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AI的知识滞后、幻觉、失忆|AI学习笔记

  • 2026-03-24 20:18:36
AI的知识滞后、幻觉、失忆|AI学习笔记

符合惯性思维的理解AI的方式是模型能力去理解 AI，比如参数规模、推理能力、是否更接近人类思维等等，也就是AI够不够聪明。
但关于AI的知识库、记忆这个话题被讨论的越来越多，也是我在大量使用中，发现的一个更现实的问题。
关于知识滞后（只知道训练数据截止日期前的事情），二是产生幻觉（一本正经地胡说八道）的这两个问题，目前有很多的解决方案，我个人使用了一些个人知识库level的方案，由于我的水平只是个人使用者，积累了有限的经验。那些面对开发者的开发工具、开源平台，如LangChain、Semantic Kernel、Dify、RAGFlow我并没有接触。
* 检索增强生成（RAG, Retrieval-Augmented Generation） 是给大模型配上了一个来自使用者的实时更新的资料库或外挂硬盘。RAG 是为了让模型在回答问题前，先去指定的资料库里查一下资料，再结合查到的内容给答案，相当于限定了AI的知识库，使其不再是整个internet。
AI 很容易失忆。我们日常用的工具的 context window，也就是如GPT的聊天窗口，本质上只是临时上下文，而不是长期记忆。你和 AI 对话越久，它越需要压缩信息，甚至直接丢弃。在复杂对话中，到最后，你往往需要重新解释一遍背景。比如写代码、做分析或者长期项目，这种AI失忆就会直接影响效率甚至产生错误。这是当前 AI 的一个瓶颈，记忆管理。
在解决AI失忆的问题上，目前聊的较多的方案是Filesystems（文件系统）。把上下文写进文件，需要的时候再读回来，这种机制虽简单但可靠。现在越来越多 AI 工具开始围绕文件设计，比如Claude Code。这种解决方案本质上是把原本会消失的上下文，变成可以反复调用的长期知识。如此解决了使用者几个问题，比如不知道模型到底用了哪一段内容、不能在运行中动态的写入记忆、无法像 debug 一样查看模型的记忆状态。文件系统的另一个好处是可迁移，整理好后可以随时修改并用在不同的AI工具中。
关于Filesystems我个人的理解还非常浅，写这篇文章是出于个人学习的目的，如有理解错误还请专业人士指正。

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  140. /yingpanguazai/ssd/ssd1/www/no.67808.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000523s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000676s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000285s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000289s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000467s ]
  6. SELECT * FROM `set` [ RunTime:0.000224s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000541s ]
  8. SELECT * FROM `article` WHERE `id` = 475498 LIMIT 1 [ RunTime:0.000469s ]
  9. UPDATE `article` SET `lasttime` = 1774396598 WHERE `id` = 475498 [ RunTime:0.004334s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000250s ]
  11. SELECT * FROM `article` WHERE `id` < 475498 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000415s ]
  12. SELECT * FROM `article` WHERE `id` > 475498 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000338s ]
  13. SELECT * FROM `article` WHERE `id` < 475498 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002853s ]
  14. SELECT * FROM `article` WHERE `id` < 475498 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000640s ]
  15. SELECT * FROM `article` WHERE `id` < 475498 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.014905s ]
0.150141s