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Star clusters provide an excellent opportunity to study the role of environment on determining the frequencies of short period planets. They provide a large sample of stars which can be imaged simultaneously, with a common distance, age and…

天体物理学 · 物理学 2007-10-01 David T. F. Weldrake

The paper addresses design/building frameworks for some kinds of tree-like and hierarchical structures of systems. The following approaches are examined: (1) expert-based procedures, (2) hierarchical clustering; (3) spanning problems (e.g.,…

最优化与控制 · 数学 2012-12-12 Mark Sh. Levin

We have attempted to find the global minima of clusters containing between 20 and 80 atoms bound by the Morse potential as a function of the range of the interatomic force. The effect of decreasing the range is to destabilize strained…

凝聚态物理 · 物理学 2008-02-03 Jonathan Doye , David Wales

We assess the fragmentation of strange quark matter in astrophysical events, showing that the application of statistical multifragmentation models suggests that most of the fragments (strangelets) should belong to an unstable baryon number…

高能天体物理现象 · 物理学 2015-04-15 J. E. Horvath , L. Paulucci Marinho

The problem of binary minimization of a quadratic functional in the configuration space is discussed. In order to increase the efficiency of the random-search algorithm it is proposed to change the energy functional by raising to a power…

无序系统与神经网络 · 物理学 2011-09-02 Iakov Karandashev , Boris Kryzhanovsky

Anticipating the low energy arrangements of atoms in space is an indispensable scientific task. Modern stochastic approaches to searching for these configurations depend on the optimisation of structures to nearby local minima in the energy…

材料科学 · 物理学 2019-02-07 Chris J. Pickard

Constrained clustering has been well-studied for algorithms such as $K$-means and hierarchical clustering. However, how to satisfy many constraints in these algorithmic settings has been shown to be intractable. One alternative to encode…

机器学习 · 计算机科学 2012-09-24 Xiang Wang , Buyue Qian , Ian Davidson

Fracton topological order hosts fractionalized point-like excitations (e.g., fractons) that have restricted mobility. In this article, we explore even more bizarre realization of fracton phases that admit spatially extended excitations with…

强关联电子 · 物理学 2020-07-01 Meng-Yuan Li , Peng Ye

Global equilibrium fragmentation inside a freeze out constraining volume is a working hypothesis widely used in nuclear fragmentation statistical models. In the framework of classical Lennard Jones molecular dynamics, we study how the…

核理论 · 物理学 2009-11-10 A. Chernomoretz , F. Gulminelli , M. J. Ison , C. O. Dorso

Despite rapid progress in scene segmentation in recent years, 3D segmentation methods are still limited when there is severe occlusion. The key challenge is estimating the segment boundaries of (partially) occluded objects, which are…

机器人学 · 计算机科学 2021-04-02 Andrew Price , Kun Huang , Dmitry Berenson

The zero range process is of particular importance as a generic model for domain wall dynamics of one-dimensional systems far from equilibrium. We study this process in one dimension with rates which induce an effective attraction between…

统计力学 · 物理学 2018-04-26 Stefan Grosskinsky , Gunter M. Schuetz , Herbert Spohn

Clustering is a well-known unsupervised machine learning approach capable of automatically grouping discrete sets of instances with similar characteristics. Constrained clustering is a semi-supervised extension to this process that can be…

Spectral clustering is a powerful method for finding structure in a dataset through the eigenvectors of a similarity matrix. It often outperforms traditional clustering algorithms such as $k$-means when the structure of the individual…

数值分析 · 数学 2019-04-26 Paola Favati , Grazia Lotti , Ornella Menchi , Francesco Romani

Contemporary accelerator designs exhibit a high degree of spatial localization, wherein two-dimensional physical distance determines communication costs between processing elements. This situation presents considerable algorithmic…

分布式、并行与集群计算 · 计算机科学 2024-08-09 Yves Baumann , Tal Ben-Nun , Maciej Besta , Lukas Gianinazzi , Torsten Hoefler , Piotr Luczynski

With the rapid growth of knowledge, it shows a steady trend of knowledge fragmentization. Knowledge fragmentization manifests as that the knowledge related to a specific topic in a course is scattered in isolated and autonomous knowledge…

人工智能 · 计算机科学 2020-05-29 Qinghua Zheng , Jun Liu , Hongwei Zeng , Zhaotong Guo , Bei Wu , Bifan Wei

Magnetic fields are important at every scale in the star formation process: from the dynamics of the ISM in galaxies, to the collapse of turbulent molecular clouds to form stars and in the fragmentation of individual star forming cores. The…

天体物理学 · 物理学 2008-04-30 Daniel J. Price , Matthew R. Bate , Clare L. Dobbs

The Lip-field approach is a new way to regularize softening material models. It has already been tested in 1D quasistatic and 2D quasistatic: this paper extends it to 1D dynamics, on the challenging problem of dynamic fragmentation. The…

计算工程、金融与科学 · 计算机科学 2022-03-10 Nicolas Moës , Benoît Lé , Andrew Stershic

The properties of small clusters can differ dramatically from the bulk phases of the same constituents. In equilibrium, cluster assembly has been recently explored, whereas out of equilibrium, the physical principles of clustering remain…

软凝聚态物质 · 物理学 2019-03-22 Melody X. Lim , Anton Souslov , Vincenzo Vitelli , Heinrich M. Jaeger

Tree search algorithms, such as branch-and-bound, are the most widely used tools for solving combinatorial and nonconvex problems. For example, they are the foremost method for solving (mixed) integer programs and constraint satisfaction…

人工智能 · 计算机科学 2018-05-18 Maria-Florina Balcan , Travis Dick , Tuomas Sandholm , Ellen Vitercik

Subspace clustering refers to the problem of segmenting data drawn from a union of subspaces. State-of-the-art approaches for solving this problem follow a two-stage approach. In the first step, an affinity matrix is learned from the data…

计算机视觉与模式识别 · 计算机科学 2017-04-06 Chun-Guang Li , Chong You , René Vidal