Noah Han

#AI & Machine Learning

4 article(s)

Engineering & AI Jun 2026 · 4 min read

Preface to the “Foundations and Frontiers of Large Language Models” Series

A structured, engineer‑focused introduction to the “Foundations and Frontiers of Large Language Models” series — connecting the core principles, architectural breakthroughs, engineering paradigms, and emerging system‑level patterns behind modern LLMs. This preface outlines why the series exists, who it’s for, and how it maps the evolution from statistical NLP to Transformers, from prompting to RAG, from reasoning to agentic systems, and from classical recommenders to LLM‑native paradigms.

#AI & Machine Learning #AI Engineering #Software Engineering #Knowledge & Thinking
Engineering & AI May 2026 · 16 min read

Demystifying Conditional Random Fields (CRF) for NER: From Mathematical Elegance to Practical Implementation

A deep dive into the underlying mathematics of Conditional Random Fields (CRF), why they still matter in the age of LLMs, and a practical step-by-step guide to implementing sequence labeling using CRF++. Note: this is a combination of 2 old blog posts of me: https://blog.csdn.net/Felomeng/article/details/4288492 https://felomeng.blog.csdn.net/article/details/4367250

#AI & Machine Learning #Tech History