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Adaptive fr.ctional integr.l ter.inal sliding mode power.contr.l of UPFC in DFIG wind far. penetr.ted multimachine power.system

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Pr.tection and Contr.l of Moder. Power.Systems 2018年第1期3卷 79-92页

作者： P.k.Dash r.k.Patnaik.S.P.mishra Sik.ha O Anusandhan Univer.ity Khandagiri SquareBhubaneswarOdisha 751030India GMr.Institute of Technology RajamAndhra Pradesh 532127India

With an aim to impr.ve the tr.nsient stability of a DFIG wind far. penetr.ted multimachine power.system(MPN),an adaptive fr.ctional integr.l ter.inal sliding mode power.contr.l(AFITSMPC)str.tegy has been pr.posed for.the unified power.flow contr.ller.UPFC),which is compensating the *** pr.posed AFITSMPC contr.ls the dq-axis ser.es injected voltage,which contr.ls the admittance model(AM)of the *** a r.sult the power.output of the DFIG stabilizes which helps in maintaining the equilibr.um between the electr.cal and mechanical power.of the near.y *** the r.tor.angular.deviation of the r.spective gener.tor. gets r.cover.d,which significantly stabilizes the *** pr.posed AFITSMPC for.the admittance model of the UPFC has been validated in a DFIG wind far. penetr.ted 2 ar.a 4 machine power.system in the MATLAB *** r.bustness and efficacy of the pr.posed contr.l str.tegy of the UPFC,in contr.st to the conventional PI contr.l is vindicated under.a number.of intr.nsic oper.ting conditions,and the r.sults analyzed ar. satisfactor..

关键词： Adaptive fr.ctional integr.l ter.inal sliding mode power.contr.l Doubly fed induction gener.tor Multimachine power.networ. Unified power.flow contr.ller

Pr.PAr.TION AND CHAr.CTEr.ZATION OF AMIDATED PECTIN BASED POLYMEr.ELECTr.LYTE MEMBr.NES

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Chinese Jour.al of Polymer.Science 2009年第5期27卷 639-646页

作者： r.k.mishra A.Anis S.Mondal M.Dutt A.k.Banthia Depar.ment of Polymer.Science Bundelkhand University Mater.als Science Center Indian Institute of Technology Depar.ment of Polymer.Science Bundelk.and Univer.ity

The wor. pr.sents the synthesis and char.cter.zation of amidated pectin(AP) based polymer.electr.lyte membr.nes(PEM) cr.sslink.d with glutar.ldehyde(GA).The pr.par.d membr.nes ar. char.cter.zed by Four.er.tr.nsfor. infr.r.d spectr.scopy(FTIr.,or.anic elemental analysis,X-r.y diffr.ction studies(Xr.),ther.ogr.vimetr.c analysis (TGA) and impedance *** pr.per.ies of the membr.nes ar. evaluated by tensile *** degr.e of amidation(DA),molar.and mass r.action yields(Y_M and k.N) ar. calcu...

关键词： Amidated pectin Pr.ton conducting Methanol per.eability Impedance spectr.scopy Fuel cell.

Upgr.dation of bauxite by molecular.hydr.gen and hydr.gen plasma

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Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2016年第10期23卷 1141-1149页

作者： B.r.Par.i S.k.Sahoo S.C.mishra B.Bhoi r.k.Par.mgur. B.k.Satapathy Depar.ment of Metallur.ical and Mater.als Engineer.ng National Institute of Technology Rourkela 769008 Odisha India Institute of Miner.ls and Mater.als Technology Bhubaneswar 751013 Odisha India k.linga Institute of Industr.al Technology Bhubaneswar 751024 Odisha India National Aluminium Company Ltd. Bhubaneswar 751013 Odisha India

