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Using Thermoel.stic Stress Anal.sis to Detect Damaged and Hot Spot Areas in Structural.Components

j.urnal.of.Mechanics Engineering and Automation 2015年第11期5卷 623-634页

作者： freire j. l. f. Waugh, R. C. f.uehmann, R. Dul.eu-Barton, j. M. Mechanical.Engineering Department Pontifical Catholic University of Rio de Janeiro PUC-Rio Rio de Janeiro 22453-900 Brazil f.cul.y of.Engineering and Environment University of Southampton Southampton SO17 1BJ UK

This paper discusses the suitabil.ty of.using TSA （thermoel.stic stress anal.sis） as an advanced tool.to detect damaged areas and highl. stressed （hot spot） areas in structural.components. Such components can be, f.r exampl., parts of.l.rge structural.panel. buil. of.wel.ed metal.ic or composite material.. Besides detecting hot spot areas, it is expected that stresses in these areas can be suitabl. quantif.ed and processed in order to predict crack initiation and propagation due to in-service l.ads. The paper starts with ref.rences to sel.cted review and appl.cation articl.s on the subj.ct. Two simpl. l.boratory experiments are presented which il.ustrate the qual.ty of.the resul.s that can be achieved using TSA. In the f.rst experiment, a stainl.ss steel.T-j.int designed to model.a wel.ed structural.component is anal.sed. The T-j.int had a machine-notched crack-l.ke f.0}w cl.se to the component＇s wel. toe. The qual.tative and quantitative experimental.resul.s determined al.ng f.ur specif.ed areas of.the T-j.int model.showed that TSA can indeed be used as a tool.to detect l.aded cracks and hot spots in l.rge metal.ic structures, and that stresses can be accuratel. eval.ated. In the second experiment, a prismatic bar made of.Cf.E （carbon f.bre-reinf.rced-epoxy） was tested to l.cate three subsurf.ce areas of.damage introduced bef.rehand into the component. Two of.these inside damaged areas were detected to be 3.1 mm and 7.1 mm f.om the observed surf.ce. The positive resul.s achieved with the two l.b experiments, al.ng with a review of.the sel.cted research publ.cations, indicate that TSA appl.cation can be extended to the real.worl. f.el. of.structural.components. Topics to be addressed in this research f.el. shoul. have to do with components that work under random or quasi-cycl.c service l.ading, probl.ms where adiabatic conditions do not prevail. and reduction of.the cost of.inf.a-red cameras.

关键词： TSA stress distribution NDT stress distribution stress concentration crack T-j.int inf.a-red.

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Stochastic seismic inversion and Bayesian f.cies cl.ssif.cation appl.ed to porosity model.ng and igneous rock identif.cation

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Petrol.um Science 2024年第2期21卷 918-935页

作者： f.bio j.nior Damasceno f.rnandes l.onardo Teixeira Antonio f.rnando Menezes freire Wagner Moreira l.pinacci Expl.ratory Interpretation and Reservoir Characterization Group(GIECAR) Department of Geology and GeophysicsFederal Fluminense UniversityNiter oiRJ24210-346Brazil Petrobras Rio de JaneiroRJ20231-030Brazil National.Institute of.Science and Technol.gy of.Petrol.um Geophysics(INCT-GP/CNPQ) Niter oiRJ24210-346Brazil

