bluuebunny/crossref_metadata_2025 huggingface dataset:
Wireless Intelligence Sensor Array for Air Parameter Monitoring
Authors: Wang Jun Qiang , Yang Shu Qiang , Zhong Yuan Chang
Published: August 2013

This paper proposes a multiple target air parameters monitoring scheme with the help of the wireless intelligence sensor array which is built up with multiple sensors. In the paper, the design of the wireless intelligence array sensor is considered, the method to configure the wireless intelligence sensor network is introduced, and the information combination arithmetic of sensor network is provided. Then, a kind of minitype wireless multiple target air parameters monitoring system is built up. Experiment result clearly indicates that the system can accomplish the mission of monitoring multiple targets at the same time and the efficiency and reliability, make the air parameter monitoring arrives at a higher level. So the system proposed should be widely used in the domain of air parameter and toxic and harmful gas leakage monitoring.
A Novel Firefly Algorithm of Solving Nonlinear Equation Group
Authors: Zhaxi Cai Rang , Li Yue Guang
Published: August 2013

In this paper, according to the characteristics of nonlinear equations. A Novel Firefly Algorithm was used to solve the systems of nonlinear equations, the algorithm was experimented and the experimental results show that the new algorithm to be successful in locating multiple solutions and better accuracy. Simulations and results indicate that the novel firefly algorithm has better feasibility and validity for continuous space optimization and discrete space optimization.
A Research on the Enterprises Information Management Based on E-Commerce
Authors: Ye Shao Qin
Published: August 2013

The so-called e-commerce refers to the ESD (Electronic System of Distribution) which can be achieved in the areas of enterprises through the modern network and information technology, including the issuance and exchange basic information of the network, enterprises promotion, pre-market advertising, after-sales service and electronic distribution by electronic means, as well as, internal process and the electronic management information system applications of enterprises. In order to accommodate the complex network data of large scale companies, this thesis analyses PMI, strategy and role hierarchical model. On such a basis, the thesis proposes an applicable plan for access control of enterprises information system based on attribute certificate. These new entrants are often backed by advanced technology companies and competitive organizations with funds from Chinese and foreign conglomerates. Therefore, the applications of e-commerce in the field have brought about the information of business operations and internal management, which can provide consumers with a higher quality of services. In this paper, the enterprises information management and organization will be discussed in the e-commerce. Currently the technology of information and network develops rapidly. As a result, e-commerce, e-government and e-office prevail over our society and have become a part of our life. This situation enhances the efficiency of work and changes for the enterprises information management in China.
Liquid Sloshing Damping Computation in Cylindrical Tank Based on VOF Method
Authors: Tang Fei , Li Yong , Geng Yong Bin
Published: August 2013

For liquid sloshing in partially filled cylindrical tank, the influence of the free surface on the sloshing damping is very important, especially in the application of spacecraft. In order to calculate the damping characteristic of partially filled cylindrical tanks more accurately, the finite volume scheme base on Volume-of-Fluid (VOF) is used to simulate the interface flow in the tank. Second order accurate piecewise line interface construction scheme is used to reconstruct the free surface. Through the numerical simulation, the influence on the sloshing damping with different liquid fill ratios in the cylindrical tanks is obtained.At the end, by use of semi-empirical equation, found that it agrees with theoretical results reasonably well.
Control of Leading Edge Vortices Using Apex Flap over Non-Slender Delta Wing
Authors: Laiq-Ur Rehman Hafiz
Published: August 2013

This manuscript presents the vortex flow structure over non-slender delta wing with leading edge sweep angle, Λ=45°. A comprehensive investigation has been conducted in wind tunnel at Reynolds number ranging from, Re = 247,000 - 445,000. Seven-hole pressure probe measurements for axial vorticity, axial velocity, vortex trajectory and pressure variations are presented at various chordwise stations and angles of incidences. It was demonstrated that weak leading edge vortices are generated very close to the wing surface with strong shear layer which move upward and outboard with apex flap deflection. Reattachment line move towards wing root chord with the increase in angle of attack. Passive apex flap has been used to control the leading edge vortices and to delay the vortex breakdown. It is recognized that vortex breakdown was delayed by 8% by downward apex flap deflection.
Aerodynamic Optimization Design of Airfoil Based on Directly Manipulated FFD Technique
Authors: Bai Jun Qiang , Chen Song
Published: August 2013

The method of applying direct manipulated FFD (DFFD) technique into aerodynamic shape optimization has been proposed and researched. Due to the disadvantage of the original FFD method within which the geometrical manipulation is not direct and intuitive, the DFFD approach has been developed by solving each displacement of the FFD control points with some specified geometry points movements, so that the deformation of the target geometry could be directly manipulated. Besides, it has been illustrated that by DFFD method a relatively small number of design variables together with high order FFD control frame could be accomplished. The study cases has shown that applying this method in aerodynamic shape optimization of airfoil for drag reduction is of good feasibility and result, and could be coupled with effective geometrical constraints like airfoil thickness.
Comparison between Methods of Generation of Waveriders Derived from Streamline Tracing and Simplified Method
Authors: Ding Feng , Liu Jun , Jin Liang , Luo Shi Bin
Published: August 2013

