Mark's Space

Welcome to Mark Xu's personal site, sharing tech and life.
A Wuhan Food-Crawl Diary 1

A Wuhan Food-Crawl Diary 1

[AI-translated] While preparing in Wuhan for a second attempt at the postgraduate entrance examination, I took a day off on the weekend, followed a local creator's route around the city, visited the Hubei Provincial Museum at last, and ate plenty of good food.

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TCP Slow-Start Window Growth: A Three-Level Comparison of Textbooks, RFCs, and the Linux Kernel

TCP Slow-Start Window Growth: A Three-Level Comparison of Textbooks, RFCs, and the Linux Kernel

[AI-translated] TCP slow start is often simplified as “the congestion window doubles every RTT,” but textbooks, RFCs, and the Linux kernel describe the same mechanism from different layers. I compare the three views to clarify whether cwnd grows by ACKs, bytes, or complete segments.

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Behind localhost: A Network Journey That Never Leaves Home

Behind localhost: A Network Journey That Never Leaves Home

[AI-translated] Does localhost really pass through the network protocol stack when we use it during development? How many layers of the network are involved?

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Rejecting Reward Hacking: My Four Years at University

Rejecting Reward Hacking: My Four Years at University

[AI-translated] As I left university, I wanted to record both my memories of those four years and how my choices gradually taught me not to treat grades, rankings, and a résumé as life's only objectives.

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A Xiamen Food-Crawl Diary

A Xiamen Food-Crawl Diary

[AI-translated] With only a few days left before graduation, I was reluctant to leave Xiamen, so a classmate and I visited several interesting eateries around the city—some delightful, others disappointing.

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Why Do I Recommend College Students to Write Blogs?

Why Do I Recommend College Students to Write Blogs?

Although the idea of writing blogs already feels a little outdated, I still recommend it. It helps you clarify your thoughts, record the process of growing up, and maybe even meet like-minded people along the way.

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Looking at AI Through the Lens of Meme: Thoughts After Playing Death Stranding 2

Looking at AI Through the Lens of Meme: Thoughts After Playing Death Stranding 2

After finishing the story of Death Stranding 2, I began to understand MEME as a way for the genes of human culture to keep growing. AI can reuse these cultural genes, but new cultural genes may still have to grow out of human experience.

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From Student Innovation Project to Graduation Thesis: How My Research Thinking Evolved

From Student Innovation Project to Graduation Thesis: How My Research Thinking Evolved

From a student innovation project and a medical management system to reproducing and improving a pelvic fracture CT segmentation algorithm, this post records my graduation project and how I slowly learned to find the real problem inside failure.

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Mac Terminal Setup Notes

Mac Terminal Setup Notes

My old terminal was packed with oh-my-zsh and plugins I could barely remember, and it looked ugly enough that I did not even want to use it. So I decided to rebuild my terminal from scratch.

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When Open Source Is Only a Prompt: I Found a Ridiculous New Way to Open Source

When Open Source Is Only a Prompt: I Found a Ridiculous New Way to Open Source

I recently found a GitHub project called voice-input-src, a voice input app for Mac. The surprising part is that the repository contains only one detailed prompt for AI.

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My First Blog

My First Blog

This is the literal first blog post on my personal site, sharing my thoughts and experiences.

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Guangzhou Travel Notes

Guangzhou Travel Notes

This is my travel note in Guangzhou. (translated by ai)

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Notes from Xi'an

Notes from Xi'an

[AI-translated] I happened to find the travel diary I wrote after visiting Xi'an. It is still a simple day-by-day record, but it brings the trip back to me, so I am publishing it here before finding it by accident all over again.

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Chaoshan Travel Notes

Chaoshan Travel Notes

This is my travel note in Chaoshan. Tracked my first experience of travelling by myself. (translated by ai)

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