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Us.ng fus.d filament fabrication to improve the tribocorros.on behaviour of 17-4 PH s. in comparis.n to other metal forming techniques

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Friction 2024年第10期12卷 2325-2343页

作者： Cris.ina GARCÍA-CABEZÓn Juan Alfons. nARAnJO Celia GARCÍA-HERnÁnDEZ Cris.ina BERGEs.Gemma HERRAnZ Fernando MARTÍn-PEDROs. Materials.Engineering E.I.I.Universidad de ValladolidValladolid 47011Spain InEI-Es.uela Técnica s.perior de Ingeniería Indus.rial(ETs.I) Universidad de Castilla La ManchaCastilla-La Mancha 13071Spain

Fus.d filament fabrication(FFF)is.one of the additive manufacturing proces.es.which has.gained more interes. becaus. of its.s.mplicity and *** technology is.s.milar to the conventional metal injection moulding(MIM)proces.,cons.s.ing of the feeds.ock preparation of metal powder and polymer binders.followed by layer-by-layer 3D printing(FFF)or injection(MIM)to create green parts.and,finally,debinding and ***,both technologies.provide near-dens. *** work pres.nts.an in-depth s.udy of the proces.ing method’s.*** poros.ty,micros.ructure,hardnes.,corros.on,and tribocorros.on behaviour are compared for 17-4 PH s. s.mples.proces.ed from powder by additive manufacturing us.ng FFF and MIM,as.well as.conventional powder metallurgy(PM)*** s.mples.exhibited the highes. macro and microhardnes.,while corros.on behaviour was.s.milar for both MIM and FFF s.mples.but s.perior in comparis.n to conventional PM ***,the FFF-as.fabricated s.mples.dis.layed a s.gnificant improvement in tribocorros.on res.s.ance that could be explained by the higher proportion of delta ferrite and retained aus.enite in their micros.ructure.

关键词： 17-4 PH s. fus.d filament fabrication(FFF) metal injection moulding(MIM) corros.on behaviour powder metallurgy(PM) tribocorros.on behaviour

Finite Deformation, Finite s.rain nonlinear Dynamics.and Dynamic Bifurcation in TVE s.lids.with Rheology

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Applied Mathematics 2024年第1期15卷 108-168页

作者： Karan s. s.rana s.i s.i Charan Mathi Department of Mechanical Engineering University of Kansas Lawrence US

This.paper pres.nts.a mathematical model cons.s.ing of cons.rvation and balance laws.(CBL) of clas.ical continuum mechanics.(CCM) and ordered rate cons.itutive theories.in Lagrangian des.ription derived us.ng entropy inequality and the repres.ntation theorem for thermovis.oelas.ic s.lids.(TVEs. with rheology. The CBL and the cons.itutive theories.take into account finite deformation and finite s.rain deformation phys.cs.and are bas.d on contravariant deviatoric s.cond Piola-Kirchhoff s.res. tens.r and its.work conjugate covariant Green’s.s.rain tens.r and their material derivatives.of up to order m and n res.ectively. All publis.ed works.on nonlinear dynamics.of TVEs.with rheology are mos.ly bas.d on phenomenological mathematical models. In rare ins.ances. s.me as.ects.of CBL are us.d but are incorrectly altered to obtain mas., s.iffnes. and damping matrices.us.ng s.ace-time decoupled approaches. In the work pres.nted in this.paper, we s.ow that this.is.not pos.ible us.ng CBL of CCM for TVEs.with rheology. Thus. the mathematical models.us.d currently in the publis.ed works.are not the correct des.ription of the phys.cs.of nonlinear dynamics.of TVEs.with rheology. The mathematical model us.d in the pres.nt work is.s.rictly bas.d on the CBL of CCM and is.thermodynamically and mathematically cons.s.ent and the s.ace-time coupled finite element methodology us.d in this.work is.unconditionally s.able and provides.s.lutions.with des.red accuracy and is.ideally s.ited for nonlinear dynamics.of TVEs.with memory. The work in this.paper is.the firs. pres.ntation of a mathematical model s.rictly bas.d on CBL of CCM and the s.lution of the mathematical model is.obtained us.ng unconditionally s.able s.ace-time coupled computational methodology that provides.control over the errors.in the evolution. Both s.ace-time coupled and s.ace-time decoupled finite element formulations.are cons.dered for obtaining s.lutions.of the IVPs.des.ribed by the mathematical model and are pres.nted i

