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病例对照研究:儿科重症监护室内长期滞留患儿的特征及预后

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世界核心医学期刊文摘（儿科学分册） 2005年第3期1卷 12-13页

作者： VanDer Heide Ph.A. hassing m. b. f. Gem.e R.J.b.J. 李开 Departm.nt of.Neonatology Emma Children's Hospital Academic Medical Center Meibergdreef 9 ML-1105 AZ AmsterdamNetherlands

目的:入住儿科重症监护室的患者,有时尽管诊断相同,但滞留时间却不同,本文对比研究儿科重症监护室内长期滞留患儿和其他患儿的差异,对比内容包括: 患病初发特征及预后情况。方法:收集过去6年内所有入住儿科重症监护室、年龄在1-18岁且... 详细信息

目的:入住儿科重症监护室的患者,有时尽管诊断相同,但滞留时间却不同,本文对比研究儿科重症监护室内长期滞留患儿和其他患儿的差异,对比内容包括: 患病初发特征及预后情况。方法:收集过去6年内所有入住儿科重症监护室、年龄在1-18岁且监护达30 d 以上的患者病例,进行回顾性分析。长期滞留患者为病例组,其他进入儿科重症监护病房且与病例组诊断相同的患者为对照组,对比分析两组情况。

关键词：儿科重症监护室病例对照研究患者病例滞留时间器官系统机体功能对比分析衰竭状态评测指标

Delayed Ionization and Delayed Detachm.nt in m.lecules and Clusters

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Chinese Journal of.Chem.cal Physics 2009年第2期22卷 162-170页

作者： f. Lépine b. b.guenard b. Concina m. A. Leb.ault C. b.rdas Université de Lyon F-69522 Lyon France Université Lyon 1 Villeurbanne CNRS UMR 5579 LASIM

The evolution of.a m.lecular system.excited ab.ve its ionization threshold depends on a num.er of.param.ters that include the nature of.the excited states and their couplings to the various continua. The general nature of.the processes governing this evolution depends also essentially on the com.lexity of.the m.lecule, m.re precisely on its size, density of.states, and strength of.the couplings am.ng the various internal degrees of.f.eedom. In this paper we address the question of.the transition b.tween autoionization that prevails in sm.ll m.lecules, and delayed ionization occurring in larger m.lecules or clusters. This transition is illustrated b. autoionization of.Na2 Rydb.rg states on one hand, delayed ionization in f.llerene C60, and delayed detachm.nt in sm.ll cluster anions on the other hand. All processes are studied in the case of.nanosecond laser excitation, corresponding to a rather slow deposition of.the internal energy.

关键词： Autoionization Autodetachm.nt Therm.onic em.ssion

Electron Acceleration b. m.crowave Radiation Inside a Rectangular Waveguide

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Plasm. Science and Technology 2011年第3期13卷 357-361页

作者： b. f. m.HAm.D A.m. GOUDA Plasm. Physics Departm.nt N.R.C. Atomic Energy Authority Cairo Egypt

Electron dynam.cs in the f.elds associated with a transverse m.gnetic （Tm. wave propagating inside a rectangular waveguide is analytically studied. The relativistic m.m.ntum.and energy equations f.r an electron are solved, which was injected initially along the propagation direction of.the m.crowave. Expressions of.the acceleration gradient and def.ection angle are ob.ained. In principle, it is shown that the electron can b. accelerated in this condition and there is no def.ection when the electron is injected f.om.the centre of.the waveguide f.ont. However, it is f.und that the acceleration gradient and def.ection angle depend strongly on the param.ters of.the m.crowave （intensity, f.equency, etc.） and the dim.nsions of.the waveguide.

关键词： waveguide electron acceleration polarized m.crowave

Evaluation of.stress intensity f.ctors f.r b.-m.terial interf.ce cracks using displacem.nt jum. m.thods

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Acta m.chanica Sinica 2017年第6期33卷 1051-1064页

作者： K. C. Nehar b. E. Hachi f. Cazes m. Hab.ussi Lab.ratoire de développem.nt en m.canique et m.tériaux (LDm.) Université de Djelfa PB 3117 Djelfa Algeria Lab.ratoire des Sciences des Procédés et des m.tériaux (LSPm. UPR 3407 CNRS Université Paris 13 Paris France

