bluuebunny/crossref_metadata_2025 huggingface dataset:
Bond-Slip Constitutive Relationships of the CFRP/Concrete Interface
Authors: Wu Xiao Yong , Wang Hui
Published: February 2014

In consideration of the light weight, high strength, corrosion resistance and construction is convenient of carbon fiber reinforced polymer (CFRP), using CFRP to strengthen structure is becoming more and more widely. However, there is no commonly accepted understanding of the constitutive relationship of the bonding shear stress and slip between concrete and CFRP bonded interface, especially the decline of the constitutive relation is more difficult to measure accurately. An aim of this paper is to improve the experiment to explore bond stress and slip (τδ) constitutive relation of the bonding interface, strive for the experiment to measure the τδ constitutive relation curve of CFRP-concrete interface. Double pull test was proposed with the improved specimen, using the horizontal load, eliminate additional bending moment influence and improve the experimental accuracy. 17 specimens were tested to measure the τδ curves, according to the features of the constitutive relation curves, the mechanical characteristics of the bonding interface was further analysised.
Effect of Dowel Looseness on Response of Jointed Concrete Pavements Using Three-Dimensional Finite Element Analysis
Authors: Sii How Bing , Chai Gary W. , van Staden Rudi , Guan Hong
Published: February 2014

This paper evaluated an effect of dowel looseness on response of jointed concrete pavement using 3D finite-element analyses of rigid pavement systems that relies on an embedded formulation of a beam element. This embedded element allows the efficient modelling of dowel looseness using nodal contact approach and permits the dowels to be exactly located irrespective of the slab mesh lines. These studies indicate that significant reduction in load transfer efficiency and increase in both slab and base course stresses can be expected due to small gaps varies from 0.25 to 1.25mm between the dowels and the slabs. For the worst case the LTE were reduced to 11.3% and 11.6% respectively for single wheel loading and odd dual wheel loading case while there were voids present at the base course layer for 1.25 cases 4.
Structural Behaviour and Comparison of CGF Panels
Authors: Boscato Giosuè , Dal Cin Alessandra , Destro Riccardo
Published: February 2014

A CGF Panel (Concrete Glulam Framed Panel) is a concrete panel with a glued laminated timber frame. The experimentation on this new construction system at LabSCo (Laboratory of Strength of Materials) of IUAV University of Venice, inspired a wide research on buildings made of this construction system investigating in different aspect of building behaviour: particularly about mechanical property of the materials, mechanical of the system and building physics. This paper presents the results of quasi-static in-plane tests on single panel and configurations of some different panels. The tests in the laboratory are used for measuring the in-plane strength and stiffness of individual panels and wall sections consist of some panels in order to verify and measure the behavior of the connections between the various parts of the single panel and the connection between the panels. Thanks to the results obtained it was possible carry out the FE model to calibrate the characteristics in relation to experimental data. Finally, in order to compare this constructive system with the well known X-lam systems, on the basis of the calibration of the models we were able to set up a comparable FE model with those of the X-lam wall described in the publication: "Quasi-Static and Pseudo-Dynamic Tests on XLAM Walls and Buildings " inherent in the SOFIE project coordinated by the CNR-IVALSA (Italian National Research Council - Trees and Timber Institute)
Analysis of Obstacle of Development and Application that Coal Gangue Used in China Road Engineering
Authors: Ma Qing Qing , Liu Hua
Published: February 2014

Coal gangue as road engineering material can sovle the problems of energy saving and environmental protection.Experimental datas of grain size distribution,crushing value,slake durability index,expansivity,liquid limit index,plastic limit index and water absorption showed that its own characteristics are in line with the requirements of road engineering materials. There are successful cases of application of coal gangue in road constructions both here and abroad. Principal component analysis is used to identify four major factors of coal gangue applications in road construction.Put forward 5 urgent problems to be solved and give a few corresponding suggestions.
Cathodic Arc Evaporated CrAlSiN Coatings with Multi-Cycle Depositions
Authors: Chang Yen Shuo , Ho Wei Yu , Tsou Po Yi , Lin Cheng Liang
Published: February 2014

CrAlSiN film possesses superior hardness, good thermal and chemical stability due to its multi-component constituents and unique structure. To further explore the reproducibility and scale-up thickness of CrAlSiN coatings, the multi-cycle deposition of CrAlSiN coatings by cathodic arc evaporation was conducted in this study in order to evaluate the effect of coating thickness on the properties of CrAlSiN coated materials. Two targets of Al0.8Si0.2and Cr (99.99 at%) along with altering deposition cycles were used for the coatings. The results showed that the CrAlSiN coatings had an increase in hardness up to 4700 HV50gconfirmed by Vickers hardness tests. Surface roughness of the coatings could be dramatically improved by erosion tests as a result of removing droplets and higher asperities on the coating surface.
Influence of Niobium or Molybdenum in Titanium Alloy for Permanent Implant Application
Authors: Marsumi Yuswono , Pramono Andika Widya
Published: February 2014

