Matt's Journey Notebook - How to Train Your Dragon?

Matt's Journey Notebook

Matt's Journey Notebook

Archives Tags Categories

Hao Feng

Lv3

Perplexity

[TOC] 困惑度（Perplexity, PPL）终极指南一句话版：PPL = 交叉熵（cross-entropy）的指数（exponential）。它度量语言模型（Language Model, LM）对“下一个 token”的不确定性（uncertainty）：越低越好，但不等同于任务能力。 1. 数学定义（Mathematical Definition)给定测试序列 ...

2025-09-18
Read morePerplexity
CS336 Notes

[toc] Lecture 2 笔记：从张量到训练循环1. 分词技术 (Tokenization)1.1 分词的背景与意义自然语言模型的输入是**整数序列 (tokens)**，因此必须先将原始文本转为 tokens。 Tokenizer 的职责是： **编码 (encode)**：string → tokens **解码 (decode)**：tokens → string 分词器的...
2025-09-08
Dragons

>

LLM Dragon
LLM

| CS336
Read moreCS336 Notes
PostgreSQL 如何解决膨胀问题？

PostgreSQL 如何解决膨胀问题？1. VACUUMPostgreSQL 内置命令，有两种模式： VACUUM（普通）回收表中已删除或过期的元组（dead tuples）的空间。空间一般不会释放给操作系统，而是留在表文件中供后续插入/更新复用。速度快，不会锁表（仅短暂锁元数据）。 VACUUM FULL 会新建一个干净的表文件，把有效数据重写到新文件中，释放磁盘空...
2025-08-14
Dragons

>

Database Dragon
PostgreSQL

| Controller
Read morePostgreSQL 如何解决膨胀问题？
Postgres Commands

PostgreSQL 常见命令/查询语句数据库连接在服务器或本机下载PostgreSQL客户端# 先添加 PG 官方 YUM 源sudo yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-$(rpm -E %{rhel})-x86_64/pgdg-redhat-rep...
2025-08-14
Dragons

>

Database Dragon
PostgreSQL

| Controller
Read morePostgres Commands
LightRAG - 埋坑
2025-08-10
Dragons

>

Reasearch Dragon
LLM

| Prompt Engineering

| RAG
Read moreLightRAG - 埋坑
MCP

MCP - Model–Control Protocol Cline 可以帮助练习 prompt 引言 MCP（Model–Control Protocol）：一种用于在大模型（LLM）与外部工具/服务之间进行高效、可控交互的标准化协议。目标：解耦模型与工具开发，提升复用性支持流式反馈、超时管理、安全和权限控制兼容多种传输方式（HTTP、SSE、WebSocket 等） ...
2025-06-21
Dragons

>

LLM Dragon
LLM

| Agent

| MCP
Read moreMCP
Multimodal Interpretation

As machine learning models penetrate critical areas like medicine, the criminal justice system, and financial markets, the inability of humans to understand these models seems problematic. [1] Int...
2025-06-15
Dragons

>

Reasearch Dragon
Multimodal

| Interpretation

| SHAP
Read moreMultimodal Interpretation
How-To-Grab-a-Wechat-Minigame?

WeChat Minigame Decompiling (微信小游戏反编译) I really hope this blog can do a few favor for your work! ^ _ ^ How to Get .wxapkg files?Start mini program which we want to grab.Open File Explorer (Find) a...
2024-10-10
Dragons

>

Strange Dragon
WeChat Minigame

| Decompiling
Read moreHow-To-Grab-a-Wechat-Minigame?
How to use USC CARC

How to use CARC CentOS Linux CARC OnDemand Online access point file management Command line shell access Slurm job management Access Jupyter Jupyter We can code in Jupyter interactive app Inst...
2024-03-27
Dragons

>

Strange Dragon
CARC
Read moreHow to use USC CARC
HTML 4

HTML 4 HyperText Markup Language Labels 标签/元素 content & 单标签 & 双标签嵌套/并列标签属性：属性名+属性值/ 单有属性值 <html> <head></head> <body> </body></h...
2024-03-01
Dragons

>

Front End Dragon
Front End

| HTML
Read moreHTML 4

12