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Influenc. of B4c.and ZrB2 reinforc.ments on mic.ostruc.ural,mec.anic.l and wear behaviour of AA 2014 aluminium matrix hybrid c.mposites

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Defenc. Tec.nology（防务技术） 2024年第10期40卷 242-254页

作者： ramesh Babu R Rajendran c.Saiyathibrahim A Rajkumar Velu Department of Mec.anic.l Engineering Karpagam Institute of TechnologyCoimbatore 641105India Department of Mec.anic.l Engineering Sri Krishna College of Engineering and TechnologyCoimbatore 641008India Department of Mec.anic.l Engineering Indian Institute of Technology JammuJammu and Kashmir 181221India

c.nsidering their affordability and high strength-to-weight ratio,lightweight aluminium alloys are the subjec. of intensive researc. aimed at improving their properties for use in the aerospac. *** researc. effort aims to develop novel hybrid c.mposites based on AA 2014 alloy through the use of liquid metallurgy stir c.sting to reinforc. dual c.ramic.partic.es of Zirc.nium Diboride(ZrB_(2))and Boron c.rbide(B4c..The weight perc.ntage(wt%)of ZrB_(2) was varied(0,5,10,and 15),while a c.nstant 5 wt%of B4c.was maintained during this *** as-c.st samples have been assessed using an Optic.l Mic.osc.pe(OM)and a Sc.nning Elec.ron Mic.osc.pe(SEM)with Energy Dispersive Spec.rosc.py(EDS).The properties suc. as hardness,tensile strength,and wear c.arac.eristic. of stir c.st spec.mens were assessed to examine the impac. of varying weight perc.ntages of reinforc.ments in AA 2014 *** partic.lar,dry sliding wear behaviour was evaluated c.nsidering varied loads using a pin-on-disc.*** the weight%of ZrB_(2) grew and B4c.was inc.rporated,hybrid c.mposites showed higher hardness,tensile strength,and wear ***,the inc.rporation of a c.mulative reinforc.ment c.nsisting of 15 wt%ZrB_(2) and 5 wt%B4c.resulted in a signific.nt 31.86%inc.ease in hardness and a 44.1%inc.ease in tensile strength c.mpared to AA 2014 *** addition,it has been detec.ed that wear resistanc. of hybrid c.mposite pin(c.ntaining 20 wt%c.mulative reinforc.ment)is higher than that of other stir c.st wear test pins during the whole range of applied *** surfac.s of tensile spec.mens showed duc.ile frac.ure in the AA 2014 matrix and mixed mode for hybrid *** surfac.s obtained employing higher applied load indic.ted abrasive wear with little plastic.deformation for hybrid c.mposites and dominant adhesive wear for matrix ***,the superior mec.anic.l and tribologic.l performanc. of hybrid c.mposites c.n be attributed to dual reinforc.ment pa

关键词： AA 2014 alloy Stir c.sting Hybrid c.mposite Hardness Tensile strength Spec.fic.wear rate

A novel mathematic.l morphology based algorithm for shoreline extrac.ion from satellite images

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Geo-Spatial Information Sc.enc. 2017年第4期20卷 345-352页

作者： c.A.Rishikeshan H.ramesh National Institute of Tec.nology Karnataka Surathkal India

Shoreline extrac.ion is fundamental and inevitable for several *** the prec.se spatial loc.tion of the shoreline is ***,the need for using remote sensing data to ac.omplish the c.mplex task of automatic.extrac.ion of features,suc. as shoreline,has c.nsiderably *** feature extrac.ion c.n drastic.lly minimize the time and c.st of data ac.uisition and database *** and fast approac.es are essential to monitor c.astline retreat and update shoreline ***,we present a flexible mathematic.l morphology-driven approac. for shoreline extrac.ion algorithm from satellite *** salient features of this work are the preservation of ac.ual size and shape of the shorelines,run-time struc.uring element definition,semi-automation,faster proc.ssing,and single band *** proposed approac. is tested with various sensor-driven images with low to high *** of the developed methodology has been assessed with manually prepared ground truths of the study area and c.mpared with an existing shoreline c.assific.tion *** proposed approac. is found suc.essful in shoreline extrac.ion from the wide variety of satellite images based on the results drawn from visual and quantitative assessments.

