《中国科学：信息科学》确实是EI期刊。在其官方网站的英文版介绍上有这么一段介绍（可以上官网求证）：SCIENCE CHINA Information Sciences (Sci China Inf Sci, SCIS) is indexed by Science Citation Index Expanded (SCIE), Engineering Index (EI), Journal Citation Reports/Science Edition (JCR), Academic OneFile, Astrophysics Data System (ADS), CSA, Cabells, Current Contents/Engineering, Computing and Technology, DBLP, Digital Mathematics Registry, Earthquake Engineering Abstracts, Engineered Materials Abstracts, Gale, Google, INSPEC, Mathematical Reviews, OCLC, ProQuest, SCOPUS, Summon by Serial Solutions, VINITI这也就是说这份期刊是被包括EI在内的不少国际专业文献数据库所收录的。
格桑之门
