Results 21 to 30 of about 80,855 (244)

AN APLICATION FOR THE SELECTION AND SIZING OF CONTROL VALVE FOR CONTROL LOOP [PDF]

open access: yesRomanian Journal of Petroleum & Gas Technology, 2023
The paper presents the research of the author in developing an application for sizing and selection of control valves for typical process control applications.
Cristina Popa
doaj   +1 more source

A paper-based microfluidic platform with shape-memory-polymer-actuated fluid valves for automated multi-step immunoassays [PDF]

open access: yesMicrosystems & Nanoengineering, 2019
AbstractSmart fluid manipulation with automatically controlled paper valves will enable automated and multi-step immunoassays on paper-based microfluidic devices. In this work, we present an integrated paper-based microfluidic platform with shape-memory polymer (SMP)-actuated fluid valves capable of automated colorimetric enzyme-linked immunosorbent ...
Hao Fu   +7 more
openaire   +2 more sources

Improvement of the Segment‐Valve Model for Solving the Valve Isolation Problem and Evaluating the Reliability of Water Distribution Networks

open access: yesWater Resources Research, 2023
The segment‐valve graph model is widely used in the reliable evaluation of water distribution networks (WDNs). However, as an undirected graph, a segment‐valve graph does not express the upstream‐downstream relationships between segments, which hinders ...
Zhen Hu   +6 more
doaj   +1 more source

Study on Dynamic and Static Performance of a Micro Digital Hydraulic Valve

open access: yesMicromachines, 2022
Previous researchers mostly carried out simulation research and scattered experimental research on the static and dynamic characteristics of the digital valve, but did not form a systematic and in-depth study on the characteristics of the valve. Based on
Meisheng Yang
doaj   +1 more source

The strategy of antibody-free biomarker analysis by in-situ synthesized molecularly imprinted polymers on movable valve paper-based device [PDF]

open access: yesBiosensors and Bioelectronics, 2019
In this work, we provided a novel strategy of antibody-free biomarker analysis by in-situ synthesized molecularly imprinted polymers (MIPs) on movable valve microfluidic paper-based electrochemical device (Bio-MIP-ePADs) for clinical detection of biomarkers.
Ji, Qi   +6 more
openaire   +2 more sources

Relation of Bicuspid Aortic Valve Morphology to the Dilatation Pattern of the Proximal Aorta: Focus on the Transvalvular Flow

open access: yesCardiology Research and Practice, 2012
Whether the dilatation of proximal aorta in patients with bicuspid aortic valve is secondary to hemodynamic effects related to the abnormal aortic valve or a primary manifestation of the genetic disorder remains controversial.
Evaldas Girdauskas   +3 more
doaj   +1 more source

Virtual Design and Dynamic Simulation of Valve Trains

open access: yesMATEC Web of Conferences, 2017
The valve train plays an important role in the engine, which has a great influence on engine performance and reliability. In this paper, valve trains are studied based on multi-body dynamics theory and virtual prototype technology.
Xuan Guantao, Shao Yuanyuan
doaj   +1 more source

Application of Wireless Sensor Based on Sound Localization in Safety Valve Condition Monitoring of Chemical Plant

open access: yesChemical Engineering Transactions, 2017
In recent years, accidents occurred in the chemical plant are linked to the failure of the safety valve or the excessive mechanical stress, and the reasons are mainly related to the safety of the safety valve, piping, support selection and the stress ...
Jizhao Ma, Jianqing Lu
doaj   +1 more source

Quantitative Evaluation on Valve Leakage of Reciprocating Compressor Using System Characteristic Diagnosis Method

open access: yesApplied Sciences, 2020
High impact and strong noise complicate the response of reciprocating compressor (RC). It requires a complex signal processing method that is a single response-based or excitation-based fault diagnosis method applied to RC valve leakage fault diagnosis ...
Liubang Han   +4 more
doaj   +1 more source

Optimizing the shape of the prosthetic aortic leaflet valve

open access: yesComputer Assisted Methods in Engineering and Science, 2022
The object under study reported on in this paper was an aortic valve based on a natural aortic valve as the original. Simulations were carried out to examine the functioning of a valve which was loaded with varying pressure until a buckling of the ...
Piotr Konderla, Krzysztof Patralski
doaj  

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