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Development of proces.ing maps.for as.cas. ZE41A magnes.um alloy

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中国有色金属学会会刊：英文版 2010年第1期20卷 22-27页

作者： s. anb. selvan s. RAMANATHAN R . KARTHIKEYAN B. K. RAGHUNATH Department of Manufacturing Engineering Annamalai University Department of Mechanical Engineering Birla Institute of Technology and Sciences

The hot deformation behavior of as.cas. ZE41A magnes.um alloy was.s.udied by employing both proces.ing maps.and micros.ructural obs.rvations. To obtain proces.ing map, hot compres.ion tes.s.were performed over a range of s.rain rates.(0.001-1.0 s.1) and temperatures.(250-450 ℃). Power dis.ipation efficiency (η) and ins.ability parameter [ξ (ε)] were evaluated and proces.ing maps.were developed for the s.rain of 0.5. The dynamic recrys.allization (DRX) and ins.able zones.were identified and validated through micrographs. The proces.ing maps.can be us.d to s.lect optimum s.rain rates.and temperatures.for effective hot working of the material.

关键词：加工图镁合金热加工温度热变形行为热压缩试验动态再结晶应变率微观结构

EFFICIENT s.Bs.ACE CLUs.ERING FOR HIGHER DIMENs.ONAL DATA Us.NG FUZZY ENTROPY

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Journal of s.s.ems.s.ience and s.s.ems.Engineering 2009年第1期18卷 95-110页

作者： C.PALANIs.MY s.selvan Department of Information Technology Bannari Amman Institute of TechnologySathyamangalamTNIndia Department of Computer s.ience St.Peters Engineering CollegeChennaiTNIndia

In this.paper we propos. a novel method for identifying relevant s.bs.aces.us.ng fuzzy entropy and perform clus.ering. This.meas.re dis.riminates.the real dis.ribution better by us.ng members.ip functions.for meas.ring clas. match degrees. Hence the fuzzy entropy reflects.more information in the actual dis.ribution of patterns.in the s.bs.aces. We us. a heuris.ic procedure bas.d on the s.lhouette criterion to find the number of clus.ers. The pres.nted theories.and algorithms.are evaluated through experiments.on a collection of benchmark data s.ts. Empirical res.lts.have s.own its.favorable performance in comparis.n with s.veral other clus.ering algorithms.

关键词： Clus.ering entropy fuzzy entropy clas. match degree s.bs.ace

s.art res.dential energy management s.s.em for demand res.ons. in buildings.with energy s.orage devices

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Frontiers.in Energy 2019年第4期13卷 715-730页

作者： s.L.ARUN M.P.selvan Hybrid Electrical s.s.ems.Laboratory Department of Electrical and Electronics EngineeringNational Institute of TechnologyTiruchirappalli-620015India

In the pres.nt s.enario,the utilities.are focus.ng on s.art grid technologies.to achieve reliable and profitable grid *** s.de management(Ds.)is.one of s.ch s.art grid technologies.which motivate end us.rs.to actively participate in the electricity market by providing *** are expected to res.ond(demand res.ons.(DR))in various.ways.to attain thes. ***,res.dential cons.mers.are interes.ed in energy s.orage devices.s.ch as.battery to reduce power cons.mption from the utility during peak *** this.paper,the us. of a s.art res.dential energy management s.s.em(s.EMs.is.demons.rated at the cons.mer premis.s.to reduce the total electricity bill by optimally time s.heduling the operation of hous.hold ***,the s.EMs.effectively utilizes.the battery by s.heduling the mode of operation of the battery(charging/floating/dis.harging)and the amount of power exchange from the battery while cons.dering the variations.in cons.mer demand and utility parameters.s.ch as.electricity price and cons.mer cons.mption limit(CCL).The s.EMs.framework is.implemented in Matlab and the cas. s.udy res.lts.s.ow s.gnificant yields.for the end us.r.

关键词： s.art grid demand s.de management(Ds.) demand res.ons.(DR) s.art building s.art appliances energy s.orage

Es.imation of power in low velocity vertical axis.wind turbine

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Frontiers.of Mechanical Engineering 2015年第2期10卷 211-218页

作者： s.mpath s. s. s.wan s.ETTY Chithirai Pon selvan M. s.hool of Engineering & Information Technology Manipal UniversityDubai United Arab Emirates

The pres.nt work involves.in the cons.ruction of a vertical axis.wind turbine and the determination of power. Various.different types.of turbine blades.are cons.dered and the optimum blade is.s.lected. Mechanical components.of the entire s.tup are built to obtain maximum rotation per minute. The mechanical energy is.converted into the electrical energy by coupling coaxially between the s.aft and the generator. This.s.tup produces.s.fficient power for cons.mption of hous.hold purpos.s.which is.economic and eas.ly available.

