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Linear matrix inequality approach for synchronization control of fuzzy cellular neural networks with mixed time delays

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Chinese physics B 2012年第4期21卷 586-596页

作者： p.Balasubramaniam m.Kalpana R.Rakkiyappan Department of mathematics Gandhigram Rural Institute-Deemed UniversityGandhigram-624302TamilnaduIndia Department of mathematics Bharathiar UniversityCoimbatore-641046TamilnaduIndia

Fuzzy cellular neural networks （FCNNs） are special kinds of cellular neural networks （CNNs）. Each cell in an FCNN contains fuzzy operating abilities. The entire network is governed by cellular computing laws. The design of FCNNs is based on fuzzy local rules. In this paper, a linear matrix inequality （LmI） approach for synchronization control of FCNNs with mixed delays is investigated. mixed delays include discrete time-varying delays and unbounded distributed delays. A dynamic control scheme is proposed to achieve the synchronization between a drive network and a response network. By constructing the Lyapunov-Krasovskii functional which contains a triple-integral term and the free-weighting matrices method an improved delay-dependent stability criterion is derived in terms of LmIs. The controller can be easily obtained by solving the derived LmIs. A numerical example and its simulations are presented to illustrate the effectiveness of the proposed method.

关键词： asymptotic stability chaos fuzzy cellular neural networks linear matrix inequalities synchronization

A geospatial investigation of interlinkage between basement fault architecture and coastal aquifer hydrogeochemistry

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Geoscience Frontiers 2020年第4期11卷 1431-1440页

作者： p.p.Das p.p.mohapatra S.Goswami m.mishra J.K.pattanaik ACOAST Amity University HarayanaGurugramIndia Department of Geology North Odisha UniversityOdishaIndia Department of Earth Sciences Sambalpur UniversitySamabalpurOdishaIndia Khallikote University BerhampurOdishaIndia Centre for Geography and Geology Central University of PunjabBhatindaIndia

The mahanadi delta,deposited on a series of horst and graben basement structures,is considered an extension of the East Lambert Rift of *** study is based on the hydrogeochemical assessment of this deltaic aquifer system and geospatial analysis thereof,to appreciate the basement structure influence on groundwater *** ion chemistry of subsurface waters portrays a distinct saline contamination across the terrain and varied regimes of water types,specifically with respect to southern and northern parts of this aquifer *** of the study indicate a general near surface saline horizon and significant fragmentation of the hydrostatic ***,in turn,implies noteworthy influence of formational water to salinity regimes and basin structural changes for the escape of these waters to surroundings.A plot of recent low intensity earthquakes displays proximity of epicenters to the faults as well as striking similarity to the trend of terrestrial faults indicating multiple reactivations of the *** further corroborate the above findings,spatial pattern analysis of individual hydrochemical variables is carried out which reveals specific clusters of sources(groundwater mixing)and sinks(groundwater dispersion) in proximity to basement fault *** the faults can be disregarded as conduits or barriers owing to their great depth,the overlying sedimentary mass,particularly,the horizons with significant clayey content have been distorted due to post rift subsidence and fault reactivations.A proximity analysis of ionic clusters points towards a greater influence of longitudinal faults to that of the transverse ones on groundwater mixing or dispersion.

关键词： Hydrogeochemistry mahanadi Geospatial Salinity Cluster analysis

LES of film cooling for different jet fluids

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航空动力学报 2007年第4期22卷 521-530页

作者： p. Renze W. Schroeder m. meinke Aerodynamisches Institut RWTH Aachen 52062 Aachen Germany

The present paper investigates the impact of the velocity and density ratio on the turbulent mixing process in gas turbine blade film cooling.A cooling fluid is injected from an inclined pipe at α=30° into a turbulent boundary layer profile at a freestream Reynolds number of Re∞=*** jet-in-a-crossflow(JICF) problem is investigated using large-eddy simulations(LES).The governing equations comprise the Navier-Stokes equations plus additional transport equations for several species to simulate a non-reacting gas mixture.A variation of the density ratio is simulated by the heat-mass transfer analogy,i.e.,gases of different density are effused into an an air crossflow at a constant *** efficient large-eddy simulation method for low subsonic flows based on an implicit dual time-stepping scheme combined with low mach number preconditioning is *** numerical results and experimental velocity data measured using two-component particle-image velocimetry (pIV) are in excellent *** results show the dynamics of the flow field in the vicinity of the jet hole,i.e.,the recirculation region and the inclination of the shear layers,to be mainly determined by the velocity ***,evaluating the cooling efficiency downstream of the jet hole the mass flux ratio proves to be the dominant similarity parameter,i.e.,the density ratio between the fluids and the velocity ratio have to be considered

