimental Study on Bond-Slip Constitutive Relation between CFL and Concrete
Authors: Zheng X.H. , Huang P.Y. , Guo X.Y. , Han Q.
Published: March 2013

Externally bonded reinforcing technique with fiber reinforced polymer (FRP) has been widely used in civil engineering. The performance of the interface between FRP and concrete is one of the key factors affecting the behavior of the strengthened structures. This paper presents a detailed study on the bond-slip mechanism between carbon fiber laminate (CFL) and concrete based on double-shear tests. 8 specimens with different bonded length and width of CFL were tested under static loading. Strain gauges along the CFL face and displacement sensor were used to measure longitudinal strains and slip of the interface. The bond-slip constitutive relation of the interface between CFL and concrete was analyzed with the testing results. Compared with four different bond-slip models, a shear stress-slip model was proposed based on the experimental data.
Modified Friction Stir Channeling: A Novel Technique for Fabrication of Friction Stir Channel
Authors: Rashidi Arash , Mostafapour Amir , Salahi Salar , Rezazadeh Vahid
Published: March 2013

Friction stir channeling (FSC) is a simple method for fabrication of a continuous, integral channel in a monolithic plate, which is carried out in a single pass. The fabricated channels can be applied in heat exchanger industry. In this study, a novel technique was introduced to produce channels in 6061 aluminum alloy which is named as Modified Friction Stir Channeling (MFSC). This technique is derived from Friction stir processing. In this technique, the tool profile and position of tool pin against work piece were designed differently from FSC process. Channels were fabricated with a very regular shape such as rectangular. Comparison between MFSC and FSC showed that fabricated channels, using MFSC process, had better properties relative to fabricated channels by FSC.
Acoustic Transceiver Optimization Analysis for Downhole Sensor Data Telemetry via Drillstring
Authors: Ning Ai Min , Li Cheng , Liu Zhao
Published: March 2013

Downhole sensor data telemetry using acoustic waves along the drillstring helps to know the physical and chemical properties of the formation and drilling fluid in Logging While Drilling. However, complex drillstring channel characteristics and normal downhole drilling operations will often adversely affect the quality of acoustic telemetry. Based on a theoretical channel model, we analyze the effects of transceiver optimal placements on acoustic transmission through a periodic drillstring. Considering the downhole noisy conditions including the surface noise sources, the downhole noise sources and multiple reflection echoes, dual acoustic receivers and an acoustic isolator are analyzed to improve the Signal-to-Noise Ratio and the capacity of the uplink channel. By arranging two receivers spaced one-quarter wavelength apart at receiver ends, the suppression results of one-way downlink noises are evaluated with the aid of the channel transient simulation model. Then the isolating results of uplink noises from drilling bit are investigated, with regard to the isolator placed between the downhole transmitter and a noise source. These methods, in conjunction with the complex drillstring features, show that the uses of the available transceiver design and signal processing techniques can make the drillstring as a waveguide for transmitting downhole sensor information at high data rate.
Study for the Method of Pressure Ease in Metro Transfer Station
Authors: Chen Ning , Chen Yan Yan , Zhang Guang Hou
Published: March 2013

For the transfer station which selects Platform Interchange as interchange mode, this article proposes the method of taking Upstream Platform as buffer container to ease passenger flow pressure of downstream platform through the analysis of the reason why the downstream platforms which have different interchange modes put up different platform pressure. To be easy to study and describe, this article creates a new concept of Pressure Contribution Rate which is to measure the balance state of passenger flow pressure and designs a procedure to select the optimal case. Finally, the article proves the feasibility of the method by taking Fuxingmen station as the example.
The Influence of Geometry, Manufacturing Asymmetry and Asymmetric Excitation on Vertical Vibration of a Mechanical System
Authors: Svoboda Martin , Soukup Josef
Published: March 2013

The article deals with the analysis of vertical vibrations of symmetric and asymmetric systems (possibility of application on vibration of vehicles and machinery units flexibly loaded machines). Vibration solution was performed by using numerical and experimental methods on a simple model of a vehicle. The complete solution of a space system has been made. The aim of the work was to build a mathematical model and its solution with use of FEM. The experimental solution was used to verify the numerical results and their verification.
Measurements of Residual Stress and Angular Distortion of 7075 Aluminum Alloy after Gas Tungsten Arc Welding
Authors: Wu Shih Jeh , Chung Chiao Wei , Kuo Chen Ming
Published: March 2013

7075 aluminum alloy is one of the most popular materials for structure. There are lots of demands for welding these structural materials. During the fast high temperature heating and cooling process serious residual stress is generated that causes the deterioration of structure strength. In this study, we investigate the residual stress induced in 7075 aluminum alloy after gas tungsten arc welding. X-ray diffraction method is applied to measure the residual stress under different joint angles. The angular distortion is also measured by a 3-D imaging system. Results show that both residual stress and angular distortion increase with the preparation angle.
Optimization of the Compositions of PEG/PMMA Binder System in Ceramic Injection Moulding via Water-Debinding
Authors: Yang Xian Feng , Liu Wei , Xie Zhi Peng , Xu Xie Wen
Published: March 2013

In this study, we have made a comprehensive investigation on optimization of the compositions of PEG/PMMA binder system for water-debinding. An orthogonal test was designed and L9(33) table was chosen to investigate the influence of the molecular weight of low molecular PEG (L-PEG), high molecular PEG (H-PEG) and the percentage of L-PEG in PEGs on flaws of the injection moulded compacts after water-debinding. In addition, the ratio of PMMA content to PEGs content on flaws is also investigated. Four regions were defined as high stress region, safe debinding region, low binder removal rate region and unavailable injection region respectively. It is believed that our work could provide comprehensive and convincing principles for the manufacturing of injection-moulded ceramic parts via water-debinding.