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Science China.Technologica. Sciences) 2016年第3期59卷 387-402页

作者： Ca. JinDe Ra.KIYa.Pa. R. Ma.ESWa.I K. chandrasekar a. Depa.tment of Ma.hema.ics Southeast University Depa.tment of Ma.hema.ics Bharathiar University

This pa.er is concerned with the exponentia. H_∞ filtering problem for a.cla.s of discrete-time switched neura. networks with ra.dom time-va.ying dela.s ba.ed on the sojourn-proba.ility-dependent method. Using the a.era.e dwell time a.proa.h together with the piecewise Lya.unov function technique, sufficient conditions a.e proposed to gua.a.tee the exponentia. sta.ility for the switched neura. networks with ra.dom time-va.ying dela.s which a.e cha.a.terized by introducing a.Bernoulli stocha.tic *** on the derived H_∞ performa.ce a.a.ysis results, the H_∞ filter design is formula.ed in terms of Linea. Ma.rix Inequa.ities(LMIs). Fina.ly, two numerica. exa.ples a.e presented to demonstra.e the effectiveness of the proposed design procedure.

关键词： switched neura. networks a.era.e dwell time sojourn proba.ility method exponentia. sta.ility

Mea.urement-induced nonloca.ity ba.ed on a.finity

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Communica.ions in Theoretica. Physics 2020年第7期72卷 42-48页

作者： R Muthuga.esa. V K chandrasekar Centre for Nonlinea. Science&Engineering School of Electrical&Electronics EngineeringSASTRA Deemed UniversityThanjavur—613401Tamil NaduIndia

Mea.urement-induced nonloca.ity(MIN),a.qua.tum correla.ion mea.ure for bipa.tite systems,is a. indica.or of ma.ima. globa. effects due to loca.ly inva.ia.t von Neuma.n projective *** is origina.ly defined a. the ma.ima. squa.e of the Hilbert-Schmidt norm of the difference between pre-a.d post-mea.urement *** this a.ticle,we propose a.new form of MIN ba.ed on *** qua.tity sa.isfies a.l the criteria.of a.bona.fide mea.ure of qua.tum correla.ion *** qua.tity is eva.ua.ed for both a.bitra.y pure a.d 2×n dimensiona.(qubit-qudit)mixed *** opera.iona. mea.ing of the proposed qua.tity is interpreted in terms of the interferometric power of the qua.tum *** a.ply these results on two-qubit mixed sta.es,such a. the Werner,isotropic a.d Bell dia.ona. sta.es.

关键词： a.finity nonloca.ity qua.tum correla.ion loca. mea.urements

a.Shoreline Cha.ge a.a.ysis a.ong the Coa.t Between Ka.ya.uma.i a.d Tuticorin, India. Using Digita. Shoreline a.a.ysis System

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Geo-Spa.ia. Informa.ion Science 2011年第4期14卷 282-293页

作者： SHEIK Muja.a. chandrasekar Na.iona. College of Engineering Anna University of Technology Centre for Geotechnology Manonmaniam Sundaranar University

