One common preprocessing step in machine learning is to center and standardize your dataset, meaning that you substract the mean of the whole numpy array from each example, and then divide each example by the standard deviation of the whole numpy array. But for picture datasets, it is simpler ...
《Neural Networks and Deep Learning》课程笔记 # Lesson 1 Neural Network and Deep Learning 这篇文章其实是 Coursera 上吴恩达老师的深度学习专业课程的第一门课程的课程笔记。 参考了其他人的笔记继续归纳的。 逻辑回归 (Logistic Regression)# 逻辑回归的定义# 神经网络的训练过程可以分为前向传播(forward propaga...
Coursera课程《Neural Networks and Deep Learning》 deeplearning.ai Week1 Introduction to deep learning What is a Neural Network? 让我们从一个房价预测的例子开始讲起。 假设你有一个数据集,它包含了六栋房子的信息。所以,你知道房屋的面积是多少平方英尺或者平方米,并且知道房屋价格。这时,你想要拟合一个根据...
更新参数:根据求出来的导数的值来更新模型参数:parameters = update_parameters(parameters, grads, learning_rate) defL_layer_model(X,Y,layers_dims,learning_rate=0.0075,num_iterations=3000,print_cost=False):#lr was 0.009"""Implements a L-layer neural network: [LINEAR->RELU]*(L-1)->LINEAR->SIGM...
图2 截屏来自:https://www.coursera.org/learn/neural-networks-deep-learning/lecture/GyW9e/neural-network-representation 3.3 采用上周在logisitc regression使用forward propagation方法,对 2 layer NN 进行计算,注意各个量的dim,见图3: 图3 图3 截屏来自:https://www.coursera.org/learn/neural-networks-deep...
【Neural Networks and Deep Learning2019吴恩达最新Coursera课程学习】——第一周—Introduction to deep learning,程序员大本营,技术文章内容聚合第一站。
第一课:神经网络和深度学习(NeuralNetworksandDeepLearning)第一周:测验Introduction toDeepLearning,10个问题本周课程笔记见1.深度学习引言(Introduction toDeepLearning) Coursera-吴恩达-深度学习-神经网络和深度学习-week2-测验 本文章内容: Coursera吴恩达深度学习课程,第一课神经网络和深度学习NeuralNetworksandDeepLearni...
2.Introduction to Deep Learning If you are a complete beginner in deep learning and looking for a Coursera program then this course is for you. The goal of this online course is toprovidelearnerswith abasic understanding of modern neural networks and their applications in computer vision and nat...
deeplearning.ai 是机器学习领域大牛Andrew Ng在Coursera上公布的新的深度学习的课程,相比之前机器学习的课程,本课程更偏重于深度学习的领域。 本文是课程一《Neural Networks and Deep Learning》的第三周笔记,上周我们给大家介绍了Logistic Regression,从本周开始,我们将正式开始学习神经网络,我们先从只有一个隐藏层的...
Neural Networks and Deep Learning This is the first course of the deep learning specialization at Coursera which is moderated by moderated by DeepLearning.ai. The course is taught by Andrew Ng. Introduction to deep learning Be able to explain the major trends driving the rise of deep learning,...