Titanium (Ti) alloy metal has been used for permanent implant in the human body. Its high strength and hardness take place due to the β phase formation at room temperature. Ti-6%Al-6%V alloy is most popular, of which vanadium (V) content is used as the β phase stabilizer. However V can induce allergic reaction from the body. V can be substituted by other element, such as Mo and Nb. Microstructure observations for Ti-6%Al-6%Mo and Ti-6%Al-6%Nb alloys show that β phase exists as matrix having good workability at room temperature. After preheat at 1000°C, no cracking failure occurs during forging and rolling treatment. Thermal spray method is used for CaPO4 surface treatment. A CaPO4 layer on the alloy substrate forms after the molten CaPO4 is hot sprayed on to the alloy substrate surface. Corrosion test results indicate that the increase in Mo or Nb content up to 6% leads to the increase in corrosion resistance.
Influence of the Polymer Modified Mortar Coating on Gas Permeability of Steel Fiber Concrete
Authors: Zhao Wei Xia , Wang Wan Peng , Zhao Kang , Cai Xi Nan , Niu Guan Yi
Published: February 2014

The gas permeability of polymer modified mortar coating add steel fiber concrete compound structure was studied by thickness-wall cylinder structure experiment. The coatings were characterized by scanning electron microscope,energy-dispersive X-ray spectroscopy.the gas permeability of steel fiber concrete is 6.85×10-15 m2. applying the coating can reach 10-17 m2. The intrinsic gas permeability of polymer modified cement based materials is 1.36×10-17 m2 using regression calculate analysis method .Coating thickness is constant, raw materials composition and structure is the fundamental factors affecting permeability.
Application of Incremental Forming in Sheet Metal Bending Process
Authors: Dang Xiao Bing , He Kai , Wei Shu Guo , Li Jiu Hua , Du Ru Xu
Published: February 2014

Based on the thought of incremental forming, a new kind of sheet metal bending process has been described and investigated in this article. The software of the control system for the specific machine is developed combining motion control card and servo motors. Both single point and multi-points bending are taken into consideration from experimental and finite element analysis. Curved sheet and hyperbolic sheet metal are examined through experiments to extend the application for more smoothed and complicated curved sheet metal. The effectiveness of the process to deal with complex curved sheet metal is shown by all the experiments.
EWR Research on PZT Excited Discharge Channel Compression Micro-EDM
Authors: Du Lian Ming , Zhang Qin He , Zhang Jian Hua
Published: February 2014

In micro-EDM machining process, the debris of materials is difficult to be removed form the discharging gap. This problem leads the instability of discharge state, and reduces the efficiency of discharge machining. A new method of PZT incentive synchronous compression discharge channel micro-EDM is developed based on the inverse piezoelectric effect of PZT ceramics, driving by a spark discharge and PZT sync pulse power. The composition of the system is described and many experiments have been done and the effects of parameters on electrode wear ratio (EWR) have been analyzed in this paper. The results indicated that increasing the voltage and width of pulse can lower the rate of electrode wear, increase the efficiency of electric-machining, while increasing the frequency of discharge pulse can lead the increasing of EWR.
Experimental Study on the Grinding Concentration of Dahongshan Copper
Authors: Wang Qing Hong , Zhuang Gu Zhang , Wang Chun Mei , Xie Hai Yun
Published: February 2014

In order to provide evidence for the adjust of grinding concentration, we have did the experimental study on the grinding concentration of Dahongshan copper, the tests indicate that the best grinding concentration of Dahongshan copper is 70%. Generally, the advantage range of fine grinding concentration is from 65% to 75%,so we choose the acceptable range of grinding concentration from 65% to 70% .
Lapping Parabolic Parts Using the Bending Lapping Tool
Authors: Shang Chun Min , Zhang Dong Mei , Yang Jian Dong
Published: February 2014

Lapping the parabolic work-piece with the lapping tool in bending method is a new technology, which has some good characters such as low cost, scope broad, easy operation, and high precision. The lapping tool is formed by the means of bending and forming with solid abrasives on it in the experiment. The experiment shows that parabolic workpiece can be lapped using this method. The experimental result indicates that the work-piece face shape precision is high with the lapping tool, the maximal error is 0.0881mm and the minimal error is-0.0011mm, and lapping efficiency is high and the cost is low.
Synchronous Optimization of Clamping Force and Cutting Parameters for Thin-Walled Parts
Authors: Xue Lin Feng , Chen Wei Fang , Feng Ting , Ma Wan Tai
Published: February 2014

Machining accuracy of thin-walled parts is easily affected by clamping and cutting deformation due to its poor stiffness. In this paper, synchronous optimization method of clamping force and cutting parameters is presented based on GA and FEM. The optimization objective is to minimize the maximum deformation and to improve the machining efficiency. GA is used to optimize cutting parameters and clamping force, and FEM is used to predict the machining deformation of the thin-walled workpiece. Finally, taking a titanium alloy thin-walled part with irregular shape as an example, the optimal clamping force and cutting parameters at every cutting position are obtained to demonstrate the feasibility of the method.
Beneficiation of Collophanite from Ores by Reverse Flotation
Authors: Zhao Jun Li , Ge Ying Yong , Yang Zhi Chao , Zeng Li Ming , Zhu Jing
Published: February 2014

