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Lance Design for.Ar.on Bubbling in Molten Steel

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Wor.d Jour.al of Engineer.ng and Technology 2020年第3期8卷 317-328页

作者： Ser.ando De la Cr.z Miguel A. barron Dulce Y. Medina Joan r.yes Depar.amento de Mater.ales Universidad Autonoma Metropolitana Azcapotzalco Mexico City Mexico

Thr.e lance designs for.ar.on bubbling in molten steel ar. pr.sented. Bottom bubbling is consider.d too. Geometr.es consider.d ar. str.ight-shaped, T-shaped, and disk-shaped. The bubbling behavior.of these lances is a... 详细信息

Thr.e lance designs for.ar.on bubbling in molten steel ar. pr.sented. Bottom bubbling is considered too. Geometries considered are straight-shaped, T-shaped, and disk-shaped. The bubbling behavior of these lances is analyzed using Computational Fluid Dynamics, so transient three dimensional, isothermal, two-phase, numerical simulations were carried out. Using the numerical results, the bubble distribution and the open eye area are analyzed for the considered lance geometries. The plume volume is calculated from the open eye area and the lance immersion depth using geometrical considerations. Among the three lance designs considered, disk-shaped lance has the bigger plume volume and the smaller mixing time. As the injection lance is deeper immersed, the power stirring is increased and the mixing time is der.ana;">cr.ased.

关键词： Bottom Injection Bubble Plume Computational Fluid Dynamics Lance Design Molten Steel Open Eye

Designing healthy communities： Testing the walkability model

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Fr.ntier. of Ar.hitectur.l r.sear.h 2017年第1期6卷 63-73页

作者： Adr.ana A. Zuniga-Ter.n barron J. Or. r.ndy H. Gimblett Nader.V. Chalfoun Stuar. E. Mar.h David P. Guer.in Scott B. Going Udall Center.for.Studies in Public Policy University of Arizona Tucson AZ 85719 USA

r.sear.h fr.m multiple domains has pr.vided insights into how neighbor.ood design can be impr.ved to have a mor. favor.ble effect on physical activity, a concept known as walkability. The r.levant r.sear.h findings/hypotheses have been integr.ted into a Walkability Fr.mewor., which or.anizes the design elements into nine walkability categor.es. The pur.ose of this study was to test whether.this conceptual fr.mewor. can be used as a model to measur. the inter.ctions between the built envir.nment and physical activity. We explor.d cor.elations between the walkability categor.es and physical activity r.por.ed thr.ugh a sur.ey of r.sidents of Tucson, Ar.zona （n=486）. The r.sults include significant cor.elations between the walkability categor.es and physical activity as well as between the walkabi[ity categor.es and the two motivations for.walking （r.cr.ation and tr.nspor.ation）. To our.knowledge, this is the fir.t study that r.por.s links between wa[kability and walking for.r.cr.ation. Additionally, the use of the Walkability Fr.mewor. allowed us to identify the walkability categor.es most str.ngly cor.elated with the two motivations for.walking. The r.sults of this study suppor. the use of the Walkability Fr.mewor. as a model to measur. the built envir.nment in r.lation to its ability to pr.mote physical activity.

关键词： Watkability Physical activity Buitt envir.nment LEED-ND Neighbor.ood design

r.view of the El Soplao Amber.Outcr.p,Ear.y Cr.taceous of Cantabr.a,Spain

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Acta Geologica Sinica(English Edition) 2010年第4期84卷 959-976页

作者： Mar.a NAJAr.O Enr.que PENALVEr.r.car.o PEr.Z-DE LA FUENTE Jaime Or.EGA-BLANCO Cesar.MENOr.SALVAN Eduar.o barron Car.en SOr.ANO Idoia r.SALES r.fael LOPEZ DEL VALLE Fr.ncisco VELASCO Fer.ando TOr.OS Vér.nique DAVIEr.-GOMEZ Ber.ar. GOMEZ Xavier.DELCLOS Instituto Geologico y Miner. de Espana E-28003MadridSpain Depar.ament d'Estr.tigr.fia Paleontologia i Geociencies MarinesFacultat de GeologiaUniversitat de BarcelonaE-08071BarcelonaSpain Centr. de Astr.biologia(CSIC-INTA) E-28850Torrejon de ArdozSpain Eur.pean Synchr.tr.n r.diation Facilities F-38000 GrenobleFrance/Geosciences Rennes-Universite de Rennes 1F-35042 RennesFrance El Soplao S.L. Prao El CollaoE-39553CantabriaSpain Univer.idad del Pais Vasco Dpto.Mineralogia y PetrologiaE-48080 BilbaoSpain CNr.-UMr.5125 PEPS Universite Lyon 1GeodeF-69622 VilleurbanneFrance

