• Cosine Similarity Interactive visualization of cosine similarity between unit vectors
• Attention: Keys and Queries Explore the attention mechanism with movable query and fixed key vectors
• Softmax Temperature How temperature affects probability distributions in language models
• Z-Scores for Stylometry Step-by-step walkthrough of z-score feature scaling for stylometry
• 2D Principal Component Analysis Interactive step-by-step demonstration of PCA and dimensionality reduction
• The XOR Problem Why neural networks need hidden layers: visualize linear separability and feature transformations
• Byte-Pair Encoding (BPE) Training Step-by-step walkthrough of how BPE learns subword vocabularies, in character-level and byte-level modes
• Character Encoding Explorer See how text becomes bytes (and back) under UTF-8, UTF-16, GB18030, Big5, and more
• Regex ABCs for Chinese Eleven core lessons plus four extras on regular expressions for CJK text, with examples from 《紅樓夢》, the 《明史》 and contemporary Chinese