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Ramprasath M.,J.J. Engineering and Technology | Hariharan S.,TRP Engineering College
Proceedings of 2012 IEEE International Conference on Advanced Communication Control and Computing Technologies, ICACCCT 2012 | Year: 2012

Semantic similarity is an essential concept that widen across various fields such as artificial intelligence, natural language processing, information retrieval, relation extraction, document clustering and automatic data extraction. The study proposed in this paper focus on semantic similarity and counter measure on question answering task. Despite the usefulness of semantic similarity in these applications, finding the exact meaning between the words from question and answer pair has become a major challenge in question answering system. To recognize various relationships those exist between question and answer pair, measuring semantically is essential. We present study using a match maker algorithm for similarity measurement between question-answer pair. The study compares similarity measurement using match maker algorithm as against semantic similarity measure on Miller-Charles bench marked data set. This paper present study about different types of algorithm used to measure the semantic similarity between the words and those result compare with match maker algorithm. The experiments on real datasets shows matchmaker algorithm works better than web-based semantic similarity measure. © 2012 IEEE.

Jeyalakshmi K.,PSNA College of Engineering and Technology | Purushothaman K.K.,TRP Engineering College | Muralidharan G.,Gandhigram Rural Institute
Philosophical Magazine | Year: 2013

Vanadium pentoxide thin films of various thicknesses have been prepared by sol-gel spin coating method on glass and conducting substrates. X-ray diffraction analysis reveals crystalline nature for the 6-12 layered films (170-310 nm). The crystalline films indicate a preferential orientation of the crystallites along the (200) plane. FTIR studies of the V2O 5 xerogel show the presence of V-O-V and V= O bond confirming the formation of V2O5. The scanning electron microscope images reveal formation of nanostructures in the 6-12 layered films. Optical absorption studies indicate a band gap of 2.2-2.5 eV. Pseudocapacitance behaviour of the V2O5 films was studied using cyclic voltammetric technique and impedance analysis. V2O5 films of thickness 202 nm (8 layers) exhibit a specific capacitance of 346 F/g at a scan rate of 5 mV/s. © 2013 Copyright Taylor and Francis Group, LLC.

Jeyalakshmi K.,PSNA College of Engineering and Technology | Vijayakumar S.,Gandhigram Rural Institute | Purushothaman K.K.,TRP Engineering College | Muralidharan G.,Gandhigram Rural Institute
Materials Research Bulletin | Year: 2013

Interesting thin film electrodes of nickel doped vanadium pentoxide with different levels of doping (2.5-10 wt.%) are prepared on FTO and glass substrate at 300 C using sol-gel spin coating method. The structural and morphological studies are made to understand the nature of the surface of the thin films. The electrochemical characteristics have been investigated through cyclic voltammetry and ac impedance spectroscopy measurements. The doping of nickel with β-V2O5 has led to enhanced intercalation and deintercalation of ions. β-V2O5 films with 5 wt.% of Ni exhibit the maximum specific capacitance of 417 F/g at a scan rate of 5 mV/s, with a good cyclic stability making it a promising candidate for supercapacitor application. © 2013 Elsevier Ltd. All rights reserved.

Senthilkumar N.,Adhiparasakthi Engineering College | Tamizharasan T.,TRP Engineering College | Anandakrishnan V.,National Institute of Technology Tiruchirappalli
Measurement: Journal of the International Measurement Confederation | Year: 2014

In this work, effect of machining parameters cutting speed, feed rate and depth of cut, geometrical parameters cutting insert shape, relief angle and nose radius were investigated and optimized using Taguchi based grey relational analysis. 18 ISO designated uncoated cemented carbide inserts of different geometries were used to turn practically used automotive axles to study the influence of variation in carbide inserts geometry. Performance measures viz., flank wear, surface roughness and material removal rate (MRR) were optimized using grey relational grade, based on the experiments designed using Taguchi's Design of Experiments (DoE). A weighted grey relational grade is calculated to minimize flank wear and surface roughness and to maximize MRR. Analysis of variance shows that cutting insert shape is the prominent parameter followed by feed rate and depth of cut that contributes towards output responses. An experiment conducted with identified optimum condition shows a lower flank wear and surface roughness with higher MRR. The confirmation results obtained are confirmed by calculating confidence interval, which lies within the width of the interval. ©2014 Elsevier Ltd. All rights reserved.

Senthilkumar N.,Adhiparasakthi Engineering College | Tamizharasan T.,TRP Engineering College
Indian Journal of Engineering and Materials Sciences | Year: 2014

This paper focuses on the experimental investigation and analysis of temperature generated at the cutting zone during machining and the wear of cutting insert at the flank face and the relationship between these parameters. Uncoated cemented carbide inserts of different geometries are used to turn AISI 1045 steel. Three levels of cutting insert geometries cutting insert shape (included angle), relief angle and nose radius are chosen. Taguchi's design of experiments (DoE) is used to design the experiments and using signal-to-noise (S/N) ratio, the control parameters are analyzed, showing a correlation between the two responses. Analysis of variance is performed to determine the most significant factor over the responses and empirical models are developed for predicting the responses using multiple linear regression models. Cutting zone temperature is mostly influenced by nose radius followed by cutting insert shape and for flank wear the significance of cutting insert shape is more, followed by nose radius. Confirmation experiment performed with optimum cutting insert geometry shows a reduction in cutting zone temperature and flank wear.

