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Multi.uncti.nal HDPE/Cu bi.ci.al nanocomposi.es for MEX addi.i.e manufactured parts: Perspecti.es for the defense i.dustry

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Defence Technology（防务技术） 2024年第8期38卷 16-32页

作者： Nectari.s Vi.ak.0} Ni.olaos Mi.hai.i.i. Mark.s Petousi. Nek.ari.s k.Nasi.as Vassi.i.s Saltas Vassi.i. Papadak.0} Ni.olaos Mountak.0} Apostolos argyros Mari.a Spi.i.ak.0}i.anni. Valsamos Department of Mechani.al Engi.eeri.g Hellenic Mediterranean UniversityHeraklion 71410Greece Physi.al Metallurgy Laboratory Mechanical Engineering DepartmentSchool of EngineeringAristotle University of ThessalonikiThessaloniki 54124Greece Centre for Research&Development of Advanced Materi.ls(CERDAM) Center for Interdisciplinary Research and InnovationBalkan CentreThessaloniki 57001Greece Di.i.i.n of Mathemati.s and Engi.eeri.g Sci.nces Department of Military SciencesHellenic Army AcademyVari GR16673AtticaGreece Department of Electroni. Engi.eeri.g Hellenic Mediterranean UniversityChania 73133Greece Department of i.dustri.l Desi.n and Producti.n Engi.eeri.g University of West AtticaAthens 12244Greece i.sti.ute of Electroni. Structure and Laser Foundation for Research and Technology-HellasHeraklion 70013Greece

i. thi. study, we i.vesti.ated the performance i.provement caused by the addi.i.n of copper(Cu)nanoparti.les to hi.h-densi.y polyethylene(HDPE) matri. materi.l. Composi.e materi.ls, wi.h fi.ler percentages of 0.0, 2.0, 4.0, 6.0, 8.0, and 10.0 wt% were synthesi.ed through the materi.l extrusi.n(MEX)3D pri.ti.g techni.ue. The synthesi.ed nanocomposi.e fi.aments were uti.i.ed for the manufacturi.g of speci.ens sui.able for the experi.ental procedure that followed. Hence, we were able to systemati.ally i.vesti.ate thei. tensi.e, flexural, i.pact, and mi.rohardness properti.s through vari.us mechani.al tests that were conducted accordi.g to the correspondi.g standards. Broadband Di.lectri. Spectroscopy was used to i.vesti.ate the electri.al/di.lectri. properti.s of the composi.es. Moreover, by employi.g means of Raman spectroscopy and thermogravi.etri. analysi.(TGA) we were also able to further i.vesti.ate thei. vi.rati.nal, structural, and thermal properti.s. Concomi.antly, means of scanni.g electron mi.roscopy(SEM), as well as atomi. force mi.roscopy(AFM), were used for the exami.ati.n of the morphologi.al and structural characteri.ti.s of the synthesi.ed speci.ens, whi.e energy-di.persi.e Xray spectroscopy(EDS) was also performed i. order to recei.e a more detai.ed pi.ture on the structural characteri.ti.s of the vari.us synthesi.ed composi.es. The correspondi.g nanomateri.ls were also assessed for thei. anti.acteri.l properti.s regardi.g Staphylococcus aureus(S. aureus) and Escheri.hi. coli.E. coli. wi.h the assi.tance of a method named screeni.g agar well di.fusi.n. The results showed that the mechani.al properti.s of HDPE benefi.ed from the uti.i.ati.n of Cu as a fi.ler, as they showed a notable i.provement. The speci.en of HDPE/Cu 4.0 wt% was the one that presented the hi.hest levels of rei.forcement i. four out of the seven tested mechani.al properti.s(for example, i. exhi.i.ed a 36.7%i.provement i. the flexural strength, compared to the pure matri.). At the same

关键词： Hi.h-densi.y polyethylene(HDPE) Copper(Cu) Materi.l extrusi.n(MEX) Mechani.al performance Electri.al properti.s Anti.acteri.l Defense and securi.y

Near resonance vi.rati.n i.olati.n on a levered-dual response(LEDAR)Coulomb-damped system by di.ferenti.l preloads/offsets i. li.ear spri.gs

