Results 21 to 30 of about 500,889 (255)
Theory of optically forbidden d-d transitions in strongly correlated crystals [PDF]
, 2010 A general multiband formulation of linear and non-linear optical response functions for realistic models of correlated crystals is presented. Dipole forbidden d-d optical transitions originate from the vertex functions, which we consider assuming ...
A I Lichtenstein +7 more
core +2 more sources
Insects, 2023 The aim of this study was to analyze morphological types and arrangement of the leg sensilla of Corixidae, Ochteridae and Gelastocoridae, in relation to their various habitats.
Agnieszka Nowińska +2 more
doaj +1 more source
Increasing voltage utilization in split-link, four-wire inverters [PDF]
, 2009 Three-phase four-wire inverters, with either three-leg or four-leg topology, are useful for interfacing distributed generation to networks of unbalanced loads, but neither of the available circuit topologies is ideal.
Feng, C, Green, TC, Liang, J, Weiss, G
core +1 more source
Improved Voltage Unbalance and Harmonics Compensation Control Strategy for an Isolated Microgrid
Energies, 2018 This paper suggests an enhanced control scheme for a four-leg battery energy storage systems (BESS) under unbalanced and nonlinear load conditions operating in the isolated microgrid.
Mohammad Jafar Hadidian Moghaddam +6 more
doaj +1 more source
The transition between hole-pairs and four-hole clusters in four-leg tJ ladders
, 2002 Holes weakly doped into a four-leg \tj ladder bind in pairs. At dopings exceeding a critical doping of $\delta_c\simeq {1/8}$ four hole clusters are observed to form in DMRG calculations.
A. Luther +21 more
core +1 more source
Stair Climbing in a Quadruped Robot
International Journal of Automation and Smart Technology, 2012 This paper reports the algorithm of trajectory planning and the strategy of four-leg coordination for quasi-static stair climbing in a quadruped robot. This development is based on the geometrical interactions between robot legs and the stair, starting ...
Shen-Chiang Chen +3 more
doaj +1 more source
Assessment of Model Predictive Voltage Control for Autonomous Four-Leg Inverter
IEEE Access, 2020 The Finite control set model predictive control (FCS-MPC) is recently introduced to control inverters without the modulation stage. The absence of the modulation stage gives an unpredictable performance of the control system.
Raef Aboelsaud +5 more
doaj +1 more source
, 2010 Starting from an array of four-leg Hubbard ladders weakly doped away from half-filling and weakly coupled by inter-ladder tunneling, we derive an effective low energy model which contains a partially truncated Fermi surface and a well defined Cooperon ...
A. M. Tsvelik +4 more
core +1 more source
A new control scheme for three-phase four-leg inverter
Dianzi Jishu Yingyong, 2018 In the unbalanced or non-linear load conditions, the ordinary three-phase three-leg inverter can not produce three-phase symmetrical voltage, based on the Simulink simulation platform, this paper presents a new closed-loop control design scheme for three-
Sun Lingfang, Li Zhiyuan, Ji Huichao
doaj +1 more source
Opening of the Haldane Gap in Anisotropic Two- and Four-Leg Spin Ladders
, 1999 We study the opening of the Haldane gap in two-leg and four-leg anisotropic spin ladders using bosonization and renormalization group methods, and we determine the phase diagram as a function of the interchain coupling and the relative anisotropy.
A. Luther +37 more
core +1 more source