检索结果-南通市图书馆

Implicit-Explicit Runge-Kutta Schemes for the Boltzmann-Poisson System for Semiconductors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2014年第5期15卷 1291-1319页

作者： Giacomo Dimarco Lorenzo Pareschi Vittorio Rispoli Universite de Toulouse UPSINSAUT1UTMCNRSUMR 5219Institut de Mathematiques de ToulouseF-31062 ToulouseFrance Department of Mathematics and Computer Science University of Ferraravia Machiavelli 3544121 FerraraItaly.

In this paper we develop a class of Implicit-Explicit Runge-Kutta schemes for solving the multi-scale semiconductor Boltzmann *** relevant scale which characterizes this kind of problems is the diffusive *** means that,in the limit of zero mean free path,the system is governed by a drift-diffusion *** aim is to develop a method which accurately works for the different regimes encountered in general semiconductor simulations:the kinetic,the intermediate and the diffusive ***,we want to overcome the restrictive time step conditions of standard time integration techniques when applied to the solution of this kind of phenomena without any deterioration in the *** a result,we obtain high order time and space discretization schemes which do not suffer from the usual parabolic stiffness in the diffusive *** show different numerical results which permit to appreciate the performances of the proposed schemes.

关键词： IMEX-RK methods asymptotic preserving methods semiconductor Boltzmann equation drift-diffusion limit

A Fault Isolation Method Using Interval Arithmetic for Nonlinear Dynamic Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Fault Isolation Method Using Interval Arithmetic for Nonli...

Study on the Parameters Estimation Based on Interval Observer

第24届中国控制与决策会议

作者： Boutaieb Dahhou Boutaieb Dahhou CNRS LAAS Universite′ de Toulouse UPS INSA INP ISAE ut1 UTM LAAS

In this work interval arithmetic is used for the calculation of interval envelopes in the parameter interval based fault isolation method. Thanks the advantage of interval arithmetic of without dependence on the monotonic of model parameters, the application of the parameter interval based fault isolation method can be extended to multi-parameters fault.

关键词： Fault Isolation Parameter Interval Interval Arithmetic Multi-Parameters Fault

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Study on the Parameters Estimation Based on Interval Observe...

Degenerate Anisotropic Elliptic Problems and Magnetized Plasma Simulations

第24届中国控制与决策会议

作者： Boutaieb Dahhou Boutaieb Dahhou CNRS LAAS Universite′ de Toulouse UPS INSA INP ISAE ut1 UTM LAAS

The method using interval observers to estimate parameters have been verified in linear system and simple nonlinear cooperative system （elements of Jacobian matrix on the non-diagonal are non-negative）. We can see the concept about cooperative system in references, but it has some limitations for reality system. This paper tries to use interval observer method for more general nonlinear system which is not a cooperative system. The Jacobian matrix of the observer can meet the condition of cooperative system by properly choosing the gain of the observer, hence the observer becomes a monotonic observer. By using this method, one can determine whether the parameter interval contains the value of the system parameter. The feasibility of this idea is illustrated by the simulation example using a nonlinear dynamic system model.

关键词： Nonlinear dynamic system Parameters interval Interval observer Fault diagnosis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Communications in Computational Physics 2012年第1期11卷 147-178页

作者： Stephane Brull Pierre Degond Fabrice Deluzet Institut de Mathematiques de Bordeaux UMR 5251 Equipe Mathematiques Appliquees de Bordeaux(MAB)Universite Bordeaux 1351cours de la Liberation-33405 TALENCE cedexFrance Universite de Toulouse UPSINSAUT1UTMInstitut de Mathematiques de ToulouseF-31062 ToulouseFrance CNRS Institut de Mathematiques de Toulouse UMR 5219F-31062 ToulouseFrance

This paper is devoted to the numerical approximation of a degenerate anisotropic elliptic *** numerical method is designed for arbitrary spacedependent anisotropy directions and does not require any specially adapted coordinate *** is also designed to be equally accurate in the strongly and the mildly anisotropic *** method is applied to the Euler-Lorentz system,in the drift-fluid *** system provides a model for magnetized plasmas.

关键词： Anisotropic elliptic problem asymptotic-preserving scheme Lorentz force large magnetic field low-Mach number drift-fluid limit

DNA origami mediated electrically connected metal–semiconductor junctions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2020年第5期13卷 1419-1426页

作者： Basu R.Aryal Dulashani R.Ranasinghe Tyler R.Westover Diana G.Calvopia Robert C.Davis John N.Harb Adam T.Woolley Department of Chemistry and Biochemistry Brigham Young UniversityProvoUT 84602USA Department of Chemical Engineering Brigham Young UniversityProvoUT 84602USA Department of Physics and Astronomy Brigham Young UniversityProvoUT 84602USA

DNA-based nanofabrication of inorganic nanostructures has potential application in electronics,catalysis,and *** DNA metallization has generated conductive DNA-assembled nanostructures;however,the use of semiconductors and the development of well-connected nanoscale metal-semiconductor junctions on DNA nanostructures are still at an early ***,we report the first fabrication of multiple electrically connected metal-semiconductor junctions on individual DNA origami by location-specific binding of gold and tellurium *** attachment to DNA origami was via DNA hybridization for Au and by electrostatic interaction for *** gold plating was used to create nanoscale metal-semiconductor interfaces by filling the gaps between Au and Te ***-point electrical characterization indicated that the Au-Te-Au junctions were electrically connected,with current-voltage properties consistent with a Schottky ***-based nanofabrication of metal-semiconductor junctions opens up potential opportunities in nanoelectronics,demonstrating the power of this bottom-up approach.

