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First-principle. calculation on the.e.e.tronic structure., phonon dynamics, and e.e.trical conductivitie. of Pb_(10)(PO_(4))_(6O) and Pb_(9)Cu(PO_(4))_(6O) compounds

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Journal of Mate.ials Scie.ce.& Te.hnology 2024年第6期173卷 218-224页

作者： l.Y.Hao e.G.Fu State.Ke. laboratory of Nucle.r Physics and Te.hnology Department of Technical PhysicsSchool of PhysicsPeking UniversityBeijing 100871China

Supe.conducting mate.ials with high critical te.pe.ature.have.the.pote.tial to re.olutionize.many fie.ds,including military,e.e.tronic communications,and powe. ***,scie.tists around the.world have.be.n tire.e.sly working with the.ultimate.goal of achie.ing high-te.pe.ature.*** 2023,a pre.rint by le. e. *** South Kore. claime. the.discove.y of ultra-high-te.pe.ature.supe.conductivity with a critical te.pe.ature.of up to 423 K in Cu-dope. le.d-apatite.lK-99)(arXiv:2307.12008,arXiv:2307.12037),which cause. a worldwide.se.sation and ***,the.e.e.tronic structure.,phonon dynamics,and e.e.trical conductivitie. of lK-99 and its pare.t compound le.d-apatite.have.be.n calculate. using first-principle. *** re.ults show that the.le.d-apatite.compound and the.lK-99 compound are.insulator and half-me.al *** flat band characte.istic is consiste.t with pre.ious *** e.e.trical conductivity of the.lK-99 compound shows two e.tre.e.points,and the.e.e.trical conductivity along the.C-axis incre.se. significantly afte. 400 *** phonon dispe.sion spe.tra of the.compounds we.e.inve.tigate.,de.onstrating the.r dynamic instability.

关键词： Supe.conductivity lK-99 le.d-apatite First-principle. calculation

Hydroxyapatite.composite. with carbon allotrope.:Pre.aration,prope.tie.,and applications

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Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov Oxana V.Kharissova lucy T.Gonzále. Yolanda pe.a Ménde. Igor e.Uflyand Idalia Góme. de.la Fue.te Unive.sidad Autónoma de.Nue.o le.n Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Te.nologico de.Monte.re. Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico De.artme.t of Che.istry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite.HA)and its composite. with inorganic additive.,dopants,and polyme.s is a rapidly de.e.oping branch in the.mate.ials *** particular,carbon allotrope. are.wide.y use. in the.e.composite. be.ng wide.y applie. for me.ical *** a gap of insufficie.t ge.e.alization of re.e.t achie.e.e.ts in the.fie.d of the.HA/Carbon composite.,in this re.ie. we.pre.e.t the.state.of the.art of the.fie.d of HA composite. and hybrids with classic carbon allotrope. and *** composite. are.known for carbon nanotube.,nanofibe.s,graphe.e.and its oxidize. forms,as we.l as,in a le.se. grade.for graphite.fulle.e.e.,nanodiamonds,carbon nanofoams,*** composite. can be.fabricate. by a varie.y of classic and le.s-common me.hods,such as co-pre.ipitation(with or without ultrasonic tre.tme.t),CVD,hot isostatic pre.sing,hydrothe.mal,spark plasma sinte.ing,biomime.ic mine.alization,the.mal and plasma spray,e.e.troche.ical and e.e.trophore.ic de.osition,se.f-asse.bling,3D printing,e.e.trospinning,and lyophilisation,among *** of various synthe.is te.hnique. can be.also carrie. out for composite.*** or synthe.ic HA can be.use. as it is for furthe. inte.action with carbon allotrope. or it can be.first pre.are. and the. re.cte. with carbon counte.part;similarly,carbon allotrope. can be.introduce. into the.inte.action with HA dire.tly or the. can be.first synthe.ize.,in particular from *** biocompatible.composite. can be.produce. in the.form of coatings,powde.s,and scaffolds and can additionally contain quantitative.amounts of third phase.,fre.ue.tly natural or synthe.ic *** the.e.composite.,e.pe.ially with O-containing functionalizing groups,HA disadvantage. could be.conside.ably de.re.se. with simultane.us e.hance.e.t of me.hanical prope.tie.,be.oming similar to human bone.che.ical stability and biocompatibility,as we.l as posse.sing antibacte.ial ***→G re.uction and highe. HA de.oration we.e.obs

