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Tri-directional shaking table tests of vibration sensitive equipment with static dynamics interchangeable-ball pendulum system

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Earthquake Engineering and Engineering Vibration 2010年第1期9卷 103-112页

作者： c.s. Tsai Yung-chang Lin Wen-shin chen H.c. su D G epartment of civil Engineering Feng Chia University Taichung Chinese Taipei Graduate Institute of civil and Hydraulic Engineering Feng Chia University Taichung Chinese Taipei Department of Water Resourc.s.Engineering and conservation Feng Chia University Taichung Chinese Taipei

Recently, the high-tech industry has become a key industry for economic development in many countries. However, vibration sensitive equipment located in these industrial buildings is vulnerable during earthquakes, which may cause huge economic loss. In this study, an innovative isolator for safeguarding the vibration sensitive equipment, namely, the static dynamics interchangeable^all pendulum system （sDI-BPs） is proposed and investigated to examine its protective capability for the vibration sensitive equipment during earthquakes through a series of tri-directional shaking table tests. The experimental results illustrate that the sDI-BPs isolator can provide significant damping to rolling types of base isolation systems for reducing the bearing displacement and size, and avoid the stress concentration, which can cause damage or scratches on the rolling surface of the isolator, to prolong its life span of service. The sDI-BPs isolator also provides excellent capability in protecting the vibration sensitive equipment and exhibits a stable behavior under long terms of service loadings and earthquakes.

关键词： ball pendulum system critical equipment base isolation vibration sensitive equipment base isolator passive control earthquake engineering structural control

Open charm mesons and charmonia in magnetized strange hadronic matter

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chinese Physics c 2022年第8期46卷 91-113页

作者： Amal Jahan c.s. Amruta Mishra Department of Physics Indian Institute of TechnologyNew Delhi-110016India

We investigate the in-medium masses of open charm mesons(D(D^(0),D^(+)),■(■^(0),D^(-)),D_(s)(D_(s)^(+),D_(s)^(-)))and charmonium states(J/ψ,ψ(3686),ψ(3770),χ_(c0),χ_(c2)) in strongly magnetized isospin asymmetric.s.range hadronic matter using a chiral effective *** the presence of a magnetic field,the number and scalar densities of charged baryons have contributions from Landau energy *** mass modifications of open charm mesons result from their interactions with nucleons,hyperons,and the scalar fields(the non-strange field σ,strange field c and isovector field δ) in the presence of a magnetic *** mass modifications of the charmonium states result from the modification of gluon condensates in a medium simulated by the variation in the dilaton field(χ) in the chiral effective *** effec.s.of finite quark masses are also incorporated in the trace of the energy-momentum tensor in quantum chromodynamics to investigate the mass shifts of charmonium *** in-medium masses of open charm mesons and charmonia are observed to decrease with an increase in baryon *** charged D^(+),D^(-),Z_(s)^(+),and D_(s)^(-)mesons have additional positive mass shifts due to Landau quantization in the presence of a magnetic *** effec.s.of the strangeness fraction are observed to be more dominant for ■ mesons compared with D *** mass shifts of charmonia are observed to be larger in hyperonic media compared with nuclear media when the effect of the finite quark mass term is *** medium mass modifications can have observable consequenc.s.on the production of the open charm mesons and charmonia in high-energy asymmetric heavy-ion collision experiments.

关键词： open charm mesons charmonium states strange hadronic matter magnetic field heavy-ion collision chiral effective model

Proteomics Technologies and challenges

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Genomics, Proteomics & Bioinformatics 2007年第2期5卷 77-85页

作者： William c.s. cho Department of clinical Oncology Queen Elizabeth Hospital

Proteomics is the study of proteins and their interactions in a cell. With the completion of the Human Genome Project, the emphasis is shifting to the protein compliment of the human organism. Because proteome reflec.s.more accurately on the dynamic.s.ate of a cell, tissue, or organism, much is expected from proteomics to yield better disease markers for diagnosis and therapy monitoring. The advent of proteomics technologies for global detection and quantitation of proteins creates new opportunities and challenges for those seeking to gain greater understanding of diseases. High-throughput proteomics technologies combining with advanced bioinformatics are extensively used to identify molecular signatures of diseases based on protein pathways and signaling c.s.ades. Mass spectrometry plays a vital role in proteomics and has become an indispensable tool for molecular and cellular biology. While the potential is great, many challenges and issues remain to be solved, such as mining low abundant proteins and integration of proteomics with genomics and metabolomics data. Nevertheless, proteomics is the foundation for constructing and extracting useful knowledge to biomedical research. In this review, a snapshot of contemporary issues in proteomics technologies is disc.s.ed.