Lakshmi S.,TRP Engineering College | Raja T.S.R.,Anna University
Turkish Journal of Electrical Engineering and Computer Sciences | Year: 2014

An observer controller for a buck converter is presented. A state feedback gain matrix is derived in order to achieve the stability of the converter and to ensure the robustness of the controller. A load estimator is designed to estimate the unmeasurable variables and to obtain the zero output voltage error. A pulse-width modulation scheme is adopted to obtain the output voltage regulation. In order to improve the transitory response and dynamic constancy of the converter, the controller parameters are designed based on the current mode control. The design is evaluated and verified using MATLAB/Simulink. An experimental set-up is done to evaluate the controller platform. © TUBITAK.

Tamizharasan T.,TRP Engineering College | Kumar Senthil N.,Anna University
World Journal of Modelling and Simulation | Year: 2014

This research work focusses on optimization of machining and geometrical parameters during turning AISI 1045 steel using carbide cutting tool insert, by Finite Element Analysis and Taguchi's Technique. Three levels of cutting speed, feed rate, depth of cut, cutting insert shape, relief angle and nose radius are chosen. A suitable L18 Orthogonal array is selected based on Taguchi's Design of Experiments (DoE) and the simulation analysis is carried out using DEFORM-3D, machining simulation software and the output quality characteristics such as tool-chip interface temperature, interface pressure, wear depth, cutting forces and tool stress are analyzed by Signal-to-Noise (S/N) ratio. Analysis of Variance is performed to determine the most contributing factor, which shows that cutting insert shape is the most prominent parameter contributing by 37.84%, cutting speed by 13.47% and depth of cut by 11.56%. From the optimum condition evolved, validation is done experimentally and by FEM. It is observed that 18.81% increase in quality characteristics are achieved using the optimum condition.

Tamizharasan T.,TRP Engineering College | Barnabas J.K.,Anjalai Ammal Mahalingam Engineering College | Pakkirisamy V.,Indian National Institute of Engineering
Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture | Year: 2012

The direct measurement of flank wear at regular intervals of time during machining consumes men and machine hours. This analysis focuses on the online monitoring of flank wear in turning from the experimentally observed audible acoustic emission signal. It is used as one of the indirect methods of monitoring flank wear in turning. The corresponding flank wear in all the test conditions for a machining time of 300 s are observed and recorded. When the value of the audible acoustic emission signal tends to reach the unsafe limit corresponding to the flank wear of above 0.2 mm, the operator is alerted to stop the operation to replace the tool. This technique minimizes the tool cost without sacrificing the quality of the final product. Also, this analysis inter-relates the performances of the design of experiments, regression analysis and simulated annealing algorithm to obtain the best possible solution. The result of this analysis identifies the optimal values of selected parameters for effective and efficient machining. The experimental, optimized and predicted values of flank wear are compared and correlated with the experimental audible acoustic emission signal. © IMechE 2012.

Nowadays, the energy recruitment increased day-today life. The energy usage can be reduced by means storing or recycle process. This work is focused on developing ternary eutectic mixture based on organic compound fatty acid like capric-myristic-palmitic acid in the mass ratio of 64.8:22.6:12.6 and optimize their thermal property by inorganic compound like exfoliated graphite (CA-MA-PA/xG) composites as phase change material (PCM) for energy storage. In this process xG was prepared from flake graphite, initially the graphite has undergone a carburization process for increase carbon content, then in a second step carburized graphite were undergone exfoliation with the addition of potassium permanganate and nitric acid in a ratio of 1:1:2 were done in an open atmosphere under roof of short length focusing by a Fresnel lens. The exfoliation of graphite was produced rapidly and efficiently within 3min. The xG were dispersed into CA-MA-PA under the assistance of high speed ultra-sonication in the mass ratio of 5% and 10%. The structural, thermal energy storage properties, thermal stability and thermal conductivity of novel composite (CA-MA-PA/xG) PCM was investigated. The thermal conductivity and thermal energy storage property of composite PCM when doped with 10% of xG were increased from 0.149W/mK to 0.180W/mK which showed increased about 20.8%. TG analysis tests revealed that the prepared CA-MA-PA/xG composite PCM has a high thermal stability in the working temperature range. The thermal energy storage for CA-MA-PA/xG (Tm=17.1°C; δHm=142.2J/g) for melting, (Tf=9.7°C; δHf=139.5J/g) for freezing respectively, for 90:10. The prepared CA-MA-PA/xG composite as PCM have a great potential application for low thermal energy storage. © 2015 Elsevier Ltd.

Rapid economic and social development has led to increase the demand on energy gradually. In thermal system, the energy can be stored for reusing or recycling purpose. The latent heat storage (LHS) is the most effective method for storing the thermal energy and it mainlydependson organic and inorganic Phase change material (PCM).This study is based on preparation of organic based ternary eutectic fatty acid mixture based on capric-myristic-palmitic acid (CA-MA-PA) as PCM in the mass ratio and optimizing their thermal behaviour by using solar enriched treated graphite and then exfoliated by microwave in the ratio 99.83:0.17.The structure morphology was analysed by using scanning electron microscope (SEM),itsfunctional group were proven by Fourier transform infrared spectroscopy (FT-IR) then phase change temperature composite PCM were obtained by using Differential Scanning Calorimetric (DSC).The thermal conductivity viewed by KD2pro were increased from 0.149W/mK to 0.190W/mK. Overall resultexamined that CA-MA-PA/Exfoliated graphite nanoplatelets (xGnP) can be used for low temperature LHS. © 2016 Elsevier Ltd.

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