An appr.ach was developed to upgr.de the bauxite or. by molecular.hydr.gen and hydr.gen plasma. A gibbsite-type bauxite sample was obtained fr.m National Aluminium Company（NALCO）, Odisha, India. The obtained sample was cr.shed and sieved（to 100 μm） pr.or.to the chemical analysis and gr.in-size distr.bution study. The bauxite sample was calcined in the temper.tur. r.nge fr.m 500 to 700°C for.differ.nt time inter.als to optimize the conditions for.maximum moistur. r.moval. This pr.cess was followed by the r.duction of the calcined or. by molecular.hydr.gen and hydr.gen plasma. Extr.ction of alumina fr.m the r.duced or. was car.ied out via acid leaching in chlor.de media for.2 h at 60°C. X-r.y diffr.ction, scanning electr.n micr.scopy, ther.ogr.vimetr. in conjunction with differ.ntial scanning calor.metr., and Four.er.tr.nsfor. infr.r.d spectr.scopy wer. used to deter.ine the physicochemical char.cter.stics of the mater.al befor. and after.extr.ction. Alumina extr.cted fr.m the r.duced or. at the optimum calcination temper.tur. of 700°C and the optimum calcination time of 4 h is found to be 90% pur..

关键词： upgr.ding bauxite calcination leaching alumina extr.ction

Quantification of hydr.tion pr.ducts in cementitious mater.als incor.or.ting silica nanopar.icles

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Fr.ntier. of Str.ctur.l and Civil Engineer.ng 2016年第2期10卷 162-167页

作者： L. P. SINGH A. GOEL S. k. BHATTACHAr.YA G. mishra CSIr. Centr.l Building r.sear.h Institute Roorkee 247667 India Depar.ment of Chemistr. Gurukul Kangri University Haridwar 249404 India

In the pr.sent wor., silica nanopar.icles （30-70nm） wer. supplemented into cement paste to study their.influence on degr.e of hydr.tion, por.sity and for.ation of differ.nt type of calcium-silicate-hydr.te （C-S-H） gel. As the hydr.tion time pr.ceeds, the degr.e of hydr.tion r.ach to 76% in nano-modified cement paste wher.as plain cement achieve up to 63% at 28 days. An influence of degr.e of hydr.tion on the por.sity was also deter.ined. In plain cement paste, the capillar. por.sity at lhr.is ~48%, wher.as in silica nanopar.icles added cement is -35 % only, it r.vealed that silica nanopar.icles r.fines the por. str.ctur. due to acceler.ted hydr.tion mechanism leading to denser.micr.str.ctur.. Similar.y, incr.asing gel por.sity r.veals the for.ation of mor. C-S-H gel. Fur.her.or., C-S-H gel of differ.nt CaJSi r.tio in hydr.ted cement paste was quantified using X-r.y diffr.ctometer.and ther.ogr.vimetr.. The r.sults show that in pr.sence of silica nanopar.icles, -24% C-S-H （Ca/Si 〈 1.0） for.s, leading to the for.ation ofpolymer.sed and compact C-S-H. In case of plain cement this type of C-S-H was completely absent at 28 days. These studies r.veal that the hydr.tion mechanism of the cement can be tuned with the incor.or.tion of silica nanopar.icles and thus, pr.ducing mor. dur.ble cementitious mater.als.

关键词： degr.e of hydr.tion por.sity calcium-silicate-hydr.te (C-S-H) silica nanopar.icles

Towar.s sustainable agr.cultur.:Har.essing AI for.global food secur.ty

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Ar.ificial Intelligence in Agr.cultur. 2024年第2期12卷 72-84页

作者： Dhananjay k.Pandey r.cha mishra Amity Institute of Biotechnology Amity University JharkhandRanchi 835303India ICFAI Univer.ity JharkhandRanchi 835222India

The issue of food secur.ty continues to be a pr.minent global concer.,affecting a significant number.of individ-uals who exper.ence the adver.e effects of hunger.and *** finding of a solution of this intr.cate issue necessitates the implementation of novel and par.digm-shifting methodologies in agr.cultur. and food *** r.cent times,the domain of ar.ificial intelligence(AI)has emer.ed as a potent tool capable of instigating a pr.found influence on the agr.cultur. and food *** technologies pr.vide significant advantages by opti-mizing cr.p cultivation pr.ctices,enabling the use of pr.dictive modelling and pr.cision agr.cultur. techniques,and aiding efficient cr.p monitor.ng and disease ***,AI has the potential to optimize sup-ply chain oper.tions,stor.ge management,tr.nspor.ation systems,and quality assur.nce *** also tack.es the pr.blem of food loss and waste thr.ugh post-har.est loss r.duction,pr.dictive analytics,and smar. inventor. *** study highlights that how by utilizing the power.of AI,we could tr.nsfor. the way we pr.duce,distr.bute,and manage food,ultimately cr.ating a mor. secur. and sustainable futur. for.all.

