Results 91 to 100 of about 101,355 (268)
Research on Unsteady Aerodynamic Interference for the Tiltrotor Aircraft in Hover
Hangkong gongcheng jinzhan, 2019 The high resolution numerical simulation for rotor/wing-body interaction flow-field in hover is crucial for the accurate prediction of aerodynamic performance of the tilt-rotor aircraft, and is the one of the important issues of helicopter aerodynamics ...
Sun Kaijun +3 more
doaj +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Burial mounds are key elements of Mediterranean funerary landscapes, but in intensively cultivated coastal plains their low‐relief expression is easily obscured by ploughing, levelling and rapidly changing surface conditions, making single‐date observations unreliable.
Salvatore Polverino +2 more
wiley +1 more source
Archaeological Prospection, EarlyView.ABSTRACT The detection of buried or obscured archaeological features remains a central challenge in landscape archaeology, particularly in the irrigated floodplains of Mesopotamia where levees and canals formed the basis of complex agrarian systems. This study presents a deep learning–based approach for the large‐scale, automated detection of ancient ...
Nazarij Buławka +4 more
wiley +1 more source
Autonomous Collision avoidance for Unmanned aerial systems [PDF]
, 2014 Unmanned Aerial System (UAS) applications are growing day by day and this will lead Unmanned Aerial Vehicle (UAV) in the close future to share the same airspace of manned aircraft.This implies the need for UAS to define precise safety standards ...
Melega, Marco
core
Geo-UAV: Teaching geoscientific drone-based data acquisition [PDF]
<p>Latest release of the Geo-UAV eBook that is accessible at https://unisvalbard.github.io/Geo-UAV/.</p> <p>Please see run.bat/Readme for compiling notes</p ...
Cohen, Sara Mollie +2 more
core +1 more source
DronesTo enhance path planning efficiency in unmanned aerial vehicle (UAV) search missions in complex environments, this paper proposes a coverage path planning (CPP) algorithm for a UAV that integrates the deep Q-network (DQN) with the A* algorithm (DQN-A ...
Hu Yuan +5 more
doaj +1 more source
Archaeological Prospection, EarlyView.ABSTRACT Medieval and early modern drowned villages in the intertidal zone of the Scheldt estuary (the Netherlands) constitute intriguing yet largely understudied components of north‐western Europe's underwater cultural heritage. Despite their high archaeological potential as time capsules of past settlement landscapes, research has remained limited ...
Jan Trachet +9 more
wiley +1 more source
Depth Image Processing for Obstacle Avoidance of an Autonomous VTOL UAV [PDF]
, 2006 We describe a new approach for stereo-based obstacle avoidance. This method analyzes the images of a stereo camera in realtime and searches for a safe target point that can be reached without collision.
Thielecke, Frank +2 more
core
Finite-Time Backstepping Control for Quadrotors With Disturbances and Input Constraints
IEEE Access, 2018 This paper proposes a novel finite-time backstepping framework combined with an auxiliary input-saturation compensator and applies it to tackle the trajectory tracking problem of quadrotors with disturbances and input constraints. Finite-time convergence
Tao Jiang, Defu Lin, Tao Song
doaj +1 more source
Archaeological Prospection, EarlyView.ABSTRACT This document is a report on the field application of non‐invasive geophysical and robotic prospecting methods at the submerged Neolithic site of La Marmotta (Lake Bracciano, Italy), within the LAHKE (LAke Heritage Knowledge and Exploration) project; the study focuses on the practical validation, adaptation and transfer of existing ...
dell' Erba Ramiro +4 more
wiley +1 more source