Results 121 to 130 of about 44,118 (256)

Solving for Blameless and Optimal Control Under Prioritized Safety Constraints

Optimal Control Applications and Methods, Volume 47, Issue 3, Page 748-762, May/June 2026.
Summary of the proposed method for solving for blameless and optimal control sequences. ABSTRACT In many safety‐critical optimal control problems, users may request multiple safety constraints that are jointly infeasible due to external factors such as subsystem failures, unexpected disturbances, or fuel limitations.
Natalia Pavlasek, Behçet Açıkmeşe, Meeko Oishi, Claus Danielson   +3 more
wiley   +1 more source

Calculation Method of Transmission System Time Between Overhaul with Considering Running Time

Jixie chuandong, 2019
By establishing the mathematical model of helicopter transmission system running time and flight time, engine working time, the time ratio relation between running time and flight time is deduced, that is, conversion coefficient.
Wenbin Pan, Weizhen Liu, Huaipeng Li
doaj  

Efficacy evaluation of pneumatic solid set canopy delivery system to control powdery mildew (Erysiphe necator) in Washington vineyards

Pest Management Science, Volume 82, Issue 5, Page 4815-4828, May 2026.
The findings of this study indicate that powdery mildew control achieved with the pneumatic solid set canopy delivery system (PSD‐SSCDS) was comparable with that of a conventional airblast sprayer. These results highlight the PSD‐SSCDS as a promising alternative spray technology. Abstract BACKGROUND In this study, a previously optimized pneumatic spray
Dattatray G Bhalekar, Eric Mozzanini, Ramesh K Sahni, Michelle M Moyer, Lav R Khot   +4 more
wiley   +1 more source

Mapping River Bed Topography in Whitewater Rapids Using Bathymetric LiDAR

River Research and Applications, Volume 42, Issue 4, Page 886-900, May 2026.
ABSTRACT Bathymetric LiDAR captures river topography efficiently for clear and shallow water, but for mountain rivers, whitewater rapids still pose challenges. This study proposes a novel method to enable the extraction of bottom returns specifically in turbulent whitewater sections.
Jan Rhomberg‐Kauert, Theresa Himmelsbach, Florian Pöppl, Lucas Dammert, Martin Pfennigbauer, Gottfried Mandlburger   +5 more
wiley   +1 more source

An Engineering Model for Static Yawed Wind Turbines Based on Actuator Line Simulations and Symbolic Regression

Wind Energy, Volume 29, Issue 5, May 2026.
ABSTRACT Yaw engineering models are commonly used as add‐ons to the industrial blade element momentum (BEM) framework to improve load and power predictions by accounting for the skewed wake effect. However, existing yaw engineering models show noticeable limitations in accurately predicting the induced velocity distribution across the blade span.
Haoyuan Sun, Andrea Sciacchitano, Wei Yu
wiley   +1 more source

Wings or Handcuffs? The Dilemmas of Helicopter Parenting Based on a Systematic Literature Review

Social Sciences
Modern parenting styles cover a wide spectrum, from strict tiger parenting to supportive lighthouse parenting. Among these, helicopter parenting remains particularly controversial: while some consider it a protective approach, others believe that ...
Zsófia Kocsis, Dorka Kas, Gabriella Pusztai   +2 more
doaj   +1 more source

Swashplate control system [PDF]

, 1987
A mechanical system to control the position of a rotating swashplate is developed. This system provides independent lateral cyclic, longitudinal cyclic and collective pitch control of a helicopter rotor attached to the swashplate, without use of a mixer ...
Laub, Georgene H., Morse, H. Andrew, Peyran, Richard J.   +2 more
core   +1 more source

Annual survival in a dynamic species: pronghorn survival patterns across their northern range

Wildlife Biology, Volume 2026, Issue 3, May 2026.
Quantifying variation in demographic patterns, such as survival and recruitment, is critical for understanding population dynamics and informing evidence‐based and adaptive wildlife management. In this study, we leverage an extensive dataset from over 1000 GPS collared pronghorn Antilocapra americana to provide the first large‐scale evaluation of ...
Molly C. McDevitt, Anna K. Moeller, Andrew J. Lindbloom, Kelly Proffitt, Joshua J. Millspaugh, Paul M. Lukacs   +5 more
wiley   +1 more source

Snow Water Storage Within Eight Pacific Coastal Watersheds in British Columbia (Canada) Inferred From Four Years of Airborne Lidar Data

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Maritime mountain snowpacks are among the least understood and most poorly quantified components of global snow water storage, despite their vital role in sustaining water supplies and ecosystem health. Here, we present a 4‐year record of snow mass distribution across eight small‐to‐medium‐sized (5.2–63.4 km2) watersheds within the coastal ...
R. Bisset, W. C. Floyd, B. Menounos, A. Bishop, S. Marchenko, G. Fisk, A. Cebulski, P. Marshall, D. Heathfield, S. Beffort, R. White, S. Gonzalez Arriola, N. Viner   +12 more
wiley   +1 more source

Application of the Integral Energy Criterion and Neural Network Model for Helicopter Turboshaft Engines’ Vibration Characteristics Analysis

Energies
This article presents a vibration signal analysis method to diagnose helicopter turboshaft engine defects such as bearing imbalance and wear. The scientific novelty of the article lies in the development of a comprehensive approach to diagnosing ...
Serhii Vladov, Maryna Bulakh, Denys Baranovskyi, Eduard Kisiliuk, Victoria Vysotska, Maksym Romanov, Jan Czyżewski   +6 more
doaj   +1 more source