WITH A MAXIMUM speed of 430kph (267mph), the Shanghai magnetic-levitation (or maglev) train is as much fairground rideas vital cog in the city’s transport system.

最高时速430公里（267英里）的上海磁悬浮不仅是一条展示线，也是该市交通系统重要的组成部分。

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A speed and position detection method for high-speed maglev train driven by long-stator synchronous linear motor, based on measuring cog-slots of the long-stator, was presented.

针对长定子直线同步电机驱动的高速磁悬浮列车，提出了采用对定子齿槽进行计数的测速定位方案。

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Make your way to Cosmo Velho, where the slightly unnerving cog train to the 710m-high peak known as Corcovado ascends through protected Tijuca National Forest to the Cristo Redentor, one of the most impressive monuments and urban views on earth.

BBC: A perfect day in Rio de Janeiro