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Appli.d Mathemati.s and Mechani.s(Engli.h Edi.i.n) 2024年第6期45卷 1033-1050页

作者： T.i.TOLUWALOJU C.k.THEi. D.HALi. Department of Mechani.al Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100Zhejiang ProvinceChina Notti.gham Ni.gbo Chi.a Beacons of Excellence Research and i.novati.n i.sti.ute University of Nottingham Ningbo ChinaNingbo 315048Zhejiang ProvinceChina

The levered-dual response(LEDAR)Coulomb-damped system attai.s near resonant vi.rati.n i.olati.n by di.ferenti.l preloads/offsets i. li.ear *** tak.s the advantages of both the preloads/offsets i. li.ear spri.gs and the gui.erai. fri.ti.n for reali.i.g di.ferent levels of vi.rati.n *** i.olati.n capaci.i.s are i.vesti.ated on the strategi.s wi.h both the hori.ontal and verti.al gui.erai.s,wi.h the hori.ontal rai. only,and wi.hout *** compressi.e preloads generally result i. the consumpti.n of most of the i.i.i.l exci.ati.n energy so as to overcome the potenti.l *** i.olati.n onsets at the frequency rati. of 1∓0.095 on the left-hand si.e(LHS)and the ri.ht-hand si.e(RHS)of the lever are relati.e to the load plate *** observed near resonant i.olati.n thus mak.s the LEDAR system a candi.ate for the i.olati.n of the mechani.al systems about resonance whi.e openi.g a path for si.ultaneous harvesteri.olati.n functi.ns and passi.e functi.ns at extreme frequenci.s.

关键词： lever rati. Coulomb dampi.g preload tensi.n/compressi.n i.olati.n band/depth offset potenti.l

Li.AR-based esti.ati.n of boundi.g box coordi.ates usi.g Gaussi.n process regressi.n and parti.le swarm opti.i.ati.n

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Bi.mi.eti. i.telli.ence & Roboti.s 2024年第1期4卷 24-35页

作者： Vi.odha k. E.S.Gopi.Tushar Agni.hoj Department of Electroni.s and Communi.ati.n Engi.eeri.g National Institute of Technology TiruchirappalliTamil Nadu620015India

Camera-based object track.0}g systems i. a gi.en closed envi.onment lack.pri.acy and *** thi. study,li.ht detecti.n and rangi.g(Li.AR)was appli.d to track.objects si.i.ar to the camera track.0}g i. a closed envi.onment,guaranteei.g pri.acy and *** pri.ary objecti.e was to demonstrate the effi.acy of the proposed techni.ue through carefully desi.ned experi.ents conducted usi.g two *** Scenari. i.the study i.lustrates the capabi.i.y of the proposed techni.ue to detect the locati.ns of multi.le objects posi.i.ned on a flat surface,achi.ved by analyzi.g Li.AR data collected from several locati.ns wi.hi. the closed *** i. demonstrates the effecti.eness of the proposed techni.ue i. detecti.g multi.le objects usi.g Li.AR data obtai.ed from a si.gle,fi.ed ***-ti.e experi.ents are conducted wi.h human subjects navi.ati.g predefi.ed *** i.di.i.uals move wi.hi. an envi.onment,whi.e Li.AR,fi.ed at the center,dynami.ally track. and i.enti.i.s thei. locati.ns at multi.le *** demonstrate that a si.gle,strategi.ally posi.i.ned Li.AR can adeptly detect objects i. moti.n around ***,thi. study provi.es a compari.on of vari.us regressi.n techni.ues for predi.ti.g boundi.g box *** process regressi.n(GPR),combi.ed wi.h parti.le swarm opti.i.ati.n(PSO)for predi.ti.n,achi.ves the lowest predi.ti.n mean square error of all the regressi.n techni.ues exami.ed at *** tuni.g of GPR usi.g PSO si.ni.i.antly mi.i.i.es the regressi.n *** of the experi.ent pave the way for i.s extensi.n to vari.us real-ti.e appli.ati.ns such as crowd management i. malls,survei.lance systems,and vari.us i.ternet of Thi.gs scenari.s.

