相关实验视频

Updated: Jun 14, 2025

Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy

Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy

Published on: February 25, 2021

每日PM2.5度预测基于可变模态分解和深度学习,用于多地点气象因素的时间和空间融合

Xinrong Xie¹, Zhaocai Wang², Manli Xu¹

¹College of Information, Shanghai Ocean University, Hucheng Huan Road 999, Pudong Shanghai, Shanghai, 201306, P. R. China.

Environmental monitoring and assessment

|August 29, 2024

概括

准确的每日PM2.5度预测对于公共卫生至关重要. 一个新的混合模型,VCBA,使用时空数据融合和先进的深度学习技术,有效地预测PM2.5.

科学领域:

环境科学环境科学
大气化学大气化学
数据科学数据科学数据科学

背景情况:

空气污染,特别是细颗粒物 (PM2.5),对环境和公共健康构成重大风险.
准确的每日PM2.5度预测对于有效的环境管理和健康建议至关重要.
现有的预测模型经常与空气质量的复杂的时空动态作斗争.

研究的目的:

开发和评估一种新的混合模型,用于准确的每日PM2.5度预测.
使用时空融合方法整合多个地点的空气质量数据.
通过结合分解,深度学习和注意力机制来提高预测准确度.

主要方法:

使用了分解-预测-整合 (DPI) 框架.
变量模态分解 (VMD) 用于数据分解.
一个混合模型 (VCBA) 结合因果卷积神经网络 (因果CNN),双向长期短期记忆 (BiLSTM) 和注意力机制 (AM) 被用于预测.
进行了多个地点空气质量数据的时空融合.

主要成果:

VCBA模型在预测太原市每日PM2.5度方面表现出卓越的表现.
关键的绩效指标包括RMSE为2.556,MAE为1.998,R2为0.973. 这些指标包括RMSE为2.556,MAE为1.998,R2为0.973.
该模型有效地捕获了PM2.5数据中的复杂的时空模式.

结论:

拟议的VCBA模型在每日PM2.5预测准确度方面取得了重大进展.
混合方法提供了强大的时空建模能力,优于传统方法.
这项研究为精确的PM2.5预测提供了有效的解决方案,有助于环境和公共卫生工作.

关键词:

深度学习是一种深度学习.模态分解模态分解这是一个多因素的多因素.在PM2.5的度上,PM2.5的度很高.时空特征融合的空间时间特征融合.

更多相关视频

Design and Analysis for Fall Detection System Simplification

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions

Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions

Published on: January 7, 2019

相关概念视频

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...

Precipitation Processes

Precipitation Processes

The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...

Variation of Atmospheric Pressure

Variation of Atmospheric Pressure

Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...

Precipitation Gravimetry

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...

Temperature Measurement Sites

Temperature Measurement Sites

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...

Mean Absolute Deviation

Mean Absolute Deviation

The mean absolute deviation is also a measure of the variability of data in a sample. It is the absolute value of the average difference between the data values and the mean.
Let us consider a dataset containing the number of unsold cupcakes in five shops: 10, 15, 8, 7, and 10. Initially, calculate the sample mean. Then calculate the deviation, or the difference, between each data value and the mean. Next, the absolute values of these deviations are added and divided by the sample size to...