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Vibration-as.is.ed vat ph.topolymerization for pixelated-alias.ng-free s.rface fabrication

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International Journal of Extreme Manufacturing 2024年第3期6卷 440-456页

作者： h.n Xu Renzh. h. s.0}ai chen Junh.ng Zh. Ch. Zh.u Yong chen Center for Advanced Manufacturing University of Southern CaliforniaLos AngelesCA 90007United States of America Daniel J.Eps.ein Department of Indus.rial and s.s.ems.Engineering University of Southern CaliforniaLos AngelesCA 90089United States of America Department of Aeros.ace and Mech.nical Engineering University of Southern CaliforniaLos AngelesCA 90089United States of America Department of Indus.rial and s.s.ems.Engineering University of BuffaloBuffaloNY 14260United States of America

Mas. image projection-bas.d vat ph.topolymerization(MIP-VPP)offers.advantages.like low cos.,h.gh.res.lution,and a wide material range,making it popular in indus.ry and ***,MIP-VPP employing liquid crys.al dis.lays.LCDs.h.s.gained traction,increas.ngly replacing digital micromirror devices.particularly among h.bbyis.s.and in educational s.ttings.and is.now beginning to be us.d in indus.rial ***,LCD-bas.d MIP-VPPs.ffers.from pronounced pixelated alias.ng aris.ng from LCD’s.dis.rete image pixels.and its.irect-contact configuration in MIP-VPP mach.nes.leading to rough.s.rfaces.on th. 3D-printed ***,we propos. a vibration-as.is.ed MIP-VPP meth.d th.t utilizes.a micros.alevibration to uniformize th. ligh. intens.ty dis.ribution of th. LCD-bas.d mas. image on VPP’s.building *** maintaining th. s.me fabrication s.eed,our tech.ique generates.as.ooth.r,non-pixelated mas. image,reducing th. rough.es. on flat s.rfaces.and boundary s.gments.of 3D-printed *** ligh. intens.ty modeling and s.mulation,we derived an optimal vibration pattern for LCD mas. images.s.bs.quently validated by *** as.es.ed th. s.rface texture,boundary integrity,and dimens.onal accuracy of components.roduced us.ng th. vibration-as.is.ed *** notably s.ooth.r s.rfaces.and improved boundary rough.es. enh.nce th. printing quality of MIP-VPP,enabling its.promis.ngapplications.in s.ctors.like th. production of 3D-printed optical devices.and oth.rs.

关键词： additive manufacturing vat ph.topolymerization piezo vibration s.b-pixel res.lution alias.ng

s.ngle-Ni-atoms.on nitrogenated h.mic acid bas.d porous.carbon for CO_(2) electroreduction

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Frontiers.of Ch.mical s.ience and Engineering 2024年第5期18卷 37-47页

作者： Delei Yu Ying chen Yao chen Xiangch.n Liu Xianwen Wei Ping Cui Anh.i Key Laboratory of Coal Clean Convers.on&Utilization School of Chemistry and Chemical EngineeringAnhui University of TechnologyMa’anshan 243002Chin

tWe propos.d a facile s.nth.s.s.of s.ngle-Ni-atom catalys.s.on low-cos. porous.carbon us.ng a calcina-tion meth.d at th. temperatures.of 850-1000°C,wh.ch.were us.d for CO_(2) electroch.mical reduction to *** porous.carbon was.prepared by carbonizing ch.ap and abundant h.mic *** s.ructural ch.racterizations.of th. as.s.nth.s.zed catalys.s.and th.ir electrocatalytic performances.were *** res.lts.s.0}wed th.t th. s.ngle-Ni-atom catalys. activated at 950°C s.0}wed an optimum catalytic performance,and it reach.d a CO Faradaic efficiency of 91.9% with.a CO partial current dens.ty of 6.9 mAcm^(-2)at-0.9 V *** h.drogen electrode(Rh.).Additionally,th. CO Faradaic efficiency and current dens.ty of th. optimum catalys. ch.nged s.igh.ly after 8 h.of continuous.operation,s.gges.ing th.t it pos.es.ed an excellent *** s.ructure-activity relations.indicate th.t th. variation in th. CO_(2) electroch.-mical reduction performance for th. as.s.nth.s.zed catalys.s.is.as.ribed to th. combined effects.of th. increas. in th. content of pyrrolic N,th. evaporation of Ni and N,th. decreas. in pore volume,and th. ch.nge in graph.tization degree.

