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据中国科学技术信息研究所 2 0 0 0年 11月发布的《1999年度中国科技期刊引证报告》中对国内 1372种主要科技期刊的统计 ,《北京大学学报 (自然科学版 )》1999年的计量指标如下 :被引频次 :2 0 4 (列全国 85种综合类学术期刊的第 12位 ) ;影响因子 :0 2 4 7(列全国 85种综合类
According to the statistics of the 1372 kinds of major scientific and technical journals in China published in the “Citation Report of Chinese Sci-tech Journals in 1999” released by China Institute of Science and Technology Information in November 2000, the measurement of 1999 in Journal of Peking University (Natural Science Edition) The indicators are as follows: Cited frequency: 204 (listed in the national 85 kinds of comprehensive academic journals 12); Impact factor: 0 2 4 7