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Pressure control for constantpressure masks
"... Abstract: This research focuses on developing an automatic control scheme to maintain a constant pressure in a mask which is normally used in respiratory devices to help patients with breathing difficulties. The problem of dead time associated with fluid flow in relatively long tubes conveying air i ..."
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Abstract: This research focuses on developing an automatic control scheme to maintain a constant pressure in a mask which is normally used in respiratory devices to help patients with breathing difficulties. The problem of dead time associated with fluid flow in relatively long tubes conveying air
Piecewise constant pressures for Darcy law
 in Finite Elements Methods:1970 and beyond L.P. Franca (Ed.) CIMNE
, 2004
"... Abstract. In this paper we present a short discussion on some finite element formulations for linear elliptic problems. For the sake of symplicity we consider the Poisson equation −∆p = f , taking the notation from Darcy's law. Among the zillions of such methods, we shall concentrate our atten ..."
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Cited by 2 (1 self)
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attention on FEM leading to a final system of linear algebraic equations M P = F where each unknown P i represents the constant value of the approximated pressure p h in a single element. It is indeed well known that for some applications there is a certain demand for these types of schemes.
Optimized constant pressure stochastic dynamics
 J. Chem. Phys
, 1999
"... A recently proposed method for computer simulations in the isothermal– isobaric (NPT) ensemble, based on Langevin–type equations of motion for the particle coordinates and the “piston ” degree of freedom, is re–derived by straightforward application of the standard Kramers–Moyal formalism. An integr ..."
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Cited by 4 (0 self)
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A recently proposed method for computer simulations in the isothermal– isobaric (NPT) ensemble, based on Langevin–type equations of motion for the particle coordinates and the “piston ” degree of freedom, is re–derived by straightforward application of the standard Kramers–Moyal formalism. An integration scheme is developed which reduces to a time–reversible symplectic integrator in the limit of vanishing friction. This algorithm is hence expected to be quite stable for small friction, allowing for a large time step. We discuss the optimal choice of parameters, and present some numerical test results.
PIECEWISE CONSTANT PRESSURE FOR DARCY LAW
"... Abstract. In this paper we present a short discussion on some finite element formulations for linear elliptic problems. For the sake of symplicity we consider the Poisson equation −∆p = f, taking the notation from Darcy’s law. Among the zillions of such methods, we shall concentrate our attention on ..."
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on FEM leading to a final system of linear algebraic equations M P = F where each unknown Pi represents the constant value of the approximated pressure ph in a single element. It is indeed well known that for some applications there is a certain demand for these types of schemes.
A Method for Objective Analysis of Stratospheric ConstantPressure
 Charts,” Monthly Weather Review
, 1965
"... A method of numerical objective analysis has been developed for application to stratospheric constantpressure data at the loo, 50, 30, and IOmb. levels (approximately 16, 20, 24, and 31 km., respectively). This system evolved from successive modifications of the programs employed for operationa ..."
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Cited by 16 (1 self)
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A method of numerical objective analysis has been developed for application to stratospheric constantpressure data at the loo, 50, 30, and IOmb. levels (approximately 16, 20, 24, and 31 km., respectively). This system evolved from successive modifications of the programs employed
ConstantPressure Measurement of SteamWater Relative Permeability
, 2001
"... A series of steadystate experiments have established relative permeability curves for twophase flow of water in a porous medium. These experiments have minimized uncertainty in pressure, heat loss, and saturation. By attempting to maintain a constant pressure gradient, the experiments have provide ..."
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Cited by 2 (0 self)
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A series of steadystate experiments have established relative permeability curves for twophase flow of water in a porous medium. These experiments have minimized uncertainty in pressure, heat loss, and saturation. By attempting to maintain a constant pressure gradient, the experiments have
ConstantPressure Measurement of Steam Water Relative Permeability
, 2001
"... A series of steadystate experiments have established relative permeability curves for twophase flow of water in a porous medium. These experiments have minimized uncertainty in pressure, heat loss, and saturation. By attempting to maintain a constant pressure gradient, the experiments have provide ..."
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A series of steadystate experiments have established relative permeability curves for twophase flow of water in a porous medium. These experiments have minimized uncertainty in pressure, heat loss, and saturation. By attempting to maintain a constant pressure gradient, the experiments have
Research of Intelligent Control of Air Compressor at Constant Pressure
"... AbstractThe air separation plays an extremely important role in the development of metallurgical industry. And the air compressor which provides not only the required pressure air for the cooling equipment and refrigeration plant but also the raw material required for the separation plant is a key ..."
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compressor system, the fuzzy control theory, as one of the modern control theories, was applied to the constant pressure control system to design a fuzzy pressure controller. The simulation results showed that the controller not only was more convenient and effective but also provided a certain directive
EVALUATION OF THE INTRAVENOUS STAT CONSTANT PRESSURE INFUSER (0
, 1989
"... When Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely Governmentrelated procurement, the United States Government incurs no responsibility or any obligation whatsoever. The fact that the Government may have formulated or in any w ..."
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When Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely Governmentrelated procurement, the United States Government incurs no responsibility or any obligation whatsoever. The fact that the Government may have formulated or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication, or otherwise in any manner construed, as licensing the holder or any other person or corporation; or as conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. The Office of Public Affairs has reviewed this report, and it is releasable to the Nationai Technical Information Service, where it will be available to the general public, including foreign natiunais.
Constant Pressure Hybrid Molecular Dynamics−Monte Carlo Simulations
, 2008
"... New hybrid Molecular DynamicsMonte Carlo methods are proposed to increase the efficiency of constantpressure simulations. Two variations of the isobaric Molecular Dynamics component of the algorithms are considered. In the first, we use the extendedensemble method of Andersen [H. C. Andersen J. C ..."
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Cited by 1 (0 self)
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New hybrid Molecular DynamicsMonte Carlo methods are proposed to increase the efficiency of constantpressure simulations. Two variations of the isobaric Molecular Dynamics component of the algorithms are considered. In the first, we use the extendedensemble method of Andersen [H. C. Andersen J
Results 1  10
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