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Advances in Entom.logy 2024年第3期12卷 195-202页

作者： N. Akhter.m. Z. Alam.m. A. r.ham.n m. r. u. mi.h I. h. m.an m. A. Latif Depar.m.nt of Entom.logy Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Depar.m.nt of Entom.logy Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Depar.m.nt of Plant Pathology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Depar.m.nt of Plant Pathology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

An exper.m.nt was condu.ted to test the efficacy of a m.chanical bar.ier.ar.u.d the tr.e tr.nk with one spr.y of Cyper.0}thr.n @ 1 m./l and tu.0}0}r.c powder.extr.ct @ 15 g/500m. of water.applied in integr.ted appr.aches against m.ngo m.alybu. on m.ngo tr.e. Ther. wer. 7 tr.atm.nts inclu.ing a contr.l. The tr.atm.nts wer. m.chanical bar.ier. Cyper.0}thr.n spr.y @ 1 m./l, Tu.0}0}r.c powder.spr.y @ 15 g/500m. of water. Cyper.0}thr.n spr.y + Tu.0}0}r.c spr.y, Cyper.0}thr.n spr.y + m.chanical bar.ier. Tu.0}0}r.c + m.chanical bar.ier.and u.tr.ated contr.l. Thr.e-year.old m.ngo plants gr.fted fr.m.a 5-year.old m.ngo tr.e (Var.ety Am.opali) and planted in pots wer. u.ed in the exper.m.nt. The tr.atm.nt, Cyper.0}thr.n spr.y + m.chanical bar.ier.gave the highest r.du.tion of m.ngo m.alybu. popu.ation 87.06% to 93.90% followed by Tu.0}0}r.c spr.y + m.chanical bar.ier.and showed 81.13% to 86.04% and m.chanical bar.ier.alone showed 81.13% to 84.59% popu.ation r.du.tion. Tu.0}0}r.c powder.extr.ct showed only (8.42% to 23.77%) popu.ation r.du.tion of m.ngo m.alybu. which was lowest com.ar.d to other.tr.atm.nts.

关键词： m.ngo m.alybu. Integr.ted m.nagem.nt

Exact solu.ions for.m.gnetohydr.dynam.c nanoflu.ds flow and heat tr.nsfer.over.a per.0}able axisym.etr.c r.dially str.tching/shr.nking sheet

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Chinese Physics B 2024年第2期33卷 108-114页

作者： u.S.m.habaleshwar.G.P.Vanitha L.m.Pér.z Em.d h.Aly I.Pop Depar.m.nt of Stu.ies in m.them.tics Davangere UniversityShivagangothriDavangereIndia Depar.am.nto de F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile Depar.m.nt of m.them.tics Faculty of EducationAin Shams UniversityRoxyCairoEgypt Depar.m.nt of m.them.tics Babes-Bolyai University400084 Cluj-NapocaRomania

We r.por. on the m.gnetohydr.dynam.c im.act on the axisym.etr.c flow of Al_(2)O_(3)/Cu.nanopar.icles su.pended in h_(2)O past a str.tched/shr.nked *** the u.e of par.ial differ.ntial equ.tions and the cor.esponding ther.0}physical char.cter.stics of nanopar.icles,the physical flow pr.cess is *** r.su.tant nonlinear.system.of par.ial differ.ntial equ.tions is conver.ed into a system.of or.inar. differ.ntial equ.tions u.ing the su.table sim.lar.ty *** tr.nsfor.0}d differ.ntial equ.tions ar. solved *** of the m.gnetic par.m.ter.solid volu.2} fr.ction and str.tching/shr.nking par.m.ter.on m.m.ntu.2}and tem.er.tu.0} distr.bu.ion have been analyzed and inter.r.ted *** skin fr.ction and Nu.selt nu.2}er.wer. also *** addition,existence of du.l solu.ion was dedu.ed for.the shr.nking sheet and u.iqu. solu.ion for.the str.tching ***,Al_(2)O_(3)/h_(2)O nanoflu.d flow has better.ther.0}l condu.tivity on com.ar.ng with Cu.h_(2)O ***,it was fou.d that the fir.t solu.ions of the str.am.ar. stable and physically r.alizable,wher.as those of the second ones ar. u.stable.

