Browsing by Subject "Fluctuations"
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Article
The effect of the phase of transmission on contrast agent echoes
(1998)Ultrasound contrast agents consist of a gas bubble, encapsulated by a shell for stabilization. The shell dampens the fluctuations in the bubble radius when insonified. The detection of contrast microbubbles during a medical ...
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Conference Object
General non-stationary models for short-term and long-term fading channels
(Institute of Electrical and Electronics Engineers Inc., 2000)This paper discusses the use of stochastic differential equations to model signal envelope variations over large areas, which are subject to long-term fading effects from the transmitter to local areas, followed by short-term ...
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Article
Three-Dimensional Modelling of Concentration Fluctuations in Complicated Geometry
(2001)The strong fluctuating component in the measured concentration time series of a dispersing gaseous pollutant in the atmospheric boundary layer, and the hazard level associated to short-term concentration levels, demonstrate ...