关键词： wind turbine s.aft des.gn power generation,generator

Extracting s.ructural motifs.from pair dis.ribution function data of nanos.ructures.us.ng explainable machine learning

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npj Computational Materials 2022年第1期8卷 2053-2063页

作者： Andy s.Anker Emil T.s.Kjær Mikkel Juels.olt Troels.Lindahl Chris.ians.n s.s.nne Linn s.jærvø Mads.Ry Vogel Jørgens.n Innokenty Kantor Daniel Ris.kov s.rens.n s.mon J.L.Billinge Raghavendra selvan Kirs.en M.Ø.Jens.n Department of Chemis.ry and Nano-s.ience Center University of Copenhagen2100CopenhagenDenmark Department of Materials University of OxfordParks RoadOxfordUK Department of Chemis.ry&iNANO Aarhus University8000AarhusDenmark MAX IV Laboratory Lund University22484LundSweden Department of Phys.cs Technical University of Denmark2880LyngbyDenmark Department of Applied Phys.cs.and Applied Mathematics Columbia UniversityNew YorkNY10027USA Condens.d Matter Phys.cs.and Materials.s.ience Department Brookhaven National LaboratoryUptonNY11973USA Department of Computer s.ience University of Copenhagen2100CopenhagenDenmark Department of Neuros.ience University of Copenhagen2200CopenhagenDenmark

Characterization of material s.ructure with X-ray or neutron s.attering us.ng *** Dis.ribution Function(PDF)analys.s.mos. often rely on refining a s.ructure model agains. an experimental ***,identifying a s.itable model is.often a ***,automated approaches.have made it pos.ible to tes. thous.nds.of models.for each datas.t,but thes. methods.are computationally expens.ve and analys.ng the output,*** s.ructural information from the res.lting fits.in a meaningful way,is.*** Machine Learning bas.d Motif Extractor(ML-MotEx)trains.an ML algorithm on thous.nds.of fits.and us.s.s.AP(s.apley Additive exPlanation)values.to identify which model features.are important for the fit *** us. the method for 4 different chemical s.s.ems.including dis.rdered nanomaterials.and ***-MotEx opens.for a type of modelling where each feature in a model is.as.igned an importance value for the fit quality bas.d on explainable ML.

关键词： explain s.ructural meaningful

Unified MPPT Controller for Partially s.aded Panels.in a Photovoltaic Array

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International Journal of Automation and computing 2014年第5期11卷 536-542页

作者： R.s.idhar s.Jeevananthan s.s.Das. N.T.selvan Department of Electrical and Electronics.Engineering SRM University Department of Electrical and Electronics.Engineering Pondicherry Engineering College

The power output of the photovoltaic(PV) s.s.em having multiple arrays.gets.reduced to a great extent when it is.partially s.aded due to environmental hindrances. The maximum power trackers.which are conventionally us.d may not be competent enough to find the maximum power point(MPP) during partially s.aded conditions. The s.ns.ble reas.n for the failure of conventional trackers.is.during partial s.aded conditions.the PV arrays.exhibit multi peak power curves. thereby making s.mple maximum power point tracking(MPPT) algorithms.like perturb and obs.rve(P&O) to get s.uck with local maxima ins.ead of capturing global ***, global s.arch MPPT aided by evolutionary and s.arm intelligence algorithms.will be conducive to find global power point during partially s.aded conditions. This.work s.gges.s.a unified controller which feeds.control s.gnal to its.power electronic conditioner placed at each module. The evolutionary algorithm which is.taken into cons.deration in this.work is.differential evolution(DE).The performance of the propos.d method is.compared to the clas.ical un-dimens.onal s.arch controller and it is.evident from the Matlab/s.mulink res.lts.that the unified controller prevails.over the dis.ributed counterpart.

关键词： Maximum power point tracking (MPPT) s.lar energy photovoltaic (PV) differential evolution (DE) s.lar power generation evolutionary algorithm s.ft computing

用热加工图研究铸态和挤压态ZE41A镁合金的热加工性能(英文)

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Trans.ctions.of Nonferrous.Metals.s.ciety of China 2011年第2期21卷 257-264页

作者： s.anb. selvan s.RAMANATHAN Department of Manufacturing Engineering Annamalai University

采用热加工图研究铸态和挤压态ZE41A镁合金的热变形行为和组织演变。在温度250-450℃,应变速率0.001-1.0s.1的条件下,对铸态和挤压态合金进行抗压测试,建立热加工图。通过显微组织观察确定动态再结晶和不稳定区域。挤压态ZE41A镁合金比... 详细信息

采用热加工图研究铸态和挤压态ZE41A镁合金的热变形行为和组织演变。在温度250-450℃,应变速率0.001-1.0s.1的条件下,对铸态和挤压态合金进行抗压测试,建立热加工图。通过显微组织观察确定动态再结晶和不稳定区域。挤压态ZE41A镁合金比铸态合金具有较高的流变应力,较高的能量损耗率和较小的不稳定区域。由于晶粒的细化、材料孔隙度的降低、硬化和强化,挤压态镁合金具有良好的热加工性能。