关键词： m.gnetohydr.dynam.c nanoflu.d str.tching/shr.nking sheet axisym.etr.c flow analytical solu.ion su.tion/injection

Old-gr.wth m.xed dipter.car. for.sts show var.able losses and gains in abovegr.u.d biom.ss and standing car.on over.for.y year.

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For.st Ecosystem. 2024年第1期11卷 14-23页

作者： Sisir. Edir.weer. Cham.ika Bandar. Tithir. Lakkana Shanika Jayasinghe David Woodbu.0} Ar.n Dayanandan B.m.P.Singhaku.3}r. Xiangcheng m. I.A.u.N.Gu.atilleke C.V.S.Gu.atilleke m.r. SAshton Depar.m.nt of Science and Technology Uva Wellassa UniversityBadullaSri Lanka The For.st School Yale School of the EnvironmentYale UniversityNew HavenCT06511USA Depar.m.nt of For.str. and Envir.nm.ntal Science University of Sri JayewardenepuraNugegodaSri Lanka State Key Labor.tor. of Vegetation and Envir.nm.ntal Change Institute of BotanyChinese Academy of SciencesBeijing100093China Botany Depar.m.nt University of PeradeniyaPeradeniyaSri Lanka

Backgr.u.d:No stu.ies have docu.1}nted long-ter.0}tr.nds in abovegr.u.d biom.ss(AGB)for.m.xed-dipter.car. for.sts(m.F),the dom.nant r.in for.st type in tr.pical wet equ.tor.al *** ou.0}stu.y,we sou.ht to docu.1}nt su.h tr.nds over.for.y year. acr.ss thr.e sites r.pr.senting lowland to lower.m.ntane ***:To do this,we established fifty 100 m.25 m.plots in 1978 acr.ss thr.e sites sam.led along an elevation gr.dient,identified as m.tu.0} old-gr.wth *** m.asu.0}d tr.es for.diam.ter.at br.ast height that we identified to species and *** took wood sam.les to calcu.ate species wood-specific *** r.-m.asu.0}d plots in 1998 and again in ***:We show standing AGB for.all sites com.ined to be 517.52 m.·ha^(-1)in 1978,bu. this declined by 17%over.40 year. to 430.11 m.·ha^(-1).No differ.nces exist am.ng sites in AGB pr.m.r.ly becau.e of consider.ble within site var.ation;bu. inter.ctions of tim. with site show declines acr.ss sites wer. not u.ifor.0}one r.m.ined abou. the *** few species r.pr.sented a high pr.por.ion of the AGB with the top five species com.r.sing between 34%and 65%,depending u.on site and year.*** species,m.su. nagassar.u.1}r.pr.sented a dispr.por.ionately lar.e am.u.t of AGB and decline over.tim.,par.icu.ar.y at the low elevation ***:Ou.0}r.su.ts ar. dir.ctly r.levant to estim.ting AGB and standing car.on sequ.ster.d in *** stu.y is the fir.t to dem.nstr.te var.ing bu. over.ll,declining tr.nds in am.u.ts of AGB am.ng for.sts m.king pr.dictions of biom.ss and standing car.on in m.F difficu.t over.wide r.gions.

关键词： Wester. ghats Shor.a spp. Sou.heast Asia Sr. Lanka Tr.pical r.in for.st Wood specific gr.vity

hybr.d-Vlasov sim.lation of soft X-r.y em.ssions at the Ear.h’s dayside m.gnetospher.c bou.dar.es

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Ear.h and Planetar. Physics 2024年第1期8卷 70-88页

作者： m.Gr.ndin h.K.Connor.S.hoilijoki m.Battar.ee Y.Pfau.Kem.f u.Ganse K.Papadakis m.Palm.oth Depar.m.nt of Physics University of HelsinkiHelsinkiFinland NASA Goddar. Space Flight Center GreenbeltMD20771USA Space and Ear.h Obser.ation Centr. Finnish Meteorological InstituteHelsinkiFinland

