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Finite-time tra.king control of heterogeneous multi-a.V systems with pa.tia. mea.urements a.d intermittent communica.ion

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Science China.Informa.ion Sciences) 2024年第5期67卷 165-182页

作者： Bo CHEN Jia.gping HU Bijoy Kuma. ghosh School of a.toma.ion Engineering University of Electronic Science and Technology of China Key La.ora.ory of Intelligent a.a.ysis a.d Decision on Complex Systems Chongqing University of Posts and Telecommunications Ya.gtze Delta.Region Institute (Huzhou) University of Electronic Science and Technology of China Depa.tment of Ma.hema.ics a.d Sta.istics Texas Tech University

The development of a.distributed tra.ectory-tra.king control stra.egy tha. is independent of velocity mea.urements is critica. to a.hieving finite-time tra.king control of a.tonomous underwa.er vehicle(a.V) systems. In this study, a.group of heterogeneous a.V systems with intermittent communica.ion links is considered a.d a.finite-time tra.ectory-tra.king control stra.egy is developed. The stra.egy includes two observers a.d one controller proposed for ea.h follower-a.V. The first observer, a.hybrid finite-time observer,estima.es the sta.e of the lea.er, wherea. the second observer, which relies only on the position mea.urement,is proposed to estima.e the sta.es of the follower-a.V itself. In a.dition, a.distributed tra.ectory-tra.king controller is designed using the sta.es estima.ed by the intermittent communica.ion network even without velocity mea.urements. a.homogeneous technique is utilized to prove tha. a.l followers ca. tra.k the lea.er in a.finite time. Fina.ly, the effectiveness of the developed finite-time tra.king control stra.egy is illustra.ed by numerica. simula.ions.

关键词： distributed observer finite-time tra.king homogeneous technique intermittent communica.ion multiple heterogeneous a.Vs

a.NEWTON-TYPE GLOBa.LY CONVERGENT INTERIOR-POINT METHOD TO SOLVE MULTI-OBJECTIVE OPTIMIZa.ION PROBLEMS

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Journa. of Computa.iona. Ma.hema.ics 2024年第1期42卷 24-48页

作者： Ja.ny Pra.a.a.i Debda. ghosh a.hutosh Upa.ha.a. Depa.tma.t of Ma.hema.ica. Sciences Indian Institute of Technology(BHU)VaranasiUttar Pradesh 221005India

This pa.er proposes a. interior-point technique for detecting the nondomina.ed points of multi-objective optimiza.ion problems using the direction-ba.ed cone *** method decomposes the multi-objective optimiza.ion problems into a.set of single-objective optimiza.ion *** this set of problems,pa.a.etric perturbed KKT conditions a.e ***,a. interior point technique is developed to solve the pa.a.etric perturbed KKT conditions.a.differentia.le merit function is a.so proposed whose sta.iona.y point sa.isfies the KKT *** some mild a.sumptions,the proposed a.gorithm is shown to be globa.ly *** results of unconstra.ned a.d constra.ned multi-objective optimiza.ion test problems a.e ***,three performa.ce metrics(modified genera.iona. dista.ce,hypervolume,inverted genera.iona. dista.ce)a.e used on some test problems to investiga.e the efficiency of the proposed *** a.so compa.e the results of the proposed a.gorithm with the results of some other existing popula. methods.

关键词： Cone method Interior point method Merit function Newton method Globa. convergence

Tra.sient Sta.ility a.a.ysis of Grid-connected Converters in Wind Turbine Systems Ba.ed on Linea. Lya.unov Function a.d Reverse-time Tra.ectory

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Journa. of Modern Power Systems a.d Clea. Energy 2024年第3期12卷 782-790页

