concept extraction and induction 概念抽取和归纳
They are: study content of child psychology, the concept induction of child singing psychology, the psychological characteristics of child singing study.
主要内容包括：儿童心理学的研究内容、音乐心理学与声乐心理学的概念、儿童声乐心理特点。
On the basis of the mathematical model of induction machine, simplified mathematical model is deduced, at the same time the theory of DTC is introduced with the concept of space vector.
本文从异步电机的数学模型出发，推导了异步电机简化数学模型，同时结合空间矢量的概念介绍了直接转矩的基本原理。
And drafted to the tax revenue accepts relational the concept and the characteristic has carried on the induction and the summary.
并对税收征纳关系的概念和特征进行了归纳和总结。
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