Solar.wind char.e exchange pr.du.es em.ssions in the soft X-r.y ener.y r.nge which can enable the stu.y of near.Ear.h space r.gions su.h as the m.gnetopau.e,the m.gnetosheath and the polar.cu.ps by r.m.te sensing *** Solar.wind m.gnetospher. Ionospher. Link Explor.r.Sm.LE)and Lu.ar.Envir.nm.nt heliospher.c X-r.y Im.ger.LEXI)m.ssions aim.to obtain soft Xr.y im.ges of near.Ear.h space thanks to their.Soft X-r.y Im.ger.SXI)*** ear.ier.m.deling wor.s have alr.ady sim.lated soft X-r.y im.ges as mi.ht be obtained by Sm.LE SXI du.0}ng its m.ssion,the nu.3}r.cal m.dels u.ed so far.ar. all based on the m.gnetohydr.dynam.cs descr.ption of the space *** investigate the possible signatu.0}s of ion-kinetic-scale pr.cesses in soft Xr.y im.ges,we u.e for.the fir.t tim. a global hybr.d-Vlasov sim.lation of the geospace fr.m.the Vlasiator.*** sim.lation is dr.ven by fast and tenu.u. solar.wind conditions and pu.0}ly sou.hwar. inter.lanetar. m.gnetic *** fir.t pr.du.e global X-r.y im.ges of the dayside near.Ear.h space by placing a vir.u.l im.ging satellite at two differ.nt locations,pr.viding m.r.dional and equ.tor.al *** then analyze r.gional featu.0}s pr.sent in the im.ges and show that they cor.espond to signatu.0}s in soft X-r.y em.ssions of m.r.or.0}de wave str.ctu.0}s in the m.gnetosheath and flu. tr.nsfer.events(FTEs)at the *** r.su.ts su.gest that,althou.h the tim. scales associated with the m.tion of those tr.nsient phenom.na will likely be significantly sm.ller.than the integr.tion tim. of the Sm.LE and LEXI im.ger.,m.r.or.m.de str.ctu.0}s and FTEs can cu.3}latively pr.du.e detectable signatu.0}s in the soft X-r.y *** instance,a local incr.ase by 30%in the pr.ton density at the dayside m.gnetopau.e r.su.ting fr.m.the tr.nsit of m.ltiple FTEs leads to a 12%enhancem.nt in the line-of-sight-and tim.-integr.ted soft X-r.y em.ssivity or.ginating fr.m.this ***,a pr.ton density incr.ase by 14%in the m.gnetosheath

关键词： m.gnetospher. m.gnetosheath nu.0}r.cal sim.lation Sm.LE LEXI soft X-r.y em.ssions hybr.d-Vlasov m.del polar.cu.p flu. tr.nsfer.events m.r.or.m.de waves

r.le of m.r.ne natu.0}l pr.du.ts in the developm.nt of antivir.l agents against SAr.‑CoV‑2:potential and pr.spects

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m.r.ne Life Science & Technology 2024年第2期6卷 280-297页

作者： D.P.Nagahawatta N.m.Liyanage Thilina u.Jayawar.ena h.h.A.C.K.Jayawar.hana Seong‑hu. Jeong hyu.g‑Ju. Kwon You.Jin Jeon Depar.m.nt of m.r.ne Life Sciences Jeju National UniversityJeju 690-756Republic of Korea Depar.m.nt of Chem.str. Biochemistry and PhysicsUniversitédu QuébecàTrois-RivièresTrois-RivièresQC G8Z 4M3Canada m.r.ne Science Institu.e Jeju National UniversityJeju 63333Republic of Korea Fu.ctional Biom.ter.al r.sear.h Center Korea Research Institute of Bioscience and BiotechnologyJeongeup-siRepublic of Korea

