2.Determining the redundancy allocation xj of a given system to maximize the reliability function of the system or minimize the unreliability function of the system given constraints;3.

• 2、设已知各链路可靠性Rj，确定各链路的冗余数Xj，在满足特定约束条件下，使系统可靠性达到最大或不可靠性达到最小；