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Instructor : Prof. Sumanta Guha

Information Retrieval and Data Mining (AT71.07) Comp. Sc. and Inf. Mgmt. Asian Institute of Technology. Instructor : Prof. Sumanta Guha Slide Sources : Introduction to Information Retrieval book slides from Stanford University, adapted and supplemented

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Modified from Stanford CS276 slides Chap. 2: The term vocabulary and postings lists

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CS276: Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan

CS276: Information Retrieval and Web Search Pandu Nayak and Prabhakar Raghavan Lecture 2: The term vocabulary and postings lists. Ch. 1. Recap of the previous lecture. Basic inverted indexes: Structure: Dictionary and Postings Key step in construction: Sorting Boolean query processing

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CS276: Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan

CS276: Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan Lecture 2: The term vocabulary and postings lists. Ch. 1. Recap of the previous lecture. Basic inverted indexes: Structure: Dictionary and Postings Key step in construction: Sorting

486 views • 48 slides

CS276: Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan

CS276: Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan Lecture 2: The term vocabulary and postings lists. Ch. 1. Recap of the previous lecture. Basic inverted indexes: Structure: Dictionary and Postings Key step in construction: Sorting

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Lecture 3: The term vocabulary and postings lists

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Ch 2 Term Vocabulary & Postings List Modified by Dongwon Lee from slides by

Ch 2 Term Vocabulary & Postings List Modified by Dongwon Lee from slides by Christopher Manning and Prabhakar Raghavan. Lab #7 ( DUE: Nov. 20 11:55PM ). https://online.ist.psu.edu/ist516/labs Tasks: Questions about Ch 21 and 1 Turn-In Solution document to ANGEL.

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Document ingestion

Document ingestion. Tokenizer. Friends. Romans. Countrymen. Token stream. Linguistic modules. friend. friend. roman. countryman. Modified tokens. roman. Indexer. 2. 4. countryman. 1. 2. Inverted index. 16. 13. Recall the basic indexing pipeline. Documents to be indexed.

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CS276: Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan

CS276: Information Retrieval and Web Search Christopher Manning and Prabhakar Raghavan Lecture 2: The term vocabulary and postings lists. Tokenizer. Friends. Romans. Countrymen. Token stream. Linguistic modules. friend. friend. roman. countryman. Modified tokens. roman. Indexer. 2.

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A nalogies

A nalogies. What is an analogy anyway??. They show how two words are related. They are comparisons like similes and metaphors. They can be stated using symbols (: or ::) or as a sentence. How do you say analogies??. Ms. Bettarelli is to English as Mrs. Crain is to math.

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Document Clustering

Document Clustering. Content: Document Clustering Essentials. Text Clustering Architecture Preprocessing Different Document Models Probabilistic model Vector space model (VSM) Ontology-based VSM Document Representation Ontology and Semantic Enhancement of Presentation Models

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