检索结果-南通市图书馆

Journal of Magnesium and Alloy. 2024年第1期12卷 316-331页

作者： h.T.Jeong S.W.Lee W.J.kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superplastic beh.vior and associated deformation mech.nisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy.LAZ1011)with.a grain size of 3.2μm,primarily.composed of th. BCCβph.se and a small amount of th. h.Pαph.se,were examined in a temperature range of 473 K to 623 *** microstructural refinement of th.s alloy.was ach.eved by.employ.ng h.gh.ratio differential speed *** best superplasticity.was ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),wh.re tensile elongations of 550±600%were *** th. h.ating and h.lding stage of th. tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider th.s effect wh.n analy.ing and understanding th. superplastic deformation beh.vior and *** th. investigated strain rate range,th. superplastic flow at low strain rates was governed by.lattice diffusion-controlled grain boundary.sliding,wh.le at h.gh.strain rates,lattice diffusion-controlled dislocation climb creep was th. rate-controlling deformation *** was concluded th.t solute drag creep is unlikely.to *** th. late stages of deformation at 523 K,it was observed th.t grain boundary.sliding led to th. agglomeration of th.αph.se,resulting in significant strain *** mech.nism maps were constructed forβ-Mg-Li alloy. in th. form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using th. constitutive equations for various deformation mech.nisms derived based on th. data of th. current tests.

关键词： Magnesium-lith.um alloy Superplasticity Severe plastic deformation Grain size Grain growth

Boosted Lith.um-Ion Transport Kinetics in n-Ty.e Siloxene Anodes Enabled by.Selective Nucleoph.lic Substitution of Ph.sph.rus

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第10期16卷 618-637页

作者： Se In kim Woong-Ju kim Jin Gu Kang Dong-Wan kim Sch.ol of Civil Environmental and Architectural EngineeringKorea University02841 SeoulSouth Korea Nanoph.tonics Research.Center Korea Institute of Science and Technology02792 SeoulSouth Korea

Doped two-dimensional(2D)materials h.ld significant promise for advancing many.tech.ologies,such.as microelectronics,optoelectronics,and energy.***,n-ty.e 2D oxidized Si nanosh.ets,namely.n-ty.e siloxene(n-SX),are employ.d as Li-ion battery.*** th.rmal evaporation of sodium h.0}oph.sph.te at 275℃,P atoms are effectively.incorporated into siloxene(SX)with.ut compromising its 2D lay.red morph.logy.and unique Kautsky.ty.e cry.tal ***,selective nucleoph.lic substitution occurs,with.only.Si atoms being replaced by.P atoms in th. O_(3)≡Si-h.*** resulting n-SX possesses two delocalized electrons arising from th. presence of two electron donor ty.es:(i)P atoms residing in Si sites and(ii)h.*** doping concentrations are varied by.controlling th. amount of precursors or th.ir mean free *** at 2000 mA g^(-1),th. n-SX electrode with.th. optimized doping concentration(6.7×10^(19) atoms cm^(-3))delivers a capacity.of 594 mAh.g^(-1) with.a 73%capacity.retention after 500 *** improvements originate from th. enh.nced kinetics of ch.rge transport processes,including electronic conduction,ch.rge transfer,and solid-state *** approach.proposed h.rein offers an unprecedented route for engineering SX anodes to boost Li-ion storage.

关键词： Li-ion battery Two-dimensional N-ty.e siloxene Doping mech.nism Kinetics

Postmortem ^(7)Li NMR analy.is for assessing th. reversibility.of lith.um metal electrodes in lith.um metal batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy.Ch.mistry 2024年第7期94卷 430-440页

作者： Jaewon Baek Sunh. kim h.e-Tak kim Oc h.e h.n Department of Ch.mical&Biomolecular Engineering KAISTDaejeon 34141Republic of Korea Metropolitan Seoul Center Korea Basic Science InstituteSeoul 03759Republic of Korea Graduate Sch.ol of Analy.ical Science&Tech.ology Chungnam National UniversityDaejeon 34134Republic of Korea

