We present models for encoding sentences into embedding vectors that specifically target transfer learning to other NLP tasks. The models are efficient and result in accurate performance on diverse transfer tasks. Two variants of the encoding models allow for trade-offs between accuracy and compute resources. For both variants, we investigate and report the relationship between model complexity, resource consumption, the availability of transfer task training data, and task performance. Comparisons are made with baselines that use word level transfer learning via pretrained word embeddings as well as baselines do not use any transfer learning. We find that transfer learning using sentence embeddings tends to outperform word level transfer. With transfer learning via sentence embeddings, we observe surprisingly good performance with minimal amounts of supervised training data for a transfer task. We obtain encouraging results on Word Embedding Association Tests (WEAT) targeted at detecting model bias. Our pre-trained sentence encoding models are made freely available for download and on TF Hub.

本研究介绍了一种生成句子嵌入向量的模型，旨在实现到其他自然语言处理任务的迁移学习，并探讨了模型复杂度、资源消耗、迁移任务训练数据可用性和任务性能之间的关系。作者发现句子嵌入迁移学习通常优于单词级别的迁移，并可以在极少量监督训练数据的情况下实现出人意料的良好表现。

通用句子编码器