Results 31 to 40 of about 1,050 (208)

Resonance Detecting and Damping Control with SAPF [PDF]

, 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

A Deep Learning-Based Approach to Characterize Skull Physical Properties: A Phantom Study. [PDF]

J Biophotonics
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 ...
Aggrawal D, Saint-Martin L, Manwar R, Siegel A, Schonfeld D, Avanaki K.   +5 more
europepmc   +2 more sources

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

, 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, E., van der Schans, C.P., Weening - Dijksterhuis, Elizabeth, Weening-Dijksterhuis, Betsy, Krijnen, W., van der Schans, Cees P., de Greef, M.H.G., de Greef, Mathieu, Krijnen, Wim, van der Schans, Cees, de Greef, Mathieu H. G.   +10 more
core   +1 more source

Modified SOGI based shunt active power filter to tackle various grid voltage abnormalities

Engineering Science and Technology, an International Journal, 2017
Shunt Active Power Filters (SAPF) have been effectively used to compensate the harmonics generated by the non-linear loads. The SAPF’s performance depends on the accurate generation of reference current, which is dependent greatly on the template of ...
Kalpeshkumar Patil, Hiren H. Patel
doaj   +1 more source

A Sliding Mode Control Strategy with Repetitive Sliding Surface for Shunt Active Power Filter with an LCLCL Filter

Energies, 2020
This paper proposes a novel sliding mode control (SMC) scheme with a repetitive sliding surface for shunt active power filters (SAPF) to enhance the system robustness and eliminate harmonic current tracking errors. Traditional control schemes, such as PI
Yunguang Gao, Xiaofan Li, Wenjie Zhang, Dianchao Hou, Lijun Zheng   +4 more
doaj   +1 more source

Recurrent Wavelet Fuzzy Neural Network-Based Reference Compensation Current Control Strategy for Shunt Active Power Filter

Energies, 2022
The usage of a shunt active power filter (SAPF) is one of the helpful means to mitigate the reactive power and harmonic current of a power grid. The compensation performance of the SAPF is related to the accuracy of the reference voltage extraction from ...
Cheng-I Chen, Yeong-Chin Chen, Chung-Hsien Chen   +2 more
doaj   +1 more source

A Wavelet-Based Unified Power Quality Conditioner to Eliminate Wind Turbine Non-Ideality Consequences on Grid-Connected Photovoltaic Systems

Energies, 2016
The integration of renewable power sources with power grids presents many challenges, such as synchronization with the grid, power quality problems and so on.
Bijan Rahmani, Weixing Li, Guihua Liu
doaj   +1 more source

OPTIMAL TUNING OF PI-CONTROLLER OF SHUNT ACTIVE POWER FILTER FOR HARMONICS MITIGATION USING ENHANCED JUMPING SPIDER ALGORITHM [PDF]

Carpathian Journal of Electrical Engineering, 2022
The increasing use of power electronic devices has resulted in harmonics that may cause in power systems overheating of equipment, poor power factor and voltage distortion.
Betrand N. ATANGA, Francis B. EFFAH, Daniel KWEGYIR, Philip Y. OKYERE   +3 more
doaj  

Inactivation of the sapA to sapF locus of Erwinia chrysanthemi reveals common features in plant and animal bacterial pathogens [PDF]

, 1998
We investigated the role in pathogenesis of bacterial resistance to plant antimicrobial peptides. The sapA to sapF (for sensitive to antimicrobial peptides) operon from the pathogenic bacterium Erwinia chrysanthemi has been characterized.
Lopez Solanilla, Emilia, García Olmedo, Francisco, Rodriguez Palenzuela, Pablo   +2 more
core   +1 more source

Modeling and Control Design Based on Petri Nets Tool for a Serial Three-Phase Five-Level Multicellular Inverter Used as a Shunt Active Power Filter

Energies, 2021
In this work, we represent a shunt active power filter (SAPF) based on a serial three-phase flying capacitor multilevel inverter (FCMI) controlled by a Petri Nets representation (PNs). This structure is chosen for its significant performances.
Sana Othman, Mohamad Alaaeddin Alali, Lassaad Sbita, Jean-Pierre Barbot, Malek Ghanes   +4 more
doaj   +1 more source