On the base of all kinds of topology structure, introduce common PWM control method, and make detail analysis and comparison about it.
在各种拓扑结构的基础上，介绍了比较常用的各种PWM控制方法，并对其进行了详细地分析和比较。
The paper introduces in detail the working principle and make-up of the hydraulic synchronisation lifting device for lifting a high portal crane and gives an overall analysis of its hydraulic system.
文章详细介绍了超大型高架门座式起重机液压同步预升设备的工作原理和液压系统组成，并对液压系统进行了较全面的分析。
In this paper, it is discussed in quite detail how to make logarithmic concentration diagrams in the REDOX titration analysis and how to apply them.
文中就对数浓度图在氧化还原滴定分析中的绘制及其应用进行了较为详细的讨论。
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