Results 31 to 40 of about 607,204 (294)

Fast Inversion of Air-Coupled Spectral Analysis of Surface Wave (SASW) Using in situ Particle Displacement

open access: yesISPRS International Journal of Geo-Information, 2015
Spectral Analysis of Surface Wave (SASW) is widely used in nondestructive subsurface profiling for geological sites. The air-coupled SASW is an extension from conventional SASW methods by replacing ground-mounted accelerometers with non-contact ...
Yifeng Lu   +3 more
doaj   +1 more source

Inversion of microtremor recordings dispersion curve based on geological unit

open access: yes矿业科学学报, 2022
The urban microtremor exploration technology is a method that detects urban underground structures by using the weak vibration of environment.The surface wave is dominant in the microtremor recordings, and the surface wave dispersion curve can be ...
Zhao Hongpeng, He Dengke, Hong Yü
doaj   +1 more source

Application of Microtremor Survey Technology in a Coal Mine Goaf

open access: yesApplied Sciences, 2022
Goafs are one of the main factors that endanger the safety of mining areas, leading to roadway collapse, land subsidence and other problems. Determining how to detect goafs accurately and efficiently is an important issue faced in engineering geophysical
Chuantao Yu, Zheng Wang, Mingyu Tang
doaj   +1 more source

Dispersion points and rational curves [PDF]

open access: yesProceedings of the American Mathematical Society, 2020
We construct two connected plane sets which can be embedded into rational curves. The first is a biconnected set with a dispersion point. It answers a question of Joachim Grispolakis. The second is indecomposable. Both examples are completely metrizable.
openaire   +2 more sources

Lam\'e polynomials, hyperelliptic reductions and Lam\'e band structure

open access: yes, 2004
The band structure of the Lam\'e equation, viewed as a one-dimensional Schr\"odinger equation with a periodic potential, is studied. At integer values of the degree parameter l, the dispersion relation is reduced to the l=1 dispersion relation, and a ...
Arscott F.M   +11 more
core   +1 more source

Inversion of Rayleigh wave dispersion curves based on antlion optimizer

open access: yes地质科技通报, 2023
Inverting Rayleigh wave dispersion curves to obtain S-wave velocity profiles is one of the most important steps in near-surface Rayleigh wave exploration.
Yiming Wang   +2 more
doaj   +1 more source

Influence of Anomalous Dispersion on Optical Characteristics of Quantum Wells

open access: yes, 2006
Frequency dependencies of optical characteristics (reflection, transmission and absorption of light) of a quantum well are investigated in a vicinity of interband resonant transitions in a case of two closely located excited energy levels. A wide quantum
D. A. Contreras-Solorio   +30 more
core   +1 more source

Study on dispersion characteristics of square solid-core photonic crystal fibers with As2S3 substrate

open access: yesTạp chí Khoa học, 2022
The dispersion characteristics of As2S3 solid-core photonic crystal fibers were investigated with the change of structural parameters including filling factor (d/Λ) and lattice constant (Λ).
DANG Van Trong   +4 more
doaj   +1 more source

Mode Bifurcation and Fold Points of Complex Dispersion Curves for the Metamaterial Goubau Line

open access: yes, 2009
In this paper the complex dispersion curves of the four lowest-order transverse magnetic modes of a dielectric Goubau line ($\epsilon>0, \mu>0$) are compared with those of a dispersive metamaterial Goubau line.
D. R. Bowling   +9 more
core   +1 more source

Determination of oscillator strength of confined excitons in a semiconductor microcavity [PDF]

open access: yes, 2014
We have achieved a significant experimental Rabi-splitting (3.4 meV) for confined polaritons in a planar semiconductor $\lambda$ microcavity for only a single quantum well (SQW) of GaAs (10 nm) placed at the antinode.
Cotta, E. A., Roma, P. M. S.
core   +4 more sources

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