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feat: Support DPO #983

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@Shengqiang-Li Shengqiang-Li commented Feb 17, 2025

增加DPO的pipeline,经验证,可以提高指令微调模型对于情感的可控性,在某情感数据集上的acc如下(初版结果,未调参):

model angry sad happy
Before DPO 57% 41% 45.5%
After DPO 65.5% 49.5% 59.5%

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