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A random walk version of Robbins' problem: small horizon (open access)

A random walk version of Robbins' problem: small horizon

This article considers an analogous problem in which the observed random variables are the steps of a symmetric random walk. Assuming continuously distributed step sizes, it describes the optimal stopping rules for the cases n = 2 and n = 3 in two versions of the problem: a "full information" version in which the actual steps of the random walk are disclosed to the decision maker; and a "partial information" version in which only the relative ranks of the positions taken by the random walk are observed. When n = 3, the optimal rule and expected rank depend on the distribution of the step sizes. The authors give sharp bounds for the optimal expected rank in the partial information version, and fairly sharp bounds in the full information version.
Date: November 17, 2018
Creator: Allaart, Pieter C. & Allen, Andrew
System: The UNT Digital Library
Modelling of Retention Factors of Analytes in Chromatography with Ternary Solvent Mobile Phases (open access)

Modelling of Retention Factors of Analytes in Chromatography with Ternary Solvent Mobile Phases

Article on the modelling of retention factors of analytes in chromatography with ternary solvent mobile phases.
Date: January 2005
Creator: Jouyban, Abolghasem; Vaez-Gharamaleki, Zahra; Matin, A. A.; Djozan, Djavanshir & Acree, William E. (William Eugene)
System: The UNT Digital Library