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Mending Defective Information and Analysis on Spatial-Temporal Distribution of Regional Traffic Flow

Author: WenXiaoYue
Tutor: DongHongZhao
School: Zhejiang University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Fix incomplete information Spatial and temporal distribution Neural Network Traffic flow theory Soliton
CLC: U491.112
Type: Master's thesis
Year: 2009
Downloads: 111
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Abstract


Traffic electromechanical testing system is an important part of intelligent transportation systems , traffic flow information obtained collected for urban transport planning and traffic management to provide important basic information , traffic guidance system is implemented effectively guaranteed. However, due to weather , construction damage , line fault , error handling , no detectors and other reasons , traffic flow information collection will be incomplete and missing cases in which traffic flow information incomplete. In order to obtain a complete traffic flow information , in-depth exploration of traffic flow distribution in urgent need of repair incomplete information on these technical methods . Based on the analysis of traffic flow information incomplete information can be divided into parts and incomplete information is completely crippled . Incomplete repair some of the information presented SARBF neural network fitting methods , first in spatial database through self- correlation analysis , and information to identify strong correlation incomplete intersection intersection object, and then select the database from the properties of the participating repair junctions historical data to participate in neural network training . Right information is completely crippled repair using Lagrange interpolation, interpolation prior to participating in the restoration of the intersection of their spatial distribution analysis and coding , take this encoding as interpolation nodes. Area using the above method to obtain the complete flow data , the use of B-spline surface fitting method of spatial and temporal distribution of these data fit , we found abrupt fluctuations , through the analysis of traffic flow models have been described soliton equations of motion , verify urban traffic flow solitary waves exist , and proposed the concept of positive and negative solitary waves . This has induced traffic management departments to formulate plans to provide a new way to help achieve peak traffic flow suppression of macro-control services Pinggu full use of road resources . The research results obtained in this paper major science and technology projects in Zhejiang province \to verify the theoretical results obtained Institute project and its feasibility and accuracy.

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CLC: > Transportation > Road transport > Technical management of traffic engineering and road transport > Traffic engineering and traffic management > Traffic Survey and Planning > Traffic survey > Traffic flow
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