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Model: inkoziev/sbert_pq
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{
"word_embedding_dimension": 312,
"pooling_mode_cls_token": false,
"pooling_mode_mean_tokens": true,
"pooling_mode_max_tokens": false,
"pooling_mode_mean_sqrt_len_tokens": false
}

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---
pipeline_tag: sentence-similarity
tags:
- sentence-transformers
- feature-extraction
- sentence-similarity
- transformers
language: ru
license: unlicense
widget:
- source_sentence: "Кошка ловит мышку."
sentences: ["Кто ловит мышку?", "Где живет кошка?", "Как мышку зовут?"]
---
# SBERT_PQ
Это [sentence-transformers](https://www.SBERT.net) модель, предназначенная
для определения релевантности короткого текста (преимущественно одно предложение длиной до 10-15 слов) и вопроса.
Модель вычисляет для текста и вопроса векторы размерностью 312. Косинус угла между этими векторами
дает оценку того, содержит ли текст ответ на заданный вопрос. В [проекте диалоговой системы](https://github.com/Koziev/chatbot)
она используется для семантического поиска записей в базе фактов по заданному собеседником вопросу.
# Скорость и точность
Модель основана на [cointegrated/rubert-tiny2](https://huggingface.co/cointegrated/rubert-tiny2).
Она имеет очень небольшой размер и быстро выполняет инференс даже на CPU.
Максимальное значение метрики cossim_f1 на тестовой выборке (10% датасета) равно **0.986**.
При использовании модели sberbank-ai/ruBert-base в качестве базовой, максимум cossim_f1 составляет **0.992**.
## Использование с библиотекой (Sentence-Transformers)
Необходимо установить [sentence-transformers](https://www.SBERT.net):
```
pip install -U sentence-transformers
```
Чтобы определить релевантность в одной паре "текст-вопрос", можно использовать такой код:
```
import sentence_transformers
sentences = ["Кошка ловит мышку.", "Чем занята кошка?"]
model = sentence_transformers.SentenceTransformer('inkoziev/sbert_pq')
embeddings = model.encode(sentences)
s = sentence_transformers.util.cos_sim(a=embeddings[0], b=embeddings[1])
print('text={} question={} cossim={}'.format(sentences[0], sentences[1], s))
```
## Контакты и цитирование
```
@MISC{rugpt_chitchat,
author = {Ilya Koziev},
title = {Texts & Questions Relevancy Model},
url = {https://huggingface.co/inkoziev/sbert_pq},
year = 2022
}
```

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{
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"architectures": [
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"layer_norm_eps": 1e-12,
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"model_type": "bert",
"num_attention_heads": 12,
"num_hidden_layers": 3,
"pad_token_id": 0,
"position_embedding_type": "absolute",
"torch_dtype": "float32",
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{
"__version__": {
"sentence_transformers": "2.2.2",
"transformers": "4.21.1",
"pytorch": "1.10.0+cu111"
}
}

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[
{
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"name": "0",
"path": "",
"type": "sentence_transformers.models.Transformer"
},
{
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"name": "1",
"path": "1_Pooling",
"type": "sentence_transformers.models.Pooling"
}
]

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"tokenize_chinese_chars": true,
"tokenizer_class": "BertTokenizer",
"unk_token": "[UNK]"
}

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