Academic literature on the topic 'On/off valve'

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Journal articles on the topic "On/off valve"

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Schreiber, Christian, and Rüdiger Lange. "Off-pump pulmonary valve implantation." Journal of Thoracic and Cardiovascular Surgery 132, no. 4 (2006): 990. http://dx.doi.org/10.1016/j.jtcvs.2006.06.024.

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Amin, Zahid. "Off-pump pulmonary valve placement." Journal of Thoracic and Cardiovascular Surgery 132, no. 5 (2006): 1245–46. http://dx.doi.org/10.1016/j.jtcvs.2006.06.038.

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Heightman, A. J. "A Critical Shut-Off Valve." JEMS: Journal of Emergency Medical Services 33, no. 8 (2008): 20. http://dx.doi.org/10.1016/s0197-2510(08)70276-6.

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Ustunsoy, Hasim, Mehmet Adnan Celkan, Oktay Burma, Hakkı Kazaz, and Osman Baspinar. "Off-Pump Pulmonary Valve Implantation." Journal of Cardiac Surgery 23, no. 5 (2008): 464–67. http://dx.doi.org/10.1111/j.1540-8191.2008.00598.x.

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Ma, Liang, Piergiorgio Tozzi, Christoph H. Huber, Steven Taub, Gabrielle Gerelle, and Ludwig K. von Segesser. "Double-crowned valved stents for off-pump mitral valve replacement☆." European Journal of Cardio-Thoracic Surgery 28, no. 2 (2005): 194–98. http://dx.doi.org/10.1016/j.ejcts.2004.12.068.

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Olsthoorn, Jules R., Samuel Heuts, Jean Daemen, Jos Maessen, and Peyman Sardari Nia. "Transapical off-pump mitral valve repair." ASVIDE 6 (June 2019): 180. http://dx.doi.org/10.21037/asvide.2019.180.

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Ivanov, V. V., A. V. Oleinikov, D. S. Denisevich, and B. G. Pektimirov. "Emergency Shut-Off Valve for Pipelines." Chemical and Petroleum Engineering 49, no. 5-6 (2013): 400–402. http://dx.doi.org/10.1007/s10556-013-9763-z.

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Lutter, Georg, René Quaden, Satoru Osaki, et al. "Off-pump transapical mitral valve replacement☆." European Journal of Cardio-Thoracic Surgery 36, no. 1 (2009): 124–28. http://dx.doi.org/10.1016/j.ejcts.2009.02.037.

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Walther, Thomas, Jörg Kempfert, Michael A. Borger, et al. "Human Minimally Invasive Off-Pump Valve-in-a-Valve Implantation." Annals of Thoracic Surgery 85, no. 3 (2008): 1072–73. http://dx.doi.org/10.1016/j.athoracsur.2007.12.040.

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Siivonen, Lauri, Matti Linjama, Mikko Huova, and Matti Vilenius. "Jammed on/off Valve Fault Compensation with Distributed Digital Valve System." International Journal of Fluid Power 10, no. 2 (2009): 73–82. http://dx.doi.org/10.1080/14399776.2009.10780979.

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Dissertations / Theses on the topic "On/off valve"

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Katz, Allan A. "Design of a high speed hydraulic On/Off valve." Worcester, Mass. Worcester Polytechnic Institute, 2009. http://www.wpi.edu/Pubs/ETD/Available/etd-052909-155248/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Keywords: high speed hydraulic valve; switch-mode control; On/Off valve; phase controlled duty ratio. Includes bibliographical references (leaf 80-81).
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Håkansson, Klas, and Mikael Johansson. "Modeling and Control of an Electro-Pneumatic Actuator System Using On/Off Valves." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8754.

