Therefore, the calculation of critical speed of anisotropic supporting rotor-bearing system of the PMSM is a typical mechanical and electrical coupling problem.

因此，永磁同步电动机转子-轴承系统临界转速计算是一个典型的机电耦合问题。

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High frequency harmonic in electric power network can pollute the network, control high frequency harmonic is an important research problem in electrical system function.

电网中的高次谐波对电网有污染，抑制高次谐波是电力系统运行中的重要研究课题。

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Through setting up reasonable earth-electricity model, the distribution problem of electrical potential in uneven medium is resolved and system detection accuracy is improved.

通过建立合理的地电模型，解决了非均匀介质条件下的电势分布问题，进而提高了系统的检测精度。

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The main problem with the Dreamliners has been its electrical system, which has been under scrutiny for quite some time.

FORBES: Boeing In A Race Against Time As Entire 787 Dreamliner Fleet Grounded On Battery Issue

Mercedes' Nico Rosberg, who set the fastest time in first and second qualifying sessions, retired on lap 27 due to an electrical failure, while Sauber driver Nico Hulkenberg did not even start the race due to a fuel-system problem.

NPR: Lotus' Raikkonen Wins F1's Australian GP