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世界核心医学期刊文摘（心脏病学分册） 2005年第8期1卷 18-19页

作者： Kucher N. koo s. Quiroz R. s.Z. Goldhaber 任付先 Cardiovas.ular Divis.on Brigham and Women’ s Hospital 75 Francis St. Boston MA 02115 United States

BACKGROUND: Prophylaxis.agains. deep- vein thrombos.s.in hos.italized patients.remains.underus.d. We hypothes.zed that the us. of a computer- alert program to encourage prophylaxis.might reduce the frequency of deep- vein thrombos.s.among high- ris. hos.italized patients. METHODs. We developed a computer program linked to the patient databas. to identify cons.cutive hos.italized patients.at ris. for deep- vein thrombos.s.in the abs.nce of prophylaxis. The program us.d medical- record numbers.to randomly as.ign 1255 eligible patients.to an intervention group, in which the res.ons.ble phys.cian was.alerted to a patient s.ris. of deep- vein thrombos.s. and 1251 patients.to a control group, in which no alert was.is.ued. The phys.cian was.required to acknowledge the alert and could then withhold or order prophylaxis. including graduated compres.ion s.ockings. pneumatic compres.ion boots. unfractionated heparin, low- molecular- weight heparin, or warfarin. The primary end point was.clinically diagnos.d, objectively confirmed deep- vein thrombos.s.or pulmonary embolis. at 90 days. REs.LTs. More patients.in the intervention group than in the control group received mechanical prophylaxis.10.0 percent vs. 1.5 percent, Ps.23.6 percent vs. 13.0 percent, Ps.4.9 percent) in the intervention group, as.compared with 103(8.2 percent) in the control group; the Kaplan- Meier es.imates.of the likelihood of freedom from deep- vein thrombos.s.or pulmonary embolis. at 90 days.were 94.1 percent(95 percent confidence interval, 92.5 to 95.4 percent) and 90.6 percent(95 percent confidence interval, 88.7 to 92.2 percent), res.ectively(Ps. of deep- vein thrombos.s.or pulmonary embolis. at 90 days.by 41 percent(hazard ratio, 0.59; 95 percent confidence interval, 0.43 to 0.81; P=0.001). CONCLUs.ONs. The ins.itution of a computer- alert program increas.d phys.cians.

关键词：静脉血栓栓塞报警装置肺栓塞血栓发生率普通肝素低分子肝素内科医生气压靴计算机程序预防措施

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婴儿手足搐搦症

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上医学报 1958年第3期 183-186页

作者：顾庆祺张善通上海第一医学院儿科医院

婴儿手足搐搦症又称痙攣性素貭,为婴儿較常見疾病之一。根据佳木斯市李树春、江可明二氏报告,本症占小儿住院病例的2.9％,可見我国北方寒冷地区本症頗为重要。上海地区所見亦不为少。上海第一医学院儿科医院自1952年5月至1957年4月共見... 详细信息

婴儿手足搐搦症又称痙攣性素貭,为婴儿較常見疾病之一。根据佳木斯市李树春、江可明二氏报告,本症占小儿住院病例的2.9％,可見我国北方寒冷地区本症頗为重要。上海地区所見亦不为少。上海第一医学院儿科医院自1952年5月至1957年4月共見125例,占住院总人数0.5％。这些病例的診断都根据年龄、季节和喂养史的特点,結合痙攣症状以及治疗后症状的迅速好轉,并用血液化学証明。

关键词：医学院血钙医学院校血磷稚生

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Influence of alloying elements.on micros.ructure and microhardnes. of Mg-s.-Zn-bas.d alloys

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Trans.ctions.of Nonferrous.Metals.s.ciety of China 2010年第12期20卷 2246-2252页

作者： W. L. CHENG s. PARK W. N. TANG B. s. YOU B. H. koo s.hool of Nano ＆ Advanced Materials.Engineering Changwon National University Changwon 641-773 South Korea Light Metals.Res.arch Group Korea Institute of Materials Science （KIMS） Changwon 641-831 South Korea

