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Wu Shixiong's Large Model Academy
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Wu Shixiong's Large Model Academy

We continuously share large‑model know‑how, helping you master core skills—LLM, RAG, fine‑tuning, deployment—from zero to job offer, tailored for career‑switchers, autumn recruiters, and those seeking stable large‑model positions.

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Recent Articles

Latest from Wu Shixiong's Large Model Academy

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Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 28, 2026 · Artificial Intelligence

Mastering Multi‑Agent Systems: Design, Parallel Execution, and Interview Strategies

This article dissects the shortcomings of single‑agent LLM pipelines, introduces the Supervisor‑based Multi‑Agent architecture with LangGraph, demonstrates parallel task execution, robust error handling, and result merging, and provides concrete interview guidance backed by real performance data.

AI architectureError HandlingLLM
0 likes · 19 min read
Mastering Multi‑Agent Systems: Design, Parallel Execution, and Interview Strategies
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 27, 2026 · Artificial Intelligence

Securing RAG Systems: A Three‑Layer Permission Framework for Banking AI

This article explains why vector databases lack row‑level security, presents a three‑layer permission architecture—including JWT authentication, Milvus metadata or partition filtering, and post‑retrieval validation—covers document security levels, PostgreSQL RLS, audit logging, caching strategies, and offers interview‑ready talking points.

JWTMilvusPostgreSQL RLS
0 likes · 18 min read
Securing RAG Systems: A Three‑Layer Permission Framework for Banking AI
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 26, 2026 · Artificial Intelligence

Why Hybrid Retrieval Beats Pure Vector Search: BM25, RRF, and Real‑World Gains

This article explains why combining BM25 with dense vector search using Reciprocal Rank Fusion (RRF) improves recall for both exact‑term and semantic queries in a financial‑insurance document corpus, details the underlying algorithms, parameter choices such as k=60, provides Python implementations, and shows measurable performance gains in production.

BM25FAISSInterview Preparation
0 likes · 28 min read
Why Hybrid Retrieval Beats Pure Vector Search: BM25, RRF, and Real‑World Gains
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 22, 2026 · Artificial Intelligence

How to Overcome MinerU’s Top 9 Limitations for Reliable Document Parsing

This article examines MinerU’s strengths and nine critical shortcomings—such as reading order errors, split tables, merged cells, OCR misrecognition, formula handling, heading hierarchy loss, output inconsistency, hardware limits, and licensing issues—and provides concrete improvement strategies and interview‑ready talking points for engineers.

Document ParsingInterview TipsMinerU
0 likes · 12 min read
How to Overcome MinerU’s Top 9 Limitations for Reliable Document Parsing
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 21, 2026 · Artificial Intelligence

Step‑by‑Step Guide to Implementing a Hybrid Retrieval Function with RRF Fusion

This article breaks down the end‑to‑end retrieval function used in a RAG system, detailing each of the five stages—from request construction, hybrid vector + BM25 search, RRF fusion, cross‑encoder reranking, to threshold filtering—and provides concrete Python code, parameter choices, and performance insights.

Cross-EncoderElasticsearchMilvus
0 likes · 13 min read
Step‑by‑Step Guide to Implementing a Hybrid Retrieval Function with RRF Fusion
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 20, 2026 · Artificial Intelligence

Mastering MinerU: Overcoming Its Top 9 Limitations for Reliable Document Parsing

This article examines MinerU's strengths and nine critical shortcomings—such as layout order errors, cross‑page table splits, merged‑cell failures, OCR misrecognition, and licensing issues—and provides concrete improvement strategies, interview‑ready resume bullets, and practical response frameworks for engineers.

LLMMinerUOCR
0 likes · 13 min read
Mastering MinerU: Overcoming Its Top 9 Limitations for Reliable Document Parsing
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 19, 2026 · Artificial Intelligence

Making LLM Answers Trustworthy: Citation Attribution and Hallucination Detection

This article explains why simple prompt‑based citation is insufficient for Retrieval‑Augmented Generation, introduces a sentence‑level attribution pipeline, combines semantic similarity with NLI verification, and presents practical hallucination detection and structured JSON output to ensure answer reliability.

LLM reliabilityNLIRAG
0 likes · 10 min read
Making LLM Answers Trustworthy: Citation Attribution and Hallucination Detection
Wu Shixiong's Large Model Academy
Wu Shixiong's Large Model Academy
Mar 17, 2026 · Artificial Intelligence

Mastering Chunk Splitting for RAG: From Fixed Length to Semantic Segmentation

Chunk splitting, a critical yet often overlooked step in RAG pipelines, dramatically impacts retrieval recall and LLM output quality; this guide walks through three evolution stages—from naive fixed‑length splits to sentence‑aware overlaps and finally semantic, structure‑driven segmentation—complete with code, experiments, and practical pitfalls.

ChunkingLLMRAG
0 likes · 15 min read
Mastering Chunk Splitting for RAG: From Fixed Length to Semantic Segmentation