重囗另类BBWSeⅹHD,av狼论坛,精品一卡2卡三卡4卡乱码理论,体育生gv老师浪小辉3p警察

A Bayesian based quasi-analytical al

時間:2023-04-27 14:45:54 天文地理論文 我要投稿
  • 相關推薦

A Bayesian based quasi-analytical algorithm for retrieval of inherent optical properties from ocean color

The recently developed quasi-analytical algorithm (QAA) is a promising algorithm for deriving inherent optical properties from ocean color. Unlike the conventional semi-analytical algorithm, QAA does not need a priori knowledge of the spectral shape of chlorophyll absorption. However, several empirical relations, which may not be universally applicable and can result in low noise tolerance, are involved in QAA. In this study, the Bayesian inversion theory is introduced to improve the performance of QAA. In the estimation of total absorption coefficient at the reference wavelength, instead of empirical algorithms used in the QAA, the Bayesian approach is employed in combination with an optical model that uses separate parameters to account explicitly for the contribution of molecular and particle scatterings to remote sensing reflectance, a priori knowledge produced by the QAA, the Akaike's Bayesian information criterion (ABIC) for choosing the optimal regularization parameter, and genetic algorithms for global optimization. Coefficients at other wavelengths are then derived using an empirical estimate of particle backscattering spectral shape. When applied to a simulated dataset synthesized by IOCCG, the Bayesian algorithm outperforms QAA algorithm, especially in higher chlorophyll concentration waters. The root mean square errors (RMSEs) between the true and the derived a(440) and bb(440) are reduced from 0.918 and 0.039 m-1 for QAA-555 to 0.367 and 0.023 m-1 for Bayes-555, 0.205 and 0.007 m-1 for QAA-640 to 0.092 and 0.005 m-1 for Bayes-640, and 0.207 and 0.007 m-1 for QAA-blending to 0.096 and 0.005 m-1 for Bayes-blending. Results of noise sensitivity analysis show that the Bayesian algorithm is more robust than QAA.

作 者: ZHAN Haigang SHI Ping CHEN Chuqun   作者單位: LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China  刊 名: 科學通報(英文版)  SCI 英文刊名: CHINESE SCIENCE BULLETIN  年,卷(期): 2005 50(23)  分類號: P7  關鍵詞: ocean color remote sensing   inherent optical properties   Bayesian inversion  

【A Bayesian based quasi-analytical al】相關文章:

AL實驗初中上學期學生習慣養成教育工作方案09-30

主站蜘蛛池模板: 丹阳市| 醴陵市| 灵武市| 米泉市| 大埔县| 锦屏县| 泽州县| 镇平县| 南漳县| 巴楚县| 融水| 齐齐哈尔市| 凌云县| 元阳县| 达日县| 石家庄市| 邓州市| 大安市| 叶城县| 壶关县| 哈巴河县| 新乐市| 湖州市| 黑龙江省| 梁河县| 南充市| 咸宁市| 南陵县| 常州市| 牙克石市| 涞水县| 司法| 涞源县| 中方县| 如皋市| 石渠县| 会同县| 上栗县| 黄龙县| 新兴县| 左权县|