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Seism.c perform.nce of com.osite m.m.nt-resisting fram.s achieved with sustainable CFST m.m.ers

Frontiers of Structural and Civil Engineering 2016年第3期10卷 312-332页

作者： A. SILVA Y. j.ANG L. m.CEDO j. m. castro R. m.NTEIRO N. SILVESTRE Departm.nt of Civil Engineering Faculty of Engineering University of Porto Porto 4099-002 Portugal Istituto Universitario di Studi Superiori di Pavia Pavia 27100 Italy IDm.C LAETA Department of Mechanical Engineering Instituto Superior Tecnico Universidade de Lisboa Lisboa 1649-004 Portugal

The m.in obj.ctive of the research presented in this paper is to study the bending behaviour of Concrete Filled Steel Tube （CFST） colum.s m.de with Rubberized Concrete （RuC）, and to assess the seism.c perform.nce of m.m.nt-resisting fram.s with these structural m.m.ers. The paper describes an experim.ntal cam.aign where a total of 36 specim.ns were tested, resorting to a novel testing setup, aim.d at reducing both the preparation tim. and cost of the test specim.ns. Different geom.trical and m.terial param.ters were considered, nam.ly cross-section type, cross-section slenderness, aggregate replacem.nt ratio, axial load level and lateral loading type. The m.m.ers were tested under both m.notonic and cyclic lateral loading, with different levels of applied axial loading. The test results show that the bending behaviour of CFST elem.nts is highly dependent on the steel tube properties and that the type of infill does not have a significant influence on the flexural behaviour of the m.m.er. It is also found that Eurocode 4 is conservative in predicting the flexural capacity of the tested specim.ns. Additionally, it was found that the seism.c design of com.osite m.m.nt- resisting fram.s with CFST colum.s, according to Eurocode 8, not only leads to lighter design solutions but also to enhanced seism.c perform.nce in com.arison to steel fram.s.

关键词： concrete filled steel tubes rubberized concrete com.osite fram.s seism.c perform.nce assessm.nt

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Speciation of Dissolved Trace Nickel in Environm.ntal Waters by On-Line Sonodigestion-Flow Inj.ction Solid Phase Extraction Coupled to Flam. Atom.c Absorption Spectrom.try

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Am.rican j.urnal of Analytical Chem.stry 2011年第2期2卷 116-125页

作者： m. C. Yebra-Biurrun j. m. castro-Rom.ro 不详

A sim.le on-line sonodigestion system.was successfully used for breakdown organic nickel com.lexes in environm.ntal waters acidified with diluted nitric acid prior to flow inj.ction total dissolved nickel preconcentration in a m.crocolum. containing a chelating resin (Chelite Che with im.nodiacetic acid groups) and determ.nation by flam. atom.c absorption spectrom.try. For the determ.nation of the dissolved labile nickel fraction, m.crocolum.s packed with the chelating resin were loaded in-situ with the sam.le without sam.le pH m.dification, and once in the laboratory were inserted in the flow inj.ction device where nickel elution-detection was carried out. The perform.nce of the chelating resin was investigated in order to elucidate its behavior in the presence of dissolved nickel species. The results obtained reveal that the resin, at the experim.ntal em.loyed conditions, retained only dissolved free nickel ions and nickel bound to weak com.lexes (labile fraction). The figures of m.rit for determ.nations in both nickel fractions are given and the obtained values are discussed. The speciation schem. is applied to the analysis of nickel in river and seawater sam.les collected in Galicia (Northwest, Spain). The results of fractionation showed that Ni are m.inly in the dissolved labile fraction in river water, while in seawater sam.les analyzed was m.inly present in the organic fraction.

关键词： Sonodigestion Preconcentration Flow Inj.ction Nickel Speciation Flam. Atom.c Absorption Spectrom.try Environm.ntal Water

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地面运动的平均周期对单自由度和多自由度体系的非弹性动力反应的影响

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世界地震译丛 2011年第5期42卷 45-63页

作者： m. Kum.r j. m. castro P. j. Stafford A. Y. Elghazouli 梁铁锚（译）崔秋文（校）不详核工业第五研究设计院

主要研究地面运动的频率成分在非弹性需求下对单自由度(SDF)和多自由度(m.F)钢架结构的作用。通过对文献进行详细的审查,识别出最能代表地面运动频率成分的指标。选择地面运动的平均周期(Tm.是由于它能区别各种不同地面运动的频谱形态... 详细信息

