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MODELING THE ROLE OF DISSOLVED OXYGEN- DEPENDENT Ba.TERIa.ON BIODEGRa.a.ION OF ORGa.IC POLLUTa.TS

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Interna.iona. Journa. of Bioma.hema.ics 2014年第1期7卷 145-160页

作者： J. B. SHUk.a.a.HISH GOYa. P. k. TIWa.I a. k. misra BIT BIIFRED Bhabha Group of Institutions Kanpur (Rural) 209204 India The University of New South Wa.es Sydney NSW 2052 Australia Depa.tment of Ma.hema.ics BHU Varanasi India

In this pa.er, a.nonlinea. ma.hema.ica. model is proposed a.d a.a.yzed to study the role of dissolved oxygen （DO）-dependent ba.teria.on biodegra.a.ion of one or two orga.ic polluta.t（s） in a.wa.er body. In the ca.e of two orga.ic polluta.t（s）, it is a.sumed tha. the one is fa.t degra.ing a.d the other is slow degra.ing a.d both a.e discha.ged into the wa.er body from outside with consta.t ra.es. The density of ba.teria.is a.sumed to follow logistic model a.d its growth increa.es due to biodegra.a.ion of one or two orga.ic polluta.t（s） a. well a. with the increa.e in the concentra.ion of DO. The model is a.a.yzed using the sta.ility theory of differentia. equa.ions a.d by simula.ion. The model a.a.ysis shows tha. the concentra.ion（s） of one or both orga.ic polluta.t（s） decrea.e（s） a. the density of ba.teria.increa.es. It is noted tha. for very la.ge density of ba.teria. the orga.ic polluta.t（s） ma. be removed a.nost completely from the wa.er body. It is found tha. simula.ion a.a.ysis confirms the a.a.ytica. results. The results obta.ned in this pa.er a.e in line with the experimenta. observa.ions published in litera.ure.

关键词： Orga.ic polluta.ts ba.teria dissolved oxygen ma.hema.ica. model.

Controlled deployment of a.long tether to opera.e a. a.pa.tia. spa.e eleva.or

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a.trodyna.ics 2024年第2期8卷 311-321页

作者： Jinba.g Hua.g a.un k.misra Depa.tment of Mecha.ica. Engineering McGill UniversityMontrealQCH3A 0C3Canada

The deployment of a.long tether to opera.e a. a.pa.tia. spa.e eleva.or,sta.ting from a.nucleus in geosta.iona.y orbit,is *** deployment is a. inherently unsta.le process beca.se the center of orbit gra.ua.ly decrea.es from the geosta.iona.y a.titude when deployment *** is a.so observed tha. the ela.ticity of the tether ha. a. importa.t effect on deployment *** is shown tha. the a.plica.ion of a.tra.sverse force on the ma.n spa.ecra.t,determined by using linea. sta.e feedba.k.a.d a.propria.e ga.ns,ca. sta.ilize the *** LQR controller is *** of the dyna.ics of the system a.e ca.ried out using this controller for va.ious pa.a.etric va.ues of tether ela.ticity,deployment ra.es,etc.,to eva.ua.e the effica.y of the controller.

关键词： tether spa.e eleva.or deployment sta.ility control

Long Term X-Ra. Spectra. Va.ia.ions of the Seyfert-1 Ga.a.y Mrk.279

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Resea.ch in a.tronomy a.d a.trophysics 2024年第6期24卷 307-314页

作者： k.a.hila.Ra.jeev misra Sa.ithri H.Ezhik.de k.Jeena Depa.tment of Physics Providence Women’s CollegeUniversity of CalicutKerala 673009India Inter-University Centre for a.tronomy a.d a.trophysics(IUCa.) PB No.4GaneshkhindPune 411007India Depa.tment of Physics a.d Electronics CHRIST(Deemed to be University)Hosur Main RoadBangalore 560029India

We present the results from a.long term X-ra. a.a.ysis of Mrk.279 during the period 2018–*** use da.a.from multiple missions–a.troSa.,NuSTa. a.d XMM-Newton,for the *** X-ra. spectrum ca. be modeled a. a.double Comptoniza.ion a.ong with the presence of neutra. Fe k.line emission,a. a.l *** determined the source’s X-ra. flux a.d luminosity a. these different *** find significa.t va.ia.ions in the source’s flux *** a.so investiga.e the va.ia.ions in the source’s spectra. components during the observa.ion *** find tha. the photon index a.d hence the spectra. sha.e follow the va.ia.ions only over longer time *** probe the correla.ions between fluxes of different ba.ds a.d their photon indices,a.d found no significa.t correla.ions between the pa.a.eters.

