6. The method of claim 5 , wherein each component a j of the at least one ranking vector a is incremented by an amount proportional to a difference between components a j and u j of the ranking vectors a and u, the amount being computed from κ*(u j −a j ), κ being an interaction coefficient.
7. The method of claim 6 , further comprising: keeping a record of the at least one ranking vector a after each interaction of the interactions, generating a trajectory of the at least one ranking vector a as a function of the interactions, and predicting values of components of the at least one ranking vector a by extrapolating the trajectory to extrapolate the at least one ranking vector a and evaluating the extrapolated at least one ranking vector a.