Results 41 to 50 of about 3,332 (259)

Optimization of Structural Parameters and Cavitation Suppression in Control Valves Based on P-WOA [PDF]

open access: yesJournal of Applied Fluid Mechanics
A control valve is a critical component in water supply systems, controlling pressure, flow, and direction. However, cavitation, caused by low pressure in the valve cavity, disrupts flow and leads to cavitation damage, vibration, and noise, affecting ...
W. Li, S. Li, J. Hou, L. Yang, Y. Tian
doaj   +1 more source

Wearable Metamaterials with Embodied Intelligence for Programmable Control of Human Limbs Tremor

open access: yesAdvanced Intelligent Systems, EarlyView.
Resulting from alternating muscle contractions, tremors can severely limit human ability to perform everyday tasks like walking or talking, due to their disruptive nature. Medication and surgery may not always effectively address tremor control. A wearable device embodying programmable smart metamaterials with adaptable intelligence to meet the demand ...
Braion Barbosa de Moura   +2 more
wiley   +1 more source

Experimental results on air permeability of agricultural nets

open access: yesJournal of Agricultural Engineering, 2016
In order to evaluate the influence of the texture characteristics of agricultural nets on the air flow passing through them, a micro wind tunnel was designed and built in the testing and engineering laboratory of Sachim s.r.l., an Italian high-density ...
Sergio Castellano   +4 more
doaj   +1 more source

Separation and Surface Nuclei Effects in a Cavitation Susceptibility Meter [PDF]

open access: yes, 1991
This work is concerned with the effects of flow separation and surface nuclei on the operation of a fixed geometry Cavitation Susceptibility Meter (CSM) with laminar flow. Cavitation is induced under controlled conditions at the throat of a glass venturi
Acosta, A. J., d'Agostino, L.
core  

Static aeroelastic response of wing-structures accounting for in-plane cross-section deformation [PDF]

open access: yes, 2013
In this paper, the aeroelastic static response of flexible wings with arbitrary cross-section geometry via a coupled CUF-XFLR5 approach is presented. Refined structural one-dimensional (1D) models, with a variable order of expansion for the displacement ...
Carrera, Erasmo   +2 more
core   +1 more source

Phase‐Change Alloys Enable Localized Reversible Stiffening and Actuation in Steerable Eversion Tip‐Growing Robots

open access: yesAdvanced Intelligent Systems, EarlyView.
This work presents a tip‐growing eversion robot that uses phase‐changing alloys for reversible stiffening and localized actuation, achieving 43× stiffness modulation, 15× force amplification, and segmental steering. The system enables precise navigation and force delivery in constrained, tortuous pathways.
Shamsa Al Harthy   +4 more
wiley   +1 more source

Contact Force Estimation of Continuum Robots without Embedded Sensors: A Review

open access: yesAdvanced Intelligent Systems, EarlyView.
This review surveys methods for estimating contact forces in continuum robots without embedded sensors. It explains why contact force matters, classifies force patterns, and groups existing methods into three approaches based on actuation, deformation, and environment information.
An Hu, Yu Sun
wiley   +1 more source

Effect of a surface shear layer on gravity and gravity–capillary waves of permanent form [PDF]

open access: yes, 1990
Calculations are carried out of the shape of gravity and gravity–capillary waves on deep water in the presence of a thin sheet of uniform vorticity which models the effect of a wind drift layer.
Milinazzo, F. A., Saffman, P. G.
core   +1 more source

A Soft Wearable Robot for Vertical Jump Enhancement via a Pneumatic Energy‐Storing Propulsion Actuator and Triarticular Kinetic‐Chained Structure

open access: yesAdvanced Intelligent Systems, EarlyView.
The Jump‐Enhancing Textile Suit integrates the Pneumatic Energy‐Storing Propulsion Actuator (PESPA) and the Triarticular Kinetic‐Chained Structure (TKiCS). PESPA stores elastic energy under pneumatic pressure and releases it during the propulsive phase to augment movement.
Sunghun Kim   +5 more
wiley   +1 more source

Uniform Uncertainty Principle for Bernoulli and Subgaussian Ensembles

open access: yesConstructive Approximation, 2008
15 pages; no figures ...
Mendelson, Shahar   +2 more
openaire   +5 more sources

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