Results 101 to 110 of about 22,474 (244)

A Physics‐Informed Koopman Operator Framework for Decentralized Discrete‐Time Sequential Control of a Modular Aerial Parcel Delivery Robot

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This paper presents a Physics‐Informed Koopman Operator (PIKO) framework integrated with a discrete‐time Sequential Action Control (SAC) for real‐time, decentralized control of a modular aerial parcel delivery robot composed of multiple independently actuated propeller modules.
Archit Krishna Kamath, Peng Shi, Ramesh K. Agarwal   +2 more
wiley   +1 more source

Designing for biodiversity data in place: Species, encounters, and interfaces

People and Nature, EarlyView.
Abstract Species occurrence data, which records the presence of an organism at a point in space and time, is central to environmental science and its opening up to new forms of participation such as citizen science. Such data are increasingly aggregated and mobilised, reaching diverse audiences.
Mitchell Whitelaw, Adrian Mackenzie, Martin Westgate, Kylie Morrow   +3 more
wiley   +1 more source

The shared benefits of fallen fruits: A novel mechanism stabilizing a nursery pollination mutualism between Sambucus and kateretid beetles

PLANTS, PEOPLE, PLANET, EarlyView.
Understanding how cooperative interactions remain stable matters for biodiversity because many plants rely on specialist insects that can also impose reproductive costs. We studied the interaction between Sambucus sieboldiana and seed‐consuming Heterhelus beetles through detailed field observations and pollination experiments.
Suzu Kawashima, Hidehito Okada, Sadatomo Hisamatsu, Kenji Suetsugu   +3 more
wiley   +1 more source

Dependable requirements for hovering information

, 2007
Hovering information is a new concept denoting infor-mation that stays attached to a specific geographical lo-cation rather than to a specific host. As a result, when deployed over a mobile set of peers, hovering information than ”hovers ” from host to ...
Alfredo Villalba, Dimitri Konstantas, Marzo Serugendo, Giovanna Di   +3 more
core  

The role of the synoptic‐scale conditions in driving fog and mist during the FATIMA July 2022 Sable Island Field program

Quarterly Journal of the Royal Meteorological Society, EarlyView.
ERA5 hourly 325‐m and 1512‐m (a) convergence and (b) vertical motion (actually pressure change with sign reversed to compare with convergence) over Sable Island around the time of an event. The mist (green) and fog (red) occurrences at the surface station are shown at the bottom of the figures. A 325‐m fitted line convergence was positive for the first
Clive E. Dorman, Darko Koračin, Reneta Dimitrova, Ismail Gultepe, Sebastian W. Hoch, Jesus Ruiz‐Plancarte, Qing Wang, Alexei Perelet, H. J. S. Fernando   +8 more
wiley   +1 more source

Adaptive RBF network based sliding mode controller with novel switching term for hovering deep sea mining vehicle trajectory tracking

Journal of Ocean Engineering and Science
Hovering deep-sea mining provides a new direction for deep-sea nodule mining; however, accurate trajectory tracking of hovering mining vehicle remains a key challenge.
Jialuan Xiao, Zida Shan, Junjun Cao, Yanjie Sun, Yang Cao, Xinguang Du, Baoheng Yao, Caoyang Yu, He Zhang   +8 more
doaj   +1 more source

Revisiting bare‐ground evaporation in a high‐resolution numerical weather prediction system

Quarterly Journal of the Royal Meteorological Society, EarlyView.
An improved method is proposed to parameterize evaporation in numerical weather prediction models. The figure shows dew‐point temperature forecast error (standard deviation of forecast error and bias) versus lead time over the North Plains region during spring 2022 for three parameterizations: CTL, the α$$ \alpha $$ method of Jacquemin and Noilhan; IFS:
Vincent Fortin, Marc Verville, Vincent Vionnet, Marco Carrera, Dorothée Charpentier   +4 more
wiley   +1 more source

Study on aerodynamic interference between helicopter hovering rotor and plateau complex terrain

Kongqi donglixue xuebao
The interference of turbulence induced by valley terrain on helicopter rotors has a profound impact on aerodynamic characteristics and flight safety.
Wei Zhang, Guoqiang Li, Zhongpu Gao, Miaomiao Xing   +3 more
doaj   +1 more source

Privacy‐Preserving Data‐Driven Distributed MPC for Heterogeneous Nonlinear Multi‐Agent Systems

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Distributed model predictive control (DMPC) is a cornerstone for coordinating multi‐agent systems, yet simultaneously ensuring data privacy, handling unknown nonlinear dynamics, and managing heterogeneous constraints remains an open challenge.
Mahmood Mazare, Hossein Ramezani
wiley   +1 more source

Helicopter hovering performance studies

, 1976
Issued as Progress report, and Final report, Project no.
Gray, Robin B., McMahon, Howard Martin
core   +1 more source