Three-dimensional noise field directionality estimation from single-line towed array data

1997 ◽  
Vol 102 (2) ◽  
pp. 1023-1031 ◽  
Author(s):  
Ronald A. Wagstaff ◽  
J. Newcomb
Keyword(s):  
Three Dimensional ◽  
Single Line ◽  
Array Data ◽  
Noise Field ◽  
Towed Array

Subbottom profile of ARSRP sediment pond as determined from vertical towed array data

1998 ◽  
Vol 18 (3) ◽  
pp. 247-250
Author(s):  
A. K. Kalra ◽  
J. A. Showalter ◽  
J. K. Fulford
Keyword(s):  
Array Data ◽  
Subbottom Profile ◽  
Towed Array

Geoacoustic characterization of a range‐dependent environment using towed array data

2003 ◽  
Vol 113 (4) ◽  
pp. 2217-2217
Author(s):  
Mark Fallat ◽  
Peter Nielsen ◽  
Martin Siderius
Keyword(s):  
Array Data ◽  
Towed Array

Active invariance structure in deep water towed array data.

2010 ◽  
Vol 128 (4) ◽  
pp. 2462-2462
Author(s):  
Lisa M. Zurk ◽  
Zoi‐Heleni Michalopoulou ◽  
Dan Rouseff
Keyword(s):  
Deep Water ◽  
Array Data ◽  
Towed Array

scholarly journals Tunable, Anisotropic Permeability and Spatial Flow of SLM Manufactured Structures

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5205
Author(s):  
Babette Goetzendorfer ◽  
Hannah Kirchgaessner ◽  
Ralf Hellmann
Keyword(s):  
Process Parameters ◽  
Three Dimensional ◽  
Melting Process ◽  
Initial Step ◽  
Honeycomb Structure ◽  
Single Line ◽  
Anisotropic Permeability ◽  
Spatial Direction ◽  
Mathematical Correlation ◽  
Novel Approach

In this study, we report on a novel approach to produce defined porous selectively laser molten structures with predictable anisotropic permeability. For this purpose, in an initial step, the smallest possible wall proximity distance for selectively laser molten structures is investigated by applying a single line scan strategy. The obtained parameters are adapted to a rectangular and, subsequently, to a more complex honeycomb structure. As variation of the hatch distance directly affects the pore size, and thus the resulting porosity and finally permeability, we, in addition, propose and verify a mathematical correlation between selective laser melting process parameters, porosity, and permeability. Moreover, a triangular based anisotropic single line selectively laser molten structure is introduced, which offers the possibility of controlling the three-dimensional flow ratio of passing fluids. Basically, one spatial direction exhibits unhindered flow, whereas the second nearly completely prohibits any passage of the fluid. The amount to which the remaining orientation accounts for is controlled by spreading the basic triangular structure by variation of the included angle. As acute angles yield low passage ratios of 0.25 relative to continuous flow, more obtuse angles show increased ratios up to equal bidirectional flow. Hence, this novel procedure permits (for the first time) fabrication of selective laser molten structures with adjustable permeable properties independent of the applied process parameters.

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