A phosphate rock containing MgO 7.95% and SiO29.64% has fine dissemination size, which is from Yichang city in Hubei province, China. Technical conditions of the ore were investigated by performing reverse flotation, which adopted anion collector to flotate magnesium. The results showed that under H2SO43500g/t, H3PO42500g/t, MG-2 3200g/t, phosphate concentrate with P2O531.91%, MgO 0.97% and recovery of 88.71% were obtained by employing the process of close-circuit reverse flotation.
Flotation Tests on Ultra-Fine Oolitic Cellophane
Authors: Jin Wan Chao , Zhou Ping , Xie Hai Yun , Tan Wei , Yang Bo Wen
Published: February 2014

The collophane is in oolitic structure, and associates with the gangue intricately; and hence a good concentrate in performance is hardly produced only by rinsing, in order to achieve a full liberation, fine-grinding is needed for the cellophane. Based on the results of both direct and reverse flotation tests, it shows that reverse flotation is effective in the benefication of the apatite to a certain extent. When reverse flotation is used to dress the run-of-mine which contains 26.95%P2O5, a concentrate containing 32.69% P2O5 can be obtained at a recovery of 84.99%.
On the Feasibility of Applying Electric Field to Increase Oil Recovery in Old Oil Field
Authors: Nie Chun Hong
Published: February 2014

This paper has discussed the characteristics, roles, feasibility and obvious effects of the technology by applying electric field to enhance oil recovery when the oil field is in high water cut stage and super high water cut stage. In view that most oil wells in old oil field have entered into the super high water cut production, the remaining oil in the main reservoir is in fragmented distribution with poor results of water injection and new reserves of oil mostly have a low penetration rate and are thin layers of poor physical properties, the use of the direct current field in period of high water cut is the best policy to achieve high and stable yield and is fairly promising.
Study on the Concentration of a Carbon-Containing Oolitic Low-Grade Collophane
Authors: Jin Wan Chao , Zhou Ping , Xie Hai Yun , Tan Wei , Yang Bo Wen
Published: February 2014

Apatite is a valuable component of the collophane taken from Yunnan, as it is in the shape of oolith and contains a lot of carbon, and hence an effective benefication of the apatite is difficult to be occurred by means of concentration. Based on the results of both direct and reverse flotation tests, it shows that reverse flotation is effective in the benefication of the apatite to a certain extent. When reverse flotation is employed to treat the run-of-mine at a grade of 18.77%, the concentrate containing P2O5 24.04% at a recovery of 62.58% can be produced.
The Study of Optimization Experiment on Injection Timing and Injection Pattern of Binary Compound Flooding after Polymer Flooding of Heavy Oil in Offshore Field
Authors: Li Dong Liang , Zhang Jian , Song Kao Ping , Tang En Gao , Huang Bin
Published: February 2014

In this study, simulated the reservoir conditions of SuiZhong 36-1 offshore field, we did the research on the optimization experiment of injection timing and injection pattern of the binary composite flooding after polymer flooding. After polymer flooding the launching of binary compound system is studied at the different injection timing (namely when the water content ratio is 0%, the lowest point , 70% and 95% after polymer flooding), the results show that the final recovery efficiency is the highest while directly conversion after polymer flooding, followed is conversion while the water content ratio is the lowest ,70%and 95%..Also compared the impact results of injection of binary complex system in different injection ways on oil displacement effect, the result shows that the injection of 0.3 PV binary complex system is better than the system of polymer injection 0.05 PV + 0.2 PV binary compound system + 0.05 PV polymer binary and 0.1 PV polymer + 0.2 PV binary compound system. But the impact of changing injection way on the ultimate recovery is not big, do before and after protection in a polymer slug is more advantageous to control the cost of industrialization, to maximize the overall benefits of oilfield development.
Intensity Variation of the Electromagnetic Emission (EME) of Rock Masses Failure under Dynamic Load
Authors: Wan Guo Xiang , Wang Qi Sheng , Zeng Wen Biao
Published: February 2014

Incident frequency of wave on the intensity variation of the EME had been studied in this paper, based on failure test under dynamic load of Granite. The results show that the intensity of EME gradually attenuates with increasing of incident frequency of wave. The intensity of EME with the joint stiffness; the intensity of EME increases with viscosity coefficient; the variation of the EME with viscosity coefficient is influenced by frequency. The research outcomes are in agreement with others experimental results.
Properties of Hand Woven Cotton for Thai Children Standard Sizes Models
Authors: Jatuphatwarodom Srikanjana
Published: February 2014

The objectives of this particular research were testing covering materials for models and making Thai childrens standard sized models. The covering materials chosen for the models were hand-woven cotton fabrics from four sources. The sub materials were non-woven pressed fabrics. Data were statistically analyzed in terms of percentage, mean, standard deviation, and One way ANOVA. In relation to the covering materials, it was found that the differences of the tensile strength on Warp and Weft, and the static puncture test on hand-woven fabrics from different sources both before and after needle stitching were statistically significant at the level of .05. Concerning the developed prototypes of the fiber-glass models covered with material from Narathiwat Province which were for the 5-year, 7-year and 9-year old models, the satisfaction with the use of all three was an average of 2.40, or very good.
Research of High Grade HIC-Resistant Pipeline Steel
Authors: Gao Xiu Hua , Li Jing , Li Chuang , Liang Yan , Du Lin Xiu , Liu Zhen Guang
Published: February 2014

