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Since Self-Organised Criticality (SOC) was introduced in the 1987 both the nature of the self-organisation and of the criticality remains controversial. Recent observations on rain precipitation and on brain activity suggest that real…

统计力学 · 物理学 2017-06-02 Lorenzo Palmieri , Henrik Jeldtoft Jensen

We turn the stochastic critical forest-fire model introduced by Drossel and Schwabl (PRL 69, 1629, 1992) into a deterministic threshold model. This new model has many features in common with sandpile and earthquake models of Self-Organized…

统计力学 · 物理学 2009-10-31 Proshun Sinha-Ray , Henrik Jeldtoft Jensen

We investigate the scaling behavior of the cluster size distribution in the Drossel-Schwabl Forest Fire model (DS-FFM) by means of large scale numerical simulations, partly on (massively) parallel machines. It turns out that simple scaling…

统计力学 · 物理学 2009-11-07 Gunnar Pruessner , Henrik Jeldtoft Jensen

We consider a forest-fire model which, somewhat informally, is described as follows: Each site (vertex) of the square lattice is either vacant or occupied by a tree.Vacant sites become occupied at rate 1. Further, each site is hit by…

概率论 · 数学 2007-05-23 J. van den Berg , R. Brouwer

We include immunity against fire as a new parameter into the self-organized critical forest-fire model. When the immunity assumes a critical value, clusters of burnt trees are identical to percolation clusters of random bond percolation. As…

凝聚态物理 · 物理学 2009-10-22 Barbara Drossel , Siegfried Clar , Franz Schwabl

We review the properties of the self-organized critical (SOC) forest-fire model. The paradigm of self-organized criticality refers to the tendency of certain large dissipative systems to drive themselves into a critical state independent of…

统计力学 · 物理学 2016-08-31 Siegfried Clar , Barbara Drossel , Franz Schwabl

We discuss the scaling behavior of the self-organized critical forest-fire model on large length scales. As indicated in earlier publications, the forest-fire model does not show conventional critical scaling, but has two qualitatively…

统计力学 · 物理学 2009-11-07 Klaus Schenk , Barbara Drossel , Franz Schwabl

Amongst the numerous models introduced with SOC, the Forest Fire Model (FFM) is particularly attractive for its close relationship to stochastic spreading, which is central to the study of systems as diverse as epidemics, rumours, or…

统计力学 · 物理学 2020-05-14 Lorenzo Palmieri , Henrik Jeldtoft Jensen

Depending on the rule for tree growth, the forest-fire model shows either self-organized criticality with rule-dependent exponents, or synchronization, or an intermediate behavior. This is shown analytically for the one-dimensional system,…

凝聚态物理 · 物理学 2009-10-28 Barbara Drossel

We investigate a forest-fire model with the density of empty sites as control parameter. The model exhibits three phases, separated by one first-order phase transition and one 'mixed' phase transition which shows critical behavior on only…

统计力学 · 物理学 2009-10-30 Siegfried Clar , Klaus Schenk , Franz Schwabl

Forest fire spreading is a complex phenomenon characterized by a stochastic behavior. Nowadays, the enormous quantity of georeferenced data and the availability of powerful techniques for their analysis can provide a very careful picture of…

种群与进化 · 定量生物学 2023-09-06 Roberto Beneduci , Giovanni Mascali

We introduce a novel approach to study the critical behavior of equilibrium and non-equilibrium systems which is based on the concept of an instantaneous correlation length. We analyze in detail two classical statistical mechanical systems:…

统计力学 · 物理学 2020-03-04 Lorenzo Palmieri , Henrik Jeldtoft Jensen

We present the analytic solution of the self-organized critical (SOC) forest-fire model in one dimension proving SOC in systems without conservation laws by analytic means. Under the condition that the system is in the steady state and very…

凝聚态物理 · 物理学 2009-10-22 Barbara Drossel , Siegfried Clar , Franz Schwabl

Since Self-Organised Criticality (SOC) was introduced in 1987, both the nature of the self-organisation and the criticality remains controversial. Recent observations on rain precipitation and brain activity suggest that real systems…

统计力学 · 物理学 2018-08-29 Lorenzo Palmieri , Henrik Jeldtoft Jensen

The Drossel-Schwabl model of forest fires can be interpreted in a coarse grained sense as a model for the stress distribution in a single planar fault. Fires in the model are then translated to earthquakes. I show that when a second class…

统计力学 · 物理学 2015-06-15 E. A. Jagla

Prescribed burns have been increasingly utilized in forest management in the past few decades. However, their effectiveness in reducing the risk of destructive wildfires has been debated. The sandpile model of self-organized criticality,…

应用统计 · 统计学 2022-02-23 Joshua E. Gang , Wanqi Jia , Ira A. Herniter

Determining subgroups that respond especially well (or poorly) to specific interventions (medical or policy) requires new supervised learning methods tailored specifically for causal inference. Bayesian Causal Forest (BCF) is a recent…

机器学习 · 统计学 2022-09-16 Nikolay Krantsevich , Jingyu He , P. Richard Hahn

In this paper we use a variant of the Watts-Strogatz small-world model to predict wildfire behavior near the critical propagation/nonpropagation threshold. We find that forest fire patterns are fractal and that critical exponents are…

物理与社会 · 物理学 2008-05-23 Porterie Bernard , Kaiss Ahmed , Clerc Jean Pierre , Zekri Nouredine , Lotfi Zekri

The objective of the present study is twofold. First, the last developments and validation results of a hybrid model designed to simulate fire patterns in heterogeneous landscapes are presented. The model combines the features of a…

大气与海洋物理 · 物理学 2016-02-08 Mohamed Drissi

We modify the rules of the self-organized critical forest-fire model in one dimension by allowing the fire to jump over holes of $\le k$ sites. An analytic calculation shows that not only the size distribution of forest clusters but also…

凝聚态物理 · 物理学 2015-06-25 Barbara Drossel , Siegfried Clar , Franz Schwabl
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