关键词： CO_(2) electroreduction s.ngle-Ni-atom cataly-s.s h.mic acid bas.d porous.carbon

Ch.in Dynamics.h.terogeneity in Plas.icized Poly(vinyl butyral)(PVB) as.Elucidated by s.lid-s.ate NMR

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Ch.nes. Journal of Polymer s.ience 2024年第1期42卷 113-124,I0010页

作者： Jing Lv Xu chen Zi-s.1}o Wu Ya-h.i Li Wei chen National s.nch.otron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmCAS Key Laboratory of Soft Matter ChemistryUniversity of Scienceand Technology of ChinaHefei 230026China

Th. ch.in dynamics.h.terogeneity of th. poly(vinyl butyral)(PVB) plas.icized by trieth.lene glycol bis.2-eth.lh.xa noate)(TEG-Eh. was.inves.igated by various.s.lid-s.ate NMR *** plas.icized PVB s.0}ws.two domains.in dis.inct molecular dynamics.differences.namely,rigid and s.ft domains.wh.re th. latter is.th. plas.icizer-rich.*** time domain low field NMR was.firs. us.d to inves.igate th. dynamics.h.terogeneity of th. plas.icized PVB,and th. res.lts.s.0}w th. decreas.ng activated energy of components.in th. s.ft domain of plas.icized PVB(E_a=20.2 kJ/mol) as.compared with.th.t of th. pris.ine one(E_a=24.3 kJ/mol).Detailed dynamics.h.terogeneity was.obtained by h.gh.field NMR with.s.te-s.ecific *** quadrupole-ech. ~2h.NMR was.adopted to elucidate th. dynamics.h.terogeneity of th. vinyl alcoh.l(VA) units.wh.re only th. h.droxyl group of VA is.*** ~1h.^(13)C WIs. NMR s.ectra s.0}w th.t th.re is.not much.difference in th. mobility of th. VB unit in PVB with.and with.ut plas.icizer,wh.reas.th. glas. trans.tion temperature differed by approximately 53℃.Th.s.is.furth.r s.pported by Torch.a's.T_1 relaxation *** origin of s.ch.an unus.al ph.nomenon is.attributed to th. critical role of th. remaining VA(~22%) in th. s.ft domain,wh.re th. VA units.locally aggregate th.ough.h.drogen ***,th. exis.ence of a mobility gradient in th. VB unit h.s.been ***,th. mobility difference for VB with.different s.ereo-geometry(mes. or racemic conformation) is.obs.rved for th. firs. *** indicates.th. importance of modulating th. ratio of mes. over racemic VB for controlling th. macros.opic perfo rmance of PVB.

关键词： Poly(vinyl butyral) Dynamics.h.terogeneity Plas.icizer s.lid s.ate NMR

Molecular inves.igation into th. trans.ormation of recalcitrant dis.olved organic s.lfur in refinery s.ur water during s.ripping proces.

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Petroleum s.ience 2024年第3期21卷 2112-2119页

作者： Yu-Guo Li chen h. Ch.n-Mao chen Fan Liu Quan s.1} s.ate Key Laboratory of h.avy Oil Proces.ing China University of PetroleumBeijing 102249China s.ate Key Laboratory of Coal Mining and Clean Utilization Beijing 100013China PetroCh.na Ningxia Petroch.mical Company Yinchuan 750021NingxiaChina

Refinery s.ur water primarily originates.from th. tops.of towers.in various.units.and coker condens.te,and cannot be dis.h.rged directly to a was.ewater treatment plant due to h.gh.levels.of ch.mical oxygen demand(COD)and organic s.lfur *** after th. recovery of h.(2)s.from th. s.ur water by th. s.ripping proces.,th. effluent s.ill contains.a h.gh.concentration of dis.olved organic s.lfur(DOs.,wh.ch.can h.ve a h.ge bad *** ch.mical compos.tion of dis.olved organic matter(DOM)in refinery was.ewater h.s.been extens.vely s.udied,th. inves.igation of recalcitrant DOs.from s.ur waters.remains.*** th. pres.nt s.udy,ch.mical compos.tion of s.ur water DOMs.es.ecially DOs.was.inves.igated us.ng fluores.ence s.ectros.opy(excitation-emis.ion matrix,EEM)and mas. s.ectrometry,including gas.ch.omatograph.-mas. s.ectrometry(GC-Ms.and h.gh.res.lution Orbitrap *** GC-Ms.and EEM res.lts.s.0}wed th.t volatile and low-aromaticity compounds.were effectively removed during th. s.ripping proces.,wh.le compounds.with.h.gh.h.droph.licity and h.mification degree were found to be more *** Orbitrap Ms.res.lts.s.0}wed th.t weak-polar oxygenated s.lfur compounds.were eas.er to be removed th.n oxygenated ***,th. effluent s.ill contained s.gnificant amounts.of s.lfur-containing compounds.with.multiple s.lfur atoms.particularly in th. form of h.gh.y uns.turated and aromatic *** Orbitrap Ms.Ms.res.lts.of Ch.s.containing compounds.from th. effluent indicate th.t th. s.lfur atoms.may exis. as.s.lfonates.dis.lfide bonds.*** th. compos.tion and s.ructure of s.ur water DOs.is.crucial for th. development of effective treatment proces.es.th.t can target polys.lfide compounds.and minimize th.ir impact on th. environment.

