Kirjojen hintavertailu. Mukana 11 244 527 kirjaa ja 12 kauppaa.
Kirja.info

Kirjahaku

Etsi kirjoja tekijän nimen, kirjan nimen tai ISBN:n perusteella.

1000 tulosta hakusanalla A.R. Lodder

Nonstationarities in Hydrologic and Environmental Time Series

Nonstationarities in Hydrologic and Environmental Time Series

A.R. Rao; K.H. Hamed

Springer-Verlag New York Inc.
2003
sidottu
Conventionally, time series have been studied either in the time domain or the frequency domain. The representation of a signal in the time domain is localized in time, i.e . the value of the signal at each instant in time is well defined . However, the time representation of a signal is poorly localized in frequency , i.e. little information about the frequency content of the signal at a certain frequency can be known by looking at the signal in the time domain . On the other hand, the representation of a signal in the frequency domain is well localized in frequency, but is poorly localized in time, and as a consequence it is impossible to tell when certain events occurred in time. In studying stationary or conditionally stationary processes with mixed spectra , the separate use of time domain and frequency domain analyses is sufficient to reveal the structure of the process . Results discussed in the previous chapters suggest that the time series analyzed in this book are conditionally stationary processes with mixed spectra. Additionally, there is some indication of nonstationarity, especially in longer time series.
Vertaile hintoja
Hilbert-Huang Transform Analysis of Hydrological and Environmental Time Series

Hilbert-Huang Transform Analysis of Hydrological and Environmental Time Series

A.R. Rao; E.-C. Hsu

Springer-Verlag New York Inc.
2008
sidottu
To accommodate the inherent non-linearity and non-stationarity of many natural time series, empirical mode decomposition (EMD) and Hilbert-Huang transform (HHT) provide an adaptive and efficient method. The HHT is based on the local characteristic time scale of the data. The HHT method provides not only a precise definition in time-frequency representation than the other conventional signal processing methods, but also more physically meaningful interpretation of the underlying dynamic processes. The EMD also works as a filter to extract the variability of signals with different scales and is applicable to non-linear and n- stationary processes. This promising algorithm has been applied in many fields since it was developed, but it has not been applied to hydrological and climatic time series. The discussion in this book starts with several simulated data sets in order to investigate the capability of this method and to compare it to other conventional frequency-domain analysis methods that assume stationarity. Rainfall, streamflow, temperature, wind speed time series and lake temperature data are investigated in this study. The aim of the work is to investigate periodicity, long term oscillations and trends embedded in these data by using HHT. The analysis is performed in both the time and frequency domains. The results from HHT are compared to those from the multi-taper method (MTM) which is based on Fourier Transform of the data.
Vertaile hintoja
Regionalization of Watersheds

Regionalization of Watersheds

A.R. Rao; V. V. Srinivas

Springer-Verlag New York Inc.
2008
sidottu
Design of water control structures, reservoir management, economic evaluation of flood protection projects, land use planning and management, flood insurance assessment, and other projects rely on knowledge of magnitude and frequency of floods. Often, estimation of floods is not easy because of lack of flood records at the target sites. Regional flood frequency analysis (RFFA) alleviates this problem by utilizing flood records pooled from other watersheds, which are similar to the watershed of the target site in flood characteristics. Clustering techniques are used to identify group(s) of watersheds which have similar flood characteristics. This book is a comprehensive reference on how to use these techniques for RFFA and is the first of its kind. It provides a detailed account of several recently developed clustering techniques, including those based on fuzzy set theory and artificial neural networks. It also documents research findings on application of clustering techniques to RFFA that remain scattered in various hydrology and water resources journals. The optimal number of groups defined in an area is based on cluster validation measures and L-moment based homogeneity tests. These form the bases to check the regions for homogeneity. The subjectivity involved and the effort needed to identify homogeneous groups of watersheds with conventional approaches are greatly reduced by using efficient clustering techniques discussed in this book. Furthermore, better flood estimates with smaller confidence intervals are obtained by analysis of data from homogeneous watersheds. Consequently, the problem of over- or under-designing by using these flood estimates is reduced. This leads to optimal economic design of structures. The advantages of better regionalization of watersheds and their utility are entering into hydrologic practice. Audience:This book will be of interest to researchers in stochastic hydrology, practitioners in hydrology and graduate students.
Vertaile hintoja
Rediscovering Sustainability

