Creates tensor in target device to avoid high CPU occupation. (#695)

anyvoice

2023-07-02 cf36ce977c0b8bd54c906e63ce31931ac060178f

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beam_size: 5
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7