Carry out research on the processes, structures and properties of the X70 corrosion-resistant pipeline steel and analyze the mechanism of the hydrogen induced cracking. The results show that: the developed steel not only has excellent mechanical properties, but also has good resistance to H2S corrosion. Microstructure of the X70 corrosion-resistant pipeline is mainly the acicular ferrite and granular bainite, with well-closed formation and fine grains. Hydrogen Induced Cracking (HIC) begins with the appearance of the hydrogen blistering on the specimen surface, and cracks generated by the hydrogen blistering gradually extend inward from the surface along the grain boundary, diffuse inside the specimen gradually, and finally form hydrogen induced cracking.
Gas Turbine Engines Lubrication System Design
Authors: Zuo Yu Yu
Published: February 2014

There are many reasons for having a lubricant within the engine besides that of reducing friction. However scrupulously clean the engine is maintained, there will always be a small amount of dirt or impurities that find their way inside. That dirt must be removed before it can cause damage to bearings or block small oil passageways. The oil can be used to keep the engine clean by carrying dirt to the oil filter where it is strained out and where it remains until replacement of the filter. The majority of the bearings within the engine are manufactured from steel, a metal which would soon oxidize itself if it were not prevented from doing so by a liberal coating of oil, thus the lubricant will also minimise corrosion inside the engine.
System Modeling and Characteristic Analysis for a Permanent Magnet Orbital Friction Vibration Actuator Used in Orbital Friction Welding
Authors: Xu Fei , Hu Jian Hui , Zou Ji Bin , Li Yong
Published: February 2014

This paper describes the structure and operational principle of OFVA used in OFW, and the electromagnetic force characteristics are obtained by FEM (finite element method) and measurements. The coupled magnetic field-circuit-motion simulation model which is driven two-phase symmetric sinusoidal voltage sources is established and the motion trajectory is simulated.
Study of Analysis Method for Hertz Contact Problem in Friction Drive
Authors: Ling Ling , Yi Ju Qun
Published: February 2014

In order to deal with Hertz contact problem of friction drive in continuously variable transmission (CVT), two methods were proposed in this paper. One is a numerical computation method by MATLAB to solve the elliptic integral equations of Hertz contact, while the other is a finite element method (FEM) which uses the ANSYS Workbench to calculate the point contact between two elastic bodies. The computation results of Hertz contact problem of friction drive in a new CVT proposed by our research group show that, compared with a look-up table method, the numerical solution of MATLAB has many advantages such as high precision and less computational cost, while the finite element method has more simplicity and better visibility. The present methods can provide a reference for the solution of Hertz contact problem of common friction drive.
Thermal Analysis of Blood Pump Rotor System
Authors: Sun Kang , Wu Xin , Wang Jun Feng , Ge Ji , Yun Zhong
Published: February 2014

In order to study the heat conduction, convection and heat flux density of blood for blood pump rotor system,and established the three-dimensional model of the blood pump rotor system in Solidworks, and then will establish a model to lead the finite element analysis in ANSYS Workbench, thermal analysis, the result of analysis is temperature distribution and heat flux distribution and temperature deformation figure of the blood pump rotor system. Through the study, the rise of temperature of the blood pump rotor system meets the requirements, and The structure design is reasonable;the blood pump rotor system overall deformation is small,but it’s not affect the normal work of the blood pump, It could provided data to support the optimization design of the blood pump rotor system.
Transient Thermal Analysis of Wheel-Mounted Brake Disc of Gray Cast Iron
Authors: Xia De Mao , Xi Ying , Zhag Pan , Ye Qian
Published: February 2014

Determining how to accurately calculate the thermal loads and boundary conditions are the most critical issues in the thermal analysis of the brake disc. The heat flux acting on the disc surface was got by the uniform wear theory with consideration of the cover angle of pad. The result shows that: the heat flux determined by uniform wear is not only related to the braking time but also radial distance; the convective heat transfer coefficients will decrease by the raise of the time; the cover angle of pad increases at first and then decreases, while the heat partition coefficient is in the opposite situation; the results determined by uniform wear with the consideration of the cover angle of pad is more close to that calculated by energy balance law.
Phase-Shifted Bragg Gratings Based on Hybrid Plasmonics Structure
Authors: Xiao Jing
Published: February 2014

An ultra-compact Bragg grating based on hybrid plasmonics is presented to achieve efficient wavelength selection by a resonate cavity, which is promising for many applications in integrated telecommunications systems.
A Novel System for Fine Particle Concentration Measurement
Authors: Guo Ming Ru , Lou Wen Zhong , Ren Li Na , Lu Yu Fei
Published: February 2014

