课程名称︰索引及摘要 课程性质︰系内选修 (知识管理学程) 课程教师︰唐牧群 开课学院：文学院 开课系所︰图资系 考试日期（年月日）︰2010/06/24 考试时限（分钟）：110 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : Answer 6 out of the following 7 questions, each of which will account for 5 points of your final grade. 1. What are the three major dimensions of indexing and how might they impact retrieval effectiveness? 2. Define "R-about" proposed by Maron; explain how it is related to "user-oriented" indexing, 3. What might have caused "large retrieval phenomenon" when searching with OPAC(Lancaster); and when searching with WWW search engines ? How can it be allevited in either situation ? 4. Salton stated that TF takes care of recall function (representation), and IDF precision (discrimination) function, how is that ? (hint: you might want to start with the relationship between TF and exhaustivity, and that between IDF and specificity). 5. Explain Panofsky's iconography and how it is related to image indexing. 6. How does automatic compare to human indexing in terms of retrieval performance ? Specifically, what characteristics associated with each indexing method might affect recall and precision ? (Hint, redundancy; spurious relationship; synonymy, etc). 7. Explain automatic indexing procedures. --

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