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題 名 | 運用匹配聲場處埋法反算海床地音參數=Inversion of Ocean-Bottom Geoacoustic Properties by Matched Field Processing |
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作 者 | 陳琪芳; 林穎聰; | 書刊名 | 國立臺灣大學工程學刊 |
卷 期 | 76 1999.06[民88.06] |
頁 次 | 頁103-117 |
分類號 | 351.925 |
關鍵詞 | 組合最佳化; 匹配聲場處埋法; 模擬退火演算法; SAFARI程式; Matched-field-processing; Combinatorial optimization problem; Simulated annealing algorithm; SAFARI code; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究目的是以組合最佳化的觀念建立一套能夠有效反算海床地音參 數的匹配聲場處理法。這套處理法在架構上可分成兩個部分 ─ 最佳化演算法和 聲場正算模式。本研究選擇模擬退火演算法 (Simulated Annealing Algorithm) 當 作匹配聲場處理法的最佳化演算法,另外以SAFARI程式作為聲場正算模式。在 算例裡考慮兩個簡化的海洋環境模型,以所建立的匹配聲場處理法進行地音參數 反算,最後除了低靈敏度的地音參數 (如底質密度) 不易反算出正確值外,其他 未知的地音參數皆能正確的反算出。 |
英文摘要 | The goal of this paper is to establish a Matched-Field-Processing scheme, which is based on the concept of Combinatorial Optimization Problem, for effectively estimating acoustic properties of ocean bottoms. The inversion procedure constitutes two parts, namely optimization algorithm and acoustic propagation computations. The Simulated Annealing Algorithm is adopted as the optimization algorithm, and SAFARI code is used as the acoustic propagation program. Two scenarios of ocean model are used as test cases. The bottom properties are estimated by the Matched-Field-Processing scheme established in this paper. Except for the environmental parameters of low sensitivity (e.g. density of seabed), the acoustic properties of ocean bottom in each scenario are accurately estimated. |
本系統中英文摘要資訊取自各篇刊載內容。