JosephWang
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Thoughts on data science, machine learning, and research

Nov 2, 2025
: Software, NLP, LLM, AI

How I'm Building a Context-Aware Retriever to Boost RAG Quality (Part 2: Implementation)

In Part 1, I walked through the design. Now let’s see it in action with a hands-on example using the ContractNLI dataset. I’ll assume chunking is a...
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Oct 25, 2025
: Software, NLP, LLM, AI

How I’m Building a Context-Aware Retriever to Boost RAG Quality (Part 1: Introduction)

In this post, I’ll share how I built a context-aware retriever for knowledge base question answering. It runs on top of an MCP server and can easil...
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Sep 5, 2025
: Machine Learning, Deep Learning, NLP

Hangman with DQN and Transformers

TL;DR. We train a small bidirectional Transformer + Double DQN to play Hangman, restricted to words ≤5 characters (training and inference) to keep ...
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Mar 26, 2024
: Machine Learning, Deep Learning

GMV Forecasting via xDeepFM

In this post, I aim to share how I conducted a proof of concept (PoC) to solve a real-world problem using deep learning techniques, emphasizing a c...
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Nov 16, 2023
: Machine Learning, Deep Learning, NLP, LLM

Decoding LoRA: A Comprehensive Summary on Low-Rank Adaptation

Recently, I came across an intriguing article on low-rank techniques employed in Large Language Models (LLM) specifically focusing on LoRA: Low-Ran...
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