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Author: Changfan Zhang Publisher: OAE Publishing Inc. ISBN: Category : Computers Languages : en Pages : 19
Book Description
As a key component of the heavy-haul railway system, the rail is prone to damages caused by harsh operating conditions. To secure a safe operation, it is of great essence to detect the damage status of the rail. However, current damage detection methods are mainly manual, so problems such as strong subjectivity, lag in providing results, and difficulty in quantifying the degree of damage are easily generated. Therefore, a new prediction method based on the improved pelican algorithm and channel attention mechanism is proposed to evaluate the stripping of heavy-haul railway rails. By processing the rail vibration acceleration, it predicts the stripping damage degree. Specifically, a comprehensive health index measuring the degree of rail stripping is first established by principal component analysis and correlation analysis to avoid the one-sidedness of a single evaluation index. Then, the convolutional bidirectional gated recursive network is trained and generalized, and the pelican algorithm, improved by multiple hybrid strategies, is used to optimize the hyperparameters in the network so as to find the optimal solution by constantly adjusting the search strategy. The squeeze-excitation channel attention module is then incorporated to re-calibrate the weights of valid features and to improve the accuracy of the model. Finally, the proposed method is tested on a specific rail stripping dataset and a public dataset of PHM2012 bearings, and the generalization and effectiveness performance of the proposed method is proved.
Author: Changfan Zhang Publisher: OAE Publishing Inc. ISBN: Category : Computers Languages : en Pages : 19
Book Description
As a key component of the heavy-haul railway system, the rail is prone to damages caused by harsh operating conditions. To secure a safe operation, it is of great essence to detect the damage status of the rail. However, current damage detection methods are mainly manual, so problems such as strong subjectivity, lag in providing results, and difficulty in quantifying the degree of damage are easily generated. Therefore, a new prediction method based on the improved pelican algorithm and channel attention mechanism is proposed to evaluate the stripping of heavy-haul railway rails. By processing the rail vibration acceleration, it predicts the stripping damage degree. Specifically, a comprehensive health index measuring the degree of rail stripping is first established by principal component analysis and correlation analysis to avoid the one-sidedness of a single evaluation index. Then, the convolutional bidirectional gated recursive network is trained and generalized, and the pelican algorithm, improved by multiple hybrid strategies, is used to optimize the hyperparameters in the network so as to find the optimal solution by constantly adjusting the search strategy. The squeeze-excitation channel attention module is then incorporated to re-calibrate the weights of valid features and to improve the accuracy of the model. Finally, the proposed method is tested on a specific rail stripping dataset and a public dataset of PHM2012 bearings, and the generalization and effectiveness performance of the proposed method is proved.
Author: Daniel R. Thevenot Publisher: IWA Publishing ISBN: 1843391600 Category : Science Languages : en Pages : 313
Book Description
The European DayWater project has developed a prototype of an Adaptive Decision Support System (ADSS) related to urban stormwater pollution source control. The DayWater ADSS greatly facilitates decision-making for stormwater source control, which is currently impeded by the large number of stakeholders involved and by the necessary multidisciplinary knowledge. This book presents the results of this project, providing new insights into both technical and management issues. The main objectives of its technical chapters are pollution source control modelling, risk and impact assessment, and evaluation and comparison of best management practices. It also covers management aspects, such as the analysis of the decision-making processes in stormwater source control, at a European scale, and stormwater management strategies in general. The combination of scientific-technical and socio-managerial knowledge, with the strong cooperation of numerous end-users, reflects the innovative character of this book which includes actual applications of the ADSS prototype in significant case studies. DayWater: an Adaptive Decision Support System for Urban Stormwater Management contains 26 chapters collectively prepared by DayWater scientific partners and end-users associated with this European Research and Development project. It includes: A general presentation of the DayWater Adaptive Decision Support System (ADSS) structure and operation modes A detailed description of the major components of this ADSS prototype The assessment of its components in significant case studies in France, Germany and Sweden The proceedings of the International Conference on Decision Support Systems for Integrated Urban Water Management, held in Paris on 3-4 November 2005. The book presents the ADSS prototype including a combination of freely accessible on-line databases, guidance documents, “road maps” and modelling or multi-criteria analysis tools. As demonstrated in several significant case studies the challenge for stormwater managers is to make the benefits of urban stormwater management visible to society, resulting in active co-operation of a diversity of stakeholders. Only then, will sustainable management succeed. DayWater: an Adaptive Decision Support System for Urban Stormwater Management advances this cause of sustainable urban management through Urban stormwater management, and makes achievable (by means of risk and vulnerability tools which are included) the goal of integrated urban water management (IUWM).
