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--- |
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license: apache-2.0 |
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language: |
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- ru |
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- en |
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library_name: transformers |
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pipeline_tag: feature-extraction |
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--- |
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# DeBERTa-base |
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<!-- Provide a quick summary of what the model is/does. --> |
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Pretrained bidirectional encoder for russian language. |
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The model was trained using standard MLM objective on large text corpora including open social data. |
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See `Training Details` section for more information. |
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⚠️ This model contains only the encoder part without any pretrained head. |
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- **Developed by:** [deepvk](https://vk.com/deepvk) |
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- **Model type:** DeBERTa |
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- **Languages:** Mostly russian and small fraction of other languages |
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- **License:** Apache 2.0 |
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## How to Get Started with the Model |
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```python |
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from transformers import AutoTokenizer, AutoModel |
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tokenizer = AutoTokenizer.from_pretrained("deepvk/deberta-v1-base") |
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model = AutoModel.from_pretrained("deepvk/deberta-v1-base") |
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text = "Привет, мир!" |
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inputs = tokenizer(text, return_tensors='pt') |
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predictions = model(**inputs) |
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``` |
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## Training Details |
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### Training Data |
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400 GB of filtered and deduplicated texts in total. |
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A mix of the following data: Wikipedia, Books, Twitter comments, Pikabu, Proza.ru, Film subtitles, News websites, and Social corpus. |
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#### Deduplication procedure |
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1. Calculate shingles with size of 5 |
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2. Calculate MinHash with 100 seeds → for every sample (text) have a hash of size 100 |
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3. Split every hash into 10 buckets → every bucket, which contains (100 / 10) = 10 numbers, get hashed into 1 hash → we have 10 hashes for every sample |
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4. For each bucket find duplicates: find samples which have the same hash → calculate pair-wise jaccard distance of similarity → if the similarity is >0.7 than it's a duplicate |
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5. Gather duplicates from all the buckets and filter |
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### Training Hyperparameters |
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| Argument | Value | |
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|--------------------|----------------------| |
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| Training regime | fp16 mixed precision | |
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| Optimizer | AdamW | |
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| Adam betas | 0.9,0.98 | |
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| Adam eps | 1e-6 | |
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| Weight decay | 1e-2 | |
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| Batch size | 2240 | |
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| Num training steps | 1kk | |
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| Num warm-up steps | 10k | |
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| LR scheduler | Linear | |
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| LR | 2e-5 | |
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| Gradient norm | 1.0 | |
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The model was trained on a machine with 8xA100 for approximately 30 days. |
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### Architecture details |
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| Argument | Value | |
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|-------------------------|----------------| |
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|Encoder layers | 12 | |
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|Encoder attention heads | 12 | |
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|Encoder embed dim | 768 | |
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|Encoder ffn embed dim | 3,072 | |
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|Activation function | GeLU | |
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|Attention dropout | 0.1 | |
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|Dropout | 0.1 | |
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|Max positions | 512 | |
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|Vocab size | 50266 | |
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|Tokenizer type | Byte-level BPE | |
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## Evaluation |
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We evaluated the model on [Russian Super Glue](https://russiansuperglue.com/) dev set. |
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The best result in each task is marked in bold. |
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All models have the same size except the distilled version of DeBERTa. |
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| Model | RCB | PARus | MuSeRC | TERRa | RUSSE | RWSD | DaNetQA | Score | |
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|------------------------------------------------------------------------|-----------|--------|---------|-------|---------|---------|---------|-----------| |
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| [vk-deberta-distill](https://huggingface.co/deepvk/deberta-v1-distill) | 0.433 | 0.56 | 0.625 | 0.59 | 0.943 | 0.569 | 0.726 | 0.635 | |
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| [vk-roberta-base](https://huggingface.co/deepvk/roberta-base) | 0.46 | 0.56 | 0.679 | 0.769 | 0.960 | 0.569 | 0.658 | 0.665 | |
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| [vk-deberta-base](https://huggingface.co/deepvk/deberta-v1-base) | 0.450 |**0.61**|**0.722**| 0.704 | 0.948 | 0.578 |**0.76** |**0.682** | |
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| [vk-bert-base](https://huggingface.co/deepvk/bert-base-uncased) | 0.467 | 0.57 | 0.587 | 0.704 | 0.953 |**0.583**| 0.737 | 0.657 | |
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| [sber-bert-base](https://huggingface.co/ai-forever/ruBert-base) | **0.491** |**0.61**| 0.663 | 0.769 |**0.962**| 0.574 | 0.678 | 0.678 | |
