Results 11 to 20 of about 802,989 (266)

Trajectory Planning for Navigation Aiding of Autonomous Underwater Vehicles

open access: yesIEEE Access, 2020
Autonomous underwater vehicles can perform seabed surveys with a higher resolution and quality than from equivalent ship-mounted sensors. Although high-grade inertial navigation systems aided by Doppler velocity logs can operate without external position
Oystein Sture   +2 more
doaj   +1 more source

Cargo pallets real-time 3D positioning method based on computer vision

open access: yesThe Journal of Engineering, 2019
In storage environment, aiming at the problem of goods positioning when picking, the pallet is firstly recognised based on deep learning. Then, algorithm of obtaining the pose of the pallet by the image processing and Kinect sensor is proposed in this ...
Tianjian Li   +4 more
doaj   +1 more source

ULES: Underwater Localization Evaluation Scheme Under Beacon Node Drift Scenes

open access: yesIEEE Access, 2018
In underwater sensor localization scenes, beacon nodes (BNs) with known coordinates are deployed to localize unknown nodes (UNs). However, the BNs are likely to drift due to undercurrents, geological changes, and marine biological activities, which will ...
Zhaohui Chen   +4 more
doaj   +1 more source

New methods and functionalities for railway maintenance through a draisine prototype based on RADAR sensors

open access: yesIET Intelligent Transport Systems, 2023
Inspection of the railway tracks requires relying on a precise positioning system that accurately determines the location of potential failures and deficiencies. Therefore, measuring the speed and precise location of rail vehicles is essential.
Valentin Gomez‐Jauregui   +7 more
doaj   +1 more source

Measurement of a quantum particle position at two distant locations: a model

open access: yesActa Polytechnica, 2022
A simplified one-dimensional model of measurement of the position of a quantum particle by two distant detectors is considered. Detectors are modelled by quantum particles bounded in potential wells with just two bound states, prepared in the excited ...
Jaroslav Dittrich
doaj   +1 more source

Precise vehicle ego-localization using feature matching of pavement images [PDF]

open access: yesJournal of Intelligent and Connected Vehicles, 2020
Purpose – Precise vehicle localization is a basic and critical technique for various intelligent transportation system (ITS) applications. It also needs to adapt to the complex road environments in real-time.
Zijun Jiang   +4 more
doaj   +1 more source

Position-pose measurement of crane sway based on monocular vision

open access: yesThe Journal of Engineering, 2019
The method of spatial positioning and pose measurement using computer vision have been widely used in satellite docking, motion control systems, navigation and guidance areas. A monocular vision measurement method of the telescope's spatial pose based on
Fu Xing-yu, Niu Dan, Li Qi, Liu Jin-bo
doaj   +1 more source

A two‐stage iterative method for short‐wave source localisation

open access: yesIET Radar, Sonar & Navigation, 2023
Short‐wave source localisation has an important role in many fields. A two‐stage iterative algorithm is proposed based on the ionospheric virtual height (IVH) model using the direction of arrival (DOA) and time difference of arrival (TDOA) measurements ...
Linqiang Jiang   +4 more
doaj   +1 more source

POSITIVELY MEASURE EXPANSIVE AND EXPANDING [PDF]

open access: yesCommunications of the Korean Mathematical Society, 2014
Given a compact connected smooth boundaryless Riemannian manifold \(M\), the authors study the space \(C^1(M)\) of differentiable maps of \(M\) endowed with the \(C^1\)-topology. A map \(f\) is said to be \textit{expanding} if there are constants \(C>0\) and \(\lambda>1\) such that for every \(x\in M\) and every \(v\in T_xM\) for every \(n\geq0\), then
Ahn, Jiweon, Lee, Keonhee, Lee, Manseob
openaire   +2 more sources

Waypoint selection for unmanned aerial vehicle‐aided calibration in wireless positioning networks

open access: yesIET Radar, Sonar & Navigation, 2023
Deploying an unmanned aerial vehicle (UAV) to scatter positioning beacons and further calibrate their positions by obtaining range measurements enables the establishment of a wireless positioning network in GNSS‐denied environments where hand placement ...
Zhen Wu, Zheng Yao, Mingquan Lu
doaj   +1 more source

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