External drivers of BOLD signal’s non-stationarity [PDF]
PLoS ONE, 2022 A fundamental challenge in neuroscience is to uncover the principles governing how the brain interacts with the external environment. However, assumptions about external stimuli fundamentally constrain current computational models. We show in silico that
Arian Ashourvan +5 more
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Quantifying Non-Stationarity with Information Theory [PDF]
Entropy, 2021 We introduce an index based on information theory to quantify the stationarity of a stochastic process. The index compares on the one hand the information contained in the increment at the time scale τ of the process at time t with, on the other hand ...
Carlos Granero-Belinchón +2 more
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Non-stationarity in the "resting brain's" modular architecture. [PDF]
PLoS ONE, 2012 Task-free functional magnetic resonance imaging (TF-fMRI) has great potential for advancing the understanding and treatment of neurologic illness. However, as with all measures of neural activity, variability is a hallmark of intrinsic connectivity ...
David T Jones +12 more
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Non-Stationarity in Multisensory Neurons in the Superior Colliculus [PDF]
Frontiers in Psychology, 2011 The superior colliculus (SC) integrates information from multiple sensory modalities to facilitate the detection and localization of salient events. The efficacy of multisensory integration is traditionally measured by comparing the magnitude of the ...
Thomas J Perrault +2 more
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Correcting for Non-stationarity in BOLD-fMRI Connectivity Analyses [PDF]
Frontiers in Neuroscience, 2021 In this work fMRI BOLD datasets are shown to contain slice-dependent non-stationarities. A model containing slice-dependent, non-stationary signal power is proposed to address time-varying signal power during BOLD data acquisition.
Catherine E. Davey +4 more
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The influence of non-stationarity of spike signals on decoding performance in intracortical brain-computer interface: a simulation study [PDF]
Frontiers in Computational Neuroscience, 2023 IntroductionIntracortical Brain-Computer Interfaces (iBCI) establish a new pathway to restore motor functions in individuals with paralysis by interfacing directly with the brain to translate movement intention into action.
Zijun Wan +11 more
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Quantifying the impact of non-stationarity in reinforcement learning-based traffic signal control [PDF]
PeerJ Computer Science, 2021 In reinforcement learning (RL), dealing with non-stationarity is a challenging issue. However, some domains such as traffic optimization are inherently non-stationary. Causes for and effects of this are manifold.
Lucas N. Alegre +2 more
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Spatial and temporal non‐stationarity in long‐term population dynamics of over‐wintering birds of North America [PDF]
Ecology and Evolution, 2023 Understanding population changes across long time scales and at fine spatiotemporal resolutions is important for confronting a broad suite of conservation challenges.
Stephen J. Murphy, Marta A. Jarzyna
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Learning to Optimize under Non-Stationarity [PDF]
SSRN Electronic Journal, 2019 We introduce algorithms that achieve state-of-the-art \emph{dynamic regret} bounds for non-stationary linear stochastic bandit setting. It captures natural applications such as dynamic pricing and ads allocation in a changing environment. We show how the
Cheung, Wang Chi +2 more
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Exploring age-related changes in dynamical non-stationarity in electroencephalographic signals during early adolescence. [PDF]
PLoS ONE, 2013 Dynamics of brain signals such as electroencephalogram (EEG) can be characterized as a sequence of quasi-stable patterns. Such patterns in the brain signals can be associated with coordinated neural oscillations, which can be modeled by non-linear ...
Vasily A Vakorin +6 more
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