mean为张量，std为张量 torch.normal(0,1,size=(1,5))
tensor([[ 0.5548, 0.1402, 0.5849, 1.2391, -0.2564]])
torch.normal(0,std=torch.arange(1, 0, -0.1))
tensor([-0.6172, -0.1014, 0.0054, -0.0847, 0.2791, -0.0295, -0.1140, -0.3000,
-0.2172, 0.0075])
torch.normal(mean=torch.arange(1., 11.),std = 10)
tensor([ 0.0548, 33.3666, 6.6326, -3.3032, 16.0448, 18.3752, -12.6373,
-0.1594, 16.0896, 12.4073])
torch.normal(mean=torch.arange(1., 11.), std=torch.arange(1, 0, -0.1))
tensor([-0.1131, 2.1779, 2.9984, 3.9909, 4.2449, 6.1312, 6.7345, 7.6574,
8.8338, 10.1323]) 
