bluuebunny/crossref_metadata_2025 huggingface dataset:
Review of Iridium Oxide Surface Modification on Bio-Electrodes
Authors: Qin Ge , Deng Ya Fei , Zhou Hong Mei , Li Juan Juan
Published: October 2014

Surface modification has become a common method to improve the interface property of electrodes. The existing problems on the interface of implanted electrodes are introduced in biocompatibility, corrosion resistance, electrochemical properties in this article. Iridium oxide is the most widely used material for implanted bio-electrodes because of its good biocompatibility, corrosion resistance, high safety injection charge density and low impedance. And preparation methods of the iridium oxide modifying bio-electrodes are described and discussed for enhancing the long-term implanting stability of the bio-electrodes.
The Research of Extruded Pressure Auto-Adjustment Method in Abrasive Flow Polishing
Authors: Wu Ming Yu , Gao Hang
Published: October 2014

Aiming at the quality problems of ‘over polishing’ and ‘insufficient polishing’ in the process of traditional extrusion abrasive flow machining,An abrasive flow polishing method at the constantly small pressure difference is developed, the hydraulic proportional control system is designed, and the mathematical modeling of the hydraulic proportional control system for small pressure difference constant extrusion polishing abrasive flow machining is set up. The simulation results show that the polishing pressure can be well controlled and the stability of polishing velocity is improved, which will improve the extrusion abrasive flow polishing quality.
A Chemism Analysis of Alkali in the Chemical Mechnical Polishing Process of SiC Substrate
Authors: Yao Jian Guo , Ma Li Jie , Fu Su Fang , Wang Zhan Kui , Su Jian Xiu
Published: October 2014

In this study, according to physic-chemical characteristic of the SiC crystals, we analyzed and researched the role of pH modifier in SiC crystal substrate chemical mechanical polishing and the surface after polishing. We used different polish agents which was made up with inorganic and organic bases to experiment, and then analyzed the results. The parameters of the polishing specimen, such as the removal rate of material, surface scanning and the roughness, were analyzed and used to determine the different pH modifiers played different roles in the stability of polish agents and surface quality of the specimen.
Study on the Removal Mechanism of Magnetorheological Finishing (MRF) by Using of Nano-Diamond Abrasives
Authors: Xu Zhi Qiang , Yin Shao Hui , Gong Sheng , Wang Yong Qiang
Published: October 2014

Magnetorheological finishing (MRF) is an advanced machining technology can achieve high efficiency and smoother surfaces. This study discusses the material removal mechanism of MRF, and proposes a kind of magnetorheological fluid with the nano-diamond abrasives. A series of experiments on the BK7 optical glass were conducted to investigate effects of the concentration of nano-diamond abrasives on surface quality and removal efficiency.
Design Method of Gear Form Grinding Machine Based on QFD and AHP
Authors: Wang Hui Liang , Deng Xiao Zhong , Xiong Yu Quan , Yang Jian Jun
Published: October 2014

Form grinding is the most popular finishing process for large-size gear, so the design method of the machine based on QFD and AHP was proposed. First, researched the situation of home and abroad, then analyzed the quality of customer needs and the development of technical measures in order to establish a house of quality. To avoid the blindness of the development and design, really provides a systematic basis for decision making gear form grinding machine in a leading position in the domestic market in the future. Finally, an example is used to demonstrate the feasibility of this approach.
The Use of DBB Measurement in Horizontal Machine Tool
Authors: Li Yang , Zhao Ji , Ji Shi Jun
Published: October 2014

The double ballbar(DBB) is an instrument to measure roundness error of the machine tools. Traditionally, DBB is used in the vertical machine tool which has a vertical spindle, so the DBB can be easily installed to measure without additional jigs. But the condition in the horizontal machine tool is different. Because the horizontal machine tool has no vertical spindle, additional jigs are needed for the measurement. Not only the differences in the using DBB but also in the forming circular trajectory exist. Center of the circular trajectory in the vertical machine tool is stationary, but not in the horizontal machine tool. The trajectories of two balls of the DBB are not same in the two kinds of the machine tools. The method that the DBB measurement in the horizontal machine tool has the same effect comparing with the measurement in the vertical machine tool is presented.
Analysis and Design of the Roller for Belt Conveyor Based on ANSYS
Authors: Yuan Xing Qi , Yang Shuang Yan , Niu Quan Yun
Published: October 2014

With the fast development in continuous conveyor technology, the belt conveyor to be more widely applied, the belt conveyor technology is gradually refined, and has made a number of achievements. Drum as a belt conveyor drive components, attracted the attention of the relevant technical staff. To ensure the belt conveyor system, the optimizing design of the drum quality and the strengthen use of the drum performance have an important guiding significance to the safety and reliability as a whole. With the help of ANSYS software, finite element analysis, the optimal design results analysis showed that the effect of optimal design to achieve the purpose of has a certain guiding significance for optimizing the structure of actual production. Key words: Belt conveyor; drum; transmission parts; ANSYS; the optimization design
Tool Wear Properties of Diamond-Cutting Ferrous Metal
Authors: Huang Shuai , Liu Xin , Chen Fa Ze , Xu Wen Ji
Published: October 2014

