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Numer.cal Simulation of a Batch-Type r.heating Fur.ace

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Wor.d Jour.al of Engineer.ng and Technology 2018年第4期6卷 713-722页

作者： Fr.ncisco J. Nava Miguel A. barron Dulce Y. Medina Depar.amento de Mater.ales Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

A numer.cal analysis of a batch-type r.heating fur.ace with and without ther.al load was car.ied out using the Computational Fluid Dynamics technique. The fur.ace has two pr.mixed bur.er. and methane is used as fuel. Pr.vious to the numer.cal exper.ments, a mesh conver.ence test was car.ied out and the aver.ge inter.al fur.ace temper.tur. and the exhaust gases temper.tur. wer. monitor.d as function of the number.of cells in the discr.tized system. The influence of the Air.Fuel r.tio, the position of the bur.er., and the ther.al load on the aver.ge inter.al temper.tur., the exhaust gases temper.tur., and the molar.fr.ction of methane and oxygen in the exhaust gases was numer.cally explor.d.

关键词： Air.Fuel r.tio CFD Simulation Exhaust Gas Numer.cal Simulation Pr.mixed Bur.er r.heating Fur.ace Ther.al Load

Computer.Analysis of a Methane Fir.d Cr.cible Fur.ace

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Open Jour.al of Applied Sciences 2018年第6期8卷 203-210页

作者： Fer.ando Santiago Miguel A. barron Isaias Hiler.o Dulce Y. Medina Depar.amento de Mater.ales Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

Two design factor. and one oper.tion par.meter.of a methane fir.d cr.cible fur.ace ar. numer.cally explor.d in this wor.. These ar. the number.of bur.er., the location of the exhaust gas exit, and the air.fuel r.tio, r.spectively. Thr.e dimensional steady state Computational Fluid Dynamics simulations ar. car.ied out in or.er.to analyze the influence of the above factor. on the mean cavity temper.tur. in absence of ther.al load, the methane content and the oxygen content of the exit gas.

关键词： Air.Fuel r.tio Computational Fluid Dynamics Cr.cible Fur.ace Exit Gas Composition Mean Temper.tur. Numer.cal Simulations

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《变异语用学》介绍

当代语言学 2012年第2期14卷 190-193页

作者： Klaus P.Schneider.Anne barron 任育新陈新仁南京大学外国语学院

1．前言《变异语用学：聚焦多中心语言的地域变体》（Var.ational Pr.gmatics：A Focus on r.gional Var.eties in Plur.centr.c Languages）是2008年John Benjamins出版公司出版的Pr.gmatics ＆ Beyond New

关键词：语用学变异 Beyond 出版公司 2008年地域变体多中心前言

牙龈卟啉单胞菌超声提取物对hPDLSCs表达VEGF的影响

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实用口腔医学杂志 2007年第2期23卷 176-179页

作者：侯建霞邵磊 Peter.M Loomer.barron Hong 北京大学口腔医学院牙周科 100081 东风汽车公司襄樊医院口腔科美国加利福尼亚大学旧金山分校牙周科

目的:观察牙龈卟啉单胞菌(Por.hyr.monas gingivalis,Pg)超声提取物对人牙周膜干细胞(human per.iodontal ligament stem cells,hPDLSCs)表达血管内皮生长因子(vascular.endothelial gr.wth factor.VEGF)及基质金属蛋白酶-9(matr.x metallopr.teinase-9,MMP-9)的影响。方法:标准厌氧培养环境下培养Pg,收集细菌菌落,离心,制备细菌的超声提取物,然后以不同的浓度加入hPDLSCs的培养液中。培养6d,分别观察第2、4、6天时hPDLSCs的增殖情况。提取蛋白并用Wester. Blotting法检测VEGF和MMP-9的表达。结果:与对照组相比,第2天时,10μg/ml和100μg/mlPg轻度促进hPDLSCs的生长,第4天时,10μg/ml和100μg/mlPg则明显抑制hPDLSCs的生长(P<0.05),第6天时,3种浓度的Pg均明显抑制hPDLSCs的生长(P<0.05);1μg/ml和10μg/mlPg上调VEGF的表达,100μg/mlPg明显抑制VEGF的表达;3种浓度的Pg均上调hPDLSCs中MMP-9的表达。结论:作为牙周炎病原菌,大量的Pg可能通过抑制hPDLSCs的生长增殖,抑制局部血管重建以及加速细胞外基质的降解而降低了牙周组织的自我修复能力。

