方法对比

	新兴资源引文索引	开放获取期刊目录	Ulrichsweb Global Serials Directory
领域	文献计量学	文献计量学	文献计量学
方法族	Process / pipeline	Process / pipeline	Process / pipeline
起源年份	2015	2003	1932
提出者	Clarivate Analytics	DOAJ Community (Swedish library consortium, later expanded to international consortium)	Bowker (originally R.R. Bowker), now ProQuest LLC
类型	Database	Database	Database
开创性文献	Clarivate Analytics. (2024). Emerging Sources Citation Index. Retrieved from https://clarivate.com/webofsciencegroup/solutions/web-of-science-core-collection/	Directory of Open Access Journals. (2024). About DOAJ. Retrieved from https://doaj.org/	ProQuest. (2024). Ulrichsweb: Global Serials Directory. Retrieved from https://ulrichsweb.serialssolutions.com/
别名	ESCI, Web of Science Emerging Sources Citation Index	DOAJ, Directory of Open Access	Ulrichsweb, Ulrich's International Periodicals Directory, Ulrich's Directory
相关	5	5	4
摘要	The Emerging Sources Citation Index (ESCI) is a supplement to Web of Science Core Collection launched by Clarivate Analytics in 2015 to expand journal coverage beyond the traditional Science Citation Index Expanded (SCI-E), Social Sciences Citation Index (SSCI), and Arts & Humanities Citation Index (A&HCI). ESCI includes high-quality, peer-reviewed journals that are newer, from underrepresented geographic regions, or from emerging disciplines not yet established in traditional indexes. Unlike SCI-E/SSCI journals, ESCI journals do not initially receive Impact Factor calculations. However, ESCI serves as a pathway: journals demonstrating sustained citation impact and adherence to quality standards may be promoted to SCI-E/SSCI and gain Impact Factor recognition. ESCI addresses systematic geographic and disciplinary biases in traditional indexing by including quality journals from developing economies, Eastern Europe, Latin America, and Asia.	The Directory of Open Access Journals (DOAJ) is a community-maintained, freely accessible directory of high-quality, peer-reviewed open-access journals and articles established in 2003. DOAJ indexes over 20,000 open-access journals across all disciplines (sciences, social sciences, humanities, arts) from diverse geographic regions. The directory serves researchers, librarians, and administrators as the authoritative curated list of legitimate open-access journals—differentiating quality open-access publications from predatory journals that lack genuine peer review. DOAJ quality seal, awarded to journals meeting stricter governance and transparency criteria, enables identification of the highest-caliber open-access publications.	Ulrichsweb is a comprehensive, subscription-based global serials directory cataloging over 300,000 print and electronic journals, magazines, newspapers, and other periodical publications. Developed by ProQuest (originally R.R. Bowker), Ulrichsweb has served librarians and researchers for over 90 years as the authoritative source for journal metadata, publication information, and peer-review verification. A unique feature is Ulrichsweb's verification program: editorial staff contact journals directly to confirm peer-review claims, marking journals as 'refereed' only after validation. This verification process distinguishes legitimate peer-reviewed journals from predatory publishers falsely claiming peer review.