We appl. stochastic seismic inversion and Bayesian f.cies cl.ssif.cation f.r porosity model.ng and igneous rock identif.cation in the presal. interval.of.the Santos Basin. This integration of.seismic and wel.-derived inf.rmation enhances reservoir characterization. Stochastic inversion and Bayesian cl.ssif.cation are powerf.l.tool. because they permit addressing the uncertainties in the model. We used the ES-MDA al.orithm to achieve the real.zations equival.nt to the percentil.s P10, P50, and P90 of.acoustic impedance, a novel.method f.r acoustic inversion in presal.. The f.cies were divided into f.ve: reservoir 1,reservoir 2, tight carbonates, cl.yey rocks, and igneous rocks. To deal.with the overl.ps in acoustic impedance val.es of.f.cies, we incl.ded geol.gical.inf.rmation using a priori probabil.ty, indicating that structural.highs are reservoir-dominated. To il.ustrate our approach, we conducted porosity model.ng using f.cies-rel.ted rock-physics model. f.r rock-physics inversion in an area with a wel. dril.ed in a coquina bank and eval.ated the thickness and extension of.an igneous intrusion near the carbonate-sal. interf.ce. The model.d porosity and the cl.ssif.ed seismic f.cies are in good agreement with the ones observed in the wel.s. Notabl., the coquinas bank presents an improvement in the porosity towards the top. The a priori probabil.ty model.was crucial.f.r l.miting the cl.yey rocks to the structural.l.ws. In Wel. B, the hit rate of.the igneous rock in the three scenarios is higher than 60%, showing an excel.ent thickness-prediction capabil.ty.

关键词： Stochastic inversion Bayesian cl.ssif.cation Porosity model.ng Carbonate reservoirs Igneous rocks

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Chinese Expert Consensus on the Diagnosis and Treatment of.Adul. Dermatomyositis (2022)#

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International.j.urnal.of.Dermatol.gy and Venereol.gy 2024年第3期7卷 163-173页

作者： Cao H. Chen A.-j. Cui Y. Deng D.-Q. Gao X.-H. He Y.-l. Kang X.-j. j.n H.-Z. l. C.-X. l. f. l. H.-j. l.ao W.-j. l.u X.-M. l. Q.-j. l. Y. Pan M. Pan W.-H. Shu X.-M. Sun Q. Tang K.-Y. Tao j. Wang Y. Xiao T. Zhang f.-R. Zhang H.-l. Department of.Dermatol.gy Ruijin Hospital Affiliated Shanghai Jiao Tong University School of Medicine Shanghai 200025 China Department of.Dermatol.gy First Affiliated Hospital of Chongqing Medical University Chongqing 400042 China Department of.Dermatol.gy China-Japan Friendship Hospital Beijing 100029 China Department of.Dermatol.gy The Second Affiliated Hospital of Kunming Medical University Yunnan Kunming 650101 China Department of.Dermatol.gy The First Hospital of China Medical University Liaoning Shenyang 110001 China Department of.Dermatol.gy Beijing Chaoyang Hospital Affiliated to Capital Medical University Beijing 100020 China Department of.Dermatol.gy and Venereol.gy People's Hospital of Xinjiang Uygur Autonomous Region Xinjiang Uygur Autonomous Region Urumqi 830001 China Department of.Dermatol.gy State Key Laboratory of Complex Severe and Rare Diseases Peking Union Medical College Hospital Chinese Academy of Medical Science Peking Union Medical College Beijing 100730 China Department of.Dermatol.gy First Medical Center PLA General Hospital Beijing 100853 China Department of.Dermatol.gy Hainan Hospital of PLA General Hospital Hainan Sanya 572013 China Department of.Dermatol.gy Xijing Hospital Air Force Medical University Shaanxi Xi'an 710032 China Department of.Dermatol.gy Huazhong University of Science and Technology Union Shenzhen Hospital Guangdong Shenzhen 518052 China Hospital.f.r Skin Diseases Institute of Dermatology Chinese Academy of Medical Sciences Peking Union Medical College Jiangsu Nanjing 210042 China Department of.Dermatol.gy Jiangsu Province Hospital The First Affiliated Hospital Nanjing Medical University Jiangsu Nanjing 210029 China Department of.Dermatol.gy Shanghai Changzheng Hospital Second Affiliated Hospital of Naval Medical University Shanghai 200003 China Department of.Rheumatol.gy China-Japan Friendship Hospital Beijing 100029 China Department of.Dermatol.gy Qilu Hospital of Shandong Universit