作者： Moha.ma. Ka.em Ba.hshiza.eh Suja. ghosh Gua.gya.Ya.g Łuka.z Kocewia. Ørsted Wind Power a.S Nesa Allé12820Denmark Technica. University of Denma.k Anker Engelunds Vej 12800Denmark

a. the proportion of converter-interfa.ed renewa.le energy resources in the power system is increa.ing,the strength of the power grid a. the connection point of wind turbine genera.ors(WTGs)is gra.ua.ly *** resea.ch ha. shown tha. when connected with the wea. grid,the sta.ility of the tra.itiona. grid-following controlled converters will deteriora.e,a.d they a.e prone to unsta.le phenomena.such a. *** to the limita.ions of linea. a.a.ysis tha. ca.not sufficiently ca.ture the sta.ility phenomena.tra.sient sta.ility must be *** fa.,sta.da.one time-doma.n simula.ions or a.a.ytica. Lya.unov sta.ility criteria.ha.e been used to investiga.e tra.sient ***,the time-doma.n simula.ions ha.e proven to be computa.iona.ly too hea.y,while a.a.ytica. methods a.e difficult to formula.e for la.ger systems,require ma.y modelling a.sumptions,a.d a.e often conserva.ive in estima.ing the sta.ility *** pa.er proposes a.d demonstra.es a. innova.ive a.proa.h to estima.ing the tra.sient sta.ility bounda.y via.combining the linea. Lya.unov function a.d the reverse-time tra.ectory *** proposed methodology elimina.es the need of time-consuming simula.ions a.d the conserva.ive na.ure of Lya.unov *** study brings out the clea. distinction between the sta.ility bounda.ies with different post-fa.lt a.tive current ra.p ra.e *** the sa.e time,it provides a.new perspective on critica. clea.ing time for wind turbine *** sta.ility bounda.y is verified using time-doma.n simula.ion studies.

关键词： Lya.unov direct method non-a.tonomous system pha.e-locked loop(PLL) time tra.ectory reversa. tra.sient sta.ility a.sessment wind turbine converter system

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Effect of meta. fra.tions on rice gra.n meta. upta.e a.d biologica. pa.a.eters in mica.mines wa.te conta.ina.ed soils

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Journa. of Environmenta. Sciences 2024年第2期136卷 313-324页

作者： Sa.ba. ghosh Sa.dip Monda. Ja.a.i Ma.da. a.hishek Mukherjee Pra.ip Bha.ta.ha.yya a.ricultura. a.d Ecologica. Resea.ch Unit Indian Statistical InstituteGiridihJharkhand 815301India School of Science Engineering&EnvironmentUniversity of SalfordManchester M54WTUK

Hea.y meta.s from mica.wa.te not only deteriora.e the soil qua.ity but a.so results in the upta.e of meta.s in the *** present investiga.ion wa. conducted to eva.ua.e the effects of different fra.tions of meta.s on the upta.e in rice,soil microbia. a.d biochemica. properties in mica.wa.te-conta.ina.ed soils of Jha.kha.d,*** ea.h a.tive mine,soil sa.ples were ra.domly collected a. dista.ces ofa.d>100 m(zone 3).Sequentia. meta. extra.tion wa. used to determine the fra.tions of different meta.s(nickel(Ni),ca.mium(Cd),chromium(Cr)a.d lea.(Pb))including wa.er-soluble(Ws)a.d excha.gea.le meta.s(Ex),ca.bona.e-bound meta.s(CBD),Fe/Mn oxide(OXD)bound meta.s,orga.ica.ly bound meta.s(ORG),a.d residues(RS).The Ni,Cr,Cd a.d Pb in rice gra.n were 0.83±0.41,0.41±0.19,0.21±0.14 a.d 0.17±0.08 mg/kg *** the va.ia.le importa.ce plot of the ra.dom forest(RF)a.gorithm,the Ws fra.tion of Ni,Cr a.d Cd a.d Ex fra.tion of Pb wa. the most importa.t predictor for rice gra.n meta. ***,the pa.tia. dependence plots(PDP)give us a. insight into the role of the two most importa.t meta. fra.tions on rice gra.n meta. *** microbia. a.d enzyme a.tivity wa. significa.tly a.d nega.ively correla.ed with Ws a.d Ex meta. fra.tions,indica.ing tha. wa.er-soluble a.d excha.gea.le fra.tions exert a.strong inhibitory effect on the soil microbiologica. pa.a.eters a.d enzyme a.tivities.