关键词： Li.AR Data acqui.i.i.n Boundi.g box Gaussi.n process regressi.n Parti.le swarm opti.i.ati.n(PSO)

A new route to weak.force sensi.g beyond SQL: Squeezed magnons i. cavi.y magnomechani.s

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Sci.nce Chi.a(Physi.s,Mechani.s & Astronomy) 2024年第10期Mechanics & Astronomy) .卷 170-171页

作者： ?.k.?zdemi. Department of Engi.eeri.g Sci.nce and Mechani.s and Materials Research Institute (MRI)The Pennsylvania State University

Quantum mechani.s i.poses li.i.s on measurement accuracy through quantum noi.e whi.h typi.ally has two components: Fi.st i. the shot noi.e ori.i.ati.g from vacuum fluctuati.ns and referred to as the i.preci.i.n noi.e. Second i. the quantum back.cti.n ori.i.ati.g from the “acti.n” of the measurement back.on the object bei.g measured.

关键词：

Understandi.g the Theory of k.rp, Mi.ler and Wi.ograd

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Journal of Appli.d Mathemati.s and Physi.s 2024年第4期12卷 1203-1236页

作者： Athanasi.s i. Margari. Department of Di.i.al Systems Gaiopolis Campus University of Thessaly Larissa Greece

The objecti.e of thi. tutori.l i. to present the fundamental theory of k.rp, Mi.ler and Wi.ograd, whose semi.al paper lai. the foundati.ns regardi.g the systemati. descri.ti.n of the organi.ati.n of computati.ns i. systems of uni.orm recurrent equati.ns by means of graph structures, vi. the defi.i.i.n of computabi.i.y condi.i.ns and techni.ues for the constructi.n of one-di.ensi.nal and multi.di.ensi.nal scheduli.g functi.ns. Besi.es the descri.ti.n of thi. theory, the paper presents i.provements and revi.i.ns made by other authors and furthermore, poi.ts out the di.ferences regardi.g the condi.i.ns of causali.y and dependency between the general case of systems of recurrent equati.ns and the speci.l case of multi.le nested loops.

关键词： Computabi.i.y Scheduli.g Computati.ns Recurrent Equati.ns

Sparse i.enti.i.ati.n-assi.ted explorati.n of the atomi.-scale deformati.n mechani.m i. multi.hase CoCrFeNi.hi.h-entropy alloys

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Sci.nce Chi.a(Technologi.al Sci.nces) 2024年第4期67卷 1124-1132页

作者： Xi.O Lu GUO Xi.oXi.ng SUN YuTong WANG Gang LONG Wei.i. Li.W Peter k. REN Ji.gLi School of Mathemati.s and Stati.ti.s Zhengzhou UniversityZhengzhou 450001China Academy of Mathemati.s and Systems Sci.nce Chinese Academy of SciencesBeijing 100190China i.sti.ute of Materi.ls Shanghai UniversityShanghai 200444China Sk. of Advanced Brazi.g Metals&Technology Zhengzhou Research Institute of Mechanical EngineeringZhengzhou 450001China Department of Materi.ls Sci.nce and Engi.eeri.g The University of TennesseeKnoxvilleTN 37996USA

Thi. study i.vesti.ated the atomi.-scale deformati.n mechani.m of multi.hase CoCrFeNi.hi.h-entropy alloys(HEAs)at li.ui. heli.m,li.ui. ni.rogen,and room temperatures.A mi.li.n-atom multi.hase HEA was prepared usi.g molecular dynami.s si.ulati.n i.volvi.g melt and quench *** HEA exhi.i.ed hi.h-densi.y di.locati.ns and some twi.s,consi.tent wi.h experi.ental *** analysi. revealed an i.consi.tent evoluti.n of the mi.rostructure under tensi.e *** parti.ular,the elasti. and i.i.i.l plasti. stages exhi.i.ed an i.crease i. the di.ordered structure at the expense of the face-centered cubi. and hexagonal close-pack.d structures,followed by a subsequent transformati.n i.volvi.g multi.le structural ***,through sparse i.enti.i.ati.n,a model depi.ti.g mi.rostructural evoluti.n duri.g tensi.n was extracted for the CoCrFeNi.HEA at three typi.al temperatures and three tensi.e *** model hi.hli.hted the i.portance of the body-centered cubi. structure i. the evoluti.nary process.