It is important to monitoring the fine particles (PM2.5) in atmosphere as it threatens the public health all over the world. But the existing concentration measuring devices have shortcomings in speed and range. A novel fine particle concentration measuring system based on the ultrasonic attenuation was designed in this paper, which could help to solve the problem. Firstly the mechanism of ultrasonic attenuation in dust cloud was studied to verify the relationship between the concentration and the ultrasonic attenuation. Then the novel concentration measuring system was designed. The micro ultrasonic transducer array was introduced into the system, so the system can be sensitive as well as small. Finally, experiment was conducted to check the performance of this measuring system, and the results show that it could realize measurement quickly.
Surface Effects on the Buckling of Nanowires Based on Modified Core-Shell Model
Authors: Yao Hai Yan , Yun Guo Hong
Published: February 2014

In this work, surface effects including surface elasticity and residual surface stress on the buckling of nanowires are theoretically investigated. Based on modified core-shell (MC-S) model, the effective elasticity incorporating surface elasticity effect of the nanowire is derived, and by using the generalized Young-Laplace equation the residual surface stress is accounted for. The ratio of critical load with and without surface effects are obtained for a nanowire loaded in uniaxial compression. Taking silver (Ag) nanowires as an example, the analyzed results demonstrate that the influence of surface effects on the critical load of buckling becomes more and more significant as the nanowire diameter decreases. Moreover, it is shown that the influence of residual surface stress on the critical load is more prominent than that of surface elasticity.
The Drug Loading Thermodynamics Mechanism of Eight Cationic Drugs’ Adsorption onto Ion Exchange Fiber
Authors: Yao Hui Min , Zhu Jun Yi , Xia Guang Qing
Published: February 2014

The adsorption of eight drugs (Log P range from-2.64~8.98) was investigated by performing batch adsorption experiments. Experiments were carried out as function of contact time, initial concentration and temperature (25-60°C). The equilibrium adsorption data of drugs on ion-exchange fiber were analyzed by Langmuir and Freundlich models. The results indicate that the Langmuir model provides the best correlation of the experimental data. The results indicate that ion-exchange fiber is suitable as drug carriers for loading drugs.
The Desalination Device Using the Rising Liquid Film on the Microscale Fluted Surface of Horizontal Tubes
Authors: Li Yan , Liu Sai Sai , Luan Jian , Wang Qi Lin
Published: February 2014

With the development of marine economy in our country, many islands are faced with the bottleneck of lack of fresh water. The purpose of this paper is to calculate the efficiency parameters by designing the multi-effect desalination device and procedure, which is based on the parameters from the single effect desalination experiment of the rising liquid film on the microscale fluted surface of horizontal tubes. Compared with the vertical tube falling film desalination in the same working condition, the desalination using the rising liquid film on the microscale fluted surface of horizontal tubes can reduce the initial evaporation pressure and steam temperature. This improvement will be more conducive to the application of marine equipment, and provide technical support to resolve the lagging problem of islands infrastructure.
Nomenclature
Long-Range Air-Hole Assisted Subwavelength Waveguides: Towards Large-Scale Photonic Integration
Authors: Zhou Wen , Huang Xu Guang
Published: February 2014

A novel air-hole assisted metaldielectricmetal (MDM) waveguide has been proposed and numerically demonstrated. It has excellent characters including subwavelength mode confinement, chip-scale long propagation length, highly efficient direct bends with compact footprints, and high waveguide isolation with tiny center-to-center separation at the wavelength of 1.55 μm. To prove that the hybrid waveguide could be an ideal candidate for large-scale photonic integration, its characters are all compared with the silicon, photonic crystal, surface plasmon polariton based waveguides.
Simulation Research on Micro-Milling Process Based on ABAQUS
Authors: Xu Lin Hong , Chen Shu Lei , Lei Bo , Rao Xiao Shuang
Published: February 2014

With the more and more micro mechanical parts are coming into the use of many fields, the micro machining is becoming a new tendency in the future manufacture industry. As a kind of common machining method, milling is also favor in the micro-fabrication field since its good machining precision and forming ability. In this work, cutting process simulation of micro-milling was done to analyze the influence of machining data and tool geometry on the cutting process such as temperature and stress distribution during machining by using ABAQUS software. The results from this simulation can provide some useful information for choosing reasonable cutting edge and machining data to improve surface integrity and prolong cutting tool life in micro-milling operation.
Economic Life Evaluation of Wagon Side Frame Based on Durability Analysis
Authors: Song Wen Jie , Wang Ping , Wang Shuai
Published: February 2014

Based on the probabilistic fracture mechanics approach, durability test on the fine details of wagon side frame is simulated, the structural damage degree is evaluated from the four aspects of the survival probability, the stress amplitude, the crack formation time and economic repair limit size according to general EIFS distribution, and its economic life is predicted by combining with the stress spectrum measured in practice. The result shows that the EIFS follows the Weibull distribution and passes the K-S test, the structural damage degree can be quantitatively measured on the basis of the probabilistic model of crack exceedance, the economic life predicted tends to increase with the increase of crack exceedance probability, the rationality and validity of the analysis method is proved.
Tribological Prototype for Wear Tests on Pavement Surfaces
Authors: Cardenas E.E. Vera , Hernández F. González , Rentería M.A. Flores
Published: February 2014

