Apprentissage artificiel appliqué à la prévision de trajectoire d'avion

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ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Apprentissage artificiel appliqué à la prévision de trajectoire d'avion by : Richard Alligier

Download or read book Apprentissage artificiel appliqué à la prévision de trajectoire d'avion written by Richard Alligier and published by . This book was released on 2014 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'organisme Eurocontrol prévoit une forte hausse du trafic aérien européen d'ici l'année 2035. Cette hausse de trafic justifie le développement de nouveaux concepts et outils pour pouvoir assurer les services dus aux usagers de l'espace aérien. La prévision de trajectoires d'avion est au coeur de ces évolutions. Parmi ces outils, les outils de détection et résolution de conflits utilisent les trajectoires prédites pour anticiper les pertes de séparation entre avions et proposer des solutions aux contrôleurs aériens. L'horizon de prédiction utilisé pour cette application est de l'ordre de dix à vingt minutes. Parmi les algorithmes réalisant une détection et résolution de conflits, certains sont mis en œuvre au sol, obligeant ainsi les prédictions à être calculées en n'utilisant que les informations disponibles dans les systèmes sols. Dans ces systèmes, la masse des avions ainsi que les profils de vitesse ou de poussée des moteurs ne sont pas connus. Ainsi, le calcul d'une trajectoire prédite avec un modèle physique se fait en utilisant des valeurs de référence pour les paramètres inconnus. Dans ce cadre, nous nous intéressons à la phase de montée pour laquelle ces paramètres influent grandement sur la trajectoire de l'avion. Ce travail s'appuie sur le modèle physique BADA développé et maintenu par Eurocontrol. Ce modèle physique modélise, entre autres, les performances des avions. Il fournit également des valeurs de référence pour les paramètres inconnus comme la masse de l'avion, son profil de vitesse en montée, ou la commande de poussée des moteurs. Ce modèle, largement utilisé dans le monde entier, est particulièrement imprécis pour la phase de montée, car les valeurs réelles de ces paramètres sont parfois très éloignées des valeurs de référence. Dans cette thèse, nous proposons soit d'estimer directement certains paramètres, comme la masse, à partir des points passés de la trajectoire, soit d'utiliser des méthodes d'apprentissage supervisé afin d'apprendre, à partir d'exemples, des modèles prédisant les valeurs des paramètres manquants (masse, loi de poussée, vitesses cibles). Ces différentes méthodes sont testées sur des données radar Mode-C et Mode-S sur plusieurs types d'avions. Les prédictions obtenues avec ces méthodes sont comparées à celles obtenues avec les paramètres de référence. Elles sont également comparées avec les prédictions obtenues par des méthodes de régression prédisant directement l'altitude de l'avion plutôt que les paramètres du modèle physique. Nos méthodes permettent de réduire, suivant le type de l'avion, de 50 % à 85 % par rapport à la méthode BADA de référence, la racine de l'erreur quadratique moyenne sur l'altitude prédite à un horizon de dix minutes.

Dynamique Non-linéaire Et Le Chaos

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Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Dynamique Non-linéaire Et Le Chaos by :

Download or read book Dynamique Non-linéaire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Flight Vehicle System Identification

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Publisher : AIAA (American Institute of Aeronautics & Astronautics)
ISBN 13 :
Total Pages : 568 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Flight Vehicle System Identification by : Ravindra V. Jategaonkar

Download or read book Flight Vehicle System Identification written by Ravindra V. Jategaonkar and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2006 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable volume offers a systematic approach to flight vehicle system identification and exhaustively covers the time domain methodology. It addresses in detail the theoretical and practical aspects of various parameter estimation methods, including those in the stochastic framework and focusing on nonlinear models, cost functions, optimization methods, and residual analysis. A pragmatic and balanced account of pros and cons in each case is provided. The book also presents data gathering and model validation, and covers both large-scale systems and high-fidelity modeling. Real world problems dealing with a variety of flight vehicle applications are addressed and solutions are provided. Examples encompass such problems as estimation of aerodynamics, stability, and control derivatives from flight data, flight path reconstruction, nonlinearities in control surface effectiveness, stall hysteresis, unstable aircraft, and other critical considerations.