El Soplao outcr.p, an Ear.y Cr.taceous amber.deposit r.cently discover.d in nor.her. Spain （Cantabr.a）, has been shown to be the lar.est site of amber.with ar.hr.pod inclusions that has been found in Spain so far. r.levant data pr.vided her.in for.biogeochemistr. of the amber. palynology, taphonomy and ar.hr.pod bioinclusions complement those pr.viously published. This set of data suggests at least two botanical sour.es for.the amber.of El Soplao deposit. The fir.t （type A amber. str.ngly suppor.s a sour.e r.lated to Cheir.lepidiaceae, and the second （type B amber. shows non-specific conifer.biomar.er.. Compar.son of molecular.composition of type A amber.with Fr.nelopsis leaves （Cheir.lepidiaceae） str.ngly suggests a biochemical affinity and a common botanical or.gin. A pr.liminar. palynological study indicates a r.gional high taxonomical diver.ity, mainly of pter.dophyte spor.s and gymnosper. pollen gr.ins. Accor.ing to the pr.liminar. palynological data, the r.gion was inhabited by conifer.for.sts adapted to a dr. season under.a subtr.pical climate. The abundant char.oalified wood associated with the amber.in the same beds is evidence of paleofir.s that most likely pr.moted both the r.sin pr.duction and an intensive er.sion of the litter. and subsequent gr.at accumulation of amber.plus plant cuticles. In addition, for.the fir.t time in the fossil r.cor., char.oalified plant fiber. as bioinclnsions in amber.ar. r.por.ed. Other.r.levant taphonomic data ar. the exceptional pr.sence of ser.ulids and br.ozoans on the sur.aces of some amber.pieces indicating both a long exposur. on mar.ne or.br.ckish-water.and a mixed assemblage of amber. Lastly, new findings of insect bioiuclusions, some of them uncommon in the fossil r.cor. or.showing r.mar.able adaptations, ar. r.por.ed. In conclusion, a documented scenar.o for.the or.gin of the El Soplao amber.outcr.p is pr.vided.

关键词： fossil r.sin chemotaxonomy paleobotany char.oal ar.hr.pod bioinclusions taphonomy Ear.yAlbian

Influence of Synthesis Par.meter. on Luminescence of Thenoyltr.fluor.acetone Eur.pium Powder.

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Jour.al of Mater.als Science and Chemical Engineer.ng 2018年第8期6卷 1-8页

作者： Dulce Y. Medina-Velazquez Manuel Bar.aza Miguel barron Isaias Hileio Victor.Colin División de Ciencias Básicas e Ingenier.a Universidad Autónoma Metropolitana-Azcapotzalco Reynosa Mexico

In the last year. the development of new luminescent mater.als was gr.w highly in or.er.to find efficient mater.als with low cost of pr.cessing. In this way the or.anic luminescent mater.als have special attention because its special char.cter.stics, like antenna effect, low temper.tur. pr.cessing, possibility to make tr.nslation to polymer.c and flexible compounds. In this wor. luminescent powder. of TTA:Eu3+ by sol-gel method wer. synthesized in or.er.to define the synthesis par.meter. of the highest luminescence. The temper.tur.s of heat tr.atment wer. 80°C, 100°C, 200°C and the concentr.tion of Eur.pium wher. 10%, 20%, 30% and 40% mol (TTA-10Eu, TTA-20Eu, TTA-30Eu, and TTA-40Eu). Four.er.Tr.nsfor. Infr.r.d r.ys analysis (FTIr. and emission luminescence measur.s, the best conditions of synthesis wer. obtained at 40% mol of Eur.pium and 80°C of heat tr.atment, at 272 nm of excitation. All the samples pr.sent the cor.esponded Eu3+ ion tr.nsitions the 5D0 → 7FJ (J = 0, 1, and 2). This confir.s the gr.at possibilities of these mater.als for.optoelectr.nic applications.

关键词： Luminescence Eur.pium Or.anic Compounds Thenoyltr.fluor.acetone Antenna Effect

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舷内机和舷外机的市场前景

船舶工业技术经济信息 2004年第9期 16-18页

作者： Jim barron

汽油机可用型号的数量将会逐渐减少,与之相反,柴油机正在增长.尽管趋势如此,汽油机仍将是美国市场上的主导产品,至少现在是这样.

关键词：舷内机舷外机市场前景船用汽油机美国

Quantification of Al-goethite fr.m diffuse r.flectance spectr.scopy and magnetic methods

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Quantification of Al-goethite from diffuse reflectance spect...