Despite th. proficiency.of lith.um(Li)-7 NMR spectroscopy.in delineating th. ph.0}ical and ch.mical states of Li metal electrodes,ch.llenges in specimen preparation and interpretation impede its *** th.s study.we conducted a compreh.nsive postmortem analy.is utilizing ^(7)Li NMR,employ.ng a stan-dard magic angle spinning probe to examine protective-lay.r coated Li metal electrodes and LiAg alloy.electrodes against bare Li metal electrodes with.n Li metal batteries(LMBs).Our investigation explores th. effects of sample burrs,alignment with.th. magnetic field,th. existence of liquid electroly.es,and precy.ling on th. ^(7)Li NMR *** contrasting NMR spectra before and after cy.ling,we identi-fied alterations in Li^(0) and Li^(+) signals attributable to th. degradation of th. Li metal *** NMR analy.es decisively.demonstrate th. efficacy.of th. protective lay.r in mitigating dendrite and solid elec-troly.e interph.se ***,we noted th.t Li*ions near th. Li metal surface exh.bit magnetic susceptibility.anisotropy.revealing a novel approach.to study.ng diamagnetic species on Li metal elec-trodes in *** study.provides valuable insigh.s and practical guidelines for ch.racterizing distinct lith.um states with.n LMBs.

关键词： NMR spectroscopy Lith.um-7 Lith.um metal battery Electroly.e Electrode-protective lay.r Solid electroly.e interface Magnetic susceptibility.anisotropy Lith.um-metal NMR signal Diamagnetic^(7)Li NMR signal

Soleus arth.ogenic muscle inh.bition following acute lateral ankle sprain correlates with.sy.ptoms and ankle disability.but not with.postural control

在线全文

学校读者我要写书评

暂无评论

Journal of Sport and h.alth.Science 2024年第4期13卷 559-568,F0003页

作者： Ky.ng-Min kim Joo-Sung kim Alan R.Needle Department of Sport Science Sungkyunkwan UniversitySuwon-si 16419Republic of Korea Department of h.alth.and h.man Performance Texas State UniversitySan MarcosTX 78666USA Department of Public h.alth.Exercise Science Appalachian State UniversityBooneNC 28608USA Department of Reh.bilitation Science Appalachian State UniversityBooneNC 28608USA

Background:Acute lateral ankle sprains(ALAS)are associated with.long-term impairments and instability.tied to altered neural *** muscle inh.bition(AMI)h.s been observed in th.s population;h.wever,relationsh.ps with.injury.related impairments are unclear,potentially.due to th. resting,prone position in wh.ch.AMI is ty.ically.*** AMI during bipedal stance may.provide a better understanding of th.s ***:AMI was assessed in 38 y.ung adults(19 ALAS with.n 72 h.of injury.10 males,21.4±2.7 y.ars;19 h.alth.0}controls:10 males,21.9±2.2 y.ars;mean±SD)using th. h.ffmann reflex(h.reflex)during bipedal *** stimulation was administered to identify.th. _(max)imal h.reflex(h.(max))and _(max)imal motor response(M_(max))from th. soleus,fibularis longus,and tibialis anterior *** primary.outcome measure was th. h.(max)/M_(max) *** outcomes included acute sy.ptoms(pain and swelling),postural control during bipedal stance,and self-reported ***:No significant group-by.limb interactions were observed for any.***,a significant group main effect was observed in th. soleus muscle(F(1,35)=6.82,p=0.013),indicating significantly.lower h.(max)/M_(max) ratios following ALAS(0.38±0.20)compared to h.alth.0}controls(0.53±0.16).Furth.rmore,lower h.(max)/M_(max) ratios in th. soleus significantly.correlated with.acute sy.ptoms and self-reported function but not with.postural ***:Th.s study.supports previous evidence of AMI in patients with.ALAS,providing insigh. into neuroph.0}iologic impacts of musculoskeletal *** results suggest th.t assessing AMI in a standing position following acute injury.may.provide valuable insigh. into h.w AMI develops and guide potential th.rapeutic options to curb and offset th. formation of joint instability.

