Results 1 to 10 of about 53,281 (221)

The Very-Soft X-Ray Emission of X-Ray Faint Early-Type Galaxies

, 1993
A recent re-analysis of Einstein data, and new ROSAT observations, have revealed the presence of at least two components in the X-ray spectra of X-ray faint early-type galaxies: a relatively hard component (kT>1.5 keV), and a very soft component (kT\sim ...
Fabbiano, G., Pellegrini, S.
core   +1 more source

Application of spatially varying storage capacity model for runoff parameterization in semi-arid catchment

Water Science and Engineering, 2009
This paper introduces the method of designation of water storage capacity for each grid cell within a catchment, which considers topography, vegetation and soil synthetically.
Li-liang Ren, Gui-zuo Wang, Fang Lu, Tian-fang Fang   +3 more
doaj   +1 more source

Optimal Control of VSC for STATCOM Applications [PDF]

IFAC Proceedings Volumes, 2012
Abstract In this work, a voltage source converter (VSC) is configured to perform STATCOM tasks and generate reactive power. An optimal H ∞ controller has been successfully implemented including an anti-windup compensator. Data from an experimental test bench is provided and compared with simulation results showing good accuracy level.
Bianchi, Fernando Daniel, Trilla, Lluis, Gomis Bellmunt, Oriol   +2 more
openaire   +2 more sources

The transition from the adiabatic to the sudden limit in core level photoemission: A model study of a localized system

, 1999
We consider core electron photoemission in a localized system, where there is a charge transfer excitation. The system is modelled by three electron levels, one core level and two outer levels. The model has a Coulomb interaction between these levels and
A. Fujimori, A. Fujimori, A. Kotani, A.C. Simonsen, A.M. Bradshaw, B. Wallbank, C. Caroli, C.N. Berglund, D.A. Shirley, D.K.G. de Boer, F. Wuilleumier, G. van der Laan, G.D. Mahan, J. D. Lee, J. Fuggle, J.C. Fuggle, J.C. Slater, J.E. Inglesfield, J.E. Inglesfield, J.J. Chang, J.J. Chang, J.J. Yeh, K. Schönhammer, K. Schönhammer, L. Hedin, L. Hedin, M.A. van Veenendaal, O. Gunnarsson, O. Gunnarsson, O. Gunnarsson, O. Gunnarsson, O. Gunnarsson, O. Gunnarsson, S. Larsson, S. Larsson, W. Bardyszewski, W.L. Schaich   +36 more
core   +1 more source

ESTRATÉGIA DE GESTÃO DE ESTOQUE PARA OTIMIZAÇÃO DA DISTRIBUIÇÃO DE CONCENTRADO DE HEMÁCIAS E REDUÇÃO DE DESCARTES NAS AGÊNCIAS TRANSFUSIONAIS DO HEMONÚCLEO DE APUCARANA-PR

Hematology, Transfusion and Cell Therapy
Objetivos: Os objetivos deste trabalho foram estabelecer um estoque de segurança de concentrado de hemácias, ajustado com base no histórico de demanda para três agências transfusionais atendidas pelo Hemonúcleo de Apucarana: Honpar, Hospital da ...
CR Rosina, VSC Bertelli, JF Bilobran
doaj   +1 more source

Système de conversion simplifié pour éolienne équipée de génératrice synchrone à aimants permanents

Revue des Énergies Renouvelables, 2015
Dans le cadre de la conversion à vitesse variable d’énergie éolienne (VS-WECS: Variable Speed, Wind Energy Conversion System), cet article propose une électronique de puissance simplifiée pour injecter l’énergie produite dans le réseau, spécialement ...
M.J. Lalou
doaj  

Variational and perturbative formulations of QM/MM free energy with mean-field embedding and its analytical gradients

, 2008
Conventional quantum chemical solvation theories are based on the mean-field embedding approximation. That is, the electronic wavefunction is calculated in the presence of the mean field of the environment.
Yamamoto, Takeshi
core   +1 more source

Multiuser Communication through Power Talk in DC MicroGrids

, 2015
Power talk is a novel concept for communication among control units in MicroGrids (MGs), carried out without a dedicated modem, but by using power electronics that interface the common bus.
Angjelichinoski, Marko, Blaabjerg, Frede, Liu, Hongpeng, Loh, Poh Chiang, Popovski, Petar, Stefanovic, Cedomir   +5 more
core   +1 more source

Key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems

CSEE Journal of Power and Energy Systems, 2019
The key technologies of ultra-high voltage hybrid LCC-VSC MTDC systems are investigated, focusing on the design of system configurations, converter topologies and the control and protection system.
Hong Rao, Yuebin Zhou, Shukai Xu, Xipeng Cai, Wanyu Cao, Yiliang Xu, Chenglin Ren   +6 more
doaj   +1 more source

Transient magnetotransport through a quantum wire

, 2007
We consider an ideal parabolic quantum wire in a perpendicular magnetic field. A simple Gaussian shaped scattering potential well or hill is flashed softly on and off with its maximum at $t=0$, mimicking a temporary broadening or narrowing of the wire ...
Chi-Shung Tang, Gunnar Thorgilsson, R. H. Landau, Valeriu Moldoveanu, Vidar Gudmundsson   +4 more
core   +1 more source