Author: David Omand Publisher: Penguin UK ISBN: 0241385202 Category : Political Science Languages : en Pages : 207
Book Description
From the former director of GCHQ, learn the methodology used by British intelligence agencies to reach judgements, establish the right level of confidence and act decisively. Full of revealing examples from a storied career, including key briefings with Prime Ministers and strategies used in conflicts from the Cold War to the present, in How Spies Think Professor Sir David Omand arms us with the tools to sort fact from fiction. And shows us how to use real intelligence every day. ***** 'One of the best books ever written about intelligence analysis and its long-term lessons' Christopher Andrew, The Defence of the Realm: The Authorized History of MI5 'An invaluable guide to avoiding self-deception and fake news' Melanie Phillips, The Times WINNER OF THE NEAVE BOOK PRIZE 2022 LONGLISTED FOR THE ORWELL PRIZE FOR POLITICAL WRITING 2021
Author: William Davies Publisher: MIT Press ISBN: 1906897689 Category : Political Science Languages : en Pages : 402
Book Description
An innovative new anthology exploring how science fiction can motivate new approaches to economics. From the libertarian economics of Ayn Rand to Aldous Huxley's consumerist dystopias, economics and science fiction have often orbited each other. In Economic Science Fictions, editor William Davies has deliberately merged the two worlds, asking how we might harness the power of the utopian imagination to revitalize economic thinking. Rooted in the sense that our current economic reality is no longer credible or viable, this collection treats our economy as a series of fictions and science fiction as a means of anticipating different economic futures. It asks how science fiction can motivate new approaches to economics and provides surprising new syntheses, merging social science with fiction, design with politics, scholarship with experimental forms. With an opening chapter from Ha-Joon Chang as well as theory, short stories, and reflections on design, this book from Goldsmiths Press challenges and changes the notion that economics and science fiction are worlds apart. The result is a wealth of fresh and unusual perspectives for anyone who believes the economy is too important to be left solely to economists. Contributors AUDINT, Khairani Barokka, Carina Brand, Ha-Joon Chang, Miriam Cherry, William Davies, Mark Fisher, Dan Gavshon-Brady and James Pockson, Owen Hatherley, Laura Horn, Tim Jackson, Mark Johnson, Bastien Kerspern, Nora O Murchú, Tobias Revell et al., Judy Thorne, Sherryl Vint, Joseph Walton, Brian Willems
Author: Kathleen A. Galvin Publisher: Springer Science & Business Media ISBN: 1402049064 Category : Science Languages : en Pages : 422
Book Description
With detailed data from nine sites around the world, the authors examine how the so-called ‘fragmentation’ of these fragile landscapes occurs and the consequences of this break-up for ecosystems and the people who depend on them. ‘Rangelands’ make up a quarter of the world’s landscape, and here, the case is developed that while fragmentation arises from different natural, social and economic conditions worldwide, it creates similar outcomes for human and natural systems.
