Results 71 to 80 of about 1,570 (179)

Transfer Learning‐Based Data‐Fusion Model Framework for State of Health Estimation of Power Battery Packs

Battery Energy, Volume 4, Issue 6, November 2025.
To handle nonlinearity and feature coupling, a data‐driven aging model is proposed, employing dual Gaussian Process Regressions and transfer learning to enhance model efficiency and accuracy. Adaptive filtering refines the model by integrating aging features and output capacity, resulting in a closed‐loop data fusion framework for SOH estimation ...
Zhiqiang Lyu, Xinyuan Wei, Longxing Wu, Chunhui Liu   +3 more
wiley   +1 more source

A Comparative Study on Battery Modelling via Specific Hybrid Pulse Power Characterization Testing for Unmanned Aerial Vehicles in Real Flight Conditions

World Electric Vehicle Journal
Battery modelling is essential for optimizing the performance and reliability of Unmanned Aerial Vehicles (UAVs), particularly given the challenges posed by their dynamic power demands and limited onboard computational resources. This study evaluates two
Waiard Saikong, Prasophchok Phumma, Suradet Tantrairatn, Chaiyut Sumpavakup   +3 more
doaj   +1 more source

Impedance-compensated grid synchronisation for extending the stability range of weak grids with voltage source converters [PDF]

, 2016
This paper demonstrates how the range of stable power transfer in weak grids with voltage source converters (VSCs) can be extended by modifying the grid synchronisation mechanism of a conventional synchronous reference frame phase locked loop (PLL).
D'Arco, Salvatore, Molinas Cabrera, Marta, Rodríguez Cortés, Pedro, Suul, Jon Are   +3 more
core   +2 more sources

Amplifier‐Based Programmable Metasurface for Bidirectional Full Polarization Enhancement

Small Structures, Volume 6, Issue 11, November 2025.
An amplifier‐based programmable metasurface is proposed to enhance bidirectional propagation of various polarized electromagnetic waves. The metasurface incorporates patch scatterers, reconfigurable phase shifters, and negative resistors to manipulate wave direction and improve wireless communication coverage. The Class‐E reflection amplifier minimizes
Xin Wang, Jia Qi Han, Kun Yi Zhang, De Xiao Xia, Hai Xia Liu, Long Li   +5 more
wiley   +1 more source

The analysis of the threshold value of the complex short-circuit ratio index and its significance in the context of static voltage stability

Frontiers in Energy Research
The short-circuit ratio index (SCR) can effectively quantify the voltage support strength in traditional DC grid-connected scenarios, yet it cannot reasonably describe the voltage support strength in diverse device grid connection scenarios.
Pan Lei, Jinquan Zhao
doaj   +1 more source

A High-Efficiency RF Harvester with Maximum Power Point Tracking

Proceedings, 2018
This paper presents the implementation of a high-efficiency radiofrequency (RF) harvester, which consists of a rectenna and a maximum power point tracker (MPPT).
Manel Gasulla, Francesc J. Robert, Josep Jordana, Edgar Ripoll-Vercellone, Jordi Berenguer, Ferran Reverter   +5 more
doaj   +1 more source

Accurate Assessment of Decoupled OLTC Transformers to Optimize the Operation of Low-Voltage Networks [PDF]

, 2019
Voltage control in active distribution networks must adapt to the unbalanced nature of most of these systems, and this requirement becomes even more apparent at low voltage levels. The use of transformers with on-load tap changers is gaining popularity,
Rodríguez del Nozal, Álvaro, Romero Ramos, Esther, Trigo García, Ángel Luis   +2 more
core   +1 more source

Enhanced Lithium‐Ion Battery Parameter Estimation and SOC Prediction via Variable Forgetting Factor Bi‐Loop Recursive Least Squares

Energy Science &Engineering, Volume 13, Issue 10, Page 4933-4943, October 2025.
ABSTRACT The reliability of parameter accuracy in lithium‐ion battery models plays a crucial role in the efficiency of state‐of‐charge (SOC) estimation methods that employ model‐based strategies. To address the limitations of traditional recursive least squares (RLS) algorithms in tracking dynamic battery characteristics, This paper introduces a bi ...
Wei Xia, Jinli Xu, Baolei Liu, Huiyun Duan   +3 more
wiley   +1 more source

Radiation Model for Small Horizontal Submodules [PDF]

, 2012
katedra elektromagnetického ...
Válek Martin
core  

An Improved Equivalent Circuit for Electric Field Sensors in Geophysical Exploration

Geophysical Prospecting, Volume 73, Issue 8, October 2025.
ABSTRACT In electromagnetic measurements, electric field sensors consist of two halves, with remote electrodes of negative and positive polarity coupled through wires and low pass filters to the differential inputs of an analogue‐to‐digital converter; the electrical ground of the analogue‐to‐digital converter is connected to the ground through a ...
Thomas Kalscheuer, Uwe Zimmermann, Henrik Sparr, Anton Palm Ekspong, Alexander Lindblad   +4 more
wiley   +1 more source