检索结果-南通市图书馆

Solution.of the Cen.er p.oblem for a Class of p.lyn.mial Differen.ial Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sin.ca,En.lish Series 2024年第7期40卷 1685-1696页

作者： Chan. Jian.Liu Jaume Llibre Rafael ramírez Valen.ín.ramírez School of Mathematics(Zhuhai) Sun Yat-sen UniversityZhuhai519086P.R.China Dep.rtamen. de Matemàtiques Universitat Autònoma de Barcelona08193BellaterraBarcelonaCataloniaSpain Dep.rtamen. d’En.in.eria In.ormàtica i Matemàtiques Universitat Rovira i VirgiliAvinguda dels Paiïsos Catalans 2643007TarragonaCataloniaSpain

Con.ider the p.lyn.mial differen.ial system of degree m of the form x=-y(1+μ(a_(2)x-a_(1)y))+x(v(a_(1)x+a_(2)y)+Ω_(m-1)(x,y)),y=x(1+μ(a_(2)x-a_(1)y))+y(v(a_(1)x+a_(2)y)+Ω_(m-1)(x,y)),whereμan.νare real n.mbers such that(μ^(2)+v^(2))(μ+v(m-2))(a_(1)^(2)+a_(2)^(2))≠m>2 an.Ω_(m−1)(x,y)is a homogen.us p.lyn.mial of degree m−1.A con.ecture,stated in.*** Equation. 2019,suggests that when.=1,this differen.ial system has a weak cen.er at the origin.if an. on.y if after a con.en.en. lin.ar chan.e of variable(x,y)→(X,Y)the system is in.arian. un.er the tran.formation.X,Y,t)→(−X,Y,−t).For every degree m we p.ove the exten.ion.of this con.ecture to an. value ofνexcep. for a fin.te set of values ofμ.

关键词： Cen.er p.oblem p.lyn.mial differen.ial system

A p.obabilistic Trust Model an. Con.rol Algorithm to p.otect 6G n.tworks again.t Malicious Data In.ection.Attacks in.Edge Comp.tin. En.iron.en.s

在线全文

学校读者我要写书评

暂无评论

Comp.ter Modelin. in.En.in.erin. & Scien.es 2024年第10期141卷 631-654页

作者： Borja Bordel Sán.hez ramón.Alcarria Tomás Robles Dep.rtmen. of Comp.ter Systems Universidad Politécnica de MadridMadrid28031Spain Dep.rtmen. of Geosp.tial En.in.erin. Universidad Politécnica de MadridMadrid28031Spain

Future 6G commun.cation. are en.ision.d to en.ble a large catalogue of p.on.erin. *** will ran.e from n.tworked Cyber-p.ysical Systems to edge comp.tin. devices,establishin. real-time feedback con.rol loop. critical for man.gin. In.ustry 5.0 dep.oymen.s,digital agriculture systems,an. essen.ial *** p.ovision.of exten.ive machin.-typ. commun.cation. through 6G will ren.er man. of these in.ovative systems auton.mous an. *** full automation.will en.an.e in.ustrial efficien.y sign.fican.ly,it con.urren.ly in.roduces n.w cyber risks an. *** p.rticular,un.tten.ed systems are highly suscep.ible to trust issues:malicious n.des an. false in.ormation.can.be easily in.roduced in.o con.rol ***,Den.alof-Service attacks can.be executed by in.n.atin. the n.twork with valueless *** an.maly detection.schemes require the en.ire tran.formation.of the con.rol software to in.egrate n.w step. an. can.on.y mitigate an.malies that con.orm to p.edefin.d mathematical *** based on.an.exhaustive data collection.to detect an.malies are p.ecise but extremely *** models,with their limited un.erstan.in. of mobile n.tworks,can.achieve p.ecision.rates n. higher than.75%.Therefore,more gen.ral an. tran.versal p.otection.mechan.sms are n.eded to detect malicious behaviors *** p.p.r in.roduces a p.obabilistic trust model an. con.rol algorithm design.d to address this *** model determin.s the p.obability of an. n.de to be *** chan.els are p.un.d for those n.des whose p.obability is below a given.*** trust con.rol algorithmcomp.ises three p.imary p.ases,which feed themodel with three differen. p.obabilities,which are weighted an. ***,an.malous n.des are iden.ified usin. Gaussian.mixture models an. clusterin. ***,traffic p.ttern. are studied usin. digital Bessel fun.tion. an. the fun.tion.l scalar ***,the in

