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A novel elastic time distance for sparse multivariate functional data is proposed and used to develop a robust distance-based two-layer partition clustering method. With this proposed distance, the new approach not only can detect correct…

统计方法学 · 统计学 2023-03-21 Zhuo Qu , Wenlin Dai , Marc G. Genton

We present high signal-to-noise measurements of the acoustic scale in the presence of nonlinear growth and redshift distortions using 320(Gpc/h)^3 of cosmological PM simulations. Using simple fitting methods, we obtain robust measurements…

天体物理学 · 物理学 2009-08-21 Hee-Jong Seo , Ethan R. Siegel , Daniel J. Eisenstein , Martin White

Motivated by the results of two-dimensional conformal field theory (CFT) we investigate the finite-size scaling of the mass spectrum of an Ising model on three-dimensional lattices with a spherical cross section. Using a cluster-update…

统计力学 · 物理学 2015-06-24 Martin Weigel , Wolfhard Janke

We study domain growth properties of two species of particles executing biased diffusion on a half-filled square lattice, consisting of just two lanes. Driven in opposite directions by an external ``electric'' field, the particles form…

统计力学 · 物理学 2009-11-07 J. T. Mettetal , B. Schmittmann , R. K. P. Zia

A simple finite-size scaling theory is proposed here for anisotropic percolation models considering the cluster size distribution function as generalized homogeneous function of the system size and two connectivity lengths. The proposed…

软凝聚态物质 · 物理学 2008-07-16 Santanu Sinha , S. B. Santra

The phase diagram of QCD at finite temperature and density and the existence of a critical point are currently very actively researched topics. Although tremendous progress has been made, in the case of two light quark flavors even the…

高能物理 - 唯象学 · 物理学 2008-11-26 Bertram Klein , Jens Braun

We review a recent asymptotic weak noise approach to the Kardar-Parisi-Zhang equation for the kinetic growth of an interface in higher dimensions. The weak noise approach provides a many body picture of a growing interface in terms of a…

统计力学 · 物理学 2009-11-13 Hans C. Fogedby

Adding sand grains at a single site in Abelian sandpile models produces beautiful but complex patterns. We study the effect of sink sites on such patterns. Sinks change the scaling of the diameter of the pattern with the number $N$ of sand…

统计力学 · 物理学 2010-10-01 Tridib Sadhu , Deepak Dhar

Stochastic Neighbor Embedding and its variants are widely used dimensionality reduction techniques -- despite their popularity, no theoretical results are known. We prove that the optimal SNE embedding of well-separated clusters from high…

机器学习 · 统计学 2017-02-24 Uri Shaham , Stefan Steinerberger

We simulate Barkhausen avalanches on fractal clusters in a two-dimensional diluted Ising ferromagnet with an effective Gaussian random field. We vary the concentration of defect sites $c$ and find a scaling region for moderate disorder,…

凝聚态物理 · 物理学 2009-10-28 Bosiljka Tadic

A new kind of delta expansion is applied on the lattice to the d=2 non-linear sigma model at N=infinity and N=1 which corresponds to the Ising model. We introduce the parameter delta for the dilation of the scaling region of the model with…

高能物理 - 格点 · 物理学 2008-11-26 Hirofumi Yamada

We present a new description of nonequilibrium square patterns as a harmonically coupled crystal lattice. In a vertically oscillating granular layer, different transverse normal modes of the granular square-lattice pattern are observed for…

斑图形成与孤子 · 物理学 2009-11-07 Daniel I. Goldman , M. D. Shattuck , Sung Joon Moon , J. B. Swift , Harry L. Swinney

With the aim of constructing a biologically plausible model of machine listening, we study the representation of a multicomponent stationary signal by a wavelet scattering network. First, we show that renormalizing second-order nodes by…

声音 · 计算机科学 2020-06-26 Vincent Lostanlen , Alice Cohen-Hadria , Juan Pablo Bello

This manuscript investigates the one-pass stochastic gradient descent (SGD) dynamics of a two-layer neural network trained on Gaussian data and labels generated by a similar, though not necessarily identical, target function. We rigorously…

机器学习 · 统计学 2023-02-14 Luca Arnaboldi , Ludovic Stephan , Florent Krzakala , Bruno Loureiro

A theoretical model for fractal growth of DLA-clusters in two- and three-dimensional Euclidean space is proposed. This model allows to study some statistical properties of growing clusters in two different situations: in the static case…

混沌动力学 · 物理学 2007-05-23 A. Loskutov , D. Andrievsky , V. Ivanov , K. Vasiliev , A. Ryabov

We report tests of finite-size scaling ansatzes in the low temperature phase of the two-dimensional Ising model. For moments of the magnetisation density, we find good agreement with the new ansatz of Borgs and Koteck\'y, and clear evi…

高能物理 - 格点 · 物理学 2011-04-15 S. Gupta , A. Irbaeck

A brief review is presented of the scaling of complex fluids, polymers and polyelectrolytes in solution and in confined geometry, in thermodynamical, structural and rheology properties using equilibrium and nonequilibrium dissipative…

软凝聚态物质 · 物理学 2016-12-06 Armando Gama Goicochea

The silhouette coefficient quantifies, for each observation, the balance between within-cluster cohesion and between-cluster separation, taking values in the range [-1,1]. The average silhouette width (ASW) is a widely used internal measure…

机器学习 · 计算机科学 2026-03-23 Hugo Sträng , Tai Dinh

The analyticity properties of the scattering amplitude for a massive scalar field is reviewed in this article where the spacetime geometry is $R^{3,1}\otimes S^1$ i.e. one spatial dimension is compact. Khuri investigated the analyticity of…

高能物理 - 理论 · 物理学 2021-02-24 Jnanadeva Maharana

The scaling behaviour of randomly branched polymers in a good solvent is studied in two to nine dimensions, using as microscopic models lattice animals and lattice trees on simple hypercubic lattices. As a stochastic sampling method we use…

统计力学 · 物理学 2009-11-10 Hsiao-Ping Hsu , Walter Nadler , Peter Grassberger