Merge branch 'dev_lhn' into dev_websocket

haoneng.lhn

2023-04-27 911d450a596a711d6faea37c2abfba13d3a511fd

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7