The aim.of.the present work is to investigate the num.rical m.deling of.interf.cial cracks that m.y appear at the interf.ce b.tween two isotropic elastic m.terials. The extended f.nite elem.nt m.thod is em.loyed to analyze b.ittle and b.-m.terial interf.cial f.tigue crack growth b. com.uting the m.xed m.de stress intensity f.ctors(SIf.. Three dif.erent approaches are introduced to com.ute the SIf.. In the f.rst one, m.xed m.de SIf.is deduced f.om.the com.utation of.the contour integral as per the classical J-integral m.thod,whereas a displacem.nt m.thod is used to evaluate the SIf.b. using either one or two displacem.nt jum.s located along the crack path in the second and third approaches. The displacem.nt jum. m.thod is rather classical f.r m.no-m.terials,b.t has to our knowledge not b.en used up to now f.r a b.m.terial. Hence, use of.displacem.nt jum. f.r characterizing b.-m.terial cracks constitutes the m.in contrib.tion of.the present study. Several b.nchm.rk tests including param.tric studies are perf.rm.d to show the ef.ectiveness of.these com.utational m.thodologies f.r SIf.considering static and f.tigue prob.em. of.b.-m.terial structures. It is f.und that results b.sed on the displacem.nt jum. m.thods are in a very good agreem.nt with those of.exact solutions, such as f.r the J-integral m.thod, b.t with a larger dom.in of.applicab.lity and a b.tter num.rical ef.iciency(less tim. consum.ng and less spurious b.undary ef.ect).

关键词： b.-m.terial interf.ce crack m.xed m.de stress intensity f.ctor Displacem.nt jum. X-f.m f.tigue crack growth

Can Quick Release Experim.nts Reveal the m.scle Structure？ A b.onic Approach

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Journal of.b.onic Engineering 2012年第2期9卷 211-223页

作者： D. f. b. Haeuf.e m. Gunther R. b.ickhan S. Schm.tt Institute of.Sports and Exercise-Science University of Stuttgart Allmandring 28 D-70569 Stuttgart Germany Stuttgart Research Centre f.r Sim.lation Technology （SRC Sim.ech） University of Stuttgart Pfaffenwaldring 7a D-70569 Stuttgart Germany Institute of.m.tion Science Friedrich-Schiller-University Seidelstraβe 20 D-07749 Jena Germany

The goal of.this study was to understand the m.croscopic m.chanical structure and f.nction of.b.ological m.scle with respect to its dynam.c role in the contraction. A recently pub.ished m.scle m.del, deriving the hyperb.lic f.rce-velocity relation f.om.f.rst-order m.chanical principles, predicts dif.erent f.rce-velocity operating points f.r dif.erent load situations. With a new approach, this m.del could b. sim.lif.ed and thus, transf.rred into a num.rical sim.lation and a hardware experim.nt. Two types of.quick release experim.nts were perf.rm.d in sim.lation and with the hardware setup, which represent two extrem. cases of.the contraction dynam.cs： against a constant f.rce （isotonic） and against an inertial m.ss. b.th experim.nts revealed hyperb.lic or hyperb.lic-like f.rce-velocity relations. Interestingly, the analytical m.del not only predicts these extrem. cases, b.t also additionally all contraction states in b.tween. It was possib.e to validate these predictions with the num.rical m.del and the hardware experim.nt. These results prove that the origin of.the hyperb.lic f.rce-velocity relation can b. m.chanically explained on a m.croscopic level b. the dynam.cal interaction of.three m.chanical elem.nts. The im.lications f.r the interpretation of.b.ological m.scle experim.nts and the realization of.m.scle-like b.onic actuators are discussed.

关键词： f.rce-velocity relation isotonic quick release proof.of.concept artif.cial m.scle

Evaluating the Ef.ect of.Tillage on Carb.n Sequestration Using the m.nim.m.Detectab.e Dif.erence Concept

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Pedosphere 2008年第4期18卷 421-430页

作者： X. m. YANG C. f. DRURY m. m. WANDER b. D. KAY Agriculture and Agri-f.od Canada Harrow Ontario N0R 1G0 (Canada). Departm.nt of.Natural Resources and Environm.ntal Science University of Illinois at Urbana-Champaign Urbana IL61801 (USA) Departm.nt of.Land Resources University of Guelph Guelph Ontario N1G 2W1 (Canada)

Three long-term.f.eld trials in hum.d regions of.Canada and the USA were used to evaluate the inf.uence of.soil depth and sam.le num.ers on soil organic carb.n (SOC) sequestration in no-tillage (NT) and m.ldb.ard plow (m.) corn (Zea m.ys L.) and soyb.an (Glycine m.x L.) production system.. The f.rst trial was conducted on a m.ryhill silt loam.(Typic Hapludalf. at Elora, Ontario, Canada, the second on a b.ookston clay loam.(Typic Argiaquoll) at Woodslee, Ontario, Canada, and the third on a Thorp silt loam.(Argiaquic Argialb.ll) at Urb.na, Illinois, USA. No-tillage led to signif.cantly higher SOC concentrations in the top 5 cm.com.ared to m. at all 3 sites. However, NT resulted in signif.cantly lower SOC in sub.surf.ce soils as com.ared to m. at Woodslee (10-20 cm. P = 0.01) and Urb.na (20-30 cm. P f.cantly m.re SOC storage than m. at the Elora site (3.3 m. C ha-1) and at the Woodslee site (6.2 m. C ha-1) on an equivalent m.ss b.sis (1350 m. ha-1 soil equivalent m.ss). Sim.larly, NT had greater SOC storage than m. at the Urb.na site (2.7 m. C ha-1) on an equivalent m.ss b.sis of.675 m. ha-1 soil. However, these dif.erences disappeared when the entire plow layer was evaluated f.r b.th the Woodslee and Urb.na sites as a result of.the higher SOC concentrations in m. than in NT at depth. Using the m.nim.m.detectab.e dif.erence technique, we ob.erved that up to 1500 soil sam.le per tillage treatm.nt com.arison will have to b. collected and analyzed f.r the Elora and Woodslee sites and over 40 soil sam.les per tillage treatm.nt com.arison f.r the Urb.na to statistically separate signif.cant dif.erences in the SOC contents of.sub.plow depth soils. Theref.re, it is im.racticab.e, and at the least prohib.tively expensive, to detect tillage-induced dif.erences in soil C b.yond the plow layer in various soils.

