Class information for:
Level 2: RECOMMENDER SYSTEMS//COLLABORATIVE FILTERING//INFORMATION PROCESSING & MANAGEMENT

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
964 1                   RECOMMENDER SYSTEMS//COLLABORATIVE FILTERING//RECOMMENDATION SYSTEM 2969
8659 1                   SEMANTIC SIMILARITY//WORD SENSE DISAMBIGUATION//WORDNET 1262
9454 1                   INFORMATION PROCESSING & MANAGEMENT//JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE//INFORMATION RETRIEVAL 1186
11438 1                   WEBOMETRICS//WEB CITATION//SEARCH ENGINES 1009
11661 1                   SENTIMENT ANALYSIS//OPINION MINING//SENTIMENT CLASSIFICATION 991
12029 1                   INFORMATION RETRIEVAL//LEARNING TO RANK//QUERY EXPANSION 965
12754 1                   CROSS LANGUAGE INFORMATION RETRIEVAL//STEMMING//INTER INFORMAT 914
13623 1                   TEXT CATEGORIZATION//TEXT CLASSIFICATION//TERM WEIGHTING 854
15553 1                   MULTI DOCUMENT SUMMARIZATION//TEXT SUMMARIZATION//AUTOMATIC SUMMARIZATION 733
16078 1                   PAGERANK//GOOGLE MATRIX//FOCUSED CRAWLER 701
16262 1                   STATISTICAL MACHINE TRANSLATION//MACHINE TRANSLATION//COMPUTATIONAL LINGUISTICS 691
17141 1                   INFORMATION EXTRACTION//WRAPPER INDUCTION//WEB DATA EXTRACTION 642
17823 1                   DISTRIBUTED INFORMATION RETRIEVAL//SIGNATURE FILE//SUPERIMPOSED CODING 608
20083 1                   SPAM FILTERING//SPAM//SPAM DETECTION 498
21063 1                   TREE EDIT DISTANCE//TREE MINING//UNORDERED TREES 458
21641 1                   WEB USAGE MINING//WEB LOG MINING//WEB ROBOT DETECTION 434
22473 1                   COMMUNITY QUESTION ANSWERING//QUESTION ANSWERING//QUESTION CLASSIFICATION 403
23342 1                   SEMANTIC LINK NETWORK//CHINA KNOWLEDGE GRID GRP//KNOWLEDGE GRID GRP 372
23343 1                   NAUCHNO-TEKHNICHESKAYA INFORMATSIYA SERIYA 2-INFORMATSIONNYE PROTSESSY I SISTEMY//ARABIC NATURAL LANGUAGE PROCESSING//SPELLING ERROR CORRECTION 372
27677 1                   CHINESE WORD SEGMENTATION//ALLERGOL IMMUNOL SERV//ASSOCIATE CONSTRAINT NETWORK 244
28461 1                   PARTIAL PARSING//TEXT CHUNKING//SHALLOW PARSING 225
29008 1                   INFORMAT SCI INTELLIGENT SYST//TRIE STRUCTURES//NATURAL LANGUAGE DICTIONARIES 213
30315 1                   XML RETRIEVAL//STRUCTURED DOCUMENT RETRIEVAL//STRUCTURED INFORMATION RETRIEVAL 186
30674 1                   BERNARD MADOFF//CONFIDENCE CON GAMES//INTERNET SEARCHING AND BROWSING 180
30939 1                   ADMISSIBLE PLANS//ARTIFICIAL INTELLIGENCE IN DESIGN//BELIEF MODELING 175
32954 1                   DOMAIN SPECIFIC ONTOLOGY//TEXT KNOWLEDGE ENGN//KNOWLEDGE ACQUISIT SHARING GRP 145
33378 1                   INTERNET CRAWLERS//RSS FEED//ABC WEIGHTED BASED FUZZY RETRIEVAL 139
34343 1                   KEYPHRASE EXTRACTION//DEWEY DECIMAL CLASSIFICATION DDC//GRAPH BASED KEYWORD EXTRACTION 126
34964 1                   NAT LANGUAGE TEXT PROC//AND INFORMATION VISUALIZATION//AUTOMATIC EXTRACTION OF COLLOCATIONS 118
37426 1                   STRING KERNELS//LEARNING WITH SEQUENTIAL DATA//SEQUENCE KERNELS 83
37786 1                   CLASS SPECIFIC FEATURES//FIXED THRESHOLD SEQUENTIAL MINIMAL OPTIMIZATION//WORD SPACING 76

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 RECOMMENDER SYSTEMS authKW 1161597 5% 76% 870
2 COLLABORATIVE FILTERING authKW 851954 4% 76% 637
3 INFORMATION PROCESSING & MANAGEMENT journal 570869 5% 39% 828
4 COMPUTER SCIENCE, INFORMATION SYSTEMS WoSSC 493664 43% 4% 7786
5 INFORMATION RETRIEVAL authKW 454879 5% 31% 837
6 SENTIMENT ANALYSIS authKW 357495 2% 62% 329
7 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE WoSSC 336793 36% 3% 6476
8 OPINION MINING authKW 245162 1% 77% 181
9 COMPUTATIONAL LINGUISTICS journal 191223 1% 49% 223
10 SEARCH ENGINES authKW 185059 2% 38% 281

