Results 21 to 30 of about 11,538 (196)

The computational fluid dynamic modeling of downwash flow field for a six-rotor UAV [PDF]

open access: yesFrontiers of Agricultural Science and Engineering, 2018
The downwash flow field of the multi-rotor unmanned aerial vehicle (UAV), formed by propellers during operation, has a significant influence on the deposition, drift and distribution of droplets as well as the spray width of the UAV for plant protection.
Yongjun ZHENG, Shenghui YANG, Xingxing LIU, Jie WANG, Tomas NORTON, Jian CHEN, Yu TAN
doaj   +1 more source

Polygonal plot scaling method for plant protection of rotor-like UAVs [PDF]

open access: yesE3S Web of Conferences, 2021
In this paper, a universal polygonal block boundary method is proposed to solve the problem of integral shrinkage and integral expansion of the boundary of the operation area when facing complex operation area boundary and obstacle boundary in the plant protection process of rotor-wing unmanned aerial vehicles (UAVs).
openaire   +2 more sources

Effect of flight velocity on droplet deposition and drift of combined pesticides sprayed using an unmanned aerial vehicle sprayer in a peach orchard

open access: yesFrontiers in Plant Science, 2022
Extensive research has been conducted on plant protection unmanned aerial vehicle (UAV) chemical application technology in recent years owing to its importance as a means of pest and disease control.
Longlong Li   +16 more
doaj   +1 more source

Advancing Agricultural Production With Machine Learning Analytics: Yield Determinants for California's Almond Orchards. [PDF]

open access: yes, 2020
Agricultural productivity is subject to various stressors, including abiotic and biotic threats, many of which are exacerbated by a changing climate, thereby affecting long-term sustainability.
Brown, Patrick H   +3 more
core   +3 more sources

Development of canopy vigour maps using UAV for site-specific management during vineyard spraying process [PDF]

open access: yes, 2019
Site-specific management of crops represents an important improvement in terms of efficiency and efficacy of the different labours, and its implementation has experienced a large development in the last decades, especially for field crops.
Campos Tobajas, Javier   +6 more
core   +2 more sources

Numerical Simulation and Analysis of Droplet Drift Motion under Different Wind Speed Environments of Single-Rotor Plant Protection UAVs

open access: yesDrones, 2023
Unmanned aerial vehicles (UAVs) have been widely used in plant protection, and the mechanism of droplet deposition drift while spraying with the 3WQF120-12 produced by Quanfeng Aviation, a representative model of single-rotor plant protection UAVs in ...
Juan Wang   +6 more
doaj   +1 more source

Remotely piloted aircraft systems and a wireless sensors network for radiological accidents [PDF]

open access: yes, 2016
In critical radiological situations, the real time information that we could get from the disaster area becomes of great importance. However, communication systems could be affected after a radiological accident.
Barrado Muxí, Cristina   +4 more
core   +2 more sources

Plant Protection UAV Operation Recommendation Using Storm Framework

open access: yesIFAC-PapersOnLine, 2019
Abstract A scientific and reasonable recommendation algorithm for plant-protecting UAV (Unmanned Aerial Vehicle) operating helps UAV renters with optimal and economical solutions, as well improves the efficiency of plant protecting work and its management.
Lihua Zheng   +4 more
openaire   +1 more source

Vegetation Dynamics in Ecuador [PDF]

open access: yes, 2019
Global forest cover has suffered a dramatic reduction during recent decades, especially in tropical regions, which is mainly due to human activities caused by enhanced population pressures.
González-Jaramillo, Víctor Hugo
core   +1 more source

Design of an embedded microcomputer based mini quadrotor UAV [PDF]

open access: yes, 2007
This paper describes the design and realization of a mini quadrotor UAV (Unmanned Aerial Vehicle) that has been initiated in the Systems and Control Laboratory at the Computer and Automation Research institute of the Hungarian Academy of Science in ...
Bauer, Péter   +4 more
core   +1 more source

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