Notice of RetractionResearch of probability risk assessment based on expanded ESD dynamic system

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE\´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

In safety risk research of complex dynamic systems, many methods of improved dynamic system probability risk assessment (PRA) can not be applied widely in the field of engineering because of their limitation; therefore this paper introduces dynamical PRA conception. It studies the expanding of ESD on the base of existing event sequence diagram (ESD) to overcome the deficiency of symbol expressing capability of the ESD method. The paper invents some new logical modeling symbols like "N/K" gate, sequence gate, expandable gate and constraint, to enhance the modeling capability of the ESD and to overcome the drawbacks in connections with products and size of the ESD method. To enhance the ability of dealing with problems of dynamic PRA, the ESD modeling process and the layered model are studied in detail. In order to improve the comprehensive capability of ESD method, this paper explains ESD/FT method, and ESD/M method, to make it to have the capability of solving the complex dynamic PRA problem.