Szejka, Agnes ; Mihaljev, Tamara ; Drossel, Barbara (2008)
The phase diagram of random threshold networks.
In: New Journal of Physics, 10 (6)
doi: 10.1088/1367-2630/10/6/063009
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Threshold networks are used as models for neural or gene regulatory networks. They show rich dynamical behaviour with a transition between a frozen phase and a chaotic phase. We investigate the phase diagram of randomly connected threshold networks with real-valued thresholds h and a fixed number of inputs per node. The nodes are updated according to the same rules as in a model of the cell-cycle network of Saccharomyces cereviseae (Li et al 2004 Proc. Natl Acad. Sci. USA 101 4781–6). Using the annealed approximation, we derive expressions for the time evolution of the proportion of nodes in the ‘on’ and ‘off’ states, and for the sensitivity λ. The results are compared with simulations of quenched networks. We find that for integer values of h the simulations show marked deviations from the annealed approximation even for large networks. This can be attributed to the particular choice of the updating rule.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2008 |
| Autor(en): | Szejka, Agnes ; Mihaljev, Tamara ; Drossel, Barbara |
| Art des Eintrags: | Bibliographie |
| Titel: | The phase diagram of random threshold networks |
| Sprache: | Englisch |
| Publikationsjahr: | 2008 |
| Ort: | London |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | New Journal of Physics |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 6 |
| Kollation: | 13 Seiten |
| DOI: | 10.1088/1367-2630/10/6/063009 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Threshold networks are used as models for neural or gene regulatory networks. They show rich dynamical behaviour with a transition between a frozen phase and a chaotic phase. We investigate the phase diagram of randomly connected threshold networks with real-valued thresholds h and a fixed number of inputs per node. The nodes are updated according to the same rules as in a model of the cell-cycle network of Saccharomyces cereviseae (Li et al 2004 Proc. Natl Acad. Sci. USA 101 4781–6). Using the annealed approximation, we derive expressions for the time evolution of the proportion of nodes in the ‘on’ and ‘off’ states, and for the sensitivity λ. The results are compared with simulations of quenched networks. We find that for integer values of h the simulations show marked deviations from the annealed approximation even for large networks. This can be attributed to the particular choice of the updating rule. |
| ID-Nummer: | Artikel-ID: 063009 |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) > Statistische Physik und komplexe Systeme |
| Hinterlegungsdatum: | 12 Dez 2010 10:06 |
| Letzte Änderung: | 07 Mär 2024 10:27 |
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The phase diagram of random threshold networks. (deposited 05 Mär 2024 10:21)
- The phase diagram of random threshold networks. (deposited 12 Dez 2010 10:06) [Gegenwärtig angezeigt]
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