Mix [Obj,Obj]

Description

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

Input

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

Output

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

Parameters

  • Input Score normalisation

    • None: don’t change probabilities as they come in

    • Max: divide by the maximum score in each input

    • Standard: performs standard score normalisation “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