Results 101 to 110 of about 6,891,147 (192)

OF-PhyNet: A Hybrid Neural Network Method for River Surface Velocity Measurement Based on Optical Flow and Physical Constraints

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Measuring river surface velocity is crucial for hydrological monitoring. However, traditional methods exhibit significant limitations under extreme weather conditions and emergency scenarios.
Minghu Zhang, Lianpo Ma, Yingying Chen, Xin Li   +3 more
doaj   +1 more source

Investigation on spatial breakup characteristics of low-pressure jets with particle image velocimetry experiment and volume of fluid–level set simulation

Advances in Mechanical Engineering, 2016
In order to study the spatial breakup characteristics of the initial section of low-pressure jets, an experiment was performed to investigate the flow fields and concentration fields of jet flows with different nozzle geometric parameters and also the ...
Yue Jiang, Hong Li, Qingjiang Xiang, Chao Chen   +3 more
doaj   +1 more source

Mixing‐Driven Defects and Composition Evolution in Multi‐Material Metal Additive Manufacturing

Advanced Science, Volume 13, Issue 45, 13 August 2026.
Operando synchrotron X‐ray imaging coupled with high‐fidelity multiphysics modeling uncovers how inter‐material mixing reshapes keyhole dynamics and drives distinct pore‐formation pathways in multi‐material laser powder bed fusion (LPBF). Composition‐dependent instabilities trigger defects, whereas rescanning suppresses porosity and homogenizes Cu ...
Zhilang Zhang, Steve Gaudez, Mario Togni, Steven Van Petegem, Markus Bambach, Mamzi Afrasiabi   +5 more
wiley   +1 more source

Image Flow Measurement Based on the Combination of Frame Difference and Fast and Dense Optical Flow

工程科学与技术, 2022
Due to its simplicity, efficiency and safety, image velocimetry has gained widespread attention and is beginning to be used in domestic and international hydrographic stations.
Jianping WANG, Rui ZHU, Guo ZHANG, Xingbo HE, Rupeng CAI   +4 more
doaj  

Cteno‐Bot: An Untethered Metachronally Swimming Robot With Magnetoactive Propulsors

Advanced Intelligent Systems, Volume 8, Issue 8, August 2026.
We present Cteno‐bot, an untethered ctenophore‐inspired robot which swims using metachronally coordinated appendages. A single mechanism controls up to 216 magnetoactive propulsors via a dynamically varying magnetic field. We show that the swimming speed of the robot can be increased without a corresponding increase in power requirement, simply by ...
David J. Peterman, Margaret L. Byron
wiley   +1 more source

Uncertainty quantification for ultrasound image velocimetry

Journal of the Royal Society Interface
Abstract Ultrasound image velocimetry (UIV) is a non-invasive method with high temporal–spatial resolution for measuring flow velocity in opaque media, particularly in biomedical fields. Velocity measurement uncertainty propagates into pressure and shear estimates, which are critical diagnostic parameters.
Rozhin Derakhshandeh, Brett A. Meyers, Sayantan Bhattacharya, Pavlos Vlachos   +3 more
openaire   +2 more sources

Managing TRAP Sequence Conservatively: A Case Report of Full‐Term Pregnancy With Favorable Outcome

Clinical Case Reports, Volume 14, Issue 8, August 2026.
ABSTRACT Acardiac twinning, also known as Twin reversed arterial perfusion (TRAP) sequence, is a rare anomaly seen exclusively in monochorionic twin pregnancies. It occurs due to abnormal placental vascular anastomoses, allowing retrograde perfusion from healthy “pump” twin to severely malformed twin lacking a functional heart.
Bishal Khaniya, Ayush Shrestha, Anish Sah, Rita Adhikari, Sujata Bhandari, Aashish Bhandari, Ram Aryal, Sameep Sapkota, Puspa Raj Bham, Madhur Bhattarai   +9 more
wiley   +1 more source

Characterization of extrusion flow using particle image velocimetry

eXPRESS Polymer Letters, 2009
The aim of this study was the characterization of polymer flows within an extrusion die using particle image velocimetry (PIV) in very constraining conditions (high temperature, pressure and velocity).
doaj   +1 more source

Magnetohydrodynamic velocity profile measurement for microelectromechanical systems micro-robot design

International Journal of Advanced Robotic Systems, 2019
The development of microelectromechanical systems based on magnetohydrodynamic for micro-robot applications requires precise control of the micro-flow behavior. The micro-flow channel design and its performance under the influence of the Lorentz force is
Wendy Flores-Fuentes, Mónica Valenzuela-Delgado, Danilo Cáceres-Hernández, Oleg Sergiyenko, Miguel E Bravo-Zanoguera, Julio C Rodríguez-Quiñonez, Daniel Hernández-Balbuena, Moisés Rivas-López   +7 more
doaj   +1 more source

Thromboinflammatory biomarkers in obstetric pathophysiology: Predictive insights into placental insufficiency and feto‐maternal adverse outcomes

Clinical and Translational Discovery, Volume 6, Issue 4, August 2026.
Placental insufficiency is a thromboinflammatory disorder driven by angiogenic imbalance, complement activation, endothelial dysfunction and coagulation dysregulation, leading to microvascular thrombosis, impaired uteroplacental perfusion and adverse maternal and fetal outcomes, including pre‐eclampsia, fetal growth restriction and stillbirth. Abstract
Emmanuel Ifeanyi Obeagu
wiley   +1 more source