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<Paper uid="W03-2005">
  <Title>Term Distillation in Patent Retrieval</Title>
  <Section position="11" start_page="1" end_page="1" type="evalu">
    <SectionTitle>
6 Results on ad-hoc patent retrieval
</SectionTitle>
    <Paragraph position="0"> In Table 3, we show evaluation results corresponding to various combinations of topic elds in use. The documents judged to be \A&amp;quot; were taken as relevant ones.</Paragraph>
    <Paragraph position="1">  Inthe table, the elds\t&amp;quot;, \d&amp;quot;, \c&amp;quot;, \n&amp;quot; or\s&amp;quot; correspond to title, description, concept, narrative or supplement respectively. As a result, the combination of \t,d,c&amp;quot; produced the best retrieval performance for a set of the formal run topics. Pseudo-relevance feedback had a positive eect except for the case using a title eld only.</Paragraph>
  </Section>
class="xml-element"></Paper>