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An all-in-one table/cheatsheet for point groups.

简单梳理一下量子力学中的虚数单位的正负号，如何进行简单的推导和记忆，以及相对应的傅里叶变换中 e 指数上的正负号。

自行车小白自己装一辆自行车会遇到各种挑战，这里简单记录一下我在安装与使用一辆新山地车的经历与体会，主要包括山地车的结构、前轮安装的技巧、雨天骑车等方面，希望能够给打算自己安装自行车的小白一些帮助和启发。

自由开源软件与其说是一种信仰，不如说是对软件使用者更友好的一种模式。之所以选择自由开源软件，主要是一般来说，自由开源软件是合理价格的最好选择，本文将详细阐述这一观点。同时也会有一些例外，本文也会加以说明。

Getting documents older than 24 hours back in Overleaf, discarding changes you just made, without upgrading your Overleaf plan.

Connect SGP30 to your raspi and send data to InfluxDB and Grafana with Python. And then set up alerting in Grafana.

Setting up continuous query and retention policy for downsampling with existing data in InfluxDB 1.x.

We are going to connect the DHT11 sensor to a Raspberry Pi and send the sensor data to InfluxDB, and build a beautiful dashboard with Grafana!

JupyterLab can be interactive with IPython widgets. But we can also make the plot interactive and act like a GUI app!

LyX is a great software you can use to replace those plain-text-based LaTeX editors. Here I will show you why I chose LyX.

It requires some effort to make Neovim work pleasantly with Julia, especially the formatting part. But it's possible with null-ls and precompiling.

Here're problems and solutions for Traefik ACME, including failing to connect to Let's Encrypt and no NS records. And there's an example of Traefik ACME configuration.