Blog Posts
The Email That Came From a Domain That Cannot Exist
A phishing email arrived from govv.cnn — a top-level domain that isn't in the root zone. Why that's a feature, not a mistake, and what actually authenticates a sender.
Sep 16, 2026
Computer Network
Cryptography
Tech
什么是 Wi-Fi Calling
Aug 20, 2023
Computer Network
How are GPU infrastructures managed at OpenAI
Mar 12, 2023
Machine Learning
GPU
Infrastructure
Why does my multiprocessing python program hang?
Mar 2, 2023
Python
PGP and GPG Cheat Sheet
Nov 11, 2022
Cryptography
Linux
Default Arguments in Python
WTF Python?
Jul 2, 2022
Python
非必要离校
一首很美的小诗，来自上海交通大学主办的第五届《全球华语大学生短诗大赛》的参赛作品。由于涉及敏感话题，大陆媒体的相关报道已经删除。
Apr 21, 2022
Literature
Independence of Cyberspace in 2022
Mar 20, 2022
Thoughts
C++ Exceptions
Oct 4, 2021
C++
Programming
Error handling
With examples in C and C++
Oct 2, 2021
Programming
C
手动安装vscode-server
Fuck GFW
Sep 14, 2021
GWF
Linux screen cheat sheet
Let’s screen! 😆
Mar 23, 2020
Linux
Ubuntu 常用安装包管理命令
Debian 和 Ubuntu 系统中常用的安装包管理命令有
apt-get, apt-cache, apt 和 aptitude，它们之间到底是什么关系？Jan 29, 2020
Ubuntu
Linux
Python KeyboardInterrupt
Oct 10, 2019
Python
什么是交叉熵?
cross entropy explained
Feb 24, 2019
Machine Learning
图像二值化处理
Jul 6, 2018
OpenCV
Computer Vision
VC Theory
Apr 10, 2018
Machine Learning
如何评估你的机器学习模型
Feb 12, 2018
Machine Learning
Gradient Descent
What is Gradient Descent?
Feb 22, 2017
Machine Learning