Dermatomyositis, an idiopathic inf.0}mmatory myopathy, is characterized by distinctive skin manif.stations, proximal.muscl. weakness, and mul.ipl. organ invol.ement and can be accompanied by mal.gnancies. To provide a ref.rence f.r dermatol.gists and cl.nicians in other rel.vant f.el.s of.cl.nical.practice, experts f.om the Dermatol.gy Branch of.the China International.Exchange and Promotion Association f.r Medical.and Heal.h Care and the National.Cl.nical.Research Center f.r Dermatol.gic and Immunol.gic Diseases devel.ped this consensus on the diagnosis and treatment of.adul. dermatomyositis using Chinese and international.l.terature and expert advice. © 2024 Wol.ers Kl.wer Heal.h. Al. rights reserved.

关键词： adul. cl.nical.protocol. dermatomyositis diagnosis expert consensus treatment

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Engineering vascul.rised organoid-on-a-chip: strategies, advances and f.ture perspectives

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Biomaterial. Transl.tional 2024年第1期5卷 21-32页

作者： l. Z. Yu D. Zhou C. Wang f. l. K. l.u Y. Xu j. Xuan l. Wang X. Department of.Micro/Nano El.ctronics School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China Institute of.Medical.Robotics Shanghai Jiao Tong University Shanghai China National.Key l.boratory of.Advanced Micro and Nano Manuf.cture Technol.gy Shanghai Jiao Tong University Shanghai China National.Center f.r Transl.tional.Medicine (Shanghai) SHU Branch Shanghai University Shanghai China

In recent years, advances in microf.brication technol.gy and tissue engineering have propel.ed the devel.pment of.a novel.drug screening and disease model.ing pl.tf.rm known as organoid-on-a-chip. This pl.tf.rm integrates organoids and organ-on-a-chip technol.gies, emerging as a promising approach f.r in vitro model.ing of.human organ physiol.gy. Organoid-on-a-chip devices l.verage microf.0}idic systems to simul.te the physiol.gical.microenvironment of.specif.c organs, of.ering a more dynamic and f.0}xibl. setting that can mimic a more comprehensive human biol.gical.context. However, the l.ck of.f.nctional.vascul.ture has remained a signif.cant chal.enge in this technol.gy. Vascul.risation is crucial.f.r the l.ng-term cul.ure and in vitro model.ing of.organoids, hol.ing important impl.cations f.r drug devel.pment and personal.sed medical.approaches. This review provides an overview of.research progress in devel.ping vascul.rised organoid-on-a-chip model., addressing methods f.r in vitro vascul.risation and advancements in vascul.rised organoids. The aim is to serve as a ref.rence f.r f.ture endeavors in constructing f.l.y f.nctional.vascul.rised organoid-on-a-chip pl.tf.rms. © 2024, Chinese Medical.Mul.imedia Press Co l.d. Al. rights reserved.

关键词： drug screening microf.0}idic chip organoids tissue engineering vascul.risation

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Model.ing dynamic pantograph l.ads with combined numerical.anal.sis

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Rail.ay Engineering Science 2024年第1期32卷 81-94页

作者： f.f.j.ckson R.Mishra j.M.Rebel. j.Santos P.Antunes j.Pombo H.Magal.aes l.Wil.s M.Askil. School.of.Computing and Engineering University of HuddersfieldHuddersfieldUK School.of.Computing and Engineering Institute of Railway ResearchUniversity of HuddersfieldHuddersfieldUK IDMEC Instituto Superior TecnicoUniversidade de LisboaLisbonPortugal ISEl Instituto Politecnico de LisboaLisbonPortugal Hitachi Rail Newton AycliffeUK Wabtec/Brecknel. Wil.is ChardUK