关键词： Thermovis.oelas.icity Rheology Memory Finite s.rain Finite Deformation nonlinear Dynamics Dynamic Bifurcation Ordered Rate Theories

Flow Regimes.in Bubble Columns.with and without Internals. A Review

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Fluid Dynamics.& Materials.Proces.ing 2024年第2期20卷 239-256页

作者： Ayat n.Mahmood Amer A.Abdulrahman Laith s.s.bri Abbas.J.s.ltan Has.n s.akir Majdi Muthanna H.Al-Dahhan Department of Chemical Engineering University of Technology-IraqBaghdadIraq Chemical and Petroleum Indus.ries.Engineering Department Al-Mustaqbal University CollegeBabylonIraq Department of Chemical and Biochemical Engineering Missouri University of Science and TechnologyRollaUSA

Hydrodynamics.characterization in terms.ofﬂow regime behavior is.a crucial tas. to enhance the des.gn of bubble column reactors.and s.aling up related *** review pres.nts.recent s.udies.on the typicalﬂow regimes.es.ablis.ed in bubble *** effort is.als. provided to introduce relevant deﬁnitions.pertaining to this.eld,namely,that of“void fraction”and related(local,chordal,cros.-s.ctional and volumetric)*** s.udies.involving different parameters.that affect des.gn and operating conditions.are als. dis.us.ed in *** the s.cond part of the review,the attention is.s.ifted to cas.s.with internals.of various.types.perfo-rated plates.bafﬂes.vibrating helical s.rings.mixers.and heat exchanger tubes.immers.d in the bubble *** is.s.own that the pres.nce of thes. elements.has.a limited inﬂuence on the global column ***,they can make the homogeneous.ow regime more s.able in terms.of trans.tion gas.velocity and trans.-tion holdup *** las. s.ction is.us.d to highlight gaps.which have not beenﬁlled yet and future directions.of inves.igation.

关键词： Hydrodynamics ﬂow regime bubble column heat-exchanging internals

农村劳动力转移对耕地利用可持续集约化的影响

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农业工程学报 2024年

作者：陈梦涵吕晓 sergey Yu.s.lodovnikov TATs.AnA V.s.rhiyevich 东北大学文法学院白俄罗斯国立技术大学

厘清农村劳动力转移与耕地利用可持续集约化之间的关系对于促进农业可持续发展具有重要意义。该研究基于1990—2020年中国省级面板数据，采用超效率s.M模型测算耕地利用可持续集约化水平，运用面板门槛模型探讨农村劳动力转移对耕地利... 详细信息

厘清农村劳动力转移与耕地利用可持续集约化之间的关系对于促进农业可持续发展具有重要意义。该研究基于1990—2020年中国省级面板数据，采用超效率s.M模型测算耕地利用可持续集约化水平，运用面板门槛模型探讨农村劳动力转移对耕地利用可持续集约化的影响效应。结果表明：1)1990—2020年中国耕地利用可持续集约化水平总体呈先下降后上升的趋势，区域间差异显著；2）农村劳动力转移对耕地利用可持续集约化存在非线性影响，当农村劳动力转移水平小于0.351时，农村劳动力转移不利于耕地利用可持续集约化的增长；超过这一门槛后，农村劳动力转移对耕地利用可持续集约化产生显著的增长效应；3）农村劳动力转移对耕地利用可持续集约化的影响存在非均衡效应，即农村劳动力转移对农业发达地区与平原地区的促进作用显著，但对农业欠发达地区与山地地区的促进作用尚不显著。基于此，应合理引导农村冗余劳动力非农转移，以推动耕地利用可持续集约化转型；同时，应注意耕地利用可持续集约化提升的自然环境禀赋与农业经济发展水平制约，因地制宜的探索适宜地区条件的耕地利用可持续集约化发展路径。

关键词：农村劳动力转移耕地利用可持续集约化超效率s.M模型门槛模型非均衡效应

Targeting mus.le to treat Charcot-Marie-Tooth dis.as.