The applicability of diamond cutting is greatly restricted due to the serious chemical wear for the machining of ferrous materials. The processes of diamond natural graphitization and graphitization in diamond/Fe interface were analysed by molecular dynamics (MD). Simulation proved that the graphitization temperature decreased from 5215 K of natural graphitization process to 1300 K at diamond/Fe interface, and diamond which near the Fe atoms was graphitized firstly. Diamond tool wear behavior during ordinary cutting and ultrasonic elliptical vibration cutting (UEVC) of NAK80, S136 was analysed. Results showed that the diamond tool wear decreased greatly in UEVC. MD Simulation and cutting experiments both demonstrated that lowering the temperature of the interface could effectively reduce the wear of diamond tool.
The Pressure Field Radiated by Cavitation Bubble in the Grinding Area of Power Ultrasonic Honing
Authors: Zhu Xi Jing , Guo Ce , Wang Jian Qing
Published: October 2014

The pressure field induced by cavitaion bubble is responsible for the grinding mechanism and the cutting chatter of power ultrasonic honing. Based on the cavitation bubble dynamics model in the grinding area of power ultrasonic honing, the radiation pressure field of cavitation bubble was established. Experimental results show that the bubble is distributed in the grinding area like honeycomb and the size is about 10μm. Numerical simulation of dynamics and pressure field of cavitation bubble was performed. Numerical results show the dynamic behavior of cavitation bubble presents grow, expend and collapse under an acoustic cycle. However the expansion amplitude of bubble can be decreased and the collapse time can be extended and even collapse after several acoustic cycles with increasing ambient bubble radius. The bubble radiation pressure during collapsing bubble increases with increasing ultrasonic amplitude and ultrasonic frequency. And the pressure value of collapsing bubble is about 10Mpa which is more an order of magnitude than atmospheric pressure.
Study on Polishing Technology for Hard-Brittle Materials by a Micro Abrasive Water Jet
Authors: Liu Zeng Wen , Liu R.Y.
Published: October 2014

s: Abrasive jet micromachining is considered as a promising precision processing technology for brittle materials such as silicate glass and silicon nitride that are increasingly used in various applications. In this study, some polishing experiments are conducted for hard-brittle materials by a micro slurry jet. The results show that the morphology and the integrity of the material surface are improved greatly after polishing. The average roughness (Ra) value of the silicate glass decrease from 2.32μm to 0.35μm and the average roughness (Ra) value of the Si3N4 decrease from 2.63μm to 0.34μm. The material removal mechanism and the surface formation mechanism are studied. The factors to influence the surface morphology, the surface quality and the surface roughness are analyzed in order to take measures to improve the surface quality and reduce the surface roughness value.
The Finite Element Analysis for Ultra-Precision Single-Plane Lapping Machine Bed
Authors: Li Sheng Lan , Wang Cheng Yong , Li Qing Jian , Song Yue Xian , Xiong Xu
Published: October 2014

There are four kinds of ultra-precision lapping machine bed were developed: with/without reinforcing rib, with/without a pair of closed sides. The finite element analysis was used to find the optimal design of the machine bed. The 3D model of the ultra-precision lapping machine bed was built by SolidWorks, and ANSYS software was used for static analysis and modal analysis. The results suggest that when reinforcing rib and a pair of closed sides were owned, the machine bed had some better static and dynamic characteristics. The mix-deformation of this machine bed was 1.911μm, and the first-order inherent frequency was 101.74Hz.
Performance of Brazed Diamond Tool for Machining Dental Ceramic
Authors: Zhang Feng Lin , Zhou Yu Mei , Guo Chang Wen , Mao Jun Bo , Huang Hui Ping
Published: October 2014

Diamond tools are fabricated by brazing and used to machine dental ceramics in this paper. The morphology, grinding ratio, wear and grinding force of the brazed tools are investigated in comparison with that of the electroplated ones. The results show that the brazed alloy forms a hill-like structure around the diamond grits, and the protrusion of the brazed diamond grits is higher than that of the electroplated one. The grinding ratio of the brazed diamond tool is higher than the electroplated one. Many fall-off diamond pits of the electroplated tool and only few micro-crack diamond grits of the brazed tool are observed after grinding, and the brazed one remains well process capability. The grinding force of the electroplated tool is larger than that of the brazed one.
Water Dispersion Conductive Polypyrrole Based on Nanocrystalline Cellulose
Authors: Al-Dulaimi Ahmed A. , Wan Rosli W.D.
Published: October 2014

Conductive polypyrrole (PPY) was successfully synthesized via situ polymerization of pyrrole monomer in presence of nanocrystalline cellulose (NCC) suspension as a dopant and template with a rarity sedimentation. PPY-NCC composite having very good dispersion stability in aqueous media. The chemical structure of PPY and PPY-NCC was investigated by using Fourier transform infrared spectroscopy. FTIR result shows that the synthesis of PPY in presence of NCC still retains its chemical structures well. Scanning electron microscopy (SEM) analyses shows obvious transformation in PPY morphology from cauliflower-like spherical particles with 400-500 nm to nanofibers with 200nm length after composite with NCC. Transmission electron microscopy (TEM) revealed the typical morphology of NCC rod-like nanostructure with length 150 ±23 nm and diameter 6.5 ±0.68 nm and the NCC nanorod is coated by a cover of PPY with irregular thickness.
Electrochemical Characteristics of an Optimized Ni-P-Zn Electroless Composite Coating
Authors: Kordijazi Amir
Published: October 2014

