Yaonotes Blog

后验概率

你需要为阳性检测结果担心吗？

假设在人群中有一种疾病，每1000人会有一人不幸患上这种疾病。在医院中有相应的检测技术，若患者$A$有这种疾病，那么有 95% 的可能这种技术会返回阳性结果，5% 的可能返回阴性结果。对应地，若被检测的人没有这种疾病，该检测技术仍有$5\%$的可能返回阳性结果，但 95% 的情况下都是阴性结果。现在某疑似患者在医院检测出了阳性结果，那么他真实患有这种疾病的概率是多少呢？直觉上来说，这种技...

Posted by Xiaozhe Yao on September 7, 2020

Implement a Deep Learning Framework in Pure Python

I: Preliminaries.

预备知识本节将包括对卷积神经网络、梯度下降法、反向传播的初步介绍。同时我们也将会详细的推导我们本节最重要的结论：矩阵线性变换的导数。由于本文最初是英文写成，可能会有一些翻译腔，请谅解。卷积神经网络卷积神经网络是被广泛使用的一类神经网络。在一个卷积神经网络中，通常存在卷积层（Convolution Layer），池化层（Pooling Layer）和全连接层（Fully Connec...

Posted by Xiaozhe Yao on July 14, 2020

可解释性的机器学习笔记 (I)

动机，分类和范围

可解释性是人们能够理解决策原因的程度。也是指人们能够一致地预测模型结果的程度。以下原因推动了对可解释性(Interpretability) 和解释 (Explanations) 的需求 (Doshi-Velez 和 Kim (2017),Miller (2017)): 人类的好奇心和学习能力,这是指人类有着对周围环境的心理模型 (Mental Model),当有意外的事情发生时,人...

Posted by Xiaozhe Yao on July 3, 2020

Transfer Learning

Generally, transfer learning is a process where a model trained on one problem is used in some way on a second related problem. In deep learning, it refers to the technique whereby a deep learning ...

Posted by Xiaozhe Yao on June 12, 2020

Setup Latex in Docker with VSCode

In this article, I will introduce how I set up my environment for writing $\LaTeX$ in VSCode. Usually I do not share how to configure the environment, but I love the settings and really want to sha...

Posted by Xiaozhe Yao on June 7, 2020

Convolutional Neural Networks

Overview Convolutional neural network (CNN or ConvNet) is a class of deep neural networks, which plays an important role in image classification. Though there are several different types of CNNs, ...

Posted by Xiaozhe Yao on May 31, 2020

Ethical AI Application

In recent days, I read several posts about ethical artificial intelligence, and most importantly, a list of scary AI usage by David Dao. Since then, I was thinking what should be defined as an awfu...

Posted by Xiaozhe Yao on May 27, 2020

Analysing Sentiment Changes during the COVID-19 Pandemic

United we stand, Divided we fall. Since last December, the coronavirus has been spreaded across the globe. Besides of the physical harm to more than 5 million innocent people, there comes a ...

Posted by Xiaozhe Yao on May 22, 2020

MLFlow - Manage Machine Learning Lifecycle

Accelerating the Machine Learning Lifecycle with MLFflow

Abstract for the paper “Accelerating the Machine Learning Lifecycle with MLflow” by Matei Zaharia et al. Challenges There are various new challenges that machine learning developers met, but ...

Posted by Xiaozhe Yao on May 5, 2020

网络抬杠指南

起手式 - “声东击西” 一般来说，如果真的要杠，我们通常都不希望被人发现我们在杠。因此，我们可以采取一些起手式来减轻怀疑。例有一说一，我真的不是要杠；这样的起手式并不是固定的，也不一定出现在开头。它可以出现在句子的任意一处搭配其他言论使用。特别要注意的是，尽量不要使用固定的格式和语句，要尽可能发挥创造力。第二式 - “诉诸人身” 如果你一时找不到对方言论里的破绽，那么可以...

Posted by Xiaozhe Yao on May 4, 2020