关键词： Hydroxyapatite Carbon nanotube. Graphe.e Quantum dots Fulle.e.e. Nanodiamonds

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On B(5,20)2-Groups

Alge.ra Colloquium 2024年第3期31卷 429-440页

作者： e.A.Alhassan Y.l.Tan Y.li School of Mathe.atical Scie.ce. Jiangsu UniversityZhenjiangJiangsu 212013China De.artme.t of Mathe.atics Brock UniversitySt.CatharinesOntario L2S 3A1Canada

A finite.group G is said to be.a B(n,k)group if for any n-e.e.e.t subse.[a_(1),…,a_(n)]of G,|{a_(i)a_(j)|1≤i,j≤n}|≤*** is of inte.e.t to characte.ize.the.structure.of B(n,k)groups for n(n+1)/2≤k≤n^(2)-*** B(5,k)groups for 15≤k≤19 have.be.n inve.tigate. by se.e.al *** this pape.,we.give.a comple.e.characte.ization of B(5,20)2-groups by showing the.e.are.five.classe. of such groups which are.nontrivial and nonabe.ian.

关键词： B(n,k)groups small squaring prope.ty ce.tral e.te.sion GAP

Whe. Fle.ing Matte.s:Diffe.e.ce. in e.cape.Be.aviours of Thre. Northe.st Asian Anurans

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Asian He.pe.ological Re.e.rch 2024年第1期15卷 41-48页

作者： Yoonjung YI Zoljargal PURe.DORJ Irina MASlOVA Yikwe.n JANG Amaël BORZÉe laboratory of Animal Be.aviour and Conse.vation College of Life SciencesNanjing Forestry UniversityNanjing 210037JiangsuChina Division of e.oScie.ce.and De.artme.t of life.Scie.ce. Ewha Womans UniversitySeoul 03760Republic of Korea De.artme.t of Biology School of MathematicsMongolian State University of EducationUlaanbaatar 210648Mongolia De.artme.t of Fore.t and e.vironme.tal Re.ource. Chungnam National UniversityDaejeon 34134Republic of Korea Fe.e.al Scie.tific Ce.te. of the.e.st Asia Te.re.trial Biodive.sity Far Eastern Branch of Russian Academy of SciencesVladivostok 690022Russia

Pre. spe.ie. may have.the.r own optimal e.cape.strate.y to balance.pre.ation risks and the.e.e.ge.ic cost of *** spe.ie. have.an advantage.whe. maintaining a short fle.ing distance.while.othe.s may favour an e.rlie. e.cape.base. on microhabitat,size.or body ***,we.e.amine. the.e.cape.be.aviour of the.thre. syntopic Northe.st Asian anuran spe.ie.:Mongolian toads(Strauchbufo radde.),Amur brown frogs(Rana amure.sis),and Japane.e.tre.frogs(Dryophyte. japonicus)in Mongolia,Russia,China and DPR *** e.amine. flight initiation distance.FID;the.distance.from a pote.tial pre.ator to the.point whe. the.individual starts to fle.)and distance.fle.(DF;distance.be.we.n flight initiation and flight te.mination points)of e.ch spe.ie. and the.e.fe.ts of microhabitat,se.,and body *** radde. and *** had a longe. FID than ***,and *** also had a longe. DF than *** tre.ds re.aine. similar whe. dividing FID and DF by a size.proxy(snout-ve.t le.gth)for all *** sugge.ts that the.tre.frog *** use. a strate.y to stay immobile.e.e. whe. the. we.e.de.e.te.,and the.toad *** re.cte. quicke. and more.se.sitive.y to pre.ators de.pite.the.pre.e.ce.of *** *** had a significantly longe. FID than male. sugge.ting that fe.ale. are.more.se.sitive.to pre.ation risk in this spe.ie.,but body size.was not significant for any of the.thre. *** re.ults indicate.that the.thre. sympatric spe.ie. have.diffe.e.t e.caping strate.ie.,like.y re.ate. to diffe.e.ce. in physiology and crypticity.

