Machine Learning:Neural Network---Representation
来源:互联网 发布:sql in和not in的用法 编辑:程序博客网 时间:2024/05/22 05:27
Machine Learning:Neural Network---Representation
1,Non-Linear Classification
如果还采取简单的线性分类手段,那么会面临着过拟合以及效率低下的问题(如图所示),然而neural network则可以很好的解决非线性分类问题。
2,Model representation
第一层称为input layer,最后一层称为output layer,中间其余各层称为hidden layer。
注意一下权重参数theta的维数问题。
3,Forward propagation
4,神经网络Example
神经网络建模的难点在于神经结构的选择以及权重参数theta的选择,一个好的神经网络是需要很精细的设计的。
5,Multi-class classification
当将神经网络运用于Multi-class classification问题时,其输出h(theta)不再是一个数值而是一个向量,并且其值为1的元素对应着合适的分类。
----------------------------------------------------------------------------------------------------------------
本内容摘自斯坦福大学Andrew Ng老师《机器学习》课件
1 0
- Machine Learning:Neural Network---Representation
- Machine Learning---Neural Network
- [Machine Learning] Neural Network
- Machine Learning - Neural Networks Representation Part I
- Machine Learning - Neural Networks Representation Part II
- Machine learning Convolusional Neural Network
- Machine Learning week 4 quiz: Neural Networks: Representation
- Coursera Machine Learning 第四周 quiz Neural Networks: Representation
- Machine Learning week 5 programming exercise Neural Network Learning
- Machine Learning by Andrew Ng --- neural network learning
- Machine Learning week 5 programming exercise Neural Network Learning
- Machine Learning week 5 programming exercise Neural Network Learning
- Stanford Machine Learning 公开课笔记(3) Neural Network
- review CalTech machine learning, video 10 note(Neural Network)
- Machine Learning week 4 One vs All and Neural network
- Andrew NG 《machine learning》week 4,class2 —Neural Network
- Machine Learning - VIII. Neural Networks Representation神经网络的表示 (Week 4)
- coursera Machine Learning 第四周 测验quiz答案解析 Neural Networks: Representation
- 作为一个新人,怎样学习嵌入式Linux?
- 黑马程序员_java内省注解泛型
- 单链表数据结构简单实现
- Java 字符串总结
- 2014.11.17贪吃蛇------老师的修改而来
- Machine Learning:Neural Network---Representation
- 黑马程序员_java GUI编程
- “The specified child already has a parent”异常分析(由于addView方法产生)
- jdk 的配置
- 得到一个类的class对象
- 黑马程序员_java类加载器
- 【知其所以然】语义"陷阱"---数组和指针
- uva--10057+数学问题
- 黑马程序员_java动态代理