Results 11 to 20 of about 12,242,418 (262)

Digital Current-Control Schemes [PDF]

open access: yes, 2009
The paper is about comparing the performance of digital signal processor-based current controllers for three-phase active power filters. The wide use of nonlinear loads, such as front-end rectifiers connected to the power distribution systems for dc ...
Limongi, Leonardo   +3 more
core   +1 more source

Two Degree of Freedom Resonant Structure for Robust Current Control and Active Power Filtering [PDF]

open access: yes, 2005
This paper introduces a novel two degree of freedom resonant control structure for current control in a stationary reference frame in one- or three-phase power electronics systems. The main focus is put on the design of the controller for robust tracking
N. Bajcinca   +3 more
core   +1 more source

Design and implementation of a modified fourier analysis harmonic current computation technique for power active filters using DSPs [PDF]

open access: yes, 2001
The design and implementation of a harmonic current computation technique based on a modified Fourier analysis, suitable for active power filters incorporating DSPs is presented.
El-Habrouk, M   +3 more
core   +1 more source

Seismology of active regions: Current status and perspectives

open access: yesFrontiers in Astronomy and Space Sciences, 2023
The goal of helioseismology is to provide accurate information about the Sun’s interior from the observations of the wave field at its surface. In the last three decades, both global and local helioseismology studies have made significant advances and ...
Sushanta Tripathy
doaj   +1 more source

Programmable Current-Mode Universal Active Filters Employing Current Conveyors

open access: yesActive and Passive Electronic Components, 1998
Novel current-mode active filter circuits using current-conveyors are presented. The proposed circuits can realize all standard second-order filter functions.
Muhammad Taher Abuelma'atti
doaj   +1 more source

Frequency-domain Analysis Of Resonant Current Controllers For Active Power Filters

open access: yesEletrônica de Potência, 2010
This paper performs a frequency-domain analysis of three different resonant current controllers for active power filters. Respect to previous papers, the novelty consists of a stability analysis of the closed loop system using the Nyquist criterion.
Leonardo Rodrigues Limongi   +3 more
doaj   +1 more source

Exploring order in active turbulence: Geometric rule and pairing order transition in confined bacterial vortices

open access: yesBiophysics and Physicobiology, 2022
Ordered collective motion emerges in a group of autonomously motile elements (known as active matter) as their density increases. Microswimmers, such as swimming bacteria, have been extensively studied in physics and biology.
Kazusa Beppu, Yusuke T. Maeda
doaj   +1 more source

Application of a Combined Active Control and Fault Detection Scheme to an Active Composite Flexible Structure. [PDF]

open access: yes, 2006
In this paper, the problem of increasing reliability of active control procedure is considered. Indeed, a design method of rejection perturbation in presence of potentially faults, on a flexible structure with integrated piezo-ceramics, is presented. The
VERGÉ, Michel   +3 more
core   +1 more source

Versatile Active Biquad Based on Dual-Output Second-Generation Current Conveyors

open access: yesActive and Passive Electronic Components, 1998
A universal active biquad based on the dual-output second-generation current-conveyor (CCII±) is presented. The circuit uses only six CCII± and can, simultaneously, support three mixed-mode transfer functions and five current-mode transfer functions ...
M. T. Abuelma'atti, H. A. Alzaher
doaj   +1 more source

Current status of active learning for drug discovery

open access: yesArtificial Intelligence in the Life Sciences, 2021
Active learning has been widely used in drug discovery and design in recent years. In this viewpoint, we will briefly summarize applications of AL for drug discovery and propose two potential limitations of research in this field.
Jie Yu, Xutong Li, Mingyue Zheng
doaj   +1 more source

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