This paper analyses characteristics of readers' information demand and change of compound library times from conception and characteristics of compound library.
从复合图书馆的概念和特点出发，分析了复合图书馆时代读者的信息需求特点和需求变化情况。
Structural demand modules include: demand characteristics confirmed, the demand information classification, feature constraint identified, the mapping rules established.
结构化需求模块主要包括：需求特征确定、需求信息分类、特征约束确定、映射规则建立。
According to the demand characteristics, we complement the main information with the data of past products'. The model is revised with seasonal factor.
针对短生命周期产品的特点，我们利用类似产品补充主要信息，并对模型进行了季节性修正。
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