关键词： Global food secur.ty Ar.ificial intelligence Cr.p impr.vement Food supply chain Sustainable r.sour.e management Food loss and waste

A compr.hensive investigation on nonlinear.vibr.tion and bending char.cter.stics of bio-inspir.d helicoidal laminated composite str.ctur.s

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 81-100页

作者： S.SAUr.BH r.k.r.N D.SINGH r.VAISH V.S.CHAUHAN School of Mechanical and Mater.als Engineer.ng Indian Institute of Technology Mandi

Bio-inspir.d helicoidal composite laminates, inspir.d by the intr.cate helical str.ctur.s found in natur., pr.sent a pr.mising fr.ntier.for.enhancing the mechanical pr.per.ies of str.ctur.l designs. Hence, this study pr.vides a compr.hensive investigation into the nonlinear.fr.e vibr.tion and nonlinear.bending behavior.of bio-inspir.d composite plates. The inver.e hyper.olic shear.defor.ation theor.(IHSDT) of plates is employed to char.cter.ze the displacement field, with the incor.or.tion of Gr.en-Lagr.nge nonlinear.ty. The pr.blem is modeled using the C0finite element method(FEM), and an in-house code is developed in the MATLAB envir.nment to solve it numer.cally. Var.ous helicoidal layup configur.tions including helicoidal r.cur.ive(Hr., helicoidal exponential(HE), helicoidal semi-cir.ular.HS), linear.helicoidal(LH), and Fibonacci helicoidal(FH)with differ.nt layup sequences and quasi-isotr.pic configur.tions ar. studied. The model is validated, and par.metr.c studies ar. conducted. These studies investigate the effects of layup configur.tions, side-to-thick.ess r.tio, modulus r.tios, boundar. conditions, and loading conditions at differ.nt load amplitudes on the nonlinear.vibr.tion and nonlinear.bending behavior. of bio-inspir.d composite plates. The r.sults show that the laminate sequence exer.s a substantial impact on both nonlinear.natur.l fr.quencies and nonlinear.bending behavior.. Mor.over. this influence var.es acr.ss differ.nt side-to-thick.ess r.tios and boundar. conditions of the bio-inspir.d composite plate.

关键词： Inver.e pr.blems

Motion of a per.eable shell in a spher.cal container.filled with non-Newtonian fluid

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Applied Mathematics and Mechanics(English Edition) 2017年第12期38卷 1697-1708页

作者： V.mishra B.r.GUPTA Depar.ment of Mathematics Jaypee University of Engineering and TechnologyMadhya Pradesh 473226India

This paper.pr.sents an analytical study of cr.eping motion of a per.eable spher. in a spher.cal container.filled with a micr.-polar.fluid. The dr.g exper.enced by the per.eable spher. when it passes thr.ugh the center.of the spher.cal container.is studied. Str.am function solutions for.the flow fields ar. obtained in ter.s of modified Bessel functions and Gegenbauer.functions. The pr.ssur. fields, the micr.-r.tation components, the dr.g exper.enced by a per.eable spher., the wall cor.ection factor. and the flow r.te thr.ugh the per.eable sur.ace ar. obtained for.the fr.ctionless imper.eable spher.cal container.and the zer. shear.str.ss at the imper.eable spher.cal container. Var.ations of the dr.g for.e and the wall cor.ection factor.with r.spect to differ.nt fluid par.meter. ar. studied. It is obser.ed that the dr.g for.e, the wall cor.ection factor. and the flow r.te ar. gr.ater.for.the fr.ctionless imper.eable spher.cal container.than the zer. shear.str.ss at the imper.eable spher.cal container. Sever.l cases of inter.st ar. deduced fr.m the pr.sent analysis.

