bluuebunny/crossref_metadata_2025 huggingface dataset:
A Study of the Effect of Forcipomyia Taiwana Repellents Made of Plant Extracts
Authors: Lou Ching Wen , Sie Ming Chun , Lu Chao Tsang , Kuo Huey Liang , Lin Jia Horng
Published: August 2013

The bite of Forcipomyia taiwana (F. taiwana) causes intense pruritus and swelling in sensitive skin. Most commercially available F. taiwana repellents are made of N, N-diethyl-3-methylbenzamide synthetic repellents [; however, using them for a long time influences skins, and the nervous and immune system. This study uses the water extracted Cinnamomum osmophloeum Kaneh and Cymbopogon excavates for the Y-tube test, determining the repellent effect of these two extracts and the influence of water extract time on the difference in their repellent effect.
Ship Welding Defect Analysis and Quality Control
Authors: Jing Yan , Yu Li Min
Published: August 2013

Common welding defects in ship building and ship repair were intro-duced; the forming mechanisms, distributions and forms of expression of the defects were analyzed, Foundry-Techniques for preventing kinds of defects were given and common methods and application scope of ship welding inspection were concluded.
A Method of Cultural Creative Product Design Based on Reverse Engineering
Authors: Yao Lan , Jiang Chao , Yu Sui Huai
Published: August 2013

With the improvement of the social civilization, culture connotations of design problems have become increasingly prominent. And the cultural elements must integrate into design work to get development. Since cultural and creative product design is the re-exhibition of culture, traditional culture spirit connotation and cultural nutrition should be grasped and absorbed. Reverse engineering is a very important design method which is widely used in product design. Based on reverse engineering, a rapid and high quality creative design method over cultural and creative product design is proposed. The practical design application proves that the proposed method is feasible, of practical significance and application value.
Virtual Design of Rapid Sample Preparation Equipment for Textiles Based on SOLIDWORKS
Authors: He Yang
Published: August 2013

The rapid sample preparation equipment has been designed for the detection of the chemical composition of textiles, the device can rapidly and quantitatively sample preparation, to meet the needs of modern detection. Firstly, introduced the design requirements and design process, and the equipment is designed based on SOLIDWORKS software platform, then check interference. finally, analysis the mechanical properties of the equipment using SOLIDWORKS Simulation Xpress module. The results verify the feasibility and rationality of the design for the automated detection of reference fabric.
Damage Radius Study of Gimbaled Forward-Firing Warhead to Tactical Ballistic Missile
Authors: Shi Zhi Bin , Gao Min , Han Lu Jie
Published: August 2013

Gimbaled forward-firing warhead (GFFW) is one of the most efficient types for killing enhancement that exist today. This is because almost all the fragments of the warhead are deployed to the targets direction. Static explosion experiment was performed to investigate the spatial distribution of the spray pattern as well as its deployment velocity. The cone angle (θs) of fragments bundle at static conditions is 15°, and fragments in the mesial area is dense than that in the marginal area. The average velocity of the fragment in mesial area is 1712m/s, and that in marginal area is 1408m/s. In conjunction with deployment experiments, damage radius study is conducted with the basic criterion that one fragment must hit target payload at least. Damage radius at the dynamic conditions is 150m~165m, which is more farther than conventional uniform warhead.
On Energy Harvesting Characteristics of Cymbal Transducer
Authors: Chen Yong Chao , Gao Min , Yu Wei Bo , Zhang Lei
Published: August 2013

The energy-generating capability of a cymbal transducer was studied in order to supply the power of low-consumption electric products. An analytical model of the cymbal transducer was established by the hydrostatic piezoelectric constant method. The relation between the material of metal cap as well as the structure of transducer and energy generation were analyzed by numerical simulation. The simulation validation was done by the element software ANSYS. The results of the study show that, in the same force, the materials of metal cap, the radius of cavity bottom, and the thickness of metal cap have bigger influence on the voltage outputted, the radius of cavity top have less influence on the voltage outputted.
Innovative Design of Variable Visual Field Collimator Based on Conflict Resolution Theory of TRIZ
Authors: Li Chao , Yu De Ping , Wu Da Ke , Cao Xiu Quan , Yao Jin
Published: August 2013

Collimators are used in radiosurgery or radiotherapy systems to accurately focus their high-energy rays on the target to avoid causing damage to the collateral healthy tissues. With the development of conformal radiotherapy techniques, variable visual field collimators (VVFC) are widely used and many designs of VVFC have been proposed. However, these designs still exhibit different deficiencies, e.g. unable to completely eliminate the radiation leakage due to the inter-block gaps. Therefore, in this paper, an innovative design of VVFC is proposed through analyzing the original VVFC, determining the conflicts and solving them using the inventive problem solving methods (TRIZ). Compared with the existing designs of VVFC, the proposed design enables the selection of suitable size of field for the treatment of different size of targets, and completely eliminates the radiation leakage due to inter-block gaps.
Finite Element Analysis of a Wind-Solar Hybrid Powered Street Light
Authors: Xu Xiang , Wang Wei , Fan Ping Ping
Published: August 2013