Waverider with a high lift-to-drag ratio has drawn an ever increasing attention. Usually, waverider is obtained by tracing streamline. A simplified generation method of waverider is introduced in the present paper named geometric relations method. Three groups of cone-derived waverider configuration, respectively, based on the geometric relations method and the streamline tracing method are generated for the comparisons of the shape factors, inviscid aerodynamic characteristics, and flow field structures by investigating the numerical simulation results. The results show that the effect of the Mach number and the shock angle on the differences caused by the two methods are not significantly different. While the volumetric efficiency of the waverider configuration based on the geometric relations method is larger than those based on the streamline tracing, the inviscid lift-to-drag ratio of the former is less than the latter. Although the geometric relations method is much easier than the streamline tracing method, the simplified method reduces the aerodynamic performance of the waverider configuration.
Deterministic and Probabilistic Analysis of Steel Frame Bracing System Efficiency
Authors: Králik Juraj
Published: August 2013

The present paper is conceived so as to give a general image of the problems concerning the passive response-control structures. An attempt to organize the different aspects of the passive control of seismic structural vibrations in a rational way is made. Choice of optimal bracing system was tested on 10-storey administrative building steel frame structure in nuclear power plants. Dynamic and strength characteristic classical bracing system in form V and X and system with TPEA devices are presented. Analytical stress-strain relation for refined plasticity model and stiffness matrix for TPEA devices are presented in good agreement with experimental results. The element COMBIN39 from ANSYS library using to nonlinear model is very effective. Bracing system with TPEA device show that the energy-dissipation capacity of the structure increases and then the seismic effects are maximal reduced using it.
Three-Dimensional Dynamic Behavior of the Flexible Umbilical Cable System
Authors: Quan Wei Cai , Zhang Zhu Ying , Zhang Ai Qun , Zhang Qi Feng
Published: August 2013

We extend an idea of the modeling flexible umbilical cable using a nonlinear finite element method to three-dimensional space. The umbilical cable is assembled by Reissners geometrically exact beam elements, which take account of the geometric nonlinearities of large rotation and displacement, and effects of axial load, transverse shear, torsion and bending stiffness for modeling of slack cables. The resulting semi-discrete motion equations are solved by the Newmark method. Finally, an example about the three-dimensional dynamic behavior of the umbilical cable system in depth-dependent ocean current with ship motion is presented.
An Analytical and Experimental Study on Coolant Flow and Temperature Distribution within Pem Fuel Cell Stack
Authors: Amirfazli Amir , Asghari Saeed , Bazazzadeh Mehrdad
Published: August 2013

In the present study, a mathematical model is developed for investigation of coolant flow and temperature distribution within PEMFC stack. The model consists of two main sub models: (1) a coolant flow distribution model, which is used to determine the coolant mass flow distribution between different cooling flow fields of the fuel cell stack; and (2) a thermal model, which computes the coolant temperature increase along the flow field and also the temperature distribution within each cell of the stack. By using this model, optimized amount of effective parameters on stack coolant flow and temperature distribution could be obtained with respect to lower pressure drop along the manifolds and flow fields and more stack temperature uniformity. Test results of a 65-cells stack are presented to verify the simulation results.
Computational Modeling of the Liquid LPG Injection into the Suction Manifold of an SI Vehicle Engine
Authors: Beroun Stanislav , Brabec Pavel , Dittrich Aleš , Dráb Ondřej , Nguyen Thanh Tuan
Published: August 2013

LPG is a very first-rate alternative fuel for a vehicle SI engine. By mixture formation using the injection of the gaseous LPG into suction manifold of the naturally aspirated SI engine the engine power is reduced to the original petrol engine power. This advantage is corrected by mixture formation using the liquid LPG injection into the intake air to the suction manifold. The paper deals with the computational modelling of the process on the liquid LPG injection, especially of the history LPG pressure and the LPG temperature before outlet nozzle. The calibration of the computational model has been performed by the experiment. The paper proposes the design precaution on the icing of the outside on the outlet nozzle.
The Study of Cavity Flow and Transpiration Cooling in Supersonic Combustion
Authors: Wu Hai Yyan , Ding Meng , Su Yi
Published: August 2013

To unravel the flow and heat transfer mechanism of the cavity in supersonic combustion, this paper studied the interaction of cavities and shear-layers by experiments and numerical simulation. The experiments of Nero-particle Plane Laser Scatter (NPLS) and Plane Laser-Induced Fluorescence (PLIF) were conducted to study the cavity shear-layer. In the same supersonic condition the flow was studied by the method of Large Eddy Simulation (LES). And we discussed the cavity shear-layer influence to supersonic flow and combustion, analyzed the evolvement of injection shear-layer, probed into the heat transfer of supersonic combustion, and studied the transpiration cooling of cavities. The results show: in supersonic combustion, the initial flame spreads to the upstream through the cavity shear layer, the highest wall temperature occur at the rear edge of cavity, and transpiration cooling can effectively protect the wall materials.
Enhancing the Performance of Jet Engine Fuel Controller Using Neural Networks
Authors: Bazazzadeh Mehrdad , Shahriari Ali
Published: August 2013

