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本文重点对布拉德福定律中Ｇｒｏｏｓ下垂问题进行了研究，并首次给出了一个描述论文在期刊中分布规律的低频公式。本文的工作包括三个部分：１）对布拉德福定律与布拉德福统计数据（１９３４）的吻合情况进行了检验，指出布拉德福定律与布拉德福数据之间存在的明显差异；２）作为本文的重点，给出了一个描述论文在期刊中分布规律的低频公式，并用布拉德福（１９３４）和Ｐｏｐｅ（１９７５）给出的经典统计数据进行了验证，证明了公式的正确性；３）将本文提出的低频公式应用于对布拉德福统计数据的修正，并通过计算表明，利用本文给出的低频公式修正后的布拉德福数据同布拉德福定律的图象描述取得了高度的一致，证明了本文低频公式的应用价值。
This paper focuses on the Groin sagging problem in Bradford’s Law, and for the first time presents a low-frequency formula that describes the distribution of papers in journals. The work in this paper consists of three parts: 1) Tests for the agreement between Bradford’s Law and Bradford’s statistics (1934) indicate that there is a clear correlation between Bradford’s Law and Bradford’s data Differences; 2) As the focus of this article, a low-frequency formula describing the distribution of theses in journals is given and verified by classic statistics given by Bradford (1934) and Pope (1975) ; 3) Apply the low-frequency formula proposed in this paper to the correction of Bradford’s statistics, and show that the Bradford’s data modified by the low-frequency formula given in this paper is the same as Bradford’s law Image description obtained a high degree of consistency, proved the value of the low-frequency formula of this article.