Statistical Analysis of Network Data

Statistical Analysis of Network Data

Author: Eric D. Kolaczyk

Publisher: Springer Science & Business Media

Published: 2009-04-20

Total Pages: 397

ISBN-13: 0387881468

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In recent years there has been an explosion of network data – that is, measu- ments that are either of or from a system conceptualized as a network – from se- ingly all corners of science. The combination of an increasingly pervasive interest in scienti c analysis at a systems level and the ever-growing capabilities for hi- throughput data collection in various elds has fueled this trend. Researchers from biology and bioinformatics to physics, from computer science to the information sciences, and from economics to sociology are more and more engaged in the c- lection and statistical analysis of data from a network-centric perspective. Accordingly, the contributions to statistical methods and modeling in this area have come from a similarly broad spectrum of areas, often independently of each other. Many books already have been written addressing network data and network problems in speci c individual disciplines. However, there is at present no single book that provides a modern treatment of a core body of knowledge for statistical analysis of network data that cuts across the various disciplines and is organized rather according to a statistical taxonomy of tasks and techniques. This book seeks to ll that gap and, as such, it aims to contribute to a growing trend in recent years to facilitate the exchange of knowledge across the pre-existing boundaries between those disciplines that play a role in what is coming to be called ‘network science.


A Gradient Approach for the O-D Matrix Adjustment Problem

A Gradient Approach for the O-D Matrix Adjustment Problem

Author: Heinz Spiess

Publisher:

Published: 1990

Total Pages: 11

ISBN-13:

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In the past, many different models using observed link volumes to estimate or adjust O-D matrices were proposed, but using them for real size networks is difficult because of the complexity of the computations involved and the need for very specialized software to carry them out. This paper presents a new gradient model which can and has been applied to large scale networks. Mathematically, the model is formulated as a convex minimization problem where, by following the direction of the steepest descent, it is ensured that the original O-D matrix is not changed more than necessary. The paper shows how this demand adjustment model can be implemented without the need to develop any new software, by using existing features of a standard transportation planning package (EMME/2). The model has been used successfully in urban and national scale projects in Switzerland, Sweden and Finland, using networks with up to 522 traffic zones and 12,460 links, results of which are given.


Real-time Assessment and Use of Arterial Street Capacity for Freeway Diversion Routing

Real-time Assessment and Use of Arterial Street Capacity for Freeway Diversion Routing

Author:

Publisher:

Published: 1996

Total Pages: 108

ISBN-13:

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This report summarizes the methodology developed for the evaluation of excess capacity available on arterial streets and frontage roads for use during diversion of freeway traffic to alleviate recurring and non-recurring congestion. An evaluation of the IH-10/Fredericksburg Road corridor in San Antonio was performed to determine the excess capacity available for diverted traffic during the peak and off-peak periods. A simulation study was also performed to investigate the amount of diversion and its benefits to the corridor during the recurring P.M. peak hour congestion in the IH-10/Fredericksburg corridor in San Antonio. An investigation of guidelines for the use of Changeable Message Signs on arterials and past experience with their use was also performed in this study.


Advances in Natural Computation

Advances in Natural Computation

Author: Licheng Jiao

Publisher: Springer

Published: 2006-09-28

Total Pages: 1037

ISBN-13: 354045909X

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This is volume II of the proceedings of the Second International Conference on Natural Computation, ICNC 2006. After a demanding review process 168 carefully revised full papers and 86 revised short papers were selected from 1915 submissions for presentation in two volumes. The 124 papers in the second volume are organized in topical sections on additional topics in natural computation, natural computation techniques applications, hardware, and cross-disciplinary topics.


Traffic Simulation and Data

Traffic Simulation and Data

Author: Winnie Daamen

Publisher: CRC Press

Published: 2014-09-17

Total Pages: 261

ISBN-13: 1482228718

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A single source of information for researchers and professionals, Traffic Simulation and Data: Validation Methods and Applications offers a complete overview of traffic data collection, state estimation, calibration and validation for traffic modelling and simulation. It derives from the Multitude Project-a European Cost Action project that incorpo