15
Observations
nResults show:
n(1) The CRE-K method works well under both
scenarios; (2) The
CRE-A method produces satisfactory results only if the required assumptions are satisfied;
nThe second set of experiments
evaluate the performance
of BDES method with other three existing methods in terms of the accuracy of predictions generated under five
behavior patterns.
nBehavior patterns: random, stable,
trend, jumping, two phase
nExperiments compare the absolute and relative
errors between
real ratings and predictions generated by each method
nResults show:
n(1) For random behavior pattern,
none of the evaluated methods
is able to produce reasonable good results. (2) For stable behavior pattern, all methods produce
similar good results.
(3) For trend, jumping, or
two-phase behavior patterns,
BDES outperforms the other three ones.