Results 31 to 40 of about 37,008,848 (268)

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

Simple Way To Fabricate Novel Paper-Based Valves Using Plastic Comb Binding Spines [PDF]

open access: yesACS Sensors, 2018
A novel strategy for fabricating the paper-based valves on microfluidic paper-based analytical devices (μPADs) was described to control fluid in a user-friendly way. Initial prototypes of 3D μPADs manipulate the spatial distribution of fluid within the device.
Jinglong Han   +5 more
openaire   +2 more sources

Idle Operation with Low Intake Valve Lift in a Port Fuel Injected Engine [PDF]

open access: yes, 2013
Reducing fuel consumption is a prime objective in the automotive industry in order to meet regulatory and customer demands. Variable valve actuation offers many opportunities for improving the spark ignition engine’s performance in areas such as fuel ...
CLENCI, Adrian   +12 more
core   +1 more source

Detection of diesel engine valve clearance by acoustic emission. [PDF]

open access: yes, 2009
This paper investigated, using experimental method, the suitability of acoustic emission (AE) technique for the condition monitoring of diesel engine valve faults.
Gu, Fengshou   +3 more
core   +4 more sources

Capacity Testing and Local Flow Analysis of a Geometrically Complex Trim Installed within a Commercial Control Valve [PDF]

open access: yes
Industrial control valves often handle flows with very high pressure drops (conditions often referred to as severe service). In order to cope with such pressure drops, geometrically complex valve trims with many stages of pressure drops, are designed to ...
Rakesh, Mishra   +3 more
core   +3 more sources

Local versus general anesthesia for transcatheter aortic valve implantation (TAVR)- systematic review and meta-analysis [PDF]

open access: yes, 2014
The hypothesis of this study was that local anesthesia with monitored anesthesia care (MAC) is not harmful in comparison to general anesthesia (GA) for patients undergoing Transcatheter Aortic Valve Implantation (TAVR).TAVR is a rapidly spreading ...
Webb, J   +21 more
core   +2 more sources

Microflow valve control system design [PDF]

open access: yes, 2011
A design synthesis for a microflow control system is presented based on the interrogation of an analytical model, testing, and observation. The key issues relating to controlling a microflow using a variable geometry flow channel are explored through the
Zante, Remi Christophe, Yan, Xiu
core   +4 more sources

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

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