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<p>To control the exhaust gas recirculation (EGR) and the exhaust brake, the position of a butterfly valve connected to a piston inside a pneumatic cylinder is controlled by altering the pressure inside the cylinder. This thesis evaluates the possibility to do this with pulse width modulation (PWM) controlled On/Off valves. The whole electro-pneumatic actuator system is built out of two On/Off valves and a cylinder.</p><p>A mathematical model of the system is constructed. The complete system model on state space form consists of nine states and is nonlinear. The model captures the dynamics of
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Garrity, Jordan, Farid Breidi, and John Lumkes. "Design of a High Performance Energy Coupling Actuated Valve (ECAV)." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200732.

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Most commercially available valves are able to produce a large flow rate or a fast response, but are incapable of producing both simultaneously. Commercially available valves that can achieve both are expensive as they require multiple stages of actuation and piloting pressures to deliver large flow rates quickly, preventing them from being broadly used in fluid power applications. This work investigates the design of an Energy Coupling Actuated Valve (ECAV) that is capable of solving this trade-off between large flow and fast switching times through the use of an innovative, high performance
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Nyawo, Talent. "Design of a rotary valve for pressurised steam." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192859.

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Denna rapport är gjord på ett examensarbete som var utfört på uppdrag av det svenska företaget Ranotor AB. Syftet var att utveckla en konceptuell lösning för en rotationsventil som skall fungera i en miljö med hög temperatur och högt tryck. Ventilen skall arbeta under höga rotationshastigheter, vilket kräver korta öppettider.Tekniska hjälpmedel såsom SolidWorks, ANSYS och MATLAB användes för att modellera och analysera de konceptuella lösningarna. Slutlösningen valdes från ett flertal olika koncept, varpå detta vidareutvecklades och optimerades. Betydande material och gastätningslösningar iden
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Eriksson, Mikael, and Daniel Olovsson. "An Alternative Variable Valve Timing System for Heavy Duty Vehicles." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60153.

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The ability to control engine valve timing has the potential to alter the engine performance over the entire operating range. The outcome of valve timing technology enables the possibility to increase efficiency, lowering emissions, increase engine torque, etc. One of the simplest ways to obtain a variable valve timing is to use cam phasers. The dynamics of a hydraulic cam phaser has been studied, three concepts with the purpose to control such an element has been developed using simulation driven product development. Focus have been on robustness, simplicity and implementation. A final concep
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Bekele, Teshale, Rafael Åman, and Heikki Handroos. "The Control of Multiple Actuators using Single IEHEC Pump/Motor." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-199409.

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The awareness and concern of our environment together with legislation have set more and more tightening demands for energy efficiency of non-road mobile machinery(NRMM). Integrated electro- hydraulic energy converter (IEHEC) has been developed in Lappeenranta University of Technology (LUT) /1/. The elimination of resistance flow, and the recuperation of energy makes it very efficient alternative. The difficulties of IEHEC machine to step to the market has been the requirement of one IEHEC machine per one actuator. The idea is to switch IEHEC between two actuators of log crane using fast on/of
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ALLMÉR, KATARINA, and SOFIA FEYCHTING. "Off-Peak Deliveries from a Business Model Perspective." Thesis, KTH, Industriell Management, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191287.

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With an increasing urban population around the world, the need for urban freight distribution is constantly growing. Many cities face problems with traffic congestion, especially during eak hours in the morning and afternoon. At the same time, the roads are often nearly empty during nighttime. In some cities, like Stockholm, heavy haulage is not permitted to enter the city during the night. This means that carriers are forced to perform these deliveries during the day, which leads to inefficient distribution. To investigate the possibilities to use nighttime hours for deliveries, which could l
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Steinsland, Vidar. "Modeling and Control of Retarder using On/Off Solenoid Valves." Thesis, KTH, Reglerteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105880.

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The Retarder is one of the main components in Scania's trucks' braking system and is used to brake down the truck and for maintaining a steady speed on descents. This Master's Thesis aims to investigate if the current system which uses a proportional valve to control the air pressure in the Retarder, can be replaced with two on/o® solenoid valves and a pressure chamber to control the air pressure, which would result in a cheaper and more robust system. By varying the air pressure, the braking torque in the truck can be regulated. A model including electrical drives from a control unit, valves,
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Ulrich, David F. "Winning Off The Field: The Determinants of MLB Franchise Value." Scholarship @ Claremont, 2011. http://scholarship.claremont.edu/cmc_theses/292.