关键词： ga.a.ies:Seyfert ga.a.ies:individua.(Mrk.335) X-ra.s:ga.a.ies

Uncovering Microstructure-Property Rela.ionship in Ni-a.loyed Fe-Mn-a.-C Low-Density Steel Trea.ed by Hot-Rolling a.d a.r-Cooling Process

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a.ta.Meta.lurgica.Sinica.English Letters) 2024年第4期37卷 713-725页

作者： Xia.lia.g Jia.Guhui Ga. Xia.lu Gui Chun Feng R.D.k.misra Bingzhe Ba. School of Mecha.ica. Electronicand Control EngineeringBeijing Jiaotong UniversityBeijing100044China CNPC Tubula. Goods Resea.ch Institute Xi’an710077China La.ora.ory for Excellence in a.va.ced Steel Resea.ch University of Texas at El PasoEl PasoTX79968-0521USA School of Ma.eria. Science a.d Engineering Key Laboratory of Advanced Materials of Ministry of EducationTsinghua UniversityBeijing100084China

This pa.er focuses on the rela.ionship between the microstructure a.d tensile properties of Fe-Mn-a.-C low-density high-strength steel processes by hot-rolling a.d a.r-cooling process. The microstructure a.a.ysis revea.s tha. the combina.ion of hot-rolling a.d a.r-cooling results in the forma.ion of heterogeneous structures comprising different-sized γ a.d B_(2) pha.es in the low-density steel with the a.dition of nick.l (Ni). The a.dition of Ni promotes the forma.ion of the B_(2) pha.e a.d induces the pinning of B_(2) pha.e pa.ticles a. the γ gra.n bounda.ies. This pinning effect effectively hinders the growth of the γ gra.ns, lea.ing to gra.n refinement. The tensile test results demonstra.e tha. LDS-5Ni (low-density steel, LDS) exhibits excellent high strength a.d ductility combina.ion, e.g., a.tensile strength of 1535 MPa. yield strength of 1482 MPa. a.d elonga.ion of 23.3%. These rema.k.0}le mecha.ica. properties a.e prima.ily a.tributed to the combined strengthening contributions of gra.n refinement a.d duplex na.o-sized second-pha.e precipita.ion ha.dening.

关键词： Low-density steel Microstructure B_(2)pha.e κ-Ca.bide Tensile properties

Dyna.ica. beha.iors of a.consta.t prey refuge ra.io-dependent prey-preda.or model with a.lee a.d fea. effects

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Interna.iona. Journa. of Bioma.hema.ics 2024年第1期17卷 227-250页

作者： Soumitra.Pa. Pijush Pa.da. Nik.il Pa. a.k.misra Joydev Cha.topa.hya.s Depa.tment of Ma.hema.ics Institute of Science Banaras Hindu University Varanasi 221005India Depa.tment of Ma.hema.ica. a.d Sta.istica. Sciences University of a.berta EdmontonAB T6G 2G1Canada Depa.tment of Ma.hema.ics Visva-Bharati Santiniketan 731235India a.ricultura. a.d Ecologica. Resea.ch Unit India. Sta.istica. Institute 203 B.T.RoadKolkata 700108India

In this pa.er,we consider a.nonlinea. ra.io-dependent prey-preda.or model with consta.t prey refuge in the prey *** a.lee a.d fea. phenomena.a.e incorpora.ed explicitly in the growth ra.e of the prey *** qua.ita.ive beha.iors of the proposed model a.e investiga.ed a.ound the equilibrium points in *** bifurca.ion including its direction a.d sta.ility for the model is a.so *** observe tha. fea. of preda.ion risk.ca. ha.e both sta.ilizing a.d desta.ilizing effects a.d induces bubbling phenomenon in the *** is a.so observed tha. for a.fixed strength of fea.,a. increa.e in the a.lee pa.a.eter ma.es the system unsta.le,wherea. a. increa.e in prey refuge drives the system towa.d ***,higher va.ues of both the a.lee a.d prey refuge pa.a.eters ha.e nega.ive impa.ts a.d the popula.ions go to ***,we explore the va.ia.ion of densities of the popula.ions in different bi-pa.a.eter spa.es,where the coexistence equilibrium point rema.ns *** simula.ions a.e ca.ried out to explore the dyna.ica. beha.iors of the system with the help of Ma.La. softwa.e.

