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There are given characterizations of the exponential distribution by the properties of the independence of linear forms with random coefficients. Related results based on the constancy of regression of one statistic on a linear form are…

统计理论 · 数学 2019-11-27 Lev B. Klebanov , Zeev E. Vol'kovich

We study the evolution of a random graph under the constraint that the diameter remain constant as the graph grows. We show that if the graph maintains the form of its link distribution it must be scale-free with exponent between 2 and 3.…

统计力学 · 物理学 2007-05-23 Amit Puniyani , Rajan Lukose

We model certain features of human language complexity by means of advanced concepts borrowed from statistical mechanics. Using a time series approach, the diffusion entropy method (DE), we compute the complexity of an Italian corpus of…

统计力学 · 物理学 2016-11-23 Paolo Allegrini , Paolo Grigolini , Luigi Palatella

We introduce and study interval partition diffusions with Poisson--Dirichlet$(\alpha,\theta)$ stationary distribution for parameters $\alpha\in(0,1)$ and $\theta\ge 0$. This extends previous work on the cases $(\alpha,0)$ and…

概率论 · 数学 2022-07-25 Noah Forman , Douglas Rizzolo , Quan Shi , Matthias Winkel

Since the emergence of research on improving the length extrapolation capabilities of large language models in 2021, some studies have made modifications to the scaling factor in the scaled dot-product attention mechanism as part of their…

计算与语言 · 计算机科学 2025-01-28 Kewei Li , Yanwen Kong , Yiping Xu , Jianlin Su , Lan Huang , Ruochi Zhang , Fengfeng Zhou

The entropy of a random variable is well-known to equal the exponential growth rate of the volumes of its typical sets. In this paper, we show that for any log-concave random variable $X$, the sequence of the $\lfloor n\theta…

信息论 · 计算机科学 2017-02-07 Varun Jog , Venkat Anantharam

Epidemic models with inhomogeneous populations have been used to study major outbreaks and recently Britton and Lindenstrand \cite{BL} described the case when latency and infectivity have independent gamma distributions. They found that…

种群与进化 · 定量生物学 2010-12-17 C. T. J. Dodson

We study small perturbations of diffusion processes in $\mathbb{R}^d$ that leave invariant a finite collection of hypersurfaces. Each surface is assumed to be repelling for the unperturbed process, and the unperturbed motion on each of the…

概率论 · 数学 2026-02-12 Leonid Koralov , Chenglin Liu

Discrete time random walks, in which a step of random sign but constant length $\delta x$ is performed after each time interval $\delta t$, are widely used models for stochastic processes. In the case of a correlated random walk, the next…

定量方法 · 定量生物学 2012-07-11 F. Stadler , C. Metzner , J. Steinwachs , B. Fabry

Counts in cells are used to analyse the higher order properties of the statistics of the EDSGC survey. The probability distribution is obtained from an equal area projection source catalog with infinite oversampling over the range…

天体物理学 · 物理学 2009-10-28 István Szapudi , Avery Meiksin , Robert C. Nichol

The general relationship between an arbitrary frequency distribution and the expectation value of the frequency distributions of its samples is discussed. A wide set of measurable quantities ("invariant moments") whose expectation value…

数据分析、统计与概率 · 物理学 2015-06-15 Paolo Rossi

Sampling viable 3D structures (e.g., molecules and point clouds) with SE(3)-invariance using diffusion-based models proved promising in a variety of real-world applications, wherein SE(3)-invariant properties can be naturally characterized…

机器学习 · 计算机科学 2024-03-05 Zihan Zhou , Ruiying Liu , Jiachen Zheng , Xiaoxue Wang , Tianshu Yu

The cross section for the diffractive deep-inelastic scattering process $ep \to e X p$ is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data analysed cover the range \xpom <0.1 in…

高能物理 - 实验 · 物理学 2012-08-27 H1 Collaboration

We study the diffusion process in a Heisenberg chain with correlated spatial disorder, with a power spectrum in the momentum space behaving as $k^{-\beta}$, using a stochastic description. It establishes a direct connection between the…

We study scaling properties of stochastic aggregation processes in one dimension. Numerical simulations for both diffusive and ballistic transport show that the mass distribution is characterized by two independent nontrivial exponents…

统计力学 · 物理学 2007-05-23 E. Ben-Naim , P. L. Krapivsky

In this paper the diffusion entropy technique is applied to investigate the scaling behavior of financial markets. The scaling behaviors of four representative stock markets, Dow Jones Industrial Average, Standard&Poor 500, Heng Seng Index,…

物理与社会 · 物理学 2007-05-23 Shi-Min Cai , Pei-Ling Zhou , Hui-Jie Yang , Chun-Xia Yang , Bing-Hong Wang , Tao Zhou

In recent years, affiliate marketing has emerged as a revenue-sharing strategy where merchants collaborate with promoters to promote their products. It not only increases product exposure but also allows promoters to earn a commission. This…

信息检索 · 计算机科学 2025-10-14 Zhe Wang , Yaming Yang , Ziyu Guan , Bin Tong , Rui Wang , Wei Zhao , Hongbo Deng

We study the spectrum and transmission coefficient of plane waves propagating along square ribbons of varying widths, containing a square-shaped, PT-symmetric impurity region. We start with a zero-width ribbon (1D chain) and place a PT…

无序系统与神经网络 · 物理学 2024-03-21 Cristian Mejía-Cortés , Mario I. Molina

We show for a model of scale-free graphs with biased partner choice that knowing the exponent for the degree distribution is in general not sufficient to decide epidemic threshold properties for exponents less than three.We show that the…

凝聚态物理 · 物理学 2009-11-07 Ph. Blanchard , Ch. -H. Chang , T. Krueger

We consider the distribution of the sum and the maximum of a collection of independent exponentially distributed random variables. The focus is laid on the explicit form of the density functions (pdf) of non-i.i.d. sequences. Those are…

概率论 · 数学 2013-07-16 Markus Bibinger