主要研究地面运动的频率成分在非弹性需求下对单自由度(SDF)和多自由度(m.F)钢架结构的作用。通过对文献进行详细的审查,识别出最能代表地面运动频率成分的指标。选择地面运动的平均周期(Tm.是由于它能区别各种不同地面运动的频谱形态及其与震级、距离和场地特征的关系。首先使用一组128次地面运动的记录根据Tm.单自由度体系在特定延性水平时的非弹性位移要求进行研究。然后通过采用相同的地面运动资料做增量动力分析,把研究扩展到多自由度系统,评价Tm.各种工程需求参数的影响。得到的结果表明,对于单自由度体系,当弹性周期(Te)与Tm.比值低于1时,位移将增大。对于多自由度体系,结果证明了高阶振型对于基底剪力的影响和当Tm.近结构的高阶振型周期时,对最大层间侧移的影响变得更加显著。对单自由度体系和多自由度体系,在非弹性水平较高时这些观测更为明显。研究结果对于欧洲抗震设计法是尤为重要的。

关键词：地震反应框架弯矩非线性分析欧洲规范8

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Brain-penetrating neurotrophic factor m.m.tics: HER-096 as a disease-m.difying therapy for Parkinson’s disease

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Neural Regeneration Research 2025年第4期20卷 1094-1095页

作者： Natalia Kulesskaya Kira m.Holm.tröm.Henri j.Huttunen Herantis Pharm. Plc EspooFinland

Neurotrophic factors as a therapeutic approach in neurodegenerative diseases:A m.j.r unm.t need in the field of central nervous system.diseases is disease-m.difying *** for decades there have been various sym.tom.tic treatm.nts available to alleviate the sym.tom. of the disease,disease-m.dification,*** that stop,significantly delay,or reverse the progression of the disease,has been turned out to a difficult goal to achieve.

关键词： diseases treatm.nt therapeutic

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Effects of therm.l boundary conditions on the j.ule heating of electrolyte in a m.crochannel

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j.urnal of Hydrodynam.cs 2016年第5期28卷 850-862页

作者： m. Y. ABDOLLAHZADEH j.m.LABADI j. H. PARK m. m. RASHIDI j. m. CHEN Departm.nt of Ship Engineering Chabahar Maritime University Chabahar Iran Departm.nt of Aerospace and System.Engineering Gyeongsang National University Jinju Korea . Engineering Faculty of Bu-Ali Sina University Hamedan Iran Departm.nt of m.chanical and Nuclear Engineering Kansas State University Manhattan USA

j.ule heating effects on a slit m.crocharm.l filled with electrolytes are com.rehensively investigated with em.hasis on the therm.l boundary conditions. An accurate analytical expression is proposed for the electrical field and the tem.erature distributions due to j.ule heating are num.rically obtained from.the energy balance equation. The results show that a therm.l design based on the average electric potential difference between electrodes can cause severe underestim.tion of j.ule heating. In addition, the param.- tric study of therm.l boundary conditions gives us an insight into the best cooling scenario for m.crofluidic devices. Other significant therm.l characteristics, including Nusselt num.er, therm.phoretic force, and entropy generation, are discussed as well. This study will provide useful inform.tion for the optim.zation of a biom.m. device in relation to the therm.l aspect.

关键词： m.crochannel electrolyte j.ule heating Nusselt num.er therm.phoretic force entropy generation optim.zed therm.ldesign

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Leader-following consensus control for networked m.lti-teleoperator system. with interval tim.-varying com.unication delays

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Chinese Physics B 2013年第7期22卷 96-103页

作者： m. j. Park S. m. Lee j. W. Son O. m. Kwon E. j. Cha School of Electrical Engineering Chungbuk National University School of Electronic Engineering Daegu University Division of IT-Convergence Daegu Gyeongbuk Institute of Science & Technology Departm.nt of Biom.dical Engineering School of MedicineChungbuk National University

We study the leader-following consensus stability and stabilization of networked m.lti-teleoperator system. with interval tim.-varying com.unication delays. With the construction of a suitable Lyapunov–Krasovskii functional and the utilization of the reciprocally convex approach, novel delay-dependent consensus stability and stabilization conditions for the system. are established in term. of linear m.trix inequalities, which can easily be solved by various effective optim.zation algorithm.. One illustrative exam.le is given to illustrate the effectiveness of the proposed m.thods.

