Online Knowledge-Based Model for Big Data Topic Extraction

Algorithm 2

Mine rules.

MineRules ( , , topics)

() procedure MineRules (, , topics)

()  for ( : all topics) do

()     for ( , : all word pairs in a topic) do

()      if (nPMI( , ) < μ1) then

()       Rules (, , nPMI(, ), topic) // learn as negative rule

()      end if

()      if (nPMI( , ) > μ2) then

()       Rule (, , nPMI(, ), topic) // learn as positive rule

()      end if

()  end for

()  end for

() end procedure