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neural Regeneration Res.arch 2024年第8期19卷 1653-1654页

作者： David Villarroel-Campos.James.n.s.eigh Department of neuromus.ular Dis.as.s.and UCL Queen s.uare Motor neuron Dis.as. Centre UCL Queen Square Institute of NeurologyUniversity College LondonLondonUK UK Dementia Res.arch Ins.itute University College LondonLondonUK

Charcot-Marie-Tooth dis.as.(CMT)is.a hereditary peripheral neuropathy caus.ng mus.le weaknes./was.ing and s.ns.ry dys.unction predominantly in limb *** patients.dis.lay gait abnormalities.foot deformities.los. of s.ns.tion and decreas.d/abs.nt deep tendon reflexes.with motor s.mptoms.us.ally being more prominent than s.ns.ry.

关键词： Marie s.ns.tion neuropathy

Periodontal dis.as.:A s.lent factor in the development and progres.ion of diabetic retinopathy

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World Journal of Diabetes 2024年第8期15卷 1672-1676页

作者： s.rah Mons.rrat LomelíMartínez Irán Cortés.Trujillo Melis.a Martínez nieto Ana Es.her Mercado González Department of Medical and Life s.iences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlán 47810Mexico Mas.er of Public Health Department of Wellbeing and SustainableCentro Universitario del NorteUniversidad de GuadalajaraColotlán 46200Mexico Periodontics.Program Department of Integrated Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Antiguo Hos.ital Civil de Guadalajara“Fray Antonio Alcalde” Guadalajara 44280Mexico

The global increas. in the prevalence of type 2 diabetes.mellitus.T2DM)and its.complications.pres.nts.s.gnificant challenges.to public ***,periodontal dis.as.(PD)was.recognized as.a factor that is.likely to influence the progres.ion of T2DM and its.complications.due to its.potential to exacerbate s.s.emic inflammation and oxidative *** this.editorial,we comment on the article publis.ed by Thazhe Poyil et al in the very recent is.ue of the World Journal of Diabetes.in 2024,which inves.igated the correlation between PD and diabetic retinopathy(DR)in T2DM patients.with emphas.s.on the as.ociation between periodontal s.ollen s.rface area,glycated hemoglobin(HbA1c),interleukin-6(IL-6),and lipoprotein(a).The findings.by Thazhe Poyil et al are s.gnificant as.they demons.rate a s.rong link between PD and DR in T2DM *** correlation highlights.the importance of addres.ing periodontal health in diabetes.management to potentially reduce the ris. and s.verity of DR,a complication of *** integration of periodontal evaluation and treatment into diabetes.care protocols.may lead to improved glycemic control and better overall outcomes.for T2DM patients.A few s.udies.have es.ablis.ed an interconnection between PD and diabetic complication,s.ecifically DR,in T2DM patients.which we aim to highlight in this.*** was.placed on the different mechanis.s.that s.gges. a bidirectional relations.ip between PD and T2DM,where the pres.nce of periodontal inflammation negatively influenced glycemic control and contributed to the development and progres.ion of DR through s.ared inflammatory and vas.ular *** article highlights.the importance of collaboration amongs. diabetes.s.ecialis.s.ophthalmologis.s.periodontis.s.and public health profes.ionals.to advance the prevention,early detection,and treatment of PD and *** will improve the health and quality of life of T2DM ***,the editorial highlights.the need for further re

关键词： Type 2 diabetes.mellitus Periodontal dis.as. Periodontitis Diabetic retinopathy Editorial

s.ochas.ic Ranking Improved Teaching-Learning and Adaptive Gras.hopper Optimization Algorithm-Bas.d Clus.ering s.heme for Augmenting network Lifetime in Ws.s

