零增长理论（Zero-growth Theory），又称稳定状态理论（Steady State Theory），是一种具有国际影响的控制图书馆藏书数量增长的理论。
摘要本文依据“藏书零增长理论”对图书馆过期期刊的保存期问题进行探讨。
According to the zero - growth theory of library collection, this paper approaches the retention period about the back number of periodicals in library.
本文推演了城市系统中在人口零增长假设条件下的人口迁移理论模型；
This paper deduces a theoretical population model in a urban system under a hypothetical condition of zero population growth (ZPG), and analyses the population dynamics for the model.
结果表明，本文提出的理论方法不仅完善了传统方法而且克服了传统方法测定林分断面积、蓄积量零增长及跳跃现象。
The results show that the methods suggested by author not only improve the traditional method but also eliminate the phenomenon of zero and jumping in the estimation of basal area and volume incr...
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