Haruki09

Results 1 issues of Haruki09

![image](https://user-images.githubusercontent.com/9380093/233559312-362287eb-3372-4fde-b28e-102b02c5e06c.png) i think this hidden.unsqueeze(0) only support self.param['num_layers'] = 1, should we change to previous hidden without hidden = hidden[:,-1] instead?