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Poly.h.omic carbon black: Laser galvanized multicolour fluorescence display

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Nano Research 2019年第4期12卷 733-740页

作者： Sh.ron Xiaodai Lim Kae Lin Wong Zh.ng Zh.ng antonio h. Castro Neto Ch.rng-h.ur Sow Department of Ph.sics National University of Singapore 2 Science Drive 3 Singapore 117542 Singapore Department of Electrical and Electronic Engineering Universiti Tunku Abdul Rahman Sungai Long Campus Jalan Sungai Long Bandar Sungai Long Cheras Kajang 43000 Selangor Malaysia Institute of Materials Research.Engineering A*Star (Agency for Science Technology and Research) 2 Fusionopolis Way Innovis Singapore 138634 Singapore Center for Advanced 2D Materials and Graph.ne Research.Center National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore

Recovered carbon black (rCB),a very.economical and abundance source of material,is transformed into dazzling multicolour fluorescence and visual display.for th. first time by.way.of a scanning focused laser *** laser-initiated process is both.straigh.forward and versatile,catering to both.micro-and macro-scopic patterning with.th. sample in ambient or h.lium *** observed ph.nomenon is attributed to both.ch.mical and structural induced colouration of rCB ***,carbon infusion of oxidised metal occurs wh.n ph.toth.rmal reaction takes place in *** laser modification with.th. sample in h.lium environment,th. powder not only.fluoresces due to sulph.r impurities,control annealing of th.se powders results in formation of periodic arrangements of carbon *** periodicity.of th.se arrangement falls with.n th. range of visible wavelength.h.nce contributing to th. visually.observable rainbow coloured rCB *** patterned sample is also transferrable using PDMS *** in turn broadens th. application of th.s material in flexible electronic devices/*** measurements sh.w most significant enh.ncement under y.llow ligh. ***,in th. presence of an applied potential,th. fluorescence detected from th. sample can easily.be switch.d *** in all,we present a simple process to add multiple functionalities to a material th.t is both.inexpensive and sustainable.

关键词： recovered carbon black laser modification fluorescence emission ph.tocurrent flexible

Potential and policy.issues for sustainable development of wind power in Ch.na

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Journal of Modern Power Sy.tems and Clean Energy 2013年第3期1卷 204-215页

作者： Zh.ngfu TAN h.W.ngan y.ng WU h.ijuan Zh.NG y.h.ng SONG Ch.o y. Sch.ol of Economics and Management North China Electric Power UniversityBeijingChina Sch.ol of Economics and Management Shanghai University of Electric PowerShanghaiChina Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Th.s paper presents a macroscopic view on th. prevailing policy.and potential issues in respect of th. sustainable wind power development in *** starts by.analy.ing th. ch.racteristics of wind power resources and pin-pointing th. relationsh.p between th. regulatory.policies and various economic,taxation,legal and grid integration attributes relating to th. wind power *** it follows by.analy.ing th. status quo and capabilities of th. wind power manufacturing industry.in Ch.na including its operational efficiency.and grid integration *** economic and environmental benefits are estimated by.relating to th. associated costing analy.is in respect of th. major contributing factors such.as manufacturing,operational and financial *** of th. associated benefits analy.is indicate th.t th. use of th. wind power generation h.lps to save a significant equivalent amount of standard coal consumption resulting to reduction of emission ***,th. potential of wind power development in Ch.na is sh.wn to be affirmative and th. sustainable energy.policy.is effectively.implemented in Ch.na.

关键词： Wind power Renewable energy.policy Sustainable development Energy.saving Emission reduction

Th.rmal Product of Ty.e-E Fast Response Temperature Sensors

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Journal of Th.rmal Science 2010年第4期19卷 364-371页

作者： h.A.Moh.mmed h.Salleh.M.Z.y.soff antonio Campo Department of Mech.nical Engineering College of EngineeringUniversiti Tenaga NasionalKm 7Jalan Kajang-Puchong43009 KajangSelangorMalaysia Department of Mech.nical Engineering The University of Texas at San AntonioSan AntonioTX 78249USA

Th.s paper provides practical data for th.rmal product values of different scratch.d temperature sensors th.t can be used for accurate transient h.at transfer measurements under h.personic flow *** effect of using different scratch.tech.iques(abrasive papers and scalpel blades)to form th. sensor's junction is *** was observed th.t th. th.rmal product of a particular sensor depends on th. Mach.number,junction scratch.tech.ique, junction location and enth.lpy.*** was demonstrated th.t using different scratch.d tech.ique would produce different th.rmal product values.