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This paper examines the underlying drivers of MLB franchise value. Using panel data for MLB teams from 2000-2010, I find that a team’s ballpark and metro-area market are significant determinants, yet revenues truly drive value. Further, I find that incremental increases in winning percentage by a particular team has an insignificant effect on total revenues and has no marginal impact on the value of the team, particularly if the team recognizes consistent revenue streams every year. Finally, I show that the modern sabermetric approach to player management negatively impacts firm value, sugge
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Valle, Rios Laura Elisa [Verfasser]. "Structural trends in off-stoichiometric kesterite type compound Cu2ZnSnSe4 semiconductor / Laura Elisa Valle Rios." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1130656713/34.

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Books on the topic "On/off valve"

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Mizik, Natalie. Trading off value creation and value appropriation: The financial implications of shifts in strategic emphasis. Marketing Science Institute, 2002.

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Vollmar, Jens. Spin-offs, Diversifikation und Shareholder Value. Springer Fachmedien Wiesbaden, 2014. http://dx.doi.org/10.1007/978-3-658-06559-1.

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Office, National Audit. HM Customs and Excise: Writing off VAT arrears : report. HMSO, 1995.

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Arjani, Neville. Examining the trade-off between settlement delay and intraday liquidity in Canada's LVTS: A simulation approach. Bank of Canada, 2006.

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Arjani, Neville. Examining the trade-off between settlement delay and intraday liquidity in Canada's LVTS: A simulation approach. Bank of Canada, 2006.

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Arjani, Neville. Examining the trade-off between settlement delay and intraday liquidity in Canada's LVTS: A simulation approach. Bank of Canada, 2006.

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Gullison, Ted. Logging off: Mechanisms to stop or prevent industrial logging in forests of high conservation value. Union of Concerned Scientists, 2001.

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Brainard, William C. Fundamental value and market value. National Bureau of Economic Research, 1990.

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Edleson, Michael E. Value Averaging. John Wiley & Sons, Ltd., 2006.

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Paine, Lynn Sharp. Value Shift. McGraw-Hill, 2009.

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Book chapters on the topic "On/off valve"

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Shimooka, So, Shujiro Dohta, Tetsuya Akagi, and Yoshinori Moriwake. "Analysis and Simulation of Small-Sized Quasi-servo Valve Using Tiny On/Off Control Valve." In Lecture Notes in Electrical Engineering. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17314-6_8.

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Fuhao, Ye, Chen Huiyan, Tao Gang, and Liu Yuwei. "Bi-state Modulation for High Speed On/Off Solenoid Valve." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25905-0_16.

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Karar, Mohamed Esmail, Matthias John, David Holzhey, Volkmar Falk, Friedrich-Wilhelm Mohr, and Oliver Burgert. "Model-Updated Image-Guided Minimally Invasive Off-Pump Transcatheter Aortic Valve Implantation." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23623-5_35.

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Spindler, Jacob, Rico Schulze, Kevin Schleifer, and Hendrik Richter. "EDA-Based Optimization of Blow-Off Valve Positions for Centrifugal Compressor Systems." In Applications of Evolutionary Computation. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-72699-7_28.

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Töpfer, Georg, Adrian Troeger, Justus Himstedt, and Stefan Steichele. "Variable valve actuation as an efficient measure for Off-Highway (OHW) drive systems." In Proceedings. Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-30500-0_9.

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Li, Feng P., Martin Rajchl, James A. White, Aashish Goela, and Terry M. Peters. "Towards CT Enhanced Ultrasound Guidance for Off-pump Beating Heart Mitral Valve Repair." In Augmented Reality Environments for Medical Imaging and Computer-Assisted Interventions. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40843-4_15.