Author: Tom Verebes Publisher: Routledge ISBN: 1135055149 Category : Architecture Languages : en Pages : 312
Book Description
Computational design has become widely accepted into mainstream architecture, but this is the first book to advocate applying it to create adaptable masterplans for rapid urban growth, urban heterogeneity, through computational urbanism. Practitioners and researchers here discuss ideas from the fields of architecture, urbanism, the natural sciences, computer science, economics, and mathematics to find solutions for managing urban change in Asia and developing countries throughout the world. Divided into four parts (historical and theoretical background, our current situation, methodologies, and prototypical practices), the book includes a series of essays, interviews, built case studies, and original research to accompany chapters written by editor Tom Verebes to give you the most comprehensive overview of this approach. Essays by Marina Lathouri, Jorge Fiori, Jonathan Solomon, Patrik Schumacher, Peter Trummer, and David Jason Gerber. Interviews with Dana Cuff, Xu Wei Guo, Matthew Prior, Tom Barker, Su Yunsheng, and Brett Steele. Built case studies by Zaha Hadid Architects, James Corner Field Operations, XWG Studio, MAD, OCEAN Consultancy Network, Plasma Studio, Groundlab, Peter Trummer, Serie Architects, dotA, and Rocker-Lange Architects.
Author: Almo Farina Publisher: Springer Science & Business Media ISBN: 9400773749 Category : Science Languages : en Pages : 315
Book Description
Soundscape Ecology represents a new branch of ecology and it is the result of the integration of different disciplines like Landscape ecology, Bioacoustics, Acoustic ecology, Biosemiotics, etc. The soundscape that is the object of this discipline, is defined as the acoustic context resulting from natural and human originated sounds and it is considered a relevant environmental proxy for animal and human life. With Soundscape Ecology Almo Farina means to offer a new cultural tool to investigate a partially explored component of the environmental complexity. For this he intends to set the principles of this new discipline, to delineate the epistemic domain in which to develop new ideas and theories and to describe the necessary integration with all the other ecological/environmental disciplines. The book is organized in ten chapters. The first two chapters delineate principles and theory of soundscape ecology. Chapters three and four describe the bioacoustic and communication theories. Chapter five is devoted to the human dimension of soundscape. Chapters six to eight regard the major sonic patterns like noise, choruses and vibrations. Chapter nine is devoted to the methods in soundscape ecology and finally chapter ten describes the application of the soundscape analysis.
Author: Christopher Tilley Publisher: UCL Press ISBN: 1787355608 Category : Architecture Languages : en Pages : 458
Book Description
London’s Urban Landscape is the first major study of a global city to adopt a materialist perspective and stress the significance of place and the built environment to the urban landscape. Edited by Christopher Tilley, the volume is inspired by phenomenological thinking and presents fine-grained ethnographies of the practices of everyday life in London. In doing so, it charts a unique perspective on the city that integrates ethnographies of daily life with an analysis of material culture. The first part of the volume considers the residential sphere of urban life, discussing in detailed case studies ordinary residential streets, housing estates, suburbia and London’s mobile ‘linear village’ of houseboats. The second part analyses the public sphere, including ethnographies of markets, a park, the social rhythms of a taxi rank, and graffiti and street art. London’s Urban Landscape returns us to the everyday lives of people and the manner in which they understand their lives. The deeply sensuous character of the embodied experience of the city is invoked in the thick descriptions of entangled relationships between people and places, and the paths of movement between them. What stories do door bells and house facades tell us about contemporary life in a Victorian terrace? How do antiques acquire value and significance in a market? How does living in a concrete megastructure relate to the lives of the people who dwell there? These and a host of other questions are addressed in this fascinating book that will appeal widely to all readers interested in London or contemporary urban life.
Author: Changfan Zhang
Author: Changfan Zhang
Author: Daniel R. Thevenot
Author: David Omand
Author: United States. Defense Logistics Agency
Author: Ivan A. Cooper
Author: William Davies
Author: Kathleen A. Galvin
Author: Tom Verebes
Author: Almo Farina
Author: Christopher Tilley