In the pressurized head box control system of paper machine, the characteristic of nonlinear and strong coupling always appears, and makes the system control difficult.

在造纸机的加压网前箱控制系统中，通常会出现强耦合和非线性的特性，给系统控制带来困难。

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This paper introduces the characteristic of head-branch library system of Dongguan library, and sums up the social effect of reader's activities jointly carried out on the background.

论文概述了东莞图书馆总分馆的特点，总结了在此背景下联合开展读者活动所取得的社会成效。

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