关键词： current-voltage measurement DNA nanofabrication electroless plating gold nanorods nanoelectronics tellurium nanorods

Numerical Simulations of Rarefied Gases in Curved Channels: Thermal Creep, Circulating Flow, and Pumping Effect

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Computational Physics 2009年第10期6卷 919-954页

作者： Kazuo Aoki Pierre Degond Luc Mieussens Department of Mechanical Engineering and Science Graduate School of EngineeringKyoto UniversityKyoto 606-8501Japan Universite de Toulouse UPSINSAUT1UTMInstitut de Mathematiques de ToulouseF-31062 ToulouseFrance CNRS Institut de Mathematiques de Toulouse UMR 5219F-31062 ToulouseFrance Universite de Bordeaux Institut de Mathematiques de Bordeaux351cours de la Liberation33405 Talence cedexFrance

We present numerical simulations of a new system of micro-pump based on the thermal creep effect described by the kinetic theory of *** device is made of a simple smooth and curved channel with a periodic temperature *** the Boltzmann-BGK model as the governing equation for the gas flow,we develop a numerical method based on a deterministic finite volume scheme,implicit in time,with an implicit treatment of the boundary *** method is comparatively less sensitive to the slow flow velocity than the usual Direct Simulation Monte Carlo method in case of long devices,and turns out to be accurate enough to compute macroscopic quantities like the pressure field in the *** simulations show the ability of the device to produce a one-way flow that has a pumping effect.

关键词： Knudsen compressor thermal creep flow transpiration flow BGK model implicit scheme

Targeting sepsis through inflammation and oxidative metabolism

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Critical Care Medicine 2025年第1期14卷 69-81页

作者： Salena Jacob Sanjana Ann Jacob Joby Thoppil Halmos College of Arts and Sciences Nova Southeastern UniversityFort LauderdaleFL 33328United States Dell School of Medicine University of Texas at Austin Medical SchoolAustinTX 78712United States Emergency Medicine UT Southwestern Medical CenterDallasTX 75390United States

Infection is a public health problem and represents a spectrum of disease that can result in sepsis and septic *** is characterized by a dysregulated immune response to *** shock is the most severe form of sepsis which leads to distributive shock and high mortality *** have been significant advances in sepsis management mainly focusing on early identification and ***,complicating matters is the lack of reliable diagnostic tools and the poor specificity and sensitivity of existing scoring tools i.e.,systemic inflammatory response syndrome criteria,sequential organ failure assessment(SOFA),or quick *** limitations have underscored the modest progress in reducing sepsis-related *** review will focus on novel therapeutics such as oxidative stress targets,cytokine modulation,endothelial cell modulation,etc.,that are being conceptualized for the management of sepsis and septic shock.

关键词： Sepsis Inflammation Oxidative Metabolism Infection Reactive oxygen species

The circular dataimage, a graph for high-resolution circular-spatial data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2010年第1期3卷 47-71页

作者： William J.Morpheta Jürgen Symanzik ATK Launch Systems Brigham CityUTUSA Department of Mathematics and Statistics Utah State UniversityLoganUTUSA

Vectors and periodic phenomena,*** versus time,have direction on a circular scale of 360°.An overview of existing methods for the display of circularspatial and vectorial-spatial data,such as arrow plots,is *** introduce the circular dataimage,a new type of graphic for the display of circular-spatial *** is defined by encoding direction in a spatial display by using colors from a color wheel constructed by connecting three or more two-color gradients with color continuity at the ***,image discontinuity from using a singlecolor gradient,***-red,does not ***-resolution global views of ocean wind direction are used as a running example throughout the *** and disadvantages of circular dataimages compared to arrow plots were obtained from a usability *** dataimages provide for simultaneous recognition of fine structure on a small-scale and large-scale structure on a global scale.

关键词： digital earth earth observation geo-spatial science geoinformatics visualization

Simplified adaptively modulated optical OFDM modems using subcarrier modulation with added input/output reconfigurability

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2012年第2期5卷 187-194页

作者： Xing ZHENG Jinlong WEI Roger Philip GIDDINGS Jianming TANG School of Electronic Engineering Bangor University Bangor LL57 1UT UK

Three novel designs of adaptively modulated optical orthogonal frequency division multiplexing modems using subcarrier modulation （AMOOFDM-SCM） are proposed, for the first time, each of which requires a single inverse fast Fourier transform/fast Fourier transform （IFFT/FFT） operation. These designs not only significantly simplify the AMOOFDM-SCM modem configurations, but also offer extra unique network features such as input/ output reconfigurability. Investigations show that these three modems are capable of supporting more than 60 Gb/s AMOOFDM-SCM signal transmission over 20, 40 and 60 km single mode fibre （SMF）-based intensity modulation and direct detection （IMDD） transmission links without optical amplification and chromatic dispersion compensation.

关键词： orthogonal frequency division multiplexing(OFDM) subcarrier modulation (SCM) single mode fibre(SMF)