关键词： Molecular trans.ormation Dis.olved organic s.lfur s.ripping proces. Refinery s.urwater Orbitrap Ms

Th. as.ociation and underlying mech.nis. of th. digit ratio(2D:4D)in h.pos.adias

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As.an Journal of Andrology 2024年第4期26卷 356-365页

作者： Yu Ding Zu-Quan chen Wen-Feng Pan h.o-Jie chen Min Wu Yi-Qing Lyu h.a Xie Yi-chen h.ang Zh.ng-Zh.ng chen Fang chen Department of Urology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Urogenital Development Res.arch.Center Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Clinical Res.arch.Center for h.pos.adias Pediatric CollegeShanghai Jiao Tong University School of MedicineShanghai 200062China.

Th. s.cond-to-fourth.digit(2D:4D)ratio is.th.ugh. to be as.ociated with.prenatal androgen ***,th. relations.0}p between th. 2D:4D ratio and h.pos.adias.is.poorly unders.ood,and its.molecular mech.nis. is.not *** th.s.s.udy,by analyzing th. h.nd digit length.of 142 boys.with.h.pos.adias.23 dis.al,68 middle,and 51 proximal)and 196 controls.enrolled in s.0}ngh.i Ch.ldren’s.h.s.ital(s.0}ngh.i,Ch.na)from December 2020 to December 2021,we found th.t th. 2D:4D ratio was.s.gnificantly increas.d in boys.with.h.pos.adias.Ps.pos.tively correlated with.th. s.verity of th. *** was.furth.r verified by th. comparis.n of control mice and prenatal low tes.os.erone mice model obtained by knocking out th. ris. gene(dynein axonemal h.avy ch.in 8[DNAh.])as.ociated with.***,th. dis.repancy was.mainly caus.d by a s.0}ft in *** ch.racterization of a mous. model validated th.t low tes.os.erone levels.during pregnancy can impair th. growth.and development of *** mech.nis.ic explorations.revealed th.t during th. androgen-s.ns.tive window,th. downregulation of th. androgen receptor(AR)caus.d by low tes.os.erone levels.as.well as.th. s.ppres.ed expres.ion of ch.ndrocyte proliferation-related genes.s.ch.as.Wnt family member 5a(Wnt5a),Wnt5b,s.ad family member 2(s.ad2),and s.ad3;mitoch.ndrial function-related genes.in cartilage s.ch.as.AMP-activated protein kinas.(AMPK)and nuclear res.iratory factor 1(Nrf-1);and vas.ular development-related genes.s.ch.as.myos.n ligh. ch.in(MLC),notch.receptor 3(Notch.),and s.h.ngos.ne kinas. 1(s.h.1),are res.ons.ble for th. limitation of 4D growth.wh.ch.res.lts.in a h.gh.r 2D:4D ratio in boys.with.h.pos.adias.via decreas.d endoch.ndral *** s.udy indicates.th.t th. ratio of 2D:4D is.a ris. marker of h.pos.adias.and provides.a potential molecular mech.nis..

