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Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
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In signal processing, signals are classified based on various characteristics: continuous-time versus discrete-time, periodic versus aperiodic, analog versus digital, and causal versus noncausal. Each category highlights distinct properties crucial for understanding and manipulating signals.
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相关实验视频

Updated: Mar 12, 2026

Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster Nephrops norvegicus
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使用深度学习,光谱图交叉相关性和非线性贝叶斯反转来检测和定位北大西洋真.

Romina A S Gehrmann1, Oliver S Kirsebom2, Bruno Padovese3

  • 1Defence Research and Development Canada, Dartmouth, Nova Scotia, Canada.

The Journal of the Acoustical Society of America
|March 11, 2026
PubMed
概括

我们开发了一种新的方法来检测和定位北大西洋真 (NARW) 呼叫,使用水下声音. 这种被动声学监控技术有助于保护这个危物种免受人类威胁.

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A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants
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A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants
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科学领域:

  • 海洋生物学 海洋生物学
  • 声学 声学 在声学方面
  • 保护技术 保护技术

背景情况:

  • 北大西洋正 (NARW) 处于极度危状态,面临船只撞击和渔具的威胁.
  • 被动声学监测 (PAM) 对于跟踪海洋哺乳动物和实施保护战略至关重要.
  • 有效地检测和定位NARW声调对于减轻人类造成的风险至关重要.

研究的目的:

  • 为检测和定位北大西洋真 (NARW) 呼叫提供一个强大的处理程序.
  • 为了证明三步被动声学监测分析作为NARW保护缓解工具的有效性.
  • 增强声学调查所提供的信息,以有效管理.

主要方法:

  • 利用一个sonobuoy网格被动记录NARW电话 (呼叫和吟) 在圣劳伦斯湾南部.
  • 采用深度学习模型用于初始NARW呼叫检测,适用于sonobuoy数据集.
  • 应用光谱图相关性用于电话关联和到达时间差 (TDOA) 估计在sonobuoys.
  • 执行非线性贝叶斯反转用于呼叫本地化,包括不确定性估计.

主要成果:

  • 通过使用开发的三步分析,成功检测并定位了北大西洋右 (NARW) 的呼叫.
  • 这种方法在sonobuoy电网内和附近的电话中被证明有效.
  • 分析提供了对通话源头头寸的现实不确定性估计.
  • 与传统的视觉调查相比,声学数据增强了信息.

结论:

  • 提出的处理程序是检测和定位北大西洋真 (NARW) 发声的有效工具.
  • 这种被动声学监测方法显著支持危鱼的保护和管理工作.
  • 该方法提供了改进的空间和时间信息,以减轻人类对NARW人口的影响.