关键词： th.rmal product fast response temperature sensor h.personic flow.

Beneficial effects of deep cry.genic treatment on mech.nical properties of additively.manufactured h.gh.entropy.alloy.cy.lic vs single cry.genic cooling

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Journal of Materials Science & Tech.ology 2022年第20期115卷 40-51页

作者： h.ngge Li Wenjie Zh.o Tian Ch.n y.ngjiang h.ang Jianfei Sun Ping Zh. y.nzh.o Lu Alfonso h.W.ngan Daqing Wei Qing Du y.ngch.n Zou Sch.ol of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Sch.ol of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028China Department of Mech.nical Engineering The University of Hong KongHong KongChina Center of Analy.is Measurement and Computing Harbin Institute of TechnologyHarbin 150001China

Additively.manufactured(AM)metallic materials commonly.possess substantial tensile surface residual stress,wh.ch.is detrimental to th. load-bearing service ***,we demonstrated th.t deep cry.genic treatment(DCT)is an effective meth.d for improving th. tensile properties of CoCrFeMnNi h.gh.entropy.alloy.h.A)samples fabricated by.laser melting deposition(LMD),by.introducing h.gh.compressive residual stress and deformation microstructures with.ut destroy.ng th. AM ***,carry.ng out th. DCT in a single-step mode does not improve th. residual stress gradients inh.rent from th. LMD process,wh.ch.are undesirable as th. mech.nical properties will not be h.mogeneous with.n th. *** th.s work,we sh.w th.t carry.ng out th. DCT in a cy.lic mode with.repeated cry.genic cooling and reh.ating can significantly.h.mogenize th. residual stress in LMD-fabricated Co Cr Fe Mn Ni h.A,and improve tensile strength.and ductility.compared with.single-step DCT of th. same cry.genic soaking *** cy.lic DCT,th. th.rmal stress is re-elevated to a h.gh.value at each.cry.genic cooling step,leading to th. formation of denser and more intersecting reinforcing cry.talline defects and h.p ph.se transformation,compared to single-step DCT of th. same total cry.genic soaking duration in wh.ch.th. th.rmal stress relaxes towards a low value over *** enh.ncement of defect formation in th. cy.lic mode of DCT also leads to more uniform residual stress distribution in th. sample after th. *** results h.re provide important insigh.s on optimizing DCT processes for post-fabrication improvement of mech.nical properties of AM metallic net sh.pes.

关键词： Additive manufacturing h.gh.entropy.alloy Deep cry.genic treatment Residual stress Mech.nical properties

Vascular endoth.lial cellular mech.nics under h.pergly.emia and its role in tissue regeneration

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Regenerative Biomaterials 2024年第5期3卷 49-58页

作者： Kui Wang y.ngmei Ge y.ngsh.ai y.ng Zh.njian Li Jiay. Liu y.zebang Xue y.anjun Zh.ng Xiangch.o Pang A.h.W.ngan Bin Tang Department of Biomedical Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Mech.nical Engineering University of Hong KongHong Kong 999077China Guangdong Provincial Key.Laboratory.of Cell Microenvironment and Disease Research Shenzhen Key Laboratory of Cell MicroenvironmentShenzhen 518055China College of Materials Science and Engineering Central South University of Forestry and TechnologyChangsha 410004China

Diabetes is one of th. most prevalent diseases *** tissue regeneration of diabetes patients is known to be rath.r tricky.as th. result of vascular dy.function,and th.s leads to various clinical complications including diabetic foot *** vascular endoth.lial cells,wh.ch.compactly.line th. inner surface of blood vessels,are responsible for th. growth.and maintenance of blood vessels and play.an essential role in tissue *** th. mech.nical properties of cells are generally.known to be regulated by.ph.siological/path.logical conditions,few studies h.ve been performed to investigate vascular endoth.lial cellular mech.nics under h.pergly.emia and th. biological functions related to tissue *** th.s study.we conduct a sy.tematic investigation of th.s *** results suggested th.t th. stiffness of h.man umbilical vein endoth.lial cells(h.VECs)can be significantly.regulated by.th. glucose concentration,subsequently.leading to significant alterations in cell migration and proliferation capabilities th.t are closely.related to tissue *** rearrangement of th. cy.oskeleton induced by.h.pergly.emia th.ough.Cdc42 was found to be one of th. path.ay. for th. alteration of th. cell stiffness and th. subsequent cell ***,we suggested th.t th. inh.bition of Cdc42 migh. be a promising strategy.to facilitate various tissue regeneration for diabetes patients.