关键词： hi.h-entropy alloy data-dri.en method mi.rostructure evoluti.n multi.hase structure molecular dynami.s si.ulati.n

Effect of Ta_(2)O_(5)nanoparti.les on bi.acti.i.y,composi.i.n,structure,i. vi.ro and i. vi.o behavi.r of PEO coati.gs on Mg-alloy

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Journal of Magnesi.m and Alloys 2024年第6期12卷 2360-2379页

作者： D.V.Mashtalyar i.M.i.shi.etsk.0} V.V.k.shepa k.V.Nadarai. M.A.Pi.tk.va A.i.Pleshk.va k.A.Fomenk. A.Yu.Usti.ov S.L.Si.ebryuk.ov S.V.Gnedenk.v i.sti.ute of Chemi.try Far Eastern BranchRussian Academy of SciencesVladivostok690022Russia Far Eastern Federal Uni.ersi.y Vladivostok690950Russia Regi.nal Cli.i.al Dermatovenerologi.al Di.pensary Vladivostok690033Russia

The present study i.vesti.ates the physi.al and chemi.al characteri.ti.s,behavi.r i. vi.ro and i. vi.o,and bi.compati.i.i.y of coati.gs contai.i.g Ta_(2)O_(5),whi.h are obtai.ed by plasma electrolyti. oxi.ati.n(PEO)on MA8 magnesi.m *** obtai.ed coati.gs demonstrate i. vi.o bi.compati.i.i.y and i. vi.ro *** to the base PEO coati.g,the layers contai.i.g Ta_(2)O_(5)faci.i.ate the development of apati.e i. si.ulated body flui.,suggesti.g that the i.clusi.n of nanoparti.les i.proves bi.acti.i.y of the *** was found that i.corporati.n of Ta_(2)O_(5)nanoparti.les i.creases roughness and porosi.y of the formed layers by i.creasi.g parti.le concentrati.n i. electrolytes for the PEO process contri.uti.g to suffi.i.nt soft ti.sue i.growth i. *** on i. vi.o studi.s,these coati.gs also provi.e favorable ti.sue response and mi.i.al i.flammatory reacti.n i. compari.on wi.h the bare magnesi.m alloy due to protecti.n of li.i.g ti.sues from deleteri.us corrosi.n events of magnesi.m i.plant such as local alk.li.ati.n and i.tense hydrogen *** results obtai.ed i. the present study concluded bi.compati.i.i.y,ti.sue i.tegrati.n of the PEO coati.gs contai.i.g Ta_(2)O_(5)nanoparti.les mak.0}g them a promi.i.g protecti.e layer for bi.degradable magnesi.m i.plants.

关键词： Plasma electrolyti. oxi.ati.n Bi.acti.e coati.gs Tantalum pentoxi.e Si.ulated body flui.(SBF) Apati.e formati.n Hi.tology

Comparati.e analysi. of jet and underlyi.g event properti.s across vari.us models as a functi.n of charged parti.le multi.li.i.y at 7 TeV

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Chi.ese Physi.s C 2024年第9期48卷 118-125页

作者： Maryam Waqar Hai.a i.Alrebdi.Muhammad Waqas k.S.Al-mugren Muhammad Ajaz Department of Physi.s Abdul Wali Khan University MardanMardan 23200Pakistan Department of Physi.s College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia School of Nuclear Sci.nce and Technology University of Chinese Academy of SciencesBeijing 100049China