A finite elementmodel of a 9-meter-high wind-solar hybrid powered street light was established;statics analysis, modal analysis and harmonic response analysis were performedusing ANSYS. Static analysis determined the maximum deformation and stress of astreet light under complex load, and checked its intensity and rigidity. Modalanalysis and harmonic response analysis obtained a vibration mode of a streetlight and its natural frequency of every order. The results of analysesprovided references for the optimization of street light structure.
Rigid Rotor Dynamic Balancing by Two-Plane Correction with the Influence Coefficient Method
Authors: Xu Xiang , Fan Ping Ping
Published: August 2013

A rigid rotor dynamic balance model was established to analyze the vibration form of a rigid rotor under unbalance inertia force. The principle of two-plane correction with the influence coefficient method had been conducted, and the principle of the cross-correlation method calculating amplitude and phase of unbalance vibration signal was introduced. The method was found to be effective and practical. A dynamic balance test program was performed on a rigid rotor vibration simulation instrument and a dynamic balancing analyzer based on LabVIEW, which showed that rigid rotor dynamic balancing by two-plane correction with the influence coefficient method could satisfy the performance and required precision.
Model Updating of Dynamic Systems Using Structural Reanalysis Method
Authors: Han Kyoung Bong , Cho Doo Yong
Published: August 2013

Model updating methodologies are invariably successful when used on noise-free simulated data, but tend to be unpredictable when presented with real experimental data that are unavoidably corrupted with uncorrelated noise content. In this paper, reanalysis using frequency response functions for correlating and updating dynamic systems is presented. A transformation matrix is obtained from the relationship between the complex and the normal frequency response functions of a structure. The transformation matrix is employed to calculate the modified damping matrix of the system. The modified mass and stiffness matrices are identified from the normal frequency response functions by using the least squares method. A numerical example is employed to illustrate the applicability of the proposed method. The result indicates that the present method is effective.
Modeling of Railway Axle Box System for Thermal Analysis
Authors: Yoon Hyuk Jin , Park Myung Jun , Shin Kwang Bok , Na Hee Seung
Published: August 2013

Finite element pre-processing of the railway axle box system is done to analyze heat transfer from the axle to the body. Model geometry which is same with the experimental specimen is designed and cleaned up: connection of adjacent surfaces is repaired; missing surface is created; complex geometry is broken down into simple shapes. Next, the axle box system, which is composed of the axle box, axle box cover, bearing, and axle is meshed with 3D solid element, and then mechanical properties of the materials are added on each components for thermal analysis. The whole model of axle box system has 226,776 nodes and 322,840 elements.
The Influence of the Material Properties on the Hydraulic Spool Valve's Viscous Temperature Rise
Authors: Yan Jing Jiang , Ke Jian , Liu Huan Long , Wang Guo Zhi , Zhou Da Hai
Published: August 2013

Hydraulic spool valve is one of the important elements in the hydraulic system. Considering the material properties of the fluid and solid, CFD models of the viscous temperature rise was built and calculated with the spool material influence on the viscous temperature rise and thermal deformation. Analyzed: the viscosity of the fluid was the main factor affecting on temperature rise, while the coefficient of thermal expansion of the spool was also the main factor to affect the throttling temperature rise of the deformation.
Research on Dynamical Characteristics for the Feed System Considering Nonlinear Friction Force
Authors: Yang Jian Jun , Wu Qin , Rui Zhi Yuan , Lei Chun Li
Published: August 2013

The model that describes the friction between contact surfaces of motion pair of the feed system has been established use of Stribeck friction theory, it fully reflected the various lubrication conditions. The bifurcation and stability analysis of the model has been done. The experimental methods were used to research the nonlinear dynamics characteristics of the feed system under the external excitation. The influences that friction force to the nonlinear characteristics of the system at the certain parameters condition were analyzed. Utilize the research findings of the dynamical characteristics that caused by friction in the feed system can effectively provide a theoretical basis for designing optimization of complex systems in engineering, fault diagnosis and vibration control.
Three-Dimensional Analyses of Spur Gear Bending Stresses by Global-Local Finite Element Technique
Authors: Xu Ya Zhou , Wu Zhi Xue , Tian Shu Ai , Hua Ya Jun
Published: August 2013

Three-dimensional elastic stresses developed in the root fillet of spur gear tooth due to uniform or non-uniform load distribution are analyzed in detail using global-local technique. Results indicate that root stresses distribute always non-uniformly along tooth width, and the maximum critical root stress (CRS) and its position depend on the face width and load distribution form. The maximum CRS is always higher than the corresponding value obtained under plane assumption and the value on the free surface. So, it is dangerous to use the CRSs calculated in practical gear designs. This research provides knowledge of root stresses for engineer to guard against gear failure and to design for increased loading.
Dynamic Behavior of All-Ceramic Spindle-Bearing Unit with Preload
Authors: Li Song Hua , Li Xue , Feng Ming Hao , Wu Yu Hou , Jin Xiao Lin
Published: August 2013

