写作 writing

这里收集四类东西：实验日志、阅读与学习笔记、稍微长一点的随笔，以及零碎的思绪。第一类最结构化，最后一类最随意。中间两类按需。 Four buckets, sorted by structure: experiment logs, reading notes, longer essays, and short fragments. First is the most rigid, last is the most loose.

没有什么编辑流程。写完就发，错了就改。RSS 在路上。 No editorial process. Publish on write, fix on error. RSS coming.

• 2026 · 05 · 02
  log
  Pythia-6.9B 情绪向量复现 Pythia-6.9B emotion probing — a post-mortem 原计划是「干净复现」，14 条发现里能直接 ship 的为零；这是为什么。 The plan was a clean replication. Of 14 findings, zero ship raw — here's why.
• 2026 · 04 · 28
  note
  阅读笔记 · Olsson 的 induction heads Reading note · Olsson's induction heads 为什么两层注意力就足够「学会复制」——以及这件事为何比看起来重要。 Why two attention layers are enough to "learn to copy" — and why that matters more than it looks.
• 2026 · 04 · 19
  essay
  从导航工程绕到机制可解释性 From navigation engineering to mech interp 关于「卡尔曼滤波」和「残差流」之间，那条比想象中更短的路径。 On the surprisingly short walk from a Kalman filter to a residual stream.
• 2026 · 04 · 12
  fragment
  四月思绪 · 七则 April fragments · seven 关于命名、关于平仄、关于在 22 点的图书馆突然被 attention mask 戳到。 On naming, on tonal patterns, on getting poked by an attention mask at 22:00 in the library.