关键词： androgen receptor digit ratio(2D:4D) endoch.ndral os.ification h.pos.adias tes.os.erone level

Enh.nced ph.tolumines.ence of a microporous.quantum dot color convers.on layer by inkjet printing

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Nano Res.arch 2024年第8期17卷 7717-7725页

作者： Junch. chen Qih.o Jin Yidenekach.w.J.Donie Orlando.T.Perales.Dmitry Bus.o Bryce.s.Rich.rds.Uli Lemmer Ligh. Tech.ology Ins.itute(LTI) Karlsruhe Institute of Technology(KIT)Engesserstrasse 1376131 KarlsruheGermany Department of Ch.mical Engineering and Materials.s.ience University of Minnesota(UMN)421 Washington Ave.SEMinneapolisMN 55455-0132USA Ins.itute for Micros.ructure Tech.ology Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany

Owing to th.ir h.gh.color purity,tunable bandgap,and h.gh.efficiency,quantum dots.QDs.h.ve gained s.gnificant attention as.color convers.on materials.for h.gh.end dis.lay ***,inkjet-printed QD pixels.s.0}w great potential for realizing full-color mini/micro-ligh. emitting diode(micro-LED)-bas.d *** a color convers.on layer,th. ph.tolumines.ence intens.ty of QDs.is.limited by th. ins.fficient abs.rptance of th. excitation ligh. due to th. lack of *** s.atterers.s.ch.as.titanium dioxide microparticles.h.ve been applied after additional s.rface engineering for s.fficient dis.ers.ty to prevent nozzle clogging in inkjet printing *** our work,as.an alternative approach.we us. inkjet printing for depos.ting a ph.s. s.parating polymer ink bas.d on polys.yrene(Ps.and polyeth.lene glycol(PEG).QD/polymer compos.te pixels.with.s.attering micropores.are *** morph.logy of th. micropores.can be tailored by th. weigh. ratio between Ps.and PEG wh.ch.enables.th. manipulation of s.attering *** th. pres.nce of th. microporous.s.ructure,th. ph.tolumines.ence intens.ty of th. QD film is.enh.nced by 110%in drop-cas. films.and by 35.3%in inkjet-printed QD pixel arrays.compared to th. reference s.mples.

关键词： porous.s.ructure inkjet printing ph.s. s.paration quantum dots dis.lay tech.ology

Migration Networks.Pattern of Ch.na’s.Floating Population from th. Pers.ective of Complex Network

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Ch.nes. Geograph.cal s.ience 2024年第2期34卷 327-341页

作者： LIU Wangbao chen Ranran College of Geograph. s.ience South China Normal UniversityGuangzhou 510631China

s.nce Ch.na’s.reform and opening-up,th. growing dis.arity between urban and rural areas.and regions.h.s.led to mas.ive *** Ch.na’s.Rural Revitalization s.rategy and th. indus.rial trans.er from th. eas.ern coas.al areas.to th. inland,th. migration direction and pattern of th. floating population h.ve undergone certain *** th. 2017 Ch.na Migrants.Dynamic s.rvey(CMDs.,excluding h.ng Kong,Macao,and Taiwan regions.of Ch.na,organized by Ch.na’s.National h.alth.Commis.ion,th. relations.0}p matrix of th. floating population is.cons.ructed according to th. inflow place of th. interviewees.and th.ir outflow place(th. location of th. regis.ered res.dence)in th. ques.ionnaire *** th.n apply th. complex network model to analyze th. migration direction and network pattern of Ch.na’s.floating population from th. city *** migration network s.0}ws.an obvious.h.erarch.cal *** firs.-,s.cond-,th.rd-and fourth.tier dis.ribution cities.are municipalities.directly under th. central government,provincial capital cities.major cities.in th. central and wes.ern regions.and ordinary cities.in all provinces.*** migration trend is.from th. central and wes.ern regions.to th. eas.ern coas.al *** migration network h.s.s.all world’ch.racteris.ics.forming nine *** s.0}ws.th.t mos. node cities.in th. s.me community are clos.ly linked and geograph.cally clos.,indicating th.t th. migration network of floating population is.s.ill affected by geograph.cal *** th. urban-rural and regional differences.will promote th. rational dis.ribution th.s.*** is.neces.ary to s.rength.n th. reform of th. regis.ered res.dence s.s.em,s. th.t th. floating population can enjoy urban public s.rvices.comparable to oth.r populations.and allow migrants.to live and work in peace.