This paper proposes a fuzzy logic controller for a specific turbojet engine. The turbine engines require control systems to achieve the appropriate performance. The control systems typically featured loops to prevent engine flame out, over speeds, compressor surge, and check turbine inlet temperature limit, either by scheduling the fuel flow during accelerations and decelerations or by controlling the acceleration and deceleration rates of engine spool. This paper presents a successful approach in designing a Fuzzy Logic Controller for a specific Jet Engine. At first a suitable mathematical model for the jet engine is presented by the aid of SIMULINK simulation software. Then by applying different reasonable fuel flow functions via the engine model, some important engine continuous time operation parameters (such as: thrust, compressor surge margin, turbine inlet temperature and engine spool speed...) are obtained. These parameters provide a precious database which can be used by a neural network. At the second step, by designing and training a feedforward multilayer perceptron neural network according to this available database; a number of different reasonable fuel flow functions for various engine acceleration operations are determined. These functions are used to define the desired fuzzy fuel functions. Indeed, the neural networks are used as an effective method to define the optimum fuzzy fuel functions. At the next step we design a fuzzy logic controller by using the engine simulation model and the neural network results. The proposed control scheme is proved by computer simulation using the designed engine model. The simulation results of engine model with fuzzy controller in comparison with the engine testing operation illustrate that the proposed controller achieves the desired performance.
Real-Time Dynamic Control of a Stewart Platform
Authors: Ordoñez Nicolas Andres , Rodríguez Carlos Francisco
Published: August 2013

This paper presents a real-time control strategy for the parallel robots such as the Stewart-Gough platform. The strategy is implemented using xPC Target (a Matlab toolbox), achieving sample rates higher than 1 kHz for the control loop. A modified explicit dynamic model, based on the virtual work principle, allows the formulation of dynamic control schemes, commonly used to control serial manipulators. Based on this approach, a computed torque control with friction compensation is implemented for a Stewart-Gough platform. Experimental results are compared with a classic uncoupled control strategy.
Research of a New Lunar Landing Gear Technology
Authors: Wang Yong Bin , Huang Wei , Zhang Wen Feng , Jiang Chang Hong
Published: August 2013

This paper discusses a new lunar landing gear technology. The landing gear is designed to achieve 1~2 tons of lunar lander landing buffer. Technical indicators are met by the designing of structure and simulation, and the final prototype model is designed and tested at last. Firstly, the design ideology of landing gear is introduced, and the choice of technical method is analyzed and compared. Secondly, the composition of landing gear is analyzed respectively. Finally, the landing gear is certified by landing impact test. The results prove the design rationality of landing gear. The landing gear has significant advantages, such as simple structure, light weight and small volume. The design ideology and experience of landing gear can be referenced by related research area.
Research on the Thermal Buckling Analysis of the Attitude Liquid Rocket Engine with Film Cooling
Authors: Hui Wei Hua , Bao Fu Ting , Hu Hai Feng , Liu Yang
Published: August 2013

A method which couples thermal and structure analysis has been efficiently implemented to investigate the buckling characteristics of the attitude liquid rocket engine with film cooling. It employs a model which is based on heat transfer of film cooling and introduces an integrated analysis methodology. The results indicate that the maximum wall temperature takes place at the throat of the nozzle, and the maximum wall stress appears at the place having the greatest temperature gradient. Moreover instability of the thrust chamber with big expanding ratio and thin thickness will happen under certain external pressure and the critical buckling loads is higher than the results without thermal load. These conclusions are reliable and should benefit rocket design.
The Effect of Hot Tearing in Semi Solid Casting of Aluminum A201 Alloy
Authors: Janudom S. , Wannasin J. , Kapranos P. , Wisutmethangoon S.
Published: August 2013

The effects of rheocasting times on the hot tearing defect in semi-solid die casting of aluminum A201 alloy have been investigated. This study found that no hot cracking formed in the semi-solid A201 alloy parts at a rheocasting time of 10 seconds, implying that the hot tearing suscepability (HTS) index value is zero. Moreover, the HTS index values for all semi-solid casting conditions were lower than those found in conventional casting samples. The microstructure of the as semi-solid casting parts consisting of non-dendritic structures and smaller grain size helped to improve the hot tearing resistance of aluminum A201 alloy. These results support the feasibility of semi-solid die casting of aluminum A201 alloy by using Gas Induced Semi-Solid (GISS) technique.
Micro Machining Issues: Design and Machining Process
Authors: Mekid Samir
Published: August 2013