An optimized electroless solution was used to deposit the Ni-P-Zn composite coating. Potentiodynamic polarization test, salt spray technique and electrochemical impedance spectroscopy were utilized to study electrochemical characteristics of the as-deposited coating. All results demonstrate an excellent corrosion resistance of the as-deposited layer. Corrosion current density of the coating was compared to some similar coatings reported in other papers to study reasons of its high corrosion resistance. It was proved that the high corrosion protection of the coating is due to the optimization of P and Zn contents in the coating composition.
Simulating of Backward Extrusion Process of Nanostructured Al-6082 Material
Authors: Agena Ahmed S.M.J.
Published: October 2014

Backward extrusion (it is also called indirect extrusion) is an extrusion process in which the billet is placed in the container cavity, and where the movement of the punch is in the opposite direction to the movement of the flow of the metal. In this work the backward extrusion were applied on a nanostructured material. the extruded material were three types of nanostructured Al-6082 alloy Pass 1, pass 4(route C), pass8 (route C) which are produced by equal channel angular pressing (ECAP), in addition to the annealed Al-6082 material. The experimental results show that the pass 8 (route C) has the maximum value of extrusion loads and high value of hardness. From the finite element simulation it observed that the maximum value of equivalent strain was when the pass 4 material was used, while the equivalent strain of pass 1 and pass 8 seem to be equal and that the maximum flow stress was obtained when the pass 8 material was used. Well visible crack appeared at the top edge of all cups that made from pass 8 material
Cementite Precipitation of a H21 Tool Steel after Hot Compression and Double Temper
Authors: Nurbanasari Meilinda , Tsakiropoulos Panos , Palmiere Eric J.
Published: October 2014

The cementite precipitation behavior in the martensite and banite of the H21 tool steel under high temperature axisymmetric compression test and double temper was investigated. The main purpose on this work is to develop a better understanding regarding the transformation mechanism of bainite and martensite in a H21 tool steel. The selected deformation temperatures were 1100 oC and 1000 oC and the double temper process was carried out at 650 oC for 1 hour respectively. The results showed that the cementite was sensitive to the stress. The applied stress has affected the Fe3C precipitation behaviour by decreasing the number of variants carbides in tempered martensite and decreasing the number of a single variant carbides in tempered lower bainite. The results were in agreement with a displacive mechanism of martensite and bainite transformation. It was also found that hot deformation temperatures selected in this work have the same contribution in decreasing number of variant carbides in tempered martensite and decreasing number of single variant carbides occurred in tempered lower bainite.
Methane Adsorption on Chemically Modified Microwave Irradiated Palm Shell Porous Carbon
Authors: Nasri Noor Shawal , Hamza Usman Dadum , Saidina Amin Nor Aishah , Ahmed Murtala Musa , Mohammed Jibril , Mohd Zain Husna
Published: October 2014

Low-cost palm shell was used as a precursor for preparation of porous carbons via chemical impregnation with K2CO3 and microwave heating. Volumetric adsorption setup was used to measure the adsorption capacity of methane at 303.15 K under pressure up to 4 bars. The methane adsorption data was modelled by Langmuir, Freundlich, and Dubinin–Radushkevich (DR) isotherm equations. Langmuir and Freundlich models were found to have the best fit than DR isotherm. The kinetics of methane adsorption on the microwave porous carbon followed pseudosecond-order model equation. The highest methane adsorption capacity obtained was 3.533 mmol/g at 4 bar and 303.15 K. It was noticed that there is increase in adsorption with increased in initial pressure. The porous carbon displayed good adsorption characteristics for methane.
Biopulping by Ceriporiopsis subvermispora towards Pineapple Leaf Fiber (PALF) Paper Properties
Authors: Mat Nayan Nadirul Hasraf , Abd Razak Saiful Izwan , Wan Abdul Rahman Wan Aizan
Published: October 2014

Environmental awareness and depletion of the wood resources are among vital factors that motivate various researchers to explore the potential of agro-based crops as an alternative source of fiber material in paper industries such as writing, printing, wrapping, and packaging. Fibers from agro-based crops are available in abundance, low cost, and most importantly its biodegradability features, which sometimes referred as “ecofriendly” materials. This paper reports the biopulping of pineapple leaf fiber (PALF) by Ceriporiopsis subvermispora towards the properties of its fiber and paper forms. The individual fibers were characterized having good tensile properties at 0.3% of fungus treatment and favourable structural properties as characterized by Fourier transform infra-red (FTIR) spectroscopy. It was also shown that the PALF paper achieved desirable tear index value and uniform morphological observations compared to the conventional chemical pulping method. This new approach of pulping PALF finds applications in paper and packaging products which requires biofriendly characteristic and cost effective.
Synthesis of Zeolite A from Coal Fly Ash by Alkali Fusion and Hydrothermal
Authors: Jumaeri  , Santosa Sri Juari , Sutarno  , Kunarti Eko Sri
Published: October 2014

