阐述了工控系统的定义、分类及各主要特点，并详细介绍了应用在粮食加工行业中的工控系统及主要构成。

The definition, classification and main characteristics of industry control system are expounded. Its application in grain processing is introduced and its structure is analyzed.

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文章利用广义方差分解研究了沪市各个分类指数之间的关系，显示了系统冲击在各个行业指数之间传递的特点。

Using the new method, the paper studies the interrelationships between the five ShangHai sector indexes. The results suggest that the shock to one in…

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