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Author: Gabriel Godin Publisher: ISBN: Category : Ocean waves Languages : en Pages : 32
Book Description
I review the present procedures used to calculate the spectra of wave data. I suggest a coarser rate of sampling of the data, the use of interpolation to search for the frequency of the maximum power and the calculation of smoother spectra over broader bandwidths, and recommend the use of the method of maximum entropy because it does these tasks effectively.
Author: Gabriel Godin Publisher: ISBN: Category : Ocean waves Languages : en Pages : 32
Book Description
I review the present procedures used to calculate the spectra of wave data. I suggest a coarser rate of sampling of the data, the use of interpolation to search for the frequency of the maximum power and the calculation of smoother spectra over broader bandwidths, and recommend the use of the method of maximum entropy because it does these tasks effectively.
Author: Gabriel Godin Publisher: ISBN: Category : Ocean waves Languages : en Pages : 32
Book Description
I review the present procedures used to calculate the spectra of wave data. I suggest a coarser rate of sampling of the data, the use of interpolation to search for the frequency of the maximum power and the calculation of smoother spectra over broader bandwidths, and recommend the use of the method of maximum entropy because it does these tasks effectively.
Author: Grant Hearn Publisher: Butterworth-Heinemann ISBN: 0080541550 Category : Technology & Engineering Languages : en Pages : 321
Book Description
This text provides a thorough explanation of the underlying principles of spectral analysis and the full range of estimation techniques used in engineering. The applications of these techniques are demonstrated in numerous case studies, illustrating the approach required and the compromises to be made when solving real engineering problems. The principles outlined in these case studies are applicable over the full range of engineering disciplines and all the reader requires is an understanding of elementary calculus and basic statistics. The realistic approach and comprehensive nature of this text will provide undergraduate engineers and physicists of all disciplines with an invaluable introduction to the subject and the detailed case studies will interest the experienced professional. No more than a knowledge of elementary calculus, and basic statistics and probability is needed Accessible to undergraduates at any stage of their courses Easy and clear to follow
Author: Li-hwa Lin Publisher: ISBN: Category : Ocean waves Languages : en Pages : 408
Book Description
Directional wave spectra have been estimated in this study based upon simultaneous subsurface measurements of current and pressure. Two previously developed methods, the stochastic and deterministic approaches, have been reviewed and restudied. It is demonstrated by means of the Correlation Theorem that the stochastic and deterministic approaches are, under certain conditions, identical. In order to improve directional spectrum results obtained from the combined stochastic/deterministic approach, a new method, the geometric approach, has been developed as part of this research effort. The geometric approach matches Fourier transformed wave properties to frequency dependent wavelet pairs in each frequency interval. The amplitude, direction and phase of each wavelet are uniquely specified by equating kinematic and dynamic properties for each frequency component. Wavelets evaluated in each frequency interval do not have an artificially imposed phase constraint in the geometric approach as they have in the stochastic/deterministic approach, providing a more realistic model to represent the directional properties of ocean random waves. This study shows that the geometric approach provides more reliable predictions of the water surface one-dimensional spectra as well as directional spectra. Finally, some semi-empirical equations are proposed and combined to represent the directional spectrum model. A least square error minimization analysis is used to quantify empirical equation parameters. The resulting directional spectra obtained from alternative methods are compared based on either real ocean data or computer simulated data.
Author: Gerd Masselink Publisher: Routledge ISBN: 1134672918 Category : Nature Languages : en Pages : 513
Book Description
The world's coastlines represent a myriad of dynamic and constantly changing environments. Heavily settled and intensely used areas, they are of enormous importance to humans and understanding how they are shaped and change is crucial to our future. Introduction to Coastal Processes and Geomorphologybegins by discussing coastal systems and shows how these systems link to the processes examined in detail throughout the book. These include the morphodynamic paradigm, tides, waves and sediment transport. Later chapters explore fluvial deltas, estuaries, beaches and barriers, coastal sand dunes and geologically-influenced coasts such as cliffs, coral reefs and atolls. A new chapter addresses the forward-facing aspect of coastal morphodynamics, including the ways in which coasts respond to rapid climate changes such as present day global warming. Also new to this second edition is a chapter on future coasts which considers the wider effects of coastal change on other important aspects of coastal systems, including ecology, management, socio-cultural activities, built and natural heritage, and archaeology. Case studies using examples from around the world illustrate theory in practice and bring the subject to life. Each chapter starts by outlining the 'aims' and questions at the end allow you to track your progress. This book is accompanied by additional resources online at www.hodderplus.com/geography including: Answers to the questions available to download as MP3 files Expanded case studies with colour photos, links to relevant websites and a map link to pinpoint the case study location Interactive multiple choice questions and worked examples The ebook edition is in VitalBookTM Bookshelf - an ebook reader which allows you to: download the ebook to your computer or access it anywhere with an internet browser search the full text of all of the ebooks that you hold on your bookshelf for instant access to the information you need make and share notes and highlights on your ebooks copy and print text and figures customize your view by changing font size and layout.