Numerical controlled high speed micromachining on desktop machines is known to induce inherently new types of errors and machining issues at micro scale. The sources of these errors are either not known, or difficult to be modeled. Some of these errors are due to the downscaling effect of machine elements to a small micro-machine. This paper attempts to explore key issues proper to micro machines that are different from standard scale NC machine tools. Experimental observations are shown to support the discussion. The knowledge gained from these phenomena is used to nurture the design methodologies of micro-scale machines, to plan a suitable tool path and hence to improve the micromachining quality. This will also ascertain the statement that direct downscaling of current machine tools is worthless.
Research on a New Kind of Waterproof Agent for Desulphurization Gypsum Materials Block
Authors: Li Jian Quan , Gong Ming Zhu , Li Guo Zhong
Published: August 2013

The paper studied a compound desulphurization gypsum waterproof agent, which could modify the water-resistance performance of gypsum products on the basis of their microstructural properties. The waterproof mechanics were the synthesis results of superficial hydrophobic of hydrophobic emulsion, hindrance water of film forming matter and reducing the porosity in materials. The experiment results showed that the water-absorption rate of gypsum hardened body can be reduced to 3.5% and that the compressive strength reserve rate was 89.7% after 24h.
Strength Properties and Chemical Composition of Materials Used in Weathering Steel Bridges
Authors: Křivý Vit , Konečný Petr , Urban Viktor
Published: August 2013

The paper deals with a statistical evaluation of the real material properties of weathering steels used for the construction of motorway bridges in the Czech Republic between 2001 and 2007. The statistical analysis and evaluation is carried out for a range of hot rolled plates made of S355J2W weathering steel. The paper contains an evaluation of the strength properties of the steel and its chemical composition. The paper also contains derived real values of partial factors of materials corresponding to the relevant reliability classes RC1 to RC3 pursuant to the European standard EN 1990.
Statistical Analysis for Structure and Regeneration Responses of Degraded Forests towards Quality Improvement
Authors: Liu Xian Zhao
Published: August 2013

s. Degraded forests are characterized by decrease in canopy cover density and tree growth; thus, the term degradation implies a loss of forest structure, productivity and regeneration. The decrease is often a consequence of high-grading selection cutting, which means removal of highest quality wood which reduce overall stand quality, illegal felling, and natural disturbance. All these factors result in the loss of ecological integrity of a forest and hasten the degradation process. This presentation introduces the study on structure and dynamic of degraded forests using three examples of typical degraded forests from the tropics of Hainan, the warm temperate zone of Beijing, and the temperate forest in Northeastern city Haerbin. Factors and variables of successional stage, canopy type and regeneration tendency of the degraded forests are analyzed, and operation measures for improving quality and growth of these forests are designed based on findings of the analysis. Preliminary data from improvement operation shows clear positive responses of trees and stands from the improvement operation.
Circular Plate-Membrane with Small Deflection and Maximum Sensitivity
Authors: Abdeev B.M. , Yelemes D.E. , Sakimov M.A.
Published: August 2013

Classical hextremum problem to determine the optimum geometrical parameters of a linear-elastic, homogeneous, isotropic circular membrane with a rigid central disk is the static effect of a concentrated force is solved. Ratio of 0.326 found between the inner and outer radius of the membrane plate provides the greatest sensitivity, efficient thickness and minimum materials consumption, which is a consequence of the implementation of the condition of reliability for the safety factor for the down to the limit state of springing element. The energy failure theory of Huber-Hencky-Mises (Huber M.T., Hencky H., Mises R.) is used as the constraint equation. Due to the complexity (transcendence) of the formula target sensitivity function that depends on two controlled variables, the procedure of maximization is performed by search for the direct numerical method. The developed mechanical-mathematical model of the optimization process is based on three well-known conditions proposed by G. Kirchhoff for the thin plate-bending theory.The derived formulas can be used for optimal design of capacitive, inductive and strain measuring force sensory data unit, in which the membrane requires the greatest move, that is, high sensitivity, and the membrane plate is loaded only by the working pressure without experiencing reaction from the mechanism of the device.
Study on Wear of Wheel Steel under High Speed Working Condition
Authors: Zhong W. , Dong L. , Liu X.Y.
Published: August 2013

Abstract: according to Hertz contact theory, the experimental study and micro-morphology analysis on the fatigue wear of 2 different kinds of wheel materials were conducted by using JD-1 wheel/rail simulation testing machine, to provide a basis for the selection of wheels used on high speed railway. The result shows that the degree of wear of the wheel steel mainly depended on the hardness, the two materials displayed a certain oxidation and stripping and their stripping morphologies were different obviously.
Validity of Several Thermal Conductivity Models in Metal Oxide Nanoparticles Filled Polycarbonate
Authors: Akbarzadeh Mohammad , Ebadi-Dehaghani Hassan , Sadeghi Meisam
Published: August 2013

