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autoencoders

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Journal Article
Journal: Geophysics
Published: 23 May 2023
Geophysics (2023) 88 (4): IM77–IM86.
...-kind active learning framework for seismic facies interpretation using the manifold learning properties of deep autoencoders. By jointly learning representations for supervised and unsupervised tasks and then ranking unlabeled samples by their nearness to the data manifold, we can identify the most...
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Journal Article
Journal: Geophysics
Published: 09 April 2018
Geophysics (2018) 83 (3): A39–A43.
... challenging. We have developed a novel data-driven offset-temporal feature extraction approach using the deep convolutional autoencoder (DCAE). As an unsupervised deep learning method, DCAE learns nonlinear, discriminant, and invariant features from unlabeled data. Then, seismic facies analysis can...
FIGURES
Journal Article
Journal: Geophysics
Published: 05 December 2023
Geophysics (2024) 89 (1): WA219–WA232.
... into geophysical inversions using conditional variational autoencoders (CVAEs). We train a CVAE to reconstruct training density models while honoring relative gravity data. Once trained, the decoder network of the CVAE inverts gravity data. The inputs to the decoder are observed gravity data and a set of latent...
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Journal Article
Journal: Interpretation
Published: 15 June 2022
Interpretation (2022) 10 (3): T451–T460.
... method by using a recurrent autoencoder model. First, we have constructed and trained an autoencoder architecture combined with long short-term memory-based recurrent operation. Its main aim is to learn the deep discriminative features by taking the windowed poststack seismic data as the input time...
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Journal Article
Journal: Geophysics
Published: 05 June 2020
Geophysics (2020) 85 (4): V367–V376.
...Omar M. Saad; Yangkang Chen ABSTRACT Attenuation of seismic random noise is considered an important processing step to enhance the signal-to-noise ratio of seismic data. A new approach is proposed to attenuate random noise based on a deep-denoising autoencoder (DDAE). In this approach, the time...
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Journal Article
Journal: Geophysics
Published: 08 June 2022
Geophysics (2022) 87 (4): IM125–IM132.
... of a particular interpreter present in conventional methods. A recently emerged group of seismic interpretation techniques is based on deep neural networks. These approaches are data-driven and require large labeled data sets for network training. We have developed a deep convolutional autoencoder...
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Journal Article
Published: 16 March 2021
Bulletin of the Seismological Society of America (2021) 111 (3): 1563–1576.
... use a data‐driven method, based on a deep‐learning autoencoder with a variable number of nodes in the bottleneck layer, to determine how many parameters are needed to reconstruct synthetic and observed ground‐motion data in terms of their median values and scatter. The reconstruction error...
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Journal Article
Journal: Geophysics
Published: 27 December 2021
Geophysics (2022) 87 (2): M43–M58.
... in nonlinear inverse problem solutions obtained from Markov chain Monte Carlo and ensemble-based data assimilation methods implemented in lower dimensional data and model spaces using a deep variational autoencoder. Our workflow is applied to two geophysical inverse problems for the prediction of reservoir...
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Journal Article
Journal: Geophysics
Published: 04 December 2023
Geophysics (2024) 89 (1): WA207–WA217.
... and continuously. Due to the thin turbidite layers in the reservoir, machine-learning-based prediction of sandstone thickness is challenging. Inspired by the autoencoder, we develop an open-source deep-learning workflow that combines unsupervised and supervised learning with jointed latent eigenvalues...
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Journal Article
Journal: Geophysics
Published: 16 October 2023
Geophysics (2024) 89 (1): WA67–WA83.
... based on a variational autoencoder (VAE) with a subdomain encoding scheme. Instead of encoding the entire domain of an investigation, we adopt a 1D subdomain encoding scheme to encode the 1D resistivity-depth models using a single VAE. The latent variables for the 2D model are a combination...
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Image
The four low-dimensional features extracted by <span class="search-highlight">autoencoder</span> using synthetic ...
Published: 05 January 2024
Figure 11. The four low-dimensional features extracted by autoencoder using synthetic data. (a) Autoencoder-1, (b) Autoencoder-2, (c) Autoencoder-3, and (d) Autoencoder-4, which correspond to a slice of the geologic model shown in Figure  5 .
Journal Article
Journal: Geophysics
Published: 24 June 2020
Geophysics (2020) 85 (4): O59–O70.
... reflection attributes. Both classes of attributes are fed into separate autoencoder networks of the same structure, to extract the underlying features. These features are then combined on the top of the Siamese network ( Rao et al., 2016 ) for a DNN correlation. At the final step, correlated attributes...
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Journal Article
Journal: Geophysics
Published: 30 January 2020
Geophysics (2020) 85 (2): V119–V130.
... have been studied for irregularly sampled data. Inspired by the working idea of the autoencoder and convolutional neural network, we have performed seismic trace interpolation by using the convolutional autoencoder (CAE). The irregularly sampled data are taken as corrupted data. By using a training...
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Image
Accuracy of 1D and 2D <span class="search-highlight">autoencoders</span>.
Published: 20 January 2022
Figure 2. Accuracy of 1D and 2D autoencoders.
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Mean absolute error (MAE) for <span class="search-highlight">autoencoders</span> with increasing code size,    k ...
Published: 16 March 2021
Figure 3. Mean absolute error (MAE) for autoencoders with increasing code size, k , based on different datasets: (a) synthetic 2D data, (b) synthetic 4D data, and (c) the real ESM data. For each dataset (2D, 4D, and ESM) and each considered code size, 50 autoencoders are trained based
Journal Article
Journal: The Leading Edge
Published: 01 June 2022
The Leading Edge (2022) 41 (6): 375–381.
.... The shot gathers are input to a convolutional neural network-based autoencoder, the output of which is used as the velocity model that is used to compute synthetic seismograms. The synthetic data are compared against observed input data, and the misfit is estimated. The gradient of the misfit with respect...
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Journal Article
Journal: Interpretation
Published: 20 January 2022
Interpretation (2022) 10 (1): T181–T193.
...Figure 2. Accuracy of 1D and 2D autoencoders. ...
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Journal Article
Journal: Geophysics
Published: 31 December 2019
Geophysics (2020) 85 (1): M15–M31.
... optimization methods on large seismic data volumes, we develop a deep representation learning method, namely, the deep convolutional autoencoder. Such a method is used to reduce the data dimensionality by sparsely and approximately representing the seismic data with a set of hidden features to capture...
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Model performance of <span class="search-highlight">autoencoder</span> on training set: (a) the input seismic att...
Published: 05 January 2024
Figure B-1. Model performance of autoencoder on training set: (a) the input seismic attribute and (b) the reconstruction by autoencoder.
Image
The training loss for the (a) U-Net and (b) <span class="search-highlight">autoencoder</span> models is depicted ...
Published: 25 July 2024
Figure 11. The training loss for the (a) U-Net and (b) autoencoder models is depicted alongside the IOU accuracy metrics for the (c) U-Net and (d) autoencoder. The blue line represents the training data, whereas the orange line represents the validation data.