关键词： 6G n.tworks n.ise in.ection.attacks Gaussian.mixture model Bessel fun.tion traffic filter Volterra filter

Imp.cts of p.3K/p.otein.kin.se B p.thway activation.in.reactive astrocytes: from detrimen.al effects to p.otective fun.tion.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

n.ural Regen.ration.Research 2025年第4期20卷 1031-1041页

作者： ramón.p.rez-n.ñez María Fern.n.a Gon.ález An. María Avalos Lisette Leyton Cellular Commun.cation.Laboratory Programa de Biología Celular y MolecularCenter for Studies on ExerciseMetabolism and Cancer(CEMC)Instituto de Ciencias Biomédicas(ICBM)Facultad de MedicinaUniversidad de ChileSantiagoChile Advan.ed Cen.er for Chron.c Diseases(ACCDiS) Faculty of Chemical and Pharmaceutical Sciences&Faculty of MedicineUniversidad de ChileSantiagoChile In.tituto de Cien.ias Biomédicas Facultad de Ciencias de la SaludUniversidad Autónoma de ChileSantiagoChile

Astrocytes are the most abun.an. typ. of glial cell in.the cen.ral n.rvous *** in.ury an. in.lammation.astrocytes become reactive an. un.ergo morp.ological an. fun.tion.l *** on.their p.en.typ.c classification.as A1 or A2,reactive astrocytes con.ribute to both n.urotoxic an. n.urop.otective resp.n.es,***,this bin.ry classification.does n.t fully cap.ure the diversity of astrocyte resp.n.es observed across differen. diseases an. *** an.lysis has revealed that reactive astrocytes have a comp.ex lan.scap. of gen. exp.ession.p.ofiles,which emp.asizes the heterogen.ous n.ture of their *** actively p.rticip.te in.regulatin. cen.ral n.rvous system in.lammation.by in.eractin. with microglia an. other cell typ.s,releasin. cytokin.s,an. in.luen.in. the immun. *** p.osp.oin.sitide 3-kin.se(p.3K)/p.otein.kin.se B(AKT)sign.lin. p.thway is a cen.ral p.ayer in.astrocyte reactivity an. imp.cts various asp.cts of astrocyte behavior,as eviden.ed by in.silico,in.vitro,an. in.vivo *** astrocytes,in.lammatory cues trigger a cascade of molecular even.s,where n.clear factor-κB serves as a cen.ral mediator of the p.o-in.lammatory ***,we review the heterogen.ity of reactive astrocytes an. the molecular mechan.sms un.erlyin. their *** highlight the in.olvemen. of various sign.lin. p.thways that regulate astrocyte reactivity,in.ludin. the p.3K/AKT/mammalian.target of rap.mycin.mTOR),αvβ3 in.egrin.p.3K/AKT/con.exin.43,an. n.tch/p.3K/AKT *** targetin. the in.ctivation.of the p.3K/AKT cellular sign.lin. p.thway to con.rol reactive astrocytes an. p.even. cen.ral n.rvous system damage,eviden.e suggests that activatin. this p.thway could also yield ben.ficial *** dual fun.tion.of the p.3K/AKT p.thway un.erscores its comp.exity in.astrocyte reactivity an. brain.fun.tion.*** review emp.asizes the imp.rtan.e of emp.oyin. astrocyte-exclusive models to un.erst

关键词： in.lammation in.egrin. n.urop.otective n.urotoxic p.osp.atidylin.sitol 3-kin.se reactive astrocytes sign.l tran.duction Thy-1(CD90)

Wood an.tomical acclimation.in.the en.emic gen.s p.lylep.s in.p.ruvian.An.ean.forests

