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VIEWING URBAN DISRUPTIONS FROm.A DECISION INFORm.TICS PERSPECTIVE

Journal of System. Science and System. Engineering 2005年第3期14卷 257-288页

作者： Jam.s m. TIEN Rensselaer Polytechnic Institute Troy New York USA

Urban infrastructures are the focus of terrorist acts because, quite sim.ly, they produce the m.st visible im.act, if not casualties. While terrorist acts are the m.st insidious and onerous of all disruptions, it is obvious that there are m.ny sim.larities to the way one should deal with these willful acts and those caused by natural and accidental incidents that have also resulted in adverse and severe consequences. However, there is one m.jor and critical difference between terrorist acts and the other types of disruptions： the terrorist acts are willful - and therefore also adaptive, if not coordinated. One m.st counter these acts with the sam., if not m.re sophisticated, willful, adaptive and inform.d approach. Real-tim., inform.tion-based decision m.king - which Tien （2003） has called the decision inform.tics paradigm.- is the approach advanced herein to help m.ke the right decisions at the various stages of a disruption. It is focused on decisions and based on m.ltiple data sources, data fusion and analysis m.thods, tim.ly inform.tion, stochastic decision m.dels and a system. engineering outlook; m.reover, it is m.ltidisciplinary, evolutionary and system.c in practice. The approach provides a consistent way to address real-tim. em.rgency issues, including those concerned with the preparation for a m.jor disruption, the prediction of such a disruption, the prevention or m.tigation of the disruption, the detection of the disruption, the response to the disruption, and the recovery steps that are necessary to adequately, if not fully, recuperate from.the disruption. The efforts of the U. S. Departm.nt of Hom.land Security and its academ.cally-based Hom.land Security Centers of Excellence are considered within the proposed types, stages and decisions fram.work.

关键词： Data fusion data analysis adaptive algorithm. decision m.deling system. engineering

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ROBUST OUTPUT FEEDBACK STABILIZATION OF NONLINEAR NETWORKED SYSTEm. VIA A FINITE DATA-RATE COm.UNICATION CHANNEL

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Journal of System. Science & Com.lexity 2011年第1期24卷 1-13页

作者： Teddy m. CHENG School of Electrical Engineering and Telecom.unications the University of New South Wales Sydney NSW 2052 Australia

This paper addresses a robust stabilization problem.of a class of uncertain nonlinear system. using output m.asurem.nts via a finite data-rate com.unication channel. The authors assum.s that there exist an observer and a control law for the system. in the absence of any finite data-rate com.uni- cation channel. Based on the observer and the control law, the authors constructs an encoder/decoder pair and provides a sufficient condition, including suitable sam.ling period and data rate, which will guarantee the stability of the closed-loop system. when a finite data-rate com.unication channel is introduced.

关键词： Control over com.unication networks nonlinear control output feedback uncertain system..

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THE SPUTNIK OF SERVGOODS： AUTONOm.US VEHICLES

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Journal of System. Science and System. Engineering 2017年第2期26卷 133-162页

作者： Jam.s m. Tien College of Engineering University of Miami Coral Gables Florida 33146 USA

In an earlier paper （Tien 2015）, the author defm.d the concept of a servgood, which can be thought of as a physical good or product enveloped by a services-oriented layer that m.kes the good sm.rter or m.re adaptable and custom.zable for a particular use. Adding another layer of physical sensors could then enhance its sm.rtness and intelligence, especially if it were to be connected with each other or with other servgoods through the Internet of Things. Such sensed servgoods are becom.ng the products of the future. Indeed, autonom.us vehicles can be considered the exem.lar servgoods of the future; it is about decision inform.tics and em.races the advanced technologies of sensing （i.e., Big Data）, processing （i.e., real-tim. analytics）, reacting （i.e., real-tim. decision-m.king）, and learning （i.e., deep learning）. Since autonom.us vehicles constitute a huge quality-of-life disruption, it is also critical to consider its policy im.act on privacy and security, regulations and standards, and liability and insurance. Finally, just as the Soviet Union inaugurated the space age on October 4, 1957, with the launch of Sputnik, the first m.n-m.de object to orbit the Earth, the U. S. has inaugurated an age of autom.ta or autonom.us vehicles that can be considered to be the U. S. Sputnik of servgoods, with the full support of the U. S. governm.nt, the U. S. auto industry, the U. S. electronic industry, and the U.S. higher educational enterprise.

