SlideShare a Scribd company logo
1 of 31
+
漫談人工智慧
Jason Tsai (蔡志順) 2017.03.22
+
神經元 (neuron) 示意圖
+
神經元間的溝通之處
突觸 (synapse)
+
跳耀式傳導 (saltatory conduction)
+
動作電位 (action potential)
+
皮質柱 (Cortical Column)
相同的接受域 (receptive field)
+
皮質訊息傳送
+
視覺皮質傳導路徑
+
Hierarchical Sparse Distributed
Representations
+
長期增益作用
(long-term potentiation, LTP)
刺激輸入神經元而發生在突觸前神經元和突觸後
神經元信號傳輸產生一種持久的增強現象。
+
海柏學習法則
(Hebb’s learning rule)
突觸前神經元向突觸後神經元持續重複的刺激,
使得神經元之間的突觸強度增加。
+
第一/二代人工神經元模型
+
激活函數 (activation function)
+
感知機 (perceptron) 模型
+
多層感知機
(multi-layer perceptron)
+
卷積神經網路
(convolutional neural networks)
+
卷積神經網路
ConvNet / DeconvNet
+
卷積神經網路
Convolutional layer
 Depth (D): filter (或稱 kernel) 組數
 Stride (S): 每一次 kernel 移動的間隔
 Zero padding (P): 每一輸入邊緣填 0 的
寬度
若以 W 表示輸入寬度大小,F 表示
filter 寬度大小, 卷積運算後 feature
map 的寬度大小公式為:
D 個 [(W - F + 2P) / S] + 1
+
卷積神經網路
Convolutional layer
+
卷積神經網路
Pooling layer
+
卷積神經網路 Local receptive field,
Sparse connectivity
+
卷積神經網路
Weight sharing
 此處 w1 = w4 = w7, w2 = w5 = w8, w3 = w6 = w9
 具有 translational invariance 的特性
+
Deformable Convolutional Networks
+
Deep residual networks (ResNet)
Highway networks:
y = H(x,WH)⋅T(x,WT)+x⋅C(x,WC), C(⋅)=1−T(⋅)
Residual networks:
T(⋅)=C(⋅)=1, y = H(x,WH)+x (同上圖 F(x)+x)
+
ResNet in recurrent form
+
Loopy neural networks
+
DenseNet
+
Feedback networks
+
Sparsity: Sparse Coding (稀疏編碼) /
Sparse Representation / Dropout
+
第三代人工神經元模型
Spiking Neural Networks (脈衝神經網
路)
SDTP (spike-timing-dependent plasticity)
+
人工智慧大未來
Q & A

More Related Content

More from Jason Tsai

基於深度學習的人臉辨識技術簡介
基於深度學習的人臉辨識技術簡介基於深度學習的人臉辨識技術簡介
基於深度學習的人臉辨識技術簡介Jason Tsai
 
Neural Network Design: Chapter 17 Radial Basis Networks
Neural Network Design: Chapter 17 Radial Basis NetworksNeural Network Design: Chapter 17 Radial Basis Networks
Neural Network Design: Chapter 17 Radial Basis NetworksJason Tsai
 
Neural Network Design: Chapter 18 Grossberg Network
Neural Network Design: Chapter 18 Grossberg NetworkNeural Network Design: Chapter 18 Grossberg Network
Neural Network Design: Chapter 18 Grossberg NetworkJason Tsai
 
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Jason Tsai
 
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Jason Tsai
 
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Jason Tsai
 
Reinforcement Learning: Chapter 15 Neuroscience
Reinforcement Learning: Chapter 15 NeuroscienceReinforcement Learning: Chapter 15 Neuroscience
Reinforcement Learning: Chapter 15 NeuroscienceJason Tsai
 
Deep Learning: Chapter 11 Practical Methodology
Deep Learning: Chapter 11 Practical MethodologyDeep Learning: Chapter 11 Practical Methodology
Deep Learning: Chapter 11 Practical MethodologyJason Tsai
 
Deep Learning: Introduction & Chapter 5 Machine Learning Basics
Deep Learning: Introduction & Chapter 5 Machine Learning BasicsDeep Learning: Introduction & Chapter 5 Machine Learning Basics
Deep Learning: Introduction & Chapter 5 Machine Learning BasicsJason Tsai
 

More from Jason Tsai (9)

基於深度學習的人臉辨識技術簡介
基於深度學習的人臉辨識技術簡介基於深度學習的人臉辨識技術簡介
基於深度學習的人臉辨識技術簡介
 
Neural Network Design: Chapter 17 Radial Basis Networks
Neural Network Design: Chapter 17 Radial Basis NetworksNeural Network Design: Chapter 17 Radial Basis Networks
Neural Network Design: Chapter 17 Radial Basis Networks
 
Neural Network Design: Chapter 18 Grossberg Network
Neural Network Design: Chapter 18 Grossberg NetworkNeural Network Design: Chapter 18 Grossberg Network
Neural Network Design: Chapter 18 Grossberg Network
 
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
 
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
 
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
Introduction to Spiking Neural Networks: From a Computational Neuroscience pe...
 
Reinforcement Learning: Chapter 15 Neuroscience
Reinforcement Learning: Chapter 15 NeuroscienceReinforcement Learning: Chapter 15 Neuroscience
Reinforcement Learning: Chapter 15 Neuroscience
 
Deep Learning: Chapter 11 Practical Methodology
Deep Learning: Chapter 11 Practical MethodologyDeep Learning: Chapter 11 Practical Methodology
Deep Learning: Chapter 11 Practical Methodology
 
Deep Learning: Introduction & Chapter 5 Machine Learning Basics
Deep Learning: Introduction & Chapter 5 Machine Learning BasicsDeep Learning: Introduction & Chapter 5 Machine Learning Basics
Deep Learning: Introduction & Chapter 5 Machine Learning Basics
 

漫談人工智慧:啟發自大腦科學的深度學習網路