| 基于粒子群优化的LAMOST初始波长定标方法 |
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| 引用本文： | 王生,朱张勤,祝佳,叶根红,叶中付.基于粒子群优化的LAMOST初始波长定标方法[J].天文学报,2011,52(5). |
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| 作者姓名： | 王生 朱张勤 祝佳 叶根红 叶中付 |
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| 作者单位： | 中国科学技术大学信号统计处理研究室 合肥230027 |
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| 基金项目： | 国家自然科学基金项目(11078016)资助 |
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| 摘 要： | 大天区面积多目标光纤光谱天文望远镜(Large Sky Area Multi-Object Fiber Spectroscopic Telescope,LAMOST)初始波长定标操作,对于在先验定标系数附近搜索解空间内的每一点,通过插值法生成对应定标系数下的虚拟定标灯谱,再将生成的虚拟定标灯谱与实测定标灯谱作互相关运算,使得相关系数最大时对应的定标系数即为初始定标结果,其实质是一个多参数寻优问题.粒子群优化是一种基于群体智能的随机全局优化算法,具有实现简单、精度高、收敛快的特点.鉴于粒子群优化的优异性能,提出一种基于粒子群优化的LAMOST初始波长定标方法,并设计相应算法和测试实验.实验结果表明,基于粒子群优化的LAMOST初始波长定标在收敛性、解的质量、运行时间等方面都优于基于改进遗传算法参数寻优方法.
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| 关 键 词： | 望远镜 方法:数值 |
An Effective Optimization Method for Initial Wavelength Calibration of LAMOST Based on PSO |
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| WANG Sheng,ZHU Zhang-qin,ZHU Jia,YE Gen-hong,YE Zhong-fu.An Effective Optimization Method for Initial Wavelength Calibration of LAMOST Based on PSO[J].Acta Astronomica Sinica,2011,52(5). |
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| Authors: | WANG Sheng ZHU Zhang-qin ZHU Jia YE Gen-hong YE Zhong-fu |
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| Institution: | WANG Sheng ZHU Zhang-qin ZHU Jia YE Gen-hong YE Zhong-fu (Institute of Statistical Signal Processing,University of Science and Technology of China,Hefei 230027) |
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| Abstract: | The initial wavelength calibration procedure of Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST) consists of three steps.Firstly,for each certain point in the search space near the prior calibration coefficients,its corresponding simulation arc spectrum could be obtained with the interpolation method.Then,the cross correlation between the simulation arc spectrum and the observed one will be calculated.Finally,the result of initial wavelength calibration is the calibration coefficient corres... |
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| Keywords: | telescopes methods numerical |
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