krainaksiazek detection theory a rand study 20106878

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Application of wavelet analysis in damage detection and localization - 2619308088

20,00 zł

Application of wavelet analysis in damage detection and localization Politechnika Gdańska


In recent years, structural damage detection and health monitoring have been subjects of intensive investigation due to their practical importance. For important engineering structures the early detection of damage is essential since propagation of defects might lead to a catastrophic failure. A relatively recent area of research in damage identification is based on the wavelet analysis. This technique can be performed on mode shapes or static deflections of structure elements. An important feature of the wavelet transform is the ability to characterize the local irregularity introduced by damage into the displacement shape and to react to subtle changes of the structure response.  The aim of the research is to verify the applicability of the wavelet transform in damage localization in engineering structures.  The efficiency of the applied wavelets is verified by experimentally and analytically determined data. Beam, plate and shell structures are tested experimentally and compared with numerical solutions. The measurement of the beam displacements in a large number of spatially distributed points is obtained by the photogrammetric measurement technique, whereas the measurements of the beam, plate and shell mode shapes are obtained by the impulse dynamic testing.  The locations of defects indicated by a peak in the spatial variation of the transformed response are successfully determined. The application of artificial neural networks enables prediction of the crack locations even if the analyzed data are noisy and illegible.  The main advantage of the proposed damage detection technique is the effective identification of the defect position without knowledge of neither characteristics of structure nor its mathematical model. Spis treści: LIST OF SYMBOLS AND ABBREVIATIONS    1. INTRODUCTION   1.1. Damage detection in civil engineering structures  1.2. Wavelet transform application in damage detection  1.3. Aim and scope of study    2. WAVELET THEORY   2.1. Introduction to wavelet analysis  2.2. One-dimensional wavelet transform  2.2.1. Continuous wavelet transform Vanishing moments Detection of singularities  2.2.2. Discrete wavelet transform Orthogonal wavelet transform Biorthogonal wavelet transform  2.2.3. Examples of wavelets  2.3. Two-dimensional wavelet transform  2.3.1. Continuous wavelet transform  2.3.2. Discrete wavelet transform  2.3.2. l. Orthogonal wavelet transform Biorthogonal wavelet transform  2.3.3. Examples of wavelets  2.4. Summary    3. WAVELET ANALYSIS IN DAMAGE DETECTION   3.1. Input signals  3.1.1. Experimental procedure for deflection lines determination  3.1.2. Experimental procedure for mode shapes determination  3.2. Wavelet selection for damage detection  3.2.1. One-dimensional wavelets  3.2.2. Two-dimensional wavelets  3.3. Discrete and continuous wavelet transform in damage detection  3.3.1. One-dimensional wavelet transform  3.3.2. Two-dimensional wavelet transform  3.4. Boundary effects  3.4.1. One-dimensional wavelet transform  3.4.2. Two-dimensional wavelet transform  3.5. Summary and conclusions    4. DAMAGE DETECTION ON EXPERIMENTAL EXAMPLES   4.1. Beam - static deflection lines  4.1.1. Experimental investigations of beam deflection lines  4.1.2. Numerical simulations  4.1.3. Results of wavelet analysis  4.2. Beam - mode shapes  4.2.1. Experimental investigations of beam mode shapes  4.2.2. Numerical simulations  4.2.3. Results of wavelet analysis  4.3. Plate - mode shapes  4.3.1. Experimental investigations of plate mode shapes  4.3.2. Numerical simulations  4.3.3. Results of wavelet analysis  4.4. Cylindrical shell - mode shapes  4.4.1. Experimental investigations of cylindrical shell mode shapes  4.4.2. Numerical simulations  4.4.3. Results of wavelet analysis  4.5. Summary and conclusions    5. DAMAGE DETECTION SYSTEMS BASED ON NEURAL NETWORKS   5.1. Fundamentals  5.2. Damage assessment using neural networks  5.3. Backpropagation neural network  5.4. Neural network defect detection system  5.4.1. Architecture  5.4.2. Training  5.4.3. Results of testing on experimental beam deflection lines  5.4.4. Results of testing on experimental beam mode shapes  5.4.5. Results of testing on experimental plate mode shapes  5.4.6. Results of testing on experimental shell mode shapes  5.5. Summary and conclusions 6. FINAL REMARKS 6.1. General remarks 6.2. Original elements of the study ACKNOWLEDGEMENTS  REFERENCES SUMMARY IN ENGLISH SUMMARY IN POLISH


The modern modelling conceptions of business systems. Practice and theory - 2619309622

23,00 zł

The modern modelling conceptions of business systems. Practice and theory Politechnika Gdańska


