Relative pressure estimation from velocity measurements in blood flows: State-of-the-art and new approaches.
Sign Up to like & getrecommendations! Published in 2018 at "International journal for numerical methods in biomedical engineering"
DOI: 10.1002/cnm.2925
Abstract: The relative pressure difference across stenotic blood vessels serves as an important clinical index for the diagnosis of many cardiovascular diseases. While the clinical gold standard for relative pressure difference measurements is invasive catheterization, Phase-Contrast… read more here.
Keywords: relative pressure; pressure estimation; blood; velocity measurements ... See more keywords
Changes in Internal Carotid Artery Doppler Velocity Measurements With Different Angles of Insonation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Ultrasound in Medicine"
DOI: 10.1002/jum.15579
Abstract: Doppler velocity measurements are fundamental diagnostic criteria for vascular ultrasound examinations. Insonation angles are kept to 60° or less to minimize error. The purpose of this study was to assess variance of Doppler‐detected peak systolic… read more here.
Keywords: velocity; doppler; doppler velocity; different angles ... See more keywords
Simultaneous, two-camera, 2D gas-phase temperature and velocity measurements by thermographic particle image velocimetry with ZnO tracers
Sign Up to like & getrecommendations! Published in 2017 at "Experiments in Fluids"
DOI: 10.1007/s00348-017-2313-2
Abstract: This work presents simultaneous 2D temperature and velocity measurements on a heated jet using two non-intensified cameras to realize thermographic PIV. In contrast to previous studies which use separate PIV cameras and LIP cameras, the… read more here.
Keywords: laser; temperature velocity; temperature; ratio ... See more keywords
FAT-based robust adaptive control of electrically driven robots without velocity measurements
Sign Up to like & getrecommendations! Published in 2017 at "Nonlinear Dynamics"
DOI: 10.1007/s11071-017-3454-9
Abstract: Recently, regressor-free control approach has been presented in which uncertainties are estimated using function approximation techniques (FAT) such as the Fourier series expansion or Legendre polynomials. However, FAT-based observer design remains as an open problem.… read more here.
Keywords: robust adaptive; fat based; driven robots; electrically driven ... See more keywords
Determination of Asphaltene Critical Nanoaggregate Concentration Region Using Ultrasound Velocity Measurements
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-16294-5
Abstract: Asphaltenes constitute the heaviest, most polar and aromatic fraction of petroleum crucial to the formation of highly-stable water-in-crude oil emulsions. The latter occur during crude oil production as well as spills and cause difficulties to… read more here.
Keywords: velocity; determination asphaltene; asphaltene critical; concentration ... See more keywords
Entanglement-enhanced lidars for simultaneous range and velocity measurements
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review Letters"
DOI: 10.1103/physreva.96.040304
Abstract: Lidar is a well known optical technology for measuring a target's range and radial velocity. We describe two lidar systems that use entanglement between transmitted signals and retained idlers to obtain significant quantum enhancements in… read more here.
Keywords: entanglement enhanced; omega omega; velocity; velocity measurements ... See more keywords
Task Space Consensus of Heterogeneous Robots With Time-Delays and Without Velocity Measurements
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Control Systems Letters"
DOI: 10.1109/lcsys.2020.3041313
Abstract: This letter proposes a novel distributed control scheme for heterogeneous robot networks (kinematically and dynamically different), modeled as Euler-Lagrange systems, that solves the leaderless consensus problem in the Special Euclidean space of dimension three (SE(3)).… read more here.
Keywords: consensus; space; time delays; velocity measurements ... See more keywords
Task-Space Teleoperation With Time-Delays and Without Velocity Measurements via a Bounded Controller
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Control Systems Letters"
DOI: 10.1109/lcsys.2022.3232223
Abstract: This letter reports a novel controller for robot teleoperation systems in the task-space. The local and the remote robots are kinematically and dynamically different and they are modeled as Euler-Lagrange agents. We consider the realistic… read more here.
Keywords: velocity measurements; teleoperation; controller; task space ... See more keywords
Burst Overlap Coregistration for Sentinel-1 TOPS DInSAR Ice Velocity Measurements
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Geoscience and Remote Sensing Letters"
DOI: 10.1109/lgrs.2021.3062905
Abstract: The application of Sentinel-1 interferometry to ice velocity measurements has until recently been limited by the significant horizontal scene motion associated with ice flow, which causes phase discontinuities (and associated unwrapping problems) at burst boundaries… read more here.
Keywords: ice velocity; velocity measurements; ice; velocity ... See more keywords
Picking up Speed: Continuous-Time Lidar-Only Odometry Using Doppler Velocity Measurements
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2022.3226068
Abstract: Frequency-Modulated Continuous-Wave (FMCW) lidar is a recently emerging technology that additionally enables per-return instantaneous relative radial velocity measurements via the Doppler effect. In this letter, we present the first continuous-time lidar-only odometry algorithm using these… read more here.
Keywords: doppler velocity; odometry; velocity measurements; velocity ... See more keywords
Robust Distributed Average Tracking for Double-Integrator Agents Without Velocity Measurements Under Event-Triggered Communication
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Control of Network Systems"
DOI: 10.1109/tcns.2020.3038844
Abstract: This article focuses on an event-triggered mechanism to solve the distributed average tracking problem for double-integrator agents without velocity measurements. In some practical applications, velocity measurements may be unavailable due to technology and space limitations,… read more here.
Keywords: distributed average; communication; event; velocity measurements ... See more keywords