Zeolite A has been synthesized by a modified alkali fusion followed hydrothermal process. Hydrothermal was performed at a temperature of 90 °C for 4 h in a stainless steel reactor. Characterization of the synthesized zeolite was conducted using various techniques, i.e. X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) and measurement of cation exchange capacity (CEC). The characterization results showed that zeolite A was selectively obtained by this method. The diffract gram, SEM image, and IR spectra of the synthesized zeolite A showed a similarity with the commercially available zeolit A.
Equilibrium and Kinetic Studies of Benzene and Toluene Adsorption onto Microwave Irradiated-Coconut Shell Activated Carbon
Authors: Nasri Noor Shawal , Mohammed Jibril , Ahmad Zaini Muhammad Abbas , Hamza Usman Dadum , Mohd. Zain Husna , Ani Farid Nasir
Published: October 2014

Concern about environmental protection has increased over the years and the presence of volatile organic compounds (VOCs) in water poses a threat to the environment. In this study, coconut shell activated carbon (PHAC) was produced by potassium hydroxide activation via microwave for benzene and toluene removal. Equilibrium data were fitted to Langmuir, Freundlich and Tempkin isotherms with all the models having R2 > 0.94. The equilibrium data were best fitted by Langmuir isotherm, with maximum adsorption capacity of 212 and 238mg/g for benzene and toluene, respectively. The equilibrium parameter (RL) falls between 0 and 1 confirming the favourability of the Langmuir model. Pseudo-second-order kinetic model best fitted the kinetic data. The PHAC produced can be used to remediate water polluted by VOCs.
Comparative Study on Seismic Response of Reinforced Concrete Frames with SMA in Column and Beam Plastic Hinge Zones
Authors: Omar Mohamed
Published: October 2014

This paper presents a comparative analytical study on seismic response of low rise three storeys concrete frame reinforced with super-elastic material as rebar elements. The super-elastic shape memory alloy rebars were used as reinforcement in two plastic hinge zones of the frame, beam plastic hinge zones and column plastic hinge zones. The response of the frame structure with two different reinforced cases is compared to response of the frame structure reinforced with regular steel material. Nonlinear dynamic time history analysis is performed in this study. Three different great earthquake ground motions were used to determine the seismic response of the frame structures in terms of frame top displacement time history and inter-storey drift along the frame height for different cases of reinforcements. Results obtained from the analysis show that the seismic response of low rise frame reinforced with super-elastic SMA rebars is affected by the zone of which SMA rebar are used in reinforcement. The SMA column reinforcement is more effective than SMA beam reinforcement in reducing the frame response.
The Correlation between Variations of Pressure against Temperature Distribution in Supersonic Subsea Compact Wet-Gas Separators
Authors: Ahmad M.F.A , Mohd Hashim F.M.
Published: October 2014

Conventional wet gas separators are used as a mean to remove free water using gravitational and momentum principle. However, these separators create setback in terms of its efficiency. As an alternative, supersonic compact wet gas separator have been designed in Universiti Teknologi PETRONAS Gas Separation Research Center (UTP GSRC) which uses supersonic flow to separate natural gas and free water for gas transmission pipelines. For the preliminary design, it is important to determine the flow behavior according to the design of the separators. The results can provide information on whether the design can be accepted or improvement should be taken into consideration. It is therefore an objective of this paper to numerically simulate and analyze the correlation between variations of pressure against temperature distribution in the separators design. From the initial pressure variation against temperature results, it can be concluded that the initial pressure ranges from 5 MPa to 6.7 MPa are the best to be used for achieving better separation efficiency.
Nanorod Formation of Copper Indium (di) Selenide Nanorod Synthesize by Solvothermal Route
Authors: Jakhmola Priyanka R. , Agarwal Garima , Jha Prafulla K. , Bhatnagar Satya Prakash
Published: October 2014

The compound belongs to I-III-VI2 group are promising material as an effective light-absorbing materials. Now a day, ternary chalcopyrite semiconductors, especially copper based I-III-VI2 semiconductors have attracted many investigators. They have several desirable features as absorbers in the thin film solar cells. In present work, copper indium (di) selenide have been prepared via solvothermal route. Several methods have been reported to prepare CuInSe2 nanostructures by solution route. In present work, tetragonal chalcopyrite copper indium (di) selenide nanorods has been synthesized by solvothermal method using ethylene diamine as a solvent. Structural analysis had been done by X-ray diffraction (XRD). The surface morphology of the as-grown nanorod has been studied using scanning electron microscopy. The bandgap of as grown nanorods is obtained from UV-Vis spectrum which will applicable to the solar cell devices.
Ab Initio Study of Pressure Induced Structural, Magnetic and Electronic Properties in Plutonium Pnictides
Authors: Makode Chandrabhan , Pataiya Jagdeesh , Aynyas M. , Sanyal Sankar P.
Published: October 2014

