Journal profile · Mathematics, Interdisciplinary Applications
Journal of Grey System
ISSN 0957-3720 · Research Information Ltd · ENGLAND · Quarterly
Journal of Grey System: CAS Zone 4 · Engineering (2025 upgraded edition); impact factor 1.34; subscription journal; review about 1.5 months (community reports); community-reported acceptance: about 65%; 60 articles a year; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
Journal of Grey System is published by Research Information Ltd and is in Zone 4 of Engineering in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Grey System Theory Applications, Advanced Algorithms and Applications and Evaluation Methods in Various Fields, together about 66.6% of its articles. (generated from OpenAlex topic counts and CAS ranking data)
The journal is a forum of the highest professional quality for both scientists and practitioners to exchange ideas and publish new discoveries on a vast array of topics and issues in grey system. It aims to bring forth anything from either innovative to known theories or practical applications in grey system. It provides everyone opportunities to present, criticize, and discuss their findings and ideas with others. A number of areas of particular interest (but not limited) are listed as follows: Grey mathematics- Generator of Grey Sequences- Grey Incidence Analysis Models- Grey Clustering Evaluation Models- Grey Prediction Models- Grey Decision Making Models- Grey Programming Models- Grey Input and Output Models- Grey Control- Grey Game- Practical Applications.
Source: LetPub
Research area (LetPub): Mathematics, Interdisciplinary Applications
Main research topics OpenAlex counts of recent articles; shares are approximate
- Grey System Theory ApplicationsDecision Sciences59.4%
- Advanced Algorithms and ApplicationsEngineering3.6%
- Evaluation Methods in Various FieldsEnvironmental Science3.6%
- Color perception and designPsychology2.6%
- Rough Sets and Fuzzy LogicComputer Science2.3%
- Advanced Decision-Making TechniquesComputer Science2.3%
- Remote Sensing and Land UseEarth and Planetary Sciences2.3%
- Extenics and Innovation MethodsEngineering2.3%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Engineering Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 4 |
| Minor | Mathematics, Interdisciplinary Applications | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Engineering Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 4 |
| Minor | Mathematics, Interdisciplinary Applications | Zone 4 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Engineering Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 4 |
| Minor | Mathematics, Interdisciplinary Applications | Zone 4 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 1.34LetPub ·
- CiteScore 2026-06
- 2.4LetPub ·
- SJR 2026-06
- 0.18LetPub ·
- SNIP 2026-06
- 0.46LetPub ·
- h-index
- 12LetPub ·
- h-index
- 15OpenAlex ·
- i10-index
- 22OpenAlex ·
- 2-year mean citedness
- 0OpenAlex ·
- Self-citation rate
- 41.2%LetPub ·
- Share of gold OA articles
- 1.35%LetPub ·
Volume
- Articles per year
- 60LetPub ·
Articles by year OpenAlex count · 282 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2021 | 28 | 0 | 52 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
- Average review time (community reports)
- about 1.5 monthsLetPub ·
- Average acceptance (community reports)
- 65%LetPub ·
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Subscription journalLetPub
A subscription journal: articles are read by subscription or purchase, and authors usually pay no publication charge.
No source has fee information yet; check the journal's website.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Profile
Publication details and official links
- Publisher
- Research Information Ltd
- Country or region
- ENGLAND
- Language
- English
- Frequency
- Quarterly
- ISSN
- 0957-3720
- Official links
- Journal homepage ↗OpenAlex
FAQ
Frequently asked questions about Journal of Grey System
What CAS zone is Journal of Grey System in?
In the 2025 upgraded edition of the CAS Journal Ranking, Journal of Grey System is in Zone 4 of Engineering, and in Zone 4 of the minor category Mathematics, Interdisciplinary Applications. In the 2026 Xinrui edition it is in Zone 4 of Engineering. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Journal of Grey System?
The latest impact factor listed by LetPub is 1.34; CiteScore 2.4, h-index 15.
How long does peer review take at Journal of Grey System?
Authors report an average review time of about 1.5 months; the community-reported acceptance is “about 65%”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index Journal of Grey System?
According to LetPub and DOAJ records, Journal of Grey System is indexed in SCIE and Scopus.
Is Journal of Grey System open access, and what is the APC?
Journal of Grey System is a subscription journal. Fee information is not available yet; check the journal's website.
Sources and updates
The facts on this page come from LetPub, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-25). Last updated: .