add infer decoding model param

onlybetheone

2023-02-15 ebc6b46c58ab13cbafb23c0926acc4e351f2d1d4

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beam_size: 10
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 1.0
lm_weight: 0.7