Theory of Reproducing Kernels and Applications

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Publisher : Springer
ISBN 13 : 9789811005299
Total Pages : 0 pages
Book Rating : 4.0/5 (52 download)

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Book Synopsis Theory of Reproducing Kernels and Applications by : Saburou Saitoh

Download or read book Theory of Reproducing Kernels and Applications written by Saburou Saitoh and published by Springer. This book was released on 2016-10-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a large extension of the general theory of reproducing kernels published by N. Aronszajn in 1950, with many concrete applications.In Chapter 1, many concrete reproducing kernels are first introduced with detailed information. Chapter 2 presents a general and global theory of reproducing kernels with basic applications in a self-contained way. Many fundamental operations among reproducing kernel Hilbert spaces are dealt with. Chapter 2 is the heart of this book.Chapter 3 is devoted to the Tikhonov regularization using the theory of reproducing kernels with applications to numerical and practical solutions of bounded linear operator equations.In Chapter 4, the numerical real inversion formulas of the Laplace transform are presented by applying the Tikhonov regularization, where the reproducing kernels play a key role in the results.Chapter 5 deals with ordinary differential equations; Chapter 6 includes many concrete results for various fundamental partial differential equations. In Chapter 7, typical integral equations are presented with discretization methods. These chapters are applications of the general theories of Chapter 3 with the purpose of practical and numerical constructions of the solutions.In Chapter 8, hot topics on reproducing kernels are presented; namely, norm inequalities, convolution inequalities, inversion of an arbitrary matrix, representations of inverse mappings, identifications of nonlinear systems, sampling theory, statistical learning theory and membership problems. Relationships among eigen-functions, initial value problems for linear partial differential equations, and reproducing kernels are also presented. Further, new fundamental results on generalized reproducing kernels, generalized delta functions, generalized reproducing kernel Hilbert spaces, andas well, a general integral transform theory are introduced.In three Appendices, the deep theory of Akira Yamada discussing the equality problems in nonlinear norm inequalities, Yamada's unified and generalized inequalities for Opial's inequalities and the concrete and explicit integral representation of the implicit functions are presented.

Before We Visit the Goddess

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Publisher : Simon and Schuster
ISBN 13 : 1476792011
Total Pages : 240 pages
Book Rating : 4.4/5 (767 download)

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Book Synopsis Before We Visit the Goddess by : Chitra Banerjee Divakaruni

Download or read book Before We Visit the Goddess written by Chitra Banerjee Divakaruni and published by Simon and Schuster. This book was released on 2017-04-25 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A new novel from the author of Oleander Girl, a novel in stories, built around crucial moments in the lives of 3 generations of women in an Indian/Indian-American Family"--

Narratives of Fear and Safety

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Publisher :
ISBN 13 : 9789523590144
Total Pages : 544 pages
Book Rating : 4.5/5 (91 download)

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Book Synopsis Narratives of Fear and Safety by : Kaisa Kaukiainen

Download or read book Narratives of Fear and Safety written by Kaisa Kaukiainen and published by . This book was released on 2020 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The essays in this edited volume, written in English and French, tackle the intriguing problems of fear and safety by analysing their various meanings and manifestations in literature and other narrative media. The articles bring forth new, cross-cultural interpretations on fear and safety through examining what kinds of genre-specific means of world-making narratives use to express these two affectivities. The articles also show how important it is to study these themes in order to understand challenges in times of global threats, such as the climate crisis, and - to imagine a better future. The main themes of the book are approached from various theoretical perspectives as related to their literary and cultural representations. Recent trends in research, such as affect and risk theory, serve as the basis for the discussion. Many of the articles in the volume discuss apocalyptic and dystopian narratives that currently permeate the entire cultural landscape. Dystopian narratives do not only deal with future threats, such as totalitarianism, technocracy, or environmental disasters, but also suggest alternative ways of being and new hopes in the form of political resistance. The articles in the volume also draw from disciplines such as gender studies and trauma studies to examine the threats posed by collective fears and aggression on individuals' lives and propose ways of coping with fear. These themes are addressed also in articles analysing new adaptations of old myths that retell stories of the past.