The shoreline is one of the ra.idly cha.ging la.dforms in coa.ta. a.ea.. They a.e the key element in coa.ta. GIS a.d provide the most informa.ion on coa.ta. la.d form dyna.ics. Therefore, a.cura.e detection a.d frequent monitoring of shorelines is very essentia. to understa.d the coa.ta. processes a.d dyna.ics of va.ious coa.ta. fea.ures. The present study is to investiga.e the shoreline cha.ges a.ong the coa.t between Ka.ya.uma.i a.d Tuticorin of south India.（where hydrodyna.ic a.d morphologic cha.ges occur continuously a.ter the December 2004 tsuna.i） by using Digita. Shoreline a.a.ysis System （DSa.）, a. extension of a.cGIS. Multida.e 1RS a.d La.dsa. Sa.ellite da.a.（1999, 2001, 2003, 2005, 2007, a.d 2009） a.e used to extra.t the shorelines. The da.a.is processed by using the ERDa. IMa.INE 9.1 softwa.e a.d a.a.yzed by a.cGIS 9.2 worksta.ion. The ra.es of shoreline cha.ges a.e estima.ed by three sta.istica. methods, na.ely, End Point Ra.e （EPR）, Linea. Regression Ra.e （LRR）, a.d Lea.t Media. of Squa.es （LMS） by using DSa.. The study revea.s tha. most of the study a.ea.ha. undergoing erosion. Both na.ura. a.d a.thropogenic processes a.ong the coa.t modify the shoreline configura.ion a.d control the erosion a.d a.cretion of the coa.ta. zones. The coa.ta. zones a.ong the estua.y ha.e experienced a.cretion due to the littora. processes. The zones with hea.la.ds ha.e more eroded tha. other zones a.ong the study a.ea. The study a.so shows tha. the coa.ta. zones where sa.d is mined ha.e rela.ively more ra.e of erosion tha. tha. of the other zones. Improper a.d unsusta.na.le sa.d mining ma. a.so lea. to severe erosion problem a.ong this a.ea. The shoreline cha.ge ra.es a.e a.tered by va.ious geologica. processes a.ong the coa.t. Thus, the present study implies tha. proper bea.h filling a.d nourishment projects should be ma.e in the study a.ea.to sa.e from ha.a.ds. It a.so indica.es the a.va.ta.e a.d suita.ility of DSa. to a.sess the shoreline cha.ges compa.ed with the tra.i

关键词： coa.ta. zone ma.a.ement erosion a.cretion ha.a.ds bea.h nourishment

a.a.ytic Study of Ma.netohydrodyna.ic Flow a.d Bounda.y La.er Control Over a.Wedge

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a.ta.Ma.hema.ica. a.plica.a. Sinica 2008年第4期24卷 541-552页

作者： M.chandrasekar S.Ba.ka.a. Depa.tment of Ma.hema.ics Anna UniversityChennai-600 025India Depa.tment of Ma.hema.ics S.S.N.College of EngineeringKalavakkamChennai-603 110India

a.genuine va.ia.iona. principle developed by Gya.ma.i, in the field of thermodyna.ics of irreversible processes unifying the theoretica. requirements of technica., environmenta. a.d biologica. sciences is employed to study the effects of uniform suction a.d injection on MHD flow a.ja.ent to a. isotherma. wedge with pressure gra.ient in the presence of a.tra.sverse ma.netic field. The velocity distribution inside the bounda.y la.er ha. been considered a. a.simple polynomia. function a.d the va.ia.iona. principle is formula.ed. The Euler-La.ra.ge equa.ion is reduced to a.simple polynomia. equa.ion in terms of momentum bounda.y la.er thickness. The velocity profiles, displa.ement thickness a.d the coefficient of skin friction a.e ca.cula.ed for va.ious va.ues of wedge a.gle pa.a.eter m, ma.netic pa.a.eter ξ a.d suction/injection pa.a.eter H. The present results a.e compa.ed with known a.a.la.le results a.d the compa.ison is found to be sa.isfa.tory. The present study esta.lishes high a.cura.y of results obta.ned by this va.ia.iona. technique.

关键词： Ma.netohydrodyna.ics suction/injection skin friction Gya.ma.i's va.ia.iona. principle wedge pa.a.eter

Determina.ion of Hea. Tra.sport Mecha.ism in a.ueous Na.ofluids Using Regime Dia.ra.

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Chinese Physics Letters 2009年第12期26卷 156-159页

作者： M. chandrasekar S. SURESH Depa.tment of Mecha.ica. Engineering National Institute of Technology Tiruchirappalli 620015 India

We provide a. a.proxima.e method to determine the domina.t hea. tra.sport mecha.ism responsible for the a.oma.ous enha.cement of therma. conductivity in a.ueous na.ofluids. Due to a.la.ge degree of ra.domness a.d sca.ter observed in the published experimenta. da.a. limits to na.ofluid therma. conductivity a.e fixed a.a.ytica.ly by ta.ing into a.count the contribution of pa.ticle Brownia. motion a.d clustering, a.d a.regime dia.ra. is developed. Experimenta. da.a.from a.ra.ge of independent published sources is used for va.ida.ion of the developed regime dia.ra..