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Computer Science, Information Systems 493664 43% 4% 7786
2 Computer Science, Artificial Intelligence 336793 36% 3% 6476
3 Information Science & Library Science 124051 13% 3% 2366
4 Computer Science, Theory & Methods 73917 18% 1% 3237
5 Computer Science, Software Engineering 45157 12% 1% 2145
6 Computer Science, Interdisciplinary Applications 10587 7% 1% 1285
7 Computer Science, Hardware & Architecture 9847 4% 1% 799
8 Operations Research & Management Science 8147 5% 1% 945
9 Language & Linguistics 6634 3% 1% 525
10 Computer Science, Cybernetics 5988 2% 1% 324

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 COMP SCI 91888 16% 2% 2939
2 INFORMAT SCI INTELLIGENT SYST 47316 0% 41% 66
3 INFORMAT RETRIEVAL 29585 0% 65% 26
4 COMP SCI TECHNOL 28836 3% 3% 534
5 COMP SCI ENGN 28681 5% 2% 810
6 INTER INFORMAT 26641 0% 89% 17
7 WEB SCI 25804 0% 23% 64
8 SMART MEDIA 24942 0% 51% 28
9 COMP INFORMAT TECHNOL 24005 1% 8% 178
10 INTELLIGENT INFORMAT RETRIEVAL 23533 0% 61% 22

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 INFORMATION PROCESSING & MANAGEMENT 570869 5% 39% 828
2 INFORMATION RETRIEVAL 304694 1% 73% 240
3 COMPUTATIONAL LINGUISTICS 191223 1% 49% 223
4 ACM TRANSACTIONS ON INFORMATION SYSTEMS 181266 1% 44% 237
5 JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE AND TECHNOLOGY 133473 2% 20% 391
6 NATURAL LANGUAGE ENGINEERING 118948 1% 59% 116
7 LANGUAGE RESOURCES AND EVALUATION 94852 1% 40% 135
8 LECTURE NOTES IN ARTIFICIAL INTELLIGENCE 94432 5% 6% 949
9 LECTURE NOTES IN COMPUTER SCIENCE 83965 12% 2% 2090
10 JOURNAL OF INFORMATION SCIENCE 65180 1% 15% 243

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 RECOMMENDER SYSTEMS 1161597 5% 76% 870 Search RECOMMENDER+SYSTEMS Search RECOMMENDER+SYSTEMS
2 COLLABORATIVE FILTERING 851954 4% 76% 637 Search COLLABORATIVE+FILTERING Search COLLABORATIVE+FILTERING
3 INFORMATION RETRIEVAL 454879 5% 31% 837 Search INFORMATION+RETRIEVAL Search INFORMATION+RETRIEVAL
4 SENTIMENT ANALYSIS 357495 2% 62% 329 Search SENTIMENT+ANALYSIS Search SENTIMENT+ANALYSIS
5 OPINION MINING 245162 1% 77% 181 Search OPINION+MINING Search OPINION+MINING
6 SEARCH ENGINES 185059 2% 38% 281 Search SEARCH+ENGINES Search SEARCH+ENGINES
7 TEXT CATEGORIZATION 173531 1% 61% 163 Search TEXT+CATEGORIZATION Search TEXT+CATEGORIZATION
8 TEXT CLASSIFICATION 138514 1% 47% 170 Search TEXT+CLASSIFICATION Search TEXT+CLASSIFICATION
9 NATURAL LANGUAGE PROCESSING 138040 2% 24% 333 Search NATURAL+LANGUAGE+PROCESSING Search NATURAL+LANGUAGE+PROCESSING
10 RECOMMENDATION SYSTEM 133027 1% 53% 143 Search RECOMMENDATION+SYSTEM Search RECOMMENDATION+SYSTEM

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 2


rank cluster_id2 link
1 1934 FORMAL CONCEPT ANALYSIS//CONCEPT LATTICE//SEMANTIC WEB
2 1568 INFORMATION SCIENCE & LIBRARY SCIENCE//KNOWLEDGE ORGANIZATION//JOURNAL OF DOCUMENTATION
3 3611 COMPUTERS AND THE HUMANITIES//AUTHORSHIP ATTRIBUTION//STYLOMETRY
4 3062 SPOKEN DIALOGUE SYSTEMS//SPOKEN DIALOG SYSTEMS//DIALOGUE MANAGEMENT
5 4088 CAPTCHA//CROWDSOURCING//MECHANICAL TURK
6 2457 FUZZY CLUSTERING//FUZZY C MEANS//CLUSTERING
7 3366 CASE BASED REASONING//TRIBOLOGY & LUBRICATION TECHNOLOGY//CASE BASE MAINTENANCE
8 4269 CONTEXT BASED REASONING//NCEIM//CONTEXTUAL GRAPHS
9 464 COMPUTER SCIENCE, ARTIFICIAL INTELLIGENCE//FEATURE SELECTION//SUPPORT VECTOR MACHINE
10 1215 ROUGH SETS//DATA MINING//ASSOCIATION RULES

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