Understanding the Adjoint Method in Seismology: Theory and Implementation in the Time Domain

R Abreu - Surveys in Geophysics, 2024 - Springer
The adjoint method is a popular method used for seismic (full-waveform) inversion today.
The method is considered to give more realistic and detailed images of the interior of the …

A system for inspecting karst voids during construction of cast-in-place pile foundations

L Liu, Z Shi, S Li, M Peng, F Tao - Engineering Geology, 2023 - Elsevier
Karst voids at pile locations are highly adverse to the bearing capacity and construction
safety of cast-in-place pile foundations. This study developed an inspection system …

[HTML][HTML] Elastic wave CT with multistage inversion process based on improved SIRT

J Zhang, G Song, F Zhu, B Hu, H Zhang - Physics Letters A, 2024 - Elsevier
Elastic wave computerized tomography (CT) is a commonly used physical exploration
technique. This paper proposes a multistage inversion imaging method based on improved …

Field test of internal visualization of deep-water pile foundation using ultrasonic waves

Z Wang, Z Peng, Y Yan, K Liu… - Structural Health …, 2024 - journals.sagepub.com
Early-age internal visualization is critical for timely assessing the quality of pile foundations,
especially as super cross-sea bridges increase the diameter and length of pile foundations …

Estimating Young's moduli based on ultrasound and full-waveform inversion

S Schmid, C Hachmann, C Boehm, L Krischer… - Ultrasonics, 2024 - Elsevier
Ultrasound is commonly utilized to determine the dynamic Young's moduli for estimating
material deterioration or quantifying material parameters. This is either done with a …

Inner product preconditioned optimization methods for full waveform inversion

X Adriaens - 2022 - search.proquest.com
The interpretation of wave scattering data has led, and continues to lead, to a wide range of
scientific discoveries and practical engineering applications in domains as varied as …

Numerical Investigation of Full Waveform Tomography to Identify Anomalous Conditions and Untreated Zones in Jet Grout Columns

P Alidoust, JT Coe, Y Yang, A Kordjazi… - Geo-Congress …, 2023 - ascelibrary.org
Development of infrastructure in areas with poor subsurface soil conditions is often
encountered in civil engineering. In these situations, the engineering characteristics of …

Full Waveform Tomography of Parallel Seismic Data for Evaluation of Unknown Foundations

A Kordjazi, S Mahvelati, JT Coe, P Alidoust - Geo-Congress 2022, 2022 - ascelibrary.org
The evaluation of unknown foundations continues to be an important issue with the
increasing interest in foundation reuse and rehabilitation. Several nondestructive testing …

[HTML][HTML] The Non-destructive testing of bored piles

A Tulebekova, N Shakirova, A Zhankina, Y Muratov - Technobius, 2021 - cyberleninka.ru
Quality control of bored piles is a complex operation aimed at determining possible defects
in the pile shaft and the strength of the pile material made by different technologies. The …

Analysis of the Frequency Interaction of the Turbine Block in the Stand for the Magnitude of the Error in Measuring the Turbine's Power

A Petrochenkov, A Sal'nikov, S Bochkarev, P Ilyushin - Applied Sciences, 2021 - mdpi.com
An algorithm for constructing a dynamic analysis during the formation of a wave field of
stand for testing turbines and the effect of the frequency interaction of the stand's elements …