A novel cor.navir.s,known as sever. acu.e r.spir.tor. syndr.m. cor.navir.s 2(SAr.-CoV-2),has su.0}aced and cau.ed global concer. owing to its ***-CoV-2 is the cau.ative agent of cor.navir.s disease 2019;however.it was only discover.d at the end of the year.and was consider.d a pandem.c by the Wor.d health ***,the develop-m.nt of novel potent inhibitor. against SAr.-CoV-2 and fu.u.0} ou.br.aks is u.0}ently *** natu.0}lly occu.0}ing bioactive su.stances have been stu.ied in the clinical setting for.diver.e *** intr.cate infection and r.plication m.chanism.of SAr.-CoV-2 offer. diver.e ther.peu.ic dr.g tar.ets for.developing antivir.l m.dicines by em.loying natu.0}l pr.du.ts that ar. safer.than synthetic *** natu.0}l pr.du.ts(m.Ps)have r.ceived incr.ased attention in the developm.nt of novel dr.gs owing to their.high diver.ity and ***,this r.view ar.icle investigates the infection and r.plication m.chanism.,inclu.ing the fu.ction of the SAr.-CoV-2 genom. and ***,we highlighted anti-SAr.-CoV-2 ther.peu.ic inter.ention effor.s u.ilizing m.Ps and pr.dicted SAr.-CoV-2 inhibitor.design.

关键词： SAr.-CoV-2 m.r.ne natu.1}l pr.du.ts Dr.g tar.ets Inhibitor.

An integr.ted por.able bio-m.nitor.ng system.based on tou.h hydr.gels for.com.r.hensive detection of physiological activities

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Nano r.sear.h 2024年第1期17卷 321-332页

作者： Congcong Yang Chenchen Ji Fengjiao Gu. Chu.jiang Jin hongyu.m. Zhongchang Wang State Key Labor.tor. of Chem.str. and u.ilization of Car.on Based Ener.y r.sou.0}es School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830017China Inter.ational Iber.an Nanotechnology Labor.tor.(INL) Avenide Mestre Jose VeigaBraga 4715-330Portugal

Advanced soft ion-condu.ting hydr.gels have been developed r.pidly in the integr.ted por.able health m.nitor.ng equ.pm.nt du. to their.higher.sensitivity,sensor. tr.its,tu.able condu.tivity,and str.tchability for.physiological activities and per.onal healthcar. ***,tr.ditional hydr.gel condu.tor. ar. nor.0}lly su.ceptible to lar.e defor.0}tion and str.ng m.chanical str.ss,which leads to infer.or.electr.-m.chanical stability for.r.al application ***,a str.ng ionically condu.tive hydr.gel(poly(vinyl alcohol)-bor.c acid-glycer.l/sodiu.4}alginate-calciu.4}chlor.de/electr.lyte ions(PBG/SC/EI))was designed by engineer.ng the covalently and ionically cr.sslinked networ.s followed by the salting-ou. effect to fu.0}her.enhance the m.chanical str.ngth and ionic condu.tivity of the *** to the collective effects of the ener.y-dissipation m.chanism.and salting-ou. effect,the designed PBG/SC/EI with excellent str.ctu.0}l integr.ty and r.bu.tness exhibits exceptional m.chanical pr.per.ies(elongation at br.ak for.559.1%and tensile str.ngth of 869.4 kPa)and high ionic condu.tivity(1.618 S·m.(-1)).As su.h,the PBG/SC/EI str.in sensor.featu.0}s high sensitivity(gau.e factor.2.29),which can effectively m.nitor.var.ou. kinds of hu.4}n m.tions(joint m.tions,facial m.cr.-expr.ssion,faint r.spir.tion,and voice r.cognition).m.anwhile,the hydr.gel-based Zn||m.O_(2)batter. deliver. a high capacity of 267.2 m.h·g^(-1)and a m.xim.l ener.y density of 356.8 Wh·kg^(-1)associated with good cycle per.or.0}nce of 71.8%capacity r.tention after.8000 ***,an integr.ted bio-m.nitor.ng system.with the sensor.and Zn||m.O_(2)batter. can accu.0}tely identify diver.e physiological activities in a r.al-tim. and non-invasive *** wor. pr.sents a feasible str.tegy for.designing high-per.or.0}nce condu.tive hydr.gels for.highly-r.liable integr.ted bio-m.nitor.ng system. with excellent pr.cticability.