The phas. evolution in （88%-91%）Mg-8%s.-l%Zn-X （X=A1, Mn and/or Ce） s.s.em was.analyzed via CALPHAD method and s.mulations.were us.d in precis. s.lection of the chemical compos.tion. The influence of the addition of different alloying elements.s.ch as.A1, Mn and Ce on the micros.ructure and microhardnes. of Mg-8%s.-l%Zn-bas.d alloys.was.inves.igated. Combined addition of A1 and Mn s.ows.features.dis.inct from s.parate addition of A1 or Mn. Additions.of l%AI and l%Mn to bas. alloy res.lt in the formation of mas.ive A1-Mn phas. in a-Mg matrix grains. Addition of Ce element can refme the s.cond eutectic precipitates.and form intermetallic compounds.with s.. Fine rod-like s.-Ce phas. pres.nts.mainly on the grain boundaries.and plays.a role in inhibiting grain growth. The effects.of alloying elements.on Vickers.microhardnes. and indentation s.ze effect of bas. alloy were examined.

关键词： magnes.um alloys alloying elements CALPHAD method hardnes. indentation s.ze effect

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Influence of rare earth on the micros.ructure and age hardening res.ons. of indirect-extruded Mg-5s.-4Zn alloy

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Journal of Rare Earths 2010年第5期28卷 785-789页

作者：程伟丽 PARK s.s.唐伟能 koo B H s.hool of Nano & Advanced Materials.Engineering Changwon National University Light Metals.Res.arch Group Korea Institute of Materials Science (KIMS)

The effects.of Ce addition on the micros.ructure, age hardening res.ons. and mechanical properties.of an indirect-extruded Mg-5wt.%s.-4Zn (TZ54) alloy were inves.igated. Addition of Ce accelerated the aging res.ons. with the peak aging time moving from 300 h in TZ54 to 30 h in Mg-5wt.%s.-4Zn-1Ce (TZE541), while the peak harnes. was.s.milar to each other. The addition of Ce als. caus.d an increas. in the precipitation s.ability during overageing. Though the tens.le s.rength of extruded TZ54 was.improved by t...

关键词： magnes.um alloy extrus.on micros.ructure aging res.ons. rare earths

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Break-up Characteris.ics.of Gelled Propellant s.mulants.with Various.Gelling Agent Contents

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Journal of Thermal s.ience 2010年第6期19卷 545-552页

作者： Inchul Lee Jaye koo Graduate s.udent Korea Aerospace University s.hool of Aeros.ace and Mechanical Engineering Korea Aerospace University

Gel propuls.on s.s.ems.have many advantages.with res.ect to high performance, the energy management of liquid propuls.on s.s.ems. s.orability, high dens.ty impuls., and low leakage of liquid propellants. The atomization proces. provides.s.fficient contact s.rface area between the gelled fuel and oxidizer jets. It is.important to s.udy how injection characteris.ics.of gelled propellants.are related with break-up and s.ray dis.ribution. The break-up and mixing proces.es.are very important in achieving maximum efficiency and neces.itate the careful s.udy of combus.ion ins.ability. Gelled propellants.are non-Newtonian fluids.in which the vis.os.ty is.a function of the s.ear rate, and they have a high dynamic s.ear vis.os.ty which depends.on the amount of gelling agent contents. The pres.nt s.udy has.focus.d on the break-up proces., wave development of ligament and liquid s.eets.formed by impinging jets.with various.gelling agent contents. Es.ecially, the break-up proces.es.of the impinging jets.at the initial conditions.are s.udied. The break-up proces. of like-on-like doublet impinging jets.are experimentally characterized us.ng non-Newtonian liquids.which are mixed by ionized water 98.5 wt%, Carbopol 941 0.5wt% or 1.0wt%, and NaOH(concentration 10%) 1.0wt%. For the like-on-like doublet injector, the generation of a liquid s.eet at the impinging point of two jets.was.obs.rved. The s.ray s.ape with elliptical pattern is.dis.ributed in a perpendicular direction to the momentum vectors.of the jets. Gelled propellant s.mulants.with high vis.os.ty jets.are more s.able and produce les. pronounced s.rface waves.than low vis.os.ty jets. Generally, the break-up length decreas.d due to the increas.ng Reynolds.number. However, s.rface waves.and atomized droplets.increas.d. Gelled propellant s.mulants.from like-on-like doublet impinging jets.have the s.ray s.ape of clos.d rim patterns.at low pres.ure. Als., the rim patterns.of s.ray have no dis.urbances.on the s.ray s.eet. As.the

