Optimizing the database queries is one of hard research problems. Exhaustive search techniques like dynamic programming is suitable for queries with a few relations, but by increasing the number of relations in query, much use of memory and processing is needed, and the use of these methods is not suitable, so we have to use random and evolutionary methods. The use of evolutionary methods, beca...

optimizing the database queries is one of hard research problems. exhaustive search techniques like dynamic programming is suitable for queries with a few relations, but by increasing the number of relations in query, much use of memory and processing is needed, and the use of these methods is not suitable, so we have to use random and evolutionary methods. the use of evolutionary methods, beca...

The problem of computer assisted literature search is often misstated as the attempt to nd, in a repository of electronic literature, a paper which, according to title and keywords, contains the desired information. This assumes that the original author was correct and complete in assigning keywords, and that the search criteria are free of preconceived expectations on the context in which the ...

Present kl-one-like knowledge base management systems (KBMS), whilst ooer-ing highly structured description languages aside eecient concepts classiication, have limited capability to manage large amounts of individuals. Data base management systems (DBMS) can, instead, manage large amounts of data eeciently, but give scarce formalism to organize them in a structured way, and to reason with them...