检索结果-南通市图书馆

Frontiers of Materials Science 2015年第2期9卷 156-162页

作者： gilles jacquemod Alexandre FONSECA Emeric de FOUCAULD Yves LEDUC Philippe LORENZINI EpOC URE UNS 006 Universite Nice Sophia Antipolis Sophia Antipolis France CEA-LETI Grenoble France

MOS bulk transistor is reaching its limits： sub-threshold slope （SS）, drain induced barrier lowering （DIBL）, threshold voltage （VT） and VDD scaling slowing down, more power dissipation, less speed gain, less accuracy, variability and reliability issues. Fully depleted devices are mandatory to continue the technology roadmap. FDSOI technology relies on a thin layer of silicon that is over a buried oxide （BOx）. Called ultra thin body and buried oxide （UTBB） transistor, FDSOI transistors correspond to a simple evolution from conventional MOS bulk transistor. The capability to bias the back-gate allows us to implement calibration techniques without adding transistors in critical blocks. We have illustrated this technique on a very low power voltage-controlled oscillator （VCO） based on a ring oscillator （RO） designed in 28 nm FDSOI technology. Despite the fact that such VCO topology exhibits a larger phase noise, this design will address aggressively the size and power consumption reduction. Indeed we are using the efficient back-gate biasing offered by the FDSOI MOS transistor to compensate the mismatches between the different inverters of the ring oscillator to decrease jitter and phase noise. We will present the reasons which led us to use the FDSOI technology to reach the specifications of this PLL. The VCRO exhibits a 0.8 mW power consumption, with a phase noise about -94 dBc/Hz@l MHz.

关键词： nanoelectronics FDSOI UTBB VCO PLL

Towards an enhanced interpretation of δ18O changes during the past 300 kyr over Asia

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2022年第11期9卷 63-64页

作者： gilles Ramstein Laboratoire des Sciences du Climat et de l’Environnement LSCE/IPSL CEA-CNRS-UVSQUniversite Paris-Saclay

For many decades, the impact of orbital forcing on monsoon systems has been intensively studied. Rapidly, attention has been drawn to the Mid-Holocene due to the ’Green Sahara’, which was depicted, using many different proxies, as much more humid than the present-day desert. It also corresponds to enhanced Asian monsoons [1]. Climate models have been used to simulate this period.

关键词：

SEEMINGLY INJECTIVE VON NEUMANN ALGEBRAS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2021年第6期41卷 2055-2085页

作者： gilles PISIER Department of Mathematics Texas A&M UniversityCollege StationTX77843-3368USA

We show that a QWEP von Neumann algebra has the weak* positive approximation property if and only if it is seemingly injective in the following sense: there is a factorization of the identity of Id_(M)= vu : M→uB(H)→vM with u normal, unital, positive and v completely contractive. As a corollary, if M has a separable predual, M is isomorphic(as a Banach space) to B(l2). For instance this applies(rather surprisingly) to the von Neumann algebra of any free group. Nevertheless, since B(H) fails the approximation property(due to Szankowski) there are M ’s(namely B(H)^(**) and certain finite examples defined using ultraproducts) that are not seemingly ***, for M to be seemingly injective it suffices to have the above factorization of I dM through B(H) with u, v positive(and u still normal).

关键词： von Neumann algebra injectivity positive approximation property

Combining data envelopment analysis and Random Forest for selectingoptimal locations of solar PV plants

在线全文

学校读者我要写书评

暂无评论

Energy and AI 2023年第1期11卷 129-137页

作者： gilles Cattani GSEM University of Geneva Geneva1213Switzerland

Solar photovoltaic (PV) energy has emerged as a potential alternative to carbon-based energies to meet theParis agreement commitment. This study investigates the effect of environmental variables on the efficiencyof solar PV panels. Data Envelopment Analysis (DEA) is used to estimate efficiencies of 91 solar PV panelslocated in Australia during the time period 2010–2020. The effects of environmental variables on the estimatedefficiencies are quantified using the truncated regression model. Random forest is then used to predict efficiencyof solar PV panel in every city of Australia. The results allow to determine the most suitable location and regions for solar PV energy production in Australia. This study provides an interesting and easily interpretabletool for policy decision makers.

关键词： Solar energy Location selection Australia Data envelopment analysis

PM_(2.5) source apportionment in a French urban coastal site under steelworks emission influences using constrained non-negative matrix factorization receptor model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2016年第2期28卷 114-128页

作者： Adib Kfoury Frederic Ledoux Cloe Roche gilles Delmaire gilles Roussel Dominique Courcot Unite de Chimie Environnementale et Interactions sur le Vivant (UCEIV) EA4492 Universite du Littoral Cote d'Opale F-59140 Dunkerque France Laboratoire d'Informatique Signal et Image de la Cote d'Opale (LISIC) EA4491 Universite du Littoral Cote d'Opale F-52228 Calais France