In this work the design and manufacturing of a new test machine to simulate the Rolling Contact Fatigue (RCF) wear on pavement surfaces is carried out. The method of Quality Function Deployment (QFD) was used to determine the conceptual design of the machine; from this a detailed design of the machine was developed, through additional computer aided design software. The machine basically consists of a frame and two mechanisms; one is for transmitting the force and the other one the motion. The static conditions were calculated and a finite element analysis was performed by computer aided engineer software to determine the failure due to mechanical stresses. Finally it is showed the machine assembly and some preliminary tests in order to verify the performance of the tribological prototype.
Experimental Evaluation of the Acoustic Impedance of Different Ground Types by Sound Propagation in Open-Air Environments
Authors: Laranja Rafael A.C. , Budel Vander M. , Amorim Heraldo J. , Sobczyk S. Mario R.
Published: February 2014

This work presents an experimental characterization of three types of ground commonly found in urban centers regarding their absorption properties with respect to sound propagation: asphalt, grassland and soil. A brief theoretical background is presented, and the experimental procedure is discussed in detail. With basis on experimental results, it is concluded that grassland ground is mostly absorbent for all tested frequencies, whereas asphalt and soil are reflexive for low frequencies and absorbent for high ones.
Active Suspension Control of High-Performance Elevators
Authors: Rivas López Santiago M. , Sobczyk S. Mario R. , Wildner Fabiano D. , Perondi Eduardo A.
Published: February 2014

This paper addresses a comparative study concerning five control techniques applied to high-performance elevators active suspension systems, such as those employed in "skyscrapers". The main objective is to present the different control techniques and analyze the fundamental characteristics of each controller. To accomplish this, the development of the mathematical model of the controlled system is outlined and its integration with the control algorithms is presented. Besides three classic controllers (State Feedback, PID and Sky Hook), due to the significant dynamic behavior dependence on the mass of the passengers in the total mass transported, two adaptive control algorithms are used to compensate the effects of the mass oscillations of the system as the number of passengers varies along the operation cycle. Simulation results are employed to illustrate the behavior of the system when controlled by means of the presented algorithms.
Superplasticity and Superplastic Tensile Behaviour of AA5083
Authors: Yogesha B. , Divya H.V. , Bhattacharya S.S.
Published: February 2014

In the present investigation experimental and analytical characterization of the high temperature (superplastic) deformation of AA5083 alloy was carried out. Uniaxial tensile test was performed in a temperature range of 748 823K at different initial strain rates. Superplasticity is the ability of polycrystalline materials to exhibit, in a relatively uniform/isotropic manner, very large tensile elongations prior to failure, under appropriate conditions of temperature and strain rates. The phenomenon of superplasticity arising due to specific microstructural conditions is commonly referred to as "structural" superplasticity or "micrograin" superplasticity.
Path Generation for Robot Polishing System Based on Cutter Location Data
Authors: Lin Feng Yun
Published: February 2014

Polishing work is in most cases made by manual labour. It is an extremely laborious operation which demands a lot of time, so it is very expensive. This study aims at rationalizing such difficult polishing work by introducing a robot and CAD technology. Instead of the conventional complicated teaching process. A trajectory generator based on cutter location data generated from the postprocessor of a CAD system is discussed. To realize the smooth interpolation of the tool orientations, a quaternion interpolation algorithm between two CL data is proposed.
Implementation of aE-HUB Integration Technique for Design of Comprehensive Evaluation Index System
Authors: Wang Li Wei , Wang Xiao Qiong
Published: February 2014

In this paper, westudies the theoretics and methods about the E-HUB platform.we design the comprehensive evaluation index system of E-commerce project development risks, which is general and feasible. The E-HUB facilitates engineering collaboration and extends capabilities and capacities of its business partners with joint engineering, knowledge and manufacturing resources. Based on E-HUB, the SMEs can solve their complex engineering tasks and participate in projects far exceeding their individual capabilities.
Optimal Motion Planning for Robotic Manipulators
Authors: Lin Feng Yun
Published: February 2014

This paper presents a time-optimal path planning scheme for a robot manipulator to track a specified geometric Cartesian trajectory. It considers actuator constraints, the full robot dynamics. In order to make full use of the motors capacity, the bound torques are determined by considering the bound of the generated heat. The velocity limit and the bound acceleration (deceleration) are determined by combining with dynamics. We utilize the phase plane analysis technique to generate the minimum time trajectory.
Modeling and Simulating a Robotic System for Upper-Limb Rehabilitation
Authors: Cid A. Miranda , Hernández Acosta H.Y. , Velázquez Sánchez A.T. , Urriolagoitia Calderón G.M. , Castro Vicente A.A. , Méndez Ramírez E.H.
Published: February 2014

In this paper, we present a virtual prototype for a Upper-Limb Rehabilitation Robotic System is review, where the conflict of stability for a non-linear system its implemented, using as a model a double inverted pendulum and its response in Matlab - SimMechanics. It demonstrates the ability and ease of using new computerized tools where simulation and modeling of a system becomes an important utility to understand control concepts and carry them out in a controlled environment, it also can be of great help ensuring the complete characterization of a system, in which it can also result in experimental results. A soft trajectory follower PID controller is implemented to provide individual rehabilitation movements in a 2 DoF robotic system.
Review Article: Mechanism of Resonant Enhancement of Gold- and Copper-Nanowires Arrays
Authors: Locharoenrat Kitsakorn
Published: February 2014

