Results 81 to 90 of about 19,510 (176)

Riemann–Liouville fractional Brownian motion with random Hurst exponent

open access: yesChaos: An Interdisciplinary Journal of Nonlinear Science
We examine two stochastic processes with random parameters, which in their basic versions (i.e., when the parameters are fixed) are Gaussian and display long-range dependence and anomalous diffusion behavior, characterized by the Hurst exponent. Our motivation comes from biological experiments, which show that the basic models are inadequate for ...
Hubert Woszczek   +2 more
openaire   +5 more sources

Evaluation of genome similarities using a wavelet-domain approach

open access: yesRevista da Sociedade Brasileira de Medicina Tropical
INTRODUCTION: Tuberculosis is listed among the top 10 causes of deaths worldwide. The resistant strains causing this disease have been considered to be responsible for public health emergencies and health security threats.
Leila Maria Ferreira   +2 more
doaj   +1 more source

Group-wise herding behavior in financial markets: an agent-based modeling approach.

open access: yesPLoS ONE, 2014
In this paper, we shed light on the dynamic characteristics of rational group behaviors and the relationship between monetary policy and economic units in the financial market by using an agent-based model (ABM), the Hurst exponent, and the Shannon ...
Minsung Kim, Minki Kim
doaj   +1 more source

Efficiently Implementing the Maximum Likelihood Estimator for Hurst Exponent [PDF]

open access: yesMathematical Problems in Engineering, 2014
This paper aims to efficiently implement the maximum likelihood estimator (MLE) for Hurst exponent, a vital parameter embedded in the process of fractional Brownian motion (FBM) or fractional Gaussian noise (FGN), via a combination of the Levinson algorithm and Cholesky decomposition.
openaire   +2 more sources

Classical and modified rescaled range analysis: Sampling properties under heavy tails [PDF]

open access: yes
Mostly used estimators of Hurst exponent for detection of long-range dependence are biased by presence of short-range dependence in the underlying time series. We present confidence intervals estimates for rescaled range and modified rescaled range.
Ladislav Kristoufek
core   +1 more source

Assessment of the state of the computer system based on the hurst exponent [PDF]

open access: yes, 2017
The method of identifying abnormal behavior of computer systems based on the Hurst exponent is examined in this report. Results of the research suggest the possibility of using the Hurst exponent for identifying the anomalous behavior of computer systems
Chelak, Viktor   +2 more
core  

Self-organization of value and demand

open access: yes, 2000
We study the dynamics of exchange value in a system composed of many interacting agents. The simple model we propose exhibits cooperative emergence and collapse of global value for individual goods.
Akgiray   +17 more
core   +1 more source

Martingales, the efficient market hypothesis, and spurious stylized facts [PDF]

open access: yes, 2007
The condition for stationary increments, not scaling, detemines long time pair autocorrelations. An incorrect assumption of stationary increments generates spurious stylized facts, fat tails and a Hurst exponent Hs=1/2, when the increments are ...
Bassler, Kevin E.   +2 more
core   +1 more source

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