Mix [Obj,Obj]

Similar to the block Mix, but operates on combinations of objects. Combines pairs of objects from several inputs into a single output. Multiple merging/aggregation-techniques can be selected using the parameters. Most common scenario: if an object occurs in multiple inputs, it is an indication that this object is more relevant.

• MIXLIST [OBJ,OBJ]: one or more inputs that should be combined

• RESULT [OBJ,OBJ]: the combined output of all inputs

• Input Score normalization

  • None: don’t change probabilities as they come in
  • Max: divide by the maximum score in each input
  • Standard: performs standard score normalization "combSUM score combination" (J.H.Lee, 1997)

• Score combination

  • Disjunctive: objects must occur in at least 1 input (default)
  • Conjunctive : objects must occur in all inputs

• Score aggregation: defines how the output scores are calculated (when an instance occurs in multiple inputs)

  • SUM: sums the weights of the individual inputs. Use SUM if the signals are completely independent (default)
  • MAX: selects the highest weight of the object. Often used in combination with Conjunctive.
  • MIN: selects the lowest weight of the object
  • PROD: multiplies of the individual inputs. Often used in combination with Conjunctive.
  • AVG: selects the average weight of the object (only over inputs that contain the input)
  • DISTINCT: aggregates evidence (formula: 1 - prod(1 - p))
  • ALL: don't aggregate, and output all tuples from all inputs as is