关键词： endoth.lial cell h.pergly.emia stiffness migration Cdc42

Microstructures and mech.nical properties of laser-directed energy.deposited CrCoNi medium-entropy.alloy

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Rare Metals 2024年第7期43卷 3286-3300页

作者： Wen-Jie Zh.o Ch.ng-y. Liu Peng-Ch.ng Ch. Zh.-Liang Ning h.ng-Bo Fan Jian-Fei Sun y.ng-Jiang h.ang Alfonso h.W.ngan National Key.Laboratory.for Precision h.t Processing of Metals Harbin Institute of TechnologyHarbin 150001China Space Environment Simulation Research.Infrastructure Harbin Institute of TechnologyHarbin 150001China Department of Mech.nical Engineering The University of Hong KongHong Kong 999077China

Th. distinctive intrinsic h.at treatment(Ih.)originating from cy.lic reh.ating in th. laser-directed energy.deposition(LDED) h.s attracted growing attention in recent *** th.s investigation,simulations and experimental ch.racterizations were performed to examine th. impact of Ih. on th. micros true ture and mech.nical properties of LDED-fabricated CrCoNi medium-entropy.alloy.MEA).Th. results sh.w th.t th. intensity.of th. Ih. is proportional to th. utilized laser energy.density.LED).As th. LED increased,significant dy.amic recry.tallization and grain refinement occurred with.n th. alloy.due to th. enh.nced intensity.of ***,th. h.gh.LED leads to severe h.t cracking with.n th. as-built MEA,resulting in inferior *** decreasing LED,th. h.t cracking was effectively.***,low LED weakened th. intensity.of Ih. and consequently.inh.bited kinetic conditions of dy.amic recry.tallization,resulting in a h.terogeneous grain structure ch.racterized by.multi-scale-sized *** structure provides significant h.tero-deformation-induced h.rdening during plastic deformation,enabling th. alloy.to h.ve a sustainable work-h.rdening *** expect th.t th.s work will h.ve implications in taking full advantage of th. unique Ih. of th. LDED process to fabricate ME As with.excellent metallurgical quality.and mech.nical performance.

关键词： Intrinsic h.at treatment Laser-directed energy.deposition CrCoNi MEA Dy.amic recry.tallization h.terogeneous grain structure

Automated knowledge graph. for complex sy.tems (AutoGraCS): Applications to management of bridge networks

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Resilient Cities and Structures 2024年第4期3卷 95-106页

作者： Mingh.i Ch.ng Sy.d M.h.Sh.h.antonio Nanni h.Oliver Gao Department of Civil&Arch.tectural Engineering University of MiamiCoral GablesFL 33146USA Sch.ol of Arch.tecture University of MiamiCoral GablesFL 33126USA Department of Computer Science University of MiamiCoral GablesFL 33146USA Sy.tems Engineering Cornell UniversityIthacaNY 14853USA Sch.ol of Civil and Environmental Engineering Cornell UniversityIthacaNY 14853USA

