Results 131 to 140 of about 20,764 (282)

Vessel Geometry Estimation for Patients with Peripheral Artery Disease

Sensors
The estimation of vessels’ centerlines is a critical step in assessing the geometry of the vessel, the topological representation of the vessel tree, and vascular network visualization.
Hassan Saeed, Andrzej Skalski
doaj   +1 more source

Vector Field‐Based Collision‐Free Navigation in Tunnel‐Like Environments

Journal of Field Robotics, EarlyView.
ABSTRACT Tunnel‐like environments, renowned for their vast scale, confined spaces, and limited visibility, present significant challenges for autonomous robot navigation. This study addresses the critical issue of guiding robots through such environments while ensuring collision‐free navigation and maintaining a specified safety margin from both tunnel
Bao Jianjun, Licheng Feng, Yueqi Wang, Kai Zhao, Binghao Li, Liao Wu   +5 more
wiley   +1 more source

A Novel Crawling Robot Based on the Hexagonal Mesh Structure and Enhanced PID Control Strategy

Journal of Field Robotics, EarlyView.
ABSTRACT The locomotion of crawling robots is similar to that of caterpillars, relying on foot adhesion and body contraction to ensure flexible movement without compromising stability. However, most existing pneumatic soft crawling robots are incapable of simultaneously achieving forward, backward, turning, and climbing capabilities.
Meng Hongjun, Ren Yuke, Wei Jingtao, Zhang Shupeng, Zhang Wei   +4 more
wiley   +1 more source

Enhanced Multi-Threshold Otsu Algorithm for Corn Seedling Band Centerline Extraction in Straw Row Grouping

Agronomy
Straw row grouping is vital in conservation tillage for precision seeding, and accurate centerline extraction of the seedling bands enhances agricultural spraying efficiency.
Yuanyuan Liu, Yuxin Du, Kaipeng Zhang, Hong Yan, Zhiguo Wu, Jiaxin Zhang, Xin Tong, Junhui Chen, Fuxuan Li, Mengqi Liu, Yueyong Wang, Jun Wang   +11 more
doaj   +1 more source

Virtual Elastic Tether: A New Approach for Multi‐Agent Navigation in Confined Aquatic Environments

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater navigation is a challenging area in the field of mobile robotics due to inherent constraints in self‐localization and communication in underwater environments. Some of these challenges can be mitigated by using collaborative multi‐agent teams.
Kanzhong Yao, Xueliang Cheng, Keir Groves, Barry Lennox, Ognjen Marjanovic, Simon Watson   +5 more
wiley   +1 more source

An Effective Retinal Blood Vessel Segmentation by Using Automatic Random Walks Based on Centerline Extraction. [PDF]

Biomed Res Int, 2020
Gao J, Chen G, Lin W.
europepmc   +1 more source

A Tool for Prioritizing Gravel Augmentation Reaches for Sediment Starved Rivers

River Research and Applications, EarlyView.
ABSTRACT Gravel augmentation is a widely used restoration technique used to improve habitat below dams, including salmonids spawning habitat. However, gravel augmentation can be cost‐prohibitive, and it is often unclear which stream segments have the highest potential to benefit spawning salmonids.
Patricia J. Wohner, Peter A. Samarin, James T. Peterson   +2 more
wiley   +1 more source

Performance of a magnetic multipole line-cusp argon ion thruster [PDF]

A 17 cm diameter line cusp ion thruster was evaluated with inert gases which are candidate propellants for on orbit and orbit transfer propulsion functions for Large Space Systems.
Sovey, J. S.
core   +1 more source

Geospatial technology based evaluation of recent morphodynamic changes and flow patterns in the upper Jhelum River

River, EarlyView.
Abstract This study was conducted to address the concerns over the changes in river morphology and their implications for sustainable river management. It investigates the morphological dynamics of the Upper Jhelum River between 2018 and 2023, using high‐resolution Sentinel‐2 imagery and advanced geospatial techniques to capture subtle yet significant ...
Sumaira Javaid, Pervez Ahmed, Akhtar Alam, Mohd Wasit Manhas, Srija Roy   +4 more
wiley   +1 more source

Integration of spectral indices and precipitation data to assess river morphometric features in a tropical semi-humid environment

Environmental Challenges
In mixed fluvial corridors, calculating a mobility zone is important due to the geometric instability caused by abrupt channel changes. Thus, this work aims to develop a reproducible remote sensing workflow using eight optical indices and a random forest
Jairo Dueñas-Tovar, María Jaya-Montalvo, André Luiz Lopes de Faria, Fernando Morante-Carballo   +3 more
doaj   +1 more source