We have investigated the pressure induced structural and electronic properties of plutonium pnictides (PuY, Y= P, As, Sb). The total energy as a function of volume is obtained by means of self-consistent tight binding linear muffin-in-orbital (TB-LMTO) method within the local spin density approximation (LSDA). From present study with the help of total energy calculations (spin polarized) it is found that PuP, PuAs and PuSb are stable in NaCl – type structure under ambient pressure. The structural stability of PuP, PuAs and PuSb changes under the application of pressure. We predict a structural phase transition from NaCl-type (B1-phase) to CsCl-type (B2-phase) structure for these Pu-pnictides in the pressure range of 20.8 – 42.0 GPa. We also calculate the lattice parameter, bulk modulus, band structure and density of states. From energy band diagram it is observed that all the three compounds exhibit metallic behaviour. The calculated equilibrium lattice parameters and bulk modulus are in good agreement with available experimental data.
Influence of Mn Site Substitution on Electrical Resistivity and Magnetoresistance Properties of Rare Earth Manganite
Authors: Tank Tejas M. , Bhargava D. , Sridharan V. , Samatham S.S. , Ganesan V. , Sanyal Sankar P.
Published: October 2014

We investigate the effects of Cr, Ru and Sn substitution on electrical resistivity and magnetoresistance property of polycrystalline samples La0.67Sr0.33Mn1-xBxO3(x = 0, 0.05; B= Ru, Cr and Sn) compounds. The value of M-I transition temperature (TP) decreases while resistivity increases with Cr, Ru and Sn substitution, moreover, the largest low-temperature magnetoresistance (MR %) is found at magnetic field dependent (Isotherm), which suggest that the spin-dependent scattering from internal grain regions is also responsible for the low-temperature MR %. Resistivity data have been fitted with the variable range hopping model to estimate the density of state at Fermi level. It was observed that the substitution of various transition metals in the Mn-site leads to a decrease in conductivity of the doped manganite samples, with conduction being controlled by the disorder induced localization of charge carriers.
Pressure Induced Structural and Electronic Properties of Thulium Nitride
Authors: Panwar Yeshvir Singh , Aynyas Mahendra , Tejraj M.K. , Sanyal S.P.
Published: October 2014

We report ab initio calculations of pressure induced structural phase transition and electronic properties of thulium nitride (TmN). The total energy as a function of volume is obtained by using the self-consistent tight binding linear muffin-tin-orbital (TB-LMTO) method within the local density approximation (LDA). It is found that TmN is stable in NaCl – type structure under ambient pressure. We predict a structural phase transition from NaCl-type (B1-phase) structure to CsCl-type (B2-phase) structure of this compound at a high pressure of 68 GPa. We also calculate the lattice parameter (a0), bulk modulus (B0), band structure and density of states. From energy band diagram it is observed that TmN exhibit metallic behaviour. The calculated values of equilibrium lattice parameter and bulk modulus are in general good agreement with available experimental data.
Structural Stability and Chemical Bonding of TiN: Ab Initio Study
Authors: Chauhan Mamta , Gupta Dinesh Chandra , Bhat Idris Hamid
Published: October 2014

We have performed ab-initio calculations to investigate the structural and electronic behavior of TiN in the stable B1 and high pressure B2 phases using pseudo-potential plane wave approach within the framework of density functional theory. The calculated results show agreement with the experimental data. The present electronic behavior, determined by total energy calculations with generalized gradient approximation for exchange and correlation interactions, is observed to be similar in both B1 and B2 phases showing metallic, covalent as well as ionic bonding of TiN. The investigations in B2 phase need validation experimentally as well as theoretically.
Study of Structural, Electronic and Elastic Properties of LuPd3 Compound
Authors: Thakur Veena , Pagare Gitanjali , Chouhan Sunil S. , Sanyal Sankar P.
Published: October 2014

The structural, electronic and elastic properties of nonmagnetic LuPd3compound, which crystallize in AuCu3-type structure, are studied using first principles density functional theory based on full potential linearized augmented plane wave (FP-LAPW) method. The calculations are carried out within the PBE-sol GGA for the exchange correlation potential. The ground states properties such as lattice parameter (ao), bulk modulus (B) and pressure derivative (B') have been obtained using optimization method. The elastic properties such as Young’s modulus (E), Poisson’s ratio (σ) and anisotropic ratio (A) and thermal are predicted for first time. The ductility of these compounds has been analyzed using Pugh criteria.
Investigation of Dielectric Behaviour of Chemically Treated Coir Fiber Reinforced Epoxy Composites
Authors: Khan Alveera , Joshi Shirish
Published: October 2014

The use of natural fibers in making a variety of synthetic material has attracted attentions due to mainly two causes. 1. Making use of waste material into usable composites and 2. To tide over disposal of waste which otherwise causes degradation of environment. In the present study raw coir fiber was chemically treated with nitro compounds. It is a kind of chemical modification of fiber. Treated fiber was reinforced with epoxy polymer in the 1:1:1(resin: hardener: treated fiber). Dielectric estimation of the resulting composite was done with Wayne Kerr impedance analyzer in the temperature range of 30Oto 180OC at different frequencies. Systematic variation in properties was found from pure epoxy composite to fiber reinforced epoxy composite. XRD study reveals that composite is crystalline in nature. Change in morphology of the fiber was found when compared with untreated fiber, which is confirmed by Scanning Electron Microscopy. The objective of this study is to utilize the coir fiber, a waste product found in abundance in nature. If natural fibres could be used as reinforcement material in polymers, it may lead to new dimensions to research in the area of embedded materials. It might prove as an asset in electronic, automobile and engineering fields. It is lightweight; bio-degradability makes it a potential in new arena when India goes green.Keywords: coir, fiber, reinforcement, polymer
Pressure Effect on Structural and Phonon Properties of Mixed Alloys Compounds
Authors: Ahirwar Ashok K. , Aynyas Mahindra , Sanyal S.P.
Published: October 2014