The thermal conductivity (TC) of compression moulded polycarbonate (PC) and PC filled with 2.5-5% iron oxide (α-Fe2O3), cupric oxide (CuO) or magnesium oxide (MgO) nanoparticles, prepared by extrusion, was studied using a thermal conductivity analyser (TCA). The effect of type and content of nanoparticles on the thermal conductivity was investigated. The experimental TC values of the PC nanocomposites showed an increase with an increase in the level of nanoparticles concentration. The TC improvement in PC/CuO nanocomposite was greater than that of other nanocomposites. Several models were used for prediction of the TC in the nanocomposites. In all nanocomposites the TC values correlated well with the values predicted by the Ce Wen Nan model up to 5wt%.
Investigation of Data Treatment Methods for Wireless Tracing System in Automotive Industry
Authors: Yang Y.M. , Salvatore D. , Yang S.H. , Wu M.H. , Oraifige A.
Published: August 2013

The paper introduces the data treatment methods of the wireless signal in a car tracing system at automotive manufactures stock yard. The paper shows the overall of the function of the wireless tracing system and introduces the Fingerprint method used in the system first. And then, the paper introduced how to use the wireless signal data to build up the database used for Fingerprint method in each board router. Two different types of data have been mentioned in the paper which are going to be stored into the database are average data and Fuzzy data. The following paragraphs of the paper introduces the application of the wireless tracing system based on Fingerprint method and discusses the influence of the different grid definitions of the stock yard to the application.
Operations Analysis: Practice on Performance Measurement in Supply Chain
Authors: Borhan Resty Izzaty , Fhang Oh Wei , Sorooshian Shahryar
Published: August 2013

The paper presents the research report studied at the largest natural gas producer and the petroleum retail market leader in Malaysia. The study is to understand the logistics performance measurement in the supply chain, including the theoretical discussion on data collected and logistic performance of a real organization using the balanced scorecard. Besides that, the study will also access the performance of the company and followed by identifying the problems and provides recommendations for improvements.
Construction of Virtual Petrochemical Enterprises Based on Virtual Reality Technology
Authors: Chai Wen Yan , Fu Gang , Xiao Ti Bai , Sun Qiao Yun
Published: August 2013

As petrochemical production equipment with a high degree of risk, on-site training of operating staff and management has brought a great deal of difficulty. Therefore, this paper introduces our research and development work based on virtual reality technology to construct a virtual environment of petrochemical enterprises for on-site training of operating staff and management. To establish the virtual petrochemical enterprises, we adopted 3DMAX as a modeling tool, the VRP (Virtual Reality Platform) as a virtual reality platform as an operation platform. First of all, we create the various sub-scene of the area of petrochemical plants and do model integration and processing to result in the virtual scene with the virtual reality software. Then, we set interactive interface, allowing users to interact with the platform, which makes operations easier. We built-in virtual cameras and pre-recorded screen video to help play the presentation of the video content automatically, so that without human interaction will require. Finally, the role of script will blend with the real three-dimensional scene, the 2D panel and the daemon in order to obtain the true visual display. Therefore, the developed virtual petrochemical enterprise platform has a good show with its real intuitive.
Solution of Material Mechanics by RPIM Meshless Method
Authors: Dong Wen Sheng , Lei Zheng , Liu Xue Mei
Published: August 2013

With the compact support of radial point interpolation shape functions (RPIM), the stiffness matrix of system equation can be sparse, so its very suitable for meshless methods.This interpolation method have the Kronecker delta function property, so the essential boundary conditions can be enforced directly and accurately without any additional treatment. In this paper, the radial point interpolation shape function is used, calculate the shape function in different node distribution cases, analyse the compact support and Kronecker delta function,use penalty method to apply the essential boundary conditions. In this paper, the RPIM is applied to solving the deformation in one and two dimensional solids by different loads, the results demonstrated that the meshfree RPIM can effectively solve material mechanics problems.
Recursive PLS Modeling of Aromatics and Olefins in Gasoline
Authors: Wang Jing Fang
Published: August 2013

The separate calibration models of aromatics and olefins were established for gasoline through recursive partial least square (R-PLS) method in this paper.The some oil refining enterprise application has achieved better effect on the software being realized by R-PLS method. The calibration models were validated through comparison of the results determined by fluorescent indicator adsorption (FIA) and near infrared spectroscopy (NIR) methods.The NIR analysis results were well coincident with those of FIA method.The NIR can not only raise the analysis efficiency and lower the analysis cost,but also has better precision compared with FIA method.
Factors Related to Hospital Operating Room Scheduling of the Performance in the Medical Center
Authors: Pu Chi Ming , Leu Jen Der , Ku Hsueh Ling
Published: August 2013

