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Neural networks for point clouds, which respect their natural invariance to permutation and rigid motion, have enjoyed recent success in modeling geometric phenomena, from molecular dynamics to recommender systems. Yet, to date, no model…

机器学习 · 计算机科学 2024-04-10 Snir Hordan , Tal Amir , Steven J. Gortler , Nadav Dym

In complex plasmas, the behavior of freely floating micrometer sized particles is studied. The particles can be directly visualized and recorded by digital video cameras. To analyze the dynamics of single particles, reliable algorithms are…

等离子体物理 · 物理学 2018-02-14 Daniel P. Mohr , Christina A. Knapek , Peter Huber , Erich Zaehringer

An automated and reliable processing of bubbly flow images is highly needed to analyse large data sets of comprehensive experimental series. A particular difficulty arises due to overlapping bubble projections in recorded images, which…

计算机视觉与模式识别 · 计算机科学 2022-08-08 Hendrik Hessenkemper , Sebastian Starke , Yazan Atassi , Thomas Ziegenhein , Dirk Lucas

A first step in exploring population structure in crop plants and other organisms is to define the number of subpopulations that exist for a given data set. The genetic marker data sets being generated have become increasingly large over…

应用统计 · 统计学 2014-01-09 Mark A. Newell , Dianne Cook , Heike Hofmann , Jean-Luc Jannink

This paper presents a deep-learning based framework for addressing the problem of accurate cloud detection in remote sensing images. This framework benefits from a Fully Convolutional Neural Network (FCN), which is capable of pixel-level…

计算机视觉与模式识别 · 计算机科学 2018-10-16 Sorour Mohajerani , Thomas A. Krammer , Parvaneh Saeedi

We study the core mass function (CMF) within 32 dense clumps in seven infrared dark clouds (IRDCs) with the Atacama Large Millimeter/submillimeter Array (ALMA) via 1.3~mm continuum emission at a resolution of $\sim$1". We have identified…

星系天体物理 · 物理学 2018-08-08 Mengyao Liu , Jonathan C. Tan , Yu Cheng , Shuo Kong

In this paper, we present the tools used to search for galaxy clusters in the Kilo Degree Survey (KiDS), and our first results. The cluster detection is based on an implementation of the optimal filtering technique that enables us to…

The problem of estimating the number of clusters (say k) is one of the major challenges for the partitional clustering. This paper proposes an algorithm named k-SCC to estimate the optimal k in categorical data clustering. For the…

机器学习 · 计算机科学 2025-01-28 Duy-Tai Dinh , Tsutomu Fujinami , Van-Nam Huynh

Galaxy cluster number counts are an important probe to constrain cosmological parameters. One of the main ingredients of the analysis, along with accurate estimates of the clusters' masses, is the selection function, and in particular the…

宇宙学与河外天体物理 · 物理学 2024-05-29 Stefano Gallo , Marian Douspis , Elie Soubrié , Laura Salvati

We use deep learning to explore the nature of observed giant clumps in high-redshift disc galaxies, based on their identification and classification in cosmological simulations. Simulated clumps are detected using the 3D gas and stellar…

(Abridged) The Census of High- and Medium-mass Protostars (CHaMP) is the first large-scale (280 degree<l<300 degree, -4 degree<b<2 degree), unbiased, sub-parsec resolution survey of Galactic molecular clumps and their embedded stars. Barnes…

星系天体物理 · 物理学 2015-06-12 Bo Ma , Jonathan C. Tan , Peter J. Barnes

Uncovering the community structure exhibited by real networks is a crucial step towards an understanding of complex systems that goes beyond the local organization of their constituents. Many algorithms have been proposed so far, but none…

物理与社会 · 物理学 2010-09-17 Andrea Lancichinetti , Santo Fortunato

Determining the number of clusters is a fundamental issue in data clustering. Several algorithms have been proposed, including centroid-based algorithms using the Euclidean distance and model-based algorithms using a mixture of probability…

