Results 51 to 60 of about 1,356 (201)

Real‐Time Implementation of Unknown Input Observer‐Based State and Unknown Disturbance Estimation for Series Active Filters

International Journal of Circuit Theory and Applications, Volume 53, Issue 7, Page 3970-3992, July 2025.
For the series active filter (SAF), a combined controller and observer scheme is proposed. Two controllers—state feedback (SFB) and linear quadratic regulator (LQR)—along with state observers, including the Luenberger observer (LO), proportional–integral observer (PIO), and unknown input observer (UIO), have been designed.
Nagulapati Kiran, I. E. S. Naidu
wiley   +1 more source

Self-reported physical fitness in frail older persons:Reliability and validity of the self-assessment of physical fitness (Sapf)

, 2012
In very old and/ or frail older people living in long-term care facilities, physical inactivity negatively affects activities of daily living. The main reason to assess older adults' perceived fitness is to establish the relation with their beliefs about
Weening - Dijksterhuis, Elizabeth, Weening-Dijksterhuis, Betsy, van der Schans, Cees P., de Greef, Mathieu, Krijnen, Wim, van der Schans, Cees, de Greef, Mathieu H. G.   +6 more
core   +1 more source

An Efficient Multi‐Core DSP Power Management Controller

Engineering Reports, Volume 7, Issue 4, April 2025.
This work proposes a power management controller for multi‐core DSP architectures, specifically designed for FT‐xDSP. The primary contributions include a clamp request control unit to ensure system stability during asynchronous resets, and a configurable state transition counter that optimizes clock transitions.
Jian Huang, Huili Wang, Guohui Gong, Lei Wang, Xiaowen Chen   +4 more
wiley   +1 more source

Shunt Active Power Filter with Three Level Inverter using Hysteresis Current Controllers [PDF]

E3S Web of Conferences
This document introduces a Shunt Active Power Filter (SAPF) for three-phase three-wire systems, utilizing a Cascaded H Bridge Multilevel Inverter. The Hysteresis Current Control technique provides numerous benefits, including simplicity, minimal current ...
Raghutu Ramakrishna, Manoj Vasupalli, Kumar Yegireddy Narendra   +2 more
doaj   +1 more source

Impacts of Nonlinear Loads on the Power Quality of Solar Microgrids and Proposed Mitigation Strategies

Energy Science &Engineering, Volume 13, Issue 4, Page 1960-1982, April 2025.
Nonlinear loads in solar microgrids introduce power quality issues such as harmonics, voltage distortions, and reduced system efficiency. These disturbances negatively impact the stability and performance of microgrid components, leading to increased losses and potential equipment damage.
Exaud Tweve, Baraka Kichonge, Thomas Kivevele   +2 more
wiley   +1 more source

Single-Phase Shunt Active Power Filter Based on a 5-Level Converter Topology

Energies, 2018
This paper presents a single-phase Shunt Active Power Filter (SAPF) with a multilevel converter based on an asymmetric full-bridge topology capable of producing five distinct voltage levels.
José Gabriel Oliveira Pinto, Rui Macedo, Vitor Monteiro, Luis Barros, Tiago Sousa, João L. Afonso   +5 more
doaj   +1 more source

PZS‐Net: Incorporating of Frame Sequence and Multi‐Scale Priors for Prostate Zonal Segmentation in Transrectal Ultrasound

Advanced Intelligent Systems, Volume 7, Issue 1, January 2025.
A deep‐learning‐based segmentation method that aimed to segment prostate zones in transrectal ultrasound videos shows results similar to the labels annotated by expert urologists in a prospectively acquired test database. The method is demonstrated to significantly improve prostate zonal segmentation compared with popular segmentation methods.
Jianguo Ju, Qian Zhang, Pengfei Xu, Tiange Liu, Cheng Li, Ziyu Guan   +5 more
wiley   +1 more source

Resonance Detecting and Damping Control with SAPF

, 2015
In order to study the harmonic compensation issues of power distribution system at the state of resonance based on SAPF, firstly the resonance principle of power distribution system was analyzed, and the factors affecting resonance frequency were ...
DAI Ke, ZHANG Yuxiao, CHEN Xinwen, LIU Yuan   +3 more
core   +1 more source

Model Predictive Current Control for Low-Cost Shunt Active Power Filter

CSEE Journal of Power and Energy Systems
Performance of a three-phase shunt active power filter (SAPF) relies on the capability of the controller to track the reference current. Therefore, designing an accurate current controller is crucial to guarantee satisfactory SAPF operation.
Ali A. Abdel-Aziz, Mohamed A. Elgenedy, Barry W. Williams   +2 more
doaj   +1 more source

A Deep Learning‐Based Approach to Characterize Skull Physical Properties: A Phantom Study

Journal of Biophotonics, Volume 18, Issue 1, January 2025.
We extracted various features from ultrasound signals using skull‐mimicking phantoms (including variation in thicknesses and porosity) and analyzed them using machine learning and deep learning models. The evaluation demonstrated that ML‐ and DL‐trained models could predict the physical characteristics of skull phantoms with reasonable accuracy for ...
Deepika Aggrawal, Loïc Saint‐Martin, Rayyan Manwar, Amanda Siegel, Dan Schonfeld, Kamran Avanaki   +5 more
wiley   +1 more source