关键词： Acute injuries Balance h.ffmann reflex Neural excitability Patient-reported outcomes

Analy.is of th. Oscillatory.Flows of Multiple Sh.ck Waves in a Constant Area Duct

在线全文

学校读者我要写书评

暂无评论

Journal of Th.rmal Science 2024年第3期33卷 794-806页

作者： K JAMES Jintu kim h.uy.Dong Department of Mech.nical Engineering Andong National UniversityAndong36729Republic of Korea CAD-IT Korea Co. Ltd.Seoul08591Republic of Korea

Th. oscillatory.response of multiple sh.ck waves to downstream perturbations in a supersonic flow is studied numerically.in a rectangular *** sh.ck waves are formed inside th. duct at a sh.ck Mach.number of *** duct h.s an exit h.igh. of h.and th. effect of duct resonance on multiple sh.ck oscillations is investigated by.attach.ng exit ducts of length. 0h.50h.and *** downstream disturbance frequency.varied from 10 h. to 200 h. to explore th. oscillation ch.racteristics of th. multiple sh.ck *** oscillatory.response of sh.ck waves under self-excited and forced oscillation conditions are analy.ed in terms of wall static pressure,sh.ck train leading-edge location,sh.ck train length.and th. size of th. separation *** extent of th. initial sh.ck location increases with.an increase in exit duct length.for th. self-excited oscillation *** analy.is of th. sh.ck train leading edge and th. spectral analy.is of wall static pressure variations are *** variation in th. sh.ck train length.is analy.ed using th. pressure ratio meth.d for self-excited as well as forced *** RMS amplitude of th. normalized sh.ck train length.ζ_(ST))increases with.an increase in th. exit duct length.for th. self-excited oscillation *** th. downstream perturbation frequency.is increased,ζ_(ST)is decreased for exit duct *** all exit duct designs and downstream forcing frequencies,th. size of th. separation bubble grows and sh.inks during th. sh.ck oscillations,demonstrating th. dependence on duct resonance and forced oscillations.

关键词： sh.ck train downstream disturbance supersonic flow sh.ck wave boundary.lay.r interaction duct resonance flow separation

MXene-based h.0}rid materials for electroch.mical and ph.toelectroch.mical h.(2) generation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy.Ch.mistry 2024年第6期93卷 111-125,I0004页

作者： Jun y.ung kim Seung h.n Roh.Ch.ngkai Xia Uk Sim Jung Ky. kim Sch.ol of Material Science and Engineering North University of ChinaTaiyuan 030051China Sch.ol of Ch.mical Engineering Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwon 16419Republic of Korea h.0}rogen Energy.Tech.ology.Laboratory Korea Institute of Energy Technology(KENTECH)NajuJeollanamdo 58330Republic of Korea SKKU Advanced Institute of Nano Tech.ology.SAINT) Sungkyunkwan University(SKKU)2066Seobu-roJangan-guSuwon 16419Republic of Korea

Th. conversion of solar energy.to produce clean h.0}rogen fuel th.ough.water splitting is an emerging strategy.for efficiently.storing solar energy.in th. form of solar *** aligns with.th. increasing global demand for th. development of an ideal energy.alternative to fossil fuels th.t does not emit greenh.use ***(EC) and ph.toelectroch.mical(PEC) water splitting tech.ologies h.ve garnered significant attention worldwide for advanced h.0}rogen solar fuel production in recent *** ach.eve sustainable green h.(2) production,it is essential to create efficient cataly.t materials th.t are low-cost and can replace expensive noble metal-based *** ch.racteristics make th.m an ideal cataly.t material for th. ***-dimensional MXenes with.M_(n+1)X_(n) structure h.ve been identified as a promising option for EC and PEC water splitting due to th.ir superior h.0}roph.licity.metal-like conductivity.large surface area,and adjustable surface ***,we present a summary.of recent advancements in th. sy.th.sis and performance enh.ncement meth.ds for MXene h.0}rid materials in h.0}rogen production th.ough.EC and PEC water ***,we examine th. ch.llenges and insigh.s associated with.th. rational design of MXene-based h.0}rid materials to facilitate efficient water splitting for sustainable solar fuel production.

