کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7845991 1508602 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feasibility of inverse problem solution for determination of city emission function from night sky radiance measurements
ترجمه فارسی عنوان
امکان سنجی راه حل مشکل معکوس برای تعیین عملکرد انتشار شهر از اندازه گیری های تابش آسمان شب
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
چکیده انگلیسی
The knowledge of the emission function of a city is crucial for simulation of sky glow in its vicinity. The indirect methods to achieve this function from radiances measured over a part of the sky have been recently developed. In principle, such methods represent an ill-posed inverse problem. This paper deals with the theoretical feasibility study of various approaches to solving of given inverse problem. Particularly, it means testing of fitness of various stabilizing functionals within the Tikhonov's regularization. Further, the L-curve and generalized cross validation methods were investigated as indicators of an optimal regularization parameter. At first, we created the theoretical model for calculation of a sky spectral radiance in the form of a functional of an emission spectral radiance. Consequently, all the mentioned approaches were examined in numerical experiments with synthetical data generated for the fictitious city and loaded by random errors. The results demonstrate that the second order Tikhonov's regularization method together with regularization parameter choice by the L-curve maximum curvature criterion provide solutions which are in good agreement with the supposed model emission functions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 213, July 2018, Pages 86-94
نویسندگان
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