Results 111 to 120 of about 416,056 (360)

Optimal Maintenance Decision Based on Remaining Useful Lifetime Prediction for the Equipment Subject to Imperfect Maintenance

open access: yesIEEE Access, 2020
Focusing on the fact that the existing research on optimal maintenance decision for remaining useful lifetime (RUL) prediction and imperfect maintenance has low accuracy of RUL prediction and rationality of decision results, an optimal maintenance ...
Yunxiang Chen, Zezhou Wang, Zhongyi Cai
doaj   +1 more source

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

open access: yesAdvanced Intelligent Systems, EarlyView.
This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee   +9 more
wiley   +1 more source

Finite-Time Backstepping Control for Quadrotors With Disturbances and Input Constraints

open access: yesIEEE 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

Voxel‐SLAM: A Complete, Accurate, and Versatile Light Detection and Ranging‐Inertial Simultaneous Localization and Mapping System

open access: yesAdvanced Intelligent Systems, EarlyView.
: In this work, Voxel‐SLAM (simultaneous localization and mapping) is introduced: a complete, accurate, and versatile LiDAR (light detection and ranging) ‐inertial SLAM system consisting of five modules: initialization, odometry, local mapping (LM), loop closure (LC), and global mapping (GM), all employing the same map representation, an adaptive voxel
Zheng Liu   +9 more
wiley   +1 more source

Hiding in Plain Sight: Rethinking the Size and Complexity of Iron Age Hillforts in NW Iberia Thanks to Aerial Archaeology and Geophysics

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT This paper tackles one key limitation in the analysis of Iron Age communities in the Northwestern Iberian Peninsula: the limited exploration of areas beyond the fortified settlements known as castros (hillforts). The vast majority of archaeological studies have focused exclusively on the areas inside the walls of these settlements, which are ...
César Parcero‐Oubiña   +7 more
wiley   +1 more source

Research on Optimization of Maintenance Support Process of Aviation Equipment Based on MDP-GERT

open access: yesHangkong gongcheng jinzhan, 2019
Aiming at the problem that maintenance support capability in aviation equipment maintenance support is difficult to meet the requirement of maintenance support, a new optimization model of aviation equipment maintenance support process is proposed based ...
Guo Zhijun, Wang Ying, Sun Yun, Li Chao
doaj   +1 more source

Pharmaceutical UAV

open access: yes, 2023
Delivery drones have developed into a potentially feasible option for a multitude of industries and uses, such as e-commerce, logistics, and emergency services. The primary objective of employing delivery drones is to automate the delivery process in order to increase efficiency and save expenses.
Vadipina Amarnadh   +4 more
openaire   +1 more source

A Multisensor Remote Sensing Approach to Archaeological Prospection: Integrating UAV and Google Earth Data in the Bayan Gol Valley, Mongolia

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT This study investigates the effectiveness of drone‐based remote sensing and Google Earth satellite imagery for archaeological prospection in the Bayan Gol Valley, Central Mongolia. Utilizing a fixed‐wing unmanned aerial vehicle (UAV) equipped with RGB and multispectral sensors, we surveyed 655 ha to document Mongol‐period settlement structures
Peter Heimermann   +4 more
wiley   +1 more source

Real-Time UAV Autonomous Localization Based on Smartphone Sensors

open access: yesSensors, 2018
Localization in GPS-denied environments has become a bottleneck problem for small unmanned aerial vehicles (UAVs). Smartphones equipped with multi-sensors and multi-core processors provide a choice advantage for small UAVs for their high integration and ...
Boxin Zhao   +4 more
doaj   +1 more source

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