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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

Transmission Electron Microscopy study of the Infrared Brazed High-strength Titanium Alloy

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Journal of Materials science & Technology 2010年第4期26卷 311-316页

作者： Z.Y. Wu R.K. shiue c.s. chang Department of Materials science and Engineering National Taiwan University Taipei 106 Taiwan China Engineered Materials solutions 39 Perry Avenue MS 4-1 Attleboro MA 02703-2410 USA

The transmission electron microscopy was employed to investigate the microstructure of infrared brazed highstrength Ti alloy using the Ti-15cu-15Ni filler metal. coarse primary Ti2Ni and transformed β-Ti are observed in the 300 s brazed specimen. Blocky Ti2Ni and eutectoid Ti2cu intermetallics are disappeared from the joint with increasing the brazing time to 1800 s. Both acicular α-Ti and retained β-Ti dominate the entire brazed joint.

关键词： Infrared Brazing Ti Ti-cu-Ni filler Microstructure

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

Roles of soil-structure interaction and damping in base-isolated structures built on numerous soil layers overlying a half-space

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Earthquake Engineering and Engineering Vibration 2016年第2期15卷 387-400页

作者： c.s.tsai c.I.Hsueh H.c.s. Department of civil Engineering Feng Chia University Graduate Institute of civil & Hydraulic Engineering Feng Chia University Department of Water Resourc.s.Engineering and conservation Feng Chia University

This study examines the roles of soil-structure interaction （ssI）, higher modes, and damping in a base-isolated structure built on multiple layers of soil overlying a half space. closed-form solutions for the entire system, including a superstructure, seismic isolator, and numerous soil layers overlying a half-space, were obtained. The formulations obtained in this study simply in terms of well-known frequencies and mechanical impedance ratios can explicitly interpret the dynamic behavior of a base-isolated structure interacting with multiple soil layers overlying a half-space. The key factors influencing the performance of the isolation system are the damping ratio of the isolator and the ratio of the natural frequency of the fixed-base structure to that of the isolated structure by assuming that the superstructure moves as a rigid body. This study reveals that higher damping in the base isolator is unfavorable to higher mode responses that usually dominate the responses of the superstructure and that the damping mechanism plays an important role in transmitting energy in addition to absorbing energy. It is also concluded that it is possible to design a soft soil layer as an isolation system for isolating vibration energy.

关键词： base isolation seismic isolation soil-structure interaction closed- form solution higher-mode effects soilstratum passive control damping effects

Equivalent series system to model a multiple friction pendulum system with numerous sliding interfac.s.for seismic analyses

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Earthquake Engineering and Engineering Vibration 2014年第1期13卷 85-99页

作者： c.s.tsai H.c.s. T.c.chiang Department of civil Engineering Feng Chia University Department of Water Resourc.s.Engineering and conservation Feng Chia University Earthquake Proof systems Inc.

current structural analysis software programs offer few if any applicable device-specifi c hysteresis rules or nonlinear elements to simulate the prec.s. mechanical behavior of a multiple friction pendulum system(MFPs) with numerous sliding *** on the concept of subsystems,an equivalent series system that adopts existing nonlinear elements with parameters systematically calculated and mathematically proven through rigorous derivations is *** aim is to simulate the characteristics of sliding motions for an MFPs isolation system with numerous concave sliding interfac.s.without prior knowledge of detailed information on the mobilized forc.s.at various sliding *** MFPs with numerous concave sliding interfac.s.and one articulated or rigid slider located between these interfac.s.is divided into two subsystems: the fi rst represents the concave sliding interfac.s.above the slider,and the second represents those below the *** equivalent series system for the entire system is then obtained by connecting those for each subsystem in *** equivalent series system is validated by comparing numerical results for an MFPs with four sliding interfac.s.obtained from the proposed method with those from a previous study by Fenz and ***,these numerical results demonstrate that an MFPs isolator with numerous concave sliding interfac.s.which may have any number of sliding interfac.s.is a good isolation device to protect structures from earthquake damage through appropriate designs with controllable mechanisms.

关键词： seismic isolation base isolation earthquake engineering multiple friction pendulum system structural control mathematical modeling equivalent series system

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