Results 121 to 130 of about 29,184,853 (263)

Anorectal Dysfunction in Systemic Sclerosis: Clinical Phenotypes and Functional Patterns

open access: yesArthritis Care &Research, EarlyView.
Objective The aim of this study was to characterize specific physiologic defects in anorectal dysfunction in systemic sclerosis (SSc) using anorectal manometry (ARM), evaluate associations with gastrointestinal (GI) and extraintestinal clinical phenotypes, and explore potential serologic markers for risk stratification.
Timothy Kaniecki   +6 more
wiley   +1 more source

Controller parameter optimization of LCL-type grid-connected inverters for passivity margin enhancement

open access: yesInternational Journal of Electrical Power & Energy Systems
The conventional passivity-based controller design of LCL-type grid-connected inverters can ensure the stability of the inverter-grid system, but cannot guarantee sufficient stability margin.
Linguo Liu   +4 more
doaj   +1 more source

What Do Large Language Models Know About Materials?

open access: yesAdvanced Engineering Materials, EarlyView.
If large language models (LLMs) are to be used inside the material discovery and engineering process, they must be benchmarked for the accurateness of intrinsic material knowledge. The current work introduces 1) a reasoning process through the processing–structure–property–performance chain and 2) a tool for benchmarking knowledge of LLMs concerning ...
Adrian Ehrenhofer   +2 more
wiley   +1 more source

Passivity-Based Control of Spatially-Discretized Port-Hamiltonian Systems

open access: yes, 2010
The main contribution of this paper is a procedure for the passivity-based control of high-order port-Hamiltonian systems obtained from the spatial discretization of infinite dimensional dynamics.
MELCHIORRI, CLAUDIO   +3 more
core   +1 more source

Passivity-based control of implicit port-Hamiltonian systems

open access: yes, 2013
The main contribution of this paper is the generalisation of well-known energy-based control techniques (i.e., energy-balancing passivity-based control and passivity-based control with state modulated source), to the case in which the plant is a port ...
MACCHELLI, ALESSANDRO
core   +2 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

A Passivity-based Decomposing Method for Operational Space Control of Kinematical Redundant Tele-operation Systems

open access: yes, 2021
In the passivity-based decomposing method, a bilateral tele-operation system is virtually decomposed into 2 sub-systems (shape/locked) to ensure coordination between the master and slave robots and to provide a general referenced motion of the closed ...
Cetin, Kamil, Tatlicioglu, Enver
core  

Enhanced MMC-HVDC Power Control via Adaptive VSG-PBC in Weak Grid Environments

open access: yesEnergies
This paper addresses the challenge of poor dynamic performance in Modular Multilevel Converter-based High-Voltage Direct Current (MMC-HVDC) systems within weak power grids when conventional control strategies are applied. To enhance system performance, a
Yan Xia   +5 more
doaj   +1 more source

Modular Critical Element Recycling Platform Using a Nanoporous Additively Manufactured Gyroid

open access: yesAdvanced Engineering Materials, EarlyView.
A modular recycling platform integrates 3D‐printed nanoporous gyroid structures to enable efficient critical element recovery. This system utilizes a hierarchical architecture, combining macroscopic channels with polymerization‐induced nanoscale porosity. By systematically tuning structural wall thickness and resin formulation, the platform achieves an
Xiangyu Gao   +6 more
wiley   +1 more source

Passivity-Based Control for a Micro Air Vehicle Using Unit Quaternions

open access: yes, 2016
In this paper the development and practical implementation of a Passivity-Based Control (PBC) algorithm to stabilize an Unmanned Aerial Vehicle (UAV) described with unit quaternions are presented.
Lozano, Rogelio   +24 more
core   +1 more source

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