The Experts below are selected from a list of 6498 Experts worldwide ranked by ideXlab platform
Libing Bai - One of the best experts on this subject based on the ideXlab platform.
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fast Crack Profile reconstruction using pulsed eddy current signals
Ndt & E International, 2013Co-Authors: Libing Bai, Gui Yun Tian, Anthony Simm, Shulin Tian, Yuhua ChengAbstract:Abstract This paper reports fast Crack Profile reconstruction methods using transient slices and spectral components of pulsed eddy current (PEC) signals after a review of the state-of-the-art and current challenges. These methods provide initial approximate Profiles for Crack shape reconstruction, and have potential to reduce the computing time. Experimental samples, results, and reconstructions have been presented and discussed. Comparative studies of different Profile reconstructions using different PEC signals such as amplitude, phase, real and imaginary values of spectral components, transient slices, have also been conducted using reconstruction Mean Square Errors (MSE). The results show that the Profiles estimation using the imaginary values of spectral components is more stable and accurate than the others.
Yuhua Cheng - One of the best experts on this subject based on the ideXlab platform.
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fast Crack Profile reconstruction using pulsed eddy current signals
Ndt & E International, 2013Co-Authors: Libing Bai, Gui Yun Tian, Anthony Simm, Shulin Tian, Yuhua ChengAbstract:Abstract This paper reports fast Crack Profile reconstruction methods using transient slices and spectral components of pulsed eddy current (PEC) signals after a review of the state-of-the-art and current challenges. These methods provide initial approximate Profiles for Crack shape reconstruction, and have potential to reduce the computing time. Experimental samples, results, and reconstructions have been presented and discussed. Comparative studies of different Profile reconstructions using different PEC signals such as amplitude, phase, real and imaginary values of spectral components, transient slices, have also been conducted using reconstruction Mean Square Errors (MSE). The results show that the Profiles estimation using the imaginary values of spectral components is more stable and accurate than the others.
John F Hall - One of the best experts on this subject based on the ideXlab platform.
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shaking table study of concrete gravity dam monoliths
Earthquake Engineering & Structural Dynamics, 1991Co-Authors: William Patrick Donlon, John F HallAbstract:A series of shaking table tests was performed on three small-scale models of a monolith of a concrete gravity dam in order to simulate earthquake shaking. The purpose of the tests was to examine the nature of Crack formation in a gravity dam and the stability of the dam in the presence of Cracks. No failures occurred even though the levels of shaking employed were unrealistically high. The good performance owed to the development of Crack Profiles which had favourable orientations to resist sliding failures in each case. However, the development of an unfavourable Crack Profile, which cannot be ruled out, and the possibility of water intrusion into open Cracks, something not included in the experiments, could lead to failure under significantly lower levels of excitation than those employed.
Gui Yun Tian - One of the best experts on this subject based on the ideXlab platform.
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fast Crack Profile reconstruction using pulsed eddy current signals
Ndt & E International, 2013Co-Authors: Libing Bai, Gui Yun Tian, Anthony Simm, Shulin Tian, Yuhua ChengAbstract:Abstract This paper reports fast Crack Profile reconstruction methods using transient slices and spectral components of pulsed eddy current (PEC) signals after a review of the state-of-the-art and current challenges. These methods provide initial approximate Profiles for Crack shape reconstruction, and have potential to reduce the computing time. Experimental samples, results, and reconstructions have been presented and discussed. Comparative studies of different Profile reconstructions using different PEC signals such as amplitude, phase, real and imaginary values of spectral components, transient slices, have also been conducted using reconstruction Mean Square Errors (MSE). The results show that the Profiles estimation using the imaginary values of spectral components is more stable and accurate than the others.
William Patrick Donlon - One of the best experts on this subject based on the ideXlab platform.
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shaking table study of concrete gravity dam monoliths
Earthquake Engineering & Structural Dynamics, 1991Co-Authors: William Patrick Donlon, John F HallAbstract:A series of shaking table tests was performed on three small-scale models of a monolith of a concrete gravity dam in order to simulate earthquake shaking. The purpose of the tests was to examine the nature of Crack formation in a gravity dam and the stability of the dam in the presence of Cracks. No failures occurred even though the levels of shaking employed were unrealistically high. The good performance owed to the development of Crack Profiles which had favourable orientations to resist sliding failures in each case. However, the development of an unfavourable Crack Profile, which cannot be ruled out, and the possibility of water intrusion into open Cracks, something not included in the experiments, could lead to failure under significantly lower levels of excitation than those employed.