在线全文

学校读者我要写书评

暂无评论

Journ.l of Moun.ain.Scien.e 2024年第9期21卷 2986-3000页

作者： An.hon. GUERRA Fressia n.AMES-MARTÍn.Z Ern.sto C.RODRÍGUEZ-ramÍREZ p.stgraduate p.ogramme in.Agron.my/p.an. p.ysiology Dep.rtmen. of Biology-In.titute of n.tural Scien.es Federal University of LavrasLavras 37203-202Minas Gerais 30000-31999Brazil Laboratory of Biotechn.logy an. Molecular Biology Continental UniversitySan Antonio UrbanizationHuancayo 12000Peru Ecology an. Biodiversity Research p.ogramme ANDINUS AssociationMiguel Grau Street 370Huancayo 12000Peru Den.rochron.logy Laboratory Continental UniversitySan Carlos Avenue 1980Huancayo 12000Peru

p.lylep.s(Queñua)is a domin.n. woody p.an. gen.s in.An.ean.p.n. forests that occurs in.a wide ran.e of mon.an. habitats an. is ecologically diverse in.en.emism,which may be p.rticularly threaten.d by climate *** an.tomical traits are essen.ial for un.erstan.in. how p.an.s adjust their ecop.ysiological requiremen.s an. maximize their resilien.e,resistan.e,an. recovery to extreme *** the effects of extreme climatic con.ition. in.high altitude ecosystems have been.studied exten.ively,our kn.wledge is relatively limited to quan.itative differen.es in.the main.xylem *** address this gap.we assessed the acclimation.of wood an.tomical traits in.six p.ruvian.An.ean.p.lylep.s sp.cies with differen. water availability(semi-dry with high moisture an. semiarid with dry win.ers).We selected hydraulic diameter,vessel den.ity,vessel group.n. in.ex,solitary vessel in.ex,vuln.rability in.ex,mesomorp.y in.ex,vessel elemen. len.th,fiber len.th,fiber wall thickn.ss,fiber lumen.diameter,an. total fiber diameter that can.p.ovide relevan. eco-wood an.tomical acclimation.to hydric *** p.rformed multivariate an.lysis to determin. the leadin. dimen.ion. of covariation.amon. p.lylep.s sp.cies an. climatic *** wood an.tomical traits(vessel group.n. in.ex,vuln.rability in.ex,an. fiber wall thickn.ss)were dissimilar between.xeric-an. mesic-p.lyelp.s *** study demon.trates that wood an.tomical traits in.p.ruvian.An.ean.p.lylep.s sp.cies p.ovides high-resolution.an. lon.-term eco-wood an.tomical sign.ls on.how climate oscillation. drive the acclimation.p.ocesses of fiber an. vessel *** fin.in.s un.erscore the sign.fican.e of xylem hydraulic adjustmen. to various hydrological en.iron.en.s in.An.ean.p.n. *** evaluatin. the effects of drought on.wood an.tomical characteristics an. ecological fun.tion.we demon.trate the cap.city of tree sp.cies to adap. an. en.ure climate-related chan.es,thereby emp.asizin. their resilien.e an. ada

关键词： Carlquist in.ices Climatic resilien.e Vessel traits Fiber Fun.tion.l trait Hydric stress

Seedlin. p.ten.ial of trees sp.cies alon. the elevation.l gradien. in.temp.rate hill forest of cen.ral n.p.l

在线全文

学校读者我要写书评

暂无评论

Journ.l of Moun.ain.Scien.e 2024年第4期21卷 1329-1344页

作者： DAn. ram Sharan.BAn.YA Chitra Bahadur Cen.ral Dep.rtmen. of Botan. Tribhuvan UniversityKirtipur 44618Nepal

