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相关概念视频

Force Classification01:22

Force Classification

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Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in the physical world. Forces can be classified based on their origin, type, and direction of action.
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
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Absorption of Radiation01:05

Absorption of Radiation

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The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
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Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

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In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
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Mechanism of heat transfer01:19

Mechanism of heat transfer

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Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
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Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Classification of Systems-I01:26

Classification of Systems-I

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Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
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相关实验视频

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基于深度转移学习的卷积神经网络框架,用于使用人类服装图像进行空气温度分类.

Maqsood Ahmed1, Xiang Zhang2,3, Yonglin Shen4

  • 1School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China.

Scientific reports
|December 31, 2024
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概括

这项研究引入了一个使用转移学习用于从服装图像识别天气的新框架. DenseNet121在分类空气温度水平方面实现了98.13%的准确性,改善了天气预报.

关键词:
空气温度 空气温度 空气温度分类 分类 分类 分类.深度转移学习是指深度转移学习.人类的衣服是人类的衣服.

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科学领域:

  • 计算机视觉 计算机视觉
  • 人工智能的人工智能
  • 环境科学 环境科学

背景情况:

  • 天气识别对日常生活至关重要,影响预测,监测和能源.
  • 现有的基于图像的天气识别方法缺乏准确性,并覆盖有限的现象.
  • 从视觉线索准确地分类空气温度是一个未经探索的领域.

研究的目的:

  • 开发和评估一种转移学习卷积神经网络 (CNN) 框架,用于使用人类服装图像对空气温度水平进行分类.
  • 评估各种深度转移学习模型的性能,包括DeepLabV3 Plus,BigTransfer (BiT),视觉转换器 (ViT),ResNet101,VGG16,VGG19和DenseNet121. 这三种模型.
  • 使用梯度加权类激活映射 (Grad-CAM) 验证模型的可解释性.

主要方法:

  • 一个新的人类服装图像数据集 (HCID) 包含高和低气温类别的10,000张图像.
  • 采用深度转移学习方法的CNN框架用于图像分类.
  • 模型被严格评估,使用准确度,精度,F1得分,回忆,AUC-ROC和混矩阵等指标.

主要成果:

  • DenseNet121表现出卓越的性能,在分类空气温度水平方面达到98.13%的准确性.
  • 所有评估的模型在区分高温和低温条件方面都显示出有希望的结果.
  • 格拉德-CAM分析提供了对驱动分类决策的视觉特征的见解.

结论:

  • 拟议的转移学习CNN框架有效地从人类服装图像中对空气温度水平进行分类.
  • DenseNet121为此任务提供了一个高度准确的解决方案,其性能优于其他测试的模型.
  • 这项研究为改善天气预报和环境监测系统提供了有价值的工具.