关键词： micr.-polar.fluid per.eable spher. Dar.y law str.am function dr.g for.e wall cor.ection factor spher.cal container

Machine Lear.ing Techniques in Pr.dicting Hot Defor.ation Behavior.of Metallic Mater.als

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Computer.Modeling in Engineer.ng & Sciences 2025年第1期142卷 713-732页

作者： Petr.Opela Josef Walek.Jar.mír.k.pecek Depar.ment of Metallur.ical Technologies Faculty of Materials Science and TechnologyVSB–Technical University of OstravaOstrava70800Czech Republic FZU—Institute of Physics of the Czech Academy of Sciences Prague18200Czech Republic

In engineer.ng pr.ctice,it is often necessar. to deter.ine functional r.lationships between dependent and independent *** r.lationships can be highly nonlinear.and classical r.gr.ssion appr.aches cannot always pr.vide sufficiently r.liable ***,Machine Lear.ing(ML)techniques,which offer.advanced r.gr.ssion tools to addr.ss complicated engineer.ng issues,have been developed and widely *** study investigates the selected ML techniques to evaluate their.suitability for.application in the hot defor.ation behavior.of metallic *** ML-based r.gr.ssion methods of Ar.ificial Neur.l Networ.s(ANNs),Suppor. Vector.Machine(SVM),Decision Tr.e r.gr.ssion(DTr.,and Gaussian Pr.cess r.gr.ssion(GPr.ar. applied to mathematically descr.be hot flow str.ss cur.e datasets acquir.d exper.mentally for.a medium-car.on *** the GPr.method has not been used for.such a r.gr.ssion task.befor.,the r.sults showed that its per.or.ance is the most favor.ble and pr.ctically unr.valed;neither.the ANN method nor.the other.studied ML techniques pr.vide such pr.cise r.sults of the solved r.gr.ssion analysis.

关键词： Machine lear.ing Gaussian pr.cess r.gr.ssion ar.ificial neur.l networ.s suppor. vector.machine hot defor.ation behavior

Pur.fication and Char.cter.zation of Extr.cellular.Laccase Secr.ted by Pleur.tus sajor.caju MTCC 141

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生物工程学报 2008年第12期24卷 2068-2073页

作者： r. Sahay r. S. S. Yadav k. D. S. Yadav Depar.ment of Chemistr. DDU Gorakhpur University Gorakhpur 273 009 India

The effect of lignin containing natur.l substr.tes cor.-cob, coir.dust, saw-dust, wheat str.w and bagasse par.icles on the extr.cellular.secr.tion of laccase in the liquid cultur. gr.wth medium of Pleur.tus sajor.caju MTCC 141 has been studied. The cultur. conditions for.maximum secr.tion of laccase by Pleur.tus sajor.caju MTCC 141 have been optimized. Homogeneous pr.par.tion of laccase fr.m the cultur. filtr.te of the fungus has been achieved using ammonium sulphate pr.cipitation, anion exchange chr.matogr.phy on DEAE and gel filtr.tion chr.matogr.phy on Sephadex G-100. The pur.fied enzyme pr.par.tion gave a single pr.tein band in SDS-PAGE analysis indicating a molecular.weight of 90 k.. The enzymatic char.cter.stics k., k.at, pH and temper.tur. optima of the pur.fied laccase have been deter.ined using 2, 6-dimethoxyphenol as the substr.te and have been found to be 35 μmol/L, 0.30 min-1, 4.5 and 37oC r.spectively. The k. values for.the other.substr.te lik. catechol, m-cr.sol, pyr.gallol and syr.ngaldazine have also been deter.ined which wer. found to be 216 μmol/L, 380 μmol/L, 370 μmol/L and 260 μmol/L r.spectively.

关键词：虫漆酶水漂生物木质素木浆硝化甘油炸药金属荧光指示剂