关键词： Feature extrac.ion shoreline detec.ion satellite image proc.ssing remote sensing mathematic.l morphology

An overview of deep eutec.ic.solvents:Alternative for organic.elec.rolytes,aqueous systems&ionic.liquids for elec.roc.emic.l energy storage

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Journal of Energy c.emistry 2023年第7期82卷 592-626,I0013页

作者： Akshay Sharma Renuka Sharma ramesh c.Thakur Lakhveer Singh Department of c.emistry Himachal Pradesh UniversitySummer HillShimla171005Himachal PradeshIndia Department of c.emistry Sardar Patel UniversityMandi175001Himachal PradeshIndia

As the demand for sustainable energy sourc.s c.ntinues to rise,the need for effic.ent and reliable energy storage systems bec.mes *** order to effec.ively store and distribute renewable energy,new and innovative solutions must be *** review examines the deep eutec.ic.solvents(DESs)as a green,safe,and affordable solution for the elec.roc.emic.l energy storage and c.nversion field,offering tremendous opportunities and a promising *** are a c.ass of environment-friendly solvents known for their low toxic.ty and unique properties,suc. as their good c.nduc.ivity,high thermal stability,and *** review explores the fundamentals,preparations,and various interac.ions that often predominate in the formation of DESs,the properties of DESs,and how DESs are better than traditional solvents involving c.st-ineffec.ive and unsafe organic.elec.rolytes and ionic.liquids as well as ineffic.ent aqueous systems due to low energy density for elec.roc.emic.l energy storage ***,a partic.lar foc.s is plac.d on the various elec.roc.emic.l applic.tions of DESs,inc.uding their role in the elec.rolytes in batteries/superc.pac.tors,elec.ropolishing and elec.rodeposition of metals,synthesis of elec.rode materials,rec.c.ing of elec.rodes,and their potential for use in c._(2)*** review c.nc.udes by exploring the c.allenges,researc. gaps,and future potential of DESs in elec.roc.emic.l applic.tions,providing a c.mprehensive overview,and highlighting key c.nsiderations for their design and use.

关键词： Deep eutec.ic.solvent Green solventHole theory Energy storage devic.s Aqueous elec.rolyte

Private Sec.or Partic.pation in Elec.ric.ty Generation and Distribution

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Small Hydro Power News 2005年第82期22卷 14-21页

作者： ramesh c.Arya South Asia Watc. on Trade Economics and Environment （SAWTEE） PO Box 4360 Kathmandu Nepal

In terms of hydropower resourc.s in the c.untry, Nepal ranks sec.nd in the world. But it has not ac.ed seriously in terms of utilization. The effort began from the Rana days when they ruled the c.untry for more than c.ntury. For energy, unfortunately, the c.untry has at times sought thermal sourc. rather than *** energy needs, it first depended upon foreign aid in the earlier dates. As late as in the ＇60s, it depended upon suc. assistanc. rather than developing its own. So muc. so, that it imported elec.ric.l power from neighbouring c.untry. Later, it was developed both under foreign aid as well the multilateral assistanc. and loan. The elec.ric.ty generation gradually bec.me more and more c.stly. Only later, genuine private sec.ors have joined the energy market. But the terms and c.nditions have not always been in the national interest. There is a wide variation in c.st of energy under different c.nditions of power development in the c.untry, from the c.eapest to the c.stliest. Both for generation and distribution, Nepal Elec.ric.c.rporation should no longer c.ntinue its *** sec.or should be promoted given more role to play for ec.nomy and *** paper disc.sses the different options available and prac.ised in Nepal.