关键词： gelled propellant s.mulants s.orability low leakage impinging injector rimles. pattern wave-like s.ructure

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Contras. in Fluid M etallogeny between the Tianmas.an Au-s.Depos.t and the Datuans.an Cu Depos.t in Tongling,Anhui Province

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Acta Geologica s.nica(Englis. Edition) 2003年第1期77卷 116-124页

作者： LEE Hyun koo Depatment of Geology Chungnam National University 220 Kungdong Yuseong Ku Taejon 305-764 Republic of Korea

A comprehens.ve contras. of ore-forming geological background and ore-forming fluid features. es.ecially fluid ore-forming proces.es. has.been performed between the Tianmas.an and the Datuans.an ore depos.ts.in Tongling, Anhui Province. The major reas.ns.for the formation of the s.ratabound s.arn Au-s.ore depos.t in Tianmas.an and the s.ratabound s.arn Cu ore depos.t in Datuans.an are analyzed in accordance with this.contras.. The magmatic pluton in Tianmas.an is.rich in Au and poor in Cu, but that in Datuans.an is.rich in Cu and Au. The wallrock s.rata in Tianmas.an contain Au-bearing pyrite layers.with s.me organic s.bs.ance but thos. in Datuans.an contain no s.ch layers. Moreover, the ore-forming fluids.in Tianmas.an are dominantly magmatic ones.at the oxide and s.lfide s.ages. but thos. with high content of Cu in Datuans.an are mainly groundwater fluids. In addition, differences.in compos.tional evolution and phys.cochemical condition variation of the ore-forming fluids.res.lt in gradual dis.ers.on

关键词： fluid inclus.on fluid ore-forming proces. contras. in fluid metallogeny Au-s.ore depos.t Cu ore depos.t magmatic fluid groundwater fluid Tongling Anhui Province

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Genetic Algorithm to Optimize the Des.gn of Main Combus.or and Gas.Generator in Liquid Rocket Engines

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Journal of Thermal s.ience 2014年第3期23卷 259-268页

作者： Min s.n s.ngho Ko Jaye koo Graduate s.udent Korea Aerospace University s.hool of Aeros.ace and Mechanical Engineering Korea Aerospace University

A genetic algorithm was.us.d to develop optimal des.gn methods.for the regenerative cooled combus.or and fuel-rich gas.generator of a liquid rocket engine. For the combus.or des.gn, a chemical equilibrium analys.s.was.applied, and the profile was.calculated us.ng Rao's.method. One-dimens.onal heat trans.er was.as.umed along the profile, and cooling channels.were des.gned. For the gas.generator des.gn, non-equilibrium properties.were derived from a counterflow analys.s. and a vaporization model for the fuel droplet was.adopted to calculate res.dence time. Finally, a genetic algorithm was.adopted to optimize the des.gns. The combus.or and gas.generator were optimally des.gned for 30-tonf, 75-tonf, and 150-tonf engines. The optimized combus.ors.demons.rated s.perior des.gn characteris.ics.when compared with previous.non-optimized res.lts. Wall temperatures.at the nozzle throat were optimized to s.tis.y the requirement of 800 K, and s.ecific impuls.s.were maximized. In addition, the target turbine power and a burned-gas.temperature of 1000 K were obtained from the optimized gas.generator des.gn.

关键词： Liquid Rocket Engine Main Combus.or Gas.Generator Optimization Genetic Algorithm

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Dis.ntegration Proces. and Performance of a Coaxial Porous.Injector

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Journal of Thermal s.ience 2016年第5期25卷 394-401页

作者： Keonwoong Lee Dohun Kim Jaye koo Graduate s.hool Korea Aerospace University s.hool of Aeros.ace and Mechanical Engineering Korea Aerospace University

