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20032006
most citedNoise reduction in chaotic time series by a local projection with nonlinear constraints

15 citations · 37 across the 6 of their papers we have counts for

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Showing 2006Show all

2 papers · 1 filter

physics.data-an2006★ 5 cited

Risk evaluation with enhaced covariance matrix

Krzysztof Urbanowicz, Peter Richmond, Janusz A. Holyst

We propose a route for the evaluation of risk based on a transformation of the covariance matrix. The approach uses a `potential' or `objective' function. This allows us to rescale…

physics.med-ph2006★ 8 cited

How random is your heart beat?

K. Urbanowicz, J. J. Zebrowski, R. Baranowski +1

We measure the content of random uncorrelated noise in heart rate variability using a general method of noise level estimation using a coarse grained entropy. We show that usually…