GERM
发表于 2025-3-21 17:34:12
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神经
发表于 2025-3-21 22:20:31
ative work, which even five years after its original appearance retains its freshness and interest with material not to date covered in other books on the subject (for example, see Horton [~Q], Stephens ). * In this Foreword we first concisely review the author‘s material, on a chapter-by-chapter basis, 978-1-4757-0476-1978-1-4757-0474-7
里程碑
发表于 2025-3-22 02:47:56
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新星
发表于 2025-3-22 06:01:00
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abstemious
发表于 2025-3-22 11:40:31
Marine Reverberation,attering could be caused by air bubbles, objects of biological origin (fish, crustaceans, microorganisms), temperature irregularities, unevenness of the sea surface, unevenness of the bottom, irregularities in the bottom’s composition, and so on.
Astigmatism
发表于 2025-3-22 15:17:35
Inverse Probability Problems in Sonar,g transformations of the emitted signal .(.): . where . is the operator for the emitting antenna, ., ., m., and m. are operators characterizing the effect of the conditions in which a signal propagates in the water medium, and . and . are operators representing the object of detection and the scatterers, respectively.
contradict
发表于 2025-3-22 19:08:36
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拒绝
发表于 2025-3-22 23:02:06
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hair-bulb
发表于 2025-3-23 01:26:52
The Emitted Signals,One of the important features of sonar as a method for studying underwater objects is the possibility for using different types of emitted signals.
Concomitant
发表于 2025-3-23 06:10:12
Problems of Detecting Echo Signals in the Presence of Interference,The first task in processing sonar information is detecting the echo signal reflected from the object of detection. The following factors are significant in the execution of this task for sonar :