Critical Discourse Studies in Context and Cognition

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Publisher : John Benjamins Publishing
ISBN 13 : 9027206341
Total Pages : 241 pages
Book Rating : 4.0/5 (272 download)

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Book Synopsis Critical Discourse Studies in Context and Cognition by : Christopher Hart

Download or read book Critical Discourse Studies in Context and Cognition written by Christopher Hart and published by John Benjamins Publishing. This book was released on 2011 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: Critical Discourse Studies (CDS) is an exciting research enterprise in which scholars are concerned with the discursive reproduction of power and inequality. However, researchers in CDS are increasingly recognising the need to investigate the cognitive dimensions of discourse and context if they want to fully account for any connection between language, legitimisation and social action. This book presents a collection of papers in CDS concerned with various ideological discourses. Analyses are firmly rooted in linguistics and cognition constitutes a major focus of attention. The chapters, which are written by prominent researchers in CDS, come from a broad range of theoretical perspectives spanning pragmatics, cognitive psychology and cognitive linguistics. The book is essential reading for anyone working at the cutting edge of CDS and especially for those wishing to explore the central place that cognition must surely hold in the relationship between discourse and society.

Social Media in Industrial China

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Publisher : UCL Press
ISBN 13 : 191063462X
Total Pages : 238 pages
Book Rating : 4.9/5 (16 download)

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Book Synopsis Social Media in Industrial China by : Xinyuan Wang

Download or read book Social Media in Industrial China written by Xinyuan Wang and published by UCL Press. This book was released on 2016-09-13 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Life outside the mobile phone is unbearable.’ Lily, 19, factory worker. Described as the biggest migration in human history, an estimated 250 million Chinese people have left their villages in recent decades to live and work in urban areas. Xinyuan Wang spent 15 months living among a community of these migrants in a small factory town in southeast China to track their use of social media. It was here she witnessed a second migration taking place: a movement from offline to online. As Wang argues, this is not simply a convenient analogy but represents the convergence of two phenomena as profound and consequential as each other, where the online world now provides a home for the migrant workers who feel otherwise ‘homeless’. Wang’s fascinating study explores the full range of preconceptions commonly held about Chinese people – their relationship with education, with family, with politics, with ‘home’ – and argues why, for this vast population, it is time to reassess what we think we know about contemporary China and the evolving role of social media.

The London Underground and the public-private partnership agreements

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Publisher : The Stationery Office
ISBN 13 : 9780215038319
Total Pages : 134 pages
Book Rating : 4.0/5 (383 download)

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Book Synopsis The London Underground and the public-private partnership agreements by : Great Britain: Parliament: House of Commons: Transport Committee

Download or read book The London Underground and the public-private partnership agreements written by Great Britain: Parliament: House of Commons: Transport Committee and published by The Stationery Office. This book was released on 2008-01-25 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report from the Transport Committee, examines London Underground and the Public-Private Partnership Agreements. The Government originally announced proposals for modernising the London Underground network system via Public-Private Partnership (PPP) agreements in 1998. Three contracts were drawn up with: (i) Tube Lines for the maintenance and renewal of the Jubilee, Piccadilly and Northern Lines; (ii) with Metronet Rail BVC for the maintenance and renewal of the Bakerloo, Central, Victoria & Waterloo & City Lines; (iii) with Metronet Rail SSL, responsible for the maintenance and renewal of the "sub-surface lines": the Circle, District, Hammersmith & City, Metropolitan & East London Lines. These PPP Agreements, 30 years in duration, were arrangements to maintain, renew and upgrade parts of London Underground by private sector infrastructure companies (Infracos), whilst London Underground is responsible for services to customers. The PPP Agreements also set out a performance-related incentive and penalty scheme to remunerate the Infracos for the improvements they make to the network. In May 2007, Metronet admitted an overspend of £1 billion and was refused access to loan facilities by the banks. It then made a reference to the PPP Arbiter, which in turn triggered an Extraordinary Review (which occurs when extra costs are incurred above the level allowed for the bid). Metronet put in a bid for £551m but the PPP Arbiter provisionally concluded that a sum of £121m was appropriate. Metronet subsequently went into administration on 18 July 2007. The report sets out a number of conclusions and recommendations, including: contracts that were supposed to deliver 35 station upgrades, in fact delivered only 14, 40% of the requirement; stations that were supposed to cost Metronet SSL £2m, cost £7.5m, with only 65% of schedule track renewal accomplished; the Committee criticises the consequences of the imposition of PPP on Transport for London, as a "lamentable state of affairs", with the future of most of London Underground's upgrade and maintenance work in doubt; the Committee states, that the Government should remember the failure of Metronet before it considers entering similar arrangements; that the Government should publish a candid analysis of the events preceding Metronet's collapse and its consequences; the Committee believe that the PPP model was flawed and probably inferior to traditional public-sector management; that the Government needs to prioritise transparency and clarity to taxpayers and ensure that any future contracts result in clear accountability.