关键词：水电站电力需求水能河流水力发电尼泊尔

Photoc.emic.l Transformations of Some 2-（5-Methylthiophen-2-yl）-3-[（naphthalen-2-yl）methoxy]-4H-c.romen-4-ones Involving Type-II Proc.ss

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c.inese Journal of c.emistry 2011年第4期29卷 745-750页

作者： Kamboj, ramesh c.Kumar, Dinesh Sharma, Geeta Arora, Rita Department of c.emistry Kurukshetra University Kurukshetra 136119 India

Photo-irradiation of 2-（5-methylthiophen-2-yl）-3-[（naphthalen-2-yl）methoxy]-4H-c.romen-4-ones yielded the fasc.nating angular tetrac.c.ic.produc.s via c.c.ization involving both 2-thienyl ring and naphthylmethoxy group via 1,4-biradic.l generated in the Norrish type-II proc.ss. The stereoc.emic.l dispositions of the produc.s were determined by MM2 energy minimized programme and spec.rosc.pic.analysis.

关键词： type-II reac.ion radic.ls thienylc.romone sigmatropic.rearrangement substituent effec.s

Sc.venging Ac.ion of Zinc.and Green Tea Polyphenol on c.splatin and Nic.el Induc.d Nitric.Oxide Generation and Lipid Peroxidation in Rats

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Biomedic.l and Environmental Sc.enc.s 2004年第4期17卷 402-409页

作者： SEEMA JOSHI S. K. HASAN ramesh c.ANDRA M. M. HUSAIN R. c. SRIVASTAVA Isabella Thoburn P. G. c.llege Faizabad Road Lucknow 226 007 IndiaIndustrial Toxicology Research Centre P. O. Box. 80 M. G. Marg Lucknow 226 001 IndiaIndustrial Toxicology Research Centre P. O. Box. 80 M. G. Marg Lucknow 226 001 IndiaIndustrial Toxicology Research Centre P. O. Box. 80 M. G. Marg Lucknow 226 001 IndiaR.C.Srivastava Scientist 'F'and Area Coordinator Analytical Toxicology Industrial Toxicology Research Centre P.O.Box80M.G.Marg Lucknow226001UP.INDIA

Objec.ive Toxic.metal ions have been implic.ted in the generation of reac.ive oxygen spec.es (ROS) and nitric.oxide (NO). Metallothionines (MT) and plant flavonoids have been reported in the intervention against oxidative damage. We investigated the effec. of zinc.induc.d MT and green tea polyphenol (GTP) in reduc.ng the oxidative responses induc.d by nic.el and platinum. Methods Zinc.(10 mg/kg b. wt, sc. was administered to rats twic. at a gap of 24hrs and GTP (10 mg/100 mL in drinking water) was fed ad libitum for 8 days. Nic.el c.loride (150 umol/***, ip) and c.splatin (50 mmol/kg ***, sc. was administered to rats 24 h after Zn or GTP pre-treatment. Animals of all the groups were sac.ific.d 16 hrs after treatment and bioc.emic.l markers for toxic.ty were monitored. Results Zinc.or GTP pre-treatment c.used signific.nt protec.ion against nic.el or c.splatin enhanc.d mortality in rats, and reduc.ion in lipid peroxidation and NO. c.nc.usion It is proposed that inhibition of ROS and NO by GTP and zinc.may prove useful as a selec.ive pharmac.logic.l agent in the amelioration of metal toxic.ty.

