Long Short-Term Memory

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Dongxiao Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Ensemble Long Short-Term Memory (EnLSTM) network
    Geophysical Research Letters, 2020
    Co-Authors: Yuntian Chen, Dongxiao Zhang
    Abstract:

    In this study, we propose an ensemble Long Short-Term Memory (EnLSTM) network, which can be trained on a small dataset and process sequential data. The EnLSTM is built by combining the ensemble neural network (ENN) and the cascaded Long Short-Term Memory (C-LSTM) network to leverage their complementary strengths. In order to resolve the issues of over-convergence and disturbance compensation associated with training failure owing to the nature of small-data problems, model parameter perturbation and high-fidelity observation perturbation methods are introduced. The EnLSTM is compared with commonly-used models on a published dataset, and proven to be the state-of-the-art model in generating well logs with a mean-square-error (MSE) reduction of 34%. In the case study, 12 well logs that cannot be measured while drilling are generated based on logging-while-drilling (LWD) data. The EnLSTM is capable to reduce cost and save time in practice.

Wermterstefan - One of the best experts on this subject based on the ideXlab platform.

Yuntian Chen - One of the best experts on this subject based on the ideXlab platform.

  • Ensemble Long Short-Term Memory (EnLSTM) network
    Geophysical Research Letters, 2020
    Co-Authors: Yuntian Chen, Dongxiao Zhang
    Abstract:

    In this study, we propose an ensemble Long Short-Term Memory (EnLSTM) network, which can be trained on a small dataset and process sequential data. The EnLSTM is built by combining the ensemble neural network (ENN) and the cascaded Long Short-Term Memory (C-LSTM) network to leverage their complementary strengths. In order to resolve the issues of over-convergence and disturbance compensation associated with training failure owing to the nature of small-data problems, model parameter perturbation and high-fidelity observation perturbation methods are introduced. The EnLSTM is compared with commonly-used models on a published dataset, and proven to be the state-of-the-art model in generating well logs with a mean-square-error (MSE) reduction of 34%. In the case study, 12 well logs that cannot be measured while drilling are generated based on logging-while-drilling (LWD) data. The EnLSTM is capable to reduce cost and save time in practice.

Claire J Tomlin - One of the best experts on this subject based on the ideXlab platform.

Wei Wei - One of the best experts on this subject based on the ideXlab platform.

  • Sleep staging by bidirectional Long Short-Term Memory convolution neural network
    Future Generation Computer Systems, 2020
    Co-Authors: Xueyan Chen, Wei Yan, Wei Wei
    Abstract:

    Abstract Sleep is an indispensable physiological activity for human beings, which can supplement, enhance resistance, promote the normal growth and development, gets sufficient rest of human body. Therefore, the research of sleeping is important for people’s healthy. Sleep classification is the basis for studying sleep. Polysomnography (PSG), also known as sleep electroencephalography, is mainly used for analysis of sleep classification. Both automatic and manual classification of sleep stage are commonly used classification methods. However, compared with manual classification method the automatic classification method has inconvenient advantage, for example it can improve the efficiency and obtain more objective result. In this paper, combined the bidirectional Long Short-Term Memory recurrent neural network and convolution neural network (CNN), named bidirectional Long Short-Term Memory convolution neural network (Bi-LSTM–CNN), to perform automatic sleep classification with multichannel sleep data (electroencephalogram, electro-oculogram and electromyography). The average accuracy for 39 samples is 89.4%, 84.8% and 81.6% by cross-validation by Bi-LSTM–CNN, Bi-LSTM and LSTM–RNN,​ respectively. Bi-LSTM–CNN is an effective signal processing method, which can efficiently improve the accuracy of sleep classification, and has good application prospects.