Clustering Evaluation: Evaluate the clustering result by accuracy and normalized mutual information Deng Cai, Xiaofei He, and Jiawei Han, "Document Clustering Using Locality Preserving Indexing", in IEEE TKDE, 2005. Bibtex source bestMap hun

用于数据挖掘方面的。潜在语义索引最初是一种知识的自动提取和表示的方法，近年来广泛地应用到文本检索中-For data mining. Latent Semantic Indexing is a knowledge of the first automatic extraction and representation methods in recent years, widely used in text retrieval

Web search is the quintessential large-data problem. Given an information need expressed as a short query consisting of a few terms, the system s task is to retrieve relevant web objects (web pages, PDF documents, PowerPoint slides, etc.) and p