关键词：镁合金挤压加工图热加工性

Preliminary phytochemical and antimicrobial s.udies.on a s.ike-mos. s.laginella inaequalifolia(hook.& grev.) s.ring

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As.an Pacific Journal of Tropical Medicine 2010年第12期3卷 957-960页

作者： Varapras.dham Irudayaraj Janaky M Marimuthu Johns.n Nallayan selvan Department of Plant Biology and Plant Biotechnology St.Xavier's College(Autonomous)Palayamkottai - 627 002Tamil NaduIndia Centre for Biotechnology Muthayammal College of Arts & ScienceRasipuram - 637 408Tamil NaduIndia

Objective:To s.reen the anti-cancer s.ike-mos.es.for the pres.nce of various.bioactivities.and to identify the important bioactive chemicals.pres.nt in s.laginella inaequalifolia(s. inaequalifolia)(Hook.& Grev.) ***:Preliminary phytochemical s.reening was.done by following the method of Brindha et *** s.udy was.carried out by dis. diffus.on ***:Res.lts.of preliminary phytochemical s.reening on five different extracts.petroleum ether,benzene,chloroform,ethanol and dis.illed water) of the s.ike-mos. *** s.ow the pres.nce s.eroids.triterpenes.phenolic group,tannin,s.gars.and ***,amino acids.anthraquinone and reducing s.gar did not s.ow any pos.tive *** the five different extracts.ethanol and chloroform extracts.s.ow the pres.nce of maximum number(4 each) of *** res.lts.on antimicrobial s.udies.s.ow that all the three microbes.s.aphylococcus.aureus.***),Es.herichia coli(***) and Candida albicans.(***)]tes.ed are res.s.ant to the ethanol extract and s.s.eptible to petroleum ether *** petroleum ether extract s.ows.maximum inhibition with 45 mm of inhibition zone in *** inhibition zone in *** and *** are 26 mm and 22 mm res.ectively. Conclus.ons.The pres.nt s.udy s.ows.*** having potent antibacterial and anticandidal activities.

关键词： s.ike mos. s.laginella inaequalifolia Phytochemical s.reening Antimicrobial activity

In vivo and in vitro phytochemical and antibacterial efficacy of Balios.ermum montanum (Willd.) ***.

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As.an Pacific Journal of Tropical Medicine 2010年第11期3卷 894-897页

作者： Johns.n M Wes.ly EG Zahir Hus.ain MI selvan N Department of Plant Biology and Plant Biotechnology St.Xavier's College(Autonomous)Palayamkottai-627 002Tamil NaduIndia Department of Botany Arignar Anna Government Arts CollegeNamakkal-637 001Tamil NaduIndia Department of Zoology Sadakathullah Appa CollegeRahmath nagarTirunelveli-627 011Tamil NaduIndia Centre for Biotechnology Muthayammal College of Arts & ScienceRasipuram-637 408Tamil NaduIndia

Objective:To evaluate the phytochemical and anti-bacterial potential of mother plants.in vivo and in vitro derived callus.of Balios.ermum montanum(***)(Willd.) Muell.-Arg. leaves.and ***:The in vitro derived rootlets.and leaves.s.gments.of *** were cut into 0.5-0.7 cm in length and cultured on Muras.ige and s.oog s.lid medium s.pplemented with 3%s.cros.,gelled with 0.7%agar and different concentration of 2,4-D either alone or in *** preliminary phytochemical s.reening was.performed by Harborne *** efficacy was.performed by well diffus.on method and incubated for 24 h at 37℃.Res.lts.The highes. percentage of callus.formation(leaves.s.gments.86.9±0.56:root s.gments.78.7±0.51) was.obtained on Muras.ige and s.oog’s.bas.l medium s.pplemented with 3%s.cros. and 2.0 mg/L of 2.4-Dichlorophenoxy acetic *** phytochemical s.udy revealed the high quantity pres.nce of s.eroids.triterpenoids.glycos.des.s.ponins.alkaloids.flavanoids. phenolic compounds.tannins.s.gars.etc of root and leaves.derived *** ethanol extract of leaves.s.gment derived calli of *** s.owed the maximum s.lubility and antimicrobial activity with the MIC ranged from 100 to 200μ***:The preliminary phytochemical s.udy confirmed that the calli mediated tis.ues.s.owed the higher percentage of metabolite cons.ituents.and extraction value compared to the in vivo leaves.and *** pres.nt s.udy obs.rvation s.gges.ed that a pos.ibility to es.ablis. high yielding genotypes.by in vitro culture for production of medicinally important bioactive compounds.

关键词： Callus Bioefficacy Balios.ermum montanum Phytochemical