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summary of neural-networks-deep-learning

sticky | Posted on 2018-02-08 | In English
Words count in article 473 | Reading time ≈ 2
NoteThis is my personal summary after studying the course neural-networks-deep-learning, which belongs to Deep Learning Specialization. and the copyright belongs to deeplearning.ai. My personal notes$ ...
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Calculus and Differential in Machine Learning

sticky | Posted on 2018-01-28 | In 中文
Words count in article 584 | Reading time ≈ 2
本文会一直随时间持续更新 梯度一个点的切线的斜率与法线的斜率相乘等于-1证明:斜率 $k_1=tan\theta$,$\theta$ 是倾斜角,对应的法线的倾斜角为 $\theta+90$,那么 $$k_1 * k_2=tan\theta * tan(\theta+90)=tan\theta * (-cot\theta)=-1$$ 直线的点法式方程函数 $y=f(x)$ 在点 $x_0$ 处的导 ...
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summary of Machine Learning

sticky | Posted on 2018-01-20 | In English
Words count in article 909 | Reading time ≈ 5
The content table of Machine LearningThis course is a coursera version teached by Andrew NG, AP of Stanford University, which corresponds to the full-time campus version CS229 at Stanford university, ...
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summary of Linear Algebra

sticky | Posted on 2017-12-28 | In 中文
Words count in article 398 | Reading time ≈ 1
本文是本人学习线性代数的笔记汇总,个人学习顺序是网易MIT线性代数公开课结合其教材,然后是用清华大学线性代数公开课做复习,清华的课证明更多深度更深一些(逻辑更严密一些)而mit公开课是用及其3阶矩阵讲明问题的本质(讲究的是直觉),这两门公开课使用同一个教材,教材、ppt、笔记总结是本文主要内容。 麻省理工: 线性代数 公开课官网目录,网易公开课目录 使用教授亲写的教材: Introduction ...
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PCA in action

sticky | Posted on 2017-02-11 | In English
Words count in article 997 | Reading time ≈ 6
This is my personal learning note of the book, Python Data Science Cookook. Tipbefore learning about the following example , we need to have the notion of the principle of PCA the principle of PCA i ...
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Perception Learning Algorithm

sticky | Posted on 2015-04-24 | In 中文
Words count in article 1.4k | Reading time ≈ 5
PLA(Perception Learning Algorithm) 适用于二维及高维的线性可划分问题。问题的答案只有同意或者不同意。 例子银行可以根据顾客的个人信息来判断是否给顾客发放信用卡。将顾客抽象为一个向量$X$,包括姓名、年龄、年收入、负债数等。同时设定各个属性所占的权重向量为$W$,对于正相关的属性设置相对较高的权重,如年收入,对于负相关的属性设置较低的权重,如负债数。$y$表示是否想 ...
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SnailDove

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