关键词：牙周膜干细胞牙龈卟啉单胞菌血管内皮生长因子基质金属蛋白酶

Calibr.ting volume measur.ments made using the dual-field conductance catheter

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Jour.al of Biomedical Science and Engineer.ng 2009年第7期2卷 484-490页

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

The conductance catheter.technique allows r.al- time measur.ments of ventr.cular.volume based on changes in the electr.cal conductance of blood within the ventr.cular.cavity. Conductance volume measur.ments ar. cor.ected with a calibr.tion coefficient, α, in or.er.to impr.ve accur.cy. However. conductance volume measur.ments ar. also affected by par.llel conductance, which may confound cali-br.tion coefficient estimation. This study was un-der.aken to examine the var.ation in α using a physical model of the left ventr.cle without par.llel conductance. Calibr.tion coefficients wer. calculated as the conductance-volume quotient (αV(t)) or.the str.ke conductance-str.ke volume quotient (αSV). Both calibr.tion coefficients var.ed as a non-linear.function of the ventr.cular.volume. Conductance volume measur.ments calibr.ted with αV(t) estimated ventr.cular.volume to within 2.0 ±6.9%. By contr.st, calibr.tion with αSV substantially over.estimated the ventr.cular.volume in a volume-dependent manner. incr.asing fr.m 26 ±20% at 100ml to 106 ±36% at 500ml. The accur.cy of conductance volume measur.ments is affected by the choice of calibr.tion coefficient. Using a fixed or.constant calibr.tion coeffi-cient will r.sult in volume measur.ment er.or.. The conductance-str.ke volume quotient is associated with par.icular.y significant and volume-dependent measur.ment er.or.. For.this r.ason, conductance volume measur.ments should ideally be calibr.ted with an alter.ative measur.ment of ventr.cular.vol-ume.

关键词： Conductance Catheter Calibr.tion Volume Measur.ment

Designing healthy communities： A walkability analysis of LEED-ND

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Fr.ntier. of Ar.hitectur.l r.sear.h 2016年第4期5卷 433-452页

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

Pr.vailing city design in many countr.es has cr.ated sedentar. societies that depend on automobile use. Consequently, ar.hitects, ur.an designer., and land planner. have developed new ur.an design theor.es, which have been incor.or.ted into the Leader.hip in Ener.y and Envir.nmental Design for.Neighbor.ood Development （LEED-ND） cer.ification system. The LEED- ND includes design elements that impr.ve human well-being by facilitating walking and biking, a concept known as walkability. Despite these positive developments, r.levant r.sear.h findings fr.m other.fields of study have not been fully integr.ted into the LEED-ND. Accor.ing to Zuniga-Ter.n （2015）, r.levant walkability r.sear.h findings fr.m multiple disciplines wer. or.anized into a walkability fr.mewor. （WF） that or.anizes design elements r.lated to physical activity into nine categor.es, namely, connectivity, land use, density, tr.ffic safety, sur.eil- lance, par.ing, exper.ence, gr.enspace, and community. In this study, we analyze walkability in the LEED-ND thr.ugh the lens of the nine WF categor.es. Thr.ugh quantitative and qualitative analyses, we identify gaps and str.ngths in the LEED-ND and pr.pose potential enhancements to this cer.ification system that r.flects what is known about enhancing walkability mor. compr.hensively thr.ugh neighbor.ood design analysis. This wor. seeks to facilitate the tr.nslation of r.sear.h into pr.ctice, which can ultimately lead to mor. active and healthier.societies.

关键词： Watkabitity LEED-ND Physical activity Ur.an design Well-being Built envir.nment

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视网膜移植后免疫电镜标本的制备及改良方法

中华眼底病杂志 2006年第4期22卷 267-268页

作者：彭清曾水清 James Chen Er.esto J.barron 华中科技大学同济医学院附属协和医院眼科美国南加州大学Keck医学院Doheny眼科研究所

视网膜移植的实验和临床研究是目前国内外研究的热点之一,但视网膜移植后,如何制备良好的免疫组织化学及透射电子显微镜标本从而清晰显示移植物与供体之间的突触连接在国内还未见报道,国外文献报道也较少见[1-4].现将我们在实验中摸索... 详细信息

视网膜移植的实验和临床研究是目前国内外研究的热点之一,但视网膜移植后,如何制备良好的免疫组织化学及透射电子显微镜标本从而清晰显示移植物与供体之间的突触连接在国内还未见报道,国外文献报道也较少见[1-4].现将我们在实验中摸索出的大鼠视网膜移植后免疫组织化学及透射电子显微镜标本制备方法简介如下。

关键词：视网膜/移植标本制备/方法电子显微镜检查免疫组织化学

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