Using neural networks based template matching method to obtain redshifts of normal galaxies
文献类型：期刊论文
| 作者 | Xu, X; Luo, AL; Wu, FC ; Zhao, YH
|
| 刊名 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| 出版日期 | 2005-06-01 |
| 卷号 | 25期号:6页码:996-1001 |
| 关键词 | normal galaxy principal component analysis(PCA) probabilistic neural networks classification of redshifts template matching |
| 英文摘要 | Galaxies can be divided into two classes: normal galaxy (NG) and active galaxy (AG). In order to determine NG redshifts, an automatic effective method is proposed in this paper, which consists of the following three main steps: (1) From the template of normal galaxy, the two sets of samples are simulated, one with the redshift of 0. 0-0. 3, the other of 0. 3-0. 5, then the PCA is used to extract the main components, and train samples are projected to the main component subspace to obtain characteristic spectra. (2) The characteristic spectra are used to train a Probabilistic Neural Network to obtain a Bayes classifier. (3) An unknown real NG spectrum is first inputted to this Bayes classifier to determine the possible range of redshift, then the template matching is invoked to locate the redshift value within the estimated range. Compared with the traditional template matching technique with an unconstrained range, our proposed method not only halves the computational load, but also increases the estimation accuracy. As a result, the proposed method is particularly useful for automatic spectrum processing produced from a large-scale sky survey project. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Spectroscopy |
| 研究领域[WOS] | Spectroscopy |
| 关键词[WOS] | AUTOMATED CLASSIFICATION ; SPECTRAL CLASSIFICATION ; STELLAR SPECTRA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000230381500050 |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.ia.ac.cn/handle/173211/9068]  |
| 专题 | 自动化研究所_09年以前成果 |
| 作者单位 | 1.Chinese Acad Sci, Inst Automat, Natl Lab Pattern Recognit, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, X,Luo, AL,Wu, FC,et al. Using neural networks based template matching method to obtain redshifts of normal galaxies[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2005,25(6):996-1001. |
| APA | Xu, X,Luo, AL,Wu, FC,&Zhao, YH.(2005).Using neural networks based template matching method to obtain redshifts of normal galaxies.SPECTROSCOPY AND SPECTRAL ANALYSIS,25(6),996-1001. |
| MLA | Xu, X,et al."Using neural networks based template matching method to obtain redshifts of normal galaxies".SPECTROSCOPY AND SPECTRAL ANALYSIS 25.6(2005):996-1001. |
入库方式： OAI收割
来源：自动化研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。