Description
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Model Overview
BERT is a method of pre-training language representations which obtains state-of-the-art results on a wide array of NLP tasks.
Model Architecture
The BERT model uses the same architecture as the encoder of the Transformer. Input sequences are projected into an embedding space before being fed into the encoder structure. Additionally, positional and segment encodings are added to the embeddings to preserve positional information. The encoder structure is simply a stack of Transformer blocks, which consist of a multi-head attention layer followed by successive stages of feed-forward networks and layer normalization. The multi-head attention layer accomplishes self-attention on multiple input representations.
An illustration of the architecture taken from the Transformer paper is shown below.
Training
This model was trained using script available on NGC and in GitHub repo
Dataset
The following datasets were used to train this model:
- Wikipedia - Dataset containing a 170GB+ Wikipedia dump.
- SQuAD 1.1 + 2.0 - Reading comprehension dataset, consisting of questions posed by crowdworkers on a set of Wikipedia articles, where the answer to every question is a segment of text, or span, from the corresponding reading passage, or the question might be unanswerable.
Performance
Performance numbers for this model are available in NGC
References
License
This model was trained using open-source software available in Deep Learning Examples repository. For terms of use, please refer to the license of the script and the datasets the model was derived from.