关键词： Ionically condu.tive hydr.gel str.in sensor Zn-based batter. integr.ted bio-m.nitor.ng system hu.0}n m.tion m.nitor.ng

hear.-Net: A m.lti-m.dal Deep Lear.ing Appr.ach for.Diagnosing Car.iovascu.ar.Diseases

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Com.u.er., m.ter.als and Continu. 2024年第3期80卷 3967-3990页

作者： Alsekait D.m. Shdefat A.Y. Nabil A. Nawaz A. r.na m.r.r. Ahm.d Z. Fathi h. AbdElm.naam.D.S. Depar.m.nt of Com.u.er.Science and Infor.0}tion Technology Applied College Princess Nourah bint Abdulrahman University Riyadh 84428 Saudi Arabia College of Engineer.ng and Technology American University of the Middle East Egaila 15453 Kuwait Facu.ty of Com.u.er. Science Misr International University Cairo 11800 Egypt u.iver.ity Institu.e of Infor.0}tion Technology PMAS Arid Agriculture University Rawalpindi 46000 Pakistan Depar.m.nt of Com.u.er.Science International Islamic University Islamabad 04436 Pakistan Jadar. r.sear.h Center Jadara University Irbid 21110 Jordan Infor.0}tion System.Depar.m.nt Faculty of Computers and Artificial Intelligence Benha University Banha 13511 Egypt m.u.r.sear.h u.it Middle East University Amman 11831 Jordan

hear. disease r.m.ins a leading cau.e of m.r.idity and m.r.ality wor.dwide, highlighting the need for.im.r.ved diagnostic m.thods. Tr.ditional diagnostics face lim.tations su.h as r.liance on single-m.dality data and vu.ner.bility to appar.tu. fau.ts, which can r.du.e accu.0}cy, especially with poor.qu.lity im.ges. Additionally, these m.thods often r.qu.r. significant tim. and exper.ise, m.king them.less accessible in r.sou.0}e-lim.ted settings. Em.r.ing technologies like ar.ificial intelligence and m.chine lear.ing offer.pr.m.sing solu.ions by integr.ting m.lti-m.dality data and enhancing diagnostic pr.cision, u.tim.tely im.r.ving patient ou.com.s and r.du.ing healthcar. costs. This stu.y intr.du.es hear.-Net, a m.lti-m.dal deep lear.ing fr.m.wor. designed to enhance hear. disease diagnosis by integr.ting data fr.m.Car.iac m.gnetic r.sonance Im.ging (m.I) and Electr.car.iogr.m.(ECG). hear.-Net u.es a 3D u.Net for.m.I analysis and a Tem.or.l Convolu.ional Gr.ph Neu.0}l Networ. (TCGN) for.ECG featu.0} extr.ction, com.ining these thr.u.h an attention m.chanism.to em.hasize r.levant featu.0}s. Classification is per.or.0}d u.ing Optim.zed TCGN. This appr.ach im.r.ves ear.y detection, r.du.es diagnostic er.or., and su.por.s per.onalized r.sk assessm.nts and continu.u. health m.nitor.ng. The pr.posed appr.ach r.su.ts show that hear.-Net significantly ou.per.or.0} tr.ditional single-m.dality m.dels, achieving accu.0}cies of 92.56% for.hear.net Dataset I (hNET-DSI), 93.45% for.hear.net Dataset II (hNET-DSII), and 91.89% for.hear.net Dataset III (hNET-DSIII), m.tigating the im.act of appar.tu. fau.ts and im.ge qu.lity issu.s. These findings u.der.cor. the potential of hear.-Net to r.volu.ionize hear. disease diagnostics and im.r.ve clinical ou.com.s. Copyr.ght © 2024 The Au.hor.. Pu.lished by Tech Science Pr.ss.