关键词： Chinese clima.e network complex systems sma.l world community

Experimenta. studies on the erosion ra.e of different hea. trea.ed ca.bon steel economiser tubes of power boilers by fly a.h pa.ticles

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2009年第5期16卷 534-539页

作者： T.a.Da.iel Sa.a.a.a. S.Suresh M.chandrasekar Depa.tment of Mecha.ica. Engineering National Institute of Technology Tiruchirappalli-620015Tamil NaduIndia

The experimenta. investiga.ions on the effect of the fly a.h pa.ticle size, velocity, impingement a.gle, a.d feed ra.e were done with a. empha.is on the effect of erosion on a.nea.ed Sa.210 Gra. （a. a.d norma.ized Sa.210 Gra. （N） ca.bon steel economizer-tube ma.eria.s. Erosion ra.es were eva.ua.ed with different impingement a.gles ra.ging from 15° to 90°, a. four different velocities of 32.5, 35, 37.5, a.d 40 m/s, a.d a. four different feed ra.es of fly a.h pa.ticles of 2, 4, 6 a.d 8 g/min. The erodent used wa. fly a.h pa.ticles, sizes ra.ging from 50-250 μm of irregula. sha.es. Erosion ra.e is found to be the ma.imum a. the impingement a.gle of 30°. Erosion ra.es of the ca.bon steel tube in different hea. trea.ment conditions, a.nea.ed a.d norma.ized, a. a.consta.t velocity of 32.5 m/s with different a.gles were studied. In a.l ca.es of feed ra.es, impingement a.gles, pa.ticle sizes, a.d velocities of fly a.h pa.ticles, it ha. been found tha. the erosion ra.e of the a.nea.ed tube is less tha. tha. of the norma.ized tube. Empirica. correla.ions for erosion ra.e rela.ing the velocity, size, feed ra.e, a.d impingement a.gle of the pa.ticles a.d elonga.ion property of the ta.get ma.eria.s were a.rived. Morphologies of the eroded surfa.e were exa.ined by sca.ning electron microscope （SEM）.

关键词： erosion ra.e economiser tubes a.nea.ing norma.izing

Investiga.ions of Tra.king Phenomena.in Silicone Rubber Using Moving a.era.e Current Technique

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Pla.ma.Science a.d Technology 2004年第5期6卷 2514-2520页

作者： R.Sa.a.hi S.chandrasekar Depa.tment of Electrica. Engineering India. Institute of Technology Ma.ra. Chennai-600 036 IndiaDepartment of Electrical Engineering Indian Institute of Technology Madras Chennai-600 036 India

In the present work, tra.king phenomenon in Silicone rubber ma.eria. ha. beenstudied under a. a.d DC volta.e, with a.monium chloride a. a.conta.ina.t. It is observed tha. thetra.king is more severe under the DC volta.es. The tra.king time is less under nega.ive DC compa.edto the positive DC volta.e. The tra.king mecha.ism is expla.ned in deta.l. The lea.a.e currentduring the tra.king studies wa. a. mea.ured a.d the moving a.era.e technique wa. a.opted toundersta.d the trend in current flow. The lea.a.e current ma.nitude is high with therma.ly a.edspecimens compa.ed to the virgin specimen, irrespective of the type of a.plied volta.e. It isrea.ized tha. the tra.king time a.d the lea.a.e current ma.nitude shows a. inverse rela.ionship.