Regen.ration.status of tree sp.cies alon. elevation.gradien. in.temp.rate hill forest was n.t un.erstood *** research examin.d the tree diversity an. its regen.ration.p.ttern. alon. an.elevation.gradien. in.temp.rate hill forest,cen.ral *** were collected from 300 samp.e p.ots within.vertical elevation.ban.s of 10,ran.in. from 1365 to 2450 m asl.A ran.om samp.in. method was used for data collection.in.three season.,win.er,p.e-mon.oon.an. p.st mon.oon.*** at breast height(DBH)was used to broadly categorize the p.an. in.ividual in.o trees,sap.in.s an. *** tree sp.cies richn.ss ran.ed from 12 to 25 with den.ity of 350 to 1200 in.ividuals p.r *** richn.ss of tree an. sap.in. showed statistically sign.fican. un.modal p.ttern.which p.aked at *** showed a stron. an. p.sitive lin.ar correlation.with the seedlin. den.ity(Devian.e=0.99,p.0.001)an. a sign.fican. hump.shap.d relation.hip.with sap.in. den.ity(Devian.e=0.95,p.0.001).Similarly,elevation. showed a statistically sign.fican. n.gative hump.shap.d relation.hip.with all trees,sap.in.s an. seedlin. stages(Devian.es=0.89,0.87 an. 0.57).The highest values of the Shan.on.Wien.r in.ex an. the lowest value of the Simp.on.in.ex were foun. at mid-elevation.for all growth *** 92%of tree sp.cies were foun. at regen.ratin. stage;49%in.a good ren.wal regen.ration.status,32%in.fair ren.wal regen.ration.an. 11%at a p.or regen.ratin. ***,4%of tree sp.cies were rep.rted as n.n.regen.ratin. stages an. 4%were n.wly in.roduced ***,the regen.ration.status of the study area was con.idered fairly well sin.e sap.in.(78.5%)>seedlin.(10.6%)≤mature(10.9%).Amon. tested en.iron.en.al variables,elevation.an. an.ual mean.rain.all were the most in.luen.ial factors in.the regen.ration.of tree sp.cies.

关键词： Regen.ration.p.ten.ial Chan.ragiri hill Altitudin.l gradien. Sp.cies diversity Tree sp.cies richn.ss

In.luen.e of cerium ion. on.structure-dep.n.en. magn.tic p.op.rties of Ba-Sr M-typ. hexaferrite n.n.crystals

在线全文

学校读者我要写书评

暂无评论

Journ.l of Rare Earths 2024年第2期42卷 364-372,I0005页

作者： ram A.p.war Sun.l M.p.tan.e p.M.Dighe Sher Sin.h Meen. Abdullah GAl-Sehemi Mehboobali p.n.ip.ra San.osh S.Jadhav Dep.rtmen. of p.ysics ArtsCommerce and Science CollegeAhmednagar413711MaharashtraIndia Dep.rtmen. of p.ysics Shri Krishna MahavidyalayaGunjotiDistOsmanabad413606MaharashtraIndia p.dmashri Vikhe p.til College of Arts Science and CommercePravaranagarA/P.Loni(Kd)Tal.RahataDistAhmednagar413713MaharashtraIndia Solid State p.ysics Division Bhabha Atomic Research CentreMumbai400085MaharashtraIndia Dep.rtmen. of Chemistry King Khalid UniversityAbha61413Saudi Arabia Dep.rtmen. of p.ysics D.S.M's ArtsCommerce and Science CollegeJintur431509MaharashtraIndia

The p.esen. study is a systematic effort to in.estigate the structure-sen.itive magn.tic p.rameters of Ce^(3+) substituted Ba-Sr hexaferrite n.n.crystals chemically formulated as Ba_(0.5)Sr_(0.5)Ce_(x)Fe_(12-x)O_(19) where x=0.0-0.2 with Δx=*** hexaferrite p.wders were p.ep.red usin. the sol-gel self-ign.tion.route an. structurally characterized by mean. of p.wder X-ray diffraction.an. Fourier tran.form in.rared *** creation.of the M-typ. hexaferrite p.ase within.the syn.hesized samp.es was revealed from the Rietveld refin.men. of the X-ray *** occurren.e of a secon.ary p.ase of CeO_(2) was revealed within.the hexaferrites for the substitution.x> *** refin.d X-ray diffraction.data were utilized to comp.te the lattice p.rameters,X-ray den.ity,an. lattice p.rameter *** crystal structure p.otted from the refin.d XRD data reveals the occup.n.y of the ion. at differen. lattice *** Xp. data of the hexaferrite were an.lyzed to con.irm the oxidation.states of the con.tituen. *** n.n.crystallin. n.ture of the hexaferrites was revealed from the crystallite sizes calculated usin. Scherer's *** an.lysis of FTIR sp.ctra con.irms that on.y a fraction.of Ce^(3+)accommodated in.the lattice an. the remain.n. Ce con.en. reside in.the form of the CeO_(2) *** morp.ology of the hexaferrites was an.lyzed from the FESEM p.ofiles of the ferrite *** magn.tic behavior study was p.rformed by an.lyzin. the Curie temp.rature,hysteresis loop.,an. hyp.rfin. in.eraction. by mean. of suscep.ibility,V.S.M,an. Mossbauer sp.ctroscop.,*** hexaferrites with in.reasin. coercivity,decreasin. saturation.magn.tization.an. decreasin. Curie temp.rature are rep.rted in.the *** substituted Ce^(3+)ion. in.ibit the grain.growth an. create lattice imp.rfection. givin. rise to hexaferrites with tun.d magn.tic p.rameters suitable for differen. ap.lication..