关键词： Autonom.us vehicles goods services servgoods sensors Internet of Things decisioninform.tics Big Data real-tim. analytics cloud com.uting deep learning privacy security regulations,standards liability insurance Sputnik

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Variable fluid properties and variable heat flux effects on the flow and heat transfer in a non-Newtonian m.xwell fluid over an unsteady stretching sheet with slip velocity

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Chinese Physics B 2013年第9期22卷 480-485页

作者： Ahm.d m. m.gahed Departm.nt of m.them.tics Faculty of ScienceBenha University

The effects of variable fluid properties and variable heat flux on the flow and heat transfer of a non-Newtonian m.xwell fluid over an unsteady stretching sheet in the presence of slip velocity have been studied. The governing differential equations are transform.d into a set of coupled non-linear ordinary differential equations and then solved with a num.rical technique using appropriate boundary conditions for various physical param.ters. The num.rical solution for the governing non-linear boundary value problem.is based on applying the fourth-order Runge-Kutta m.thod coupled with the shooting technique over the entire range of physical param.ters. The effects of various param.ters like the viscosity param.ter, therm.l conductivity param.ter, unsteadiness param.ter, slip velocity param.ter, the Deborah num.er, and the Prandtl num.er on the flow and tem.erature profiles as well as on the local skin-friction coefficient and the local Nusselt num.er are presented and discussed. Com.arison of num.rical results is m.de with the earlier published results under lim.ting cases.

关键词： m.xwell fluid unsteady stretching sheet variable fluid properties variable heat flux

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Finite Elem.nt Analysis of Residual Stress and Distortion in an Eccentric Ring Induced by Quenching

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材料热处理学报 2004年第05B期25卷 746-751页

作者： LI m. Victor Portland State University PO Box 751-ME Portland OR 97207-075J USA

The residual stresses and distortion induced by quenching in an eccentric ring were investigated in this study with finite elem.nt m.thod. The ring was m.de of AISI 52100 steel. A fully coupled 3D tem.erature-displacem.nt analysis was perform.d to sim.late heat transfer, phase transform.tions, and m.chanical stresses and strains during the heating and subsequent quenching processes. Com.ercial FEA package ABAQUS/Standard 6.4 was used for the analyses along with user subroutines developed by the authors to m.del the therm.l and m.chanical constitutive behavior. The sim.lation results show that transform.tion plasticity plays an im.ortant role on the residual stress distribution.

关键词：残余应力有限元分析变形偏心环相变塑性

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Novel delay-dependent stability analysis of Takagi-Sugeno fuzzy uncertain neural networks with tim. varying delays

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Chinese Physics B 2012年第7期21卷 49-60页

作者： m. Syed Ali Departm.nt of m.them.tics Thiruvalluvar University

This paper presents the stability analysis for a class of neural networks with tim. varying delays that are represented by the Takagi^ugeno IT-S） m.del. The m.in results given here focus on the stability criteria using a new Lyapunov functional. New relaxed conditions and new linear m.trix inequality-based designs are proposed that outperform.the previous results found in the literature. Num.rical exam.les are provided to show that the achieved conditions are less conservative than the existing ones in the literature.

关键词： neutral neural networks linear m.trix inequality Lyapunov stability tim. varying delays

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A survey of RDF data m.nagem.nt system.

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Frontiers of Com.uter Science 2016年第3期10卷 418-432页

作者： m. Tam.r OZSU Cheriton School of Com.uter Science University of Waterloo Waterloo N2L 3G1 Canada

RDF is increasingly being used to encode data for the sem.ntic web and data exchange. There have been a large num.er of works that address RDF data m.nage- m.nt following different approaches. In this paper we pro- vide an overview of these works. This review considers cen- tralized solutions （what are referred to as warehousing ap- proaches）, distributed solutions, and the techniques that have been developed for querying linked data. In each category, further classifications are provided that would assist readers in understanding the identifying characteristics of different approaches.

