去年，耶鲁大学的一群物理学家想出了一个叫作时间反演激光器的东西，来实现这个逆过程。

Last year, a group of physicists at Yale University proposed a way to do just that with something called a time-reversed laser.

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该文介绍了如何将角色反演算法的思想用在多信息源多语种问答系统中来构建句法分析器。

This paper introduces how to use the concept of Role Inverse Algorithm in order to build syntactic parser in the various information resources based multi-lingual question answering system.

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该方法通过在反演设计中引入滑模控制来改进反演的最后一步算法，并简化控制器的设计。

It introduces the SMC in backstepping design to modify the last step of backstepping algorithm and simplify the design of controller.

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