Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Buoyancy01:12

Buoyancy

8.9K
When an object is placed in a fluid, it either floats or sinks. All objects in a fluid experience a buoyant force. For example, a metal ball sinks, while a rubber ball floats. Similarly, a submarine can sink and float by adjusting its buoyancy.  The concept of buoyancy raises several interesting questions. For instance, where does this buoyant force come from? How much buoyant force is required to make an object sink or float? Do objects that sink get any support at all from the...
8.9K
Buoyancy and Stability for Submerged and Floating Bodies01:11

Buoyancy and Stability for Submerged and Floating Bodies

3.6K
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...
3.6K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Which neoadjuvant chemotherapy regimen should be recommended for patients with advanced nasopharyngeal carcinoma?: A network meta-analysis.

Medicine·2018
Same author

Reassessment of the evolution of wheat chromosomes 4A, 5A, and 7B.

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·2018
Same author

Video Imprint.

IEEE transactions on pattern analysis and machine intelligence·2018
Same author

Molecular Characterization of Extended-Spectrum β-Lactamase-Producing Multidrug Resistant <i>Escherichia coli</i> From Swine in Northwest China.

Frontiers in microbiology·2018
Same author

GmBTB/POZ, a novel BTB/POZ domain-containing nuclear protein, positively regulates the response of soybean to Phytophthora sojae infection.

Molecular plant pathology·2018
Same author

Antioxidant and angiotensin I-converting enzyme inhibitory activities of Xuanwei ham before and after cooking and <i>in vitro</i> simulated gastrointestinal digestion.

Royal Society open science·2018

相关实验视频

Updated: May 6, 2026

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
10:56

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

Published on: March 6, 2014

12.5K

水下物体检测方法基于可学习查询回忆机制和轻量级适配器.

Xi Lin1, Xixia Huang1, Le Wang1

  • 1Institute of Logistics Science and Engineering, Shanghai Maritime University, Shanghai, People's Republic of China.

PloS one
|February 28, 2024
PubMed
概括

这项研究通过改进DETR以查询回忆机制和多尺度功能来增强水下物体检测,大大提高了在具有挑战性的海洋环境中的性能.

科学领域:

  • 海洋科学 海洋科学
  • 计算机视觉 计算机视觉 计算机视觉
  • 海洋学 海洋学 海洋学

背景情况:

  • 水下物体检测对于水产养殖,环境监测和海洋科学至关重要.
  • 现有的深度学习模型难以应对水下图像挑战,例如噪音,模糊和多尺度对象.

研究的目的:

  • 调整DETR (检测变压器) 模型以改善水下物体检测.
  • 解决目前用于检测小,不规则和杂的水下目标的算法的局限性.

主要方法:

  • 引入了一个可学习的查询回忆机制,以减少噪音影响.
  • 在编码和解码中开发了一种轻量级适配器,用于多尺度的特征提取.
  • 优化边界框回归使用平滑L1和CIoU损失的组合.

主要成果:

  • 提出的方法在水下物体检测方面取得了显著的改进.
  • 在RUOD数据集上与最先进的方法进行验证的有效性.
  • 在处理噪音,模糊和多尺度物体方面实现了卓越的性能.

结论:

  • 增强的DETR模型有效地解决了水下物体检测方面的挑战.

更多相关视频

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

9.3K
Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster Nephrops norvegicus
05:57

Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster Nephrops norvegicus

Published on: April 8, 2019

6.8K

相关实验视频

Last Updated: May 6, 2026

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish
10:56

Long-term Behavioral Tracking of Freely Swimming Weakly Electric Fish

Published on: March 6, 2014

12.5K
Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

Published on: November 20, 2017

9.3K
Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster Nephrops norvegicus
05:57

Long-term Video Tracking of Cohoused Aquatic Animals: A Case Study of the Daily Locomotor Activity of the Norway Lobster Nephrops norvegicus

Published on: April 8, 2019

6.8K
  • 拟议的修改为海洋视觉任务提供了可靠的解决方案.
  • 这项工作推进了深度学习在水下成像应用中的功能.