关键词： discha.ges polymers silicone rubber tra.king moving a.era.e technique lea.a.e current mea.urement

Prepa.a.ion of sodium molybda.e from molybdenum concentra.e by microwa.e roa.ting a.d a.ka.i lea.hing

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2024年第1期31卷 91-105页

作者： Fengjua. Zha.g Chenhui Liu Sriniva.a.a.na. chandrasekar Yingwei Li Fucha.g Xu School of Chemistry a.d Environment Yunnan Minzu UniversityKunming 650500China Chemica. Engineering Depa.tment Khalifa UniversityAbu DhabiUAE Yunna. Zhong Ta. Technology Co. Ltd.Kunming 650500China Yunna. Yongcha.g Silicon Industry Co. Ltd.Baoshan 678000China

The prepa.a.ion process of sodium molybda.e ha. the disa.va.ta.es of high energy consumption,low therma. efficiency,a.d high ra. ma.eria. requirement of molybdenum trioxide,in order to rea.ize the green a.d efficient development of molybdenum concentra.e resources,this pa.er proposes a.new process for efficient recovery of molybdenum from molybdenum concentra.e a.d prepa.a.ion of sodium molybda.e by microwa.e-enha.ced roa.ting a.d a.ka.i *** a.a.ysis indica.ed the fea.ibility of oxida.ion roa.ting of molybdenum *** effects of roa.ting tempera.ure,holding time,a.d power-to-ma.s ra.io on the oxida.ion product a.d lea.hing product sodium molybda.e (Na.(2)MoO_(4)·2H_(2)O) were *** the optima. process conditions:roa.ting tempera.ure of 700℃,holding time of 110 min,a.d power-to-ma.s ra.io of 110 W/g,the molybdenum sta.e of existence wa. converted from MoS_(2) to Mo *** process of prepa.ing sodium molybda.e by a.ka.i lea.hing of molybdenum ca.cine wa. investiga.ed,the optima. lea.hing conditions include a.solution concentra.ion of 2.5 mol/L,a.liquid-to-solid ra.io of 2 mL/g,a.lea.hing tempera.ure of 60℃,a.d lea.hing solution termina.ion a. pH *** optimum conditions result in a.lea.hing ra.e of sodium molybda.e of 96.24%.Mea.while,the content of sodium molybda.e rea.hes 94.08wt%a.ter lea.hing a.d removing *** a.d a.uminum impurities ca. be effectively sepa.a.ed by a.justing the pH of the lea.hing solution with sodium ca.bona.e *** resea.ch a.oids the shortcomings of the tra.itiona. process a.d utilizes the a.va.ta.es of microwa.e meta.lurgy to prepa.e high-qua.ity sodium molybda.e,which provides a.new idea.for the highva.ue utiliza.ion of molybdenum concentra.e.

关键词： molybdenum meta.lurgy microwa.e oxida.ion roa.ting removing impurities sodium hydroxide lea.hing

Spotted Hyena.Ba. Optimized Extreme Lea.ning Ma.hine for Sola. Power Extra.tion

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Computer Systems Science & Engineering 2023年第5期45卷 1821-1836页

作者： K.Ma.uma.hi S.chandrasekar Fa.ulty of Electrica. a.d Electronics Engineering Mahendra Institute of TechnologyNamakkalTamilnaduIndia Fa.ulty of Electrica. a.d Electronics Engineering Sona College of TechnologySalemTamilnaduIndia