Author: Richard E. Thomson Publisher: Elsevier ISBN: 0080477003 Category : Science Languages : en Pages : 654
Book Description
Data Analysis Methods in Physical Oceanography is a practical referenceguide to established and modern data analysis techniques in earth and oceansciences. This second and revised edition is even more comprehensive with numerous updates, and an additional appendix on 'Convolution and Fourier transforms'. Intended for both students and established scientists, the fivemajor chapters of the book cover data acquisition and recording, dataprocessing and presentation, statistical methods and error handling,analysis of spatial data fields, and time series analysis methods. Chapter 5on time series analysis is a book in itself, spanning a wide diversity oftopics from stochastic processes and stationarity, coherence functions,Fourier analysis, tidal harmonic analysis, spectral and cross-spectralanalysis, wavelet and other related methods for processing nonstationarydata series, digital filters, and fractals. The seven appendices includeunit conversions, approximation methods and nondimensional numbers used ingeophysical fluid dynamics, presentations on convolution, statisticalterminology, and distribution functions, and a number of importantstatistical tables. Twenty pages are devoted to references. Featuring:• An in-depth presentation of modern techniques for the analysis of temporal and spatial data sets collected in oceanography, geophysics, and other disciplines in earth and ocean sciences.• A detailed overview of oceanographic instrumentation and sensors - old and new - used to collect oceanographic data.• 7 appendices especially applicable to earth and ocean sciences ranging from conversion of units, through statistical tables, to terminology and non-dimensional parameters. In praise of the first edition: "(...)This is a very practical guide to the various statistical analysis methods used for obtaining information from geophysical data, with particular reference to oceanography(...)The book provides both a text for advanced students of the geophysical sciences and a useful reference volume for researchers." Aslib Book Guide Vol 63, No. 9, 1998 "(...)This is an excellent book that I recommend highly and will definitely use for my own research and teaching." EOS Transactions, D.A. Jay, 1999 "(...)In summary, this book is the most comprehensive and practical source of information on data analysis methods available to the physical oceanographer. The reader gets the benefit of extremely broad coverage and an excellent set of examples drawn from geographical observations." Oceanography, Vol. 12, No. 3, A. Plueddemann, 1999 "(...)Data Analysis Methods in Physical Oceanography is highly recommended for a wide range of readers, from the relative novice to the experienced researcher. It would be appropriate for academic and special libraries." E-Streams, Vol. 2, No. 8, P. Mofjelf, August 1999
Author: Paolo Boccotti Publisher: Elsevier ISBN: 0080543723 Category : Technology & Engineering Languages : en Pages : 521
Book Description
In a unitary way, this monograph deals with a wide range of subjects related to the mechanics of sea waves. The book highlights recent theoretical results on the dynamics of random wind-generated waves, on long-term wave statistics, and on beach planform evolution. A fresh approach is given to more traditional concepts. For example, new evidence from a recent series of small-scale field experiments is used to introduce some crucial topics like wave forces. Also, the book gives some worked examples for the design of offshore or coastal structures. An exciting subject dealt with in the book is the quasi-deterministic mechanics of three-dimensional wave groups in sea storms, and the loads exerted by these wave groups on offshore structures. The text is intended for researchers and graduate students in ocean engineering, but may also be understood by undergraduates. The more complex concepts are explained with examples or more extensive case studies.
Author: Gabriel Godin
Author: Gabriel Godin
Author: Gabriel Godin
Author: Grant Hearn
Author: Li-hwa Lin
Author: United States. Ship Structure Committee
Author: Gerd Masselink
Author: B.M. Båth
Author: Richard E. Thomson
Author: Bernard Le Méhauté
Author: Paolo Boccotti