Meituan Technology Team

Jul 23, 2020 · Artificial Intelligence

Named Entity Recognition in O2O Search: Background, Technical Choices, and Practical Practices

Meituan’s O2O search relies on a hybrid NER system that combines high‑precision domain dictionaries with BERT‑based models scored by a CRF, built from multi‑source offline mining, accelerated via operator fusion, batching and mixed‑precision, and further enhanced by lattice‑LSTM, knowledge‑infused stages and weak‑supervision, delivering millisecond‑level latency and over‑90% recall.