Knowledge-Based Systems

Knowledge-Based Systems is an international, interdisciplinary and applications-oriented journal. This journal focuses on systems that use knowledge-based (KB) techniques to support human decision-making, learning and action; emphases the practical significance of such KB-systems; its computer development and usage; covers the implementation of such KB-systems: design process, models and methods, software tools, decision-support mechanisms, user interactions, organizational issues, knowledge acquisition and representation, and system architectures. This journal's current leading topics are but not limited to: • Big data techniques and methodologies, data-driven information systems, and knowledge acquisition • Cognitive interaction and intelligent human interfaces • Recommender systems and E-service personalization • Intelligent decision support systems, prediction systems and warning systems • Computational and artificial intelligence based systems and uncertain information processes • Swarm intelligence and evolutionary computing • Knowledge engineering, machine learning-based systems and web semantics The journal also welcomes papers describing novel applications of knowledge based systems in any human endeavor: ranging from financial technology to engineering to health science or any other domain impacted by Artificial Intelligence technologies and its associated techniques and systems.

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Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Category	Year	Quartile
Artificial Intelligence	1999	Q3
Artificial Intelligence	2000	Q3
Artificial Intelligence	2001	Q3
Artificial Intelligence	2002	Q3
Artificial Intelligence	2003	Q2
Artificial Intelligence	2004	Q3
Artificial Intelligence	2005	Q3
Artificial Intelligence	2006	Q3
Artificial Intelligence	2007	Q2
Artificial Intelligence	2008	Q2
Artificial Intelligence	2009	Q2
Artificial Intelligence	2010	Q2
Artificial Intelligence	2011	Q1
Artificial Intelligence	2012	Q1
Artificial Intelligence	2013	Q1
Artificial Intelligence	2014	Q1
Artificial Intelligence	2015	Q1
Artificial Intelligence	2016	Q1
Artificial Intelligence	2017	Q1
Artificial Intelligence	2018	Q1
Artificial Intelligence	2019	Q1
Artificial Intelligence	2020	Q1
Artificial Intelligence	2021	Q1
Information Systems and Management	1999	Q3
Information Systems and Management	2000	Q3
Information Systems and Management	2001	Q3
Information Systems and Management	2002	Q2
Information Systems and Management	2003	Q2
Information Systems and Management	2004	Q3
Information Systems and Management	2005	Q3
Information Systems and Management	2006	Q2
Information Systems and Management	2007	Q2
Information Systems and Management	2008	Q2
Information Systems and Management	2009	Q2
Information Systems and Management	2010	Q1
Information Systems and Management	2011	Q1
Information Systems and Management	2012	Q1
Information Systems and Management	2013	Q1
Information Systems and Management	2014	Q1
Information Systems and Management	2015	Q1
Information Systems and Management	2016	Q1
Information Systems and Management	2017	Q1
Information Systems and Management	2018	Q1
Information Systems and Management	2019	Q1
Information Systems and Management	2020	Q1
Information Systems and Management	2021	Q1
Management Information Systems	1999	Q2
Management Information Systems	2000	Q2
Management Information Systems	2001	Q2
Management Information Systems	2002	Q2
Management Information Systems	2003	Q2
Management Information Systems	2004	Q2
Management Information Systems	2005	Q2
Management Information Systems	2006	Q2
Management Information Systems	2007	Q2
Management Information Systems	2008	Q2
Management Information Systems	2009	Q2
Management Information Systems	2010	Q1
Management Information Systems	2011	Q1
Management Information Systems	2012	Q1
Management Information Systems	2013	Q1
Management Information Systems	2014	Q1
Management Information Systems	2015	Q1
Management Information Systems	2016	Q1
Management Information Systems	2017	Q1
Management Information Systems	2018	Q1
Management Information Systems	2019	Q1
Management Information Systems	2020	Q1
Management Information Systems	2021	Q1
Software	1999	Q3
Software	2000	Q3
Software	2001	Q3
Software	2002	Q2
Software	2003	Q2
Software	2004	Q3
Software	2005	Q3
Software	2006	Q3
Software	2007	Q2
Software	2008	Q2
Software	2009	Q2
Software	2010	Q1
Software	2011	Q1
Software	2012	Q1
Software	2013	Q1
Software	2014	Q1
Software	2015	Q1
Software	2016	Q1
Software	2017	Q1
Software	2018	Q1
Software	2019	Q1
Software	2020	Q1
Software	2021	Q1

SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Year	SJR
1999	0.260
2000	0.229
2001	0.297
2002	0.429
2003	0.514
2004	0.329
2005	0.355
2006	0.345
2007	0.496
2008	0.523
2009	0.468
2010	0.730
2011	1.117
2012	1.746
2013	1.563
2014	1.466
2015	1.744
2016	1.709
2017	1.378
2018	1.460
2019	1.754
2020	1.587
2021	2.192

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Year	Documents
1999	41
2000	51
2001	52
2002	55
2003	43
2004	30
2005	40
2006	81
2007	72
2008	105
2009	82
2010	105
2011	130
2012	253
2013	297
2014	301
2015	336
2016	406
2017	370
2018	398
2019	417
2020	717
2021	876

