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相关概念视频

Multi-input and Multi-variable systems01:22

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Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
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Force Classification01:22

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Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in the physical world. Forces can be classified based on their origin, type, and direction of action.
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
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In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
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Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
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Transformers in Distribution System01:27

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Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
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Hydraulic Jump: Problem Solving01:16

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To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
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相关实验视频

Updated: Jul 10, 2025

Trajectory Data Analyses for Pedestrian Space-time Activity Study
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基于使用多源数据的编码器-解码器框架预测 jaywalker-车辆冲突.

Ziqian Zhang1, Haojie Li1, Gang Ren1

  • 1School of Transportation, Southeast University, China; Jiangsu Key Laboratory of Urban ITS, China; Jiangsu Province Collaborative Innovation Center of Modern Urban Traffic Technologies, China.

Accident; analysis and prevention
|November 26, 2023
PubMed
概括
此摘要是机器生成的。

这项研究开发了一个新的AI模型来预测 jaywalker-车辆冲突的严重性. 该模型准确预测潜在的危险,提高行人和司机的道路安全.

关键词:
预测冲突,预测冲突.编码器-解码器框架杰伊沃克与车辆发生冲突没有过境设施的中区.

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科学领域:

  • 道路安全工程工程 道路安全工程
  • 交通运输中的人工智能
  • 交通冲突分析分析

背景情况:

  • 在中国,在没有指定十字路口的中区地区, jaywalker-vehicle (J-V) 冲突频繁且危险.
  • 道路行走的不可预测性需要预测模型,以便及时向道路使用者发出警告.

研究的目的:

  • 引入一种新的编码-解码框架,用于使用多源数据预测J-V冲突严重程度.
  • 通过通过准确的严重程度预测提供冲突前警告来提高道路安全.

主要方法:

  • 开发了一个新的编码器解码器框架,包含三个编码器:J-V交互 (Bi-LSTM), jaywalker运动 (Bi-LSTM) 和背景信息 (MLP).
  • 这些编码器的特征被连接并输入到冲突严重性解码器 (MLP) 中进行预测.
  • 一个案例研究使用来自中国南京三个中区的视频数据进行.

主要成果:

  • 拟议的编码器-解码器模型在预测指标方面表现优于经典模型.
  • 整合背景信息显著改善了模型的性能,在四个评估指标中平均提高了24.291%.
  • 可转移性分析显示,当包括40%-50%来自新位置的数据时,预测指标稳定在80%至95%之间.

结论:

  • 开发的编码器解码器模型为预测J-V冲突严重程度提供了强大的解决方案.
  • 背景信息是提高JV冲突预测模型准确性的关键因素.
  • 该模型表现出良好的可转移性,这表明其在提高路过安全性方面具有广泛应用的潜力.