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In the current era of stellar spectroscopic surveys, synthetic spectral libraries are the basis for the derivation of stellar parameters and chemical abundances. In this paper, we compare the stellar parameters determined using five popular…

天体物理仪器与方法 · 物理学 2020-09-03 Spencer Bialek , Sébastien Fabbro , Kim A. Venn , Nripesh Kumar , Teaghan O'Briain , Kwang Moo Yi

Dual-energy computed tomography (DECT) utilizes separate X-ray energy spectra to improve multi-material decomposition (MMD) for various diagnostic applications. However accurate decomposing more than two types of material remains…

图像与视频处理 · 电气工程与系统科学 2023-11-02 Di Xu , Qihui Lyu , Dan Ruan , Ke Sheng

Very metal-poor (VMP, [Fe/H]<-2.0) stars offer a wealth of information on the nature and evolution of elemental production in the early galaxy and universe. The upcoming China Space Station Telescope (CSST) will provide us with a large…

太阳与恒星天体物理 · 物理学 2023-02-23 Tianmin Wu , Yude Bu , Jianhang Xie , Junchao Liang , Wei Liu , Zhenping Yi , Xiaoming Kong , Meng Liu

We study the segmental recurrent neural network for end-to-end acoustic modelling. This model connects the segmental conditional random field (CRF) with a recurrent neural network (RNN) used for feature extraction. Compared to most previous…

计算与语言 · 计算机科学 2016-06-21 Liang Lu , Lingpeng Kong , Chris Dyer , Noah A. Smith , Steve Renals

The computational properties of neural systems are often thought to be implemented in terms of their network dynamics. Hence, recovering the system dynamics from experimentally observed neuronal time series, like multiple single-unit (MSU)…

神经元与认知 · 定量生物学 2017-07-05 Daniel Durstewitz

Convolutional Neural Networks are widely used to process spatial scenes, but their computational cost is fixed and depends on the structure of the network used. There are methods to reduce the cost by compressing networks or varying its…

计算机视觉与模式识别 · 计算机科学 2019-04-15 Sang-ho Lee , Simyung Chang , Nojun Kwak

We have shown that data-driven models are effective for inferring physical attributes of stars (labels; Teff, logg, [M/H]) from spectra, even when the signal-to-noise ratio is low. Here we explore whether this is possible when the…

太阳与恒星天体物理 · 物理学 2016-03-11 Andrew R. Casey , David W. Hogg , Melissa Ness , Hans-Walter Rix , Anna Q Y Ho , Gerry Gilmore

The high energy cost of processing deep convolutional neural networks impedes their ubiquitous deployment in energy-constrained platforms such as embedded systems and IoT devices. This work introduces convolutional layers with pre-defined…

计算机视觉与模式识别 · 计算机科学 2020-02-06 Souvik Kundu , Mahdi Nazemi , Massoud Pedram , Keith M. Chugg , Peter A. Beerel

Deep Learning networks have established themselves as providing state of art performance for semantic segmentation. These techniques are widely applied specifically to medical detection, segmentation and classification. The advent of the…

图像与视频处理 · 电气工程与系统科学 2021-02-02 Kaushik Dutta

A fundamental challenge for wide-field imaging surveys is obtaining follow-up spectroscopic observations: there are > $10^9$ photometrically cataloged sources, yet modern spectroscopic surveys are limited to ~few x $10^6$ targets. As we…

太阳与恒星天体物理 · 物理学 2015-06-23 A. A. Miller , J. S. Bloom , J. W. Richards , Y. S. Lee , D. L. Starr , N. R. Butler , S. Tokarz , N. Smith , J. A. Eisner

Wide field small aperture telescopes are widely used for optical transient observations. Detection and classification of astronomical targets in observed images are the most important and basic step. In this paper, we propose an…

天体物理仪器与方法 · 物理学 2020-05-06 Peng Jia , Qiang Liu , Yongyang Sun

Convolutional neural network (CNN) and its variants have led to many state-of-art results in various fields. However, a clear theoretical understanding about them is still lacking. Recently, multi-layer convolutional sparse coding (ML-CSC)…

机器学习 · 计算机科学 2020-07-22 Zhiyang Zhang , Shihua Zhang

Classification of very high resolution (VHR) satellite images has three major challenges: 1) inherent low intra-class and high inter-class spectral similarities, 2) mismatching resolution of available bands, and 3) the need to regularize…

计算机视觉与模式识别 · 计算机科学 2018-12-05 John Ray Bergado , Claudio Persello , Alfred Stein

Various architectures (such as GoogLeNets, ResNets, and DenseNets) have been proposed. However, the existing networks usually suffer from either redundancy of convolutional layers or insufficient utilization of parameters. To handle these…

计算机视觉与模式识别 · 计算机科学 2020-04-27 Zhiyu Zhu , Zhen-Peng Bian , Junhui Hou , Yi Wang , Lap-Pui Chau

We present new Recurrent Neural Network (RNN) cells for image classification using a Neural Architecture Search (NAS) approach called DARTS. We are interested in the ReNet architecture, which is a RNN based approach presented as an…

计算机视觉与模式识别 · 计算机科学 2023-04-13 Brian Moser , Federico Raue , Jörn Hees , Andreas Dengel

Computed tomography (CT) generates a stack of cross-sectional images covering a region of the body. The visual assessment of these images for the identification of potential abnormalities is a challenging and time consuming task due to the…

机器学习 · 统计学 2016-10-03 Petros-Pavlos Ypsilantis , Giovanni Montana

We discuss relations between Residual Networks (ResNet), Recurrent Neural Networks (RNNs) and the primate visual cortex. We begin with the observation that a special type of shallow RNN is exactly equivalent to a very deep ResNet with…

机器学习 · 计算机科学 2021-01-05 Qianli Liao , Tomaso Poggio

Accurate photometric redshift estimation is critical for observational cosmology, especially in large-scale surveys where spectroscopic measurements are impractical. Traditional approaches include template fitting and machine learning, each…

天体物理仪器与方法 · 物理学 2026-04-15 Jonas Chris Ferrao , Dickson Dias , Pranav Naik , Glory D'Cruz , Anish Naik , Siya Khandeparkar , Manisha Gokuldas Fal Dessai

The optical depth to reionization, a key parameter of the $\Lambda$CDM model, can be computed within astrophysical frameworks for star formation by modeling the evolution of the intergalactic medium. Accurate evaluation of this parameter is…

宇宙学与河外天体物理 · 物理学 2025-03-17 Gaétan Facchinetti

LiDAR segmentation has become a crucial component of advanced autonomous driving systems. Recent range-view LiDAR segmentation approaches show promise for real-time processing. However, they inevitably suffer from corrupted contextual…

计算机视觉与模式识别 · 计算机科学 2025-03-24 Xiang Xu , Lingdong Kong , Hui Shuai , Qingshan Liu