关键词： Ba-Sr hexaferrite Ce^(3+)substitution Xp. Saturation.magn.tization Coercivity M?ssbauer sp.ctroscop.

MicroRn.-630:A p.omisin. aven.e for alleviatin. in.lammation.in.diabetic kidn.y disease

在线全文

学校读者我要写书评

暂无评论

World Journ.l of Diabetes 2024年第7期15卷 1398-1403页

作者： Javier Don.te-Correa Ain.oa Gon.ález-Luis Jésica Díaz-Vera Juan.ramón.Hern.n.ez-Fern.ud Research Un.t University Hospital Nuestra Señora de Candelaria(UHNSC)Santa Cruz de Tenerife 38010Spain Dep.rtmen. of Biochemistry MicrobiologyCell Biology and GeneticsInstituto de Tecnologías BiomédicasUniversidad de La LagunaSanta Cruz de Tenerife 38000Spain

Diabetic kidn.y disease(DKD)is on. of the comp.ication. of diabetes,affectin. million. of p.op.e *** relen.less p.ogression.of this con.ition.can.lead to kidn.y failure,requirin. life-alterin. in.erven.ion. such as dialysis or *** eviden.e suggests that immun.logic an. in.lammatory elemen.s p.ay an.imp.rtan. role in.in.tiatin. an. p.rp.tuatin. the damage in.licted on.ren.l tissues,exacerbatin. the declin. in.organ.***-like recep.ors(TLRs)are a family of recep.ors that p.ay a role in.the activation.of the in.ate immun. system by the recogn.tion.of p.thogen.associated molecular *** data from in.vitro an. in.vivo studies have highlighted the critical role of TLRs,main.y TLR2 an. TLR4,in.the p.thogen.sis of *** the diabetic milieu,these TLRs recogn.ze diabetic-associated molecular sign.ls,triggerin. a p.oin.lammatory cascade that in.tiates an. p.rp.tuates in.lammation.an. fibrogen.sis in.the diabetic *** n.n.tradition.l strategies targetin. TLR sign.lin. with p.ten.ial therap.utic imp.ication. in.DKD have been.*** of these ap.roaches is the use of microRn.s,small n.n.codin. Rn.s that can.regulate gen. *** editorial commen.s on.the results of this ap.roach carried out in.a rat model of diabetes by Wu et al,p.blished in.this issue of the World Journ.l of *** results of the exp.rimen.al study by Wu et al shows that microRn.-630 decreased levels comp.red to n.n.diabetic ***,microRn.-630 exerted an.i-in.lammatory effects in.the kidn.ys of diabetic rats through the modulation.of *** fin.in.s in.icate that the microRn.-630/TLR4 axis might rep.esen. a p.thological mechan.sm of DKD an. a p.ten.ial therap.utic target cap.ble of curbin. the destructive in.lammation.characteristic of DKD.

关键词： Diabetes Diabetic kidn.y disease In.lammation Toll-like recep.or 4 microRn.-630

Stochastic Ran.in. Imp.oved Teachin.-Learn.n. an. Adap.ive Grasshop.er Op.imization.Algorithm-Based Clusterin. Scheme for Augmen.in. n.twork Lifetime in.WSn.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chin. Commun.cation. 2024年第9期21卷 159-178页

作者： n.Tamilarasan.SB Len.n.p.Mukun.han.n. Sen.hilkumar Dep.rtmen. of Electron.cs an. Commun.cation. En.in.erin. Sri Indu College of Engineering and TechnologyHyderabadTelanganaIndia Dep.rtmen. of Electron.cs an. Commun.cation. En.in.erin. Sri Manakula Vinayagar Engineering CollegePondicherryIndia

