.png){kind=icon}
返回
Sampling methods for summarizing unordered vehicle-to-vehicle data streams
.png){kind=icon}
PRE
AI
DOI：10.1016/j.trc.2011.11.009.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
In the vehicle-to-vehicle (V2V) communication environment, vehicles interchange traffic data with each other. Because of the unbounded size of traffic data streams, sampling is used for summarization of traffic data, instead of storing the original data directly, for estimating traffic characteristics such as speed in the next step. All existing sampling methods assume that data arrivals are in the increasing timestamp order. However, this assumption may not be true in the V2V environment due to multiple data sources, transmission delays and different ways of dissemination. This disordered issue is explored in two ways in this paper. First, the traditional sampling methods for ordered streams are extended to be compatible with the disorder, especially the Unordered Extension of Exponentially Biased Reservoir Sampling (UEEBRS). Second, we propose a novel method, called the polynomially biased reservoir sampling (PBRS), to summarize unordered traffic data streams. Two measurements, the relative bias of speed and the cover rate of information obtained from the constructed summarizations, are used to assess performance of the extended methods and the novel way of comparing them with the classical methods. Preliminary simulation results show the proposed methods (UEEBRS and PBRS) reduce the relative bias of speed by about 10% with respect to the best reported result, while their cover rates of information are comparable at least to the others and are sufficiently high to support real-world applications. (C) 2011 Elsevier Ltd. All rights reserved.
Keyword:
Vehicle-to-vehicle environment
Unordered data stream
Summarization
Biased sampling
Traffic state estimation
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
7.9
论文数:
4.9K
被引数:
3.2W
机构
引用论文
.png){kind=icon}
分享收藏
分享收藏Increased medial orbitofrontal [18F]fluorodopa uptake in Parkinsonian impulse control disorders
PREAI
分享收藏
查看更多内容