The constrained weighted-non-negative matrix factorization（CW-NMF） hybrid receptor model was applied to study the influence of steelmaking activities on PM_（2.5）（particulate matter with equivalent aerodynamic diameter less than 2.5 μm） composition in Dunkerque,Northern France. Semi-diurnal PM_（2.5）samples were collected using a high volume sampler in winter 2010 and spring 2011 and were analyzed for trace metals, water-soluble ions, and total carbon using inductively coupled plasma – atomic emission spectrometry（ICP-AES）,ICP- mass spectrometry（ICP-MS）, ionic chromatography and micro elemental carbon analyzer. The elemental composition shows that NO_3^-, SO_4^（2-）, NH_4~＋and total carbon are the main PM_（2.5）constituents. Trace metals data were interpreted using concentration roses and both influences of integrated steelworks and electric steel plant were evidenced. The distinction between the two sources is made possible by the use Zn/Fe and Zn/Mn diagnostic ratios. Moreover Rb/Cr, Pb/Cr and Cu/Cd combination ratio are proposed to distinguish the ISW-sintering stack from the ISW-fugitive emissions. The a priori knowledge on the influencing source was introduced in the CW-NMF to guide the calculation. Eleven source profiles with various contributions were identified： 8 are characteristics of coastal urban background site profiles and 3 are related to the steelmaking activities. Between them,secondary nitrates, secondary sulfates and combustion profiles give the highest contributions and account for 93% of the PM_（2.5）concentration. The steelwork facilities contribute in about 2%of the total PM_（2.5）concentration and appear to be the main source of Cr, Cu, Fe, Mn, Zn.

关键词： PM_(2.5) Receptor modeling Non-negative matrix factorization Source apportionment Steelworks

Very Regular Solutions for the Landau-Lifschitz Equation with Electric Current

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2018年第5期39卷 889-916页

作者： gilles CARBOU Rida JIZZINI Laboratoire de Mathématiques Appliquées de Pau UMR CNRS 5142 Université de Pau et des Pays de l'Adour Institut de Mathématiques de Bordeaux UMR CNRS 5251 Université de Bordeaux 351 cours de la Libération

The authors consider a model of ferromagnetic material subject to an electric current, and prove the local in time existence of very regular solutions for this model in the scale of H^k spaces. In particular, they des... 详细信息

关键词： Ferromagnetic materials Compatibility conditions Existence result

The Role of a Vanishing Interfacial Layer in Perfect Elasto-Plasticity

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2015年第5期36卷 813-828页

作者： gilles A.FRANCFORT Alessandro GIACOMINI LAGA Université Paris-Nord and Institut Universitaire de France DICATAM Sezione di Matematica Universita degli Studi di Brescia

A two-phase elasto-plastic material is investigated. It is shown that, if the interface is modeled as the limit of a vanishing layer of a third material, then the resulting two-phase material will exhibit a smaller in... 详细信息

关键词： Plasticity Variational Evolutions Interfaces Functions of bounded deformation

A Numerical Analysis of Turbulent Compressible Radial Channel Flow with Particular Reference to Pneumatic Controllers

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2004年第1期13卷 24-29页

作者： gilles Roy Dinh Vo-Ngoc Vadim Bravine Faculty of Engineering Université de MonctonMonctonNBCanadaE1A 3E9Faculty of EngineeringUniversité de MonctonMonctonNBCanadaE1A 3E9Faculty of EngineeringUniversité de MonctonMonctonNBCanadaE1A 3E9

A numerical analysis of turbulent axisymmetric radial compressible channel flow between a nozzle and a flat plate is presented in this paper. In particular, the application of this type of flow situation in pneumatic dimensional control systems is considered. The Spalart-Allmaras one-equation turbulence model is used. The resulting highly coupled PDE system has been solved using the control volume based numerical approach where the power-law scheme was used extensively to compute the diffusive and convective fluxes of momentum. Results show that local Mach numbers can easily achieve and surpass unity for typical industrial configurations. Also, in the case of a standard industrial nozzle geometry, the presence of a toroidal recirculation zone that moves radially outward is clearly identified in most cases. Separated flow areas are of particular concern as it has been shown previously that they can cause nozzle fouling in industrial applications. It has been shown that the size of this region is dependant on feed pressure. Considerable differences between results obtained using the Spalart-Allmaras and standard k- εturbulence models have also been noticed.

关键词： compressible radial flow numerical simulation pneumatic controllers impinging jet with confinement.

CONCEPTUAL INTEGRATION

在线全文

学校读者我要写书评

暂无评论

外国语 2003年第2期26卷 2-7页

作者： gilles Fauconnier The University of California

Cognitive science research in the last twenty-five years has provided considerable evidence that reason is embodied. The neural architectures that evolved to produce perception, sensation, and bodily movement are at t... 详细信息

关键词：概念一体化认知语言学复杂性物质基础独立结构

A Hybrid Local/Nonlocal Continuum Mechanics Modeling and Simulation of Fracture in Brittle Materials

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2019年第11期121卷 399-423页

作者： Yongwei Wang Fei Han gilles Lubineau King Abdullah University of Science and Technology(KAUST) Physical Science and Engineering DivisionCOHMAS LaboratoryThuwal23955-6900Saudi Arabia State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsInternational Research Center for Computational MechanicsDalian University of TechnologyDalian116023China

Classical continuum mechanics which leads to a local continuum model,encounters challenges when the discontinuity appears,while peridynamics that falls into the category of nonlocal continuum mechanics suffers from a high computational cost.A hybrid model coupling classical continuum mechanics with peridynamics can avoid both *** paper describes the hybrid model and its adaptive coupling approach which dynamically updates the coupling domains according to crack propagations for brittle *** this hybrid local/nonlocal continuum model is applied to fracture *** numerical examples like a plate with a hole,Brazilian disk,notched plate and beam,are performed for verification and *** addition,a peridynamic software is introduced,which was recently developed for the simulation of the hybrid local/nonlocal continuum model.

关键词： Peridynamics hybrid model adaptive coupling fracture simulation morphing function numerical discretization