Results 61 to 70 of about 6,471 (208)

Parallel Parking Path Planning and Trajectory Tracking in Narrow Environments for Autonomous Unmanned Vehicles

Optimal Control Applications and Methods, EarlyView.
ABSTRACT To address the challenge of parallel parking in narrow environments, a multi‐segment path planning method is proposed for autonomous unmanned vehicles (AUVs), which integrates circular arc and dual clothoid curves, ensuring continuous path curvature and minimal longitudinal space occupancy.
Ziyang Zhang, Guangwei Cheng, Zhanzheng Guo, Hamid Reza Karimi, Yanyang Lu   +4 more
wiley   +1 more source

Validation and Assessment of Multi-GNSS Real-Time Precise Point Positioning in Simulated Kinematic Mode Using IGS Real-Time Service

Remote Sensing, 2018
Precise Point Positioning (PPP) is a popular technology for precise applications based on the Global Navigation Satellite System (GNSS). Multi-GNSS combined PPP has become a hot topic in recent years with the development of multiple GNSSs.
Liang Wang, Zishen Li, Maorong Ge, Frank Neitzel, Zhiyu Wang, Hong Yuan   +5 more
doaj   +1 more source

Improvement of Multi-GNSS Precision and Success Rate Using Realistic Stochastic Model of Observations

Remote Sensing, 2021
With the advancement of multi-constellation and multi-frequency global navigation satellite systems (GNSSs), more observations are available for high precision positioning applications.
Farinaz Mirmohammadian, Jamal Asgari, Sandra Verhagen, Alireza Amiri-Simkooei   +3 more
doaj   +1 more source

A Smart Camera With Integrated Deep Learning Processing for Disease Detection in Open Field Crops of Grape, Apple, and Carrot

Journal of Field Robotics, EarlyView.
ABSTRACT Downy mildew (Plasmopara), apple scab (Venturia inaequalis), and Alternaria leaf blight are endemic diseases that affect crops worldwide. The diseases can cause severe losses in grapes, apples and carrots when not detected and treated in an early stage.
Gerrit Polder, Pieter M. Blok, Tim van Daalen, Joseph Peller, Nikos Mylonas   +4 more
wiley   +1 more source

A Framework to Enable Eco‐Cyber‐Physical Systems for Robotics‐Focused Digital Twins in Smart Farming

Journal of Field Robotics, EarlyView.
ABSTRACT This paper introduces the R‐ECPS (Robotics‐focused Eco‐Cyber‐Physical System) framework for the development of robotics‐enabled digital twins, integrating human knowledge into the decision‐making process. Our framework adapts ECPS and Digital Twin (DT) definitions to agricultural field robotics.
Fiorella Sibona, Nicholas Harrison, Nathan Wallace, Conrad Stevens, Salah Sukkarieh, David Raubenheimer, Stephen J. Simpson, Luciano A. González   +7 more
wiley   +1 more source

Influence of station density and multi-constellation GNSS observations on troposphere tomography [PDF]

Annales Geophysicae, 2019
Troposphere tomography, using multi-constellation observations from global navigation satellite systems (GNSSs), has become a novel approach for the three-dimensional (3-D) reconstruction of water vapour fields.
Q. Zhao, K. Zhang, K. Zhang, W. Yao
doaj   +1 more source

Development and Performance Analysis of an Autonomous Agricultural Vehicle for Fruit Transportation

Journal of Field Robotics, EarlyView.
ABSTRACT Reducing product damage, preserving quality, and enhancing efficiency from harvest to consumption are crucial for sustainable agriculture. The integration of advanced information and communication technologies into agricultural practices plays a vital role in meeting these goals.
Dilara Gerdan Koc, Mustafa Vatandas
wiley   +1 more source

A comparison of established and digital surface model (DSM)‐based methods to determine population estimates and densities for king penguin colonies, using fixed‐wing drone and satellite imagery

Remote Sensing in Ecology and Conservation, EarlyView.
We used fixed‐wing drones and Beyond Visual Line of Sight flying to create high‐resolution imagery and Digital Surface Models (DSMs) of six large king penguin colonies (colony population sizes ranging from 10,671 to 132,577 pairs) in South Georgia. We used a novel DSM‐based method to facilitate automated and semi‐automated counts of each colony to ...
J. Coleman, N. Fenney, P.N. Trathan, A. Fox, E. Fox, A. Bennison, L. Ireland, M.A. Collins, P.R. Hollyman   +8 more
wiley   +1 more source

Real-Time Tropospheric Delays Retrieved from Multi-GNSS Observations and IGS Real-Time Product Streams

Remote Sensing, 2017
The multi-constellation Global Navigation Satellite Systems (GNSS) offers promising potential for the retrieval of real-time (RT) atmospheric parameters to support time-critical meteorological applications, such as nowcasting or regional short-term ...
Cuixian Lu, Xinghan Chen, Gen Liu, Galina Dick, Jens Wickert, Xinyuan Jiang, Kai Zheng, Harald Schuh   +7 more
doaj   +1 more source

Comprehensive review of innovative construction technology of high‐core rockfill dam: Nuozhadu project

River, EarlyView.
Abstract Underpinned by the ultrahigh‐core rockfill dam at the Nuozhadu Hydropower Station, comprehensive studies and engineering practices have been conducted to address several critical challenges: coordination of seepage deformation in dam materials, prevention and control of high‐water‐pressure seepage failure, static and dynamic deformation ...
Biao Liu, Zongliang Zhang, Lei Yan, Chao Liu, Mingxin Wu, Yuzhen Yu, Daren Zhang   +6 more
wiley   +1 more source