We report pressure induced structural phase transition, elastic and thermal properties of concentrations of UXLa1-XS (x= 0.80, 0.60 and 0.50) compound, using modified inter-ionic potential theory (MIPT), which parametrically includes the effect of coulomb screening. The calculated equation of state, phase transition pressure, bulk modulus and volume collapse are agree well with the available theoretical or experimental findings. We have also reported the second order elastic constants and Debye temperature of this compound for first time. We have also reported the Phonon properties of UxLa1-xS (x = 0.80, 0.60, 0.50) compounds by using breathing shell model (BSM). The present model includes breathing motion of electron shells of rare earth atom due to f-d hybridization. The calculated phonon dispersion curves of UxLa1-xS are presented follow the same trend as observed in uranium chalcogenides. We have reported doping effect of La on phonon frequencies at X and L-points for the first time. The LO-TO splitting increases as decreasing concentration of La.Keywords: Phase Transition, Elastic Properties, Debye Temperature, Phonon Dispersion
The Influence of Coal Adsorbing Methane and Carbon Dioxide on Gas Outburst
Authors: Cheng De Zhu , Du Ai Ling , Du Ai Qin
Published: October 2014

Methane and carbon dioxide of different pressures were absorbed by the anthracite coal for 5 hours in high pressure reactor. When adsorption experiment was completed, pressure is reduced quickly. The content of pulverized coal which was produced by releasing gas quickly, was used to reflect capacity of gas adsorption. The result showed that the content of pulverized coal which was produced by adsorbing CH4 was higher than that was produced by adsorbing CO2 on the same coal under the same pressure. Langmuir isotherm and Freundlich isothermal can describe coal methane adsorption. Freundlich isothermal can be a good description of coal carbon dioxide adsorption.
A New One of Heating and Humidifying Equipments for Tobacco
Authors: Zhang Yong Ren , Li Zhe Kun , Zou Yu Sheng , Xu Yong Kang , Luo Yong
Published: October 2014

SIROX is a new heating and humidifying technology to substitute HT. It changes the heating insufficient and humidifying poor uniformity of tunnel HT. It uses locking air means in feeding and the steam is supplied through the rotary joint to the turning bars with steam orifice. So that the material will uniformly warm and humidify better and overcome the shortcomings of HT’s. SIROX has simple structure, low maintenance costs, easy to clean. This paper analyzes the composition and working principle of several heating and humidifying devices and their respective advantages and disadvantages, provides a reference for the heating and humidifying technology.
Research of an Automatic Cruise Intelligent Vehicle Control Program
Authors: Han Yong Qi , Cao Li Ying , Bi Chun Guang
Published: October 2014

Control core of Intelligent automatic patrol car track (photovoltaic group) uses G128 chip, which function modules include: laser sensor, speed control module, the servo control module. The basic principle is that the control center sends a signal to the laser sensor module, which controls laser tube launching and receives data by laser receiver returning. According to the data of the receiver, the core module synchronously controls servo module and the speed module. The main program uses a PID algorithm by C language.
The Research and Development of the Coal Mine Underground Drainage Equipment Automatic Control System
Authors: Meng Zhang , Feng Tao Zhu , Feng Guo
Published: October 2014

The coal mine drainage equip ment plays an important role to make the production normally and orderly. At present, domestic coal mine drainage system implement manual monitoring, namely the traditional relay control method.Feature of this method is that a large labor intensity, low reliability and stability,and complicated control circuit,it has not adapted to the needs of the development of coal.In this paper, design of the automatic drainage system is to make up for the shortage of the traditional relay control,it adopts PLC control with a combination of PC monitor to improve the safety of the work,and has a long service life, convenient maintenance, etc.
Bracket Electro-Hydraulic Control System Based on PLC Hydraulic Research
Authors: Wei Guo , Ji Li
Published: October 2014

Adopt a PLC controller as the core and combined hydraulic supports CAN bus technology to build electro-hydraulic control system, the composition and working principle of hydraulic support electro-hydraulic control system will be described; according to the control system control requirements to achieve a single frame single action moving, single rack sequential linkage, group exercise, shearer position detection and the overall program design, while the stent control system software and hardware design. Verification shows that the system is able to achieve its basic functions. Reference to automate the development of the growing coal mine hydraulic support electro-hydraulic control system.
Kinematic Analysis of Shaping Machine Based on ADAMS
Authors: Sun Jian
Published: October 2014

Motion analysis was carried out on the working device of shaper. The simulation model of the Shaping machine is established based on the multi-mechanical system simulation software ADAMS. Through the simulation analysis, we can get the kinematics characteristics of each rod of shaper. In the method, simulation is authentic, visualized and convenient in measurement. The result shows that the method is efficient and useful in the kinematic and dynamic characteristics analysis of mechanism.
Application of Squeeze Film Ultrasonic Levitation
Authors: Cong Lin Hao , Li Dong Ming
Published: October 2014