关键词： MXene h.0}rid materials EC PEC h.R OER Water splitting

Tailoring h.gh.refractive-index nanocomposites for manufacturing of ultraviolet metasurfaces

在线全文

学校读者我要写书评

暂无评论

Microsy.tems & Nanoengineering 2024年第2期10卷 303-310页

作者： h.0}njung Kang Dongky. Oh.Nara Jeon Jooh.on kim h.ngy.on kim Trevon Badloe Junsuk Rh. Department of Mech.nical Engineering Pohang University of Science and Technology(POSTECH)PohangRepublic of Korea Graduate Sch.ol of Artificial Intelligence Pohang University of Science and Technology(POSTECH)PohangRepublic of Korea Department of Ch.mical Engineering Pohang University of Science and Technology(POSTECH)PohangRepublic of Korea Department of Electrical Engineering Pohang University of Science and Technology(POSTECH)PohangRepublic of Korea POSCO-POSTECh.RIST Convergence Research.Center for Flat Optics and Metaph.tonics PohangRepublic of Korea National Institute of Nanomaterials Tech.ology.NINT) PohangRepublic of Korea

Nanoimprint lith.graph.0}NIL)h.s been utilized to address th. manufacturing ch.llenges of h.gh.cost and low th.ough.ut for optical *** overcome th. limitations inh.rent in conventional imprint resins ch.racterized by.a low refractive index(n),h.gh.n nanocomposites h.ve been introduced to directly.serve as ***,compreh.nsive research.on th.se nanocomposites is notably.*** th.s study.we focus on th. composition of h.gh.n zirconium dioxide(ZrO_(2))nanoparticle(NP)concentration and solvents used to produce ultraviolet(UV)metah.lograms and quantify.th. transfer fidelity.by.th. measured conversion *** utilization of 80 wt%ZrO_(2)NPs in MIBK,MEK,and acetone results in conversion efficiencies of 62.3%,51.4%,and 61.5%,respectively.at a wavelength.of 325 *** analy.is of th. solvent composition and NP concentration can furth.r enh.nce th. manufacturing capabilities of h.gh.n nanocomposites in NIL,enabling potential practical use of optical metasurfaces.

关键词： ultraviolet refractive nanocomposites

Sleep Posture Classification Using RGB and Th.rmal Cameras Based on Deep Learning Model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2024年第8期140卷 1729-1755页

作者： Awais Kh.n Ch.my.ng kim Jung-y.on kim Ah.an Aziz y.ny.ung Nam Department of ICT Convergence Soonchunhyang UniversityAsan31538Korea ICT Convergence Research.Center Soonchunhyang UniversityAsan31538Korea Emotional and Intelligent Ch.ld Care Convergence Research.Center Soonchunhyang UniversityAsan31538Korea

Sleep posture surveillance is crucial for patient comfort,y.t current sy.tems face difficulties in providing compre-h.nsive studies due to th. obstruction caused by.*** posture assessment remains ch.llenging because of th. complex nature of th. h.man body.and variations in sleep ***,th.s study.introduces an innovative meth.d utilizing RGB and th.rmal cameras for compreh.nsive posture classification,th.reby.enh.ncing th. analy.is of body.position and *** meth.d begins by.capturing a dataset of sleep postures in th. form of videos using RGB and th.rmal cameras,wh.ch.depict six commonly.adopted postures:supine,left log,righ. log,prone h.ad,prone left,and prone *** study.involves 10 participants under two conditions:with.and with.ut ***,th. database is normalized into a video *** subsequent step entails training a fine-tuned,pretrained Visual Geometry.Group(VGG16)and ResNet50 *** th. th.rd ph.se,th. extracted features are utilized for *** fourth.step of th. proposed approach.employ. a serial fusion tech.ique based on th. normal distribution to merge th. vectors derived from both.th. RGB and th.rmal ***,th. fused vectors are passed to mach.ne learning classifiers for final *** dataset,wh.ch.includes h.man sleep postures used in th.s study.s experiments,ach.eved a 96.7%accuracy.rate using th. Quadratic Support Vector Mach.ne(QSVM)with.ut th. ***,th. Linear SVM,wh.n utilized with.a blanket,attained an accuracy.of 96%.Wh.n normal distribution serial fusion was applied to th. blanket features,it resulted in a remarkable average accuracy.of 99%.

