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1. |
Record Nr. |
UNISA990000381320203316 |
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Titolo |
AIDS : prevention and control : invited presentations and papers from the world summit of ministers of health on programmers for AIDS prevention : jointly organized by the world health organization and the United Kingdom government, Queen Elizabeth 2. conference centre, Westminster, London, 26-28 january 1988 |
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Pubbl/distr/stampa |
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Oxford : Pergamon |
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Geneva : World Health organization |
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Descrizione fisica |
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Disciplina |
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Soggetti |
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Sindrome di immunodeficienza acquisita - Congressi |
Congressi - Londra - 1988 |
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Collocazione |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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2. |
Record Nr. |
UNISA990002325820203316 |
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Autore |
PUVIANI, Amilcare |
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Titolo |
Teoria della illusione finanziaria / Amilcare Puviani ; a cura di Franco Volpi |
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Pubbl/distr/stampa |
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Descrizione fisica |
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Collana |
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Classici dell'economia politica ; 13 |
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Disciplina |
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Soggetti |
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Finanza pubblica - Teorie |
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Collocazione |
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XXX.B. Coll. 75/ 6 (Coll. ASS 13) |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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3. |
Record Nr. |
UNINA9910141283903321 |
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Autore |
Gan Woon Siong |
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Titolo |
Acoustical imaging [[electronic resource] ] : techniques and applications for engineers / / Woon Siong Gan |
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Pubbl/distr/stampa |
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Chichester, West Sussex, U.K., : Wiley, 2012 |
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ISBN |
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1-5231-2337-0 |
1-119-94171-7 |
1-280-59268-0 |
9786613622518 |
1-119-94108-3 |
1-119-94107-5 |
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Descrizione fisica |
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1 online resource (437 p.) |
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Classificazione |
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Disciplina |
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Soggetti |
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Acoustic imaging |
Sound-waves - Scattering |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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ACOUSTICAL IMAGING; Contents; About the Author; Foreword; 1 Introduction; References; 2 Physics of Acoustics and Acoustical Imaging; 2.1 Introduction; 2.2 Sound Propagation in Solids; 2.2.1 Derivation of Linear Wave Equation of Motion and its Solutions; 2.2.2 Symmetries in Linear Acoustic Wave Equations and the New Stress Field Equation; 2.3 Use of Gauge Potential Theory to Solve Acoustic Wave Equations; 2.4 Propagation of Finite Wave Amplitude Sound Wave in Solids; 2.4.1 Higher-Order Elasticity Theory; 2.4.2 Nonlinear Effects; 2.4.3 Derivation of the Nonlinear Acoustic Equation of Motion |
2.4.4 Solutions of the Higher-Order Acoustics Equations of Motion2.5 Nonlinear Effects Due to Energy Absorption; 2.5.1 Energy Absorption Due to Thermal Conductivity; 2.5.2 Energy Absorption Due to Dislocation; 2.6 Gauge Theory Formulation of Sound Propagation in Solids; 2.6.1 Introduction of a Covariant Derivative in the Infinitesimal Amplitude Sound Wave Equation; 2.6.2 Introduction of Covariant Derivative to the Large Amplitude Sound Wave Equation; References; 3 Signal Processing; 3.1 Mathematical Tools in Signal Processing and Image Processing; 3.1.1 Matrix Theory |
3.1.2 Some Properties of Matrices3.1.3 Fourier Transformation; 3.1.4 The Z-Transform; 3.2 Image Enhancement; 3.2.1 Spatial Low-Pass, High-Pass and Band-Pass Filtering; 3.2.2 Magnification and Interpolation (Zooming); 3.2.3 Replication; 3.2.4 Linear Interpolation; 3.2.5 Transform Operation; 3.3 Image Sampling and Quantization; 3.3.1 Sampling versus Replication; 3.3.2 Reconstruction of the Image from its Samples; 3.3.3 Nyquist Rate; 3.3.4 Sampling Theorem; 3.3.5 Examples of Application of Two-Dimensional Sampling Theory; 3.3.6 Sampling Theorem for Radom Fields |
3.3.7 Practical Limitation in Sampling and Reconstruction3.3.8 Image Quantization; 3.4 Stochastic Modelling of Images; 3.4.1 Autoregressive Models; 3.4.2 Properties of AR Models; 3.4.3 Moving Average Model; 3.5 Beamforming; 3.5.1 Principles of Beamforming; 3.5.2 Sonar Beamforming Requirements; 3.6 Finite-Element Method; 3.6.1 Introduction; 3.6.2 Applications; 3.7 Boundary Element Method; 3.7.1 Comparison to Other Methods; References; 4 Common Methodologies of Acoustical Imaging; 4.1 Introduction; 4.2 Tomography; 4.2.1 The Born Approximation; 4.2.2 The Rytov Approximation |
4.2.3 The Fourier Diffraction Theorem4.2.4 Reconstruction and Backpropagation Algorithm; 4.3 Holography; 4.3.1 Liquid Surface Method; 4.4 Pulse-Echo and Transmission Modes; 4.4.1 C-Scan Method; 4.4.2 B-Scan Method; 4.5 Acoustic Microscopy; References; 5 Time-Reversal Acoustics and Superresolution; 5.1 Introduction; 5.2 Theory of Time-Reversal Acoustics; 5.2.1 Time-Reversal Acoustics and Superresolution; 5.3 Application of TR to Medical Ultrasound Imaging; 5.4 Application of Time-Reversal Acoustics to Ultrasonic Nondestructive Testing |
5.4.1 Theory of Time-Reversal Acoustics for Liquid-Solid Interface |
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Sommario/riassunto |
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"Acoustical Imaging starts with an introduction to the basic theories and principles of acoustics and acoustical imaging, then progresses to discuss its varied applications: nondestructive testing, medical imaging, underwater imaging and SONAR and geophysical exploration. The author draws together the different technologies, highlighting the similarities between topic areas and their common underlying theory. Some advanced topics are also described such as nonlinear acoustical imaging and its application in nondestructive testing, application of chaos theory to acoustical imaging, statistical treatment of acoustical |
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imaging and negative refraction"-- |
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