In this article the principle of gas squeeze film levitation is described and the main application of it is introduced respectively according to the vibration mode.A new piezoelectric transducer applied for squeeze film bearing which is used for cylindrical shaft and can realize equably circumferential fixed support is proposed, the vibration characteristics of it is studied and the bearing’s loading capacity is tested.
The Application of Adaptive PSO in PID Parameter Optimization of Unmanned Powered Parafoil
Authors: Wang Ya Ping , Dong Hai Rui
Published: October 2014

Searching optimal PID parameters depends on the engineering experience and the experience is more time-consuming, less effective. In order to improve the efficiency of optimizing the PID parameters, propose a method of adaptive particle swarm optimization (APSO) to adjust inertia weight. During searching process, taking PID parameters as particles of particle swarm and the standard of ITAE is the performance index of error. If the algorithm is caught into the local optimal, then change the inertia weight. The simulation on the pitch channel of unmanned powered parafoil shows that the PID parameters of parafoil pitch channel controller which is adjusted by APSO have good effect. At the same time, the result can indicate that the PID parameters adjusted by APSO can improve tracking performance of the system, so that it has highly application value.
On the Localization of Combine Harvester
Authors: Zhao Hua Yang , Wu Xiao Qiang
Published: October 2014

Summary of the development status of combines in domestic and abroad, combined with China's actual conditions, analysis of the problems of combine harvesters, this paper presents the type of combined harvester which suitable for agricultural production in China, put forward rationalization proposals for combine domestic.
Intelligent Control System of Water Washing Robot for Substation
Authors: Wang Zhen Li , Mu Shi You , Ren Jie , Lu Shou Yin , Li Jian
Published: October 2014

This paper provides an intelligent control system of water washing robot for Substations, which is based on the Internet of Things Technology and uses WIFI network as the link, effectively solves the problem that building control system of hydraulic manipulator under the environment of high voltage and strong magnetic in substation. This system uses Multi-Sensor Fusion Technology to construct a insulation protection control system of water washing robot, it can ensures the safe operation of the robot and the substation equipments. By utilizing this system to replace the operators, it can wash the equipments in substation for live working so that it can effectively reduce the heavy labor by manual and ensure safety of operators. And also, it can prevent equipments from pollution flash-over accidents happening and guarantee the power grid safe operation.
Research on Transfer Clamp of Rear Fender Extension Plate Multi-Station Stamping
Authors: Zuo Z.J. , Li Z.Q. , Zhang Z.Y. , Du W.L. , Li J.X.
Published: October 2014

Multi-station stamping production with high production efficiency and low overall cost is an important technology for mass production of automotive components. This paper aims at the shape characteristics and overall process of the rear fender extension plate, determines the clamping position, works out the clamp plan during the parts transmission from OP20 to OP30, and builds the horizontal and vertical deflection mechanical models. After calculation and comparison, a suitable mode is selected for the production of clamping. The selection and check of clamping position provides a method and practical example for real production.
Indoor Positioning Using Combination of Wi-Fi Fingerprint and Inertial Positioning
Authors: Jiang Yu , Wu Meng , Yi Xiang , Wang Shan
Published: October 2014

Indoor positioning via mobile device is one of the unexploited research area. With the popularity of Wi-Fiaccess points inside buildings, Wi-Fi localization becomes one of the feasible method to assist the indoor positioning. However, due to the complication of indoor environment, indoor positioning merely depending on Wi-Filocalization is not robust against interference of electromagnetism and structure of the building. Thus, with the assistance of inertial positioning technique, we present a robust indoor positioning technique and it gains good performance on energy consumption and localization accuracy.
Design and Implementation of Intermediate Frequency Generation and Analysis Module for Avionics Test
Authors: Zhang Peng , Wang Hou Jun , Li Li , Wang Ping
Published: October 2014

To test airborne avionics device, it is necessary to provide signal stimulus for the device under test (DUT) to simulate the real work environment. This paper proposes a hardware module which used to signal generate and analyze. The hardware structure and diagram of logic design are described. The generated waveforms and measurement results are presented. This test module combined with other necessary modules can achieve the test of L band airborne avionics such as ATC, TCAS and TACAN.
Remote Fault Diagnosis for Ion Nitrogen Furnace System
Authors: Cai Li Min , Li Peng
Published: October 2014

In this paper, we propose a network-based remote diagnosis system for ion nitrogen furnace. This system consists of the site measurement, control and diagnosis end, GPRS communication module, and remote fault diagnosis end. This system can collect and transmit data for the remote fault diagnosis. Experiments demonstrate that the proposed system can satisfy the user-specified requirements.
Determination of Basic Probability Assignment Based on Recognition Sequence
Authors: Chen Yan Fei , Xia Xue Zhi , Tu Kui
Published: October 2014

