根据统计得到的典型桥例为基准，采用MIDAS有限元软件分析桥例的结构动力特性；

Then identify a typical half-through CFST arch bridge accordingly as a benchmark bridge, dynamic characteristic were illustrated by MIDAS FEA.

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有低的差动输出阻抗绝大多数的线路驱动器，同时也固有地有低的共模输出阻抗，这样，低阻抗桥臂几乎无一例外地位于驱动器一侧。

Most line drivers with low differential output impedance will also have inherently low common-mode output impedances, so the low impedance arms of the bridge are almost always at the driver.

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方法经临床、手术病理证实的桥小脑角区肿瘤61例，回顾性分析其低场MRI表现。

Methods: The manifestations of low field MRI in61cases with tumors in cerebellopontine Angle region documented by operation and pathology were analyzed retrospectively.

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