Abstract. Because of the extraordinary physical properties of engineering ceramics such as high hardness, low thermal expansion, light weight and abrasion resistant, it accommodates very well with the high-speed and precision requirements of spindle-bearing unit. In order to prove the superior dynamic characteristic of the all-ceramic spindle-bearing unit bacause of the application of engineering ceramics in shaft and bearing of spindle system, the natural frequency and modes of the all-ceramic spindle-bearing unit were analyzed. In this study, spindle-bearing model was built and analyzed by the Finite Element Method(FEM) and Hertz theory, comprehensively considering both of the stiffness of bearing and the effect of preload, which was different from the tranditional spindle analysis model. The research results show that all-ceramic spindle-bearing unit has higher natural frequency and better dynamic characteristics compare of traditional steel spindle-bearing unit.
FEM Analysis of Contact for Converter Spherical Hinge
Authors: Ren Xue Ping , Gao Jian Da
Published: August 2013

The role of converter spherical hinge is one of the main components, combined with practical work and With help of FEM, Thermal Stress coupling field of spherical washer can been obtained through numerical simulation. The result supplies substantial theoretical basis for further structure design and optimum design of mechanism.
A Study of Shaft Vibration Based on Transfer Matrix
Authors: Tan Chang , Guo Zhi Ling , Zhou Rui Kun
Published: August 2013

This paper first analyze the method of transfer matrix, set up the lumped parameter model. then figure out the common transfer matrix of shaft. Take some shaft as an example, using matlab calculate the critical speed and analyze the result. The analysis can provide basis and method for shaft vibration numerical simulation.
A Simple Correlation Equation to Predict Pump Performance for Slurry
Authors: He Peng Cheng , Song Peng Yun
Published: August 2013

As to the centrifugal pump for slurry, the effects of solids particles on the performance of the pump have been extensively researched. It is essential to understand the effects of solids on the pump performance well in order to obtain the performance of centrifugal pump for handling slurries. Some existing correlation equations to predict the performance are analyzed and summarized in this paper. A new simple correlation equation to predict the head ratio for pumps handling solids has been developed. The simple equation has been validated by the experiment data published in the related literature. The results by the simple equation are compared with ones available in the literature. The result shows that the simple equation is in good agreement with the experimental data, and it can be used to predict the performance of centrifugal pump for slurry.
Influence of Rail Cant on Wheel-Rail Contact Relationship and Dynamic Performance in Curves for Heavy Haul Railway
Authors: Wang Pu , Gao Liang , Hou Bo Wen
Published: August 2013

Rail cant is one of the most important track geometry parameters, which can change the wheel-rail contact relationship and then influence the dynamic interaction. Static contact geometry parameters for 75kg/m rail in contact with LM wheel tread under different rail cants are analyzed on the basis of the wheel-rail spatial contact geometry algorithm. A train (multi-vehicle)-track coupling dynamic model is established with the help of the software Universal Mechanism (UM), and dynamic performances of train-track system in curves are compared under different rail cants. The results indicate that: (1) flange contact is less likely to occur under 1/20 rail cant, which will reduce uneven wear of wheel/rail tread. (2) In the single-point contact range, when the rail cant increases from 1/40 to 1/20, the corresponding rolling radius difference, contact angle parameter, equivalent conicity and equivalent contact angle parameter all increase, which means the self-centring capacity of wheelset is enhanced and the wheel-rail relationship is improved. (3) When the train passes curves, the increase of rail cant from 1/40 to 1/20 can reduce the wheel-rail dynamic interaction and wear. Besides, the wheel-rail contact area may become bigger, which is conductive to reducing contact stress and contact fatigue failures. The results can provide reference for the design of rail cant of heavy haul railway.
Research on Evasion Control of Vehicle Anti-Collision Warning System
Authors: Wang Jian Hua , Wang Yun Cheng , Ding Hai Feng , Xie Fei
Published: August 2013

This paper put forward a kind of vehicle anti-collision warning system and put the emphasis on the research of active control. It introduced the function and composition of the system and expounded its working principle. First the safety distance model was studied based on the vehicle kinetic theory. This model contained longitudinal and lateral safety distance model. And the longitudinal safety distance model can be further divided into Safety Critical distance, Lock-in Target distance, Danger Critical distance and Limited Critical distance. Then the dangerous targets were identified and classified based on safety distance model .Finally, according to different targets, the corresponding evasion control strategy and the control flow chart were established.
Implicit Parameterization Modeling and Validation for Body-in-White of a Car
Authors: Wang Deng Feng , Ji Feng , Chen Shu Ming , Li Yu Sheng , Chen Hai Bo , Zhao Xue Mei
Published: August 2013

The implicit parametric method was briefly discussed in this paper. An implicit parametric 3D solid model and a finite element (FE) model of a body-in-white (BIW) were built up by this method. Low order natural vibration frequencies and modes, bending and torsional stiffness of the BIW were analyzed by FE calculation. A good agreement was acquired by comparing the prediction results with the test values. Results indicated that the implicit parametric model of the BIW established could be used for design and development of the BIW in concept design stage of the BIW.
Test Model of Automobile Engine Magneto-Rheological Mount Based on RBF Neural Network
Authors: Ma Jin Gang , Sheng Peng Cheng , Song Hong Ying , Liang Chun Lan
Published: August 2013