i. thi. study,a comprehensi.e analysi. of jets and underlyi.g events as a functi.n of charged parti.le multi.li.i.y i. proton-proton(pp)colli.i.ns at a center-of-mass energy of √s=7 TeV i. *** Monte Carlo(MC)event generators,i.cludi.g Pythi.8.308,EPOS 1.99,EPOSLHC,EPOS4_(Hydro),and EPOS4_(noHydro),are employed to predi.t parti.le *** predi.ti.ns from these models are compared wi.h experi.ental data from the CMS *** charged parti.les are categori.ed i.to those associ.ted wi.h underlyi.g events and those li.k.d to jets,and the analysi. i. restri.ted to charged parti.les wi.h|η|0.25 GeV/*** compari.g the MC predi.ti.ns wi.h CMS data,we fi.d that EPOS4_(Hydro),EPOSLHC,and Pythi.8 consi.tently reproduce the experi.ental results for all charged parti.les,underlyi.g events,i.trajets,and leadi.g charged *** charged jet rates wi.h p_T^(***)>5 GeV/c,EPOS4_(Hydro)and Pythi.8 perform excepti.nally *** the case of charged jet rates wi.h p_T^(***)→30 GeV/c,EPOSLHC reproduces sati.factori.y good results,whereas EPOS4 Hydro exhi.i.s good agreement wi.h the data at hi.her charged parti.le multi.li.i.i.s compared to the other *** can be attri.uted to the conversi.n of energy i.to flow when"Hydro=on"leadi.g to an i.crease i. *** EPOSLHC model descri.es the data better owi.g to the new collecti.e flow effects,correlated flow treatment,and parameteri.ati.n compared to EPOS ***,the exami.ati.n of the jet p_T spectrum and normali.ed charged p_T densi.y reveals that EPOS4_(Hydro),EPOS4_(noHydro),and EPOSLHC exhi.i. good agreement wi.h the experi.ental results,whereas Pythi.8 and EPOS 1.99 do not perform as well owi.g to the lack.of correlated flow treatment.

关键词： Monte Carlo models underlyi.g event jets charged parti.le multi.li.i.y

Hi.hli.hti.g relati.nshi.s between sand thi.k.esses,reservoi.-seal pai.s and paleobathymetry from a sequence strati.raphi. perspecti.e:An example from Tortoni.n Serravalli.n deposi.s,onshore Ni.er Delta Basi.

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Energy Geosci.nce 2024年第1期5卷 12-23页

作者： i.eanyi.huk.u S.Obi.k.Mosto Onuoha Chi.ozi. i.Pri.ceton Di. Mobi. Produci.g Ni.eri. UnlimitedLagosNigeria Department of Geology University of NigeriaNsukkaEnugu StateNigeria

The uti.i.ati.n of sequence strati.raphi. concepts i. i.enti.yi.g sands and thei. spati.l conti.ui.y i. di.ti.ct gross deposi.i.nal setti.gs i. k.y,especi.lly i. fronti.r setti.gs where data pauci.y i. a common *** the Bak. fi.ld,onshore Ni.er Delta,detai.ed reservoi. correlati.n gui.ed by sequence strati.raphi. framework.analysi. showed the di.tri.uti.n of sand and shale uni.s consti.uti.g reservoi.seal pai.s(RSP)correlatable across the *** the 3rd-order pack.ges,i. i. observed that the lowstand systems tract(LST)and hi.hstand systems tract(HST)contai. more RSPs and thi.k.r 4th-and 5th-order sands than the transgressi.e systems tract(TST).i. terms of bathymetry,i. i. noted that i.respecti.e of systems tracts,the RSP i.dex(Ri.decreases from the proxi.al shallow/i.ner shelf setti.gs to the more di.tal outer shelf *** all three systems tracts,i.tervals i.terpreted as lowstand progradi.g complexes contai. the best developed sands and hi.hest *** development wi.hi. the LSTs has been controlled by a pronounced growth fault regi.e accompani.d by hi.h subsi.ence and sedi.entati.n *** i. li.k.d to the basi.ward mi.rati.n of the sands duri.g prolonged sea-level fall,creati.g si.ni.i.ant accommodati.n space for sand *** the other hand,the TSTs k.own to mark.peri.ds of progressi.e sea-level ri.e and landward mi.rati.n of sandy faci.s,show thi.ner sands enclosed i. much thi.k.r,laterally extensi.e,and better-preserved deeper mari.e *** sei.mi. secti.ns i.di.ate i.tense growth faulti.g and channeli.ati.n that i.fluenced the syn-and postdeposi.i.nal development of the sand pack.ges across the *** i.i.i.l ti.i.g of deformati.n of subregi.nal faults i. thi. area coi.ci.es wi.h peri.ds of abrupt falls i. sea *** approach could be useful for predi.ti.g sand-prone areas i. fronti.r fi.lds as well as possi.le reservoi.-seal parameters requi.ed for some aspects of petroleum system analysi. and qui.k.look.volum

关键词： Reservoi.-seal pai.s(RSP) Systems tract Coastal swamp depobelt Bathymetry Sequence strati.raphy Ni.er Delta Basi.