The magnetic field and mutual inductance are calculated with 3-d (three-Dimensional) finite element method for some types of current transducer.

用三维有限元方法分析计算了几类电流互感器的三维磁场和互感系数。

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The paper discusses an automated real time 3-d (three-dimensional) tunnel monitoring system. In Singapore, every construction project near operating Metro tunnels requires such a system.

本文讨论地铁隧道的自动化实时三维监测系统。在新加坡地铁沿线保护区内开展建设项目时，都必须应用这样的系统对地铁隧道进行安全监测。

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Nintendo also is piggybacking off the success 3-D has had in movie theaters, with three-dimensional titles such as "Avatar" setting box-office records.

CNN: Nintendo unveils handheld 3-D gaming system

Instead of collecting data in two dimensions using streamers and then processing the data to produce a 3-D image, they decided to move to three-dimensional acquisition.

ECONOMIST: Inside story