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

Precipitation Gravimetry01:03

Precipitation Gravimetry

3.8K
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...
3.8K
Gravimetry: Overview01:05

Gravimetry: Overview

3.6K
Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
3.6K
Global Climate Change01:50

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
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

1.5K
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...
1.5K
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

288
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
288

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

In Vivo Wound Healing Activity of <i>Abrus cantoniensis</i> Extract.

Evidence-based complementary and alternative medicine : eCAM·2017
Same author

Gigantol from Dendrobium chrysotoxum Lindl. binds and inhibits aldose reductase gene to exert its anti-cataract activity: An in vitro mechanistic study.

Journal of ethnopharmacology·2017
Same author

[High-risk factors and clinical characteristics of massive pulmonary hemorrhage in infants with extremely low birth weight].

Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics·2017
Same author

Liver X receptor agonist T0901317 reverses resistance of A549 human lung cancer cells to EGFR-TKI treatment.

FEBS open bio·2017
Same author

Naked eye plasmonic indicator with multi-responsive polymer brush as signal transducer and amplifier.

Nanoscale·2017
Same author

Graphene oxide adsorbent based dispersive solid phase extraction coupled with multi-pretreatment clean-up for analysis of trace aflatoxins in traditional proprietary Chinese medicines.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences·2017
Same journal

A tri-axis optomechanical accelerometer with plasmonic MIM waveguide and structural direction-dependent optical signatures.

Scientific reports·2026
Same journal

Holographic leaky-wave antennas with independently controlled multiple counter-rotating vortex beams.

Scientific reports·2026
Same journal

Differential associations of longitudinal hearing and vision trajectories with dementia and mild cognitive impairment in older adults.

Scientific reports·2026
Same journal

Abdominal obesity and leisure-time sedentary behavior in relation to gastroesophageal reflux disease risk: a prospective cohort study from the UK Biobank.

Scientific reports·2026
Same journal

Effect of nitrogen-rich COF incorporation on the structure and separation performance of polyamide nanofiltration membranes.

Scientific reports·2026
Same journal

Withanolide A inhibits hIAPP aggregation: An In silico, biophysical, and drosophila-based In vivo validation.

Scientific reports·2026
查看所有相关文章

相关实验视频

Updated: May 7, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

7.7K

基于CEEMDAN-GRU算法的短期降雨预测方法的研究.

Hua Xu1, Zongkai Guo2, Yu Cao3

  • 1School of Information Science and Control Engineering, Liaoning Petrochemical University, Fushun, 113005, China.

Scientific reports
|December 31, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种先进的降水预测模型,使用完整集体实证模式分解与自适应噪声 (CEEMDAN) 和门式反复单位 (GRU). CEEMDAN-GRU模型为短期降雨预测提供了更高的准确性和稳定性.

关键词:
塞曼丹 - 格鲁格鲁完整的合奏实证模式分解与适应性噪声.有门的经常性单位.降雨预测的预测.时间序列预测时间序列预测

更多相关视频

Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
09:05

Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites

Published on: June 24, 2019

7.8K
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
10:46

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

10.6K

相关实验视频

Last Updated: May 7, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

7.7K
Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
09:05

Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites

Published on: June 24, 2019

7.8K
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
10:46

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

10.6K

科学领域:

  • 环境科学环境科学
  • 数据科学是数据科学.
  • 气象学 天气学

背景情况:

  • 准确的降水预测对于灾害管理,城市规划和农业生产力至关重要.
  • 现有的时间序列模型在捕捉复杂,非线性降水模式方面面临挑战.

研究的目的:

  • 开发和评估一个改进的模型,用于短期降雨预测.
  • 通过使用先进的分解和循环神经网络技术,提高降水预测的准确性和稳定性.

主要方法:

  • 该研究结合了完整集体实证模式分解与自适应噪声 (CEEMDAN) 进行信号分解,以及时间序列模式识别的门式循环单元 (GRU).
  • 从2019年1月1日到2022年12月31日的降水数据被用于模型开发和验证.
  • 拟议的CEEMDAN-GRU模型与其他12个模型进行了比较,包括CEEMDAN-LSTM,EMD-GRU以及独立的GRU和LSTM.

主要成果:

  • 与基准模型相比,CEEMDAN-GRU模型在短期降水预测方面表现优越.
  • 关键性能指标包括R2为0.7915,平均绝对误差 (MAE) 为0.05382,平均平方误差 (MSE) 为0.09081.
  • 亚当优化器与自适应学习率降低的集成促进了增强的模型融合和预测可靠性.

结论:

  • CEEMDAN-GRU模型在短期降水预测准确性和稳定性方面取得了重大进展.
  • 这种混合方法有效地利用信号分解和深度学习来进行可靠的气象预报.
  • 这些发现支持CEEMDAN-GRU用于关键的依赖天气的作战规划.