集群自动化车辆开发的高速公路切入场景,考虑到数据维度和不平衡
Penghui Li1, Qianru Dong2, Xiangjun Zhao2
1School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China; State Key Laboratory of Intelligent Vehicle Safety Technology, China Automotive Engineering Research Institute Co., Ltd., Chongqing 401122, China.
Accident; analysis and prevention
|June 29, 2025
概括
本研究引入了一种新的集群算法,用于创建自动驾驶汽车的代表性驾驶场景. 该方法有效地处理复杂的数据,识别罕见但至关重要的场景,以提高安全和发展.
科学领域:
- 自动化车辆开发自动化车辆开发
- 机器学习用于运输.
- 数据挖掘和集群技术的数据采集和集群技术.
背景情况:
- 代表性驾驶场景对于自动驾驶汽车 (AV) 功能定义和算法开发至关重要.
- 现有的集群方法面临着高维和不平衡的自然主义驾驶数据的挑战,导致偏见的场景表示.
- 准确的场景生成对于强大的AV测试和验证至关重要.
研究的目的:
- 提出和实施一种新的双层,自我适应,基于多个原型的竞争性学习算法,用于集群驾驶场景.
- 解决数据维度的局限性和自然驾驶数据集群中的不平衡问题.
- 为AV发展生成一套全面的代表性高速公路切入场景.
主要方法:
- 使用K-medoids集群与动态时间扭曲 (DTW) 距离用于多维,混合类型变量 (环境,静态,动态).
- 经过转换后,用于离散变量的一次热编码,用于连续变量和时间序列变量的K-medoids.
- 实施了双层方法:K-medoids用于初始集群和多原型竞争性学习用于精细集群,确保少数集群代表性和适应性集群数量的确定.
主要成果:
- 从2415个自然驾驶数据段生成了11个代表性的高速公路切入场景.
- 与传统方法相比,拟议的算法显示出优越的集群良性.
- 确定了四个常见的切入场景和七个罕见但关键的场景 (例如,夜间,恶劣天气,商用车辆).
结论:
- 这种新的集群算法有效地克服了自然驾驶数据中的维度和不平衡问题.
- 确定的场景,包括罕见事件,为强大的自动化车辆开发提供了宝贵的见解.
- 该方法显示了广泛应用的巨大潜力,用于为自动驾驶汽车生成多样化和代表性的驾驶场景.
相关概念视频
Collisions in Multiple Dimensions: Problem Solving
4.4K
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.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
4.4K
Collisions in Multiple Dimensions: Introduction
5.6K
It is far more common for collisions to occur in two dimensions; that is, the initial velocity vectors are neither parallel nor antiparallel to each other. Let's see what complications arise from this. The first idea is that momentum is a vector. Like all vectors, it can be expressed as a sum of perpendicular components (usually, though not always, an x-component and a y-component, and a z-component if necessary). Thus, when the statement of conservation of momentum is written for a...
5.6K
Cluster Sampling Method
12.8K
Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest.
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
12.8K
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
106
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...
106
Distributed Loads: Problem Solving
743
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...
743
Distribution Reliability and Automation
167
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
167