The nonlinear and hysteresis characteristics showed by magneto-rheological (MR) mount make it seem very difficult to establish a precise mathematical model. Based on the testing of MR mount dynamics, RBF neural network model can train and forecast the collected data. Analysis of comparing the predicting result of the RBF neural network model with the testing result shows that the trained RBF neural network model can exactly predict the dynamics of MR mount, and it provides some new ideas to implement the better intelligent control of the engine MR mount.
Research of Suspension Kinematics Based on Virtual Prototyping Technology
Authors: Teng Yan Qiong , Chen Chong , Yuan Ming
Published: August 2013

This paper primarily focuses on kinematics analysis of a vehicle front suspension system in ADAMS. A specific simulation platform for a front suspension is established based on the virtual prototyping software of MSC.ADAMS. Then the kinematics simulation is done following the analysis of the rationality and defect of change. The simulation results show that the analysis provides a reference for improving the performance of the suspension.
Research on Reliability Growth Technology of CNC Grinding Machine
Authors: Zheng De Rong , Fan Jin Wei , Liang Xiao Xia
Published: August 2013

Based on the collected data to carry on the analysis, found that the CNC system in the CNC grinding machine fault rate, a large part of the station, the reliability growth of CNC system is studied in the paper, CNC system parameter selecting principles of reliability growth are particularly discussed. CNC system reliability ideal growth curve is settled to CNC system reliability, Thus increasing CNC system to improve the reliability of CNC grinder machine reliability is of great significance.
Research on the Combined Forming Process for Large Curvature Outdoor Antenna Reflector Elements
Authors: Ren Shi Ming , Li Dong Sheng , Jiang Chao , Yu Cheng Long
Published: August 2013

To solve the forming problems of the outdoor antenna reflector elements with large curvature continuous surface, the combined forming process (CFP) of stretch preforming and cemented postforming was proposed. The key technologies of CFP mainly included four technologies such as the building of a surface model, the creation of the process supplement surface (PSS), the setup of the three layers aluminum plates (TLAP) locating holes and the laser cutting process to shape the outer edge of the TLAP applied in the reconfigurable multi-point die (RMPD). These key technologies were systematically researched. The measurements of the reflector elements and comparative analysis between the three processes (CFP, slitted and slotted process) were given. The results showed that the CFP had an advantage in large curvature forming, high precision forming and continuous working surface forming.
Planning and Scheduling Models for EMAS Productive Process
Authors: Tang Peng , Yu Hong Bin
Published: August 2013

This paper addresses the problems of EMAS (an engineer material to arresting aircraft on the ground) production operation that the intensity of each product was uneven and cellular concrete was not completely crumple.In order to solve the problem the development of a nonlinear planning model for EMAS production was presented. The model is based on the company it could be helpful in guiding production. The second part of the work were optimization the model and get theoretical optimal value rely on both continuous and discrete time representations.
Simulation Optimization of Multi-Objective Flexible Job Shop Scheduling
Authors: Wang Gui Cong , Li Chuan Peng , Cui Huan Yong
Published: August 2013

Current scheduling approach for multiple objective flexible job shop problem (FJSP) cannot construct a precise scheduling model and obtain a satisfactory scheduling result at the same time. To deal with this problem, a simulation optimization scheduling approach was presented which was composed of two basic modules: the Fast non-dominated Sorting Genetic Algorithm (NSGA-II) module and Witness simulation module. Firstly, a multi-objective mathematical model was found for FJSP and NSGA-II was applied to solve. Then, a set of Pareto optimal solution was obtained by NSGA-II module. In order to select the final solution from the Pareto optimal solution for FJSP, the simulation model was set up by Witness, every Pareto solution was as input for simulation model. Finally, the final solution can be selected according other performance indicators.
Camera Calibration Technique Based on HALCON Machine Vision
Authors: Liu Xue Ping , Chen Yi Chang , Pang Zu Fu
Published: August 2013

According to the perspective projection performed by a pinhole camera, taking full account of the lens radial distortion factor, the transformation between the camera coordinate has been analyzed. Combining with camera model instance of surface mount devices, the system uses Halcon machine vision software which has a powerful geometric and image computing functions to solve the camera calibration parameters and the accuracy of calibration results has been verified in practical applications. This method has advantages of computational efficiency and good value of cross-platform porting applications.
Torque Balance Mechanism Applied to Oceanographic Profiler
Authors: Chen Yong Hua , Li Si Ren , Gong De Jun
Published: August 2013

The collection of periodic profiles of oceanographic data at specific bites is a critical component of oceanographic monitoring programs. Typically, this type of work is completed by lowering instrumentation from ships but the cost of these operations has often meant that the temporal and spatial coverage of these surveys is less than ideal. As an alternative, moored profilers have been developed but the energy required moving a substantial package up and down a mooring hire can represent a major limitation. A new profiling instrument with Torque balance mechanism is under development. This device is based on a taut single point mid-water mooring system. It incorporates a small, instrumented vertically profiling float attached via an electromechanical cable to a winch integral with the main subsurface flotation. On a pre-set schedule, the instrument float carrying sensors is winched up to the surface. And it can be immediately winched down to a certain depth. To respond to the concern of energy demands, torque balance mechanism has been designed to conserve a substantial portion of the potential energy lost during the ascent phase of each profile and subsequently use this energy to pull the instrument down. Compared with the previous singlepoint layered measurement, it is useful and economica1.
The Humanoid Substation Inspection Robot Modelling Design
Authors: Wang Tong Bin , Wang Hai Peng , Qi Hui , Xiao Peng , Luan Yi Qing
Published: August 2013