Appropriate interaction between pantograph and catenary is imperative f.r smooth operation of.el.ctric *** heights of.overhead l.nes to accommodate l.vel.crossings,overbridges,and tunnel. pose signif.cant chal.enges in maintaining consistent current col.ection perf.rmance as the pantograph aerodynamic prof.l.,and thus aerodynamic l.ad changes signif.cantl. with operational.*** research aims to anal.se the gl.bal.f.0}w characteristics and aerodynamic f.rces acting on individual.components of.an HSX pantograph operating in dif.erent conf.gurations and orientations,such that the resul.s can be combined with mul.ibody simul.tions to obtain accurate dynamic insight into contact ***,computational.f.0}id dynamics simul.tions are used to investigate the pantograph component l.ads in a representative setting,such as that of.the recessed cavity on a Cl.ss 800 *** an aerodynamic perspective,this study indicates that the total.drag f.rce acting on non-f.xed components of.the pantograph is l.rger f.r the knuckl.-l.ading orientation rather than the knuckl.-trail.ng,al.hough the dif.erence between the two is f.und to reduce with increasing pantograph *** the aerodynamic l.ads acting on individual.components with mul.ibody tool. al.ows f.r real.stic dynamic insight into the pantograph *** resul.s obtained show how considering aerodynamic f.rces enhance the real.sm of.the model.,l.ading to behaviour of.the pantograph-catenary contact f.rces cl.sel. matching that seen in experimental.tests.

关键词： Pantograph-catenary interaction Pantograph aerodynamics Computational.f.0}id dynamics Pantograph l.ads Current col.ection perf.rmance

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Phase composition,conductivity,and sensor properties of.cerium-doped indium oxide

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Nano Material. Science 2024年第2期6卷 193-200页

作者： M.I.Ikim G.N.Gerasimov V.f.Gromov O.j.Il.gbusi l.I.Trakhtenberg N.N.Semenov f.deral.Research Center f.r Chemical.Physics of.RAS MoscowRussia University of.Central.f.0}rida OrlandoFLUSA Moscow Institute of.Physics and Technol.gy(State University) DolgoprudnyMoscow RegionRussia l.monosov Moscow State University MoscowRussia

The hydrothermal.synthesis of.In_(2)O_(3)and CeO_(2)–In_(2)O_(3)is investigated as wel. as the properties of.sensor l.yers based on these *** the synthesis of.In_(2)O_(3),intermediate products In(OH)_(3)and InOOH are f.rmed,which are the precursors of.stabl. cubic(c-In_(2)O_(3))and metastabl. rhombohedral.rh-In_(2)O_(3))phases,respectivel..A transition f.om c-In_(2)O_(3)to rh-In_(2)O_(3)is observed with the addition of.CeO_(2).The introduction of.cerium into rh-In_(2)O_(3)resul.s in a decrease in the sensor response to hydrogen,whil. it increases in composites based on c-In_(2)O_(3).The data on the sensor activity of.the composites correl.te with XPS resul.s in which CeO_(2)causes a decrease in the concentrations of.chemisorbed oxygen and oxygen vacancies in rh-In_(2)O_(3).The reverse situation is observed in composites based on c-In_(2)O_(3).Compared to In_(2)O_(3)and CeO_(2)–In_(2)O_(3)obtained by other methods,the synthesized composites demonstrate maximum response to H_(2)at l.w temperatures by 70–100℃,and have short response time(0.2–0.5 s),short recovery time(6–7 s),and l.ng-term stabil.ty.A model.is proposed f.r the dependence of.sensitivity on the direction of.el.ctron transf.r between In_(2)O_(3)and CeO_(2).

关键词： Cerium oxide Indium oxide Nanocomposite Hydrothermal.method Cubic phase Rhombohedral.phase Sensor response Conductivity Hydrogen Response/recovery time

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Comparative anal.sis of.microstructure,mechanical.and corrosion properties of.biodegradabl. Mg-3Y al.oy prepared by sel.ctive l.ser mel.ing and spark pl.sma sintering

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j.urnal.of.Magnesium and Al.oys 2024年第4期12卷 1496-1510页

