Author: Monica BillioPublisher:
ISBN:
Category :
Languages : fr
Pages : 0
Book Description
Méthodes fondées sur des simulations pour l'inférence dans les modèles espace-état non linéaires
Author: Monica BillioContribution à la détermination de méthodes d'estimation et d'identification des systèmes non linéaires
Author: Jean-Paul BriennePublisher:
ISBN:
Category :
Languages : fr
Pages : 236
Book Description
Le travail présenté traite des problèmes de la modélisation et de l'identification des systèmes non linéaires. En faisant référence à un processus (système entraîné par un moteur pas à pas), nous avons élaboré, en s'appuyant sur les équations décrivant son fonctionnement, une représentation dans l'espace d'état permettant de définir ses grandeurs d'entrées, de sorties ainsi que de son état. Cette description nous conduisant à un modèle fortement non linéaire, nous déterminons, à partir d'hypothèses simplificatrices faites sur les non linéarités du système, un modèle linéarise. En s'appuyant sur cette nouvelle représentation, nous avons élaboré des méthodes d'identification, basées sur la réponse du processus pour une consigne d'entrée donnée. Elles consistent, à partir d'informations reçues sur le système, à choisir des points particuliers dont les caractéristiques conduisent de façon rapide et précise à la connaissance des paramètres du modèle linéarisé. Les algorithmes d'identification étant très sensibles aux bruits, nous déterminons une méthode de filtrage nécessaire à l'élimination de ces parasites après avoir présenté auparavant le dispositif nécessaire à l'obtention et à la mémorisation des informations recueillies sur le processus. Ensuite, nous sélectionnons, en fonction du filtre choisi, l'algorithme d'identification le mieux adapté à la détermination des paramètres du modèle décrivant l'actionneur.
Practical Time Series Analysis
Author: Aileen NielsenPublisher: O'Reilly Media
ISBN: 1492041629
Category : Computers
Languages : en
Pages : 500
Book Description
Time series data analysis is increasingly important due to the massive production of such data through the internet of things, the digitalization of healthcare, and the rise of smart cities. As continuous monitoring and data collection become more common, the need for competent time series analysis with both statistical and machine learning techniques will increase. Covering innovations in time series data analysis and use cases from the real world, this practical guide will help you solve the most common data engineering and analysis challengesin time series, using both traditional statistical and modern machine learning techniques. Author Aileen Nielsen offers an accessible, well-rounded introduction to time series in both R and Python that will have data scientists, software engineers, and researchers up and running quickly. You’ll get the guidance you need to confidently: Find and wrangle time series data Undertake exploratory time series data analysis Store temporal data Simulate time series data Generate and select features for a time series Measure error Forecast and classify time series with machine or deep learning Evaluate accuracy and performance
Theory of Reproducing Kernels and Applications
Author: Saburou SaitohPublisher: Springer
ISBN: 9789811005299
Category : Mathematics
Languages : en
Pages : 0
Book Description
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.
Statistical Inference for Ergodic Diffusion Processes
Author: Yury A. KutoyantsPublisher: Springer Science & Business Media
ISBN: 144713866X
Category : Mathematics
Languages : en
Pages : 493
Book Description
The first book in inference for stochastic processes from a statistical, rather than a probabilistic, perspective. It provides a systematic exposition of theoretical results from over ten years of mathematical literature and presents, for the first time in book form, many new techniques and approaches.
Semiparametric Theory and Missing Data
Author: Anastasios TsiatisPublisher: Springer Science & Business Media
ISBN: 0387373454
Category : Mathematics
Languages : en
Pages : 392
Book Description
This book summarizes current knowledge regarding the theory of estimation for semiparametric models with missing data, in an organized and comprehensive manner. It starts with the study of semiparametric methods when there are no missing data. The description of the theory of estimation for semiparametric models is both rigorous and intuitive, relying on geometric ideas to reinforce the intuition and understanding of the theory. These methods are then applied to problems with missing, censored, and coarsened data with the goal of deriving estimators that are as robust and efficient as possible.