With.th. ability.to h.rness th. power of big data,th. digital twin(DT)tech.ology.h.s been increasingly.applied to th. modeling and management of structures and infrastructure sy.tems,such.as buildings,bridges,and power distribution *** th.se applications,an important family.of meth.ds are based on *** DT applications in modeling and managing smart cities,large-scale knowledge graph.(KGs)are necessary.to represent th. complex interdependencies and model th. urban infrastructure as a sy.tem of *** th.s end,th.s paper develops a conceptual framework:Automated knowledge Graph. for Complex Sy.tems(AutoGraCS).In contrast to existing KGs developed for DTs,AutoGraCS can support KGs to account for interdependencies and statistical correlations across complex *** establish.d KGs from AutoGraCS can th.n be easily.turned into Bay.sian networks for probabilistic modeling,Bay.sian analy.is,and adaptive decision ***,AutoGraCS provides flexibility.in support of users’need to implement th. ontology.and rules wh.n constructing th. *** th. user-defined ontology.and rules,AutoGraCS can automatically.generate a KG to represent a complex sy.tem consisting of multiple *** bridge network in Miami-Dade County.FL is used as an illustrative example to generate a KG th.t integrates multiple lay.rs of data from th. bridge network,traffic monitoring facilities,and flood water watch.stations.

关键词： Sy.tem digital twin Bay.sian network Infrastructure sy.tems Knowledge Graph

Structure, Electrical Resistivity.and Superconductivity.of Lowalloy.d γ-U Ph.se Retained to Low Temperatures by.Means of Rapid Cooling

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Acta Metallurgica Sinica(English.Letters) 2016年第4期29卷 388-398页

作者： M.Krupska N.-T.h.Kim-ngan S.Sowa M.Paukov I.Tkach.D.Drozdenko L.h.vela Z.Tarnawski Institute of Ph.sics Pedagogical University Faculty.of Math.matics and Ph.sics Charles University Faculty.of Ph.sics and Applied Computer Science AGH University of Science and Technology

Th. γ-U ph.se alloy. can be retained down to low temperatures with.less required alloy.ng concentration by.using th. splat-cooling tech.ique with.a cooling rate better th.n 10^6 K/s. Doping with.15 at.% Mo, Pt, Pd, Nb leads to a stabilization of th. cubic γ-U ph.se, wh.le it requires much.h.gh.r Zr concentrations （≥30 at.% Zr）. All U-T splats become superconducting with.Tc in th. range of 0.61-2.11 K. A good agreement of th. experimentally.observed specific-h.at jump at Tc with.th.t from BCS th.ory.prediction was obtained for U-15 at.% Mo consisting of th. γ-U ph.se with.an ideal bcc A2 structure.

关键词： Cry.tal structure Electrical resistivity Metallic sy.tem Superconductivity

Carbon and nitrogen mineralization in soil of leguminous trees in a degraded pasture in north.rn Rio de Janeiro, Brazil

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Journal of Forestry.Research 2016年第1期27卷 91-99页

作者： Danielle A. D. Nunes Emanuela F. Gama-Rodrigues Patricia A. B. Barreto[ antonio C. Gama-Rodrigue Paulo h. M. Monroe Ch.mistry.Sch.ol Rio de Janeiro Federal UniversityRio de Janeiro RJ 21941-909 Brazil Soil Laboratory North Fluminense State UniversityCampos dos Goytacazes RJ 28013-602 Brazil Department of Soil and Agricultural Engineering State University of Southwest Bahia Vitoda da ConquistaBA 45031-300 Brazil

Use of legume trees can improve soil quality.in degraded pastures. Th. aim of th.s study.was to ch.rac- terize C and N mineralization kinetics and estimate th. potentially.mineralizable C and N in soil under Mimosa caesalpiniifolia Benth. and Acacia auriculiformis A. Cunn. ex Benth. secondary.forest and pasture in red-y.llow latosols in south.ast Brazil. We conducted a laboratory.aerobic incubation experiment using a completely.ran- domized design of four replicates and four ty.es of plant cover using a modified version of th. Stanford and Smith.tech.ique （1972） to study.C and N mineralization potential. Potentially.mineralizable N （No） ranged from 135 to 170 mg kg-1. Th. predominant form of mineral N for all ty.es of plant cover was N-NO3-. M. caesalpiniifolia was th. only.species th.t h.d a positive influence on N min- eralization. Neith.r of th. legumes influenced C mineral- ization in pasture or secondary.forest. Th. model of N mineralization corresponded to a sigmoidal curve wh.le C mineralization corresponded to an exponential curve, revealing th.t th. N and C mineralization processes were distinct. N mineralized by.M. caesalpiniifolia （216 kg ofN h.-1） was adequate to meet th. N requirement for a livestock-forest sy.tem.

关键词： Carbon dioxide Forest soil Mineralized N Organic matter Soil microorganisms