论文标题

低SNR引力波数据中的瞬态分类使用深度学习

Transient Classification in low SNR Gravitational Wave data using Deep Learning

论文作者

Nigam, Rahul, Mishra, Amit, Reddy, Pranath

论文摘要

重力波天文学的最新进展极大地加速了对多中文化天体物理学的研究。由于Ligo和其他引力波观测器提供的数据提供了数据,因此需要开发快速有效的算法来检测非没应物理瞬变和噪声。这些瞬态和噪声会干扰重力波和二进制合并的研究,并引起假阳性。在这里,我们建议使用深度学习算法来检测和对这些瞬态信号进行分类。传统的统计方法并不是针对处理时间信号的精心设计,但是被证明是有效的,诸如RNN-LSTM和Deep CNN之类的深入学习技术可有效解决诸如预测和时间序列分类之类的问题。我们还使用无监督的模型,例如总变化,主成分分析,支持向量机,小波分解或随机森林来提取特征提取和降噪,然后研究由RNN-LSTM和Deep CNN获得的结果,以分类低SNR信号中的瞬变。我们比较了通过各种无监督模型和监督模型的组合获得的结果。该方法可以扩展到对瞬态和合并信号的实时检测,并使用深度学习优化的GPU进行早期预测和研究各种天文事件。我们还将探索和比较其他机器学习模型,例如MLP,堆叠的自动编码器,随机森林,极端学习机,支持向量机和逻辑回归分类器。

The recent advances in Gravitational-wave astronomy have greatly accelerated the study of Multimessenger astrophysics. There is a need for the development of fast and efficient algorithms to detect non-astrophysical transients and noises due to the rate and scale at which the data is being provided by LIGO and other gravitational wave observatories. These transients and noises can interfere with the study of gravitational waves and binary mergers and induce false positives. Here, we propose the use of deep learning algorithms to detect and classify these transient signals. Traditional statistical methods are not well designed for dealing with temporal signals but supervised deep learning techniques such as RNN-LSTM and deep CNN have proven to be effective for solving problems such as time-series forecasting and time-series classification. We also use unsupervised models such as Total variation, Principal Component Analysis, Support Vector Machine, Wavelet decomposition or Random Forests for feature extraction and noise reduction and then study the results obtained by RNN-LSTM and deep CNN for classifying the transients in low-SNR signals. We compare the results obtained by the combination of various unsupervised models and supervised models. This method can be extended to real-time detection of transients and merger signals using deep-learning optimized GPU's for early prediction and study of various astronomical events. We will also explore and compare other machine learning models such as MLP, Stacked Autoencoder, Random forests, extreme learning machine, Support Vector machine and logistic regression classifier.

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