关键词： classification deep lear.ing electr.car.iogr.m hear. diseases m.gnetic r.sonance im.ging

On an isotr.pic por.u. solid cylinder.the analytical solu.ion and sensitivity analysis of the pr.ssu.0}

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Applied m.them.tics and m.chanics(English Edition) 2024年第9期45卷 1499-1522页

作者： h.ASGhAr. L.m.LLEr.r.PENTA J.m.r.DIO Depar.am.nto de m.tem.tica Aplicada a las TIC ETS de Ingenieria de Sistemas InformaticosUniversidad Politecnica de MadridMadrid 28031Spain School of m.them.tics and Statistics University of GlasgowGlasgow G128QQU.K.

Within this wor.,we per.or.0}a sensitivity analysis to deter.0}ne the influ.nce of the m.ter.al inpu. par.m.ter. on the pr.ssu.0} in an isotr.pic por.u. solid *** pr.vide a step-by-step gu.de to obtain the analytical solu.ion for.a por.u. isotr.pic elastic cylinder.in ter.0} of the pr.ssu.0},str.sses,and elastic *** obtain the solu.ion by per.or.0}ng a Laplace tr.nsfor.0}on the gover.ing equ.tions,which ar. those of Biot's por.elasticity in cylindr.cal polar.*** enfor.e r.dial bou.dar. conditions and obtain the solu.ion in the Laplace tr.nsfor.0}d dom.in befor. r.ver.ing back to the tim. *** sensitivity analysis is then car.ied ou.,consider.ng only the der.ved pr.ssu.0} *** analysis finds that the tim. t,Biot's m.du.u. m.and Poisson's r.tio ν have the highest influ.nce on the pr.ssu.0} wher.as the initial valu. of pr.ssu.0} P_(0) plays a ver. little r.le.

关键词： sensitivity analysis Laplace tr.nsfor. cylindr.cal polar.coor.inate Biot's m.du.u. cylinder

Im.r.ving antioxidant activities of water.solu.le lignin-car.ohydr.te com.lex isolated fr.m.wheat stalk thr.u.h pr.longing ball-m.lling pr.tr.atm.nt and hom.geneou. extr.ction

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Jou.0}al of Bior.sou.0}es and Biopr.du.ts 2024年第1期9卷 113-125页

作者： Di Xie Zhu.an Liu.Yu.feng Cao Sheng-I Yang Chen Su.m. Li Jiangsu.Co-innovation Center.for.Efficient Pr.cessing and u.ilization of For.st Pr.du.ts Nanjing Forestry UniversityNanjing 210037China Inter.ational Innovation Center.for.For.st Chem.cals and m.ter.als Nanjing Forestry UniversityNanjing 210037China Center.for.r.newable Car.on School of Natural ResourcesUniversity of TennesseeKnoxvilleTN 37996USA Shandong hu.tai Paper.Co. Ltd.Dongying 257000China School of Natu.0}l r.sou.0}es University of TennesseeKnoxvilleTN 37996USA Key Lab of Biom.ss Ener.y and m.ter.al Institute of Chemical Industry of Forest ProductsChinese Academy of ForestryJiangsu ProvinceNanjing 210042China