关键词：航空推进系统仿真横向流动式喷气密度比速率冷却效率薄雾冷却

Biophysical interactions between silver nanoparticle-albumin interface and curcumin

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Journal of pharmaceutical Analysis 2020年第2期10卷 164-177页

作者： Vinod D.Jaiswal p.m.Dongre Department of Biophysics University of MumbaiVidyanagariSantacruzMumbai400098India

Active targeted drug delivery methods facilitate effective uptake of functionalized nanoparticles through receptor-mediated *** recent years,albumin-nanoparticle interaction has been critically examined so that this functionalized nanoparticle can be efficiently loaded with *** present investigation aims at understanding the adsorption of Bovine Serum Albumin(BSA)on Silver Nano-particle(SNp)surface,preparation of soft conjugates(SC)and hard conjugates(HC)of BSA-functionalized SNp(SNp-BSA),and their interaction with curcumin(CUR).HC contains tightly bound BSA whereas SC involves tightly and loosely bound *** in the hydrodynamic radii of conjugates was observed upon SNp incubation with increased concentration of *** different SNp-BSA conjugate ratios were selected to study their interaction with *** spectroscopy showed a strong association between CUR and SNp:BSA ***,binding varied with a change in the conjugate *** Dichroism(CD)/Fourier Transform Infrared(FTIR)spectroscopy revealed the alterations in the secondary structure of BSA upon CUR binding to the *** potential data indicated stable conjugate *** in SNp:BSA conjugate was found to have a higher half-life as compared to the *** believe that this is the first biophysical characterization report of conjugates that can be effectively extrapolated for targeted drug delivery.

关键词： CUR Bovine serum albumin Silver nanoparticles Soft conjugates Hard conjugates Spectroscopy

A Criterion for the Change from Fast to Slow Regime of Cementite Dissolution in Fe-C-mn Steels

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Journal of materials Science & Technology 2012年第8期28卷 728-736页

作者： m.Gouné p.maugis J.Drillet Arcelor mittal Research maizières Voie RomaineBP 30320Maizières-lès-Metz 57283France ICmCB-CNRS 87 avenue du Docteur SchweitzerPessac 33609France Im2Np-UmR CNRS 6242&Aix-marseille University Avenue Escadrille Normandie Niemen-Case 142-13397 Marseille Cedex 20France

The present study clarifies the role of mn in cementite on the driving force of cementite dissolution and the growth of austenite. From an experimental study, the effects of manganese composition and temperature on the cementite dissolution were shown. From a theoretical analysis based on thermodynamic and kinetics considerations, a criterion for the change from fast to slow regime of cementite dissolution was proposed. This criterion is in good agreement with the experimental results. It can be easily calculated and can define the composition and temperature ranges where the cernentite dissolution is slow or fast.

关键词： phase transformation Thermodynamics Kinetics Cementite dissolution Steel

A cavitation aggressiveness index within the Reynolds averaged Navier Stokes methodology for cavitating flows

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Journal of Hydrodynamics 2015年第4期27卷 579-586页

作者： KOUKOUVINIS p. BERGELES G. GAVAISES m. Department of Engineering and mathematical Science City University London

The paper proposes a methodology within the Reynolds averaged Navier Stokes（RANS） solvers for cavitating flows capable of predicting the flow regions of bubble collapse and the potential aggressiveness to material damage. An aggressiveness index is introduced, called cavitation aggressiveness index（CAI） based on the total derivative of pressure which identifies surface areas exposed to bubble collapses, the index is tested in two known cases documented in the open literature and seems to identify regions of potential cavitation damage.

