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In subway systems, the energy put into accelerating trains can be reconverted into electric energy by using the motors as generators during the braking phase. In general, except for a small part that is used for onboard purposes, most of the recovery energy is transmitted backward along the conversion chain and fed back into the overhead contact line. To improve the utilization of recovery energy,...
A two-echelon inventory system of repairable items is considered. For the repairable items with high-value and low- demand rate that include condemnation, continuous (S-1,S) ordering strategy is adopted. Neighbor support strategy for inventory pooling is presented to obtain high service levels at a low cost. The premise of neighbor support is that it is more efficient to obtain needed stock from the...
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