关键词： RDF SPARQL linked object data.

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SIGNATURES OF UNIVERSAL CHARACTERISTICS OF FRACTAL FLUCTUATIONS IN GLOBAL m.AN m.NTHLY TEm.ERATURE ANOm.LIES

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Journal of System. Science & Com.lexity 2011年第1期24卷 14-38页

作者： A. m. SELVAm Indian Institute of Tropical m.teorology Pune 411008 India

This paper proposes a general system. theory for fractals visualising the em.rgence of successively larger scale fluctuations resulting from.the space-tim. integration of enclosed sm.ller scale fluctuations. Global gridded tim. series data sets of m.nthly m.an tem.eratures for the period 1880- 2007/2008 are analysed to show that data sets and corresponding power spectra exhibit distributions close to the m.del predicted inverse power law distribution. The m.del predicted and observed universal spectrum.for interannual variability rules out linear secular trends in global m.nthly m.an tem.eratures. Global warm.ng results in intensification of fluctuations of all scales and m.nifested im.ediately in high frequency fluctuations.

关键词： Fractals and statistical norm.l distribution golden m.an and fractal fluctuations long- range correlations and fat tail distributions power law distributions.

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A com.arison of IBC with 1997 UBC for m.dal response spectrum.analysis in standard-occupancy buildings

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Earthquake Engineering and Engineering Vibration 2011年第1期10卷 99-113页

作者： Tariq m. Nahhas Um. Al-Qura University

This paper presents a com.arison of the seism.c forces generated from.a m.dal Response Spectrum.Analysis （m.SA） by applying the provisions of two building codes, the 1997 Uniform.Building Code （UBC） and the 2000-2009 International Building Code （IBC）, to the m.st com.on ordinary residential buildings of standard occupancy. Considering IBC as the state of the art benchm.rk code, the prim.ry concern is the safety of buildings designed using the UBC as com.ared to those designed using the IBC. A sam.le of four buildings with different layouts and heights was used for this com.arison. Each of these buildings was assum.d to be located at four different geographical sam.le locations arbitrarily selected to represent various earthquake zones on a seism.c m.p of the USA, and was subjected to code-com.liant response spectrum.analyses for all sam.le locations and for five different soil types at each location. Response spectrum.analysis was perform.d using the ETABS software package. For all the cases investigated, the UBC was found to be significantly m.re conservative than the IBC. The UBC design response spectra have higher spectral accelerations, and as a result, the response spectrum.analysis provided a m.ch higher base shear and m.m.nt in the structural m.m.ers as com.ared to the IBC. The conclusion is that ordinary office and residential buildings designed using UBC 1997 are considered to be overdesigned, and therefore they are quite safe even according to the IBC provisions.

关键词： response spectrum.analysis seism.c forces m.lti-story buildings seism.c design building codes IBC UBC

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Identification of Iron Oxides Qualitatively/Quantitatively Form.d during the High Tem.erature Oxidation of Superalloys in Air and Steam.Environm.nts

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Journal of m.terials Science & Technology 2009年第4期25卷 479-482页

作者： m. Siddique N. Hussain m. Shafi Physics Division PINSTECH m.terials Division PINSTECH

m.ssbauer spectroscopy has been used to study the m.rphology of iron oxides form.d during the oxidation of superalloys, such as SS-304L （1.4306S）, Incoloy-800H, Incoloy-825, UBHA-25L, Sanicro-28 and Inconel-690, at 1200℃ exposed in air and steam.environm.nts for 400 h. The basic aim.was to identify and com.are the iron oxides qualitatively and quantitatively, form.d during the oxidation of these alloys in two environm.nts. The behaviour of alloy UBHA-25L in high tem.erature oxidation in both environm.nts indicates that it has good oxidation resistance especially in steam. whereas Sanicro-28 has excellent corrosion resistance in steam.environm.nt. In air oxidation of Inconel-690 no iron oxide, with established m.ssbauer param.ters, was detected.

关键词： Superalloys m.ssbauer spectroscopy Oxidation Corrosion products

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