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README.md
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- wikipedia
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---
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# MultiBERTs Seed 23 (uncased)
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Seed 23 pretrained BERT model on English language using a masked language modeling (MLM) objective. It was introduced in
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[this paper](https://arxiv.org/pdf/2106.16163.pdf) and first released in
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[this repository](https://github.com/google-research/language/tree/master/language/multiberts). This model is uncased: it does not make a difference
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between english and English.
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Disclaimer: The team releasing MultiBERTs did not write a model card for this model so this model card has been written by [gchhablani](https://hf.co/gchhablani).
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## Model description
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MultiBERTs models are transformers model pretrained on a large corpus of English data in a self-supervised fashion. This means it
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was pretrained on the raw texts only, with no humans labelling them in any way (which is why it can use lots of
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predict if the two sentences were following each other or not.
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This way, the model learns an inner representation of the English language that can then be used to extract features
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useful for downstream tasks: if you have a dataset of labeled sentences for instance, you can train a standard
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classifier using the features produced by the
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## Intended uses & limitations
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You can use the raw model for either masked language modeling or next sentence prediction, but it's mostly intended to
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be fine-tuned on a downstream task. See the [model hub](https://huggingface.co/models?filter=
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fine-tuned versions on a task that interests you.
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Note that this model is primarily aimed at being fine-tuned on tasks that use the whole sentence (potentially masked)
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to make decisions, such as sequence classification, token classification or question answering. For tasks such as text
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generation you should look at model like GPT2.
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### How to use
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Here is how to use this model to get the features of a given text in PyTorch:
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```python
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encoded_input = tokenizer(text, return_tensors='pt')
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output = model(**encoded_input)
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```
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### Limitations and bias
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Even if the training data used for this model could be characterized as fairly neutral, this model can have biased
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predictions. This bias will also affect all fine-tuned versions of this model. For an understanding of bias of this particular
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unpublished books and [English Wikipedia](https://en.wikipedia.org/wiki/English_Wikipedia) (excluding lists, tables and
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headers).
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## Training procedure
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### Preprocessing
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The texts are lowercased and tokenized using WordPiece and a vocabulary size of 30,000. The inputs of the model are
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then of the form:
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- In 80% of the cases, the masked tokens are replaced by `[MASK]`.
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- In 10% of the cases, the masked tokens are replaced by a random token (different) from the one they replace.
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- In the 10% remaining cases, the masked tokens are left as is.
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### Pretraining
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The model was trained on 16 Cloud TPU v2 chips for two million steps with a batch size
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of 256. The sequence length was set to 512 throughout. The optimizer
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used is Adam with a learning rate of 1e-4, \\(\beta_{1} = 0.9\\) and \\(\beta_{2} = 0.999\\), a weight decay of 0.01,
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learning rate warmup for 10,000 steps and linear decay of the learning rate after.
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### BibTeX entry and citation info
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```bibtex
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@article{DBLP:journals/corr/abs-2106-16163,
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- wikipedia
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---
|
11 |
# MultiBERTs Seed 23 (uncased)
|
12 |
+
Seed 23 MultiBERTs (pretrained BERT) model on English language using a masked language modeling (MLM) objective. It was introduced in
|
13 |
[this paper](https://arxiv.org/pdf/2106.16163.pdf) and first released in
|
14 |
[this repository](https://github.com/google-research/language/tree/master/language/multiberts). This model is uncased: it does not make a difference
|
15 |
between english and English.
|
16 |
|
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Disclaimer: The team releasing MultiBERTs did not write a model card for this model so this model card has been written by [gchhablani](https://hf.co/gchhablani).
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+
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## Model description
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MultiBERTs models are transformers model pretrained on a large corpus of English data in a self-supervised fashion. This means it
|
21 |
was pretrained on the raw texts only, with no humans labelling them in any way (which is why it can use lots of
|
|
|
31 |
predict if the two sentences were following each other or not.
|
32 |
This way, the model learns an inner representation of the English language that can then be used to extract features
|
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useful for downstream tasks: if you have a dataset of labeled sentences for instance, you can train a standard
|
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+
classifier using the features produced by the MultiBERTs model as inputs.
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+
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## Intended uses & limitations
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You can use the raw model for either masked language modeling or next sentence prediction, but it's mostly intended to
|
38 |
+
be fine-tuned on a downstream task. See the [model hub](https://huggingface.co/models?filter=multiberts) to look for
|
39 |
fine-tuned versions on a task that interests you.
|
40 |
Note that this model is primarily aimed at being fine-tuned on tasks that use the whole sentence (potentially masked)
|
41 |
to make decisions, such as sequence classification, token classification or question answering. For tasks such as text
|
42 |
generation you should look at model like GPT2.
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+
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### How to use
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Here is how to use this model to get the features of a given text in PyTorch:
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```python
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encoded_input = tokenizer(text, return_tensors='pt')
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output = model(**encoded_input)
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```
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+
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### Limitations and bias
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Even if the training data used for this model could be characterized as fairly neutral, this model can have biased
|
57 |
predictions. This bias will also affect all fine-tuned versions of this model. For an understanding of bias of this particular
|
|
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unpublished books and [English Wikipedia](https://en.wikipedia.org/wiki/English_Wikipedia) (excluding lists, tables and
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headers).
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## Training procedure
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+
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### Preprocessing
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The texts are lowercased and tokenized using WordPiece and a vocabulary size of 30,000. The inputs of the model are
|
68 |
then of the form:
|
|
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- In 80% of the cases, the masked tokens are replaced by `[MASK]`.
|
79 |
- In 10% of the cases, the masked tokens are replaced by a random token (different) from the one they replace.
|
80 |
- In the 10% remaining cases, the masked tokens are left as is.
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81 |
+
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### Pretraining
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The model was trained on 16 Cloud TPU v2 chips for two million steps with a batch size
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of 256. The sequence length was set to 512 throughout. The optimizer
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used is Adam with a learning rate of 1e-4, \\(\beta_{1} = 0.9\\) and \\(\beta_{2} = 0.999\\), a weight decay of 0.01,
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learning rate warmup for 10,000 steps and linear decay of the learning rate after.
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+
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### BibTeX entry and citation info
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```bibtex
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@article{DBLP:journals/corr/abs-2106-16163,
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