Real-time systems are defined as those for which correctness depends not only on the logical properties of the produced results, but also on the temporal properties of these results. In a database, real-time means ...
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ISBN:
(数字)9781461560692
ISBN:
(纸本)9780792380115;9781461377801
Real-time systems are defined as those for which correctness depends not only on the logical properties of the produced results, but also on the temporal properties of these results. In a database, real-time means that in addition to typical logical consistency constraints, such as a constraint on a data item's value, there are constraints on when transactions execute and on the `freshness' of the data transactions access.;The challenges and tradeoffs faced by the designers of real-time database systems are quite different from those faced by the designers of general-purpose database systems. To achieve the fundamental requirements of timeliness and predictability, not only do conventional methods for scheduling and transaction management have to be redesigned, but also new concepts that have not been considered in conventional database systems or in real-time systems need to be added.;is devoted to new techniques for scheduling of transactions, concurrency management, transaction logging, database languages, and new distributed database architectures.;is primarily intended for practicing engineers and researchers working in the growing area of real-time database and information retrieval systems. For practitioners, the book will provide a much needed bridge for technology transfer and continued education. For researchers, the book will provide a comprehensive reference for well-established results. The book can also be used in a senior or graduate level course on real-time systems, real-time database systems, and database systems, or closely related courses.
presents the results of the ESPRIT WIDE project on advanced database support for workflow management. The book discusses the state of the art in combining database management and workflow management technology, esp...
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ISBN:
(数字)9781461551713
ISBN:
(纸本)9780792384144;9781461373551
presents the results of the ESPRIT WIDE project on advanced database support for workflow management. The book discusses the state of the art in combining database management and workflow management technology, especially in the areas of transaction and exception management. This technology is complemented by a high-level conceptual workflow model and associated workflow application design methodology. In WIDE, advanced base technology is applied, like a distributed computing model based on the corba standard. The usability of the WIDE approach is documented in this book by a discussion of two real-world applications from the insurance and health care domains.;serves as an excellent reference, and may be used for advanced courses on database and workflow management systems.
provides a new treatment of figure-ground segmentation in scenes comprising transparent, translucent, or opaque objects. Exploiting the relative motion between figure and ground, this technique deals explicitly wit...
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ISBN:
(数字)9781461514138
ISBN:
(纸本)9780792374138;9781461355410
provides a new treatment of figure-ground segmentation in scenes comprising transparent, translucent, or opaque objects. Exploiting the relative motion between figure and ground, this technique deals explicitly with the separation of additive signals and makes no assumptions about the spatial or spectral content of the images, with segmentation being carried out phasor by phasor in the Fourier domain. It works with several camera configurations, such as camera motion and short-baseline binocular stereo, and performs best on images with small velocities/displacements, typically one to ten pixels per frame. The book also addresses the use of Fourier techniques to estimate stereo disparity and optical flow. Numerous examples are provided throughout.;will be of value to researchers in image processing & computer vision and, especially, to those who have to deal with superimposed transparent or translucent objects. Researchers in application areas such as medical imaging and acoustic signal processing will also find this of interest.
The function of a filter is to transform a signal into another one more suit able for a given purpose. As such, filters find applications in telecommunica tions, radar, sonar, remote sensing, geophysical s...
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ISBN:
(数字)9781475760170
ISBN:
(纸本)9780792390497;9781441951205
The function of a filter is to transform a signal into another one more suit able for a given purpose. As such, filters find applications in telecommunica tions, radar, sonar, remote sensing, geophysical signal processing, image pro cessing, and computer vision. Numerous authors have considered deterministic and statistical approaches for the study of passive, active, digital, multidimen sional, and adaptive filters. Most of the filters considered were linear although the theory of nonlinear filters is developing rapidly, as it is evident by the numerous research papers and a few specialized monographs now available. Our research interests in this area created opportunity for cooperation and co authored publications during the past few years in many nonlinear filter families described in this book. As a result of this cooperation and a visit from John Pitas on a research leave at the University of Toronto in September 1988, the idea for this book was first conceived. The difficulty in writing such a mono graph was that the area seemed fragmented and no general theory was available to encompass the many different kinds of filters presented in the literature. However, the similarities of some families of nonlinear filters and the need for such a monograph providing a broad overview of the whole area made the pro ject worthwhile. The result is the book now in your hands, typeset at the Department of Electrical engineering of the University of Toronto during the summer of 1989.