This monograph is the next study of results of scientific research work The Production Systems Engineering Department of the Gdansk University of Technology. The monograph contains modern modeling concepts of business systems, examples of applications and directions of development. The research issue picked up here is up-to-date and important both to the theory and the practice. It includes the following topics: Evolution and transformation of business and manufacturing systems; Cyclical changes of the management paradigm ; Open systems in business applications; Integration of digital factory in the ERP system; Theory of industrial clusters; Word Class Manufacturing - integrated improvement program based on Six Sigma, Lean and TPM methodologies; Mean drift detection using statistical process control(case study); Quality improvement in health care services; Principles of TQM in tourist service


Gravity: Where Do We Stand? - 2854419586

444,10 zł

Gravity: Where Do We Stand? Springer, Berlin

Książki / Literatura obcojęzyczna

This book presents an overview of the current understanding of gravitation, with a focus on the current efforts to test its theory, especially general relativity. It shows how the quest for a deeper theory, which would possibly incorporate gravity in the quantum realm, is more than ever an open field.§§The majority of the contributions deals with the manifold facets of "experimental gravitation", but the book goes beyond this and covers a broad range of subjects from the foundations of gravitational theories to astrophysics and cosmology.§§The book is divided into three parts. The first part deals with foundations and Solar System tests. An introductory pedagogical chapter reviews first Newtonian gravitational theory, special relativity, the equivalence principle and the basics of general relativity. Then it focuses on approximation methods, mainly the post-Newtonian formalism and the relaxed Einstein equations, with a discussion on how they are used in treating experimental tests and in the problem of generation and detection of gravitational waves. Following this is a set of chapters describing the most recent experiments, techniques and observations on the testing of gravity theories in the laboratory, around the Earth and in the Solar System.§§The second part is dedicated to astrophysical topics deeply linked with the study of gravitation, namely binary pulsars and the perspective of direct detection of gravitational waves. These cases are paradigmatic in that the gravitational signals act at the same time as messengers helping us to understand the properties of important and wide classes of astrophysical objects.§§The third part explores the many open issues in current knowledge of gravitation machinery, especially related to astrophysical and cosmological problems and the way possible solutions to them impact the quest for a quantum theory of gravitation and unified theory. Included is a selection of the many possible paths, giving a hint to the subtleties one is called upon. Whenever possible, a close link to observational constraints and possible experimental tests is provided.§§In selecting the topics of the various contributions, particular care has been devoted to ensure their fit in a coherent representation of our understanding of gravitational phenomena. The book is aimed at graduate level students and will form a valuable reference for those working in the field.§§


Random Signals for Engineers Using MATLAB and Mathcad, w. CD-ROM - 2854579511

633,58 zł

Random Signals for Engineers Using MATLAB and Mathcad, w. CD-ROM Springer, Berlin

Książki / Literatura obcojęzyczna

This introduction to random variables and signals provides engineering students with the analytical and computational tools for processing random signals using linear systems. It presents the underlying theory as well as examples and applications using computational aids throughout, in particular, computer-based symbolic computation programs are used for performing the analytical manipulations and the numerical calculations. The accompanying CD-ROM provides MathcadTM and MatlabTM notebooks and sheets to develop processing methods. Intended for a one-semester course for advanced undergraduate or beginning graduate students, the book covers such topics as: set theory and probability; random variables, distributions, and processes; deterministic signals, spectral properties, and transformations; and filtering, and detection theory. The large number of worked examples together with the programming aids make the book eminently suited for self study as well as classroom use.


Wundt and the Philosophical Foundations of Psychology - 2854480034

479,55 zł

Wundt and the Philosophical Foundations of Psychology Springer, Berlin

Książki / Literatura obcojęzyczna

This book reassesses the seminal work of Wilhelm Wundt by§discussing the history and philosophy of psychology. It traces the pioneering§theorist's intellectual development and the evolution of psychology throughout§his career. The author draws on little-known sources to situate psychological§concepts in Wundt's philosophical thought and address common myths and§misconceptions relating to Wundt's ideas. The ideas presented in this book show§why Wundt's work remains relevant in this era of ongoing mind/brain debate and interest§continues in the links between psychology and philosophy.§§Featured topics include:§§Theoretical§and philosophical foundations of Wundt's early work in scientific§psychology.§Wundt's§conception of scientific philosophy in relation to his theory of§knowledge.§The§epistemological dimensions of Wundt's final project in scientific§psychology. §Wundt and the§Philosophical Foundations of Psychology is a valuable resource for researchers,§professors, and graduate students in cognitive and related psychology and§philosophy disciplines.§§-----§§"Saulo Araujo raises Wundt scholarship to a new level. This§book is the splendid result of intensive studies of the entire Wundt oeuvre."§§Horst Gundlach§Heidelberg, Germany§§"Saulo Araujo, in his study of Wundt's§philosophy and psychology, is as remarkable for the breadth and depth of his§scholarship as he is for the clarity of his writing."§§Rand B. Evans§Emeritus Professor of Psychology, East Carolina University§§"A milestone, this book serves to§establish an advanced level in Wundt studies. Araujo presents a reconstruction§of Wundt's epistemology and philosophy of psychology and corrects§misunderstandings in the reception of Wundt's essential thoughts."§§Jochen Fahrenberg§Emeritus Professor of Psychology, University of Freiburg, Germany§


