An Efficient Method for Rare Spectra Retrieval in Astronomical Databases

An Efficient Method for Rare Spectra Retrieval in Astronomical Databases
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天文数据库中稀有光谱检索的有效方法

DOI:
10.1088/1538-3873/128/961/034502
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发表时间:
2016-02
影响因子:
3.5
通讯作者:
Guo Yanxin
Guo Yanxin
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Du Changde;Luo Ali;Yang Haifeng;Hou Wen;Guo Yanxin

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天文数据挖掘最重要的目标之一是在大量光谱数据集中系统地搜索特定的稀有天体,给定一小部分具有相同类型的已识别样本。现有的分类方法主要是基于二分类的,当已知样本太少时,二分类方法往往存在不完全性。基于秩的方法可以为这种情况提供很好的解决方案。在研究了几种算法的基础上,提出了一种结合二分排序模型和自举聚集技术的方法。在Sloan数字巡天数据Release 10的光谱数据中搜索碳星时应用了该方法,并与其他几种流行的数据挖掘方法进行了比较。实验结果表明,该方法不仅是最有效的方法,而且是在大量未标记数据中搜索稀有光谱时耗时最少的方法。
One of the most important aims of astronomical data mining is to systematically search for specific rare objects in a massive spectral data set, given a small fraction of identified samples with the same type. Most existing methods are mainly based on binary classification, which usually suffers from incompleteness when there are too few known samples. Rank-based methods could provide good solutions for such cases. After investigating several algorithms, a method combining a bipartite ranking model with bootstrap aggregating techniques was developed in this paper. The method was applied while searching for carbon stars in the spectral data of Sloan Digital Sky Survey Data Release 10 and compared with several other popular methods used for data mining. Experimental results validate that the proposed method is not only the most effective but also the least time-consuming technique among its competitors when searching for rare spectra in a large but unlabeled data set.
DOI: 10.1023/b:mach.0000008084.60811.49
发表时间: 2004-01-01
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斯隆数字巡天第十次数据发布:来自 SDSS-III 阿帕奇点天文台银河演化实验的首个光谱数据
DOI: 10.1088/0067-0049/211/2/17
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