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arXiv 1609.07259astro-ph.IMgr-qc
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基于差分提升神经网络的LIGO数据瞬态分类

Transient Classification in LIGO data using Difference Boosting Neural Network

Nikhil Mukund, Sheelu Abraham, Shivaraj Kandhasamy, Sanjit Mitra, Ninan Sajeeth Philip

摘要:

引力波探测器数据中瞬变现象的检测和分类对于有效地搜索真实的天体物理事件和识别噪声源至关重要。我们提出了一种混合的方法,用于分类的短时间瞬变引力波数据中看到的监督和无监督的机器学习技术。为了训练分类器,我们使用通过对数据应用一维小波分解获得的相对小波能量和相应的熵。训练分类器的预测精度的9个模拟类的引力波瞬变和LIGO的第六次科学运行的硬件注入报告。有针对性的搜索一对夫妇的已知类的非天体物理信号在先进的LIGO数据的第一次观测运行。使用最少的训练样本准确识别瞬态类的能力使得所提出的方法成为LIGO探测器表征以及搜索短持续时间引力波信号的有用工具。

英文摘要:

Detection and classification of transients in data from gravitational wave detectors are crucial for efficient searches for true astrophysical events and identification of noise sources. We present a hybrid method for classification of short duration transients seen in gravitational wave data using both supervised and unsupervised machine learning techniques. To train the classifiers we use the relative wavelet energy and the corresponding entropy obtained by applying one-dimensional wavelet decomposition on the data. The prediction accuracy of the trained classifier on 9 simulated classes of gravitational wave transients and also LIGO's sixth science run hardware injections are reported. Targeted searches for a couple of known classes of non-astrophysical signals in the first observational run of Advanced LIGO data are also presented. The ability to accurately identify transient classes using minimal training samples makes the proposed method a useful tool for LIGO detector characterization as well as searches for short duration gravitational wave signals.

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