Results 71 to 80 of about 755 (156)
Beyond the European Army Illusion: A Prudent Strategy for the Real European Zeitenwende
JCMS: Journal of Common Market Studies, EarlyView.
Benjamin Daßler, Moritz Weiss
wiley +1 more source
Science Education, Volume 109, Issue 2, Page 605-626, March 2025.ABSTRACT This study contributes to discussions on facilitating students' sense‐making in science by analyzing the utterances of high‐achieving students in dialogues during practical work and identifying characteristics of their language use and learning processes.
Stein Dankert Kolstø +1 more
wiley +1 more source
MachinesAs the imaging distance and focal length of photoelectric systems increase, the requirements for line-of–sight stabilization of optical inertial stabilized platforms (ISPs) become higher.
Sansan Chang +3 more
doaj +1 more source
Research and Simulation of DC Microgrid Three-Phase AC-DC Converter Control Strategy Based on Double Loop [PDF]
, 2020 The new voltage and current double loop control strategy is proposed to solve the DC microgrid bus voltage fluctuation caused by loads fluctuation, parameters perturbation and unbalanced three-phase power supply.
Gao, Zhiqiang +4 more
core +1 more source
Towards a global understanding of tree mortality
New Phytologist, Volume 245, Issue 6, Page 2377-2392, March 2025.Summary Rates of tree mortality are increasing globally, with implications for forests and climate. Yet, how and why these trends vary globally remain unknown. Developing a comprehensive assessment of global tree mortality will require systematically integrating data from ground‐based long‐term forest monitoring with large‐scale remote sensing.
International Tree Mortality Network +114 more
wiley +1 more source
Vibration Suppression of AMBs-High Speed Motor Using an Enhanced Linear Extended State Observer
IEEE AccessIn order to solve the problem of rotor vibration caused by the unbalanced mass of the Active magnetic bearing (AMBs) rotor system, an Enhanced Linear Extended State Observer (ELESO) is designed based on the linear Extended State Observer (LESO). Firstly,
Lei Gong +4 more
doaj +1 more source
Robust and Adaptive Backstepping Control for Hexacopter UAVs
IEEE Access, 2019 A nonlinear robust and adaptive backstepping control strategy is hierarchically proposed to solve the trajectory tracking problem of hexacopter UAVs. Due to the under-actuated and coupled properties of the hexacopter dynamics, the nominal backstepping ...
Juqian Zhang +3 more
doaj +1 more source
On the Disturbance Rejection of a Piezoelectric Driven Nanopositioning System
IEEE Access, 2020 Nanopositioning systems are very popular and playing an increasingly vital role in micro and nano-scale positioning industry due to their unique ability to achieve high-precision and high-speed operation.
Wei Wei +3 more
doaj +1 more source
Longitudinal velocity control of autonomous driving based on extended state observer
CAAI Transactions on Intelligence Technology, Volume 10, Issue 1, Page 36-46, February 2025.Abstract Active Disturbance Rejection Control (ADRC) possesses robust disturbance rejection capabilities, making it well‐suited for longitudinal velocity control. However, the conventional Extended State Observer (ESO) in ADRC fails to fully exploit feedback from first‐order and higher‐order estimation errors and tracking error simultaneously, thereby ...
Hongbo Gao +13 more
wiley +1 more source
IEEE Access, 2020 Wind energy, as a kind of renewable natural energy, is spread all over the world. It is one of the most widely used and promising green energy to adjust the energy structure. Therefore, wind energy conversion systems (WECSs) have captured a great deal of
Youjie Ma +3 more
doaj +1 more source