Results 251 to 260 of about 182,267 (308)
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Reflex control of expiratory airflow and duration
Journal of Applied Physiology, 1977Unanesthetized, unrestrained cats were studied repeatedly after placement of a permanent tracheostomy, catheters for respiratory pressure measurements, and respiratory muscle EMG electrodes. The tracheostomy was opened or closed by a remote mechanism.
J E, Remmers, D, Bartlett
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The Technology of Ventilator Airflow Control
Applied Mechanics and Materials, 2013Aiming at improving and optimizing the ventilators performance and by reviewing the whole procession for design and research of a modern medical mechanical ventilator, many things about its ventilation control are taken into being considered toward the perspective of machine system in this paper.
Yue Yang Yuan +2 more
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Development of a Fan Airflow Station for Airflow Control in VAV Systems
Solar Energy, 2003A fan airflow station has been developed by the authors. This station is used to determine fan airflow using fan speed and fan head as inputs. These inputs can be measured accurately in variable air volume (VAV) systems, so they can be used as a cost-effective control monitoring method for heating, ventilation and air conditioning (HVAC) systems ...
David P. Yuill +2 more
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Density-dependent airflow and ventilatory control during exercise
Respiration Physiology, 1982The influence of respired gas density on ventilatory control during cycle-ergometer exercise was investigated in six healthy subjects. They underwent constant-load exercise for 10 min both at 50% and 90% of the anaerobic threshold, inhaling air for the first 5 min followed abruptly by 80% helium-20% oxygen (He-O2) for the remaining 5 min (and vice ...
S A, Ward, B J, Whipp, C S, Poon
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Climate chamber for environmentally controlled laboratory airflow experiments
Technology and Health Care, 2010Climate chambers have been widely used in in vitro and in vivo studies which require controlled environmental temperature and humidity conditions. This article describes a new desktop climate chamber that was developed for application of respiratory airflows on cultured nasal epithelial cells (NEC) under controlled temperature and humidity conditions ...
Nurit, Even-Tzur +6 more
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Power Generation Control of OWC Using Airflow Control
2020In this chapter, the airflow control scheme for output power control of the OWC plant is presented. The control valves are used to regulate the airflow inside the OWC chamber. Several studies have discussed the airflow control techniques in the past three decades, e.g. Falcao and Justino (1999a), Falcao et al. (2003, 2010a), Amundarain et al.
Sunil Kumar Mishra +3 more
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Numerical Research on Airflow-Controlled Swing Burners
2009 International Conference on Energy and Environment Technology, 2009A new-type burner is presented which used transverse airflow to control the air-jet angle from the burner instead of traditionally used swing burner which used mechanical components to control the installation angle of the burner. Jamming problems of traditional swing burners can be avoided. The structure and working principle of the airflow-controlled
ShuQi Wang, ShengPing Tang, Yi Su
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Optimal control of inspiratory airflow in breathing
Optimal Control Applications and Methods, 1984AbstractThis paper describes a new optimal control model for predicting the inspiratory airflow pattern in breathing. The dynamics of the mechanical lung‐rib‐cage system is described by a linear first‐order equation. The physiological interpretation of the mathematical optimization criterion used in the model is the minimization of oxygen expenditure ...
Hämäläinen, Raimo P., Sipilä, Aarne
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Dual AC motor control maintains airflow constant
IV IEEE International Power Electronics Congress. Technical Proceedings. CIEP 95, 2002Two centrifugal air blowers are controlled in order to produce a constant airflow to maintain particles in suspension. In the present application peanuts are the subject of study to evaluate the potentiality of burning them with hot air. Two squirrel cage AC motors are controlled by only one microprocessor, although their power rating and air produced ...
F. Hahn, A. Rivera, M. Vazquez Rueda
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Airflow control systems for miniature fuel cells
SPIE Proceedings, 2000The feasibility of utilizing piezoelectric actuators for air flow control of low-power fuel cells is assessed using an electromechanical model of the actuator and a steady-state model for compressible flow. Expressions for electromechanical efficiency are derived using one-dimensional transducer equations of a piezoelectric actuator coupled to the ...
Donald J. Leo, Khalil Nasser
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