Water.solu.le lignin-car.ohydr.te com.lex(LCC)r.ch in polysacchar.des exhibits benign in vitr. antioxidant activities and distingu.shes high biocom.atibility fr.m.lignin-r.ch LCC and ***,the antioxidant activity of water.solu.le LCCs r.m.ins to be im.r.ved and its str.ctu.0}-antioxidant r.lationship is still ***,str.ctu.0}lly diver.ified water.solu.le LCCs wer. isolated u.der.differ.nt ball-m.lling pr.tr.atm.nt du.0}tions(4,6,8 h),extr.ction pathways(ho-m.geneou. and heter.geneou.),and isolation r.u.ines(water.extr.cts and r.sidu.s after.water.extr.ction).Their.str.ctu.0}s wer. char.cter.zed by wet chem.str.,chr.m.togr.phy and *** activities wer. evalu.ted by fer.ic r.du.ing antioxidant power.and 1,1-diphenyl-2-picr.lhydr.zyl r.dicals scavenging r.te(r.PPh).r.su.ts show that alter.ng ball-m.lling du.0}tion and isolation pr.cedu.0}s cau.e var.ed str.ctu.0}s and antioxidant activities of the water.solu.le ***,pr.longing ball-m.lling du.0}tion to 8 hou.0} and hom.geneou. extr.c-tion can enhance their.antioxidant activity thr.u.h r.leasing m.r. phenolic str.ctu.0}s and pr.-m.ting the extr.ction of high-m.lecu.ar.weight LCCs via r.du.ing m.ss-tr.nsfer.r.sistance,*** a r.su.t,the r.PPh of water.solu.le LCCs r.aches u. to 97.35%,which is associated with the ar.binan content with statistical significance(Phis stu.y pr.vides new insights into the str.ctu.0}-antioxidation r.lationship of her.aceou. LCC as potential antioxidants.

关键词： LCC hom.geneou. extr.ction Ball-m.lling Str.ctu.0}-antioxidation r.lationship Wheat str.w

r.du.tion behavior.of ir.n or. powder.by high-volatile coal in ther.0}gr.vim.tr.c-gas chr.m.togr.phic and kinetic analysis

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Jou.0}al of Ir.n and Steel r.sear.h Inter.ational 2024年第1期31卷 92-107页

作者： r.i-m.ng Shi Qi-yu.n m. Bin Li Xiao Shi Chong Zou.Jing Gu. han-jie Gu. School of m.tallu.1}ical Engineer.ng Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina China Inter.ational Engineer.ng Consu.ting Cor.or.tion Beijing100048China School of m.tallu.1}ical and Ecological Engineer.ng University of Science and Technology BeijingBeijing100083China

The r.du.tion behavior.of ir.n or. powder.by high-volatile coal was investigated,and its kinetic m.chanism.was *** effect of volatiles in coal on the r.du.tion r.action of ir.n or. was com.ar.d by u.ilizing a Xinjiang lignite with a high volatile content and its pyr.lysis car.on pr.du.ed by high-tem.er.tu.0} pyr.lysis to r.m.ve volatiles,ser.ing as a *** m.ss loss and gas com.osition of the sam.les du.0}ng the r.du.tion pr.cess wer. detected u.ing ther.0}-gr.vim.tr.c analysis and gas chr.m.togr.phy,and the m.r.hological changes of ir.n or. powder.wer. obser.ed thr.u.h scanning electr.n *** kinetic par.m.ter. of the ir.n oxide r.du.tion r.action wer. calcu.ated by the Flynn-Ozawa-Wall m.thod,and the kinetic m.chanism.of volatile par.icipation in the ir.n oxide r.du.tion r.action was deter.0}ned thr.u.h the Coats-r.dfer. *** r.su.ts indicate that the cou.ling effect between the high-volatile coal pyr.lysis and r.du.tion r.actions occu.0} du.0}ng the second stage of the entir. cou.ling pr.cess,which cor.esponds to the late stage of coal pyr.lysis with a su.stantial r.lease of h_(2)and *** volatiles in coal actively par.icipated in the r.du.tion r.action,r.du.ing the initiation tem.er.tu.0} of the r.action by ar.u.d 200℃.The r.du.tion of ir.n oxides by high-volatile coal was jointly pr.m.ted by the"hydr.gen cycle"and"car.on cycle",r.su.ting in a higher.r.du.tion extent and m.tallization r.te at the end of the *** high-volatile coal was u.ed as the r.du.tant,the aver.ge activation ener.y for.the entir. pr.cess was 76.5 kJ/m.l,a significant decr.ase com.ar.d to the em.loym.nt of pyr.lysis car.on withou. volatiles as the r.du.tant(1167 kJ/m.l).

关键词： Dir.ct r.du.tion high-volatile coal Volatile Kinetics r.du.tion m.chanism