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Download or read book W-SPSA written by Lu Lu (S.M.) and published by . This book was released on 2014 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The off-line calibration is a crucial step for the successful application of Dynamic Traffic Assignment (DTA) models in transportation planning and real time traffic management. While traditional approaches focus on the separate or sequential estimation of demand and supply in a DTA system, a recently proposed framework calibrates the demand and supply models simultaneously by formulating the off-line calibration as a constrained optimization problem. Simultaneous Perturbation Stochastic Approximation (SPSA) has been reported in the literature to be the most suitable solution algorithm for this problem due to its highly efficient gradient estimation approach. However, it turns out that the performance of SPSA in terms of convergence rate and long run accuracy can deteriorate significantly when the physical network size and the number of considered time intervals increase. To overcome this problem, this thesis proposes a new algorithm, called Weighted SPSA, or W-SPSA. W-SPSA improves SPSA's gradient estimation process by effectively reducing the noise generated by irrelevant measurements. Synthetic tests are performed to systematically compare the performance of SPSA and W-SPSA. W-SPSA shows scalability and robustness in the tests and outperforms SPSA under different problem scales and characteristics. The application of W-SPSA in real world large-scale DTA systems is demonstrated with a case study of the entire Singapore expressway network. Results show that WSPSA is a more suitable algorithm than SPSA for the off-line calibration of large-scale DTA models. The contributions of the thesis include: 1) identifying limitations of a state-of-the- art solution algorithm for the DTA off-line calibration problem, 2) presenting rigorous definitions of an enhanced algorithm and proposing approaches to estimate the required algorithm parameters, 3) systematically comparing the performance of the new algorithm against the state-of-the-art, 4) demonstrating the characteristics of the new algorithm through experiments, and 5) discussing the general steps and empirical technical considerations when tackling real world DTA off-line calibration problems.
Download or read book Rotifer Symposium IV written by L. May and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fourth international rotifer symposium was Wednesday afternoon a tour of Edinburgh, includ held in Edinburgh, Scotland, August 18 - 25, 1985, ing a visit to the Palace of Holyrood, was arranged. hosted by the Institute of Terrestrial Ecology. This This was followed by an evening banquet with meeting continued the tradition of holding rotifer traditional Scottish entertainment. On Thursday symposia at three-year intervals. The first an evening most participants attended a fireworks dis nouncement of the fourth meeting was circulated at play which was part of the Edinburgh Festival. Fi the end of 1983 to almost 300 people whose names nally, an excursion to Loch Lomond and the Tros appeared on the mailing list of the international sach hills was arranged for the Saturday after the newsletter, Rotifer News. In total, 68 people from meeting. 23 countries attended the meeting. It is interesting The organisers would like to thank Mr. C. J. to note that, of these 68 participants, 21 had at Place and colleagues at the Institute of Terrestrial tended the first meeting, held in Linz, Austria, Ecology for their invaluable help in organising the 1976, and 13 had attended all three previous meet meeting and preparing the symposium volume for ings. publication. We are also grateful for financial sup As in previous symposia, some research topics port from the Royal Society, the British Council were identified in advance of the meeting as being and British Petroleum (Scotland).
Download or read book Seismological Bulletin written by and published by . This book was released on with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Antarctic Seismological Bulletin by :
Download or read book Antarctic Seismological Bulletin written by and published by . This book was released on 1962 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Longman's Gazetteer of the World by : George Goudie Chisholm
Download or read book Longman's Gazetteer of the World written by George Goudie Chisholm and published by . This book was released on 1895 with total page 1816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ad $ Summary written by and published by . This book was released on 2003 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advertising expenditure data across ten media: consumer magazines, Sunday magazines, newspapers, outdoor, network television, spot television, syndicated television, cable television, network radio, and national spot radio. Lists brands alphabetically and shows total ten media expenditures, media used, parent company and PIB classification for each brand. Also included in this report are industry class totals and rankings of the top 100 companies of the ten media.
Book Synopsis Stochastic Recursive Algorithms for Optimization by : S. Bhatnagar
Download or read book Stochastic Recursive Algorithms for Optimization written by S. Bhatnagar and published by Springer. This book was released on 2012-08-11 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stochastic Recursive Algorithms for Optimization presents algorithms for constrained and unconstrained optimization and for reinforcement learning. Efficient perturbation approaches form a thread unifying all the algorithms considered. Simultaneous perturbation stochastic approximation and smooth fractional estimators for gradient- and Hessian-based methods are presented. These algorithms: • are easily implemented; • do not require an explicit system model; and • work with real or simulated data. Chapters on their application in service systems, vehicular traffic control and communications networks illustrate this point. The book is self-contained with necessary mathematical results placed in an appendix. The text provides easy-to-use, off-the-shelf algorithms that are given detailed mathematical treatment so the material presented will be of significant interest to practitioners, academic researchers and graduate students alike. The breadth of applications makes the book appropriate for reader from similarly diverse backgrounds: workers in relevant areas of computer science, control engineering, management science, applied mathematics, industrial engineering and operations research will find the content of value.
Book Synopsis The Oceanographical Magazine by : Japan. Kishōchō
Download or read book The Oceanographical Magazine written by Japan. Kishōchō and published by . This book was released on 1968 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Southern Economic Journal written by and published by . This book was released on 2008 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Experiment Station Series by :
Download or read book Engineering Experiment Station Series written by and published by . This book was released on 1923 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Host Bibliographic Record for Boundwith Item Barcode 30112113370347 and Others by :
Download or read book Host Bibliographic Record for Boundwith Item Barcode 30112113370347 and Others written by and published by . This book was released on 1922 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by and published by . This book was released on 1922 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Theory of Linear-sinoidal Oscillations by : Henry Godfrey Cordes
Download or read book The Theory of Linear-sinoidal Oscillations written by Henry Godfrey Cordes and published by . This book was released on 1920 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sewage Disposal for Suburban Homes and for Isolated Institutions by : William Franklin Allison
Download or read book Sewage Disposal for Suburban Homes and for Isolated Institutions written by William Franklin Allison and published by . This book was released on 1922 with total page 1180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of the Iron Ore Resources of the Northwest by : Arthur Homer Fischer
Download or read book An Investigation of the Iron Ore Resources of the Northwest written by Arthur Homer Fischer and published by . This book was released on 1917 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulletin by : Washington State University. Engineering Experiment Station
Download or read book Bulletin written by Washington State University. Engineering Experiment Station and published by . This book was released on 1922 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of Copyright Entries written by and published by . This book was released on 1925 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:
