The establishment and implementation of regulations and standards on foods for infants and young children are very important to the safety of children.

Case analysis of articles published in sci tech periodicals for their violation of trade standard and statute;

In order to provide theory and method for solving this kind of problem,aiming at a subproblem of it that eight parallel activities are adjusted to four pairs of sequence activities,on the basis of barycenter theorem, row-mate′s tardiness theorem and optimal row-mate theorem,the standard-criterion algorithm is designed and proved.