Showing 121 - 140 results of 150 for search '"helicopter"', query time: 0.03s Refine Results
  1. 121

    Rare Imaging of Fat Embolism Seen on Computed Tomography in the Common Iliac Vein after Polytrauma by Hojun Lee, Jonghwan Moon, Junsik Kwon, John Cook-Jong Lee

    Published 2018-08-01
    “…Forty-eight-year-old male with pedestrian traffic accident ransferred from a local hospital by helicopter to the regional trauma center by two flight surgeons on board. …”
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  2. 122

    A Survey of Transportation Problems by Ocotlán Díaz-Parra, Jorge A. Ruiz-Vanoye, Beatriz Bernábe Loranca, Alejandro Fuentes-Penna, Ricardo A. Barrera-Cámara

    Published 2014-01-01
    “…Some problems are as follows: bus scheduling problem, delivery problem, combining truck trip problem, open vehicle routing problem, helicopter routing problem, truck loading problem, truck dispatching problem, truck routing problem, truck transportation problem, vehicle routing problem and variants, convoy routing problem, railroad blocking problem (RBP), inventory routing problem (IRP), air traffic flow management problem (TFMP), cash transportation vehicle routing problem, and so forth.…”
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  3. 123

    An Improved Fast Flocking Algorithm with Obstacle Avoidance for Multiagent Dynamic Systems by Jialiang Wang, Hai Zhao, Yuanguo Bi, Shiliang Shao, Qian Liu, Xingchi Chen, Ruofan Zeng, Yu Wang, Le Ha

    Published 2014-01-01
    “…Finally, the proposed FMOA algorithm is used to conduct the formation flying of these quad-rotor helicopters in the smart environment.…”
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  4. 124

    Vibration and Performance Analyses Using Individual Blade Pitch Controls for Lift-Offset Rotors by Jae-Sang Park, Do-Hyung Kim, Sanghyun Chae, Ye-Lin Lee, Jeong-In Go

    Published 2019-01-01
    “…As a lift-offset rotor for the present study, the rigid coaxial rotor of a XH-59A compound helicopter is considered and CAMRAD II is used to predict the hub vibration and rotor performance. …”
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  5. 125

    A Multibody Model of Tilt-Rotor Aircraft Based on Kane’s Method by Jianmin Su, Chengyue Su, Sheng Xu, Xiaoxing Yang

    Published 2019-01-01
    “…A tilt-rotor aircraft can switch between two flight configurations (the helicopter configuration and the fixed-wing plane configuration) by tilting its rotors. …”
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  6. 126

    Arrhythmias Occurring in Children during HEMS Intervention: A Retrospective Cohort Study by Piotr Konrad Leszczyński, Arkadiusz Wejnarski, Patryk Rzońca, Angelika Gajowniczek, Robert Gałązkowski, Kryspin Mitura, Daryna Sholokhova

    Published 2023-01-01
    “…Arrhythmias in patients during medical transport remain a challenge for medical personnel. Helicopter emergency medical service (HEMS) crews, as the only medical rescue teams in Poland to conduct rescue flights, keep detailed documentation of monitoring vital functions over short time intervals during the flight. …”
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  7. 127
  8. 128

    Pre-Hospital and In-Hospital Management of an Abdominal Impalement Injury Caused by a Tree Branch by So Ra Ahn, Joo Hyun Lee, Keun Young Kim, Chan Yong Park

    Published 2021-12-01
    “…The patient was transported by a medical helicopter and had stable vital signs at admission. …”
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  9. 129

    New Method for Analyzing the Flutter Stability of Hingeless Blades with Advanced Geometric Configurations in Hovering by Si-wen Wang, Jing-long Han, Quan-long Chen, Hai-wei Yun, Xiao-mao Chen

    Published 2020-01-01
    “…A new method used to analyze the aeroelastic stability of a helicopter hingeless blade in hovering has been developed, which is especially suitable for a blade with advanced geometric configuration. …”
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  10. 130

    Antarctic ice-shelf meltwater outflows in satellite radar imagery: ground-truthing and basal channel observations by Jakob Stanley Hamann, Thomas Arney, James David Kirkham, Paul Wachter, Karsten Gohl

    Published 2024-01-01
    “…The resulting smooth water surfaces were observed adjacent to the surface expression of deep basal channels, documented in a helicopter survey along part of the Bellingshausen Sea ice edge. …”
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  11. 131

