On the current experiment

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Oleg Zaikin
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Message 204 - Posted: 14 May 2018, 9:32:02 UTC

In the current experiment, we study the accuracy of the sound speed profile reconstruction in a shallow-water waveguide using a dispersion-based geoacoustic inversion scheme. This problem was transformed into a problem of black-box minimization of a certain mismatch function. A sound speed profile is considered a piecewise-linear function with fixed uniformly-spaced nodes. At these nodes, the values of sound speed are obtained in the course of inversion. The main novelty is that the depths of the sound speed profile nodes are also considered inversion parameters. Note, that in the previous experiment held in Autumn 2017 the depths were constant.

В текущем эксперименте исследуется точность восстановления профиля скорости звука в волноводе мелкого моря с использованием схемы обращения, основанной на данных дисперсии. Эта задача была сведена к задаче оптимизации вида 'черный ящик'. Профиль скорости звука рассмотрен как линейно-кусочная функция с фиксированными узлами, расположенными равномерно. Значения профиля скорости звука в этих узлах вычисляются в результате решения задачи обращения. Основной новизной является то, что глубины профиля скорости звука также рассматриваются как варьиреумые параметры. Отметим, что в предыдущем эксперименте, проведенном осенью 2017 года, значения глубин были константными.
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John Rowlands

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Message 234 - Posted: 27 Jul 2018, 7:54:25 UTC - in response to Message 204.  

I'm afraid much of the 'news', mindful this is partly a citizen science-type project, falls into the trap of forgetting that many people are not acoustics experts.

Outreach requires good writing skills that convey complex ides by way of meaningful parallels people can relate to and understand. All I can see is writing so dry and aimed at the scientific press that it falls into illiteracy.
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Message 235 - Posted: 27 Jul 2018, 9:19:18 UTC - in response to Message 234.  
Last modified: 27 Jul 2018, 9:20:22 UTC

There is also a presentation somewhere that has pictures if I can remember where to find it.
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Message boards : News : On the current experiment