The problem of collecting and delivery shunting of non-through wagon flow on the actinoid private line belongs to a kind of the combinatorial optimization problems.

放射形专用线非直达车流送车问题属于一类组合优化问题,素较多。

This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.

离交换剂在谱中得到了广泛的应用，本文详细总结了离交换剂在分析化学中用于碱金属、碱土金属、贵金属、稀土元素、锕系元素等的分离与测定。