    Main Rotor Wake Interference Effects on Tail Rotor Thrust in Crosswind by Chang Wang, Min Qi Huang, Shuai Ma, Hao Wen Wang, Min Tang

    Published 2021-01-01
    “…As understanding of this interaction is vital for the early warning strategy development, the MR wake influence effect on TR thrust and the effect of helicopter yaw stability are examined in this study. …”
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  12. 132

    Multimode/Multifrequency Low Frequency Airborne Radar Design by Sandra Costanzo, Giuseppe Di Massa, Antonio Costanzo, Antonio Borgia, Claudio Papa, Giovanni Alberti, Giuseppe Salzillo, Gianfranco Palmese, Dario Califano, Luca Ciofanello, Maria Daniele, Claudia Facchinetti, Francesco Longo, Roberto Formaro

    Published 2013-01-01
    “…The radar has been installed on a civil helicopter and its operation has been validated in flight in both sounder and imager modality. …”
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  13. 133

    The reliably stable neural network controllers' synthesis with the transient process parameters optimization by Serhii Vladov, Anatoliy Sachenko, Victoria Vysotska, Yevhen Volkanin, Dmytro Kukharenko, Danylo Severynenko

    Published 2024-11-01
    “…This study is the first to develop a method for synthesizing a stabilizing neural network controller for helicopter turboshaft engines with guaranteed system stability based on Lyapunov theory. …”
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  14. 134

    Gyrfalcon Prey Abundance and Their Habitat Associations in a Changing Arctic by Michaela Gustafson, Jennifer D. McCabe, Brian W. Rolek, Travis L. Booms, Michael T. Henderson, Leah Dunn, David L. Anderson, Jennyffer Cruz

    Published 2025-01-01
    “…Third, we aimed to evaluate whether Gyrfalcons were more likely to occupy territories with higher prey densities using a multi‐season occupancy model coupled with occupancy observations from helicopter surveys conducted during 2016–2022 at 97 Gyrfalcon territories. …”
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  15. 135

    Profiling Near-surface Winds on Mars Using Attitude Data from Mars 2020 Ingenuity by Brian Jackson, Lori Fenton, Travis Brown, Asier Munguira, German Martinez, Claire Newman, Daniel Viúdez-Moreiras, Matthew Golombek, Ralph Lorenz, Mark D. Paton, Dylan Conway

    Published 2025-01-01
    “…We used attitude data from the Mars Ingenuity helicopter with a simple steady-state model to estimate wind speeds and directions at altitudes between 3 and 24 m, the first time winds at such altitudes have been probed on Mars. …”
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  16. 136
  17. 137

    Design of a launch and control unit for anti-unmanned system on a boat by LI Erlei, ZHANG Fazhi

    Published 2025-02-01
    “…With the help of detection equipment, it can effectively deter and strike small and medium-sized UAVs, unmanned helicopters, suicide USVs, etc. in the airspace below 5 000 meters. …”
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  18. 138

    A Dynamic Motion Tracking Control Approach for a Quadrotor Aerial Mechanical System by Hugo Yañez-Badillo, Francisco Beltran-Carbajal, Ruben Tapia-Olvera, Antonio Valderrabano-Gonzalez, Antonio Favela-Contreras, Julio C. Rosas-Caro

    Published 2020-01-01
    “…A novel dynamic control method for desired motion reference trajectory tracking for quadrotor helicopters is introduced. Measurements of position output signals for efficient and robust tracking of motion profiles specified for the unmanned aerial vehicle are only required. …”
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  19. 139

    Planetary Gearbox Vibration Signal Characteristics Analysis and Fault Diagnosis by Qiang Miao, Qinghua Zhou

    Published 2015-01-01
    “…Planetary gearboxes are widely used in helicopters, wind turbines, mining machinery, and so forth. …”
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  20. 140

    Development of a Solar-Powered Edge Processing Perimeter Alert System with AI and LoRa/LoRaWAN Integration for Drone Detection and Enhanced Security by Mateo Mejia-Herrera, Juan Botero-Valencia, José Ortega, Ruber Hernández-García

    Published 2025-01-01
    “…Although drone detection has received great research attention, the ability to identify helicopters expands the spectrum of aerial threats that can be detected. …”
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