Showing posts with label DSECLZG537. Show all posts
Showing posts with label DSECLZG537. Show all posts
Wednesday, April 5, 2023

Link Analysis

›
Link analysis for most IR functionality thus far based purely on text Scoring and ranking Link-based clustering – topical structure from lin...
Tuesday, April 4, 2023

Recommender Systems

›
Long tail effect :  Many popular products are found in both Retail / Online                      less popular products are found only online...
Sunday, April 2, 2023

Web Crawler

›
Web Crawler : It is a software for  downloading pages from the Web. Also known as Web Spider, Web Robot,  or simply Bot. Web Crawler Applic...
Friday, March 31, 2023

Websearch

›
 Search engine  1. Crawler Based   2. Directory   3. Metasearch    Search Types  1. General Search / Horizontal Search : ex : google --> ...

Ranked Retrieval Evaluation - Rank Based Measures - Non- Binary relevance

›
Non- Binary relevance Documents are rarely entirely relevant or non-relevant  to a query Many sources of graded relevance judgments Relevanc...

Ranked Retrieval Evaluation - Rank Based Measures - Binary relevance

›
Binary relevance -->  we are only worried if it is relevant or not  Precision@K (P@K) -- only top documents ie compute  % relevant docume...
Wednesday, March 29, 2023

Unranked Retrieval Evaluation- Precision and Recall based on documents and F-Measure

›
Unranked Retrival Information important measures are  Precision:The ability to retrieve top-ranked documents that are mostly relevant.  Reca...

TREC Benchmark / Measuring Relevance / Evaluating IR system

›
Measures for Search Engine 1. Latency of search 2. Expressiveness of query Language  Ability to express complex information needs Speed ...
Tuesday, January 24, 2023

Midsemester - Information Retrieval -- DSECLZG537 - Jan 7th 2023

›
Information Retrieval - Regular - Mid Semester conducted on 7th Jan 2023 -------------------------------------------------------------------...
Wednesday, January 4, 2023

Tf-IDf in information Retrieval

›
The tf-idf (term frequency-inverse document frequency) is a measure of the importance of a word in a document or a collection of documents. ...

Jaccard Coefficient - Information Retrieval

›
Links :  Example ----------------------------------------------------------------------------  All the messages below are just forwarded mes...

Minimum Edit Distance - Information Retrieval

›
Useful links :  Link1                        Execution2Intention Example -------------------------------------------------------------------...

K-Gram Index (Bigram Indexes) - Information Retrieval

›
K Gram example :  Stanford ----------------------------------------------------------------------------  All the messages below are just for...
Tuesday, January 3, 2023

Permuterm index - Information Retrieval

›
Link :  Stanford Link   ----------------------------------------------------------------------------  All the messages below are just forwar...

Difference between Word/term/token and type

›
Word – A delimited string of characters as it appears in the  text. Term – A “normalized” word (case, morphology, spelling  etc); an equival...

Issues with Information Retrieval

›
Issues with Information Retrieval? Information Retrieval deals with uncertainty and vagueness in information systems. Uncertainty : availabl...

Information Retrieval vs Data Retrieval -- Tabular form

›
  ----------------------------------------------------------------------------  All the messages below are just forwarded messages if some o...
Sunday, January 1, 2023

Information Retrieval -- DSECLZG537 - Mid Semester Question Paper - June 2021

›
  Birla Institute of Technology & Science, Pilani Work-Integrated Learning Programmes Division June 2021 Mid-Semester Test (EC...