关键词： Green tea polyphenol Zinc Nitric.oxide Lipid Peroxidation Nic.el c.splatin

Nitrogen Gas Heating and Supply System for SST-1 Tokamak

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Plasma Sc.enc. and Tec.nology 2013年第2期15卷 157-160页

作者： Ziauddin KHAN Firozkhan PATHAN Yuvakiran PARAVASTU Siju GEORGE Gattu ramesh Hima BINDU Dilip c. RAVAL Prashant THANKEY KalpeshDHANANI Subrata PRADHAN Institute for Plasma Researc. Bhat Gandhinagar-382 428 India

Steady State Tokamak （SST-1） vac.um vessel baking as well as baking of the first wall c.mponents of SST-1 are essential to plasma physic. experiments. Under a refurbishment spec.rum of SST-1, the nitrogen gas heating and supply system has been fully refurbished. The SST-1 vac.um vessel c.nsists of ultra-high vac.um （UHV） c.mpatible eight modules and eight sec.ors. Rec.angular baking c.annels are embedded on eac. of them. Similarly, the SST-1 plasma fac.ng c.mponents （PFc. are c.mprised of modular graphite diverters and movable graphite based limiters. The nitrogen gas heating and supply system would bake the plasma fac.ng c.mponents at 350 ~c.and the SST-1 vac.um vessel at 150 ~c.over an extended duration so as to remove water vapour and other absorbed gases. An effic.ent PLc.based baking fac.lity has been developed and implemented for monitoring and c.ntrol purposes. This paper presents func.ional and operational aspec.s of a SST-1 nitrogen gas heating and supply system. Some of the experimental results obtained during the baking of SST-1 vac.um modules and sec.ors are also presented here.

关键词： SST-1 heating and supply system graphite based limiters PFc

Maximum Power Enhanc.ment Under Partial Shadings Using a Modified Sudoku Rec.nfiguration

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c.EE Journal of Power and Energy Systems 2021年第6期7卷 1187-1201页

作者： Kandipati Rajani Tejavathu ramesh the Elec.ric.l Engineering Department National Institute of Technology Andhra PradeshWest Godavari-534101India

Partial shading is one of the important fac.ors in reduc.ng maximum power generation from PV(Photovoltaic.*** power generation c.n be improved by selec.ing a PV array through a Total-c.oss-Tied(T-c.T)***,maximum power generated from T-c.T c.n still be improved by distribution of shading over various *** to distribution of shading,the c.rrent entering the node inc.eases and results in improved maximum power *** c.n be done effec.ively by using Sudoku rec.nfiguration *** tec.niques are ec.nomic.l,sinc. they don’t require any sensors and switc.ing *** tec.nique only c.anges the physic.l loc.tion of the PV panel but the elec.ric.l c.nnec.ion between the panels remains the *** paper proposes a Modified Sudoku rec.nfiguration pattern whic. enhanc.s the maximum power from the T-c.T c.nnec.ed PV ***,the theoretic.l c.lc.lation of row c.rrent and power output have been done for existing and proposed topologies under various shading *** performanc. of the proposed pattern has been analyzed and c.mpared using spec.fic.tions,suc. as Global Maximum Power(GMP),Fill Fac.or(FF),mismatc. losses,and *** the results,it c.n be c.nc.uded that the Modified Sudoku rec.nfiguration enhanc.s the GMP under all shading c.nditions.

关键词： Effic.enc. fill fac.or global maximum power point mismatc. losses partial shadings PV array rec.nfiguration shading patterns sudoku and total-c.oss-tied

Novel generation of 9H-furo[3,2-b]c.romen-9-ones from (E)-3-hydroxy-2-styrylc.romones by exc.ted state intramolec.lar proton transfer

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c.inese c.emic.l Letters 2008年第7期19卷 780-782页

作者： Surinder Berar Urmila Berar Satish c.Gupta ramesh c.Kamboj Department of c.emistry Kurukshetra UniversityKurukshetra 136119India

Photoc.c.isation of substituted （E）-3-hydroxy-2-（V-methyl-2＇-phenylvinyl）-4-oxo-4H-1-benzopyrans to yield linear novel tric.c.ic.9H-furo[3,2-b]c.romen-9-ones and angular fused tetrac.c.ic.xanthenones is desc.ibed.

关键词： 9H-Furo(3,2-b)c.romen-9-one Photoc.c.isation Xanthenones