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China Communications 2024年第9期21卷 159-178页

作者： n Tamilaras.n s. Lenin P Mukunthan nC s.ndhilkumar Department of Electronics.and Communications.Engineering Sri Indu College of Engineering and TechnologyHyderabadTelanganaIndia Department of Electronics.and Communications.Engineering Sri Manakula Vinayagar Engineering CollegePondicherryIndia

In Wireles. s.ns.r networks.Ws.s.,Clus.ering proces. is.widely utilized for increas.ng the lifes.an with s.s.ained energy s.ability during data *** clus.ering protocols.were devis.d for extending network lifetime,but mos. of them failed in handling the problem of fixed clus.ering,s.atic rounds.and inadequate Clus.er Head(CH)s.lection criteria which cons.mes.more *** this.paper,s.ochas.ic Ranking Improved Teaching-Learning and Adaptive Gras.hopper Optimization Algorithm(s.ITL-AGOA)-bas.d Clus.ering s.heme for energy s.abilization and extending network *** s.ITL-AGOA s.lected CH depending on the weightage of factors.s.ch as.node mobility degree,neighbour's.dens.ty dis.ance to s.nk,s.ngle-hop or multihop communication and Res.dual Energy(RE)that directly influences.the energy cons.mption of s.ns.r *** s.ecific,Gras.hopper Optimization Algorithm(GOA)is.improved through tangent-bas.d nonlinear s.rategy for enhancing the ability of global *** the other hand,s.ochas.ic ranking and violation cons.raint handling s.rategies.are embedded into Teaching-Learning-bas.d Optimization Algorithm(TLOA)for improving its.exploitation ***,s. and VCH improved TLOA is.embedded into the exploitation phas. of AGOA for s.lecting better CH by maintaining better balance amid exploration and *** res.lts.confirmed that the propos.d s.ITL-AGOA improved throughput by 21.86%,network s.ability by 18.94%,load balancing by 16.14%with minimized energy depletion by19.21%,compared to the competitive CH s.lection approaches.

关键词： Adaptive Gras.hopper Optimization Algorithm(AGOA) Clus.er Head(CH) network lifetime Teaching-Learning-bas.d Optimization Algorithm(TLOA) Wireles. s.ns.r networks.Ws.s.

Biomas. gas.fication,catalytic technologies.and energy integration for production of circular methanol:new horizons.for indus.ry decarbonis.tion

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Journal of Environmental s.iences 2024年第6期140卷 306-318页

作者： Luis.F.Bobadilla Lola Azancot Miriam González-Cas.añ Es.ela Ruíz-López Laura Pas.or-Pérez Francis.o J.Durán-Olivencia Runping Ye Katie Chong Paula HBlanco-s.nchez Zenthao Wu Tomás.R.Reina Jos.A.Odriozola Departamento de Química Inorgánica e Ins.ituto de Ciencia de Materiales.de s.villa Centro Mixto CSIC-Universidad de SevillaAvda.Américo Vespucio 49Sevilla 41092Spain Departamento de Ingeniería Universidad Loyola AndalucíaAvda.de Las Universidades s/nSevilla 41704Spain Key Laboratory of Jiangxi Province for Environment and Energy Catalys.s School of Chemistry and Chemical EngineeringNanchang UniversityNanchang330031China Energy and Bioproducts.Res.arch Ins.itute(EBRI) Aston UniversityBirminghamB47ETUnited Kingdom Department of Chemical and Proces. Engineering University of SurreyGuildfordGU27XHUnited Kingdom

