Universal Sentence Encoder Multilingual (tfhub_use_multi)


The Universal Sentence Encoder encodes text into high-dimensional vectors that can be used for text classification, semantic similarity, clustering, and other natural language tasks.

The model is trained and optimized for greater-than-word length text, such as sentences, phrases, or short paragraphs. It is trained on a variety of data sources and a variety of tasks with the aim of dynamically accommodating a wide variety of natural language understanding tasks. The input is the variable-length text and the output is a 512-dimensional vector. The universal-sentence-encoder model has trained with a deep averaging network (DAN) encoder.

This model supports 16 languages (Arabic, Chinese-simplified, Chinese-traditional, English, French, German, Italian, Japanese, Korean, Dutch, Polish, Portuguese, Spanish, Thai, Turkish, Russian) text encoder.

The details are described in the paper “Multilingual Universal Sentence Encoder for Semantic Retrieval”.

Note: This model only works on Linux and macOS operating systems and is not compatible with Windows due to the incompatibility of the SentencePiece library.


How to use

embeddings = UniversalSentenceEncoder.pretrained("tfhub_use_multi", "xx") \
.setInputCols("document") \
val embeddings = UniversalSentenceEncoder.pretrained("tfhub_use_multi", "xx")
import nlu

text = ["I love NLP", "Me encanta usar SparkNLP"]
embeddings_df = nlu.load('xx.use.multi').predict(text, output_level='sentence')


It gives a 512-dimensional vector of the sentences

Model Information

Model Name: tfhub_use_multi
Compatibility: Spark NLP 3.0.0+
License: Open Source
Edition: Official
Input Labels: [sentence]
Output Labels: [sentence_embeddings]
Language: xx


- We apply this model to the STS benchmark for semantic similarity. 

STSBenchmark                       | dev    | test  |
Correlation coefficient of Pearson | 0.829  | 0.809 |

- For semantic similarity retrieval, we evaluate the model on [Quora and AskUbuntu retrieval task.](https://arxiv.org/abs/1811.08008). Results are shown below:

Dataset                | Quora | AskUbuntu | Average |
Mean Average Precision  | 89.2  | 39.9      | 64.6    |

- For the translation pair retrieval, we evaluate the model on the United Nation Parallel Corpus. Results are shown below:

Language Pair  | en-es  | en-fr | en-ru | en-zh |
Precision@1    | 85.8   | 82.7  | 87.4  | 79.5  |