机器学习 · 计算机科学 2024-07-30 Ryosuke Motegi , Yoichi Seki

Filaments play a crucial role in providing the necessary environmental conditions for star formation, actively participating in the process. To facilitate the identification and analysis of filaments, we introduce DPConCFil (Directional and…

星系天体物理 · 物理学 2025-01-10 Yu Jiang

We report ALMA Band 6 continuum observations of 2000 AU resolution toward four massive molecular clouds in the Central Molecular Zone of the Galaxy. To study gas fragmentation, we use the dendrogram method to identify cores as traced by the…

In this work we present the galaxy clustering measurements of the two DES lens galaxy samples: a magnitude-limited sample optimized for the measurement of cosmological parameters, MagLim, and a sample of luminous red galaxies selected with…

宇宙学与河外天体物理 · 物理学 2022-02-09 M. Rodríguez-Monroy , N. Weaverdyck , J. Elvin-Poole , M. Crocce , A. Carnero Rosell , F. Andrade-Oliveira , S. Avila , K. Bechtol , G. M. Bernstein , J. Blazek , H. Camacho , R. Cawthon , J. De Vicente , J. DeRose , S. Dodelson , S. Everett , X. Fang , I. Ferrero , A. Ferté , O. Friedrich , E. Gaztanaga , G. Giannini , R. A. Gruendl , W. G. Hartley , K. Herner , E. M. Huff , M. Jarvis , E. Krause , N. MacCrann , J. Mena-Fernández , J. Muir , S. Pandey , Y. Park , A. Porredon , J. Prat , R. Rosenfeld , A. J. Ross , E. Rozo , E. S. Rykoff , E. Sanchez , D. Sanchez Cid , I. Sevilla-Noarbe , M. Tabbutt , C. To , E. L. Wagoner , R. H. Wechsler , M. Aguena , S. Allam , A. Amon , J. Annis , D. Bacon , E. Baxter , E. Bertin , S. Bhargava , D. Brooks , D. L. Burke , M. Carrasco Kind , J. Carretero , F. J. Castander , A. Choi , C. Conselice , M. Costanzi , L. N. da Costa , M. E. S. Pereira , S. Desai , H. T. Diehl , B. Flaugher , P. Fosalba , J. Frieman , J. García-Bellido , T. Giannantonio , D. Gruen , J. Gschwend , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , B. Jain , D. J. James , K. Kuehn , N. Kuropatkin , M. Lima , M. A. G. Maia , M. March , J. L. Marshall , P. Melchior , F. Menanteau , C. J. Miller , R. Miquel , J. J. Mohr , R. Morgan , A. Palmese , F. Paz-Chinchón , A. Pieres , A. A. Plazas Malagón , A. Roodman , V. Scarpine , S. Serrano , M. Smith , M. Soares-Santos , E. Suchyta , G. Tarle , D. Thomas , T. N. Varga

We have developed a multiscale structure identification algorithm for the detection of overdensities in galaxy data that identifies structures having radii within a user-defined range. Our "multiscale probability mapping" technique combines…

宇宙学与河外天体物理 · 物理学 2015-06-03 Anthony G. Smith , Andrew M. Hopkins , Richard W. Hunstead , Kevin A. Pimbblet

Galaxy clusters identified from the Sunyaev Zel'dovich (SZ) effect are a key ingredient in multi-wavelength cluster-based cosmology. We present a comparison between two methods of cluster identification: the standard Matched Filter (MF)…

宇宙学与河外天体物理 · 物理学 2021-08-18 Zhen Lin , Nicholas Huang , Camille Avestruz , W. L. Kimmy Wu , Shubhendu Trivedi , João Caldeira , Brian Nord

Clustering a graph means identifying internally dense subgraphs which are only sparsely interconnected. Formalizations of this notion lead to measures that quantify the quality of a clustering and to algorithms that actually find…

数据结构与算法 · 计算机科学 2011-12-12 Robert Görke , Andrea Schumm , Dorothea Wagner

Pulsar searching with next-generation radio telescopes requires efficiently sifting through millions of candidates generated by search pipelines to identify the most promising ones. This challenge has motivated the utilization of Artificial…