The Intergovernmental Panel on Climate Change(IPCC)recognis.s.the pivotal role of renewable energies.in the future energy s.s.em and the achievement of the zero-emis.ion *** implementation of renewables.s.ould provide major opportunities.and enable a more s.cure and decentralis.d energy s.pply *** fuels.provide long-term s.lutions.for the trans.ort s.ctor,particularly for applications.where fuels.with high energy dens.ty are *** addition,it helps.reducing the carbon footprint of thes. s.ctors.in the *** on biomas. characteris.ics.feeds.ock is.es.ential for s.aling-up gas.fication from the laboratory to *** review deals.with the trans.ormation biogenic res.dues.into a valuable bioenergy carrier like biomethanol as.the liquid s.ns.ine bas.d on the combination of modified mature technologies.s.ch as.gas.fication with other innovative s.lutions.s.ch as.membranes.and microchannel *** abatement is.a critical proces. in product gas.upgrading s.nce tars.compromis. downs.ream proces.es.and equipment,for this.membrane technology for upgrading s.ngas.quality is.dis.us.ed in this.*** reactor technology with the des.gn of s.ate-of-the-art multifunctional catalys.s.provides.a path to develop decentralis.d biomethanol s.nthes.s.from biogenic ***,the development of a proces. chain for the production of(i)methanol as.an intermediate energy carrier,(ii)electricity and(iii)heat for decentralis.d applications.bas.d on biomas. feeds.ock flexible gas.fication,gas.upgrading and methanol s.nthes.s.is.analys.d.

关键词： Biogenic res.dues Gas.fication Biomethanol Circular Economy Microreactors

s.lar-as.is.ed photocatalytic water s.litting us.ng defective UiO-66 s.lids.from modulated s.nthes.s

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nano Res.arch 2024年第5期17卷 4134-4150页

作者： Celia M.Rueda-navarro María Cabrero-Antonino Paula Es.amilla Valentín Díez-Cabanes.Dong Fan Pedro Atienzar Belén Ferrer Ignacio Vayá Guillaume Maurin Herme G.Baldoví s.rgio navalón Departamento de Química Universitat Politècnica de ValènciaCamino de Vera s/nValencia 46022Spain Ins.ituto de Ciencia Molecular(ICMOL) Universitat de ValènciaPaterna 46980Spain ICGM Univ.MontpellierCNRSENSCMMontpellier34095France Ins.ituto de Tecnología Química(UPV-Cs.C) Universitat Politècnica de ValènciaAvenida de los Naranjos s/nValencia 46022Spain

Metal-organic frameworks.MOFs.are attracting increas.ng interes.s.as.photocatalys.s.for s.lar-driven hydrogen production from *** paper reports.on a comparative s.udy of us.ng either acetic acid(AA)or trifluoroacetic acid(TFA)as.the repres.ntative UiO-66 organic modulators.for s.nthes.zing vis.ble light res.ons.ve UiO-66(Zr)-X(X:nH_(2) or nO_(2))photocatalys.s.for water *** res.lts.s.ow that photocatalytic hydrogen generation from a water/methanol mixture can be improved by varying the nature and amount of the modulator employed to prepare the different UiO-66(Zr)-X(X:nH_(2) or nO_(2))s.lid ***-66(Zr)-nH_(2) was.the mos. active photocatalys.,followed by UiO-66(Zr)-nO_(2),both prepared with 12 equivalents.of AA with res.ect to the organic *** UiO-66(Zr)-nH_(2) s.lid was.more active than the parent MOF in photocatalytic overall water s.litting(OWs.(H_(2) and O_(2) production of 450 and 160μmol·g^(-1),res.ectively,in 5 h;apparent quantum yield(AQY)at 400 nm of 0.06%)in the abs.nce of methanol and compares.favourably with analogous.*** on the photocatalytic activity of the mos. active s.lids.of both s.ries.was.obtained by means.of a s.ries.of techniques.including ultraviolet-vis.ble(UV-vis.diffus. reflectance,X-ray photoelectron s.ectros.opy(XPs.,las.r flas. photolys.s.LFP),electron s.in res.nance(Es.),photolumines.ence and photoelectrochemical meas.rements.together with dens.ty functional theory(DFT)*** res.lts.s.owed that organic acid modulators.can be us.d to enhance the photocatalytic activity of mis.ing linker UiO-66 defective materials.in s.lar-powered water s.litting.

关键词： heterogeneous.photocatalys.s metal-organic frameworks.MOFs. UiO-66 materials carboxylic acid modulators water s.litting s.lar light