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相关概念视频

Applications of GIS: Disaster Management and Emergency Response01:29

Applications of GIS: Disaster Management and Emergency Response

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Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
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Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

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Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
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Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

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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...
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Precipitation Gravimetry01:03

Precipitation Gravimetry

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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...
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Precipitation Processes01:12

Precipitation Processes

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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...
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Updated: Jun 27, 2025

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基于大数据的台风灾害紧急预报方法.

Hong Huo1, Yuqiu Chen1, Shiying Wang1,2

  • 1School of Management, Harbin University of Commerce, Harbin, China.

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概括
此摘要是机器生成的。

这项研究引入了一个神经网络模型,使用大数据预测台风灾害趋势,强度和路径. 该模型显示出有希望的结果,特别是对于强烈的热带风暴,具有准确的路径预测.

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科学领域:

  • 气象学和大气科学 气象学和大气科学
  • 数据科学和人工智能数据科学和人工智能
  • 灾害管理 灾害管理

背景情况:

  • 台风是经常发生的自然灾害,具有重大影响,经常引发次要灾害.
  • 准确预测台风强度,位置和相关灾害趋势对于缓解和准备至关重要.

研究的目的:

  • 开发和评估基于神经网络的预测模型,用于台风灾害趋势.
  • 用先进的计算技术预测台风的强度,位置和灾难轨迹.

主要方法:

  • 利用神经网络,特别是计算遗忘,更新和预测输出门.
  • 采用大数据概念和Python技术收集和处理台风数据.
  • 通过对收集的台风数据集的实证分析来验证模型性能.

主要成果:

  • 该模型表现出很好的适应性,特别是在强烈的热带风暴中.
  • 预测准确性需要改善热带低谷,台风和强台风.
  • 该模型在预测台风中心度和经度时取得了小的平均误差,预测的路径与实际轨迹密切匹配.

结论:

  • 拟议的神经网络模型显示了预测台风灾害趋势和轨迹的潜力.
  • 该模型的准确性对于强烈的台风是有希望的,但对于较弱的系统需要增强.
  • 建议进行进一步的研究,以完善该模型,以便在所有台风类别中改进预测.