The national grid power robotics laboratory has developed four generations of substation inspection robot, through the non-contact infrared acquisition equipment ReTu, image and audio information, automatic identification equipment heat defect, abnormal appearance, to staff send alarm information, and provide the basis for the equipment state inspection data. Robot modelling design especially industrial era, is an important attribute of the robot, this paper is the inspection robot for substation humanoid design important discussion, through the modern industrial design method.
Mechanical Design and Simulation of a Finger Rehabilitation Robot
Authors: Yu Jing Jing , Qian Jin Wu , Shen Lin Yong , Zhang Ya Nan
Published: August 2013

Continuous Passive Motion (CPM) has been confirmed as an effective clinical therapy for finger neurological rehabilitation. In this study a finger rehabilitation training robot is designed based on CPM rehabilitation theory. This paper presents the design and simulation of the finger rehabilitation robot. Based on the finger structure and movement trajectory analysis, OPTOTRAK CERTUS motion capture system is used to acquire trajectory parameters of normal human finger movement. Atlas method is employed to accomplish mechanism dimensional synthesis of the finger rehabilitation training robot. The feasibility of the mechanism is verified using a modeling and simulation method with SIMULINK software.
Hardware Technology Research on Ultra-High Pressure Water Jet Ship Rust Control System Based on PLC
Authors: Sun Ling , Gong Yong Jun , Zhang Zeng Meng , Wang Zu Wen
Published: August 2013

Ultra-high pressure water jet ship rust is one development direction of ship rust removal technique. In order to ensure the normal working of the system, how to control each equipment is the key-part of the design. This study presents the analytical research on hardware technology of the control system of ultra-high pressure water jet ship rust system, the analysis of the principle of frequency control system and circuit design and control circuit of PLC, by analysis the structure and principles of ultra-high pressure water jet rust, and then demonstrates through experimental test that the hardware electronic circuit works properly.
Calculation Method of Shearer Space Pose Based on Triaxial Accelerometer and Single-Axis Gyro
Authors: Guo Wei , Wang Yuan , Zhao Shuan Feng
Published: August 2013

High technology for an automatically adjustable shearer is key to improving the automation degree of a fully mechanized working face. In order to obtain the shearers pose information and coal machine angle space formulas, the shearer status under real working conditions was analyzed based on data from a triaxial accelerometer and single-axis gyro.
Motion Reliability Analysis of the PUMA560 Series Mechanism
Authors: Li Chang , Ma Xiao Gang , Han Xing , Zhao Gang Bing
Published: August 2013

In this paper, we report an effective method for motion reliability analysis of the PUMA560 series mechanism. It firstly builds a Monte Carlo parameterized 3-D virtual model of this mechanism in ADAMS, and uses VC++ to program a pseudo-random number subroutine function that conforms to normal distribution and user defining function to simulate the stochastic error distribution of the mechanism, and a universal reliability analysis program of the PUMA560 series mechanism is then developed. After multiple virtual tests on this parameterized mechanism model, a large mount of test data are obtained and statistically analyzed to calculate the motion reliability; this can evaluate the influence of different stochastic errors on the mechanism dynamic characteristics. The advantages of this new method include simplicity (no need to solve complex mathematic model) and high accuracy which make it highly promising for application in mechanism design.
Efficient Simulation of Single Degree of Freedom Servomechanisms for Automatic Machines
Authors: Vergnano Alberto , Marsala Matteo , Costantino Antonio , Balugani Federico
Published: August 2013

An automatic manufacturing system design must be optimized with a simulation including all the interacting devices. The simulation should be controlled by the real control system with a hardware in the loop approach. So the techniques for modeling the mechanisms must be effective for the model to be run without violating the real-time protocol. This paper reports a method to model the motor load by means of a reduced moment of inertia, where all the part downstream from the motor output shaft is transformed in function of the only one mechanism degree of freedom. The resulting model behaves as the real nonlinear mechanism, but it is computationally efficient since it is not ruled by the multibody 3D CAD mathematics.
Variable-Frequency Pump Controlled Piston System for Box Jacking
Authors: Pan Liu Ping , Mi Zhi Nan
Published: August 2013

In Shanghai Beihong Vehicular Undercrossing Tunnel project, a new type of hydraulic speed-regulating system, which is variable-frequency pump controlled piston system, was used. It uses variable-frequency technology to adjust rotary speed of driving motor. It can fulfill stepless speed-regulating and has good characteristic of power adaptation and energy-saving. The composition of system and working principle are stated, and mathematical model is derived. Digital simulation results show that the system has good controllability.
The Studies on Basic Element Design of Compound Material Surface Structure Models
Authors: Xu Shi Meng , Ma Run Bo , Du Jian Hua , Liu Jun Hong , Jin Qing
Published: August 2013

