Ulysses’ trip

Latest post

Mar 2, 2026, 00:07:43

I am using #Thunar as my #filemanager and #Ghostty as my #terminal. One thing that bugs me is that clicking "open terminal here" in Thunar opens Ghostty in the default working directory instead. I just fixed this today by changing the command to `TERM_PROGRAM=dumb exo-open --working-directory %f --launch TerminalEmulator`, i.e., adding an environment variable `TERM_PROGRAM`. The value does not matter, but it has to have some value for exo-open to work. No idea why.

Articles

Nov 6, 2022
Thoughts on a middle school thermal physics problem
To heat an object with hot water, if we divide the water into more parts and use each part to heat the object one after another, the final temperature will be higher. If the number of parts tends to infinity, then the final temperature will tend to the limit $T+\mathrm e^{-\frac C{C_0}}\left(T_0-T\right)$ , where $T$ is the initial temperature of the object, $T_0$ is the temperature of the hot water, $C$ is the heat capacity of the object, and $C_0$ is the heat capacity of the hot water.
/physics #calculus #number sequence #from zhihu
May 23, 2022
I created a community rhythm game called Dododo
I have created a community rhythm game called Dododo. It is a rhythm game with musical rhythm notations.
/update #update #rhythm game #web
Aug 21, 2020
New website for MOIS Project (club)
I have built a website for our club called MOIS Project. It is a club related to music and band.
/update #update
Jul 28, 2020
My activities in 2020 JDFZ Summer Session
JDFZ is hosting a summer session, where lectures covering a wide range of topics are held. Come and see what are my activities during this event.
/update #update
Jul 5, 2020
New website for Little Turings (club)
I, the president and one of the founders of Little Turings, created a website to distribute information about it. The website is bilingual (Chinese and English).
/update #update
Jun 13, 2020
Drawing a heart using Joukowsky transformation
Joukowsky transformation of a circle centered at $\left(1,1\right)$ of radius $1$ is a curve resembling a heart.
/math #complex
May 31, 2020
Generalization of Euler–Lagrange equation
We may generalize Euler–Lagrange equation to higher dimensional optimization problems: find a function defined inside a region to extremize a functional defined as an integral over that region, with the constraint that the value of the function is fixed on the boundary of the region.
/math #calculus
May 14, 2020
View of the world (physically rather than philosophically)
The view of the world… Physically! In this article, I tried to use mathematical language to describe models of the physical world. A view of the world should include: a space (actually spacetime) with some mathematical structure on it (whose points are events in the world), a symmetry principle describing the symmetry of the world, and a motion law to describe the physics and dynamics of the world. This article proposed models for Galilean, Einsteinian, and even Aristotelian worlds. Can you come up with even other worlds?
/physics #imagination #long paper
May 14, 2020
Simulating a mechanical system using rpg_core.js
Continuing my last work of simulating a mechanical system using RGSS3, I made a new version using rpg_core.js, the game scripting system shipped with RPG Maker MV. This version is live on web!
/physics #javascript #rgss #hamiltonian #calculus #ode #web #fourier transform
Apr 28, 2020
Simulating a mechanical system using RGSS3
Hamiltonian mechanics gives us a good way to simulate mechanical systems as long as we can get its Hamiltonian and its initial conditions. I implemented this simulation in RGSS3, the game scripting system shipped with RPG Maker VX Ace.
/physics #ruby #rgss #hamiltonian #calculus #ode