This thesis investigates the semantic and syntactic properties of Chinese negation marker Bu 'not'.
本文主要研究汉语否定标记“不”的语义特征及句法性质。
This thesis investigates the design and implementation of a full-digital matrix converter for PMSM drive systems.
本文旨在研制一套全数位化矩阵转换器驱动永磁同步电动机系统。
Secondly, this thesis investigates the designing methods for VOR/DME-based area navigation flight procedure (RNAV FP).
其次，研究了基于VOR/DME导航台的区域导航飞行程序的设计方法；
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