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Chen, Yong, Shuangquan Liu, Shuqin Xiao, and Yuefei Ren. "Development of Emergent Shut-off Valve at Gas Wellhead in Sulige Gas Field." In Springer Series in Geomechanics and Geoengineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7560-5_101.

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Eichenberg, Andreas. "Methodology for the development of variable valve drive systems from concept to series approval with focus on heavy-duty engines." In Heavy-Duty-, On- und Off-Highway-Motoren 2017. Springer Fachmedien Wiesbaden, 2018. http://dx.doi.org/10.1007/978-3-658-21029-8_13.

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Vollmar, Jens. "Propädeutische Überlegungen zum Spin-off-Erfolg." In Spin-offs, Diversifikation und Shareholder Value. Springer Fachmedien Wiesbaden, 2014. http://dx.doi.org/10.1007/978-3-658-06559-1_2.

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Vollmar, Jens. "Spin-off-Erfolg: Beurteilung, Messung und Potenzial." In Spin-offs, Diversifikation und Shareholder Value. Springer Fachmedien Wiesbaden, 2014. http://dx.doi.org/10.1007/978-3-658-06559-1_3.

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Conference papers on the topic "On/off valve"

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Tu, Haink C., Michael B. Rannow, James D. Van de Ven, Meng Wang, Perry Y. Li, and Thomas R. Chase. "High Speed Rotary Pulse Width Modulated On/Off Valve." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42559.

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A key enabling technology to effective on/off valve based control of hydraulic systems is the high speed on/off valve. High speed valves improve system efficiency for a given PWM frequency, offer faster control bandwidth, and produce smaller output pressure ripples. Current valves rely on the linear translation of a spool or poppet to meter flow. The valve spool must reverse direction twice per PWM cycle. This constant acceleration and deceleration of the spool requires a power input proportional to the PWM frequency cubed. As a result, current linear valves are severely limited in their switc
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Cui, P., R. T. Burton, and P. R. Ukrainetz. "Development of a High Speed On/Off Valve." In International Off-Highway & Powerplant Congress & Exposition. SAE International, 1991. http://dx.doi.org/10.4271/911815.

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Katz, Allan A., and James D. Van de Ven. "Design of a High-Speed On-Off Valve." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11189.

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On-off control of hydraulic circuits enables significant improvements in efficiency compared with throttling valve control. A key enabling technology to on-off control is an efficient high-speed on-off valve. This paper documents the design of an on-off hydraulic valve that minimizes input power requirements and increases operating frequency over existing technology by utilizing a continuously rotating valve design. This is accomplished through use of spinning port discs, which divides the flow into pulses, with the relative phase between these discs determining the pulse duration. A mathemati
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McLeod, A. Jonathan, John Moore, Gerard M. Guiraudon, Doug L. Jones, Gordon Campbell, and Terry M. Peters. "Surgical phantom for off-pump mitral valve replacement." In SPIE Medical Imaging, edited by Kenneth H. Wong and David R. Holmes III. SPIE, 2011. http://dx.doi.org/10.1117/12.877724.

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Paloniitty, Miika, and Matti Linjama. "A Miniature On/Off Valve Concept for High Performance Water Hydraulics." In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4254.

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Digital hydraulic control valve technology has shown its strengths in providing reliable, leak-tight and high performance valve control regardless of the pressure medium used, oil or water. This is enabled by the intelligent use of robust on/off seat valves. However, the availability of these valves for water hydraulics is limited, especially that of compact valves, which are needed for digital valve systems. Thus, with the aim to create a compact digital water hydraulic valve system, this paper presents the development process of a water hydraulic miniature valve. The starting point for the d
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Book, Ruth, and Carroll E. Goering. "Programmable Electrohydraulic Valve." In International Off-Highway & Powerplant Congress & Exposition. SAE International, 1999. http://dx.doi.org/10.4271/1999-01-2852.