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per document	Year	Value
Cites / Doc. (4 years)	1999	0.374
Cites / Doc. (4 years)	2000	0.413
Cites / Doc. (4 years)	2001	0.616
Cites / Doc. (4 years)	2002	0.659
Cites / Doc. (4 years)	2003	1.156
Cites / Doc. (4 years)	2004	1.189
Cites / Doc. (4 years)	2005	1.328
Cites / Doc. (4 years)	2006	1.506
Cites / Doc. (4 years)	2007	1.402
Cites / Doc. (4 years)	2008	1.843
Cites / Doc. (4 years)	2009	2.117
Cites / Doc. (4 years)	2010	2.709
Cites / Doc. (4 years)	2011	3.690
Cites / Doc. (4 years)	2012	5.327
Cites / Doc. (4 years)	2013	4.621
Cites / Doc. (4 years)	2014	4.768
Cites / Doc. (4 years)	2015	5.144
Cites / Doc. (4 years)	2016	5.887
Cites / Doc. (4 years)	2017	6.119
Cites / Doc. (4 years)	2018	6.871
Cites / Doc. (4 years)	2019	8.231
Cites / Doc. (4 years)	2020	8.916
Cites / Doc. (4 years)	2021	9.089
Cites / Doc. (3 years)	1999	0.374
Cites / Doc. (3 years)	2000	0.468
Cites / Doc. (3 years)	2001	0.622
Cites / Doc. (3 years)	2002	0.701
Cites / Doc. (3 years)	2003	1.095
Cites / Doc. (3 years)	2004	1.060
Cites / Doc. (3 years)	2005	1.336
Cites / Doc. (3 years)	2006	1.513
Cites / Doc. (3 years)	2007	1.371
Cites / Doc. (3 years)	2008	1.793
Cites / Doc. (3 years)	2009	2.031
Cites / Doc. (3 years)	2010	2.896
Cites / Doc. (3 years)	2011	3.911
Cites / Doc. (3 years)	2012	5.751
Cites / Doc. (3 years)	2013	4.697
Cites / Doc. (3 years)	2014	4.771
Cites / Doc. (3 years)	2015	5.128
Cites / Doc. (3 years)	2016	5.911
Cites / Doc. (3 years)	2017	5.896
Cites / Doc. (3 years)	2018	6.964
Cites / Doc. (3 years)	2019	8.017
Cites / Doc. (3 years)	2020	8.825
Cites / Doc. (3 years)	2021	9.211
Cites / Doc. (2 years)	1999	0.388
Cites / Doc. (2 years)	2000	0.505
Cites / Doc. (2 years)	2001	0.620
Cites / Doc. (2 years)	2002	0.563
Cites / Doc. (2 years)	2003	1.009
Cites / Doc. (2 years)	2004	1.071
Cites / Doc. (2 years)	2005	1.301
Cites / Doc. (2 years)	2006	1.414
Cites / Doc. (2 years)	2007	1.198
Cites / Doc. (2 years)	2008	1.582
Cites / Doc. (2 years)	2009	2.243
Cites / Doc. (2 years)	2010	2.850
Cites / Doc. (2 years)	2011	3.791
Cites / Doc. (2 years)	2012	6.026
Cites / Doc. (2 years)	2013	4.574
Cites / Doc. (2 years)	2014	4.520
Cites / Doc. (2 years)	2015	4.973
Cites / Doc. (2 years)	2016	5.531
Cites / Doc. (2 years)	2017	5.823
Cites / Doc. (2 years)	2018	6.531
Cites / Doc. (2 years)	2019	7.664
Cites / Doc. (2 years)	2020	8.838
Cites / Doc. (2 years)	2021	8.664

Total Cites

Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Cites	Year	Value
Self Cites	1999	6
Self Cites	2000	8
Self Cites	2001	4
Self Cites	2002	3
Self Cites	2003	3
Self Cites	2004	5
Self Cites	2005	2
Self Cites	2006	3
Self Cites	2007	6
Self Cites	2008	26
Self Cites	2009	12
Self Cites	2010	128
Self Cites	2011	310
Self Cites	2012	689
Self Cites	2013	558
Self Cites	2014	225
Self Cites	2015	505
Self Cites	2016	805
Self Cites	2017	692
Self Cites	2018	800
Self Cites	2019	659
Self Cites	2020	1262
Self Cites	2021	1264
Total Cites	1999	49
Total Cites	2000	59
Total Cites	2001	97
Total Cites	2002	101
Total Cites	2003	173
Total Cites	2004	159
Total Cites	2005	171
Total Cites	2006	171
Total Cites	2007	207
Total Cites	2008	346
Total Cites	2009	524
Total Cites	2010	750
Total Cites	2011	1142
Total Cites	2012	1823
Total Cites	2013	2292
Total Cites	2014	3244
Total Cites	2015	4364
Total Cites	2016	5521
Total Cites	2017	6150
Total Cites	2018	7744
Total Cites	2019	9412
Total Cites	2020	10458
Total Cites	2021	14111

