The introduction typically begins with a general statement of the problem area, with a focus on a specific research problem, to be followed by the rational or justification for the proposed study.
引言一般以对该领域的简单描述开始，同时关注某一特定的研究问题，接下来是拟定研究的基本原理。
For the vast objects in industry control, the specific delay feature exists. It is valuable to study the control problem of the system with pure delay for control theory and control engineering.
工业控制中许多对象都具有纯滞后特征，对纯滞后系统的控制问题进行研究，具有理论意义和实际应用参考价值。
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