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Avsec, Jurij, and Milan Marčič. "Valve Gear Refinement." In International Off-Highway & Powerplant Congress & Exposition. SAE International, 1998. http://dx.doi.org/10.4271/982046.

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Rannow, Michael B., and Perry Y. Li. "On/Off Valve Based Position Control of a Hydraulic Cylinder." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42590.

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A method of precisely controlling the position of a hydraulic actuator using an on/off valve is developed. Since valves exhibit little power loss when they are fully open or fully closed, the proposed system is more efficient than throttling valve control and can achieve flow variation without the expense or bulk of a variable displacement pump. Mating a pulse-width-modulated (PWMed) on/off valve with a fixed displacement pump and a smoothing accumulator creates a software enabled variable displacement pump. A drawback of using digital valve control for hydraulic systems is that the relatively
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Li, Feng P., Martin Rajchl, John Moore, and Terry M. Peters. "Ultrasound based mitral valve annulus tracking for off-pump beating heart mitral valve repair." In SPIE Medical Imaging, edited by Ziv R. Yaniv and David R. Holmes. SPIE, 2014. http://dx.doi.org/10.1117/12.2043562.

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Tu, Haink C., Michael B. Rannow, Meng Wang, Perry Y. Li, and Thomas R. Chase. "Modeling and Validation of a High Speed Rotary PWM On/Off Valve." In ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2763.

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Efficient high-speed on/off valves are a critical technology for enabling digital control of hydraulic systems via pulse-width-modulation (PWM). High-speed valves, when used in virtually variable displacement pumps (VVDP), increase system bandwidth and reduce output pressure ripple by enabling higher PWM frequencies. Our approach to achieving high speed and large flow area with low actuation power is a unidirectional rotary valve designed specifically for PWM. In comparison to conventional valves, the rotary valve reduces valve actuation power from a cubic dependence on PWM frequency to a squa
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Reports on the topic "On/off valve"

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Volk, J., and H. Rostamian. A solenoid shut off valve specification for flammable gas systems. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/5041950.

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Saul, WVenner. Reverse Initiation of the Reynolds RP-87 Detonator Resulting from Off-Normal Functioning of the Ultrafast Closure Valve System. Office of Scientific and Technical Information (OSTI), 2019. http://dx.doi.org/10.2172/1574172.

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Leedy, R. R., A. R. Ellis, D. P. Hoffmann, and G. C. Marsh. Valve studies: Hydrogen fluoride monitoring of UF{sub 6} cylinder valves. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/369673.

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Lacey, P. I., S. M. Hsu, R. S. Gates, et al. Wear mechanisms of valves and valve seat inserts in a gas-fired reciprocating engine. National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.90-4264.

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Clark, R. L. Effects of aging and service wear on main steam isolation valves and valve operators. Office of Scientific and Technical Information (OSTI), 1996. http://dx.doi.org/10.2172/204274.

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Zhao, Xueshan, Kaibo Sun, Siwei Bi, and Zhong Wu. A systematic review and meta-analysis of aortic valve repair for bicuspid versus tricuspid aortic valves. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2020. http://dx.doi.org/10.37766/inplasy2020.12.0079.

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Meadows, J. B., G. E. Robbins, and D. G. Roselius. Large scale steam valve test: Performance testing of large butterfly valves and full scale high flowrate steam testing. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/188883.

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Gotoh, Takashi, Yoichi Takashima, Takuo Mizuno, Masami Wakita, and Keiji Hasegawa. Valve Train Dynamic Analysis and Digital Data Based Manufacturing of the Valve Spring. SAE International, 2005. http://dx.doi.org/10.4271/2005-32-0046.

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Prinz, F. B., and J. H. Chern. Automatic monitoring of valve status. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/10197032.

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Prinz, F. B., and J. H. Chern. Automatic monitoring of valve status. Office of Scientific and Technical Information (OSTI), 1988. http://dx.doi.org/10.2172/10197033.

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