scholarly journals Optimal Prediction of the Last-Passage Time of a Transient Diffusion

2014 ◽  
Vol 52 (6) ◽  
pp. 3833-3853 ◽  
Author(s):  
Kristoffer Glover ◽  
Hardy Hulley
Keyword(s):  
Passage Time ◽  
Optimal Prediction ◽  
Transient Diffusion ◽  
Last Passage Time

scholarly journals Last-Passage Time for Linear Diffusions and Application to the Emptying Time of a Box

2020 ◽  
Vol 181 (5) ◽  
pp. 1565-1602
Author(s):  
Alain Comtet ◽  
Françoise Cornu ◽  
Grégory Schehr
Keyword(s):  
Passage Time ◽  
Last Passage Time ◽  
Linear Diffusions ◽  
Emptying Time

scholarly journals Sparre Andersen identity and the last passage time

2016 ◽  
Vol 53 (2) ◽  
pp. 600-605 ◽  
Author(s):  
Jevgenijs Ivanovs
Keyword(s):  
Random Walks ◽  
Uniform Distribution ◽  
Lévy Processes ◽  
Passage Time ◽  
Levy Processes ◽  
Last Passage Time ◽  
Random Times

AbstractIt is shown that the celebrated result of Sparre Andersen for random walks and Lévy processes has intriguing consequences when the last time of the process in (-∞, 0], say σ, is added to the picture. In the case of no positive jumps this leads to six random times, all of which have the same distribution—the uniform distribution on [0, σ]. Surprisingly, this result does not appear in the literature, even though it is based on some classical observations concerning exchangeable increments.

scholarly journals Characterizing Transport between the Surface Mixed Layer and the Ocean Interior with a Forward and Adjoint Global Ocean Transport Model

2005 ◽  
Vol 35 (4) ◽  
pp. 545-564 ◽  
Author(s):  
François Primeau
Keyword(s):  
Time Distribution ◽  
First Passage Time ◽  
Three Dimensional ◽  
Passage Time ◽  
Distribution Functions ◽  
Global Ocean ◽  
Surface Mixed Layer ◽  
Fluid Element ◽  
Transport Operator ◽  
Last Passage Time

Abstract The theory of first-passage time distribution functions and its extension to last-passage time distribution functions are applied to the problem of tracking the movement of water masses to and from the surface mixed layer in a global ocean general circulation model. The first-passage time distribution function is used to determine in a probabilistic sense when and where a fluid element will make its first contact with the surface as a function of its position in the ocean interior. The last-passage time distribution is used to determine when and where a fluid element made its last contact with the surface. A computationally efficient method is presented for recursively computing the first few moments of the first- and last-passage time distributions by directly inverting the forward and adjoint transport operator. This approach allows integrated transport information to be obtained directly from the differential form of the transport operator without the need to perform lengthy multitracer time integration of the transport equations. The method, which relies on the stationarity of the transport operator, is applied to the time-averaged transport operator obtained from a three-dimensional global ocean simulation performed with an OGCM. With this approach, the author (i) computes surface maps showing the fraction of the total ocean volume per unit area that ventilates at each point on the surface of the ocean, (ii) partitions interior water masses based on their formation region at the surface, and (iii) computes the three-dimensional spatial distribution of the mean and standard deviation of the age distribution of water.

Last Passage Time Statistics for Barrier-Crossing Processes

2006 ◽  
Vol 123 (4) ◽  
pp. 861-869 ◽  
Author(s):  
Jing-Dong Bao ◽  
Ying Jia
Keyword(s):  
Passage Time ◽  
Barrier Crossing ◽  
Last Passage Time
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