File:Replica-mean field limits of metastable dynamics.webm
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[edit]DescriptionReplica-mean field limits of metastable dynamics.webm |
English: The presentation by Thibaud Taillefumier, from the University of Texas at Austin, is part of the Pathways to the 2023 IHP thematic project Random Processes in the Brain.
In this seminar, Taillefumier propose to decipher the activity of neural networks via a “multiply and conquer” approach. This approach considers limit networks made of infinitely many replicas with the same basic neural structure. The key point is that these so-called replica-mean-field networks are in fact simplified, tractable versions of neural networks that retain important features of the finite network structure of interest. The finite size of neuronal populations and synaptic interactions is a core determinant of neural dynamics, being responsible for non-zero correlation in the spiking activity, but also for finite transition rates between metastable neural states. Theoretically, we develop our replica framework by expanding on ideas from the theory of communication networks rather than from statistical physics to establish Poissonian mean-field limits for spiking networks. Computationally, we leverage this replica approach to characterize the stationary spiking activity emerging in the replica mean-field limit via reduction to tractable functional equations. We conclude by discussing perspectives about how to predict transition rates in metastable networks from the characterization of their replica mean-field limit. You can learn more about the Pathways to the 2023 IHP thematic project Random Processes in the Brain on this link: https://rpbihp.numec.prp.usp.br/index.php/Pathways_to_the_2023_IHP_thematic_program_Random_Processes_in_the_Brain |
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Source | https://www.youtube.com/watch?v=A3OhXqpfRP8 |
Author | CEPID NeuroMat |
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[edit]This media was produced by NeuroMat and was licensed as Creative Commons BY-SA 4.0. The Research, Innovation and Dissemination Center for Neuromathematics (RIDC NeuroMat) is a Brazilian research center hosted by the University of São Paulo and funded by the São Paulo Research Foundation (FAPESP).
Attribution in English: RIDC NeuroMat Attribution in Portuguese: CEPID NeuroMat |
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current | 00:41, 1 October 2022 | 55 min 0 s, 1,280 × 720 (90.56 MB) | Thaismay (talk | contribs) | Uploaded a work by CEPID NeuroMat from https://www.youtube.com/watch?v=A3OhXqpfRP8 with UploadWizard |
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