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Table 1 Tuning of the search engine regarding the prior art search task.

From: Development and tuning of an original search engine for patent libraries in medicinal chemistry

Strategy Tuning P0 MAP
Impact of the description field Description 2.20% 1.34%
  No description 2.87% 1.52%
Impact of the metadata field No metadata 3.64% 1.93%
  Metadata on TAC 3.63% 1.92%
  Metadata on TACD 2.87% 1.52%
Impact of the weighting model PL2 2.87% 1.52%
  BM25 5.36% 3.47%
Impact of the co-citation network Without re-ranking 5.36% 3.47%
  With re-ranking 6.76% 4.22%
Impact of the use of IPC codes No IPC codes 6.76% 4.22%
  IPC codes 5.88% 3.66%
  1. The best tuning for each strategy is displayed in bold. P0 indicates the top-precision and MAP represents the mean average precision.