关键词： m.lti-teleoperator system. interval tim.-varying delay leader–following consensus problem Lyapunov m.thod

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The unusual life history of a southern Iberian Peninsula population of Torleya m.j.r （Ephem.roptera： Ephem.rellidae）

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Insect Science 2011年第5期18卷 583-589页

作者： m. j. Lopez-Rodriguez j. m. Tierno de Figueroa j. Alba-Tercedor Departam.nto de Biologia Anim.l Facultad de Ciencias Universidad de Granada Granada Spain

The nym.hal biology of a population of Torleya m.j.r （Klapalek） in southem.Iberian Peninsula was studied. An atypical life cycle pattern is described, with eggs hatching in August producing a fast-developing cohort with adults em.rging in autum. and a second slow-developing cohort with adults em.rging in spring of the following year. Nym.hal growth occurred prim.rily in sum.er-autum. （in the first cohort） and in spring （in the second）. The origin of such a life history is discussed. Nym.hs were collector-gatherers, consum.ng m.inly detritus. Although ontogenetic shifts on the use of trophic resources were detected, sim.lar food was utilized during the m.nths when both cohorts cohabited, elim.nating the possibility that the rapid growth of the first cohort could be related to the utilization of different food resources.

关键词： collector-gatherer life cycle m.yfly nym.hal feeding southern Iberian Peninsula

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Effect of Oxide Inclusions on Electrochem.cal Properties of Alum.nium.Sacrificial Anodes

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j.urnal of m.terials Science & Technology 2009年第1期25卷 95-101页

作者： m. Em.m. A. Keyvani m. m.hta j. Cam.bell School of m.tallurgy and m.terials University of Tehran Tehran Iran Departm.nt of m.tallurgy and m.terials University of Birmingham B15 2TT UK

Oxide film. are incorporated into m.lts by an entrainm.nt process, and are expected to be present in m.st m.tals, but particularly cast Al alloys. The oxides are necessarily present as folded-over double film. （bifilm.） that are effectively cracks. Their effect on the electrochem.cal behaviour of cast Al-SZn-0.021n sacrificial anodes was studied in 3 wt pct sodium.chloride solution using the NACE efficiency evaluation. Three m.thods were em.loyed to entrain progressive am.unts of oxide in the alloy, including the addition of Al-Zn-ln m.ching chips to the charge, increasing the pouring height, and agitating the m.lt. The introduction of oxide bifilm. in the cast alloy resulted in the deterioration of the electrochem.cal properties of the sacrificial anodes, such as current capacity and anode efficiency, and introduced increasing variability in these properties. The results suggest that corrosion behaviour is strongly related to the presence of bifilm. suspended in the liquid alloy because bifilm. provide crack paths allowing the corrodant to penetrate deeply into the m.tal m.trix, and sim.ltaneously provide localized galvanic cells because of the precipitation of Fe rich interm.tallic com.ounds on their outer surfaces.

关键词： Alum.nium Sacrificial anode Efficiency Entrainm.nt Bifilm

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m.ltiple System.Decom.osition m.thod for Avoiding Quantum.Decoherence

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Chinese Physics Letters 2008年第2期25卷 371-374页

作者： j. j.knic-Dugic m. Dugic Departm.nt of Physics Faculty of Science Nis Serbia Departm.nt of Physics Faculty of Science Kragujevac Serbia

Decom.osition of a com.osite system.C into different subsystem., A＋B or D＋ε, m.y help in avoiding decoherence. For exam.le, the environm.nt-induced decoherence for an A＋B system.need not destroy entanglem.nt present in the D＋ε system.（A＋B=C=D＋ε）. This new approach opens som. questions also in the foundations of the quantum.com.utation theory that m.ght eventually lead to a new m.del of quantum.com.utation.

关键词： pulsars x-ray spectra relativity and gravitation redshift

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Ribozym.s and the m.chanism. that underlie RNA catalysis

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Frontiers of Chem.cal Science and Engineering 2016年第2期10卷 178-185页

作者： Tim.thy j. Wilson Yij.n Liu David m. j. Lilley Cancer Research UK Nucleic Acid Structure Research Group MSI/WTB Complex The University of Dundee Dundee DD1 5EH UK

Ribozym.s are widespread, and catalyze som. extrem.ly im.ortant reactions in the cell. m.chanistically m.st fall into one of two classes, using either m.tal ions or general acid-base catalysis. The nucleolytic ribozym.s fall into the latter class, m.stly using nucleobases. A sub-set of these use a com.ination of guanine base plus adenine acid to catalyze the cleavage reaction. New ribozym.s are still being discovered at regular intervals and we can speculate on the potential existence of ribozym.s that catalyze chem.stry beyond phosphoryl transfer reactions, perhaps using sm.ll-m.lecule coenzym.s.

关键词： RNA catalysis RNA structure catalytic m.chanism

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