相关实验视频
Updated: Sep 13, 2025

10:32
Image-based Lagrangian Particle Tracking in Bed-load Experiments
Published on: July 20, 2017
9.1K
基于运动称重和机器学习的铁路交通特征数据:葡萄牙的案例研究
Idilson A Nhamage1, Cláudio S Horas1, José A Campos E Matos2
1CONSTRUCT-LESE, University of Porto, Faculty of Engineering, 4200-465 Porto, Portugal.
Data in brief
|July 29, 2025
概括
一种自动化的机器学习方法从权衡数据中对列车类型进行分类,这对于评估老化的金属铁路桥梁至关重要. 该方法有助于结构完整性评估和网络容量规划.
科学领域:
- 工程 工程师 工程师 工程师
- 计算机科学 计算机科学
- 运输科学 运输科学
背景情况:
- 20世纪的金属铁路桥梁正在老化,需要准确的负载数据来确保结构完整性.
- 疲劳是一个主要问题,需要精确了解服务铁路负载,以防止过早更换或不必要的加强.
- 当前的交通数据对于评估过去和未来的场景至关重要,但永久称重系统的实施是具有挑战性的.
研究的目的:
- 开发和验证一种自动机器学习 (ML) 方法,用于使用权衡移动 (WIM) 数据对列车类型进行分类.
- 为了解决在大型WIM数据集中识别火车类型的手动和繁的任务.
- 为结构完整性评估和更广泛的铁路部门考虑提供关键数据.
主要方法:
- 在葡萄牙的阿尔卡塞尔多萨尔大桥上安装了运动称量 (WIM) 系统,以收集实时列车数据.
- 使用自动机器学习 (ML) 算法对收集的WIM数据进行后处理,用于列车分类.
- 通过WIM系统捕获的火车负载,轴间距和火车速度的分析.
主要成果:
- 成功实施了一种自动化的ML方法,用于从WIM数据中分类列车类型.
- 生成含有列车机密信息的有价值数据集,包括负载,几何和速度.
- 证明用于结构评估的自动列车分类的可行性.
结论:
- 从WIM数据中基于ML的自动列车分类对于评估老化的铁路桥梁是有效的.
- 这种方法为结构完整性,疲劳分析和铁路网络管理提供了必要的数据.
- 该方法为具有相似交通特征的国家和国际背景提供了有价值的工具.
相关概念视频
Distance Measurements by Taping
100
Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
100
Mechanical Efficiency of Real Machines
864
The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
However, in reality, no machine can be truly ideal, and all of them experience some...
864
Absolute Motion Analysis- General Plane Motion
273
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
273
Distributed Loads
613
Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
613
Classification of Signals
896
In signal processing, signals are classified based on various characteristics: continuous-time versus discrete-time, periodic versus aperiodic, analog versus digital, and causal versus noncausal. Each category highlights distinct properties crucial for understanding and manipulating signals.
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
896
Distributed Loads: Problem Solving
738
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...
738