In some practical application of target recognition with sensors, the sensors will give the recognition sequence of targets, which is more detailed than the single recognition result. How to properly construct the basic probability assignment by the recognition sequence becomes the key to successful application of evidence theory. For the recognition sequence of the target recognition results of general sensor is incomplete, and the importance of the types in the recognition sequence is in descending order, this paper proposes a method to construct weights of recognition sequence, the basic probability assignments constructed by the weights are closer to the real recognition results. Simulation results show that this method is more reasonable and effective than the method of contrast.
Research and Progress of Electromagnetic Coil Gun Ranging
Authors: Qi Chao , Wang Ye , Liu Wei Jian , Quan Yong
Published: October 2014

The armature trigger position of multi-stage electromagnetic coil gun has great influence on the exit velocity of projectile. The energy conversion efficiency of the coil gun can be improved effectively if the armature is triggered in the optimum position. So it is important to detect the projectile position in time. Several typical electrical and optical methods for position detection are summarized in this paper. The advantages and disadvantages of each method are analyzed and evaluated. And a new laser scattering measurement method is proposed. Results show that optical detection method is simple and easy to implement, but it is susceptible to environmental impacts.
Studies on Poplar Veneer Dyeing with Reactive Yellow Dyes
Authors: Yu Sheng Fei , Liu Yuan , Li Xian Jun , Luo Wu Sheng
Published: October 2014

In this paper, the relationship is studied by spectrophotometric method between the structure of reactive yellow X-R, reactive yellow K-6G, reactive yellow KN-GR, reactive yellow M-5G, reactive yellow M-3RE, reactive yellow EF-3R and their colors, poplar veneer dyeing characteristic parameters S, E, R, F values, exhaustion curves and fixation curves. The results showed that longer conjugated system and better coordination of electron donor and acceptor group and smaller steric hindrance generates longer absorbance wavelength. The S value of six active dyes is reactive yellow X-R> reactive yellow KN-GR> reactive yellow K-6G> reactive yellow M-5G> reactive yellow M-3RE> reactive yellow EF-3R, the R and E and F value is reactive yellow M-3RE> reactive yellow M-5G> reactive yellow EF-3R> reactive yellow X-R> reactive yellow KN-GR> reactive yellow K-6G. The exhaustion and fixation rate is increasing with the increasing of time, except that the exhaustion containing single chlorine-triazine is decreasing within 10min after addition of alkali.
The Key Technology Research for Logistics Vehicle Monitoring System Based on GPS
Authors: Huang Li Jun
Published: October 2014

As the logistics industry scale expands unceasingly, logistics vehicles, increasing the traditional freight vehicle management method because of the lack of the support of new technology and gradually cannot meet the needs of enterprise development. The research target of this paper is through the transportation network, information, the digital management of vehicles, the vehicle and cargo optimized configuring, and improve the utilization rate of vehicle load and capacity utilization, so as to speed up the efficiency of business operation of the entire transportation industry, enterprise operation standardization and control automation, reduce business operating costs, the use of system and the research will speed up the development of logistics industry.
The Design of the Istallation Device for Soil Moisture Sensor
Authors: An Jing Qiang , Shi Lin Rong , Zhang Feng Wei
Published: October 2014

For soil excavated a section is needed to dig in the direction of gravity artificial when soil moisture sensor is mounted against the general, and the size of cross section is proportional to the depth of buried sensors, making it time-consuming, and the original soil moisture distribution structure is destroyed, resulting in error between the original soil moisture and measured soil moisture profile is larger. A installation device for soil moisture sensor was designed in this paper, which can efficiently, rapidly, conveniently installation soil moisture sensors in the layered soil profile, and greatly improves the efficiency of soil sensor installation.
The Application of Hough Transform in Infrared Nondestructive Testing
Authors: Xiong Chen , Feng Li Chun
Published: October 2014

The automatic identification of thermography defects is one of important targets of infrared nondestructive testing technology. The analysis of thermal images based on the principle of Hough transform not only can reduce the workload of identification through human beings' eyes, but also can improve the accuracy of defect identification and improve the work efficiency. The paper introduces the basic principle of Hough transform, realizes the testing for the linear defects in images through MATLAB simulation experiment, and describes the testing of other geometric figures under Hough transfer.
Design of an Indoor Air Quality Monitor System Based on ARM11
Authors: Wang Xin Di , Yang Shu Hui
Published: October 2014

In this paper, a real time system based on ARM11 is designed to monitor the indoor air quality (IAQ) which includes the temperature, humidity and soot concentration. The system contains acquisition terminal and control terminal, and the two parts communicate through the wireless channel. The main function of the former is to collect IAQ indicators, while that of the later is to analyze and process the indicators collected, display the corresponding results. To effectively prompt or alarm the user, the core control unit of the control terminal creates corresponding control commands and texts to the speech synthesis chip which will drive the loudspeaker to sound. Hence, it plays an important role on the monitoring of the IAQ.
Design of Indoor Large-Scale Multi-Target Precise Positioning and Tracking System
Authors: Sun Hui Qin
Published: October 2014

This paper is to build a interior Large-scale multi-target precise positioning and tracking system.In-depth resear of a visual-based optical tracking technology, inertial tracking technology and multi-sensor data fusion technology.Breaking the graphics, images, data fusion, tracking and other related key technologies.Develop high versatility, real-time, robustness of a wide range of high-precision optical tracking system for interior Large-scale multi-target precise positioning and tracking system.