An important and basic issue of compound material surface analysis was raised in this paper, that was, the picking basic element which that material microstructures were well characterized according to the research subject of material. Here, the five kinds of basic element were proposed for picking, they were separately ellipse, regular triangle, rectangle, square and circle. At first, the counting methods and rules of area radio base on elements and pictures, and the formula of the merging difference was introduced, then block experiment design in modern statistics was used to pick among the five elements. At last, through experiment and analysis, the result of picking was that ellipse element was most appropriate one among five elements. Meanwhile, it was pointed in this paper with regard to the area radio of picture based on element that the approaching extent of the ellipse was most suitable among five elements.
Modelling of Multi-Axial Ultimate Elastic Wall Stress (UEWS) Test for Glass Fibre Reinforced Epoxy (GRE) Composite Pipes
Authors: Majid M.S. Abdul , Afendi M. , Daud R. , Amin N.A.M. , Mohamad A. , Cheng E.M. , Gibson A.G.
Published: August 2013

This paper describes the modeling of multiaxial ultimate elastic wall stress (UEWS) at room temperature for glass fibre reinforced epoxy (GRE) composite pipes. The model developed, predicts the stress-strain response caused by the combined, static and cyclic of UEWS loading taking into effects of transverse matrix cracking within the laminates. The procedure, although not a standard method, seems to provide a good alternative to the current raw materials' re-qualification procedure delineated in ISO 14692 through ASTM D2992. The effective transverse and shear modulus of the lamina due to increasing presence of transverse matrix cracking were estimated. Classical laminate analysis was then applied to compute the corresponding ply properties as a function of increasing stress and strain. The model shows a good agreement with the experimental results of multiaxial UEWS tests on ±55° filament wound glass-reinforced epoxy pipes.
Finite Element Formulation for the Vibration Analysis of Couple-Stress Continuum
Authors: Su Wen Zheng
Published: August 2013

This paper proposed a finite element formulation to analysis the vibration of couple-stress continuum. A four-node discrete couple-stress element relaxed the requirement of C1 continuity is developed. This element is modified by a bubble function, based on the classical four-ode Lagrange element. The element includes the internal bending constants and the internal initial moment of rotation. Numerical examples show that the present FE scheme is accurate for the eigenvalue analysis of couple-stress continuum structures, especially for the low order frequency analysis.
Effect of Sulfur and Chlorine on the Speciation of Mercury in Coal
Authors: Ding Jian , Liu Lang , Liu Qing Cai , Yang Jian , Gao Wei , Kong Ming
Published: August 2013

Mercury and its compounds which formed in the coalcombustion process have a serious effect on the environment. Four coal samplesin Chongqingwere selected to study on the occurrenceform of mercury, as well as the effect ofsulfur, chlorine on mercury speciation. Results showed that the mercury contentin coal ranged from 257 ng/g to 332.7 ng/g，with sulfur, chlorine content increased，the total mercury content increased，too. The sulfur content in coal ranged from 1.52% to3.54%, the mercury in sulfide and sulfurhave a good correlation, and square of the correlation coefficient (R2)between them is 0.9883. The chlorinecontent in coal ranged from 0.05% to 0.15%，the mercury in organic compound and sulfur have a good correlation，andsquare of the correlation coefficient (R2) between them is 0.9639.
The Perturbation Method for Stability Analysis of Uncertain Structures
Authors: Ji Chang Rui , Ni Zao
Published: August 2013

This paper is concerned with the structural stability problem involving uncertain-but-bounded parameters, specified as bounds on these parameters. This produces interval stand and geometry stiffness matrices, and the problem is transformed into a interval buckling eigenvalue problem in interval mathematics. The perturbation method is proposed to determine the lower and upper bounds on the buckling eigenvalues and due to uncertain-but-bounded parameters. Moreover, the critical load of the uncertain structure can be obtained. The effectiveness of the presented method was demonstrated by comparison with conventional stability theory, using a typical numerical example.
Modeling of Melatonin Behavior in Major Depression: A Fuzzy Logic Modeling
Authors: Azizi Aydin , Osgouie Kambiz Ghaemi , Rashidnejhad Sajad , Cheragh Mostafa
Published: August 2013

According to the world health organization, major depressive disorder (MDD) is considered as the fourth main cause of death and premature weakness in the whole world. Abnormality in the hormones and neurotransmitters level is the one of the main factors which may result in this disorder. In this article melatonin is chosen among these hormones, which is the most implicated to control sleep and depression. Because the measurement of melatonin is crucial important, the fuzzy logic approach as the mathematical method is utilized to making melatonin behavior model. In this paper, two effective factors on melatonin are modeled by fuzzy logic. This model is only a part of our project which is performed for modeling of the major depression.
Fuzzy Logic Based Set-Point Weighting for Fractional Order PID Control
Authors: Karthikeyan R. , Pasam Sreekanth , Sudheer S. , Teja Vallabhaneni
Published: August 2013

Differentiation and integration of non-integer order have drawn increasing attention in research community. Fractional order dynamic systems have been recognized as effective tool for characterizing the real world phenomena. This may be implemented by using different control structures in which a fuzzy mechanism is adopted to tune the parameters by using Ziegler-Nichols method. Fractional-order PID control is the development of general integer-order PID controller. This paper proposes the basic framework of fractional order dynamic system with fuzzy weighted set-point. Comparisons are made with PID and FOPID controllers for first and second order systems. The response shows the superiority of the fuzzy set-point weighting methodology over the other methods.
A Vehicle Rollover Warning Approach Based on Neural Network and Support Vector Machine
Authors: Du Xiao Ping , Lu Lian Tao , Sun Hua Mei , Li Yun , Song Jiao Jiao
Published: August 2013

