BP network model and BP algorithm are also researched and BP algorithm is improved by adding the momentum item and self-adapting the length of train step.

研究了BP网络模型和BP算法，并对BP算法进行了加入动量项和自适应调节步长的改进。

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One helpful step is to train lunchtime supervisors to distinguish bullying from playful fighting, and help them break up conflicts.

其中一个有用的步骤是培训午餐时间的监督人，让他们区分欺凌与嬉戏打闹，并帮助他们化解冲突。

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Toad got down on the step, and as the train slowed down to almost a walking pace, he heard the driver call out, "Now, jump!"

蟾蜍踩下踏板，火车减速至与步行差不多时，他听到司机一声喊：“现在，跳！”

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Hall-Trujillo and veteran chapter leaders train women who step up and create chapters in their own communities.

CNN: STORY HIGHLIGHTS

But Lallement takes this train of thought even a step further.

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The second step concerns the train operating companies.

ECONOMIST: Mending Britain��s rotten railways