基于Hadoop的海量交通數(shù)據(jù)研究與應用
[Abstract]:In order to better manage the urban road traffic system, people have established the intelligent transportation system. The traffic information is collected and the state of the road is monitored by installing various detection sensors on the city road. However, with the complexity of the road network system and the rapid increase of urban vehicle ownership, the intelligent transportation system has collected a large amount of low-value density information. How to quickly and accurately excavate the useful information to solve the urban road problem in these large-scale low-value data is the goal that the researcher pursues diligently now. In traffic problems, the discrimination and prediction of traffic congestion is an important field. In the past, the method of judging traffic congestion was to determine the normal congestion points by calculating traffic parameters and other data, and then to solve the congestion problem by planning roads and controlling traffic lights. The road state and the real-time command of the police are not taken into account. Moreover, with the increase of data, the geometric increase of computation cost a lot of time and lose the real time of traffic prediction. In addition, the division of traffic district is the middle level of traffic travel law, and reasonable division is helpful to establish effective traffic management measures. Based on the actual data of Hangzhou traffic system, including microwave detection data, floating vehicle GPS data, video surveillance data, road network data and so on, combined with the advantages of Hadoop platform for massive data processing, Do the following innovative research on traffic data mining applications: 1. In this paper, the concept of traffic jam point and the distributed detection algorithm are proposed and solved for the first time. It plays an important role in guiding the real-time optimization of limited police force, and it is essentially different from traffic state classification. By introducing historical congestion probability, the concept of "anomaly" and the distributed computing model are defined for the first time. Furthermore, the accuracy of real-time early warning is improved by "cumulative anomaly" effect. The algorithm has "self-learning" property, which is embodied in the continuous updating of historical congestion probability. Even if traffic organization and road infrastructure change, the applicability of the method will not be greatly affected by .2. A fast distributed density clustering algorithm based on mass traffic data is proposed, which avoids the influence of input parameters of general density clustering algorithm on data clustering, and improves the computational efficiency of density clustering algorithm in the face of big data set. The point density and the distance between points are calculated by the distributed method to cluster the points quickly. It provides the decision basis for the division of traffic district.
【學位授予單位】:浙江工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:U495
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