Rediscovering Sustainability

A.R.G. Heesterman

Ashgate Publishing Limited
2013
sidottu
Drawing on historical and current data, this thought-provoking book summarises the pathways to the present predicament and maps out strategies to develop financial and economic systems for a sustainable world. The content is arranged in three parts addressing 'Stylised Market Equilibrium', 'The Real Market Economy', and 'Present Affluence Versus the Future'. In Rediscovering Sustainability the authors help bridge the gap in understanding between scientists and the green movement on the one side and many economists on the other. Greens worry about catastrophic climate change and anthropocene mass extinction. Economists express reservations about spending substantial amounts of money on preventing environmental degradation. Aart and Wiebina Heesterman argue that there are inherent limitations in standard economics which cause blind spots in its environmental economics sub-field, as well as issues to do with simple lack of knowledge. In this timely book, the limitations of the neoclassical economics framework are examined. The authors explore the relationship between Keynesian aggregate economics and financial sustainability, as well as that between scale economies, locational economics and the understated cost of fuel for transport. The impact of economic theory on practice is examined. Conventional economic theory and political compromise bear unhelpfully on an energy market constrained by emissions targets. Rediscovering Sustainability is an invaluable aid to understanding for those teaching, studying, campaigning, policy-making, or involved with the science or politics of environmental and sustainability issues. It is also a book for those concerned with the application of economic theory in any context.
Vertaile hintoja
Opening Round

Opening Round

A.R. Elia

Lulu.com
2006
nidottu
By AR Elia. 257 Pages. Opening Round, the first book of The Tournament Series, takes the reader through the mystery, detective, sport and supernatural genres into a world of memorable characters who discover they are competing in a golf tournament of eternal importance. Learn more at: MuleBox.com
Vertaile hintoja
Telegraph

Telegraph

A.R. Elia

Lulu.com
2006
pokkari
By AR Elia. 300 Pages. Telegraph is the compelling and layered journey of lifelong friends on a quest to find a lost pyramid and the ultimate reward it may hold. The novel is an illuminating adventure, an exciting reading experience, intellectual and entertaining, offering a unique perspective on life. Learn more at: MuleBox.com
Vertaile hintoja
Next-Generation Batteries and Fuel Cells for Commercial, Military, and Space Applications

Next-Generation Batteries and Fuel Cells for Commercial, Military, and Space Applications

A.R. Jha

CRC Press Inc
2012
sidottu
Distilling complex theoretical physical concepts into an understandable technical framework, Next-Generation Batteries and Fuel Cells for Commercial, Military, and Space Applications describes primary and secondary (rechargeable) batteries for various commercial, military, spacecraft, and satellite applications for covert communications, surveillance, and reconnaissance missions. It emphasizes the cost, reliability, longevity, and safety of the next generation of high-capacity batteries for applications where high energy density, minimum weight and size, and reliability in harsh conditions are the principal performance requirements.Presenting cutting-edge battery design techniques backed by mathematical expressions and derivations wherever possible, the book supplies an authoritative account of emerging application requirements for small, lightweight, high-reliability rechargeable batteries—particularly for portable and implantable medical devices and diagnostic capsules. It devotes a chapter to fuel cells and describes the three distinct types of practical fuel cells, including those that use aqueous electrolytes, molten electrolytes, and solid electrolytes. Identifies critical performance parameters and limits of rechargeable batteries, including state of charge, depth of discharge, cycle life, discharge rate, and open-circuit voltageProvides a foundation in the basic laws of electrochemical kinetics Highlights performance capabilities of long-life, low-cost, rechargeable batteries, for particular applications in battlefield systems and unmanned aerial vehicles (UAVs )A.R. Jha, author of 10 books on alternative energy and other topics, outlines rechargeable battery requirements for electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs). He identifies the unique materials for electrolytes, cathodes, and anodes that are most cost-effective with significant improvements in weight, size, efficiency, reliability, safety, and longevity. Since electrode kinetics play a key role in the efficient operation of fuel cells, the book also provides you with a foundation in the basic laws of electrochemical kinetics.
Vertaile hintoja
1...484950