New Trends in Nanotechnology and Fractional Calculus - 2212846389

565,60 zł

New Trends in Nanotechnology and Fractional Calculus Springer Verlag

Dla dzieci

In recent years fractional calculus has played an important role in various fields such as mechanics, electricity, chemistry, biology, economics, modeling, identification, control theory and signal processing. The scope of this book is to present the state of the art in the study of fractional systems and the application of fractional differentiation. Furthermore, the manufacture of nanowires is important for the design of nanosensors and the development of high-yield thin films is vital in procuring clean solar energy. This wide range of applications is of interest to engineers, physicists and mathematicians.Table of contentsPreface;New trends in nanotechnology: Novel Molecular Diodes Developed by Chemial Conjugation of Carbon Nanotubes with Peptide Nucleic Acid, by Krishna V. Singh, Miroslav Penchev, Xiaoye Jing, Alfredo A. Martinez-Morales, Cengiz S. Ozkan and Mihri Ozkan;Hybrid Single Walled Carbon Nanotube FETs for High Fidelity DNA Detection, by Xu Wang, Mihri Ozkan, Gurer Budak, Ziya B. Guvenc and Cengiz S. Ozkan;Towards integrated nanoelectronic and photonic devices, by Alexander Quandt, Maurizio Ferrari and Giancarlo C. Righini;New noninvasive methods for


Eye Tracking - 2826629019

508,41 zł

Eye Tracking Oxford University Press

Książki / Literatura obcojęzyczna

We make 3-5 eye movements per second, and these movements are crucial in helping us deal with the vast amounts of information we encounter in our everyday lives. In recent years, thanks to the development of eye tracking technology, there has been a growing interest in monitoring and measuring these movements, with a view to understanding how we attend to and process the visual information we encounter Eye tracking as a research tool is now more accessible than ever, and is growing in popularity amongst researchers from a whole host of different disciplines. Usability analysts, sports scientists, cognitive psychologists, reading researchers, psycholinguists, neurophysiologists, electrical engineers, and others, all have a vested interest in eye tracking for different reasons. The ability to record eye-movements has helped advance our science and led to technological innovations. However, the growth of eye tracking in recent years has also presented a variety of challenges - in particular the issue of how to design an eye-tracking experiment, and how to analyse the data. This book is a much needed comprehensive handbook of eye tracking methodology. It describes how to evaluate and acquire an eye-tracker, how to plan and design an eye tracking study, and how to record and analyse eye-movement data. Besides technical details and theory, the heart of this book revolves around practicality - how raw data samples are converted into fixations and saccades using event detection algorithms, how the different representations of eye movement data are calculated using AOIs, heat maps and scanpaths, and how all the measures of eye movements relate to these processes. Part I presents the technology and skills needed to perform high-quality research with eye-trackers. Part II covers the predominant methods applied to the data which eye-trackers record. These include the parsing of raw sample data into oculomotor events, and how to calculate other representations of eye movements such as heat maps and transition matrices. Part III gives a comprehensive outline of the measures which can be calculated using the events and representations described in Part II. This is a taxonomy of the measures available to eye-tracking researchers, sorted by type of movement of the eyes and type of analysis. For anyone in the sciences considering conducting research involving eye-tracking, this book will be an essential reference work.


Delamination in Wood, Wood Products and Wood-Based Composites - 2854236133

924,64 zł

Delamination in Wood, Wood Products and Wood-Based Composites Springer Netherlands

