http://blog.csdn.net/pipisorry/article/details/4397356 机器学习Machine Learning - Andrew NG courses学习笔记 Neural Networks Representation神经网络表示 Non-linear Hypotheses非线性假设 Neurons and the Brain神经元和大脑 Model Representation模型表示 Examples and Intuitions示例和直觉知识 Mu
3. Model Representation I 1 神经网络是在模仿大脑中的神经元或者神经网络时发明的.因此,要解释如何表示模型假设,我们不妨先来看单个神经元在大脑中是什么样的. 我们的大脑中充满了如上图所示的这样的神经元,神经元是大脑中的细胞.其中有两点值得我们注意,一是神经元有像这样的细胞主体(Nucleus),二是神经元有一定数量的输入神经和输出神经.这些输入神经叫做树突(Dendrite),可以把它们想象成输入电线,它们接收来自其他神经元的信息.神经元的输出神经叫做轴突(Axon),
一.Non-linear Hypotheses 线性回归和逻辑回归在特征很多时,计算量会很大. 一个简单的三层神经网络模型: \[a_i^{(j)} = \text{"activation" of unit $i$ in layer $j$}\]\[\Theta^{(j)} = \text{matrix of weights controlling function mapping from layer $j$ to layer $j+1$}\] 其中:\[a_1^{(2)} = g(
Adit Deshpande CS Undergrad at UCLA ('19) Blog About A Beginner's Guide To Understanding Convolutional Neural Networks Part 2 Introduction Link to Part 1 In this post, we’ll go into a lot more of the specifics of ConvNets. Disclaimer: Now, I do reali
Adit Deshpande CS Undergrad at UCLA ('19) Blog About A Beginner's Guide To Understanding Convolutional Neural Networks Introduction Convolutional neural networks. Sounds like a weird combination of biology and math with a little CS sprinkled in, but