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相关概念视频

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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Distributed Loads: Problem Solving01:21

Distributed Loads: Problem Solving

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Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
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Internal Loadings in Structural Members: Problem Solving01:28

Internal Loadings in Structural Members: Problem Solving

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When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
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Design Consideration01:22

Design Consideration

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Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
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Stresses under Combined Loadings01:23

Stresses under Combined Loadings

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When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
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Response Surface Methodology01:16

Response Surface Methodology

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Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:
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Updated: Jun 5, 2025

An R-Based Landscape Validation of a Competing Risk Model
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基于线性编程可变重量云模型的崩风险评估.

Xiaoyi Zhou1, Ke Hu1, Tingqiang Zhou1

  • 1Department of Civil Engineering, Chongqing Three Gorges University, Wanzhou, Chongqing, China.

PloS one
|December 16, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种用于评估山区地质崩塌风险的新方法. 新方法通过整合线性编程和云模型来提高准确性,识别了65%的分析崩是非常危险的.

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科学领域:

  • 地质工程是地质工程.
  • 灾害风险评估 灾害风险评估
  • 地质技术工程 地质技术工程

背景情况:

  • 崩塌风险评估对于管理山区地质灾害至关重要.
  • 传统的崩危险评估方法面临的局限性是由于指标分配的可变性和无法同时处理数据模两可和随机性.
  • 现有的关于崩危险评估的研究是有限的,阻碍了风险管理的进步.

研究的目的:

  • 通过结合线性编程理论和云模型,开发一个先进的崩风险评估模型.
  • 提高崩风险评估的准确性和可靠性,以预防和控制地质灾害.
  • 解决传统指标分配和综合评估方法的局限性.

主要方法:

  • 使用改进的分析层次过程,权方法和变化系数方法确定评估指数的权重区间.
  • 采用线性编程算法,为每个崩样本选择特定的重量,以最大限度地提高间隔内的风险.
  • 建立基于云模型的全面评估模型,以确定崩的风险水平.

主要成果:

  • 开发的方法应用于G4217温chuan-lixian部分的20个崩样本.
  • 评估结果显示,13个样本 (65%) 是极度危险的,2个 (10%) 是高度危险的,4个 (20%) 是中度危险的,1个 (5%) 是低危险的.
  • 该方法的可靠性和合理性通过与其他评估技术和现场调查数据进行比较来验证,显示了与实际条件更好的协调.

结论:

  • 综合线性编程和云模型方法为崩风险评估提供了更可靠和更合理的方法.
  • 这种先进的模型有效地处理与指标数据固有的模糊性和随机性,优于传统方法.
  • 这些发现为加强山区地质灾害预防和控制战略提供了宝贵的工具.