基于hake的普通盐类高光谱数据解混计算方法。

Q1 Chemistry Chemistry Central Journal Pub Date : 2018-08-09 DOI:10.1186/s13065-018-0460-z
Fares M Howari, Gheorge Acbas, Yousef Nazzal, Fatima AlAydaroos
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引用次数: 7

摘要

环境科学家目前正在评估高光谱遥感探测、识别和分析自然成分的能力,包括矿物、岩石、植被和土壤。本文讨论了使用非线性反射模型来区分多组分颗粒混合物。对本文数据的分析表明,虽然通常可以从吸收带的诊断波长找到组分的身份,但定量丰度的确定需要了解复折射率和平均粒子散射反照率,相函数和尺寸。本研究发展了一种光谱解调岩盐和石膏混合物的方法。利用已知组分的折射率,借助于哈普克理论和勒让德多项式,提出了一种计算岩盐和石膏共混物组分粒径和混合系数的方法。该方法中的物质因素包括相函数参数、双向反射率、虚指数、晶粒尺寸和迭代多项式拟合。从最佳拟合方法获得的Hapke参数与文献报道的参数相当。推导出光学常数(实折射率n和虚折射率系数k),确定几何参数后,即可计算出单散射反照率(ω),从而实现光谱解混。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Hapke-based computational method to enable unmixing of hyperspectral data of common salts.

Environmental scientists are currently assessing the ability of hyper-spectral remote sensing to detect, identify, and analyze natural components, including minerals, rocks, vegetation and soil. This paper discusses the use of a nonlinear reflectance model to distinguish multicomponent particulate mixtures. Analysis of the data presented in this paper shows that, although the identity of the components can often be found from diagnostic wavelengths of absorption bands, the quantitative abundance determination requires knowledge of the complex refractive indices and average particle scattering albedo, phase function and size. The present study developed a method for spectrally unmixing halite and gypsum combinations. Using the known refractive indexes of the components, and with the assistance of Hapke theory and Legendre polynomials, the authors develop a method to find the component particle sizes and mixing coefficients for blends of halite and gypsum. Material factors in the method include phase function parameters, bidirectional reflectance, imaginary index, grain sizes, and iterative polynomial fitting. The obtained Hapke parameters from the best-fit approach were comparable to those reported in the literature. After the optical constants (n, the so-called real index of refraction and k, the coefficient of the imaginary index of refraction) are derived, and the geometric parameters are determined, single-scattering albedo (or ω) can be calculated and spectral unmixing becomes possible.

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来源期刊
Chemistry Central Journal
Chemistry Central Journal 化学-化学综合
CiteScore
4.40
自引率
0.00%
发文量
0
审稿时长
3.5 months
期刊介绍: BMC Chemistry is an open access, peer reviewed journal that considers all articles in the broad field of chemistry, including research on fundamental concepts, new developments and the application of chemical sciences to broad range of research fields, industry, and other disciplines. It provides an inclusive platform for the dissemination and discussion of chemistry to aid the advancement of all areas of research. Sections: -Analytical Chemistry -Organic Chemistry -Environmental and Energy Chemistry -Agricultural and Food Chemistry -Inorganic Chemistry -Medicinal Chemistry -Physical Chemistry -Materials and Macromolecular Chemistry -Green and Sustainable Chemistry
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