恒星光谱

依据上述属性约简算法，采用VISUALFOXPRO6.0数据库管理系统，设计与实现了恒星光谱数据自动分类系统，实现了恒星光谱分类规则的自动提取。

According to the algorithm of attribute reduction , auto-classification system about stellar spectrum data is designed and implemented through using Visual FoxPro 6.0 , which automatically extract rules from stellar spectrum .

在多普勒效应的影响下，恒星光谱的谱线会发生移动，通过测量这些谱线的移动就能得到恒星的视向速度。

Wavelength of spectral lines in a stellar spectrum is always shifted caused by Doppler effects . By measuring the values of shifts , radial velocity of a star could be calculated .

本文主要介绍一种实用的基于主分量分析（PCA）法对恒星光谱进行快速自动的分类方法。

This paper introduces an efficient method of automated classification of stellar spectra based on the principal component analysis ( PCA ) .

使用SOFM方法进行恒星光谱自动分类

Automatic Classification of Stellar Spectra Using SOFM Method

最后，利用恒星光谱作为数据集，实验验证了RSFPA算法的正确性和有效性。

In the end , the RSFPA algorithm is validated by using star spectrum data as experiment data .

最后，基于SDSS恒星光谱数据的运行结果表明，利用该系统寻找天体光谱离群数据是可行的，从而为寻找未知的、特殊的天体光谱数据提供了一种新途径。

The preliminary experimental results based on SDSS star spectrum data show that the system is workable for outlier mining of celestial body spectrum data , and a new kind of effective way of finding unknown and peculiar celestial body spectrum data .

在8000至8670的波长范围内，利用一个由144颗恒星光谱组成的光谱厍，我们对57个巨椭圆和S0星系（MB<-21）的光谱和它们的平均光谱进行了光谱合成。

Using a library of spectra of 144 stars observed in the range 8000-8670 A , we have made a population synthesis of mean and individual spectra of 57 giant E / SO galaxies ( MB < - 21 ) .

第三、在上述研究的基础上，采用VC++6.0和Oracle9i作为开发工具，设计并实现了基于约束概念格的恒星光谱分类规则挖掘原型系统。

Third , on the basis of above , the mining system of classification rules for star spectra data based on constrained concept lattice are designed and realized by using VC + + 6.0 and Oracle 9i as development tools .

本文使用ELODIE实测恒星光谱库，先对其进行预处理，连续谱归一化以及剔除奇异数据并提取光谱数据的三个主要大气参数。

This paper uses spectral data of ELODIE spectrum library , which are preprocessed to normalize the continuous spectrum and eliminate the singular data . Then three main atmospheric parameters are extracted from the preprocessed spectral data .

恒星光谱线的跃迁系数和能源函数

The transition coefficients and source function for stellar spectral line

基于关联规则的恒星光谱数据相关性分析

Interrelation analysis of star optical spectra based on association rule

基于小波降噪与支持向量机的恒星光谱识别研究

Stellar Spectral Recognition Based on Wavelet De-Noising and SVM

一种基于主分量分析的恒星光谱快速分类法

A PCA Based Efficient Stellar Spectra Classification Method

基于非参数回归与最近邻方法的恒星光谱自动分类

An Automated Stellar Spectra Classification System Based on Non-Parameter Regression and Nearest Neighbor Method

系统运行结果表明，利用该系统分类未来恒星光谱数据是可行的。

The preliminary experimental results show the system is workable for stellar spectra data classification .

本文对引起恒星光谱线加宽的物理机制作了回顾。

The historical retrospect of physical mechanisms of spectral lines broadening in stars is presented .

实际上，要辨认恒星光谱中的谱线并不那么容易。

In practice the identification of lines in a star 's spectrum is not so easy .

这样，寻求新的理论解释恒星光谱线的加宽成为必要。

So it is necessary to seek new theories to explain the spectral lines broadening of stars .

在第十九章我们已了解到，恒星光谱中的红移是恒星背离地球的运动造成的。

In chap. 19 we saw that red shifts in stellar spectra result from motions away from the earth .

在分析不同色温恒星光谱分布特征的基础上，建立恒星光谱模型，计算色温差异引起的恒星定位误差。

In order to analyze the effect of color temperature in star sensor , the model of stellar spectrum was presented in this paper .

如果你看到，在行星的宿主恒星光谱中，如果看到奇怪的化学元素，它可能是来自另一个文明的讯号。他们意图发出这样的讯号，用讯号确实显示出他们的存在。

If you see , in the spectrum of a planet host star , if you see strange chemical elements , it can be a signal from a civilization which is there and they want to signal about it .

光谱蕴含着天体的重要信息，通过恒星光谱来得到恒星的大气物理参数是天文学中的一个基础工作，因此恒星光谱分析在天体研究中占有重要地位。

Spectra contain important informations about celestial bodies . Extraction of the atmospheric physical parameters of stars through the stellar spectra is a basic work in astronomy . The study of stellar spectra of the celestial bodies plays an important role .

恒星光谱一般具有明显的吸收线或者吸收带特征，而具有发射线的恒星光谱对应着特殊类型的恒星，如激变变星、HerbigAe/Be等。对这些光谱的后续研究有着重要的意义。

Stellar spectra are characterized by obvious absorption lines or absorption bands , while those with emission lines are usually special stars such as Cataclysmic Variable stars ( CVs ), HerbigAe / Be etc. The further study of this kind of spectra is meaningful .

公证员发布的文件宣称，杜兰是“太阳的主人。该恒星的光谱类型为G2，位于太阳系中心，与地球的平均距离为1.496亿公里。”

The document issued by the notary public declares Duran to be the " owner of the Sun , a star of spectral typeG2 , located in the centre of the solar system , located at an average distance from Earth of about 149600000 kilometres . "

如果恒星的光谱已知，就可得出尘埃的反照率。

If the stellar spectrum is known , the albedo of the dust can be obtained .

最后，采用恒星天体光谱数据作为形式背景，实验验证了该算法的有效性。

Finally , the experiments with celestial body spectra as the formal context validate the proposed algorithm .

恒星的光谱有相当大差异。

Stellar spectra vary considerably .

如果你看一些别的恒星的光谱，颜色会是一模一样的，

And if you were looking at the spectrum of some other star , the colors would be the same .

用摄谱仪分析恒星的光谱，可提供恒星的距离、温度、大小以及运动等方面的材料。

The analysis of starlight with the spectrograph has provided information on the distances , temperatures , sizes , and notions of the stars .

星系的光谱可以给出它们的距离、构成、分布和运动等信息。恒星的光谱可以确定它们的分布和运动、光度、温度、化学组成等物理状态。

From the spectra of galaxies , we can get their distance , composition , distribution and motion etc. From the stellar spectra , their distribution , motion , luminosity , temperature and its chemical composition etc. can be obtained .