The first method is based on the artificial potential field. And the second one is suggested by Rapidly-exploring Random Tree (RRT) and rolling windows planning.

第一是基于人工势场的方法，第二是快速随机搜索树和滚动规划的结合方法。

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According to the complicated mine environment when a mine disaster occurred, a class expansion type rapid expanded random tree (CERRT) algorithm for the mine rescue robot was provided.

针对煤矿灾害发生后复杂的矿井环境，提出一种用于救援机器人的分级扩展式快速扩展随机树(CERRT)算法。

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Last spring, Julie Johnstone, a librarian at the Scottish Poetry Library in Edinburgh, was wandering through a reading room when she saw, sitting alone on a random table, a little tree.

去年春天，当爱丁堡苏格兰诗歌图书馆的管理员朱丽∙乔斯顿在阅读室巡视时，发现了一个形似小树的雕刻被随意摆放在桌上。

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As its name suggests, this spins the software equivalent of a roulette wheel to generate a random tree, then examines how snugly the branches of that tree fit the modern foliage.

ECONOMIST: The evolution of language: Babel or babble? | The

It then spins the wheel again, to tweak the first tree ever so slightly, at random.

ECONOMIST: The evolution of language: Babel or babble? | The

WHO's Essential Drugs Programme (a worthy attempt to work out a minimum list of the drugs that should be available in every country in the world), describes the organisation as being like a Christmas tree on whose branches new projects are hung at random, frequently without regard to what is there already.

ECONOMIST: Repositioning the WHO