Then we proposed a stochastic expected value model to improve the on-line performance of timetable and reduce total travel time on the basis of considering interactions among various slack times.

首先，给出了冗余时间的含义与分类，探讨了冗余时间对列车运行图动态性能的影响过程，并分析了多种冗余时间之间的关系。

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And, as mining business constitutes nearly 42% of the total value of Caterpillar, the slowdown in the industry is expected to impact the company significantly in the short-term.

FORBES: Caterpillar Is Worth $95 On Long Term Fundamentals