关键词： proteomics mass spectrometry, protein chip

An Inverse Approach for Extracting Elastic-plastic Properties of Thin Films from small scale sharp Indentation

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Journal of Materials science & Technology 2012年第7期28卷 626-635页

作者： Z.s. Ma Y.c. Zhou s.G. Long c.s. Lu Key Laboratory of Low Dimensional Materials ~ Application Technology of Ministry of Education Xiangtan Uni-versity Xiangtan 411105 China Faculty of Materials Optoelectronics and Physics Xiangtan University Xiangtan 411105 China Department of Mechanical Engineering Curtin University of Technology Perth WA 6845 Australia

An inverse method for extracting the elastic-plastic properties of metallic thin films from instrumented sharp indentation has been proposed in terms of dimensional analysis and finite element modeling. A wide range of materials with different elastic modulus, yield strength, and strain-hardening exponent were *** to the Nix-Gao model for the depth dependence of hardness H,the relationship between elastic modulus E and indentation depth h can be expressed as By combiningthese two formulas, we find that there is a relationship between yield stress and indentation depth h：where σyO is the yield strength associated with the strain-hardening exponent n, the true hardness Ho and the true elastic modulus *** constant, whichis only related to n, and hH and hE are characteristic lengths for hardness and elastic modulus. The results obtained from inverse analysis show that the elastic-plastic properties of thin films can be uniquely extracted from the solution of this relationship when the indentation size effect has to be taken into account.

关键词： Indentation Elastic-plastic properties Metal thin films Inverse analysis

cORROsION BEHAVIOR OF A ZIRcONIUM-TITANIUM BAsED PHOsPHONIc AcID cONVERsION cOATING ON AA6061 ALUMINIUM ALLOY

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Acta Metallurgica sinica(English Letters) 2008年第4期21卷 269-274页

作者： s.H. Wang c.s. Liu F.J. shan Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University Shenyang 110004 China Material ＆ chemical Engineering college Liaoning University of Technology Jinzhou 121001 China

The conversion coating was formed by dipping AA6061 in a fluorotitanate/zirconate acid and amino trimethylene phosphonic acid （ATMP） solution at room temperature. The formation proc.s. and the anti-corrosion performance of the conversion coating were investigated using electrochemical test and salt spray test （ssT）, respectively. The electrochemical test shows that the Zr/Ti and ATMP coating improves the corrosion resistance of AA6061 as good as the chromate （VI） coating. But the results of ssT show that the corrosion resistance of Zr/Ti and ATMP coating is not as good as the chromate （VI） coating. The corrosion area is less than 2% after 72 h.

关键词： corrosion resistance Fluorotitanate/zireonate acid Phosphonic acid Aluminium alloy conversion coating

cORROsION REsIsTANcE OF HOT DIP GALVANIZED sTEEL PRETREATED WITH BIs-FUNcTIONAL sILANEs MODIFIED WITH NANOALUMINA

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Acta Metallurgica sinica(English Letters) 2008年第4期21卷 245-252页

作者： F.J. shan c.s. Liu s.H. Wang G.c. Qi Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University Shenyang 110004 China Material ＆ chemical Engineering college Liaoning University of Technology Jinzhou 121001 China

The corrosion behavior of hot dip galvanized steel pretrvated with bis-[triethoxysilylpropyl] tetrasulfide （BTEsPT） modified with alumina particles was studied. The corrosion resistance of the passiving films was evaluated by Tafel polarization curve and electrochemical impedance spectroscopy. The films formed on the galvanized steel substrate were characterized by Fourier transform infrared spectroscopy and energy dispersive X-ray spectrometry. The surface morphology of the treated hot dip galvanized steel samples was observed by Field Emission scanning Electron Microscope. The results show that the pretrvatments on the basis of silane films modified with nanoalumina particles have reduced both anodic and cathodic current densities, and increased total impedance in the measured frequency, consequently, improving corrosion protection for hot dip galvanized steel during immersion in Nacl solutions compared to chromate films and silane films.