Objective:This study examines the 2009 patient operating room (OR) length of stay data for a medical center in Taipei City. Using a statistical method based on regression analysis, the crucial factors that influence OR efficiency and performance were identified. The analytical results indicated that surgical procedures with general anesthesia and high surgical complexity incurred high surgical fees. Additionally, the anesthesia fees, operating time, and operating time variance rises as the squared number of surgical procedures increases. Therefore, for the hospitals 2010 OR scheduling management strategy, we adjusted the priority regulations for daily OR use to enhance the safety and quality of surgical patient health care and improve OR efficiency.Method:We collected 11 case ORs, that is, 9 inpatient and 2 outpatient ORs, for this study. The pre-implementation data were collected between January 1, 2009, and December 31, 2009. The post-implementation data were collected between January 1, 2010, and December 31, 2010; both forms of data included patients OR length of stay information. Furthermore, the indicators that were compared and analyzed for this study included variances in the number of cases in which general anesthesia was administered, the number of scheduled surgical procedures, the number of emergency surgical procedures, and OR use rates.Results:A total of 20,731 surgical operations were performed in 2009, among which general anesthesia was administered 6,925 times, 10,122 scheduled surgical procedures were performed, 1,305 emergency surgical procedures were performed, and the OR use rate was 70.30%. A total of 21,105 surgical operations were performed in 2010, among which general anesthesia was administered 7,106 times, 10,549 scheduled surgical procedures were performed, 1,319 emergency surgical procedures were performed, and the OR use rate was 71.05%.
Fabrication of Combined Capacitive Micromachined Ultrasound Transducers with Release Method
Authors: Zhang Pei Yu , Li Yan
Published: August 2013

A novel combined capacitive micromachined ultrasound transducer (CMUT) with release method was proposed and fabricated with. The combined CMUT has alternating low and high-frequency elements. Several different combined patterns of CMUTs were offered. The performances of CMUTs are strongly dependent on the geometrical properties of the single cells and their arrangement within each element as well. Finite element simulations are used for analysis, design, and optimization of CMUT cells to predict device performance. Electrostatic interactions for 3-D coupled-field simulations are also performed to help investigate the electro-mechanical properties of the CMUTs. Feasibility devices are then fabricated using chromium as a sacrificial release material. The top membrane is built using a sandwich structure to ensure the formation of large size membranes with low stress.
Study of Concrete Using Modified Polystyrene Coarse Aggregate
Authors: Al Bakri A.M. Mustafa , Zarina Y. , Noor M.N. , Kamarudin H. , Ruzaidi C.M. , Rafiza A.R.
Published: August 2013

Polymer recycling has received a great deal of attention in recent years. At the present time, small percentages of polymer wastes in Malaysia are being recycled. The recycling process has typically consisted of reprocessing the waste material to make other polymeric products or energy recovery from complete combustion. Thus, the development of concrete using non-conventional aggregates, such as polymer waste (especially polystyrene), ceramic waste, or other wastes, has been investigated to determine the comparative properties of the various concretes and the comparative costs. This paper the results of an experimental study in which the coarse aggregates used in conventional concrete were replaced by polystyrene waste aggregate to produce a lightweight material. The proportions of the mixtures were varied to determine the water-cement ratio and the content of polystyrene waste aggregates that provide the best results. The properties of the aggregates were also compared. Strength tests were conducted after the experimental concrete was cured for 28 days, and the experimental results indicated that the strength of the concrete made with polystryene waste aggregate ranged from 14 to 17 MPa. In addition, the density of these concretes ranged between 1467 to 1560 kg/m3, which means that they would be categorized as lightweight concretes. The results also indicated that the workability of the polystyrene waste aggregate concretes was good, and the strength characteristics were comparable to those of conventional concrete.
Effect of Ions Substitution on Nanospace La-Fe-O Catalytic Properties for Simultaneous Removal of NOx and Soot
Authors: Meng Xiao Xiao , Jing Mao Xiang , He Feng Lin , Shen Xiang Qian
Published: August 2013

The catalysts La0.8K0.2FeO3(LKFO), La0.8K0.2Fe0.7Mn0.3O3(LKFMO) and La0.8K0.2Fe0.67Mn0.3Pt0.03O3(LKFMPO) were prepared by the citrate-gel process and the catalyst-coated honeycomb ceramic devices were prepared by the citrate-gel assisted dip-coating method. All the catalysts have a high performance on the simultaneous removal of NOxand soot at a temperature range of 200 to 400°C under the practical diesel exhaust emission. The obvious catalytic improvement is largely due to the effects of ions substitution, pore structure and microstructural characteristics of the catalysts. The catalytic performance order is LKFMPO > LKFMO > LKFO. Among them the LKFMPO catalyst shows the best catalytic properties, especially in the removal of NOx, with a maximum conversion rate of NOx(21.2%).
Effects of Inner Corrosion Defects Size on the Surface Strain of Oil and Gas Pipelines
Authors: Cheng Fang Jie , Zhao Hai We , Wu Yun Long , Liu Wei , Cao Hong Yuan , Chen Ya Nan
Published: August 2013

