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I first studied this material in a computer organization course several years ago. Returning to it today, I realized that I had never quite understood it. That is why I wrote this article. Let us begin with a question: how are numbers actually represented inside a computer? Bases and Place Value We are all familiar with decimal, because we are used to counting with ten digits. Computers, however, work with binary bits underneath. We therefore need a way to move freely between different representations of the same number. ...

There was already an article on this a couple of years ago: How to Draw Scientific Diagrams with Sonnet 3.7. Even then, the model’s drawing ability was pretty astonishing. As models have improved, we now have a better way to get more elegant layouts and make finer adjustments. So I wanted to write up my own experience here. This workflow is built entirely around the ChatGPT ecosystem, so have a working ChatGPT Plus subscription or above ready. ...

I’ve loved browsing Zhihu since middle school. In a year, I would read tens of millions of Chinese characters there. Zhihu often presents one long essay after another, letting us see how different people approach a social issue from different angles. But gradually, I realized I had become too dependent on its recommendation system, and the answers I was reading were becoming increasingly emotional. That made me wonder whether there was a better way to find information. ...

If I want to write a memoir, I might as well start recording my life now.

Over the past few months, I have submitted quite a few PRs to hikyuu, a high-performance C++ quantitative trading framework on GitHub. Along the way, I picked up some useful, reusable experience, so I wanted to put it all together here. All About the Repo hikyuu is a huge, high-performance quantitative backtesting framework. It contains not only C++, but Python as well. If you rely on a human alone to optimize it and contribute to it, understanding the whole framework is extremely difficult. ...

Today, I dropped my phone again. Unfortunately, the screen cracked—the outer glass, to be precise. I had already broken it once at the end of June, and now I have done it again. At first, I thought the problem was that I had not applied the screen protector properly. So this time I paid close attention and carefully put on a tempered-glass protector. But the unfortunate thing still happened. Just like that, the screen shattered again. ...

If one day someone asked you to reverse-engineer an application, an app, or a website, what would you do? Two years ago, I probably would have been completely at a loss—or, at the very least, I would have run into problem after problem. I might have thrown the whole thing into an AI chat box and asked it to help me find a direction. Honestly, that approach was incredibly inefficient, and it was easy to miss important details. ...

This page verifies the global rendering features configured for the site. Math Rendering Inline math works with \(e^{i\pi} + 1 = 0\). Block math works too: $$ \int_0^1 x^2 \, dx = \frac{1}{3} $$ Mermaid Diagram Rendering This block checks Mermaid code fences and the site’s interactive diagram wrapper. - + Fit flowchart TD Start[Start] --> Write[Write Markdown] Write --> Build[Run Hugo] Build --> Deploy[Push to Vercel] Raw HTML Rendering This disclosure widget is authored as raw HTML inside Markdown. ...