相关实验视频
Updated: May 9, 2025

06:10
Using Generative Art to Convey Past and Future Climate Transitions
Published on: March 31, 2023
816
基于机器学习的南中国海人为I的预测
Jinxiao Hou1, Tong Zhang2, Yanyun Wang3
1Xi'an Accelerator Mass Spectrometry Center, State Key Laboratory of Loess Science, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Journal of environmental radioactivity
|May 3, 2025
概括
机器学习模型预测了放射性-129 (129I) 在海洋环境中的分散. 盐度,温度和水深显著影响129I水平,有助于放射性风险评估.
科学领域:
- 环境科学 环境科学
- 核化学 核化学 核化学
- 机器学习 机器学习
背景情况:
- 核电站活动的增加需要了解海洋放射性物质的分散.
- 由于其特性,-129 (129I) 是人类对海洋放射性污染的关键标记物.
- 准确预测放射性核素的传播对于放射性风险评估和应急响应至关重要.
研究的目的:
- 开发和评估机器学习模型,用于预测人为-129 (129I) 在海洋环境中的分散.
- 确定影响129I在海水中的分布的关键环境参数.
- 评估随机森林和支持矢量机模型的预测性能.
主要方法:
- 在南中国海西北部收集海水样本进行129I和127I测量.
- 开发了随机森林和支持矢量机器模型,使用测量的同位素数据.
- 使用斯皮尔曼分析来确定环境因素 (深度,温度,盐度) 对129I水平的影响.
主要成果:
- 盐度,温度和水深被确定为影响129I水平的主要环境参数.
- 盐度被发现是影响模型预测的最重要的参数.
- 两种机器学习模型都显示出高预测准确度 (R2>0.83),随机森林模型略高于支持矢量机器模型.
结论:
- 机器学习模型提供了一种可靠的方法来预测边缘海洋中可溶性人为放射性核酸分散的可靠方法.
- 开发的模型为放射性风险评估和核污染事件的紧急管理提供了宝贵的技术支持.
- 该研究强调了环境因素,特别是盐度在了解海洋生态系统中放射性核素运输方面的重要性.
相关概念视频
Threats to Biodiversity
21.9K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
21.9K
Global Climate Change
23.9K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
23.9K
What is Climate?
18.1K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
18.1K
Biodiversity and Human Values
13.0K
Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
13.0K
Ecological Disturbance
16.8K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
16.8K
Habitat Fragmentation
17.3K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
17.3K