Cooperative Control of Distributed Multi-Agent Systems

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Publisher : John Wiley & Sons
ISBN 13 : 9780470724194
Total Pages : 452 pages
Book Rating : 4.7/5 (241 download)

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Book Synopsis Cooperative Control of Distributed Multi-Agent Systems by : Jeff Shamma

Download or read book Cooperative Control of Distributed Multi-Agent Systems written by Jeff Shamma and published by John Wiley & Sons. This book was released on 2008-02-28 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paradigm of ‘multi-agent’ cooperative control is the challenge frontier for new control system application domains, and as a research area it has experienced a considerable increase in activity in recent years. This volume, the result of a UCLA collaborative project with Caltech, Cornell and MIT, presents cutting edge results in terms of the “dimensions” of cooperative control from leading researchers worldwide. This dimensional decomposition allows the reader to assess the multi-faceted landscape of cooperative control. Cooperative Control of Distributed Multi-Agent Systems is organized into four main themes, or dimensions, of cooperative control: distributed control and computation, adversarial interactions, uncertain evolution and complexity management. The military application of autonomous vehicles systems or multiple unmanned vehicles is primarily targeted; however much of the material is relevant to a broader range of multi-agent systems including cooperative robotics, distributed computing, sensor networks and data network congestion control. Cooperative Control of Distributed Multi-Agent Systems offers the reader an organized presentation of a variety of recent research advances, supporting software and experimental data on the resolution of the cooperative control problem. It will appeal to senior academics, researchers and graduate students as well as engineers working in the areas of cooperative systems, control and optimization.

Unpacking IKEA

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Publisher : Routledge
ISBN 13 : 1317642961
Total Pages : 182 pages
Book Rating : 4.3/5 (176 download)

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Book Synopsis Unpacking IKEA by : Pauline Garvey

Download or read book Unpacking IKEA written by Pauline Garvey and published by Routledge. This book was released on 2017-11-23 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents the first anthropological ethnography of Ikea consumption and goes to the heart of understanding the unique and at times frantic popularity of this one iconic transnational store. Based on a year of participant observation in Stockholm’s Kungens Kurva store – the largest in the world - this book places the retailer squarely within the realm of the home-building efforts of individuals in Stockholm and to a lesser degree in Dublin. Ikea, the world’s largest retailer and one of its most interesting, is the focus of intense popular fascination internationally, yet is rarely subject to in-depth anthropological inquiry. In Unpacking Ikea, Garvey explores why Ikea is never ‘just a store’ for its customers, and questions why it is described in terms of a cultural package, as everyday and classless. Using in-depth interviews with householders over several years, this ethnographic study follows the furniture from the Ikea store outwards to probe what people actually take home with them.

Lamia Joreige

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Publisher :
ISBN 13 : 9786148035029
Total Pages : 328 pages
Book Rating : 4.0/5 (35 download)

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Book Synopsis Lamia Joreige by : Patricia Falguières

Download or read book Lamia Joreige written by Patricia Falguières and published by . This book was released on 2018 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Sensors: Theory, Algorithms, and Applications

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Publisher : Springer Science & Business Media
ISBN 13 : 0387886192
Total Pages : 245 pages
Book Rating : 4.3/5 (878 download)

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Book Synopsis Sensors: Theory, Algorithms, and Applications by : Vladimir L. Boginski

Download or read book Sensors: Theory, Algorithms, and Applications written by Vladimir L. Boginski and published by Springer Science & Business Media. This book was released on 2011-11-24 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this book is to advance the current knowledge of sensor research particularly highlighting recent advances, current work, and future needs. The goal is to share current technologies and steer future efforts in directions that will benefit the majority of researchers and practitioners working in this broad field of study.

