A Multispectrum Fitting Program Based on Non-Linear Least-Squares Method for Line Parameters: Application to (CH4)-C-12
文献类型：期刊论文
| 作者 | Ma Hong-liang2,3; Zheng Jian-jie1,2,4; Liu Qiang2,4 ; Qian Xian-mei2,4; Zhu Wen-yue2,4
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| 刊名 | SPECTROSCOPY AND SPECTRAL ANALYSIS
 |
| 出版日期 | 2021-12-01 |
| 卷号 | 41 |
| 关键词 | Multispectrum fitting program Methane Absorption spectrum Line parameter |
| ISSN号 | 1000-0593 |
| DOI | 10.3964/j.issn.1000-0593(2021)12-3887-05 |
| 通讯作者 | Liu Qiang(liuq@aiofm.ac.cn) |
| 英文摘要 | The precise knowledge of the experimental spectroscopic line parameters of methane is widely used in atmospheric science and astronomical exploration, especially its collision broadening and temperature-dependent coefficients, which are important to study the methane molecular concentration profile. Precise experimental measurement is the significant method to obtain accurate spectral line parameters. In order to derive unknown parameters through a non-linear least-squares method, it is necessary to the simultaneous treatment of several experimental spectra in the same region were recorded with known experimental conditions (concentration, temperature, total pressure, absorption optical path and mixture ratio of gas molecule species, etc. ). Then these spectra were usually fitted separately using spectrum-by-spectrum fitting procedure, but this method was often time-consuming and errors were easily produced. In order to solve this problem, a multispectrum fitting procedure based upon the non-linear least-squares and Levenberg-Marquardt method have been developed, able to treat simultaneously several laboratory spectra obtained by tunable diode laser absorption spectroscopy. This procedure can obtain a set of spectral parameters based on the global fitting method. The theory, data processing and application of the procedure are presented in detail. The laboratory spectra of 6 transition lines of (CH4)-C-12 molecules in the 2 958 similar to 2 959 cm(-1) region are processed by using the Voigt profile of the multispectrum fitting program, and these lines air-broadening coefficients were obtained at five temperatures (296.0, 251.0, 223.0, 198.0, 173.0 K). The air-broadening coefficients of the present work are compared with the available values reported in the literature, which were obtained by spectrum-by-spectrum fitting procedure, and the difference between them lies within -4. 97% similar to 1. 58%. The results show that the broadening coefficients of these transitions in this work agree well with those available values. Among the 30 sets of correlation data, there are 4 sets whose fitting errors obtained by the spectrum-by-spectrum fitting program are smaller than those by the multispectrum fitting program, 2 sets with equal error values, and the remaining 24 sets whose fitting errors obtained by the multispectrum fitting program are smaller. Therefore, the multispectrum fitting program has good reliability and is suitable for processing gas molecular absorption spectrum. |
| WOS研究方向 | Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000747245000039 |
| 出版者 | OFFICE SPECTROSCOPY & SPECTRAL ANALYSIS |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/127569]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Liu Qiang |
| 作者单位 | 1.Univ Sci & Technol China, Sci Isl Branch Grad Sch, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, HFIPS, Hefei 230031, Peoples R China 3.Anqing Normal Univ, Sch Elect Engn & Intelligent Mfg, Anqing 246133, Peoples R China 4.Adv Laser Technol Lab Anhui Prov, Hefei 230037, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma Hong-liang,Zheng Jian-jie,Liu Qiang,et al. A Multispectrum Fitting Program Based on Non-Linear Least-Squares Method for Line Parameters: Application to (CH4)-C-12[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2021,41. |
| APA | Ma Hong-liang,Zheng Jian-jie,Liu Qiang,Qian Xian-mei,&Zhu Wen-yue.(2021).A Multispectrum Fitting Program Based on Non-Linear Least-Squares Method for Line Parameters: Application to (CH4)-C-12.SPECTROSCOPY AND SPECTRAL ANALYSIS,41. |
| MLA | Ma Hong-liang,et al."A Multispectrum Fitting Program Based on Non-Linear Least-Squares Method for Line Parameters: Application to (CH4)-C-12".SPECTROSCOPY AND SPECTRAL ANALYSIS 41(2021). |
入库方式： OAI收割
来源：合肥物质科学研究院
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