# 專題演講: 大 AI 時代的起點
###### tags: `20200704` `openning`
## Neural Network
Neuron => Perceptron
Forward: Inference/Backward
模擬人腦的神經連結方式
x1 X w11 + x2 X w21 + x3 X w31 + b1 -> Activate function
## Deep Neural Network(Deep Learning)
有一個大神用了CNN,贏得視覺設計競賽第一名
所以就紅起來了
## Why DL is hotter than ML
In more compute, DL's accuracy is more than ML.
## Reasons Behind the Boom
如果大家有學過大一微積分
>DNN: Gradient Descent and Backpropagation
>CNN: Convolution and NN-ized
計算複雜度下降VS計算力提升=>人工智慧的黃金交叉
Big Data: ImageNet and ILSVRC
Software Tools/Communities: github and kaggle
## Growing Use of Deep Learning at Google
越來越多服務使用ai技術
### 時間到