A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction
文献类型：期刊论文
| 作者 | Xu, X; Wu, FC ; Hu, ZY; Luo, AL
|
| 刊名 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| 出版日期 | 2006 |
| 卷号 | 26期号:1页码:182-186 |
| 关键词 | normal galaxies redshift LLE manifold PCA |
| 英文摘要 | It is difficult to determine the redshifts of normal galaxies (NG) from their spectra because of their common weak absorption property. In the present work, a novel method is proposed to effectively deal with this issue. The proposed method is composed of the following three parts: At first, the wavelet transform coefficients at the fourth scaling are experimentally found to be appropriate and used as our features to represent the absorption information from NG absorption lines, break points, and absorption bands. Then, the features are mapped by a non-linear method, LLE(locally linear embedding), onto an one-dimensional manifold in the 3D space; Finally, the NG redshifts are obtained by the nearest neighborhood technique from the redshift distribution on the manifold. Besides, the proposed method is compared with widely used PCA method in the literature with SDSS database, and is shown to be more accurate for the redshifts determination. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Spectroscopy |
| 研究领域[WOS] | Spectroscopy |
| 关键词[WOS] | SPECTRA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000235046700049 |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.ia.ac.cn/handle/173211/9365]  |
| 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, Robot Vis Grp, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Natl Astron Observat, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, X,Wu, FC,Hu, ZY,et al. A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2006,26(1):182-186. |
| APA | Xu, X,Wu, FC,Hu, ZY,&Luo, AL.(2006).A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction.SPECTROSCOPY AND SPECTRAL ANALYSIS,26(1),182-186. |
| MLA | Xu, X,et al."A novel method for the determination of redshifts of normal galaxies by non-linear dimensionality reduction".SPECTROSCOPY AND SPECTRAL ANALYSIS 26.1(2006):182-186. |
入库方式： OAI收割
来源：自动化研究所
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