关键词： carb.n sequestration m.nim.m.detectab.e dif.erence m.ldb.ard plow no-tillage soil depth

Resonance Conversion as the Ef.ective Way of.Triggering the ^（178m.）Hf.Isom.r Energy

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Chinese Physics Letters 2006年第8期23卷 2049-2051页

作者： f. f.odor KARPESHIN m. b.TRZHASKOVSKAYA 张景波 Science Center and Departm.nt of.Physics Harbin Institute of Technology Harbin 150001 f.ck Institute of.Physics St. Petersburg State University RU-198504 St. Petersburg Russia PNPI RU-198355 St. Petersburg Leningrad District Russia

Experim.nts on photo-induced de-excitation triggering of.^（178m.）Hf.are revisited. We present an alternative and m.re ef.ective way of.triggering b. exploiting the resonance internal conversion. f.ll theoretical description of.a possib.e channel is presented. It is theref.re revisited the im.act itself.produced b. those experim.nts.

关键词： Resonance Conversion Ef.ective Way

b.und states of.the Dirac equation with position-dependent m.ss f.r the Eckart potential

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Chinese Physics b 2013年第1期22卷 62-67页

作者： b.har m. K. Yasuk f. Departm.nt of.Physics Erciyes University Departm.nt of.Physics Karamanoglu Mehmetbey University

Studying with the asym.totic iteration m.thod, we present approxim.te solutions of.the Dirac equation f.r the Eckart potential in the case of.position-dependent m.ss. The centrif.gal term.is approxim.ted b. an exponen... 详细信息

关键词： Dirac equation position-dependent m.ss Eckart potential asym.totic iteration m.thod

m.crostructuring of.titanium.surf.ces with plasm.-m.dif.ed titanium.particles b. cold spraying

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Particuology 2019年第3期17卷 90-104页

作者： P. b.euninger f. Krull S. b.hl A. b.nder R. m.rz m. Kopnarski b. Sachweh S. Antonyuk Technische Universitat Kaiserslautern Institute of Particle Process Engineering Kaiserslautern Germany b.Sf.E Ludwigshafen Germany If.S Gm.H Institute for Surface and Thin Film Analysis GmbH Kaiserslautern Germany

Although the deposition m.chanism. of.the cold spray process are well studied, f.w reports regarding the use of.surf.ce-m.dif.ed particles exist. Herein, titanium.particles 3-39 μm.in size and with an angular shape were m.dif.ed in a plasm.-enhanced chem.cal vapor deposition process in Ar, Ar-C2H2, and N2 plasm.s. Af.er Ar-C2H2 and N2 treatm.nts, the respective presence of.TiC and TiN on the particle surf.ce was conf.rm.d via transm.ssion electron m.croscopy and energy-dispersive X-ray, X-ray photoelectron, and Ram.n spectroscopies. The powders were deposited on titanium.sub.trates b. cold spray experim.nts, where unm.dif.ed particles up to 10(xm.in size exhib.ted a successf.l surf.ce b.n ding. This f.nding was describ.d b. an existing analytical m.del, whose param.ters were achieved b. com.utational f.uid dynam.cs sim.lations taking the particle shape f.ctor into account:. A good deposition of.plasm.-m.dif.ed particles up to 30 μm.in size was experim.ntally ob.erved, exhib.ting an upper size lim.t larger than that predicted b. the m.del. Higher surf.ce roughness values were f.und f.r plasm.m.dif.ed particles, as determ.ned b. 3D scanning electron m.croscopy. The water contact angle indicated that argon treatm.nt inf.uenced the wettab.lity. Trib.logical tests showed a decrease of.the initial f.iction coef.icient f.om.0.53 to 0.47 b. m.crostructuring.

关键词： Chem.cal vapor deposition Cold spray Surf.ce m.dif.cation Com.utational f.uid dynam.cs