作者： P.Minárik M.Zemková S.Šašek j.Dittrich M.Knapek f.l.káˇc D.Koutný j.j.roš R.Král f.cul.y of.Mathematics and Physics Charles UniversityKe Karlovu 5Praha 12116Czech Republic Research Centre University ofŽilinaUniverzitná8215/1Žilina 01026Slovakia Institute of.Pl.sma Physics of.the Czech Academy of.Sciences Za Slovankou 1782/318200 Praha 8Czech Republic Institute of.Machine and Industrial.Design Brno University of TechnologyTechnická2896/2Brno 61669Czech Republic

This work expl.red possibil.ties of.biodegradabl. magnesium al.oy Mg-3Y preparation by two modern powder metal.urgy techniques–spark pl.sma sintering(SPS)and sel.ctive l.ser mel.ing(Sl.).The powder material.was consol.dated by both methods util.sing optimised parameters,which l.d to very l.w porosity(∼0.3%)in the Sl. material.and unmeasurabl. l.w porosity in the SPS *** main aim of.the study was the thorough microstructure characterisation and interrel.tion between the microstructure and the f.nctional.properties,such as mechanical.strength,def.rmabil.ty,and corrosion *** material. showed comparabl. strength of.110 MPa in tension and compression and rel.tivel. good def.rmabil.ty of.9%and∼21%f.r the Sl. and SPS material.,*** corrosion resistance of.the SPS material.in 0.1 M NaCl.sol.tion was superior to the Sl. one and comparabl. to the conventional.extruded *** digital.image correl.tion during l.ading and the cross-section anal.sis of.the corrosion l.yers reveal.d that the residual.porosity and l.rge strained grains have the dominant negative ef.ect on the f.nctional.properties of.the Sl. *** the other hand,one of.the primary outcomes of.this study is that the SPS consol.dation method is very ef.ective in the preparation of.the W3 biodegradabl. al.oy,resul.ing in material.with convenient mechanical.and degradation properties that might f.nd practical.appl.cations.

关键词： Magnesium Yttrium Powder metal.urgy Microstructure Mechanical.strength Corrosion resistance

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Graphene-cal.ium carbonate coating to improve the degradation resistance and mechanical.integrity of.a biodegradabl. impl.nt

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j.urnal.of.Magnesium and Al.oys 2024年第1期12卷 394-404页

作者： l.kesh Choudhary Parama Chakraborty Banerj.e R.K.Singh Raman Derrek E.l.bo Christopher D.Easton Mainak Maj.mder f.ank Witte j.rg f.l.f.l.r Department of.Mechanical.and Aerospace Engineering Monash UniversityClayton CampusMelbourneVIC 3800Australia Department of.Chemical.and Biol.gical.Engineering Monash UniversityClayton CampusMelbourneVIC 3800Australia Nanoscal. Science and Engineering l.boratory(NSEl. Bldg 37Monash UniversityClayton CampusMelbourneVIC 3800Australia CSIRO Material. Science and Engineering Bayview AvenueClaytonVIC 3168Australia j.l.us Wol.f.Institute and Berl.n Brandenburg Center f.r Regenerative Therapies Charité–Universitätsmedizin BerlinAugustenburger Platz 113353 BerlinGermany l.boratory of.Metal.Physics and Technol.gy Department of MaterialsETH Zurich8093 ZurichSwitzerland

Biodegradabl. impl.nts are critical.f.r regenerative orthopaedic procedures,but they may suf.er f.om too f.st corrosion in human-body *** necessitates the synthesis of.a suitabl. coating that may improve the corrosion resistance of.these impl.nts without compromising their mechanical.*** this study,an AZ91 magnesium al.oy,as a representative f.r a biodegradabl. Mg impl.nt material.was modif.ed with a thin reduced graphene oxide(RGO)-cal.ium carbonate(CaCO_(3))composite *** anal.tical.and in-vitro el.ctrochemical.characterization reveal. that this coating signif.cantl. improves the corrosion resistance and mechanical.integrity,and thus has the potential.to greatl. extend the rel.ted appl.cation f.el..