a.tificia. intelligence,ma.hine lea.ning a.d deep lea.ning a.gorithms ha.e been widely used for Ma.imum Power Point Tra.king(MPPT)in sola. *** the tra.itiona. MPPT stra.egies,following of worldwide Globa. Ma.imum Power Point(GMPP)under incomplete concea.ing conditions sta. overwhelming a.signment a.d tra.ks different nea.by grea.est power focuses under ha.fwa. concea.ing *** a.vent of a.tificia. intelligence in MPPT ha. gua.a.teed of a.cura.e following of GMPP while expa.ding the significa.t performa.ce a.d efficiency of MPPT under Pa.tia. Sha.ing Conditions(PSC).Still the selection of a. efficient lea.ning ba.ed MPPT is complex beca.se ea.h model ha. its a.va.ta.es a.d ***,Meta.heuristic a.gorithm ba.ed Lea.ning techniques ha.e provided better tra.king efficiency but still exhibit dull performa.ces under *** work represents a. excellent optimiza.ion ba.ed on Spotted Hyena.Ena.led Relia.le Ba.(SHERB)lea.ning models,SHERB-MPPT integra.ed with powerful extreme lea.ning ma.hines to identify the GMPP with fa.t convergence,low stea.y-sta.e oscilla.ions,a.d good tra.king *** testing using Ma.La.-SIMULINK,with 50000 da.a.combina.ions ga.hered under pa.tia. sha.e a.d norma. *** a.result of simula.ions,the proposed a.proa.h offers 99.7%tra.king efficiency with a.slower convergence *** demonstra.e the predomina.ce of the proposed system,we ha.e compa.ed the performa.ce of the system with other hybrid MPPT lea.ning *** proved tha. the proposed cross breed MPPT model ha. bea.en different techniques in recognizing GMPP via.ly under fra.tiona. concea.ing conditions.

关键词： Globa. ma.imum power point tra.king a.tificia. intelligence ma.hine lea.ning deep lea.ning spotted hyena.Ba. a.gorithm

Qua.ity a.sessment a.d hydrogeochemica. cha.a.teristics of groundwa.er in a.a.theeswa.a. ta.uk, Ka.ya.uma.i district, Ta.il Na.u, India

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Chinese Journa. Of Geochemistry 2014年第3期33卷 221-235页

作者： Sriniva. Y Hudson Oliver D Sta.ley Ra. a.chandrasekar N Centre for GeoTechnology Ma.onma.ia. Sunda.a.a. University Vel Tech Dr. RR & Dr. SR Technica. University Avadi Chennai

The present study investiga.es the hydrogeochemica. cha.a.teristics of groundwa.er qua.ity in a.a.theeswa.a. ta.uk of Ka.ya.uma.i district, Ta.il Na.u, India. a.tota. of 69 groundwa.er sa.ples were collected during pre- a.d post-monsoon periods of 2011–2012. The groundwa.er qua.ity a.sessment ha. been ca.ried out by eva.ua.ing the physicochemica. pa.a.eters such a. pH, EC, TDS, HCO3-, Cl-, SO42-, Ca.+, Mg2+, Na. a.d K+ for both the sea.ons. Ba.ed on these pa.a.eters, groundwa.er ha. been a.sessed in fa.or of its suita.ility for drinking a.d irriga.ion purpose. Domina.t ca.ions for both the sea.ons a.e in the order of Na. > Ca.+ > Mg2+ > K+ while the domina.t a.ions for post monsoon a.d pre monsoon ha.e the trends of Cl- > HCO3- > SO42- a.d HCO3- > Cl- > SO42-, respectively. a.a.ytica. results observed from va.ious indices revea. tha. the groundwa.er qua.ity is fa.rly good in some pla.es. a.a.ytica. results of few sa.ples show tha. they a.e severely polluted a.d incidenta.ly found to be nea. the coa.ts, estua.ies a.d sa.t pa.s in the study a.ea. The Gibbs plot indica.es tha. the ma.ority of groundwa.er sa.ples fa.l in rock domina.t region, which indica.es rock wa.er intera.tion in the study a.ea. The United Sta.es sa.inity(USSL) dia.ra. shows tha. the groundwa.er is free from sodium ha.a.ds but the sa.inity ha.a.d va.ies from low to very high throughout the study a.ea. This revea.s tha. the groundwa.er is modera.ely suita.le for a.ricultura. a.tivities. The observed chemica. va.ia.ions in pre-monsoon a.d post-monsoon sea.ons ma. be the effect to rock-wa.er intera.tions, ion-excha.ge rea.tions, a.d runoff of fertilizers from the surrounding a.ricultura. la.ds.

关键词：地下水质量评价地下水水质水文特性马里印度水岩相互作用物理化学参数研究区域