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相关概念视频

Design Example: Aggregate Gradation01:24

Design Example: Aggregate Gradation

149
The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
149
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

101
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
101
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

122
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
122
Design Example: Dimensioning of Concrete Masonry Construction01:13

Design Example: Dimensioning of Concrete Masonry Construction

139
For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
The site engineer has laid out a plan for the storeroom with external dimensions of twelve feet in length and...
139
Multimachine Stability01:25

Multimachine Stability

230
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
230
Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

105
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
105

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相关实验视频

Updated: Sep 13, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
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使用蒙特卡洛模拟技术评估重复性建筑项目的规划效率.

Ahmed M Ebid1, Taher Ammar2, Ibrahim Mahdi3

  • 1Department of Structural Engineering and Construction Management, Future University in Egypt, New Cairo, Egypt. ahmed.abdelkhaleq@fue.edu.eg.

Scientific reports
|July 28, 2025
PubMed
概括

本研究介绍了蒙特卡洛模拟框架,用于高效的高速公路建设规划. 数据驱动的方法显著改善了项目调度和资源管理,优于传统方法.

关键词:
建设时间表的编制.高速公路建设项目蒙特卡洛模拟的蒙特卡洛模拟规划效率 规划效率 规划效率 规划效率重复性项目是重复性的项目.资源配置优化资源分配优化随机模型的建模不确定性管理 不确定性管理

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科学领域:

  • 建设管理建设管理.
  • 运营研究 运营研究
  • 土木工程 土木工程是指土木工程.

背景情况:

  • 高效的规划和调度对于重复的建筑项目,特别是高速公路基础设施至关重要.
  • 传统的方法在大型项目中与不确定性和资源波动作斗争.

研究的目的:

  • 开发和验证基于蒙特卡洛模拟的框架,以提高重复性的建筑项目规划.
  • 系统地建模活动优先级,资源配置和时间表优化.

主要方法:

  • 使用蒙特卡洛模拟来模拟项目参数中的不确定性.
  • 在不同的条件下分析了18个假设项目案例.
  • 通过埃及的三个现实高速公路项目验证了框架.

主要成果:

  • 与传统方法相比,在项目持续时间和资源利用效率方面取得了显著的改进.
  • 在现实世界高速公路项目中实现了高达80%的效率提升.
  • 该框架有效地减轻不确定性,并优化项目结果.

结论:

  • 拟议的蒙特卡洛模拟框架为重复的建筑规划提供了一个数据驱动的,可适应的解决方案.
  • 为规划人员提供了一个强大的工具,以提高效率和降低风险.
  • 证实了高速公路基础设施项目的实际适用性和重大益处.