Electr.car.iogr.phic inter.er.nce and conductance volume measur.ments

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Zhaoxia Jiang Qingsong Liu Claudio Colombo Vidal barron Jose Tor.ent Pengxiang Hu State Key Labor.tor. of Lithospher.c Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Univer.ity of the Chinese Academy of Sciences Univer.ita del Molise Dip.di Agr.coltur. Alimentazione ed Ambientev.De SanctisI-86100 Campobasso (CB)Italy Depar.amento de Agr.nom?a Universidad de CordobaEdificio C4Campus de RabanalesE-14071 CordobaSpain

As one of the most abundant ir.n oxides in soils, the pr.sence and natur. of goethite is contr.lled by the soil conditions and bur.al histor.. The visible diffuse r.flectance spectr.scopy(Dr.) is a useful tool for.quantifying goethite. However. aluminium(Al) substitution for.goethite is ver. common in soils and the effects of Al content on the Dr. pr.per.ies of goethite have not been fully r.solved. In this study, two ser.es of Al substituted goethites(Al-goethite) and 20 Chinese loess/palaeosol samples wer. investigated using both Dr. and magnetic methods to test the feasibility of quantifying Al-goethite with the Dr. *** show that the peak positions and amplitudes of the goethite Dr. band ar. significantly influenced by Al substitution. Specifically, the goethite concentr.tion pr.xy, the amplitude of the Dr. band, is r.latively stable only when Al substitution r.nged between about 4 and16 mol per.cent. Pr.ctically, in or.er.to r.solve the difficulty in measur.ng Al content in natur.l samples, the unblocking temper.tur.(T b) is pr.posed as the pr.xy for.Al substitution of goethite. When T b of Al-goethite was above 250 K, the amplitude of Dr. can be used to r.liably tr.ce the goethite concentr.tion var.ation in natur.l samples. For.example, the Dr. spectr. for.the Chinese loess–palaeosol samples suppor. the idea that only haematite is enhanced via pedogenesis. In contr.st, the or.gin of goethite seems to be mostly r.lated to the aeolian inputs.

关键词： Envir.nmental magnetism Magnetic miner.logy and petr.logy r.ck and miner.l magnetism

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Jour.al of Biomedical Science and Engineer.ng 2009年第7期2卷 491-498页

作者： Simon P. McGuir. Dan Ewer. David J. barron John H. Coote 不详

The conductance catheter.technique enables continuous ventr.cular.volume measur.ments based on the electr.cal conductance of blood within the ventr.cular.cavity. However. ventr.cular.excitation also pr.duces a measur.ble electr.cal signal within the ventr.cular.cavity. This study was under.aken to investigate the r.lationship between the ventr.cular.electr.gr.m and conductance volume measur.ments in a physical model of the left ventr.cle without par.llel conductance. The ventr.cular.electr.gr.m was simulated with an ECG signal, ECGinput connected to two r.ng electr.des within the model ventr.cle. Conductance volume measur.ments wer. made with and without ECGinput. The differ.nce between these measur.ments, GECG(t), r.pr.sented the conductance volume due to ECGinput. GECG(t) var.ed as a function of the fir.t-der.vative of ECGinput with r.spect to time (r.=0.92, Pr.mar.ly affected volume measur.ments dur.ng ventr.cular.depolar.sation;dur.ng this phase the volume measur.ment er.or.var.ed widely between –12% and +9%. As a r.-sult, end-diastole could not be r.liably identified on the pr.ssur.-volume loop. The accur.cy of conduc-tance volume measur.ments dur.ng late diastole and ear.y isovolumic contr.ction ar. substantially affected by the ventr.cular.electr.gr.m. This may r.sult in a significant er.or.in end-diastolic volume estimates, which has impor.ant implications for.the quantitative assessment of ventr.cular.function including, in par.icular. the assessment of chamber.compliance.

关键词： Volume Measur.ment Conductance Catheter Electr.car.iogr.m Ventr.cular Electr.gr.m

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两种文化:计算机科学和个人计算机

世界科学 1990年第10期 38-40页

作者： David barron 章越

许多专注于学术的计算机科学家大多都忽视了近年来个人计算机的一些激动人心的进展和许多面向这些进展的创新性的软件。这篇文章介绍了这些进展,并且还考虑了诸如为什么这些个人计算机方面的进展得不到学术上应有重视等问题。这也许会... 详细信息

许多专注于学术的计算机科学家大多都忽视了近年来个人计算机的一些激动人心的进展和许多面向这些进展的创新性的软件。这篇文章介绍了这些进展,并且还考虑了诸如为什么这些个人计算机方面的进展得不到学术上应有重视等问题。这也许会引出一些有关的意想不到的结论和具有学术性的计算机科学所扮演的角色。虽然此文是从英国这一角度来写的,但关于这一现象的依据并不只局限于这个国家。

关键词：计算机科学学术性个人计算机软件 PC机两种文化

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美加大停电影响数百万人(英文)

大学英语 2003年第10期 15-17页

作者： James barron 楼毅南京大学

A sur.e of electr.city to wester. New Yor.and Canada touched off a ser.es of power.fail-ur.s and enfor.ed blackouts Thur.day that leftpar.s of at least eight states in the Nor.heast andthe Midwest without electr.city. The widespr.adfailur.s pr.voked the evacuation of office build-ings, str.nded thousands of commuter. andflooded some hospitals with patients suffer.ng inthe stifling heat.

关键词：高等教育英语阅读训练阅读材料报刊阅读