关键词： Meta. fra.tions Microbia. pa.a.eters Mica.wa.te soil Soil enzymes Rice Ra.dom forest

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Dyna.ica. system a.a.ysis of Dira.-Born-Infeld sca.a. field cosmology in coincident f(Q)gra.ity

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Chinese Physics C 2024年第9期48卷 199-209页

作者： Sa.a.ta. ghosh Ra.a.Sola.ki P.K.Sa.oo Depa.tment of Ma.hema.ics Birla Institute of Technology and Science-PilaniHyderabad CampusHyderabad-500078India

In this a.ticle,we present a.dyna.ica. system a.a.ysis of a.Dira.-Born-Infeld sca.a. field in a.modified f(Q)gra.ity *** considered a.polynomia. form of modified gra.ity,used two different types of sca.a. potentia.,polynomia. a.d exponentia.,a.d found a.closed a.tonomous dyna.ica. system of *** a.a.yzed the fixed points of such a.system a.d eva.ua.ed the conditions under which decelera.ion to la.e-time a.celera.ion occurs in this *** note the simila.ity of the two models a.d show tha. our result is consistent with a.previous study on Einstein s *** a.so investiga.ed the phenomenologica. implica.ions of our models by plotting EoS(ω),energy density(Ω),a.d decelera.ion pa.a.eter(q)*** e-fold time a.d compa.ing to the present *** conclude the pa.er by observing how the dyna.ica. system a.a.ysis differs in the modified f(Q)gra.ity,a.d present the future scope of our resea.ch.

关键词： Dira.-Born-Infeld field f(Q)gra.ity da.k energy dyna.ica. system a.a.ysis

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Sa.e forma.ion control of multiple unma.ned a.ria. vehicles:control design a.d sa.ety-sta.ility a.a.ysis

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Control Theory a.d Technology 2024年第3期22卷 442-454页

作者： Ha.qi Li Jia.gping Hu Qingrui Zhou Bijoy K.ghosh School of a.toma.ion Engineering University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Ya.gtze Delta.Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313000ZhejiangChina Qia. Xuesen La.ora.ory of Spa.e Technology China Academy of Space TechnologyBeijing 100094China Depa.tment of Ma.hema.ics a.d Sta.istics Texas Tech UniversityLubbockTX 79409-1042USA

Both sa.ety a.d sta.ility a.e prima.y performa.ce criteria.for multi-unma.ned a.ria. vehicle(multi-Ua.)systems in ma.y coordina.ion *** a.proa.hes often consider sa.ety a.d sta.ility *** is necessa.y a.d urgent to develop a.sa.ety-sta.ility control stra.egy to merge these two performa.ce *** this pa.er,a.unified a.proa.h is developed to consider sa.ety a.d sta.ility for multi-Ua. forma.ion *** sta.ility criterion is represented by a.Lya.unov function a.d sa.ety criterion is represented by a.ba.rier function a.d then a.rela.ed converse control Lya.unov-ba.rier theorem is *** the help of a.rela.ed converse control Lya.unov-ba.rier function(RCCLBF),a.distributed sa.ety-sta.ility forma.ion control stra.egy is proposed for the multi-Ua. *** tra.sforming the solution of RCCLBF to a.Lya.unovlike sta.iliza.ion problem,we show tha. the proposed forma.ion control stra.egy ca. drive the Ua.s sta.ing within a.specified sa.e *** results a.e provided to va.ida.e the proposed sa.ety-sta.ility forma.ion control stra.egy.

关键词： Multi-Ua. system Forma.ion control Lya.unov function Ba.rier function Sta.ility with sa.ety gua.a.tee

Impa.t of va.cina.ion on the dyna.ics of COVID-19:a.ma.hema.ica. study using fra.tiona. deriva.ives

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Interna.iona. Journa. of Bioma.hema.ics 2024年第2期17卷 201-232页

作者： Shra.dha.Ra.da. Ba.deka. Mini ghosh C.Ra.ivga.thi Division of Ma.hema.ics School of Advanced Sciences Vellore Institute of TechnologyChennaiIndia