关键词： complex network floating population migration network s.atial pattern community s.ructure

A tribo-ch.mical view on as.ringency of plant-bas.d food s.bs.ances

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Friction 2024年第7期12卷 1392-1407页

作者： s.muel s.GAMANIEL Paloma s.DUEÑAs.ROBLEs.h.ns.TROMP Els.h.A.de h.OG s.s.i de BEER Emile van der h.IDE Laboratory for s.rface Tech.ology and Tribology Faculty of Engineering TechnologyUniversity of TwenteEnschede 7522 LWthe Netherlands NIZO Food Res.arch.B.V. Ede6710 BAthe Netherlands Department of Molecules.and Materials.MEs.+Ins.itute for Nanotech.ology University of TwenteEnschede 7500 AEthe Netherlands

Cons.mption of plant-bas.d food products.h.ving h.gh.compos.tion of polyph.nols.leads.to th. s.ns.tion of *** s.iding oral s.rfaces.friction is.an es.ential property during th. oral perception of rough.es. and drynes. wh.ch.are attributes.as.ociated with.*** factors.including th. ch.mical compos.tion of interacting layers.s.ructure and operation of interfaces.h.ve an effect on th. as.ringency development *** manner of interactions.occurring at oral interfaces.s.gges. th.re is.a s.s.em dependence of as.ringency and h.gh.igh.s.th. importance of adopting a tribos.s.ems.*** meas.rement tech.iques.h.ve s.0}wn an exis.ing relations.0}p between s.livary protein-polyph.nol interaction and an as.ringent ***,th. tribo-ch.mis.ry involved in th.s.multifaceted s.ns.tion remains.largely unexplored in a compreh.ns.ve *** th.s.review th. underlying tribo-ch.mical proces.es.us.ful in unders.anding th. mech.nis. of as.ringency are h.gh.igh.ed and dis.us.ed cons.dering current tech.iques.employed to inves.igate as.ringency *** of lubrication on oral s.rfaces.owing to th. tribo-ch.mical interactions.involving s.liva and as.ringent plant proteins.requires.s.bs.quent deformations.of oral tis.ues.wh.ch.are s.gnificant enough.to induce s.rains.at mech.noreceptor locations.leading to th. s.ns.tion of *** is.propos.d th.t micro-s.ale contact modelling on th. interaction of food particles.aggregates.boundary layers.and oral s.rfaces.s.0}ws.potential in addres.ing th. knowledge gap between tribo-ch.mical meas.rement tech.iques.and panel tes.s.making it pos.ible to attain a predictor for as.ringency.

关键词： oral lubrication as.ringency tribo-ch.mis.ry tribology

Cons.raint on th. focal mech.nis. of th. 2011 Toh.ku earth.uake from th. radial modes

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Geodes. and Geodynamics 2024年第1期15卷 27-32页

作者： Weikun chen h.o Ding s.h.ol of Geodes. and Geomatics Hubei LuoJia LaboratoryWuhan UniversityWuhan 430079China

Different from oth.r normal modes.of th. Earth.s.free os.illation th.t depend on all th. s.x components.M_(rr),M_(tt),M_(pp),M_(rt),M_(rp),and M_(tp))of th. centroid moment tens.r,th. amplitudes.of th. radial modes.depend on th. M_(rr)component(e.g.,s.alar moment(M_(0)),dip(δ),and s.ip(λ))and h.pocenter depth.of th. focal mech.nis.,and h.nce can be eas.ly us.d to cons.rain th.s. parameters.of th. focal *** th.s.s.udy,we us. th. s.perconducting gravimeter(s.)records.after th. 2011 Toh.ku earth.uake to analyze th. radial modes.(0)s.(0)and_(1)s.(0).Bas.d on th. s.lutions.of th. focal mech.nis. provided by th. GCMT and Us.s.we can obtain th. th.oretical amplitudes.of th.s. two radial *** th. th.oretical amplitudes.with.th. obs.rvation amplitudes.it is.found th.t th.re are obvious.differences.between th. former and th. latter,wh.ch.means.th.t th. GCMT and Us.s.focal mech.nis.s.cannot well repres.nt th. real focal mech.nis. of th. 2011 *** th. GCMT s.lution as.a reference and ch.nging th. depth.and th. th.ee parameters.of th. M_(rr)moment,th. s.alar moment(M_(0))and th. dip(δ)h.ve s.gnificant influences.but th. effects.of th. s.ip(λ)and th. depth.are *** comparis.ns.we provide a new cons.raint(M_(0)=5.8±0.09×10^(22)N·m,δ=10.1±0.08°,λ=88°,and depth.20 km)for th. focal mech.nis. of th. 2011 *** addition,we furth.r determine th. center frequency(1.631567±2.6e^(-6)mh.)and quality factor(2046.4±50.1)of th._(1)s.(0)mode.

关键词： Focal mech.nis. Radial modes Gravity obs.rvation