This paper studies the vehicle rollover warning based on the vehicle running state parameters which are easy for collecting. By taking advantages of neural network and support vector machine, this paper analyzes the probabilities of the vehicle rollover in the scenario of single lane change and establishes a warning model which could predict the rollover 0.4 seconds in advance for a particular type of vehicle. According to the validation experiments on Ve-DYNA which is a vehicle dynamic simulation software, the results validate the warning models good performance with the maximum error as 0.04 second and no missing cases which indicates its validity for rollover warning.
Numerical Analysis of Multi-Layer Continuous Diffusion Furnace Door Gas Curtain
Authors: Zhang Sheng Cai , Li Gui Qin , Lu Li Xin , Mitrouchev Peter , Wang Cheng Gang
Published: August 2013

Thermal load oozing out through the door is the main aspect of the temperature zone heat loss of continuous diffusion furnace. In this paper, multi-layer gas curtain is designed to seal the furnace door in order to reduce heat loss and ensure furnace temperature to meet requirements in regulation. The unsteady flow is presented to better reflect complex time-varying velocity and temperature of curtain gas. Flow and temperature field of continuous diffusion door with multi-layer air curtain are numerically analyzed by Renault model and experimentally tested. And the influence parameters are tuned and optimized based on the theoretic numerical analysis and experiment results.
Design of Locomotive Network Test Platform Based on WorldFIP
Authors: Zhao Ke , Ju Yan Jie , Chen Bao Jun
Published: August 2013

The characteristics of real-time, synchronization, flexibility and reliability make WorldFIP Fieldbus suitable for locomotive network communication. This article describes the design of locomotive network test platform based on WorldFIP both hardware and software perspective. World FIP station can make date communication by writing applications in LABVIEW environment which verifies the correctness and reliability of the test platform. The design of test platform plays an important role for in-depth understanding of foreign locomotive core technology and lays a solid foundation for accelerating the domestic heavy-haul locomotive and development of products with independent intellectual property rights.
Formalism for Determining the Force and Torque on a Sphere Moving in a Quiescent Fluid at Arbitrary Reynolds Numbers
Authors: Chittajallu S.N.S.H. , Ramamohan T.R. , Thundil Karupparaj R.
Published: August 2013

There are formalisms available in the literature for determining the force and torque on a particle moving in a fluid at zero and low Reynolds numbers. The formalism for determining the force and torque on a particle in a fluid at arbitrary Reynolds numbers has only recently been developed, Magnaudet [. This paper focuses on developing a formalism for the special case of a sphere moving in a quiescent fluid at arbitrary Reynolds numbers using the formalism of Magnaudet.
Runway Pavement Reconstruction with Full Material Recycling: The Case of the Airport of Treviso
Authors: Bocci Maurizio , Manganaro Andrea , Stramazzo Virgilio , Grilli Andrea
Published: August 2013

This technical paper shows the innovative approach used in the rehabilitation of the runway of the airport of Treviso. Treviso is located in North Italy and lies about 40 km far from Venice. For this reason, the airport of Treviso may be considered the second airport of Venice and receives the low-cost companies. In order to minimize the environmental impact of the rehabilitation project, the materials coming from the demolition of the old runway pavement were completely recycled in the new runway pavement. Several recycling techniques were used such as the cement stabilization of soil, cement treatment of milled cement concrete and cement-bitumen treatment of reclaimed asphalt. This paper shows the technical application of scientific knowledge on pavement recycling developed in Italy in the last decade.
Finite-Element Analysis of Effect of Wide-Base Tire on Tire-Pavement Noise
Authors: Yang Jia Sheng , Fwa Tien Fang , Ong Ghim Ping , Chew Chye Heng
Published: August 2013

This paper investigates the effect of tire width to tire-pavement noise. A tire-pavement noise numerical model in the near field has been developed using the three-dimensional finite-element method, and performed in the standard FEM code package ADINA. The model is composed of two main components: a rolling tire pavement interaction model and a sound propagation model. The tire width studied ranged from 180 to 210 mm. The computer simulation model was calibrated and validated using experimental results made available from past research. From the simulation results, it was found that tire width has a noticeable effect on tire-pavement noise. In particular, it was found that tires with wider base were found to produce higher noise levels.
The Impact Study of the Resistance to Ultraviolet Radiation Aging Agent on the Airport Road Surface Performance with the Modified Asphalt
Authors: Ye Song , Shao Xian Zhi , Wang Lie Ping
Published: August 2013