Inner corrosion defects have great effects on the life and safety of the oil and pipelines. To predict the safety by the surface strain and stress condition, ANSYS software was applied to analyze the effects of the inner corrosion defects size (diameter and depth) on the surface strain and stress value. The combined effects of defect diameter and depth on the circumferential direction strain of pipeline were obtained. The simulation results indicate that there is a linear relationship between circumferential direction strain and the defect diameter, an exponential relationship between circumferential strain and defect depth. Furthermore, there is a proportional relationship between the circumferential strain and the operating pressure of the pipeline. An empirical formula to calculate the surface strain used the defect diameter, depth and the operating pressure was developed based on the numerical simulation data. The experimental results verify the reliability and validity of this empirical formula for engineering prediction application.
Application of Automated Complex Gas Reaction Controller for Hydrogen Storage Materials Investigation
Authors: Kudiiarov Viktor N. , Gulidova Luydmila V. , Pushilina Natalia S. , Lider Andrey M.
Published: August 2013

Automated complex Gas Reaction Controller and its application for hydrogen storage materials investigation are described in this article. Pressure-composition isotherms (PCI) and kinetics measurements of LaNi5 have been obtained for validation of the apparatus. Measurements of both absorption and desorption PCI curves and kinetics measurements at different conditions have been obtained for carbon nanotubes to estimate its hydrogen storage properties.
Mechanical Properties of Polymer Composites with Sugarcane Bagasse Filler
Authors: Al Bakri A.M. Mustafa , Liyana J. , Norazian M.N. , Kamarudin H. , Ruzaidi C.M.
Published: August 2013

Natural fibers reinforced polymer composites have gained more interest because of their biodegradable, light weight, less expensive sources, easy processing, high specific modulus and also environmentally friendly appeal. This paper presents an overview of a study aimed at showing on how the bio-composites which is bagasse fibers combined with resins as an alternative of bagasse-fiber-based composites panel. Transforming bagasse fibers into panel products provides a prospective solution. Bagasse-fiber-based composites offer potential as the core material replacing high density and expensive wood-based fiberboard. Biodegradable composites reinforced with bagasse fibres after being modified or treated by alkali treatment were prepared and also the mechanical properties were investigated. The bio-composites panel samples were processed by hot press machine. All panels were made with aspect ratios between bagasse fibers and polystyrene thermoplastics resins and also the sieve size of bagasse fibers which has short fibers and combination of short fiber and granules fibers. The polystyrene was added as a modified from natural fibers to determine the effect it had on physical and mechanical properties of the panel. Resin content level and panel density were very important in controlling the strength properties of the panels. Surface hardness value, compressive strength, bending strength and bending modulus values all increases in resin content level and panel density. Bagasse-based-panel products can be commercialize successfully if have good development of a cost manufacturing process on an establishment of a market base for the products.
The Approach to Practical Training Course for Students in Mechatronics and Automation
Authors: Kaveshnikov Vladimir , Gurevich Vladislav , Anosov Vladimir
Published: August 2013

Problems of practical educational process in mechatronics and automation appeared last time because of avalanche-like growth of information stream in the field lead to necessity to renovate concepts of laboratory base in educational activity. The paper considers modern approaches to practical training course realized in Novosibirsk State Technical University (Russia).
The Application of Map Object Pool in Vehicle Monitoring System
Authors: Du Peng Cheng , Huo Meng You
Published: August 2013

Combined with vehicle map location surveillance applications, this paper presents a realization method of the map object pool based on the analysis of the basic principles of object pool technology. The test results by LoadRunner show that its reasonable to use the map object pool and it greatly enhances the real-time data processing performance of system map.
Preliminary Micro Flora Diversity in Biological Aerated Filter by Molecular Ecology
Authors: Li Miao Wan , Yu Yan Zhen , Feng Yan , Cheng Lei
Published: August 2013

Use molecular ecology technology to analyze bacteria populations in biofilm, which has a very important significance for effective sewage treatment and improvement of nitrogen and phosphorus removal rate. This article described RFLP, SSCP, FISH etc., brought together the research results at home and abroad, broadened the idea of exploring the diversity of microorganisms, the structure and distribution, as well as the dynamic in BAF.
Relationship between International Roughness Index and Power Spectral Density of Asphalt Pavements in China
Authors: Liu Shao Wen , Zhang Xiao
Published: August 2013

In this paper, pavement roughness is assumed as random stationary variable and used as the exciting force of theoretical analyses of the quarter car model of International Roughness Index (IRI). From the frequency response function of the quarter car, the response function of the displacement difference between sprung and unsprung mass is obtained based on random process theory. Then the relationship between IRI and power spectral density (PSD) is established from statement characteristic of the response function. Finally, the longitudinal road profiles of typical asphalt roads in China are used to validate the proposed model.
Statistical Analysis of the Development Tragedy of Low Carbon Economy of Hi-Tech Industry in Shandong Province
Authors: Huang Zhi Qin , Wang Wei , Yan Ting
Published: August 2013

