Artificial

Intelligence

Seoul AI is the largest international Artificial Intelligence community in Seoul. Group of professionals from different fields meets twice per month in the heart of Seoul to discuss about AI or implement various AI applications.

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**Organizers**

Martin Kersner

Cinyoung Hur

Adel Sohbi

**Announcement**

Call for presenters!

**Content**

Presentations from 2017

In Distilling the Knowledge in a Neural Network paper, there is described how soft targets of the final softmax layer can be modified by additional denominator called *temperature*. This blog posts aims to visualize effect of temperature magnitude on output of modified softmax layer.

Our more general solution, called “distillation”, is to

raise the temperature of the final softmax until the cumbersomemodel produces a suitably soft set of targets. We then use the same high temperature when training the small model to match these soft targets. We show later that matching the logits of the cumbersome model is actually a special case of distillation.

```
%matplotlib inline
import numpy as np
import matplotlib
import numpy as np
import matplotlib.pyplot as plt
```

```
def softmax(logits, T=1):
logits_temperature = np.exp(logits/T)
return logits_temperature/np.sum(logits_temperature, axis=1)
def softmax_temperature_test(L, T):
S = softmax(L, T)
print(S)
plt.bar(range(len(S[0])), S[0])
```

```
L = np.array([[10, 20, 30]])
```

```
softmax_temperature_test(L, T=1)
```

```
[[ 2.06106005e-09 4.53978686e-05 9.99954600e-01]]
```

```
softmax_temperature_test(L, T=10)
```

```
[[ 0.09003057 0.24472847 0.66524096]]
```

```
softmax_temperature_test(L, T=20)
```

```
[[ 0.18632372 0.30719589 0.50648039]]
```

```
softmax_temperature_test(L, T=30)
```

```
[[ 0.23023722 0.32132192 0.44844086]]
```

```
softmax_temperature_test(L, T=100)
```

```
[[ 0.30060961 0.33222499 0.3671654 ]]
```