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统计了2002～2004年中文化学工业类核心期刊在 Ei 数据库中的收录量和收录比例。结果表明,3年中中文化学工业类核心期刊被 Ei 收录的文献总量和收录比例呈上升趋势,但被收录的期刊尤其被 Ei 光盘版收录的期刊不够多。
Statistics 2002-2004 Chinese Chemical Industry core journals in the Ei database included and included in the ratio. The results showed that the total number of literatures and the percentage of collected articles of Chinese chemical core journals collected by Ei in three years was on the rise. However, there were not enough journals in the periodicals included in the Ei CD.