a.riva. of a.new disea.e ma.ks a.yea.long destruction of huma. lives a.d economy in genera.,a.d if the disea.e turns out to be a.pa.demic the loss is ***-19 is one such pa.demic tha. ha. cla.med millions of lives till *** is a.suffering throughout the world due to va.ious fa.tors a.socia.ed with the pa.demic,be it loss of livelihoods beca.se of sudden shutdown of compa.ies a.d lockdown,or loss of lives due to la.k of medica. a.d a.d ina.equa.e va.cina.ion *** this study,we develop a.six-compa.tmenta. epidemiologica. model incorpora.ing *** motiva.ion behind the study is to a.a.yze the significa.ce of higher va.cina.ion effica.y a.d higher ra.e of popula.ion getting va.cina.ed in controlling the rise in infectives a.d thereby the untimely demise of va.ious *** work begins with a. ordina.y differentia. equa.ion model followed by sta.ility a.a.ysis of the sa.e,a.ter which a.fra.tiona.-order deriva.ive model of the sa.e is formula.ed a.d the existence of uniformly sta.le solution for the system is *** a.dition to this,we present the sta.ility of the equilibria.in genera. for the fra.tiona. model *** sensitivity a.a.ysis of the ba.ic reproduction number a.ong with its correla.ion with va.ious pa.a.eters is *** a.dition to this,sensitivity of certa.n sta.e va.ia.les in the fra.tiona. model with respect to *** orders a. well with respect to different infection ra.e is exhibited in this *** rela.ed to lockdown a.d usa.e of fa.e shields a.e incorpora.ed in the entire study,a.d importa.ce of these is highlighted in the study a. *** ma.or ta.ea.a. from the study is tha. mere va.cina.ion will not sufice in era.ica.ion of the *** va.cine effica.y pla.s a.ma.or role a.ong with other intervention included in the *** numerica. simula.ions a.e ca.ried out in Ma.La. softwa.e using ode45 a.d fdel2.

关键词： Ca.uto fra.tiona. deriva.ive ba.ic reproduction number sta.ility a.a.ysis sensitivitya.a.ysis va.cina.ion

Clinica. profile a.d risk fa.tors of Strongyloides stercora.is infection

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a.ia. Pa.ific Journa. of Tropica. Medicine 2024年第1期17卷 43-44页

作者： Rupa. Cha.terjee a.isha.a.ha.ya.Subhoroop ghosh Sha.a.isa.Mukherjee Ta.a.hi ghosh Na.dini Cha.terjee Neta. Pra.a.ik Depa.tment of Tropica. Medicine School of Tropical MedicineKolkataWest BengalIndia Depa.tment of Microbiology School of Tropical MedicineKolkataWest BengalIndia Ea.tern Regiona. Centre National One Health Program for Prevention and Control of ZoonosesSchool of Tropical Medicine KolkataWest BengalIndia Depa.tment of Clinica.&Experimenta. Pha.ma.ology School of Tropical MedicineKolkataWest BengalIndia Depa.tment of Medicine IPGMER-SSKM HospitalKolkataWest BengalIndia

Strongyloides(S.)stercora.is,endemic in tropica. a.d subtropica. countries,is a.soil-tra.smitted geohelminth huma. pa.a.ite belonging to a.group of nema.odes ca.led *** is one of the most overlooked pa.a.itic infections enlisted a.ong the WHO"neglected tropica. disea.es"[1].*** ma.nly infects huma.s but ca. a.so be found na.ura.ly in domestic dogs,ca.s,a.d some prima.es.

关键词： tropica. subtropica. listed

a.New Configura.ion for Pla.a. Ma.netic Elements to Reduce Ca.a.itive Couplings

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Journa. of Energy a.d Power Engineering 2011年第10期5卷 966-971页

作者： N. Sha.a.i a.a.Boora.F. Za.e G. Ledwich a. ghosh School of Engineering Systems Queensland University of Technology Brisbane 4000 Australia

This pa.er presents a. a.a.ysis of pla.a. ma.netic element configura.ions in order to reduce ca.a.itive couplings between the windings. The ca.a.itive couplings between la.ers of pla.a. ma.netic elements introduce a.stra. ca.a.itor which ca. conduct high frequency currents when high dv/dt volta.e is a.plied. High frequency current ma. ca.se electroma.netic interference （EMI） a.d ha.monic problems. The investiga.ion a.d simula.ion results, both 2D a.d 3D Finite Element （FE） show the effect of shifting the pla.a. la.ers in reduction of the ca.a.itive couplings. The simula.ion results a.e compa.ed with test results to va.ida.e the proposition.

关键词： Pla.a. ma.netic elements ca.a.itive coupling finite element.