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以我国数学工作者的引文为数据源,采用以文献被引频次灰色预测为基础的文献老化历时半衰期测定方法进行测定,测得数学文献老化的历时半衰期大于13年。
Using the citations of maths workers in our country as the data source, the measurement of half-life in aging of documents based on the sub-gray prediction of the cited documents was carried out. The measured half-life of aging in maths literature was more than 13 years.