Class information for:
Level 1: INFORMATION RETRIEVAL//LEARNING TO RANK//QUERY EXPANSION

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
12 4 COMPUTER SCIENCE, THEORY & METHODS//COMPUTER SCIENCE, INFORMATION SYSTEMS//COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE 1181119
31 3       COMPUTER SCIENCE, SOFTWARE ENGINEERING//COMPUTER SCIENCE, INFORMATION SYSTEMS//COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE 113161
355 2             RECOMMENDER SYSTEMS//COLLABORATIVE FILTERING//INFORMATION PROCESSING & MANAGEMENT 17972
12029 1                   INFORMATION RETRIEVAL//LEARNING TO RANK//QUERY EXPANSION 965

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 INFORMATION RETRIEVAL journal 367036 6% 18% 61
2 LEARNING TO RANK authKW 339249 4% 26% 40
3 QUERY EXPANSION authKW 289428 4% 21% 42
4 INFORMAT RETRIEVAL KNOWLEDGE MANAGEMENT address 220440 1% 75% 9
5 QUERY CLASSIFICATION authKW 217716 1% 67% 10
6 PSEUDO RELEVANCE FEEDBACK authKW 214354 2% 41% 16
7 QUERY SUGGESTION authKW 212267 1% 50% 13
8 QUERY RECOMMENDATION authKW 192100 1% 59% 10
9 EXPERT SEARCH authKW 188946 1% 64% 9
10 WEB SEARCH authKW 188709 4% 17% 34

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Computer Science, Information Systems 70548 70% 0% 678
2 Information Science & Library Science 21811 24% 0% 228
3 Computer Science, Artificial Intelligence 6433 22% 0% 210
4 Computer Science, Theory & Methods 3209 16% 0% 157
5 Computer Science, Software Engineering 1958 11% 0% 104
6 Computer Science, Hardware & Architecture 319 4% 0% 34
7 Computer Science, Interdisciplinary Applications 101 3% 0% 33
8 Computer Science, Cybernetics 98 1% 0% 10
9 Operations Research & Management Science 93 3% 0% 26
10 Engineering, Electrical & Electronic 59 7% 0% 71

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 INFORMAT RETRIEVAL KNOWLEDGE MANAGEMENT 220440 1% 75% 9
2 INTELLIGENT INFORMAT RETRIEVAL 90703 1% 28% 10
3 ISLA 79990 1% 18% 14
4 HULTECH GREYC 43543 0% 67% 2
5 INFORMAT RETRIEVAL 39995 1% 18% 7
6 AI TECHNOL 32658 0% 100% 1
7 BIKE 32658 0% 100% 1
8 BIODEF KNOWLEDGE 32658 0% 100% 1
9 BMIR 32658 0% 100% 1
10 CIENCIAS COMP IA ETSI INFORMAT TELECOMUN 32658 0% 100% 1

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 INFORMATION RETRIEVAL 367036 6% 18% 61
2 INFORMATION PROCESSING & MANAGEMENT 181189 11% 5% 108
3 FOUNDATIONS AND TRENDS IN INFORMATION RETRIEVAL 163282 1% 50% 10
4 INFORMATION RETRIEVAL JOURNAL 146942 2% 30% 15
5 ACM TRANSACTIONS ON INFORMATION SYSTEMS 127416 5% 8% 46
6 JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY 99346 8% 4% 78
7 JOURNAL OF THE ASSOCIATION FOR INFORMATION SCIENCE AND TECHNOLOGY 22868 2% 3% 23
8 ACM TRANSACTIONS ON THE WEB 22372 1% 6% 12
9 PROCEEDINGS OF THE ASIST ANNUAL MEETING 13833 1% 5% 9
10 JOURNAL OF WEB ENGINEERING 9442 1% 4% 8

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 LEARNING TO RANK 339249 4% 26% 40 Search LEARNING+TO+RANK Search LEARNING+TO+RANK
2 QUERY EXPANSION 289428 4% 21% 42 Search QUERY+EXPANSION Search QUERY+EXPANSION
3 INFORMATION RETRIEVAL 247901 15% 5% 143 Search INFORMATION+RETRIEVAL Search INFORMATION+RETRIEVAL
4 QUERY CLASSIFICATION 217716 1% 67% 10 Search QUERY+CLASSIFICATION Search QUERY+CLASSIFICATION
5 PSEUDO RELEVANCE FEEDBACK 214354 2% 41% 16 Search PSEUDO+RELEVANCE+FEEDBACK Search PSEUDO+RELEVANCE+FEEDBACK
6 QUERY SUGGESTION 212267 1% 50% 13 Search QUERY+SUGGESTION Search QUERY+SUGGESTION
7 QUERY RECOMMENDATION 192100 1% 59% 10 Search QUERY+RECOMMENDATION Search QUERY+RECOMMENDATION
8 EXPERT SEARCH 188946 1% 64% 9 Search EXPERT+SEARCH Search EXPERT+SEARCH
9 WEB SEARCH 188709 4% 17% 34 Search WEB+SEARCH Search WEB+SEARCH
10 SEARCH ENGINES 173640 7% 8% 63 Search SEARCH+ENGINES Search SEARCH+ENGINES

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 1


rank cluster_id2 link
1 9454 INFORMATION PROCESSING & MANAGEMENT//JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE//INFORMATION RETRIEVAL
2 12754 CROSS LANGUAGE INFORMATION RETRIEVAL//STEMMING//INTER INFORMAT
3 831 INFORMATION RESEARCH-AN INTERNATIONAL ELECTRONIC JOURNAL//INFORMATION SCIENCE & LIBRARY SCIENCE//PROCEEDINGS OF THE ASIS ANNUAL MEETING
4 30315 XML RETRIEVAL//STRUCTURED DOCUMENT RETRIEVAL//STRUCTURED INFORMATION RETRIEVAL
5 16078 PAGERANK//GOOGLE MATRIX//FOCUSED CRAWLER
6 34343 KEYPHRASE EXTRACTION//DEWEY DECIMAL CLASSIFICATION DDC//GRAPH BASED KEYWORD EXTRACTION
7 17823 DISTRIBUTED INFORMATION RETRIEVAL//SIGNATURE FILE//SUPERIMPOSED CODING
8 22473 COMMUNITY QUESTION ANSWERING//QUESTION ANSWERING//QUESTION CLASSIFICATION
9 30674 BERNARD MADOFF//CONFIDENCE CON GAMES//INTERNET SEARCHING AND BROWSING
10 8659 SEMANTIC SIMILARITY//WORD SENSE DISAMBIGUATION//WORDNET

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