关键词： Bis-sulfur silane Nanoalumina corrosion protection characterization Hot dip galvanised steel

AMINO-TRIs-(METHYLENEPHOsPHONIc AcID)LAYERs ADsORPTION ON AA6061 ALUMINUM ALLOY

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Acta Metallurgica sinica(English Letters) 2008年第5期21卷 355-361页

作者： s.H. Wang c.s. Liu F.J. shan G.c. Qi Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University Shenyang 110004 China Material＆ chemical Engineering college Liaoning University of Technology Jinzhou 121001 China

The amino-tri-（methylenephosphonic acid） layers were adsorbed on the surface of AA6061 aluminum alloy for improving the lacquer adhesion and corrosion inhibition as a substitute for chromate coatings. The surface structure and characteristic of the amino-tri-（methylenephosphonic acid） layers on AA6061 aluminum alloy were investigated by means of XPs and ATR-FTIR analysis. The analyzed results showed that the amino-tri-（methylenephosphonic acid） adsorption layers adsorb on the surface of aluminium alloy via acid-base interaction in a bi-dentate conformation. After the amino-tri-（methylenephosphonic acid） layers were coated with epoxy resin, the layers showed good adhesive strength and favorable corrosion resistance in contrast to chromate coatings.

关键词： Amino-tri-(methylenephosphonic acid) layer Organophosphonate Aluminum alloy corrosion resistance

TENsILE TEsTING OF c/c cOMPOsITEs AT HIGH TEMPERATUREs

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Acta Metallurgica sinica(English Letters) 1999年第1期12卷 97-103页

作者： Zhou, s.R. Qiao, s.R. Bai, s.H. Tian, c.s. Northwestern Polytechnical Univ Xi'an China

The tensile properties of three different carbonfiberreinforced carbon composites (c/c), mat c/c, 2D laminate and 4D c/c, were investigated under the combined influence of temperature and loading rate. From the experiments the following could be concluded: loading rate between 10-1-10 mm/min was valid; the fracture stress of the three kinds of c/c composites increased with increasing temperature in the range from room temperature to 1900, and the initial modulus of 2D laminate c/c composites increased with the increase of temperature up to 2000.

关键词： tensile testing c/c composite high temperature mechanical property

EFFEcT OF HEAT TREATMENTs ON THE MIcROsTRUcTURE AND TRANsFORMATION cHARAcTERIsTIcs OF TiNiPd sHAPE MEMORY ALLOY THIN FILMs

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Acta Metallurgica sinica(English Letters) 2005年第6期18卷 707-713页

作者： c.c. Zhang c.s. Yang G.F. Ding s. Q. Qian J.s. Wu National Key Laboratory of Nano/Micro Fabrication Technology Key Laboratory for Thin Film and Microfabrication of Ministry of Education Institute of Micro and Nano Science and Technology Shanghai Jiaotong University Shanghai 200030 China school of Material science and Engineering Shanghai Jiaotong University Shanghai 200030 China

Microstructure and phase transformation behaviors of the film annealed at different temperatures were studied by X-ray diffractometry （XRD）, transmission electron microscopy and differential scanning calorimeter （Dsc）. Also tensile tests were examined. For increasing annealed temperature, multiple phase transformations, transformations via a B19-phase or direct martensite/austenite transformtion are observed. The TiNiPd thin film annealed at 750℃ had relatively uniform martensite/austenite transformtion and shape memory effect. Martensite/austenite transformtion was also found in strain-temperature curves. subsequent annealing at 450℃ had minor effect on transformation temperatures of Ti-Ni-Pd thin films but resulted in more uniform transformation and improved shape memory effect.

关键词： Ti-Ni-Pd thin films microstructure martensitic phase transformation,shape memory effect