两个著名的 Switch 模拟器，分别是 Yuzu 和 Ryujinx。但由于任天堂的压力，Yuzu 和 Ryujinx 都停止了更新。

现在的 Switch 模拟器主要是这两个项目的分支，我这次安装的是 Yuzu 的分支 Eden 和 Ryujinx 的分支 Ryubing。

我找到了这两个模拟器的解压即用版本：

There are two famous Switch emulators: Yuzu and Ryujinx. However, under pressure from Nintendo, both Yuzu and Ryujinx have stopped updating.

The current Switch emulators are mainly forks of these two projects. This time I installed Eden (a fork of Yuzu) and Ryubing (a fork of Ryujinx).

I found portable (extract-and-run) versions of both emulators:

Operating Class（简称 OP Class）是 IEEE 802.11 标准中定义的一个 逻辑概念，它是一个监管域相关的频谱配置打包标签，它把 频段 + 信道集合 + 信道间距/带宽 + 其它行为限制 用一个数字编码起来，方便设备在不同国家和地区快速理解“哪些信道可以合法使用”。

Operating Class (abbreviated as OP Class) is a logical concept defined in the IEEE 802.11 standard. It is a regulatory-domain-related spectrum configuration packing label that encodes frequency band + channel set + channel spacing/bandwidth + other behavior restrictions into a single number, so that devices can quickly understand “which channels can be legally used” in different countries and regions.

雁门关

Yanmen Pass

本文记录如何在 Ubuntu 24.04 上编译 AOSP，并使用 Cuttlefish 模拟运行编译好的系统镜像。

This article records how to compile AOSP on Ubuntu 24.04 and run the compiled system image in a Cuttlefish virtual device.

上一次滨海路徒步还是 2021 年，在疫情封校的间隙，实验室组织了一次徒步活动。

时隔 4 年，再走滨海路。

但人数从 20 多人变成了 2 人。

The last Binhai Road hike was back in 2021, during a break from the COVID campus lockdown, when the lab organized a hiking activity.

Four years later, we walked the Binhai Road again.

But the group had shrunk from over 20 people to just 2.