Traditionally, say 15 years ago, three-dimensional image analysis (aka computer vi sion) and three-dimensional image synthesis (aka computer graphics) were separate fields. Rarely were expert
ISBN:
(数字)9781475731866
ISBN:
(纸本)9780792378501;9781441949820
Traditionally, say 15 years ago, three-dimensional image analysis (aka computer vi sion) and three-dimensional image synthesis (aka computer graphics) were separate fields. Rarely were expert
Something for Everyone If this book is to succeed and help readers, its cardinal virtue must be to provide a simple reference text. It should be an essential addition to an information security library. As such it sho...
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ISBN:
(数字)9781402079276
ISBN:
(纸本)9781402078897;9781441954473
Something for Everyone If this book is to succeed and help readers, its cardinal virtue must be to provide a simple reference text. It should be an essential addition to an information security library. As such it should also serve the purpose of being a quick refresher for terms the reader has not seen since the days when one attended a computing science program, information security course or workshop. As a reference work, THE INFORMATION SECURITY DICTIONARY provides a relatively complete and easy-to-read explanation of common se- rity, malware, vulnerability and infrastructure protection terms, without causing much damage to the usually slim student pocketbook. This dictionary can help non-specialistreaders better understand the infor- tion security issues encountered in their work or studying for their certification examination or whilst doing a practical assignment as part of a workshop. This book is also essential to a reference collection for an organization’s system personnel. Special attention is paid to terms which most often prevent educated readers from understanding journal articles and books in cryptology, computing science, and information systems, in addition to applied fields that build on those disciplines, such as system design, security auditing, vulnera- lity testing, and role-based access management. The dictionary provides defi- tions that enable readers to get through a difficult article or passage. We do not, for the most part, directly explain how to conduct research or how to implement the terms briefly described.
presents a systematic physics-based framework for modeling rigid, articulated, and deformable objects, their interactions with the physical world, and the estimate of their shape and motion from visual data. This b...
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ISBN:
(数字)9781461563358
ISBN:
(纸本)9780792398400;9781461379096
presents a systematic physics-based framework for modeling rigid, articulated, and deformable objects, their interactions with the physical world, and the estimate of their shape and motion from visual data. This book presents a large variety of methods and associated experiments in computer vision, graphics and medical imaging that help the reader better to understand the presented material. In addition, special emphasis has been given to the development of techniques with interactive or close to real-time performance.;is suitable as a secondary text for graduate level courses in computer Graphics, Computational Physics, computer Vision, Medical Imaging, and Biomedical engineering. In addition, this book is appropriate as a reference for researchers and practitioners in the above-mentioned fields.
One of the most enjoyable experiences in science is hearing a simple but novel idea which instantly rings true, and whose consequences then begin to unfold in unforeseen directions. For me, this book presents such an ...
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ISBN:
(数字)9781461315575
ISBN:
(纸本)9780792391197;9781461288343
One of the most enjoyable experiences in science is hearing a simple but novel idea which instantly rings true, and whose consequences then begin to unfold in unforeseen directions. For me, this book presents such an idea and several of its ramifications. This book is concerned with machine learning. It focuses on a ques tion that is central to understanding how computers might learn: "how can a computer acquire the definition of some general concept by abstracting from specific training instances of the concept?" Although this question of how to automatically generalize from examples has been considered by many researchers over several decades, it remains only partly answered. The approach developed in this book, based on Haym Hirsh's Ph.D. dis sertation, leads to an algorithm which efficiently and exhaustively searches a space of hypotheses (possible generalizations of the data) to find all maxi mally consistent hypotheses, even in the presence of certain types of incon sistencies in the data. More generally, it provides a framework for integrat ing different types of constraints (e.g., training examples, prior knowledge) which allow the learner to reduce the set of hypotheses under consideration.
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