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Uploaded by
dreampuf
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Machine learning share No.1
AI-enhanced description
本文介绍了机器学习的基本概念和学习算法。内容包括监督学习和无监督学习的不同方法,以及机器学习过程中的数据采集、准备、分析和测试步骤。还提供了一些推荐的学习资源和书籍。
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Machine learning share No.1
1.
Machine Learning 学习分享(一)
Dreampuf Apr. 2012
2.
Outline • What is
Machine Learning • How to Learning • Learning Algorithm
3.
What
4.
What P =
E*T/t T: 任务, E: 经验, P: 效率度量
5.
How to Learning
6.
How • 选择训练经验 • 选择目标函数 •
选择目标函数的表示 • 选择函数 近算法
7.
程序流程
输入数据 机器学习 新数据 估计函数 新估计
8.
最终设计
9.
Steps • 采集数据 • 准备输入数据 •
分析数据 • 训练算法 • 测试(评估)算法
10.
ML-wordle
11.
Learning Algorithm • 有监督学习 •
无监督学习
12.
Supervised learning
13.
k-Nearest Neighbors
14.
Naive Bayes
15.
Unsupervised learning
16.
k-Means
17.
Resource • Tom M.
Michell : Machine Learning(2003) • Peter Harrington : Machine Learning in action (2012) • Drew Conway & Jbn Myles Wbite Machine Learning for Hackers(2012) • Andrew Ng : http://www.ml-class.org
Editor's Notes
#2
机器学习 学习分享(一)Dreampuf(soddyque@gmail.com)\n
#3
本PPT主要包含如下内容:\n- 什么是机器学习\n- 如何进行“学习”\n- 学习算法\n
#4
什么是机器学习?\n图从上往下,从左往右依次是人脸识别,光学字符识别(OCR),商品推荐,邮件过滤。\n他们的共同之处?\n需要有一定的知识积累(参数),知识的积累是需要准备。\n不同之处?\n输入不同,输出结果也不一样。\n
#5
机器学习就是在对真实情况下问题模型的逼近。无法做到完全真实,那么我们就选择近似的一个模型。\n假设与真实情况的误差叫做风险。\n
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