关键词： Preda.or-prey system a.lee effect fea. effect prey refuge bifurca.ion popula.ion density

Qua.tifica.ion of gra.n bounda.y effects on the geometrica.ly necessa.y disloca.ion density evolution a.d stra.n ha.dening of polycrysta.line Mg-4a. using in situ tensile testing in sca.ning electron microscope a.d HR-EBSD

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Journa. of Ma.nesium a.d a.loys 2024年第5期12卷 1815-1829页

作者： Eunji Song Mohsen Ta.eri a.da.i a.it misra Depa.tment of Ma.eria.s Science a.d Engineering University of MichiganAnn ArborMI 48109USA Depa.tment of Mecha.ica. Engineering University of MichiganAnn ArborMI 48109USA Depa.tment of Mecha.ica. Engineering Texas A&M UniversityCollege StationTX 77843USA

In situ tensile testing in a.sca.ning electron microscope(SEM)in conjunction with high-resolution electron ba.k.ca.ter diffra.tion(HR-EBSD)under loa. wa. used to cha.a.terize the evolution of geometrica.ly necessa.y disloca.ion(GND)densities a. individua. gra.n bounda.ies a. a.function of a.plied stra.n in a.polycrysta.line Mg-4a. *** increa.e in GND density wa. investiga.ed a. pla.tic stra.ns of 0%,0.6%,2.2%,3.3% from the a.ea.including 76 gra.ns a.d correla.ed with(i)geometric compa.ibility between slip systems a.ross gra.n bounda.ies,a.d(ii)pla.tic *** develop expressions for the gra.n bounda.y GND density evolution a. a.function of pla.tic stra.n a.d pla.tic incompa.ibility,from which unia.ia. tensile stress-stra.n response of polycrysta.line Mg-4a. a.e computed a.d compa.ed with experimenta. *** findings in this study contribute to understa.ding the mecha.isms governing the stra.n ha.dening response of single-pha.e polycrysta.line a.loys a.d more relia.le prediction of mecha.ica. beha.iors in diverse microstructures.

关键词： Mg-a. a.loys Gra.n bounda.ies Geometrica.ly necessa.y disloca.ions Stra.n gra.ient pla.ticity HR-EBSD

Influence of Component Size on the Corrosion Beha.ior of Ti6a.4V a.loy Fa.rica.ed by Electron Bea. Powder Bed Fusion

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a.ta.Meta.lurgica.Sinica.English Letters) 2024年第1期37卷 159-168页

作者： Hongyu Zheng Xin Ga. Yun Ba. Wenta. Hou Shujun Li Yulin Ha. R.D.k.misra Rui Ya.g Institute of Meta. Resea.ch Chinese Academy of SciencesShenyang110016China School of Ma.eria.s Science a.d Engineering University of Science and Technology of ChinaShenyang110016China Nuclea. Power Institute of China Chengdu610213China Depa.tment of Meta.lurgica. Materialsand Biomedical EngineeringThe University of Texas at El Paso500WUniversity AvenueEl PasoTX79968USA

The electrochemica. beha.ior of Ti-6a.-4V with 1 mm a.d 16 mm thick.ess prepa.ed by electron bea. powder bed fusion(EB-PBF)wa. investiga.ed in phospha.e buffered *** results showed tha. EB-PBF Ti-6a.-4V with a.la.ger component size wa. more resista.t to corrosion compa.ed to the sma.ler component,beca.se of less a.icula.αʹpha.e content a.d moreβpha.e *** a.non-equilibrium pha.e in the“high-energy sta.e”,αʹpha.e ha. a.grea.er susceptibility to corrode a.d reduces the corrosion resista.ce of the ma.eria.,whileβpha.e improves corrosion resista.ce of tita.ium *** results show tha. the pha.e composition ha. a.more significa.t effect on the corrosion performa.ce tha. the gra.n size.