Although second harmonic generations from gold- and copper-nanowires have been the subject of extensive studies, a complete understanding of the mechanism of the enhancement is still missing. The aim of review article is to address these issues by performing systemic studies of mechanism of the resonant enhancements between gold- and copper-nanowires in terms of surface reconstruction and relativistic effect, and implements these types of candidate for the potential applications in optical communications and optical devices.
Study on Dynamic Storage of SVG
Authors: Li Rui Fang , Yu Xiao Hong
Published: February 2014

SVG has good interaction, and its content can be dynamically added or deleted, but the change disappears immediately after the graphic is closed, and cant be saved, which brings more inconvenience to users. In this paper, the dynamic storage of SVG is studied, and the implementation principle is analyzed, then two dynamic SVG storage methods are introduced, which are based on traditional Ajax and based on Ajaxpro respectively. Practice proved that the method base on Ajaxpro, which broke the length limit of transfer parameters and the special character limit in traditional Ajax, has a better prospect.
A Fault-Tolerant Offset Algorithm for Measured Data with Defects
Authors: Li Xiang Jia , Dai Ning , Liao Wen He , Sun Yu Chun , Wang Yong Bo
Published: February 2014

Offsetting of measured data, as a basic geometric operation, has already been widely used in many areas, like reverse engineering, rapid prototyping and NC machining. However, measured data always carry typical defects like caves and singular points. A fault-tolerant offset method is proposed to create the high quality offset surface of measured data with such defects. Firstly, we generated an expansion sphere model of measured data with the radius equivalent to the offset length. Secondly, using the computational geometry application of convex hull, we acquire the data of outermost enveloping surface of this expansion sphere model. Finally, we use local MLS projection fitting method to wipe out existing defects, and generate the high-quality triangular mesh surface of the offset model. The offset surface generated by this method is suitable for practical engineering application due to its high efficiency and accuracy.
A Data Aided Estimation Algorithm of Decimal Frequency Offset for OFDM System
Authors: Tang Yun , Zheng Feng , Liu Hang , Miao Tian Qi
Published: February 2014

In recent years, orthogonal frequency division multiplexing (OFDM) technology has drawn widespread attention for its high spectral efficiency, and has doing better on combating multipath interference than traditional technology.The reason why OFDM system has high spectral efficiency is that it takes advantage of the orthogonality between sub-carriers,characteristic of which can eliminate interference of each subcarrier even when the spectrum of them overlapped.It is the demanding of orthogonality between subcarriers to demodulate signals that makes OFDM system extremely sensitive to frequency offset. Even a little frequency offset can bring inter-carrier interference.This paper studied the mechanism of formation of interference among sub-carriers, and proposed a frequency offset estimation algorithm by changing the structure of data symbols so that the data symbols can act as training sequence.The simulation results show that the proposed algorithm performs better than S.C algorithm in many aspects, such as MSE, BER, Constellation and so on.
Nonlinear Modeling and Virtual Scene Simulation of the Z-Propeller Tug
Authors: Gong Man , Nie Lei Xin
Published: February 2014

Ship maneuvering model and ocean scene are the core parts of navigation simulator, on the basis of MMGs model, the dual-engine and dual-propelling equipment of the Z-propeller tug were researched, the tugs mechanical model and propulsion model were established, speed, course and path of the tug were calculated with the Runge-Kutta method; virtual ocean was built at the meantime based on waves statistic spectrum and fast fourier transform; at last, data communication between different softwares was realized by means of UDP and ADO protocol, and virtual marine navigation system was established based on the Z-propeller tugs maneuvering model.
Optimization Waiting Time at Berthing Area of Port Container Terminal with Hybrid Genetic Algorithm (GA) and Artificial Neural Network (ANN)
Authors: Shahpanah A. , Poursafary S. , Shariatmadari S. , Gholamkhasi A. , Zahraee S.M.
Published: February 2014

A queuing network model related to arrival, departure and berthing process of ships at port container terminal is presented in this paper. The important datas collected from PTP port container terminal located at Malaysia. Based on the case study the model was built with using Arena 13.5 simulation software. Especially this study proposes a hybrid approach consisting of Genetic algorithm (GA), Artificial Neural Network (ANN) to find the the optimum number of equipments at berthing area of port container terminal. The input data that used in ANN obtained from Arena results. The main goal of this study is reduced waiting time of each ship at port container terminal, and Based on the result the optimum waiting time 50 will be achieved.
Microstructure Features of Ti-6Al-4V Alloy Deposited by Laser Direct Deposition
Authors: Gao S.Y. , Wu Y.Y. , Xi M.Z. , Luo Z.
Published: February 2014

