Results 131 to 140 of about 2,299,265 (280)

Study on the Numerical Simulation of Array Sonic Logging Responses and Their Velocity Dispersion Characteristics in Fractured Formation

CT Lilun yu yingyong yanjiu
To understand the effects of fractured formation on the responses of array sonic logging, the wave propagation of array acoustic logging was simulated based on the staggered grid finite difference method and poroelastic theory.
Hui LUO, Jinsong SHEN, Wenxue ZHANG, Shuai SUN, Zhe’an ZHANG, Qian WANG, Xuemin LIN   +6 more
doaj   +1 more source

Dips in Sound-Velocity Dispersion Curves for Relaxing Liquids [PDF]

, 1969
William H. Nichols
openalex   +1 more source

Seismic attenuation and velocity dispersion in heterogeneous partially saturated porous rocks

, 2012
SUMMARY Using a numerical approach, we explore wave-induced fluid flow effects in partially saturated porous rocks in which the gas–water saturation patterns are governed by mesoscopic heterogeneities associated with the dry frame properties. The link
J. Rubino, K. Holliger
semanticscholar   +1 more source

Velocity Dispersion of the Open Cluster NGC 2571 by Radial Velocities and Proper Motions

The Astronomical Journal
We use a kernel density estimator method to evaluate the stellar velocity dispersion in the open cluster NGC 2571. We derive the 3D velocity dispersion using both proper motions as extracted from Gaia Data Release 3 and single-epoch radial velocities as ...
Maxim V. Kulesh, Aleksandra E. Samirkhanova, Giovanni Carraro, Joao V. Sales-Silva, Roberto Capuzzo Dolcetta, Anton F. Seleznev   +5 more
doaj   +1 more source

Regular perturbation on the group-velocity dispersion parameter for nonlinear fibre-optical communications. [PDF]

Nat Commun, 2020
Oliari V, Agrell E, Alvarado A.
europepmc   +1 more source

Velocity−dispersion measurements in liquids between 3.3 MHz and 70.2 MHz [PDF]

, 1975
D. Rogez, Martin Karl‐Friedrich Bader
openalex   +1 more source

Visualization of the Anisotropy of the Velocity Dispersion and Characteristics of the Multi-Velocity Continuum in the Regions of Multi-Stream Flows of Gas-Dust Media with Polydisperse Dust. [PDF]

J Imaging, 2020
Bezborodov MA, Eremin MA, Korolev VV, Kovalenko IG, Zhukova EV.   +4 more
europepmc   +1 more source

NEAR SURFACE VELOCITY STRUCTURE OF ANDALUCIA (SOUTHERN SPAIN) AND ALBORAN SEA REGION FROM 0.15-2.0 HZ RAYLEIGH WAVES

Tecnociencia, 2004
  A methodology that has been applied for a relatively short time on Seismology is the modelling of very shallow structures from the inversion of dispersion values (group velocity of short period Rg waves).
M. Chourak, M. Navarro, J. Badal
doaj  

Velocity Dispersion in the Bulge of M31; Dynamical Model [PDF]

, 1978
G. Monnet, A. Pellet, F. Simien
openalex   +1 more source

Shear–Gravity Transition Determines the Steep Velocity Dispersion–Size Relation in Molecular Clouds: Confronting Analytical Formula with Observations

The Astrophysical Journal Letters
The velocity dispersion–size relation ( σ _v  ∼  R ^β ) is a crucial indicator of the dynamic properties of interstellar gas, where the slope is considered as β  ∼ 0.5. Recent observations reveal a steep velocity dispersion–size relation with the slope β
Yi-Heng Xie, Guang-Xing Li
doaj   +1 more source