关键词： h.man sleep posture VGG16 deep learning ResNet50 fusion mach.ne learning

Stable immobilization of lith.um poly.ulfides using th.ee-dimensional ordered mesoporous Mn2O3 as th. h.st material in lith.um-sulfur batteries

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Carbon Energy 2024年第6期6卷 99-112页

作者： Sung Joon Park y.n Jeong Ch.i h.0}n-seung kim Min Joo h.ng h.ngjun Ch.ng Jangh.0}k Moon y.ung-Jun kim Juny.ung Mun Ki Jae kim Department of Energy.Science Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea Department of Energy.Engineering Konkuk UniversitySeoulRepublic of Korea Advanced Batteries Research.Center Korea Electronic Technology InstituteSeongnamRepublic of Korea Department of Future Energy.Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Energy.Sy.tems Engineering Chung-Ang UniversitySeoulRepublic of Korea SKKU Advanced Institute of Nanotech.ology Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea SKKU Institute of Energy.Science and Tech.ology.SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea Sch.ol of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwonRepublic of Korea

Lith.um-sulfur batteries(LSBs)h.ve drawn significant attention owing to th.ir h.gh.th.oretical disch.rge capacity.and energy.***,th. dissolution of long-ch.in poly.ulfides into th. electroly.e during th. ch.rge and disch.rge process(“sh.ttle effect”)results in fast capacity.fading and inferior electroch.mical *** th.s study.Mn_(2)O_(3)with.an ordered mesoporous structure(OM-Mn_(2)O_(3))was designed as a cath.de h.st for LSBs via KIT-6 h.rd templating,to effectively.inh.bit th. poly.ulfide sh.ttle ***-Mn_(2)O_(3)offers numerous pores to confine sulfur and tigh.ly.anch.r th. dissolved poly.ulfides th.ough.th. combined effects of strong polar-polar interactions,poly.ulfides,and sulfur ch.in *** OM-Mn_(2)O_(3)/S composite electrode delivered a disch.rge capacity.of 561 mAh.g-1 after 250 cy.les at 0.5 C owing to th. excellent performance of OM-Mn_(2)O_(3).Furth.rmore,it retained a disch.rge capacity.of 628mA h.g-1 even at a rate of 2 C,wh.ch.was significantly.h.gh.r th.n th.t of a pristine sulfur electrode(206mA h.g-1).Th.se findings provide a prospective strategy.for designing cath.de materials for h.gh.performance LSBs.

关键词： h.st material lith.um-sulfur battery ordered mesoporous structure sh.ttle effect transition-metal oxides

On-ch.p ph.0}iological mimicry.of neurovascular unit: ch.llenges and perspectives

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第3期19卷 499-500页

作者： Song Ih.Ah. y.ngTae kim Sch.ol of Mech.nical Engineering Pusan National UniversityBusanSouth Korea George W.Woodruff Sch.ol of Mech.nical Engineering Georgia Institute of TechnologyAtlantaGAUSA Parker h.Petit Institute for Bioengineering and Bioscience Georgia Institute of TechnologyAtlantaGAUSA Wallace h.Coulter Department of Biomedical Engineering Georgia Institute of TechnologyAtlantaGAUSA Institute for Electronics and Nanotech.ology Georgia Institute of TechnologyAtlantaGAUSA

Neurological disorders including neurodegenerative diseases,brain tumors,and stroke are th. second leading cause of death.and th. greatest cause of disability.***,it remains ch.llenging to ach.eve effective drug delivery.to th. central nervous sy.tem for treatments of neurological diseases due to th. blood-brain barrier(BBB).Th. function of th. BBB is regulated by.th. ph.0}iological interactions between various ty.es of cells in th. neurovascular unit(NVU).In th. NVU,th. brain vasculature of th. BBB is surrounded by.brain pericy.es,brain astrocy.es,neurons,and microglia(Figure 1).Moreover,th. NVU at th. levels of arteries and veins includes contractile smooth.muscle cells(Sch.effer and Iadecola,2021).

关键词： diseases death arteries