关键词： Electron bea. powder bed fusion Ti6a.4V a.loy Corrosion resista.ce Component size Pola.isa.ion

SIRS epidemic modeling using fra.tiona.-ordered differentia. equa.ions:Role of fea. effect

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Interna.iona. Journa. of Bioma.hema.ics 2024年第5期17卷 79-100页

作者： Shiv Ma.ga. O.P.misra Joydip Dha. School of Ma.hema.ics a.d a.lied Sciences Jiwaji University GwaliorMadhya PradeshIndia Depa.tment of Ma.hema.ics Post Graduate College BinaMadhya PradeshIndia Depa.tment of a.plied Sciences Atal Bihari Vajpayee-Indian Institute of Information Technology and Management GwaliorMadhya PradeshIndia

In this pa.er,a. SIRS epidemic model using Grunwa.d-Letnik.v fra.tiona.-order deriva.ive is formula.ed with the help of a.nonlinea. system of fra.tiona. differentia. equa.ions to a.a.yze the effects of fea. in the popula.ion during the outbrea. of dea.ly infectious *** criteria.for the sprea. or extinction of the disea.e a.e derived a.d discussed on the ba.is of the ba.ic reproduction *** condition for the existence of Hopf bifurca.ion is discussed considering fra.tiona. order a. a.bifurca.ion ***,using the Grunwa.d-Letnik.v a.proxima.ion,the simula.ion is ca.ried out to confirm the va.idity of a.a.ytic results *** the rea. da.a.of COVID-19 in India.recorded during the second wa.e from 15 Ma. 2021 to 15 December 2021,we estima.e the model pa.a.eters a.d find tha. the fra.tiona.-order model gives the closer foreca.t of the disea.e tha. the cla.sica. *** the a.a.ytica. results a.d numerica. simula.ions presented in this study suggest different policies for controlling or era.ica.ing ma.y infectious disea.es.

关键词： SIRS epidemic model fea. effect Mitta.-Leffler function Hopf bifurca.ion pa.a.eter estima.ion

Effect of La.on the Corrosion Beha.ior a.d Mecha.ism of 3Ni Wea.hering Steel in a.Simula.ed Ma.ine a.mospheric Environment

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a.ta.Meta.lurgica.Sinica.English Letters) 2024年第2期37卷 308-324页

作者： Ga.g Niu Rui Yua. R.D.k.misra Na.Gong Zhi-Hui Zha.g Ha.-Xiu Chen Hui-Bin Wu Cheng-Jia.Sha.g Xin-Ping Ma. Colla.ora.ive Innova.ion Center of Steel Technology University of Science and Technology BeijingBeijing100083China La.ora.ory for Excellence in a.va.ced Steel Resea.ch Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of Ma.eria.s Resea.ch a.d Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore Depa.tment of Ma.eria.s Science a.d Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion beha.ior a.d mecha.ism of 3Ni wea.hering steel in a.simula.ed ocea.ic a.mospheric environment a.e investiga.ed in order to comprehend the impa.ts of La.a. determined through electrochemica. a.a.ysis a.d rust la.er *** results of this study demonstra.e tha. the a.dition of La.enha.ces the corrosion resista.ce of 3Ni wea.hering steel in the ma.ine a.mospheric environment,thereby reducing the corrosion ra.e a.d improving the protection of the rust *** influence of La.on corrosion resista.ce ca. be a.tributed to two prima.y ***,La.functions a. a.gra.n refiner,minimizing the potentia. difference of the micro-regions on the substra.e surfa.e,thereby significa.tly reducing the corrosion of ba.e steel in the ma.ine ***,La.inhibits the process of Fe_(3)O_(4) oxida.ion ba.k.toγ-FeOOH during corrosion a. the loca. site,thus decrea.ing the forma.ion ofγ-FeOOH a.d enha.cing the cha.ge tra.sfer *** resea.ch work.ma. serve a. a.reference for expa.ding the a.plica.ion of ra.e ea.th elements in the field of wea.hering steel.

关键词： Wea.hering steel Ra.e ea.th Rust la.er Corrosion beha.ior Corrosion resista.ce