Książki / Literatura obcojęzyczna

In the last quarter century, delamination has come to mean more than just a failure in adhesion between layers of bonded composite plies that might affect their load-bearing capacity. Ever-increasing computer power has meant that we can now detect and analyze delamination between, for example, cell walls in solid wood. This fast-moving and critically important field of study is covered in a book that provides everyone from manufacturers to research scientists the state of the art in wood delamination studies.§Divided into three sections, the book first details the general aspects of the subject, from basic information including terminology, to the theoretical basis for the evaluation of delamination. A settled terminology in this subject area is a first key goal of the book, as the terms which describe delamination in wood and wood-based composites are numerous and often confusing. The second section examines different and highly specialized methods for delamination detection such as confocal laser scanning microscopy, light microscopy, scanning electron microscopy and ultrasonics. Ways in which NDE (non-destructive evaluation) can be employed to detect and locate defects are also covered. The book s final section focuses on the practical aspects of this defect in a wide range of wood products covering the spectrum from trees, logs, laminated panels and glued laminated timbers to parquet floors. Intended as a primary reference, this book covers everything from the microscopic, anatomical level of delamination within solid wood sections to an examination of the interface of wood and its surface coatings. It provides readers with the perspective of industry as well as laboratory and is thus a highly practical sourcebook for wood engineers working in manufacturing as well as a comprehensively referenced text for materials scientists wrestling with the theory underlying the subject.


Principles of Digital Communication - 2854276497

316,95 zł

Principles of Digital Communication Cambridge University Press

Książki / Literatura obcojęzyczna

The renowned communications theorist Robert Gallager brings his lucid writing style to the study of the fundamental system aspects of digital communication for a one-semester course for graduate students. With the clarity and insight that have characterized his teaching and earlier textbooks, he develops a simple framework and then combines this with careful proofs to help the reader understand modern systems and simplified models in an intuitive yet precise way. A strong narrative and links between theory and practice reinforce this concise, practical presentation. The book begins with data compression for arbitrary sources. Gallager then describes how to modulate the resulting binary data for transmission over wires, cables, optical fibers, and wireless channels. Analysis and intuitive interpretations are developed for channel noise models, followed by coverage of the principles of detection, coding, and decoding. The various concepts covered are brought together in a description of wireless communication, using CDMA as a case study.


Seismic Exploration of Hydrocarbons in Heterogeneous Reservo - 2854237735

519,46 zł

Seismic Exploration of Hydrocarbons in Heterogeneous Reservo ELSEVIER

Książki / Literatura obcojęzyczna

Seismic Exploration of Hydrocarbons in Heterogeneous Reservoirs: New Theories, Methods and Applications is based on the field research conducted over the past decade by an authoring team of five of the worldâ


Understanding and Influencing Public Support for Insurgency and Terrorism - 2854323788

135,06 zł

Understanding and Influencing Public Support for Insurgency and Terrorism Random House Children`s Books

Książki / Literatura obcojęzyczna

Building on earlier RAND research that reviewed and integrated social science relevant to understanding terrorism and counterterrorism, this volume focuses on public support for both insurgency and terrorism and incorporates insights stimulated by social movement theory. The authors examine four case studies: al-Qa'ida's transnational jihadist movement, the Taliban insurgency in Afghanistan, the Kurdistan Workers' Party (PKK) in Turkey, and the Maoist insurgency in Nepal. The authors first developed a model, based on previous work, identifying the factors that influence public support for insurgency and terrorism and how these factors relate to each other. They then drew on extensive primary - and secondary-source material from each of the four case studies to evaluate and refine the model. Comparing the four case studies, the authors discuss which factors were most salient across cases and how their importance varied in each case. Finally, they offer a model of "persuasive communications" that connects the study's research to issues of strategy and policy.


Nulling Interferometers for Space-Based High-Contrast Visible Imaging and Measurement of Exoplanetary Environments - 2847097462

605,38 zł

Nulling Interferometers for Space-Based High-Contrast Visible Imaging and Measurement of Exoplanetary Environments Springer, Berlin

Książki / Literatura obcojęzyczna

High-contrast astronomical imaging has progressed significantly in the past decade. Many of these techniques have been laboratory demonstrated to perform at contrast levels adequate for the detection of Solar System-like planets and dust around nearby stars. None of them, however, have been demonstrated in space. The state of the art in high-contrast imaging systems that have been built for space-based observation, the environment best suited for spectroscopic study of exo-Earths, is the nulling interferometer that was flown on the Planetary Imaging Concept Testbed Using a Rocket Experiment (PICTURE). The PICTURE nulling interferometer, built from multiple optical elements, relies on the incorporation of additional dispersive components in order to deliver the broadband performance preferred for faint object imaging. These elements add to the cost, complexity, and misalignment risk of the instrument. §The Monolithic Achromatic Nulling Interference Coronagraph (MANIC) Brian Hicks describe in this thesis the first optic of its kind. He has taken the multiple optical element concept described in earlier works from theory to a flyable monolithic optic. Brian has advanced the state of the art in nulling interferometers by improving optical stability and robustness. Following application of the fabrication method described in this work, the design of MANIC also allows for broader band performance at higher contrast than that achieved with the PICTURE nulling interferometer.


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