【本书目录】 Foreword Preface 1. Introduction to Collective Intelligence What Is Collective Intelligence? What Is Machine Learning? Limits of Machine Learning Real-Life Examples Other Uses for Learning Algorithms 2. Making Recommendations Collaborative Filtering Collecting Preferences Finding Similar Users Recommending Items Matching Products Building a del.icio.us Link Recommender Item-Based Filtering Using the MovieLens Dataset User-Based or Item-Based Filtering? Exercises ……