深層学習手法を用いた近接場パルス信号による層状海底の音響地球物理学的推定
Yuxuan Ma1,2, Li He1, Zhaohui Peng1,2
1State Key Laboratory of Acoustics and Marine Information, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
The Journal of the Acoustical Society of America
|January 21, 2026
まとめ
本研究では、海底音響反射の解析による音響地球物理学的推定のための深層学習手法を導入する。クロスViTモデルは、海底の層構造とパラメータを正確に取得し、他の深層学習アプローチを上回る性能を示す。
科学分野:
- 海洋地球物理学
- 音響海洋学
- 深層学習の応用
背景:
- 海底音響反射係数は、周波数依存および角度依存の振動を示します。
- これらの振動は、海底の層構造と音響地球物理学的特性に本質的に関連しています。
研究 の 目的:
- 海底の層構造と音響地球物理学的パラメータが音響反射パターンに与える影響を調査する。
- 海底特性評価のための深層学習ベースの音響地球物理学的推定手法を開発し、検証する。
主な方法:
- 底面反射係数(BRC)を解析するための数値シミュレーション。
- 自己注意機構と相互注意機構を備えたクロスViT深層ニューラルネットワークの実装。
- 音響地球物理学的パラメータ推定のための勾配正規化(GradNorm)を用いたマルチタスク学習戦略。
主要な成果:
- クロスViTモデルは、BRC特徴量と音響地球物理学的パラメータ間の複雑なマッピングを効果的に学習します。
- 提案された深層学習手法は、CNNおよびトランスフォーマーモデルと比較して、優れた性能とノイズ耐性を示します。
- 南シナ海からの実世界の音響推定データを用いた成功裏の検証。
結論:
- 深層学習、特にクロスViTアーキテクチャは、海底の音響地球物理学的推定のための強力なツールを提供します。
- 開発された手法は、音響反射データから近接場の海底の層構造と音響地球物理学的パラメータを正確に取得します。
- このアプローチは、複雑な海底環境の理解と特性評価を進歩させます。
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