Concept of Free Acoustic Field

A new concept of ocean acoustic tomography

Lionel CROS, Cédric GERVAISE, Isabelle QUIDU, Luc JAULIN, Yann STEPHAN (1) Laboratoire Extraction et Exploitation de l’Information en Environnements Incertains EA3876, 2 rue François Verny, 29806 Brest, France. E-mail: [email protected], [email protected], [email protected], [email protected] (2) Centre Militaire d’Océanographie (CMO), 13 rue Chatellier, 29603 Brest Na...

Reconstruction of Solar Coronal Linear Force-Free Magnetic Field

the influence of the neo-platonic concept of poetic imagination on wordsworth’s poetry

بر اساس نظریه افلاطون در باره شعر خلاقیت هنری مورد انتقاد قرار گرفته است. نظریه کلی در مورد شعر این بود که شعر از ظواهرتقلید میکند و نه حقیقت. چون سایه ای از حقیقت است. اما با پیدایش فلسفه نو افلاطونی، انتقاتات قبلی در مورد شعر و شاعری اصلاح شد. فلوطین در کتاب انئید، اساس خلق هنری را بر محور مُثل افلاطونی قرار داد. وی باور داشت که هنر مندان در خلق آثار هنری، تحت تاثیر مُثل افلاطونی بوده و عوالمی ...

Multicomponent distributed acoustic sensing: Concept and theory

Distributed acoustic sensing (DAS) data are increasingly used in geophysics. Lower in cost and higher in spatial resolution, DAS data are appealing, especially in boreholes in which optical fibers are readily available. DAS has the potential to become a permanent reservoir monitoring tool with a reduced sensing time interval. To accomplish this goal, it is critical that DAS can record all wave ...

Free-field Calibration of Mems Microphone Array Used for Acoustic Holography

The paper deals with method and methodology for calibration of the whole microphone array without the need of dismounting of each microphone and calibrating separately. This situation is usual with MEMS transducers which cannon be dismantled from the frame. The method is based on generation of spherical acoustic wave propagating in free-field and synchronously received by all microphones in the...