Synonyme wurden verwendet für: Iss
Suche ohne Synonyme: title: Drones, Vol 7, Iss 3, p 190 (2023)

81–100 von 116 Ergebnissen
|

    Modulation Recognition of Low-SNR UAV Radar Signals Based on Bispectral Slices and GA-BP Neural Network

    Freier Zugriff
    Xuemin Liu / Yaoliang Song / Kuiyu Chen et al. | DOAJ | 2023
    challenging conditions with an SNR as low as −3 dB, the recognition accuracy for the five different radar signals exceeds 90%. Our research aims to ...

    An Experimental and Numerical Evaluation of the Aerodynamic Performance of a UAV Propeller Considering Pitch Motion

    Freier Zugriff
    Zhitao Zhang / Changchuan Xie / Wei Wang et al. | DOAJ | 2023
    oscillation amplitude of 1-blade’s out-plane force and torque increases by 57.122% and 66.542% for the 5 Hz-5 deg case compared with the 5 Hz-3 deg ...

    Research of an Unmanned Aerial Vehicle Autonomous Aerial Refueling Docking Method Based on Binocular Vision

    Freier Zugriff
    Kun Gong / Bo Liu / Xin Xu et al. | DOAJ | 2023
    , and the attitude estimation error of the pitch and yaw angle is less than ±0.5°; and (3) through comparison experiments with the existing ...

    Urban Forest Above-Ground Biomass Estimation Based on UAV 3D Real Scene

    Freier Zugriff
    Yinyin Zhao / Lv Zhou / Chao Chen et al. | DOAJ | 2023
    -tree AGB models were developed based on structural parameters. (3) Results: The results of this study indicated the following: (A) The UAV ...

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

    Freier Zugriff
    Juan Wang / Xiaoyi Lv / Bohong Wang et al. | DOAJ | 2023
    3WQF120-12 plant protection UAV, the recommended flight height is 1–3 m, the recommended flight speed is below 3 m/s, and the recommended ambient ...

    A Robust Disturbance-Rejection Controller Using Model Predictive Control for Quadrotor UAV in Tracking Aggressive Trajectory

    Freier Zugriff
    Zhixiong Xu / Li Fan / Wei Qiu et al. | DOAJ | 2023
    (3) space, which enables continuous control on the ...

    Assessment of UAS Photogrammetry and Planet Imagery for Monitoring Water Levels around Railway Tracks

    Freier Zugriff
    Juan Pablo Arroyo-Mora / Margaret Kalacska / Alireza Roghani et al. | DOAJ | 2023
    time. We evaluated the utility of satellite imagery (Planet Dove constellation at 3 m pixel size) at the landscape level to assess overall ...
    Schlagwörter: drones

    Minimal Energy Routing of a Leader and a Wingmate with Periodic Connectivity

    Freier Zugriff
    Sai Krishna Kanth Hari / Sivakumar Rathinam / Swaroop Darbha et al. | DOAJ | 2023
    3 + 3 ρ 4 when ...

    Efficient Focus Autoencoders for Fast Autonomous Flight in Intricate Wild Scenarios

    Freier Zugriff
    Kaiyu Hu / Huanlin Li / Jiafan Zhuang et al. | DOAJ | 2023
    algorithm outperformed existing trajectory-based optimization approaches at flight speeds exceeding 3 m/s in multiple testing environments, which ...

    Estimating Effective Leaf Area Index of Winter Wheat Based on UAV Point Cloud Data

    Freier Zugriff
    Jie Yang / Minfeng Xing / Qiyun Tan et al. | DOAJ | 2023
    -derived 3-D point cloud-based method to automatically calculate crop-effective LAI (LAIe). In this method, the 3-D winter wheat point cloud data ...

    Impacts of Drone Flight Altitude on Behaviors and Species Identification of Marsh Birds in Florida

    Freier Zugriff
    Jeremy P. Orange / Ronald R. Bielefeld / William A. Cox et al. | DOAJ | 2023
    Unmanned aerial vehicles (hereafter drones) are rapidly replacing manned aircraft as the preferred tool used for aerial wildlife surveys ...

    Strapdown Celestial Attitude Estimation from Long Exposure Images for UAV Navigation

    Freier Zugriff
    Samuel Teague / Javaan Chahl | DOAJ | 2023
    than 0.13 degrees in the yaw axis, and 0.06 degrees in the pitch and roll axes (3 ...

    Study on the Design and Experiment of Trichogramma Ball Delivery System Based on Agricultural Drone

    Freier Zugriff
    Cancan Song / Qingyu Wang / Guobin Wang et al. | DOAJ | 2023
    drones have the advantages of low-altitude and high-speed operations and have been well applied and widely recognized in the field of ...

    Multi-UAV Cooperative Trajectory Planning Based on FDS-ADEA in Complex Environments

    Freier Zugriff
    Gang Huang / Min Hu / Xueying Yang et al. | DOAJ | 2023
    trajectories are smoothed to ensure the flyability of the UAVs performing the mission by combining the cubic B-spline curves. Experiments 1, 2, 3, and ...

    Identifying Important Bird and Biodiversity Areas in Antarctica Using RPAS Surveys—A Case Study of Cape Melville, King George Island, Antarctica

    Freier Zugriff
    Katarzyna Fudala / Robert Józef Bialik | DOAJ | 2023
    Area; (2) based on the RPAS flight, a new boundary of the Cape Melville IBA is proposed; (3) the threshold value (based on >1% of species) to ...

    UAV-Based Subsurface Data Collection Using a Low-Tech Ground-Truthing Payload System Enhances Shallow-Water Monitoring

    Freier Zugriff
    Aris Thomasberger / Mette Møller Nielsen | DOAJ | 2023
    these limitations, a payload system was developed to collect subsurface data in the form of videos and depth measurements. In a 7 ha large study ...
    Schlagwörter: drones

    Effect of Operational Parameters of Unmanned Aerial Vehicle (UAV) on Droplet Deposition in Trellised Pear Orchard

    Freier Zugriff
    Peng Qi / Lanting Zhang / Zhichong Wang et al. | DOAJ | 2023
    conducted in an FT orchard, and a four-factor (SV: Spray application volume rate, FS: Flight speed, FH: Flight height, FD: Flight direction) and 3 ...

    Automatic Recognition of Black-Necked Swan (Cygnus melancoryphus) from Drone Imagery

    Freier Zugriff
    Marina Jiménez-Torres / Carmen P. Silva / Carlos Riquelme et al. | DOAJ | 2023
    Ecological monitoring programs are fundamental to following natural-system populational trends. Drones are a new key to animal monitoring ...

    GCP and PPK Utilization Plan to Deal with RTK Signal Interruption in RTK-UAV Photogrammetry

    Freier Zugriff
    Jung Min Cho / Byoung Kil Lee | DOAJ | 2023
    accuracy within 3 GSD up to a radius of 1 km from the GCP. ...

    Improved Crop Biomass Algorithm with Piecewise Function (iCBA-PF) for Maize Using Multi-Source UAV Data

    Freier Zugriff
    Lin Meng / Dameng Yin / Minghan Cheng et al. | DOAJ | 2023
    using VI, probably because the temporal trends of CVMVI and AGB were similar in the maize growing season. (3) The best estimation ...