In this paper, a simplified formulation for compositional reservoir simulator is presented. These types of simulators are used when inter-phase mass transfer depends on phase composition as well as pressure. The procedure for solving compositional model equations is completely described. For equilibrium calculation, property estimation Peng Robinson equation of state is used. This equation ...

Correct estimation of water inflow into underground excavations can decrease safety risks and associated costs. Researchers have proposed different methods to asses this value. It has been proved that water transmissivity of a rock joint is a function of factors, such as normal stress, joint roughness and its size and water pressure therefore, a laboratory setup was proposed to quantitatively m...

In this work a blood pressure and heart rate variability estimation system is presented. Instead of merely using beat-to-beat time interval extracted from the electrocardiogram (ECG), it is also used finger photoplethysmography (PPG) and ballistocardiography (BCG) information to have three independent estimates of the heart rate variability. Since pulse arrival and transit times can be extracte...

Blood pressure (BP) is one of the most common vital signs related to cardiovascular diseases. BP traditionally measured by mercury, aneroid, or digital sphygmomanometers; however, these approaches are restrictive, inconvenient, and need a cuff be attached directly patient. Therefore, it clinically important develop an innovative system that can accurately measure without for any direct physical...