In.Wireless Sen.or n.tworks(WSn.),Clusterin. p.ocess is widely utilized for in.reasin. the lifesp.n.with sustain.d en.rgy stability durin. data *** clusterin. p.otocols were devised for exten.in. n.twork lifetime,but most of them failed in.han.lin. the p.oblem of fixed clusterin.,static roun.s,an. in.dequate Cluster Head(CH)selection.criteria which con.umes more *** this p.p.r,Stochastic Ran.in. Imp.oved Teachin.-Learn.n. an. Adap.ive Grasshop.er Op.imization.Algorithm(SRITL-AGOA)-based Clusterin. Scheme for en.rgy stabilization.an. exten.in. n.twork *** SRITL-AGOA selected CH dep.n.in. on.the weightage of factors such as n.de mobility degree,n.ighbour's den.ity distan.e to sin.,sin.le-hop.or multihop.commun.cation.an. Residual En.rgy(RE)that directly in.luen.es the en.rgy con.ump.ion.of sen.or *** sp.cific,Grasshop.er Op.imization.Algorithm(GOA)is imp.oved through tan.en.-based n.n.in.ar strategy for en.an.in. the ability of global *** the other han.,stochastic ran.in. an. violation.con.train. han.lin. strategies are embedded in.o Teachin.-Learn.n.-based Op.imization.Algorithm(TLOA)for imp.ovin. its exp.oitation.***,SR an. VCH imp.oved TLOA is embedded in.o the exp.oitation.p.ase of AGOA for selectin. better CH by main.ain.n. better balan.e amid exp.oration.an. *** results con.irmed that the p.op.sed SRITL-AGOA imp.oved throughp.t by 21.86%,n.twork stability by 18.94%,load balan.in. by 16.14%with min.mized en.rgy dep.etion.by19.21%,comp.red to the comp.titive CH selection.ap.roaches.

关键词： Adap.ive Grasshop.er Op.imization.Algorithm(AGOA) Cluster Head(CH) n.twork lifetime Teachin.-Learn.n.-based Op.imization.Algorithm(TLOA) Wireless Sen.or n.tworks(WSn.)

Calibration.of the DEM slidin. friction.an. rollin. friction.p.rameters of a cohesion.ess bulk material

在线全文

学校读者我要写书评

暂无评论

p.rticuology 2024年第9期92卷 126-139页

作者： Jon.tan.Marín.p.rez Tugrul Comlekci Yevgen.Gorash Don.ld MacKen.ie Un.versity of Strathclyde 75 Montrose StreetG11XJGlasgowUnited Kingdom

The discrete elemen. method(DEM)has become a valuable tool for un.erstan.in. the mechan.cal behaviour of gran.lar assemblies,however,the accuracy of the DEM simulation. dep.n.s on.several in.eraction.p.rameters such as the slidin. friction.an. rollin. friction.***,these p.rameters are estimated usin. bulk calibration.ap.roach(BCA)where the draw down.test has been.suggested as an.effective way to ap.roach these *** test p.ovides up.to four bulk criteria,the an.le of rep.se,shear an.le,mass flow rate an. the mass loss which are used to n.rrow down.the p.ssible ***,there is still more research n.eded aroun. it to fully un.erstan. how this methodology *** exp.rimen.al an. n.merical study was carried out usin. the draw down.test to assess the in.luen.e of differen. mass flow rates an. p.rticle shap.s on.DEM p.rameters for a cohesion.ess bulk *** is con.luded that use of multi-sp.ere p.rticles an. three ap.rture sizes in.the draw down.test to calibrate the slidin. an. rollin. friction.p.rameters of a cohesion.ess bulk material can.con.erge to a small feasible region.in.which a sin.le combin.tion.of the friction.coefficien.s can.be *** calibrated slidin. an. rollin. friction.coefficien.s were validated usin. multi-sp.ere p.rticles,where the maximum deviation.was 5.9%from the exp.rimen.al values.

关键词： Discrete elemen. method Calibration Draw down Slidin. friction Rollin. friction p.rticle shap.