关键词： cavitation aggressiveness index(CAI) cavitation erosion multiphase cavitating flows

Strategies to enhance monoclonal antibody uptake and distribution in solid tumors

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Cancer Biology & medicine 2021年第3期18卷 649-664页

作者： Brandon m.Bordeau Joseph p.Balthasar Department of pharmaceutical Science University at BuffaloBuffaloNY 14214USA

Despite the significant resources dedicated to the development of monoclonal antibody(m Ab)therapies for solid tumors,the clinical success,thus far,has been *** efficacy of m Ab in solid tumors likely relates to unique aspects of tumor *** tumors have an aberrant vasculature and a dense extracellular matrix that slow both the convective and diffusive transport of m Abs into and within *** m Abs that are directed against cellular antigens,high antigen expression and rapid antigen turnover can result in perivascular cells binding to and eliminating a significant amount of extravasated m Ab,limiting m Ab distribution to portions of the tumor that are distant from functional *** preclinical investigations have reported strategies to improve m Ab uptake and distribution;however,to our knowledge,none have translated into the ***,we provide an overview of several barriers in solid tumors that limit m Ab uptake and distribution and discuss approaches that have been utilized to overcome these barriers in preclinical studies.

关键词： Solid tumors antibody uptake and distribution monoclonal antibody antibody-drug conjugate

Experimental Investigation of Flow Instabilities in a Laminar Separation Bubble

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Journal of Thermal Science 2014年第3期23卷 203-214页

作者： Simoni D. Ubaldi m. Zunino p. DImE-Università di GenovaVia montallegro 1 I-16145 Genova Italy DImE-Università di Genova Via Montallegro 1 I-16145 Genova Italy

The present paper reports the results of a detailed experimental study aimed at investigating the dynamics of a laminar separation bubble, from the origin of separation up to the breakdown to turbulence of the large scale co- herent structures generated as a consequence of the Kelvin-Helmholtz instability process. measurements have been performed along a fiat plate installed within a double contoured test section, designed to produce an adverse pressure gradient typical of Ultra-High-Lift turbine blade profiles, which induces the formation of a laminar separation bubble at low Reynolds number condition. measurements have been carried out by means of comple- mentary techniques： hot-wire （HW） anemometry, Laser Doppler Velocirnetry （LDV） and particle Image Veloci- metry （pIV）. The high accuracy 2-dimensional LDV results allow investigating reverse flow magnitude and both Reynolds normal and shear stress distributions along the separated flow region, while the high frequency response of the HW anemometer allows analyzing the amplification process of flow oscillations induced by instability mechanisms. pIV results complement the flow field analysis providing information on the generation and evolu- tion of the large scale coherent structures shed as a consequence of the separated shear layer roll-up, through in- stantaneous velocity vector maps. The simultaneous analysis of the data obtained by means of the different meas- uring techniques allows an in depth view of the instability mechanisms involved in the transition/reattachrnent processes of the separated shear layer.

关键词： Ultra-High-Lift turbine profiles separated flow transition mode streaks Kelvin-Helmholtz instabil- ity linear stability theory

Seismic fragility of structures isolated by single concave sliding devices for different soil conditions

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Earthquake Engineering and Engineering Vibration 2018年第4期17卷 869-891页

作者： p.Castaldo G.Amendola m.Ripani Department of Structural Geotechnical and Building Engineering (DISEG) Politecnico di Torino Turin Italy Department of Civil Engineering University of Salerno Via Giovanni Paolo H (SA) ltaly Universidad de Buenos Aires. Consejo Nacional de lnvestigaciones Cientificas y Tecnicas ( CONICET). Instituto de Tecnologias y Cieneias de la Ingenieria "Hilario Fernandez Long" (INTECIN). Faeultad de Ingenieria Buenos Aires Argentina

This study deals with the seismic fragility of elastic structural systems equipped with single concave sliding（friction pendulum system（FpS）） isolators considering different soil conditions. The behavior of these systems is analyzed by employing a two-degree-of-freedom model, whereas the FpS response is described by means of a velocity-dependent model. The uncertainty in the seismic inputs is taken into account by considering artificial seismic excitations modelled as timemodulated filtered Gaussian white noise random processes of different intensity within the power spectral density method. In particular, the filter parameters, which control the frequency content of the random excitations, are calibrated to describe stiff, medium and soft soil conditions. The sliding friction coefficient at large velocity is also considered as a random variable modelled through a uniform probability density function. Incremental dynamic analyses are developed in order to evaluate the probabilities of exceeding different limit states related to both the reinforced concrete（RC） superstructure and isolation level, defining the seismic fragility curves within an extensive parametric study carried out for different structural system properties and soil conditions. The abovementioned seismic fragility curves are useful to evaluate the seismic reliability of base-isolated elastic systems equipped with FpS and located in any site for any soil condition.

关键词： friction pendulum devices seismic isolation soil condition frequency content seismic fragility