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相关概念视频

Buoyancy and Stability for Submerged and Floating Bodies01:11

Buoyancy and Stability for Submerged and Floating Bodies

In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
Rapidly Varying Flow01:24

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Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...

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RiSID:河流表面图像数据集用于浮动巨型塑料碎片的实例细分.

Tomoya Kataoka1,2, Takushi Yoshida3, Natsuki Yamamoto3

  • 1Department of Civil & Environmental Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, 790-8577, Japan.

Data in brief
|November 10, 2025
PubMed
概括

研究人员开发了一套新的河流图像数据集,以追踪漂浮的巨型塑料碎片. 这项技术有助于了解从陆地到海洋的塑料运输,这对保护海洋生态系统至关重要.

关键词:
漂浮的巨型塑料碎片可以漂浮.实例细分是指实例的细分.在MS COCOCO中使用.河流的表面 河流的表面

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科学领域:

  • 环境科学 环境科学
  • 计算机视觉 计算机视觉
  • 数据科学数据科学数据科学

背景情况:

  • 河流是巨型塑料垃圾的重要导管,对海洋生态系统构成威胁.
  • 精确量化漂浮的河流巨型塑料对于追踪陆地污染源至关重要.

研究的目的:

  • 引入河流表面图像数据集 (RiSID) 用于巨型塑料碎片的监测.
  • 促进开发先进的计算机视觉模型来检测和量化漂浮的河流塑料.

主要方法:

  • 在日本11个地点收集了7356张高流河面图像.
  • 在多个类别中生成了浮动宏观塑料碎片的像素分段注释.
  • 格式化注释使用微软在深度学习应用程序上文中的共同对象 (MS COCO) 标准.

主要成果:

  • RiSID数据集为漂浮的巨型塑料碎片提供了全面的注释.
  • 数据集的结构使得能够探索各种深度学习模型的性能,以检测碎片.
  • 这些数据支持对监测河流塑料污染的有效方法的研究.

结论:

  • RiSID是推进自动监测河流中浮动巨型塑料垃圾研究的宝贵资源.
  • 该数据集将有助于开发更准确的模型来评估塑料运输动态.
  • 改进的监测技术对于减轻河流塑料对海洋环境的影响至关重要.