On the Learning Property of Logistic and Softmax Losses for Deep Neural Networks

Kavli Affiliate: Li Xin Li | First 5 Authors: Xiangrui Li, Xin Li, Deng Pan, Dongxiao Zhu, | Summary: Deep convolutional neural networks (CNNs) trained with logistic and softmax losses have made significant advancement in visual recognition tasks in computer vision. When training data exhibit class imbalances, the class-wise reweighted version of logistic and softmax […]


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On the Search for Feedback in Reinforcement Learning

Kavli Affiliate: Ran Wang | First 5 Authors: Ran Wang, Karthikeya S. Parunandi, Aayushman Sharma, Raman Goyal, Suman Chakravorty | Summary: The problem of Reinforcement Learning (RL) in an unknown nonlinear dynamical system is equivalent to the search for an optimal feedback law utilizing the simulations/ rollouts of the dynamical system. Most RL techniques search […]


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Catching butterflies in the sky: Extended catalog of winged or X-shaped radio sources from the latest FIRST data release

Kavli Affiliate: Xuebing Wu | First 5 Authors: Xiaolong Yang, Ravi Joshi, Gopal-Krishna, Tao An, Luis C. Ho | Summary: We present a catalog of 290 "winged" or X-shaped radio galaxies (XRGs) extracted from the latest (2014 December 17) data release of the "Very Large Array Faint Images of the Radio Sky at Twenty centimeter." […]


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Design of Millimeter-wave Detector for Gyrotron Power Monitoring

Kavli Affiliate: Fukun Liu | First 5 Authors: Weiye Xu, Handong Xu, Fukun Liu, Xiaojie Wang, | Summary: The real-time power monitoring of gyrotron is one of the key issues in the operation of electron cyclotron resonance heating system. The detector can be used for real-time power monitoring. We analyzed the principle of diode detection […]


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The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 edition

Kavli Affiliate: Eric Peng | First 5 Authors: The MSE Science Team, Carine Babusiaux, Maria Bergemann, Adam Burgasser, Sara Ellison | Summary: (Abridged) The Maunakea Spectroscopic Explorer (MSE) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. It will unveil the composition and dynamics of the faint Universe and […]


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Astro2020 Science White Paper: Black Holes Across Cosmic Time

Kavli Affiliate: Luis Ho | First 5 Authors: Kayhan Gültekin, Aaron Barth, Karl Gebhardt, Jenny Greene, Luis Ho | Summary: Supermassive black holes are located at the center of most, if not all, massive galaxies. They follow close correlations with global properties of their host galaxies (scaling relations), and are thought to play a crucial […]


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A close look at the dwarf AGN of NGC 4395: optical and near-IR integral field spectroscopy

Kavli Affiliate: Luis Ho | First 5 Authors: Carine Brum, Marlon R. Diniz, Rogemar A. Riffel, Alberto Rodriguez-Ardila, Luis Ho | Summary: Intermediate mass black holes (10$^3$-10$^5$ M$_odot$) in the center of dwarf galaxies are believed to be analogous to growing Active Galactic Nuclei (AGN) in the early Universe. Their characterization can provide insight about […]


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Mapping the Inner Structure of Quasars with Time-Domain Spectroscopy

Kavli Affiliate: Luis Ho | First 5 Authors: Yue Shen, Scott Anderson, Edo Berger, W. N. Brandt, Gisella De Rosa | Summary: The ubiquitous variability of quasars across a wide range of wavelengths and timescales encodes critical information about the structure and dynamics of the circumnuclear emitting regions that are too small to be directly […]


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The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: I. Kinematics of the stellar body

Kavli Affiliate: Eric Peng | First 5 Authors: Eric Emsellem, Remco F. J. van der Burg, Jeremy Fensch, Tereza Jerabkova, Anita Zanella | Summary: The so-called ultra-diffuse galaxy NGC~1052-DF2 was announced to be a galaxy lacking dark matter based on a spectroscopic study of its constituent globular clusters. Here we present the first spectroscopic analysis […]


Continue.. The ultra-diffuse galaxy NGC 1052-DF2 with MUSE: I. Kinematics of the stellar body