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Living resources of the sea and freshwater have long been an important source of food and economic activity. With fish stocks continuing to be over-exploited, there is a clear focus on fisheries management, to which acoustic methods can and do make an important contribution. The second edition of this widely used book covers the many technological developments which have occurred since the first edition ; highly sophisticated sonar and computer processing equipment offer great new opportunities and Fisheries Acoustics, 2e provides the reader with a better understanding of how to interpret acoustic observations and put them to practical use. A vital tool for fisheries scientists, fisheries oceanographers, environmental biologists, ecologists, population biologists, fish biologists, and marine biologists. All those involved with design and use of acoustic equipment. Libraries in research establishments, government stations and universities where fisheries science is studied or taught will find this a welcome addition to their shelves.

Fishes --- Poissons --- Detection. --- Détection.

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Cancer --- Detection

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The task of signal detection is deciding whether signals of interest exist by using their observed data. Furthermore, signals are reconstructed or their key parameters are estimated from the observations in the task of signal recovery. Sparsity is a natural characteristic of most of signals in practice. The fact that multiple sparse signals share the common locations of dominant coefficients is called by joint sparsity. In the context of signal processing, joint sparsity model results in higher performance of signal detection and recovery. This book focuses on the task of detecting and reconstructing signals with joint sparsity. The main contents include key methods for detection of joint sparse signals and their corresponding theoretical performance analysis, and methods for joint sparse signal recovery and their application in the context of radar imaging.

Signal detection.

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This paper presents a draft Decision that reflects the guidance provided by the Board. In February, the Board endorsed three overarching principles to guide a new Decision: (i) no new obligations for members, together with confirmation that dialogue and persuasion are key pillars of surveillance; (ii) due regard for country circumstances and emphasis on the need for evenhandedness; and (iii) continued flexibility.

Surveillance detection.

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This paper presents a draft Decision that reflects the guidance provided by the Board. In February, the Board endorsed three overarching principles to guide a new Decision: (i) no new obligations for members, together with confirmation that dialogue and persuasion are key pillars of surveillance; (ii) due regard for country circumstances and emphasis on the need for evenhandedness; and (iii) continued flexibility.

Surveillance detection.