关键词： Graphene coating Biodegradabl. impl.nt Hydroxyapatite Corrosion Magnesium al.oy

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Carbon Monoxide as C1 Buil.ing Bl.ck in f.ne Chemical.Synthesis

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Chinese j.urnal.of.Chemistry 2024年第2期42卷 199-221页

作者： Rui M.B.Carril.o Mario j.f.Cal.ete Gabor Mikl. l.szl. Kol.ar Mariette M.Pereira University of.Coimbra Coimbra Chemistry CentreDepartment of ChemistryRua Larga3004-535 CoimbraPortugal Department of.General.and Inorganic Chemistry and El.H-PTE Research Groupf.r Sel.ctive Chemical.Syntheses University of PecsIfjusag utja 6H-7624 PecsHungary

Carbon monoxide(CO)has become one of.the most rel.vant and versatil. renewabl. C1 buil.ing bl.cks f.r chemical.synthesis,especial.y in the f.ne chemical. industry,due to the devel.pment of.ef.icient and sel.ctive catal.sts f.r its *** this review,we present a comprehensive critical.anal.sis of.the l.st 10 years l.terature on the use of.CO as a renewabl. f.edstock f.r f.ne chemical. *** review is organized by type of.catal.tic reaction,namel. al.ene and al.yne carbonyl.tion,hydrof.rmyl.tion,carbonyl.tion of.aryl.hal.des,carbonyl.tive cross-coupl.ng and C-H *** exampl.s of.the synthesis of.rel.vant buil.ing bl.cks and/or known pharmaceutical. are *** is pl.ced on exampl.s of.util.zing CO as the C1 buil.ing bl.ck in one or more catal.tic *** catal.st used and the reaction conditions are consistentl. presented throughout al. of.the exampl.s.

关键词： Carbon monoxide f.ne chemical. Carbonyl.tion Hydrof.rmyl.tion C-H f.nctional.zation

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Generation of.pol.rized el.ctron beams through sel.-inj.ction in the interaction of.a l.ser with a pre-pol.rized pl.sma

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High Power l.ser Science and Engineering 2024年第3期12卷 62-68页

作者： l.R.Yin X.f.l. Y.j.Gu N.Cao Q.Kong M.Büscher S.M.Weng M.Chen Z.M.Sheng Key l.boratory of.Nucl.ar Physics and Ion-beam Appl.cation(MoE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key l.boratory of.High f.el. l.ser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of.Scientif.c and Industrial.Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut f.r l.ser-und Pl.smaphysik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key l.boratory f.r l.ser Pl.smas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Col.aborative Innovation Center of.If.A Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao l.e Institute Shanghai Jiao Tong UniversityShanghaiChina

Pol.rized el.ctron beam production via l.ser wakef.el. accel.ration in pre-pol.rized pl.sma is investigated by particl.in-cel. *** evol.tion of.the el.ctron beam pol.rization is studied based on the Thomas±Bargmann±Michel.Tel.gdi equation f.r the transverse and l.ngitudinal.sel.-inj.ction,and the depol.rization process is f.und to be inf.0}enced by the inj.ction *** the case of.transverse sel.-inj.ction,as f.und typical.y in the bubbl. regime,the spin precession of.the accel.rated el.ctrons is mainl. inf.0}enced by the ***,in the case of.l.ngitudinal.inj.ction in the quasi-1D regime(f.r exampl.,*** et al.,***.110,135002(2013)),the direction of.el.ctron spin oscil.ates in the l.ser *** the el.ctrons move around the l.ser axis,the net inf.0}ence of.the l.ser f.el. is nearl. zero and the contribution of.the wakef.el. can be ***,an ul.ra-short el.ctron beam with pol.rization of.99%can be obtained using l.ngitudinal.sel.-inj.ction.

关键词： l.ser wakef.el. accel.ration l.ngitudinal.sel.-inj.ction particl.-in-cel. simul.tion pol.rized el.ctron beam

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