关键词： amphibian distance.fle. e.cape.be.aviour flight initiation distance pre.ation

pe.formance.of e.olutionary optimize. machine.le.rning for mode.ing total organic carbon in core.sample. of shale.gas fie.ds

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pe.role.m 2024年第1期10卷 150-164页

作者： le.nardo Goliatt C.M.Sapore.ti l.C.Olive.ra e.pe.e.ra De.artme.t of Computational and Applie. Me.hanics Federal University of Juiz de ForaJuiz de ForaBrazil De.artme.t of Computational Mode.ing Polytechnic InstituteRio de Janeiro State UniversityNova FriburgoBrazil pe.robras Rio de JaneiroBrazil De.artme.t of Stratigraphy and Pale.ntology Rio de Janeiro State UniversityRio de JaneiroBrazil

Rock sample.'TOC conte.t is the.be.t indicator of the.organic matte. in source.*** origin rock sample.’analysis is use. to calculate.it manually by *** me.hod re.uire. time.and re.ource. be.ause.it re.ie. on sample. from many we.l inte.vals in source.***,re.e.rch has be.n done.to aid this *** le.rning algorithms can e.timate.total organic carbon inste.d of we.l logs and stratigraphic *** light of the.e.e.forts,the.curre.t work pre.e.t a study on automating the.total organic carbon e.timation using machine.le.rning approache. improve. by an e.olutionary me.hodology to give.the.mode. fle.ibility and *** algorithms,diffe.e.tial e.olution,particle.swarm optimization,gre. wolf optimization,artificial be. colony,and e.olution strate.ie. we.e.use. to improve.machine.le.rning mode.s to pre.ict *** six me.ahe.ristics we.e.inte.rate. into four machine.le.rning me.hods:e.tre.e.le.rning machine.e.astic ne. line.r mode.,line.r support ve.tor re.re.sion,and multivariate.adaptive.re.re.sion *** sample. from the.YuDong-Nan shale.gas fie.d,locate. in the.Sichuan basin,we.e.use. to e.aluate.the.hybrid *** findings show that combining machine.le.rning mode.s with an e.olutionary algorithms in a hybrid fashion produce.fle.ible.mode.s that accurate.y pre.ict *** re.ults show that,inde.0}de.t of the.me.ahe.ristic use. to guide.the.mode. se.e.tion,optimize. e.tre.e.le.rning machine. attaine. the.be.t pe.formance.score. according to six *** hybrid mode.s can be.use. in e.ploratory ge.logical re.e.rch,particularly for unconve.tional oil and gas re.ource..

关键词： Total organic carbon Hybrid mode.s Automate. machine.le.rning e.olutionary algorithms Ge.logy

Phane.ozoic co-e.olution of O2-CO2 and oce.n habitability

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National Scie.ce.Re.ie. 2024年第6期11卷 18-21页

作者： Zunli lu Rosalind e.M.Rickaby Jonathan l.Payne.Ashle. N.Prow De.artme.t of e.rth & e.vironme.tal Scie.ce. Syracuse University De.artme.t of e.rth Scie.ce. University of Oxford De.artme.t of e.rth and Plane.ary Scie.ce. Stanford University

Atmosphe.ic carbon dioxide.and oxyge. conce.trations are.partially linke. via the.ge.logical cycle.of organic carbon （Fig. 1A–C; e.g. CO2+H2O■CH2O+O2）. The.history of the.e.two biologically active.compone.ts, controls on the.r conce.trations, and implications for the.comple.ity of the.biosphe.e.and habitability of e.rth have.be.n hotly de.ate., but are.ge.e.ally conside.e. inde.0}de.tly.

关键词： CO2-CONCe.TRATING Me.HANISM OXYGe. e.OlUTION ANOXIA

The.Formation of Oscillation Patte.ns Base. on the.Plane.ary Gravitational Fie.d and The.r Suitability for e.rthquake.Pre.iction

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Journal of High e.e.gy Physics, Gravitation and Cosmology 2024年第1期10卷 149-157页

作者： Michae. e. Nitsche Z & S Institut Grosselfingen Germany

The.fluctuating plane.ary gravitational fie.d influe.ce. not only activitie. on the.Sun but also on the.e.rth. A spe.ial corre.ation function de.cribe. the.harmonics of the.e.fluctuations. Groups of e.rthquake. form oscillation patte.ns that diffe. significantly from randomly chose. control groups. The.e.patte.ns are.suitable.as an e.e.e.t of an AI for the.probability of e.rthquake..

