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On Event Spaces and Probabilistic Models in Information Retrieval

机译:信息检索中的事件空间和概率模型

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摘要

A basic notion of probability theory is the event space, on which the probability measure is defined. A probabilistic model needs an event space. However, some classes of events (which we may want to model probabilistically) exhibit structure which does not fit well into the traditional event space notion. A simple one-to-many example is discussed at length. The information retrieval case, involving queries, documents and relevance, is analysed. The event space issue makes for some difficulty in comparing different probabilistic models in IR.
机译:概率论的基本概念是事件空间,在事件空间上定义了概率度量。概率模型需要一个事件空间。但是,某些类型的事件(可能需要对其进行概率建模)显示的结构与传统事件空间概念不太吻合。详细讨论了一个简单的一对多示例。分析了涉及查询,文档和相关性的信息检索案例。事件空间问题使在IR中比较不同的概率模型时有些困难。

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