人类通过模仿自然界中的生物,已经发明了很多东西,比如飞机,就是模仿鸟翼,但最终,这些东西会和原来的东西有些许差异,artificial neural networks (ANNs)就是模仿动物大脑的神经网络. ANNs是Deep Learning的基本组成部分,它有很多用处: ANNs are at the very core of Deep Learning. They are versatile, powerful, and scala‐ ble, making them ideal to…

背景:跟上一讲一样,识别手写数字,给一组数据集ex4data1.mat,,每个样例都为灰度化为20*20像素,也就是每个样例的维度为400,加载这组数据后,我们会有5000*400的矩阵X(5000个样例),5000*1的矩阵y(表示每个样例所代表的数据).现在让你拟合出一个模型,使得这个模型能很好的预测其它手写的数字. (注意:我们用10代表0(矩阵y也是这样),因为Octave的矩阵没有0行) 一:神经网络( Neural Networks) 神经网络脚本ex4.m: %% Machine…

http://stackoverflow.com/questions/478947/what-are-some-good-resources-for-learning-about-artificial-neural-networks…

人工神经网络的产生一定程度上受生物学的启发,因为生物的学习系统是由相互连接的神经元相互连接的神经元组成的复杂网络.而人工神经网络跟这个差不多,它是一系列简单的单元相互密集连接而成的.其中每个单元有一定数量的输入(可能是其他单元的输出),并产生单一的实数值输出(可能成为其他单元的输入). 常见的人工神经网络结果如下图: (1) 网络由三部分组成,输入层.隐藏层和输出层,往往隐藏层只有1层或2层: (2) 每层由若干个单元组成,所有单元分层互连形成一个无环的前馈网络: (3) 下一层的某个单元的输入…

原文:written by Sebastian Raschka on March 14, 2015 中文版译文:伯乐在线 - atmanic 翻译,toolate 校稿 This article offers a brief glimpse of the history and basic concepts of machine learning. We will take a look at the first algorithmically described neural network…

The Impact of Imbalanced Training Data for Convolutional Neural Networks Paulina Hensman and David Masko 摘要 本论文从实验的角度调研了训练数据的不均衡性对采用CNN解决图像分类问题的性能影响.CIFAR-10数据集包含10个不同类别的60000个图像,用来构建不同类间分布的数据集.例如,一些训练集中包含一个类别的图像数目与其他类别的图像数目比例失衡.用这些训练集分别来训练一个CNN,度量其得…

CNN综述文章 的翻译 [2019 CVPR] A Survey of the Recent Architectures of Deep Convolutional Neural Networks 翻译 综述深度卷积神经网络架构:从基本组件到结构创新 目录 摘要    1.引言    2.CNN基本组件        2.1 卷积层        2.2 池化层        2.3 激活函数        2.4 批次归一化        2.5 Dropout        2.6 全连接层…

When a golf player is first learning to play golf, they usually spend most of their time developing a basic swing. Only gradually do they develop other shots, learning to chip, draw and fade the ball, building on and modifying their basic swing. In a…

On Explainability of Deep Neural Networks « Learning F# Functional Data Structures and Algorithms is Out!   On Explainability of Deep Neural Networks During a discussion yesterday with software architect extraordinaire David Lazar regarding how every…

NEURAL NETWORKS, PART 2: THE NEURON A neuron is a very basic classifier. It takes a number of input signals (a feature vector) and outputs a single value (a prediction). A neuron is also a basic building block of neural networks, and by combining tog…