According to the test results of before and after the aging of asphalt performance,we analyse the dosage changes of the HALS anti ultraviolet ageing agent to improve SBS modified asphalt ultraviolet light resistance aging performance role. The test results show that GW-944 can better improve the ultraviolet resistance of asphalt aging performance, i.e., original sample asphalt have no other negative influence in a certain extent, and at the same time,also improve asphalt fatigue performance, low temperature performance and high temperature performance after the light aging, but the performance improvement needs to be in the right dosage range;Therefore,to the SBS modified asphalt we can use such ultraviolet aging agent for performance improvement,the research achievement for the airport asphalt pavement UV aging provide a technical basis for effective prevention and treatment.
Use of High Percentage of Recycled Concrete Aggregate in Aircraft Stand Rigid Pavement
Authors: Ho Nyok Yong , Lee Yang Pin Kelvin , Fwa Tien Fang , Tan Jun Yew , Lim Wee Fong , Teoh Eng San , Tan Steven , Chew We Sen
Published: August 2013

This paper describes a study that was carried to investigate the use of recycled concrete aggregate (RCA) in aircraft stand rigid pavement at the Singapore Changi Airport. The study aimed to recycle the concrete waste generated from the demolition of the existing aircraft stand rigid pavement to reconstruct the aircraft stand rigid pavement. The study was a continuation of a previous work in which 20% of RCA was used in the rigid pavement. In this study, laboratory tests were carried out to evaluate the use of up to 100% of RCA in rigid pavement. The test properties that were evaluated include compressive strength, flexural strength, drying shrinkage and resistance to chloride ingress. The study showed that it is viable to incorporate high RCA content in concrete.
Structural Response Analysis of Highways under Heavy Loads
Authors: Zeng Ke Hao , Guo Run Hua , Li Hong Xue
Published: August 2013

As China's economic development, substantial growth in traffic, the importance of subgrade in road construction is escalated. Under the vehicle load, subgrade deformation will continue to accumulate and ultimately lead to subgrade permanent deformation. Excessive permanent deformation of subgrade soil will cause enormous economic losses, especially in rutting deformation, and have a direct impact on road performance in safety and comfort. Meanwhile, permanent deformation of subgrade will affect the structural performance of pavement, causing the other forms of damage. For example, the emergence and strengthening of reflective cracking, or accelerated fatigue failure because of too heavy tensile strain (or tensile stress) on the underside of the surface layer, and then caused great negative impact on the pavement structure and service performance. This article examines the role of high-speed heavy traffic load characteristics, and set up finite element model analysis for semi-rigid road structure, the most widely used internal road style, to obtain the mechanical response characteristics under high-speed heavy traffic loads.
The Effects on Pavement Performance of AC-20 Asphalt Mixture Addicted with Polyester Fiber or Anti-Rut Agent
Authors: Yi Wen , Xie Zi Xin
Published: August 2013

The pavement performance of AC-20 asphalt mixture added with certain polyester fiber or the anti-rut agent are studied in this paper. By analyzing the high temperature stability and water stability of asphalt mixture through the indoor test, it can be concluded that: after adding polyester fiber and anti-rut agent, the pavement performance of asphalt mixture has the remarkable enhancement, it can be better adapted to our heavy traffic requirements.
Analysis of Whole Weathered Granite Improved Soil Subgrade Dynamic Response
Authors: Yi Wen , Pan Teng , Chen Ai Jun
Published: August 2013

In this paper, strain and displacement for FLAC3D numerical simulation analysis of the whole weathering granite improved soil subgrade in train dynamic load of the stress is conducted, subgrade under repeated load test data and software simulation data is contrasted, the center of subgrade vertical settlement and the center of the subgrade stress change situation is researched.Through the research proves the whole weathering improved soil subgrade can ensure the high-speed safety, comfort and use requirement.
Evaluating the Properties of Bitumen Stabilized with Carbon Nanotubes
Authors: Steyn Wynand JvdM , Bosman Tanya E. , Galle Samantha , van Heerden Jacques
Published: August 2013

The aim of this paper is to investigate the rheological properties of Multi-Walled Carbon NanoTube (MWCNT) enhanced bitumen. The rheological properties of bitumen samples with a range of MWCNT applications are evaluated. The shear complex modulus of the samples increased after ageing, and also increased as the percentage of MWCNTs increased. The viscous component of the complex shear modulus was found to be dominant at higher temperatures, but as the concentration of MWCNTs increased, it was found that the elastic portion started to dominate at higher temperatures. At higher temperatures a change in the phase angle was found, with increased concentrations of MWCNTs causing a decrease in δ, representing a more plastic sample. It is shown that addition of MWCNTs as a modifier did not increase the cracking resistance of the bitumen. Thus, if fatigue cracking is of concern in a certain area it is not recommended to use MWCNTs as a modifier. As the quantity of MWCNTs increased, the temperature at which rutting would start to occur, increased.
Lab Evaluation of French High Modulus Asphalt Mixture (EME2) and Preliminary Recommendation of its Application in China
Authors: Li Hao , Li Xiao Yan , Guan Yong Sheng , Jia Yu
Published: August 2013

This paper summaries the characteristic of French high modulus asphalt mixture (EME2), does a full set of performance evaluation through French test methods specified in LPC Bituminous Mixtures Design Guide and current test methods in China, and puts forward the preliminary recommendation of French high modulus asphalt mixture (EME2) application in China. It will provide technical reference to help to develop market of the French high modulus asphalt mixture (EME2) application in China and propose a new road building material for the construction of our highway.