Laser direct deposition of fully density metallic components is an advanced technology directly manufacturing metallic components to use a combining technology of rapid prototyping and high power laser cladding. Now researches have indicated that the laser direct deposition of titanium components is most definitely applied domain for this technology, and particularly obvious economic effects can be achieved in the field of manufacturing titanium aerial components. The present paper directs toward the laser direct deposition of Ti-6Al-4V alloy analyzed pattern features of molten pool and microstructure features of single-track build, multi-tracks overlap build, packing build. Through analysis, the bonding condition between cladding track and substrate has been disclosed, and the microstructure features in as-deposited zone and heat-affected zone have been indicated, as well as the influence of the overlap rate, track number of the multi-track overlap, and manner of the packing build on as-deposited microstructures has been explained.
Morphology and Mechanical Properties of Compatibilized β Nucleated Polypropylene/Polystyrene Blends
Authors: Lin Hu Bin , Du Chong Min , Zhu Jian Yi , Liang Wen Yao
Published: February 2014

The β nucleated polypropylene (PP), uncompatibilized β nucleated PP/polystyrene (PS) and compatibilized β nucleated PP/PS blends were prepared on a twinscrew extruder.and then,added into compatibilizers styrene-ethylene-propylene block copolymer (SEP) or twostyrene-ethylene-butylene-styrene block copolymers (SEBS) with different content of styrene.The morphology and mechanical properties of these composites were investigated.
Prolonged Anti-Inflammatory Activity of Topical Melatonin by Niosomal Encapsulation
Authors: Priprem Aroonsri , Netweera Vassana , Mahakunakorn Pramote , Johns Nutjaree Pratheepawanit , Johns Jeffrey Roy
Published: February 2014

Melatonin, encapsulated and non-encapsulated, in a topical gel, was comparatively investigated for its in vitro permeation and in vivo anti-inflammatory properties. An average size of the melatonin-encapsulated niosomes of 197 nm with a zeta potential of-78.8 mV and an entrapment efficiency of 92.7% was incorporated into a gel base. In vitro skin permeation of the same gel base incorporated with non-encapsulated melatonin or melatonin niosomes at 5% was comparatively evaluated through porcine skin using Franz diffusion cells and analyzed by spectroflurometry at λex 278 and λem 348 nm. From the same gel base, the permeation rate of non-encapsulated melatonin was about 2.5 times greater than that of melatonin-encapsulated niosomes. In comparison to piroxicam gel and hydrocortisone cream used as the positive controls, topical applications of melatonin and melatonin niosome gels tested in croton oil-induced ear edema in mice suggested that its anti-inflammatory activities were prolonged by the niosomal encapsulation. Similarly, analgesic effect of melatonin was prolonged by niosomal encapsulation using tail flick test in mice. Therefore, its immediate permeation through the skin was retarded by niosomal encapsulation which could also prolong its rapid decline in exerting anti-inflammatory and analgesic activities in vivo.
The New Fluidized Bed Thermo-Chemical Treatment in Chemically Active Powders – CFD Analysis of the Method
Authors: Babul Tomasz , Ciski Aleksander , Oleszczak Paweł
Published: February 2014

The paper describes the principles of carrying out of a new type of fluidized bed thermo-chemical treatment in chemically active powders with fluidization by chemically inert gas. The article presents selected results of a computer simulation of chemically active fluidized bed phenomena used in the thermo-chemical treatment of steel. For this purpose, a numerical model of the fluidized bed with a specific calculation area, has been prepared. The results of CFD (Computational Fluid Dynamics) computer simulation of temperature distribution and fluidizing gas mass distribution along the walls of samples placed in the fluidized bed are presented. Results of exemplary carburizing process are given. Metallographic observations and hardness measurements confirm the correctness of the of the carburized layer structure, which was formed on the C22 unalloyed carbon steel.
Study of the Relationship between Cutting Speed, Tool Wear and Machining Forces in Turning with Carbide Tool
Authors: Amorim Heraldo J. , Neto Augusto O. Kunrath
Published: February 2014

The understanding of machining processes comprises the study of phenomena such as: chip formation, cutting forces, tool wear mechanisms and the influence of the cutting parameters and machined materials on them. The aim of this work is to analyze the tool wear effects on machining forces during machining of AISI 1040 and 1045 carbon steels with carbide tool. Long-term machinability tests were performed, in which cutting force, feed force and tool wear were measured. Tool life results were analyzed, with best tool lives found for the AISI 1040 steel for all tested speeds. The other variables were analyzed as function of both time and tool wear. On the time domain, strong dependencies were found for both materials for tool wear, cutting force and feed force. The relationship between cutting force and tool wear showed good correlation for both materials, and the same was observed for feed force and tool wear relationship. Weak influence of cutting speed was observed on the relationship between tool wear and machining forces, which suggest that a single equation can describe them for all studied conditions with reasonable accuracy. The regression results are able to predict cutting forces as a function of tool wear with an average error of about 2.6 % during machining of AISI 1040 and 5.2 % for AISI 1045 steel. For the prediction of feed force as a function of tool wear, the average error is about 5.6 % for AISI 1040 and 7.0 % for the AISI 1045 steel, since a restricted domain is established. Data analysis showed a discontinuity in the behavior of feed force as a function of tool wear near the end of the life of the tools for most tests performed with AISI 1045 and some tests with AISI 1040 that suggest backwall wear, which was further evidenced by sudden change of chip form near the end of tool life in AISI 1040 steel.