Similar concepts
Pages with this concept
| Similarity |
Page |
Snapshot |
| 105 |
search
...Interactive search formulation A user confronted with an automatic retrieval system is unlikely to be able to express his information need in one go
...1 the frequency of occurrence in the data base of his search terms;2 the number of documents likely to be retrieved by his query;3 alternative and related terms to be the ones used in his search;4 a small sample of the citations likely to be retrieved;and 5 the terms used to index the citations in 4
...All this can be conveniently provided to a user during his search session by an interactive retrieval system
...The sample of citations and their indexing will give him some idea of what kind of documents are likely to be retrieved and thus some idea of how effective his search terms have been in expressing his information need
...Examples,both operational and experimental,of systems providing mechanisms of this kind are MEDLINE [11]...We now look at a mathematical approach to the use of feedback where the system automatically modifies the query
...Feedback The word feedback is normally used to describe the mechanism by whicha system can improve its performance on a task by taking |
| 7 |
systems store only a representation of the document or query which means that the text of a document is lost once it has been processed for the purpose of generating its representation
...When the retrieval system is on line,it is possible for the user to change his request during one search session in the light of a sample retrieval,thereby,it is hoped,improving the subsequent retrieval run
...Secondly,the processor,that part of the retrieval system concerned with the retrieval process
... |
|
|