External Cites per Doc

Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

Cites	Year	Value
External Cites per document	1999	0.331
External Cites per document	2000	0.405
External Cites per document	2001	0.600
External Cites per document	2002	0.695
External Cites per document	2003	1.111
External Cites per document	2004	1.062
External Cites per document	2005	1.374
External Cites per document	2006	1.541
External Cites per document	2007	1.396
External Cites per document	2008	1.739
External Cites per document	2009	2.056
External Cites per document	2010	2.478
External Cites per document	2011	2.919
External Cites per document	2012	3.646
External Cites per document	2013	3.605
External Cites per document	2014	4.479
External Cites per document	2015	4.594
External Cites per document	2016	5.104
External Cites per document	2017	5.279
External Cites per document	2018	6.273
External Cites per document	2019	7.494
External Cites per document	2020	7.793
External Cites per document	2021	8.408
Cites per document	1999	0.374
Cites per document	2000	0.468
Cites per document	2001	0.622
Cites per document	2002	0.701
Cites per document	2003	1.095
Cites per document	2004	1.060
Cites per document	2005	1.336
Cites per document	2006	1.513
Cites per document	2007	1.371
Cites per document	2008	1.793
Cites per document	2009	2.031
Cites per document	2010	2.896
Cites per document	2011	3.911
Cites per document	2012	5.751
Cites per document	2013	4.697
Cites per document	2014	4.771
Cites per document	2015	5.128
Cites per document	2016	5.911
Cites per document	2017	5.896
Cites per document	2018	6.964
Cites per document	2019	8.017
Cites per document	2020	8.825
Cites per document	2021	9.211

% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

Year	International Collaboration
1999	14.63
2000	13.73
2001	21.15
2002	14.55
2003	25.58
2004	30.00
2005	12.50
2006	16.05
2007	22.22
2008	14.29
2009	15.85
2010	18.10
2011	20.00
2012	21.74
2013	28.62
2014	33.89
2015	36.01
2016	35.96
2017	34.05
2018	34.92
2019	35.97
2020	31.24
2021	32.88

Citable documents

Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Documents	Year	Value
Non-citable documents	1999	1
Non-citable documents	2000	0
Non-citable documents	2001	1
Non-citable documents	2002	3
Non-citable documents	2003	5
Non-citable documents	2004	5
Non-citable documents	2005	5
Non-citable documents	2006	4
Non-citable documents	2007	7
Non-citable documents	2008	9
Non-citable documents	2009	9
Non-citable documents	2010	8
Non-citable documents	2011	7
Non-citable documents	2012	6
Non-citable documents	2013	7
Non-citable documents	2014	6
Non-citable documents	2015	11
Non-citable documents	2016	10
Non-citable documents	2017	9
Non-citable documents	2018	5
Non-citable documents	2019	6
Non-citable documents	2020	5
Non-citable documents	2021	4
Citable documents	1999	130
Citable documents	2000	126
Citable documents	2001	155
Citable documents	2002	141
Citable documents	2003	153
Citable documents	2004	145
Citable documents	2005	123
Citable documents	2006	109
Citable documents	2007	144
Citable documents	2008	184
Citable documents	2009	249
Citable documents	2010	251
Citable documents	2011	285
Citable documents	2012	311
Citable documents	2013	481
Citable documents	2014	674
Citable documents	2015	840
Citable documents	2016	924
Citable documents	2017	1034
Citable documents	2018	1107
Citable documents	2019	1168
Citable documents	2020	1180
Citable documents	2021	1528

Cited documents

Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Documents	Year	Value
Uncited documents	1999	93
Uncited documents	2000	86
Uncited documents	2001	95
Uncited documents	2002	90
Uncited documents	2003	75
Uncited documents	2004	70
Uncited documents	2005	55
Uncited documents	2006	45
Uncited documents	2007	65
Uncited documents	2008	75
Uncited documents	2009	96
Uncited documents	2010	48
Uncited documents	2011	49
Uncited documents	2012	37
Uncited documents	2013	68
Uncited documents	2014	104
Uncited documents	2015	103
Uncited documents	2016	91
Uncited documents	2017	101
Uncited documents	2018	90
Uncited documents	2019	88
Uncited documents	2020	67
Uncited documents	2021	104
Cited documents	1999	38
Cited documents	2000	40
Cited documents	2001	61
Cited documents	2002	54
Cited documents	2003	83
Cited documents	2004	80
Cited documents	2005	73
Cited documents	2006	68
Cited documents	2007	86
Cited documents	2008	118
Cited documents	2009	162
Cited documents	2010	211
Cited documents	2011	243
Cited documents	2012	280
Cited documents	2013	420
Cited documents	2014	576
Cited documents	2015	748
Cited documents	2016	843
Cited documents	2017	942
Cited documents	2018	1022
Cited documents	2019	1086
Cited documents	2020	1118
Cited documents	2021	1428