Hi! I am very excited to announce the availability of Apache Solr 4.10 with RankingAlgorithm 1.5.4.
Solr 4.10.0 with RankingAlgorithm 1.5.4 includes support for complex-lsa. complex-lsa simulates human language acquisition and recognition (see demo <http://solr-ra.tgels.org/rankingsearchlsa.jsp> ) and can retrieve semantically related/hidden relationships between terms, sentences, paragraphs, chapters, books, images, etc. Three new similarities, TERM_SIMILARITY, DOCUMENT_SIMILARITY, TERM_DOCUMENT_SIMILARITY enable these with improved precision. A query for holy AND ghost returns jesus/christ as the top results for the bible corpus with no effort to introduce this relationship (see demo <http://solr-ra.tgels.org/rankingsearchlsa.jsp> ). This version adds support for multiple linear algebra libraries. complex-lsa does a large amount of this calcs so speeding this up should speed up the retrieval etc. EJML is the fastest if you are using complex-lsa for a smaller set of documents, while MTJ is faster as your document collection becomes bigger. MTJ can also use BLAS/LAPACK, etc installed on your system to further improve performance with native execution. The performance is similar to a C/C++ application. It can also make use of GPUs or Intel's mkl library if you have access to it. RankingAlgorithm 1.5.4 with complex-lsa supports the entire Lucene Query Syntax , ± and/or boolean/dismax/glob/regular expression/wildcard/fuzzy/prefix/suffix queries with boosting, etc. This version increases performance, with increased accuracy and relevance for Document similarity, fixes problems with phrase queries, Boolean queries, etc. You can get more information about complex-lsa and realtime-search performance from here: http://solr-ra.tgels.org/wiki/en/Complex-lsa-demo You can download Solr 4.10 with RankingAlgorithm 1.5.4 from here: http://solr-ra.tgels.org Please download and give the new version a try. Regards, Nagendra Nagarajayya http://solr-ra.tgels.org http://elasticsearch-ra.tgels.org http://rankingalgorithm.tgels.org Note: 1. Apache Solr 4.10 with RankingAlgorithm 1.5.4 is an external project.
