The duty ratios of switches in each switching cycle can be directly obtained by simple calculation using two phases source currents and dc bus capacitor voltage.

只需检测两相电源电流和直流侧电容电压，通过简单计算就可直接求出每个开关周期内各开关的占空比。

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On -board emission test system (OBS) is used to evaluate the emission level of a heavy duty hybrid bus to see whether the on -board energy recycle device could improve emission level.

使用车载排放测量系统(OBS)对一台重型混合动力公交车的排放水平进行评估，以检验被测车辆上装载的能量回收装置能否改善排放。

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This thesis studied certain light-duty bus, which analyzed braking process of this bus and built whole vehicle model, single wheel model, tire model and arrester model.

本文以某轻型客车为研究对象，对该车制动过程进行分析，建立了整车模型、单轮模型、轮胎模型和制动器模型等。

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Off-duty bus drivers are visiting depots in London in an open-top bus to demand extra pay for working during the Olympic Games.

BBC: Bus drivers on open-top protest bus

Crochet was something that was easy for me to pack up and take while waiting for an appointment or waiting in Frankfurt Germany to catch a bus to our next duty station.

FORBES: Teresa Richardson: The 'Crochet Geek' Who's Hooked 60,000 YouTubers

After some time as a substitute bus driver, Poland began full-time duty shuttling students around Dale County four years ago.

CNN: STORY HIGHLIGHTS