In order to unders.and the breakup performance of coaxial porous.injectors.the s.rays.of coaxial porous.injectors.with two different porous.material cylinder lengths.were compared with thos. of conventional s.ear coaxial *** allow comparis.n,the wall injection lengths.were des.gned to be equivalent to the value of the reces. *** flow s.rays.were vis.alized us.ng back-lit photography methods.and analyzed quantitatively with a las.r diffraction apparatus.in order to s.udy the effects.of the momentum flux ratio and Weber number on the breakup for each type of *** cas. of the s.ear coaxial injector,the large liquid core was.obs.rved in low air mas. flow rate ***,the des.abilization of the liquid jet from the coaxial porous.injector is.almos. complete within the inner region,near the injector face ***,better breakup performance in low gas.flow rate condition was.obtained when the porous.cylinder length decreas.d,while the s.ear coaxial injectors.s.owed better breakup efficiency when the reces. length *** conclus.on,the different breakup proces. caus.d by the radial momentum in the inner region of the porous.injector dis.ntegrated the liquid core.

关键词： Coaxial porous.injector s.uter mean diameter Droplet s.ze dis.ribution

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Breakup s.ructure of Two-phas. Jets.with Various.Momentum Flux from a Porous.Injector

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Journal of Thermal s.ience 2014年第1期23卷 60-67页

作者： Inchul Lee Dohun Kim Jaye koo Graduate s.udent Korea Aerospace University s.hool of Aeros.ace and Mechanical Engineering Korea Aerospace University

s.ray s.ructure and atomization characteris.ics.were inves.igated through a comparis.n of a porous.and a s.ear coaxial injector. The porous.injector s.ows.better atomization performance than the s.ear coaxial injector. To in- creas. atomization performance and mixing efficiency of two-phas. jets. a coaxial porous.injector which can be applicable to liquid rocket combus.ors.was.des.gned and tes.ed. The characteris.ics.of atomization and s.ray from a porous.and a s.ear coaxial injector were characterized by the momentum flux ratio. The breakup mechanis. of the porous.injector is.governed by Taylor-Culick flow and axial s.ear forces. Momentum of injected gas.flow through a porous.material which is.compos.d of s.ntered metal is.radically trans.erred to the center of the liquid column, and then liquid column is.effectively broken up. Although the s.apes.of s.ray from porous.and s.ear co- axial jets.were s.milar for various.momentum ratio, s.ray s.ructures.s.ch as.s.ray angle and droplet s.zes.were different. As.increas.ng the momentum flux ratio, s.D from the porous.injector s.owed s.aller value than the s.ear coaxial injector

关键词： Porous.injector s.ear coaxial injector Breakup mechanis. Momentum flux ratio

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Mixing Characteris.ics.of Puls.d Air-as.is. Liquid Jet into an Internal s.bs.nic Cros.-flow

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Journal of Thermal s.ience 2010年第2期19卷 136-140页

作者： Inchul Lee Youngs. Kang Jaye koo Graduate s.udent Korea Aerospace University s.hool of Aeros.ace and Mechanical Engineering Korea Aerospace University

Penetration depth,s.ray dis.ers.on angle,droplet s.zes.in breakup proces.es.and atomization proces.es.are very important parameters.in combus.or of air-breathing *** proces.es.will enhance air/fuel mixing ins.de the *** res.lts.from the puls.d air-as.is. liquid jet injected into a cros.-flow are *** experiments.were conducted to a range of cros.-flow velocities.from 42～136 m/*** is.injected with 0～300kPa,with air-as.is. puls.tion frequency of 0～*** frequency was.modulated by s.lenoid *** Doppler Particle Analyzer(PDPA) was.utilized to quantitatively meas.ring droplet ***-s.eed CCD camera was.us.d to obtain injected s.ray *** air-as.is. liquid jet will offer rapid mixing and good liquid jet ***-as.is. makes.a very fine droplet which generated mis.-like *** air-as.is. liquid jet will introduce additional s.pplementary turbulent mixing and control of penetration depth into a cros.-flow *** res.lts.s.ow that puls.tion frequency has.an effect on penetration,trans.ers. velocities.and droplet *** experimental data generated in thes. s.udies.are us.d for a development of active control s.rategies.to optimize the liquid jet penetration in s.bs.nic cros.-flow conditions.and predict combus.ion low frequency ins.ability.

关键词： cros.-flow penetration puls.d air-as.is. liquid jet puls.tion frequency

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