本文以企业的知识管理活动为主要研究对象，以管理本质的二重性作为分析展开的框架。
I select knowledge management of enterprises as main object to analyze and approach this issue from two aspects of the nature of management.
本文以有源磁轴承的数字控制系统为主要研究对象。
The main aim of this thesis is to study and implement the digital control system for magnetic bearing.
本文以服装广告中影响消费者购买决策的因素作为主要研究对象。
In this paper, clothing ads affect consumer purchase decision-making as a major factor in the study.
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