Low carbon economy is the main direction of the future development of China. The hi-tech industry area has the features of tech-intensified, high energy consumption, high pollution, to develop hi-tech industry is good for the transfer from traditional industry to the low carbon economy mode. As a big province of China, it is imperative for Shandong Province to develop the low-carbon economy. Therefore scientific solution on carbon emissions of high-tech industrial area in Shandong province is a problem for government and academic workers to have to face and resolve. This paper analyzes the low-carbon economic situation of high-tech industry in Shandong province, and puts forward some countermeasures for low carbon economy development of high-tech industry in Shandong province.
Influence of Rolling Temperature on Fatigue Life of Calibrated Rolls
Authors: Domazet Ž. , Lukša F.
Published: August 2013

In the hot rolling process calibrated rolls are used for the production of various simple and complex profiles. Rolling temperature is an important parameter of technological process which has great influence on energy costs, scale formation and rolling forces. In order to reduce the cost of energy, an analysis of the rolling temperature influence on fatigue life of the rolls has been carried out.The fatigue life estimation is carried out according to the fatigue life stress concept based on the local stress.Stress spectra in critical areas are determined for three different temperatures. The analysis shows that although lowering of the initial rolling temperature causing decreasing the fatigue life of the roll, the stresses caused by the rolling at thelowest temperature should not lead to roll fracture.
Experimental Investigation on Composite Seismic Isolation System
Authors: Dang Xin Zhi , Yang Hao Lin , Yuan Wan Cheng , Song De Qin
Published: August 2013

The objective of the present work is to propose a new composite seismic isolation system device based on the cable-sliding friction aseismic bearing (CSFAB). Multi-chip steel spiral spring (MSSS) are characterized by unique mechanical properties due to elastic recovery capability. An isolation bearing system based on a MSSS elastic effect is intended to provide recovery properties to reduce or eliminate the residual deformations. The device concept is based on two separate systems, one to transmit the vertical load and to act as a lateral restrainer at meantime, the other contributes to the automatic reset functions in the system. This article presents in detail the mechanical components of the innovative device focusing on its main properties. The load-deformation curve established in this paper is verified to be efficient in describing the mechanical characteristics of the device through experiment. The results could provide reference for study and application of the new composite seismic isolation system.
The Influence of Different Resistance on Stability of Curve Jointless Line
Authors: Yang Jun Bin , Dai Feng , Liu Xue Yi
Published: August 2013

To study the influence of different resistances on curve jointless line with allowable temperature rise, three kinds of finite element models are established by ANSYS to calculate the allowable temperature rise respectively with 2mm lateral displacement in five different curve jointless lines when both longitudinal and lateral resistance are nonlinear. And then we compare the results of three finite element models with that of wavelength equal model. It is shown that the effect of resistance on the allowable temperature rise of curve jointless lines goes less as the curve radius becomes longer. These 3 finite element models can be adopted to analyze stability of curve jointless lines. Considering the difficulty in model and computational efficiency, the second model in the thesis is highly recommended when analyzing the stability of curve jointless lines.
Application and Study of Fuzzy Neural Network Theory Based on Takagi-Sugeno Model to Thermal Error Modeling on NC Machine Tool
Authors: Liu Zi Jian , Yu Zhi Min , Li Si Ming , Ai Yan Di
Published: August 2013

For the degree of thermal deformation nonlinear is high and difficult to predict, fuzzy neural network modeling (FNN) based on Takagi-Sugeno model was applied to the NC machine tool thermal error modeling thus the complete thermal error fuzzy neural network mathematical model on NC machine tool was established and network parameters initialization and learning method were discussed. Thermal error experiment was conducted on large NC gantry rail grinder spindle box system and two independent groups of spindle thermal error data were collected, one was used to establish thermal error fuzzy neural network prediction model and another one was used to verify the prediction accuracy of this model. The test results show that fuzzy neural network model has high prediction accuracy.
Self-Moving Tail Prototyping and Structural Improvements
Authors: Cheng Jin , Guo Yong Cun
Published: August 2013

virtual prototyping technology 1980s developed a computer-aided engineering and virtual prototyping technology applications in the research and development of self-moving tail can greatly enhance progress in the development of the mechanical design of fully mechanized coal miningthe surface level of mechanization upgrade of great significance.
Study on the Constitutive Behavior and Damage Evolution in the FPZ of WST Specimens Using the Vic-2D and Strain Gauges
Authors: Liu De Yu , Su Kun Peng , Deng Ai Min
Published: August 2013

The Vic-2D is an innovate system that uses a non-invasive method called Digital Image Correlation (DIC) technique, which provides a contour map of strains of an entire specimen surface subject to mechanical tests, based on gray value digitalized images. The paper presents the results of experimental investigations of the constitutive behavior and damage evolution in the fracture process zone (FPZ) of concrete using the Vic-2D, in comparison with the traditional strain gauge method. The model tests were performed with notched concrete specimens via the Wedge Splitting Test (WST) method. During the tests, stress-strain curves and evolution of the damage variable were determined and analyzed at multiple levels. The results provide the achievements obtained and some limitations with both two methods.