scholarly journals Dispersion estimation from linear array data in the time-frequency plane

2005 ◽  
Vol 53 (10) ◽  
pp. 3738-3748 ◽  
Author(s):  
A. Roueff ◽  
J.I. Mars ◽  
J. Chanussot ◽  
H. Pedersen
Keyword(s):  
Linear Array ◽  
Array Data ◽  
Time Frequency

Underdetermined Blind Identification for Uniform Linear Array by a New Time–Frequency Method

2016 ◽  
Vol 36 (1) ◽  
pp. 99-118 ◽  
Author(s):  
Qiao Su ◽  
Yuehong Shen ◽  
Wei Jian ◽  
Pengcheng Xu ◽  
Wei Zhao
Keyword(s):  
Linear Array ◽  
Blind Identification ◽  
Uniform Linear Array ◽  
Frequency Method ◽  
Time Frequency ◽  
New Time

scholarly journals High resolution tomography of the Tanlu fault zone near Hefei with passive seismic and magnetotelluric linear array data

2021 ◽  
Vol 34 (1) ◽  
pp. 1-12
Author(s):  
Jian Xu ◽  
◽  
Kangdong Wang ◽  
Junlun Li ◽  
Ning Gu ◽  
...  
Keyword(s):  
High Resolution ◽  
Fault Zone ◽  
Linear Array ◽  
Array Data ◽  
Tanlu Fault Zone ◽  
Tanlu Fault ◽  
Passive Seismic

Linear array data gathering for microearthquake observation: Survey of mid-crustal reflectors

1993 ◽  
Vol 20 (5) ◽  
pp. 411-414 ◽  
Author(s):  
K. Katsumata ◽  
S. Tsukada ◽  
I. Ogino ◽  
M. Mizoue
Keyword(s):  
Linear Array ◽  
Data Gathering ◽  
Array Data

scholarly journals Modal wavenumber extraction by finite difference vertical linear array data

2021 ◽  
Vol 1 (12) ◽  
pp. 126002
Author(s):  
Xiaolei Li ◽  
Pengyu Wang
Keyword(s):  
Finite Difference ◽  
Linear Array ◽  
Array Data

scholarly journals Multi-mode analysis of Rayleigh-type Lg. Part 1. Theory and applicability of the method

1981 ◽  
Vol 71 (4) ◽  
pp. 973-984 ◽  
Author(s):  
Michel Cara ◽  
J. Bernard Minster
Keyword(s):  
Linear Array ◽  
Random Phase ◽  
Mode Analysis ◽  
Phase Fluctuations ◽  
Time Frequency ◽  
Analysis Technique ◽  
Crustal Structures ◽  
Velocity Changes ◽  
Multi Mode ◽  
Lateral Heterogeneities

abstract Rayleigh-type Lg propagating in a laterally homogeneous continental crust can be synthesized by adding only a few overtones at periods greater than 2 sec. Under minimal assumptions, we show that wavenumber analysis of Lg recorded on a several hundred kilometers long linear array of 10 stations allow us to isolate the different overtones, providing a tool to study crustal structures and excitation of the overtones at the source. In this first paper, we use synthetic Lg seismograms to investigate the applicability of a time-frequency-wavenumber analysis technique (UC diagram algorithm) to realistic arrays of stations. The behavior of the algorithm in the presence of lateral heterogeneities is studied numerically by introducing either random or coherent phase perturbations. We find that (1) the method is tractable if random phase fluctuations from station to station are spread over less than half a cycle, and (2) coherent velocity changes between two halves of a profile are spatially averaged if they are too small to be resolved by the array.

Non-linear array data dependence test

2001 ◽  
Vol 57 (2) ◽  
pp. 145-154
Author(s):  
Tsung-Chuan Huang ◽  
Cheng-Ming Yang
Keyword(s):  
Linear Array ◽  
Data Dependence ◽  
Array Data ◽  
Non Linear

Adaptive Imaging in Aberrating Media: A Broadband Algorithm

1992 ◽  
Vol 14 (3) ◽  
pp. 300-321 ◽  
Author(s):  
Stephen J. Norton
Keyword(s):  
Composite Material ◽  
Time Domain ◽  
Adaptive Algorithm ◽  
Heterogeneous Media ◽  
Linear Array ◽  
Scattering Data ◽  
Array Data ◽  
Adaptive Imaging ◽  
Array Imaging

An adaptive algorithm is derived for imaging in an aberrating medium based on wideband (time-domain) linear array data. Image reconstructions using simulated scattering data are presented. An analogy is also drawn between broadband array imaging and limited-angle tomography. This analogy suggests some tomographic-like filtering schemes that can be applied to improve the quality of the image. The algorithm is designed for imaging in composite material, although the imaging of other heterogeneous media such as tissue may be feasible under certain conditions.

Umatilla Virus Association with Fibrils and Tubules in Cultured Cells

1980 ◽  
Vol 38 ◽  
pp. 476-477
Author(s):  
Neil M. Foster ◽  
Ruth D. Breckon
Keyword(s):  
Bluetongue Virus ◽  
Linear Array ◽  
Cultured Cells ◽  
Intimate Association ◽  
Infected Cells ◽  
Dark Staining ◽  
In Cells

Macrotubules have been described1 in cells infected with Umatilla virus (UMAV), an orbivirus for which bluetongue virus (BTV) is the protype. Macrotubules, often in linear array, were observed in the cytoplasm and in intimate association with viroplasms of infected cells. Macrotubules had outside and inside diameters of 20 and 15 nm and many had dark-staining centers with diameters similar to the interiors of the tubules. UMAV was 60 nm and the RNA core was 30 nm in diameter. This report describes the association of UMAV with macrotubules and two types of microtubules.

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