【摘要】 本文通过具体事例的调查分析发现,各类复本的藏书在馆藏中的分布不仅具有一定的规律性,而且与读者需求量存在着某种联系。由此,借助 PB—700型计算机进行回归分析表明,它们之间存在着正相关性。据此,再通过拒借率的统计分析,发现拒借率与藏书复本数亦存在一元曲线回归关系,即双曲线关系。于是,根据双曲线存在一个最大曲率点,它将拒借率区间分为高拒借率和低拒借率区间,高拒借率区间不利于满足读者需要,而低拒借率区间不利于节约经费和藏书流通的原理,求出这个最大曲率点的坐标即为最佳藏书复本量的值和对应的理想拒借率。更多还原

【Abstract】 Taking cases as objects for investigation,the paper points that the distribution of copy number of the differentcollections in libraries not only is possessed of a certain law,but also exists in some relativity with the number ofuser needs.And,by the help of computer-aided regression analysis,it indicates that there is a positive correlation.Meanwhile,based on the statistics analysis of refused rates,it finds that there is a monadic curve(hyperbola)regression relationship between the refused rates and the collection copy number.So,on the principle of the biggestpoint of curvature of hyperbola,which divides refused rates in high and low regions,the optimal collection copynumber and theory refused rates have been obtained by the authors in the calculation of coordinates of the biggestpoint of curvature.更多还原