Active Subspaces
Author: Paul G. ConstantinePublisher: SIAM
ISBN: 1611973864
Category : Computers
Languages : en
Pages : 105
Book Description
Scientists and engineers use computer simulations to study relationships between a model's input parameters and its outputs. However, thorough parameter studies are challenging, if not impossible, when the simulation is expensive and the model has several inputs. To enable studies in these instances, the engineer may attempt to reduce the dimension of the model's input parameter space. Active subspaces are an emerging set of dimension reduction tools that identify important directions in the parameter space. This book describes techniques for discovering a model's active subspace and proposes methods for exploiting the reduced dimension to enable otherwise infeasible parameter studies. Readers will find new ideas for dimension reduction, easy-to-implement algorithms, and several examples of active subspaces in action.
Four Decades of Scientific Explanation
Author: Wesley C. SalmonPublisher: University of Pittsburgh Press
ISBN: 0822959267
Category : Philosophy
Languages : en
Pages : 252
Book Description
As Aristotle stated, scientific explanation is based on deductive argument--yet, Wesley C. Salmon points out, not all deductive arguments are qualified explanations. The validity of the explanation must itself be examined. Four Decades of Scientific Explanation provides a comprehensive account of the developments in scientific explanation that transpired in the last four decades of the twentieth century. It continues to stand as the most comprehensive treatment of the writings on the subject during these years. Building on the historic 1948 essay by Carl G. Hempel and Paul Oppenheim, "Studies in the Logic of Explanation,” which introduced the deductive-nomological (D-N) model on which most work on scientific explanation was based for the following four decades, Salmon goes beyond this model's inherent basis of describing empirical knowledge to tells us “not only what, but also why.” Salmon examines the predominant models in chronological order and describes their development, refinement, and criticism or rejection. Four Decades of Scientific Explanation underscores the need for a consensus of approach and ongoing evaluations of methodology in scientific explanation, with the goal of providing a better understanding of natural phenomena.
Constructing a Sociology of Translation
Author: Michaela WolfPublisher: John Benjamins Publishing
ISBN: 9789027216823
Category : Language Arts & Disciplines
Languages : en
Pages : 246
Book Description
The view of translation as a socially regulated activity has opened up a broad field of research in the last few years. This volume deals with central questions of the new domain and aims to contribute to the conceptualisation of a general sociology of translation. Interdisciplinary in approach, it discusses the role of major representatives of sociology like Pierre Bourdieu, Bruno Latour, Bernard Lahire, Anthony Giddens or Niklas Luhmann in establishing a theoretical framework for a sociology of translation. Drawing on methodologies from sociology and integrating them into translation studies, the book questions some of the established categories in this discipline and calls for a redefinition of long-assumed principles. The contributions show the social involvement of translation in various fields and focus especially on the translator s position in an emerging sociology of translation, Bourdieu s influence in conceptualising this new sub-discipline, methodological questions and a sociologically oriented meta-discussion of translation studies.
Multispecies Approaches to Fisheries Management Advice
Author: M. C. MercerPublisher:
ISBN:
Category : Technology & Engineering
Languages : fr
Pages : 188
Book Description
This publication comprises the proceedings of an international workshop convened in St. John's, Nfld, Nov. 26-29, 1979. The purpose of the workshop was to discuss the results of recent multispecies research, its applications to management, and to consider future directions for research in this field. A total of 26 papers were presented, including a combination of experience papers, state-of-the-art review, and new scientific findings. Sequential sessions were held on fisheries systems research by the Department of Fisheries and Oceans, multispecies considerations in fisheries research and management advice in the ICES area, species interactions in the Northeast Pacific and Northwest Atlantic, fisheries interactions, and applications to fisheries management. The workshop concluded with a substantial discussion of implications of present knowledge for advice to fisheries managers and implications for research program planning. The Workshop Report comprises the Chairman's opening remarks, a report on main elements of discussion in the sessions, and a summarization of workshop conclusions.