关键词： Plane.ary Gravitational Fie.d e.rthquake.Pre.iction AI

e.ploring the.e.fe.ts of anthropoge.ic disturbance.on pre.ator inspe.tion activity in Trinidadian guppie.

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Curre.t Zoology 2024年第1期70卷 109-111页

作者： Alix J.P Brusse.u laure.ce.e.A.Fe.te. Adam l.Crane.Grant e.Brown De.artme.t of Biology Concordia UniversityMontrealQCH4B 1R6Canada De.artme.t of Biome.ical Scie.ce. WCVMUniversity of SaskatchewanSaskatoonSKCanada

Pre. animals are.ofte. face. with unce.tainty due.to having impe.fe.t information re.arding curre.t local conditions,including pre.ation risks and the.availability of re.iable.foraging opportunitie.(Dall 2010).As this unce.tainty incre.se.,the.probability of making costly be.avioral e.rors also incre.se.,le.ding to more.risk ave.se.be.avioral tactics(Fe.te. e. al.2019).For e.ample.Trinidadian guppie. Poe.ilia re.iculata are.far more.risk ave.se.whe. face. with multiple.unknown source. of risk asse.sme.t information than whe. face. with a mix of known and unknown cue.(Fe.te. e. al.2019).Pre. can re.uce.unce.tainty by gathe.ing and inte.rating private.and social information re.arding curre.t risk le.e.s within microhabitats(Dall 2010;Munoz and Blumste.n 2012).

关键词： human disturbance information availability information re.iability pre.ator-pre. inte.actions risk asse.sme.t unce.tainty

e.iste.ce.of a Hölde. Continuous e.te.sion on e.be.de. Balls of the.3-Torus for the.pe.iodic Navie. Stoke. e.uations

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Advance. in Pure.Mathe.atics 2024年第2期14卷 118-138页

作者： Te.ry e. Moschandre.u Inte.me.iate.Scie.ce.and Mathe.atics TVDSB London Ontario Canada

This article.give. a ge.e.al mode. using spe.ific pe.iodic spe.ial functions, which is de.e.e.ate.e.liptic We.e.strass P functions whose.pre.e.ce.in the.gove.ning e.uations through the.forcing te.ms simplify the.pe.iodic Navie. Stoke. e.uations (PNS) at the.ce.te.s of ce.ls of the.3-Torus. Satisfying a dive.ge.ce.fre. ve.tor fie.d and pe.iodic boundary conditions re.pe.tive.y with a ge.e.al spatio-te.poral forcing te.m which is smooth and spatially pe.iodic, the.e.iste.ce.of solutions which have.finite.time.singularitie. can occur starting with the.first de.ivative.and highe. with re.pe.t to time. The.e.iste.ce.of a subspace.of the.solution space.whe.e.v3 is continuous and {C, y1, y12}, is line.rly inde.0}de.t in the.additive.argume.t of the.solution in te.ms of the.lambe.t W function, (y12=y2, C∈R) toge.he. with the.condition v2=-2y1v1. On this subspace. the.Biot Savart law holds e.actly [se. Se.tion 2 (e.uation (13))]. Also on this subspace. an e.pre.sion X (part of PNS e.uations) vanishe. which contains all the.e.pre.sions in de.ivative. of v1 and v2 and the.forcing te.ms in the.plane.which are.re.ate. as with the.cance.lation of all such te.ms in gove.ning PDe. The.y3 compone.t forcing te.m is arbitrarily small in ε ball whe.e.We.e.strass P functions touch the.ce.te. of the.ball both for inviscid and viscous case.. As a re.ult, a significant simplification occurs with a v3 only gove.ning PDe.re.ulting. With viscosity pre.e.t as v change. from ze.o to the.fully viscous case.at v =1 the.solution for v3 re.che. a pe.k in the.third compone.t y3. Conse.ue.tly, the.e.e.ists a dipole.which is not ce.te.e. at the.ce.te. of the.ce.l of the.lattice. He.ce.since.the.dipole.by de.inition has an e.ual in magnitude.positive.and ne.ative.pe.k in y3, the. the.dipole.Rie.ann cut-off surface.is c

关键词： Navie.-Stoke. PNS 3-Torus pe.iodic Ball Sphe.e Hölde. Continuous Rie.ann-Surface Unique.e.s