Social Media in an English Village

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Publisher : UCL Press
ISBN 13 : 1910634433
Total Pages : 222 pages
Book Rating : 4.9/5 (16 download)

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Book Synopsis Social Media in an English Village by : Daniel Miller

Download or read book Social Media in an English Village written by Daniel Miller and published by UCL Press. This book was released on 2016-02-29 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Daniel Miller spent 18 months undertaking an ethnographic study with the residents of an English village, tracking their use of the different social media platforms. Following his study, he argues that a focus on platforms such as Facebook, Twitter and Instagram does little to explain what we post on social media. Instead, the key to understanding how people in an English village use social media is to appreciate just how ‘English’ their usage has become. He introduces the ‘Goldilocks Strategy’: how villagers use social media to calibrate precise levels of interaction ensuring that each relationship is neither too cold nor too hot, but ‘just right’.

Ad Hominem Arguments

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Publisher : University of Alabama Press
ISBN 13 : 0817355618
Total Pages : 338 pages
Book Rating : 4.8/5 (173 download)

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Book Synopsis Ad Hominem Arguments by : Douglas Walton

Download or read book Ad Hominem Arguments written by Douglas Walton and published by University of Alabama Press. This book was released on 1998 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: A vital contribution to legal theory and media and civic discourse In the 1860s, northern newspapers attacked Abraham Lincoln's policies by attacking his character, using the terms "drunk," "baboon," "too slow," "foolish," and "dishonest." Steadily on the increase in political argumentation since then, the argumentum ad hominem, or personal attack argument, has now been carefully refined as an instrument of "oppo tactics" and "going negative" by the public relations experts who craft political campaigns at the national level. In this definitive treatment of one of the most important concepts in argumentation theory and informal logic, Douglas Walton presents a normative framework for identifying and evaluating ad hominem or personal attack arguments. Personal attack arguments have often proved to be so effective, in election campaigns, for example, that even while condemning them, politicians have not stopped using them. In the media, in the courtroom, and in everyday confrontation, ad hominem arguments are easy to put forward as accusations, are difficult to refute, and often have an extremely powerful effect on persuading an audience. Walton gives a clear method for analyzing and evaluating cases of ad hominem arguments found in everyday argumentation. His analysis classifies the ad hominem argument into five clearly defined subtypes—abusive (direct), circumstantial, bias, "poisoning the well," and tu quoque ("you're just as bad") arguments—and gives methods for evaluating each type. Each subtype is given a well-defined form as a recognizable type of argument. The numerous case studies show in concrete terms many practical aspects of how to use textual evidence to identify and analyze fallacies and to evaluate argumentation as fallacious or not in particular cases.

Second International Conference on Artificial Neural Networks, 18-20 November 1991

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Publisher :
ISBN 13 :
Total Pages : 404 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Second International Conference on Artificial Neural Networks, 18-20 November 1991 by :

Download or read book Second International Conference on Artificial Neural Networks, 18-20 November 1991 written by and published by . This book was released on 1991 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second International Conference on Artificial Neural Networks was held November 1991 in the UK. Among the topics: theory, implementations, images, engineering applications, dynamical systems, control and robotics, hybrids, speech and natural language, medical applications, character recognition. No index. Annotation copyrighted by Book News, Inc., Portland, OR.

Turbulent Mirror

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Publisher : HarperCollins Publishers
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.4/5 (91 download)

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Book Synopsis Turbulent Mirror by : John Briggs

Download or read book Turbulent Mirror written by John Briggs and published by HarperCollins Publishers. This book was released on 1989 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the many faces of chaos and reveals how its laws direct most of the familiar processes of everyday life.