A kind of centralized and decentralized control system with PLC is introduced in this paper by contrast method.

采用对比方式，介绍了一种用PLC实现的集散型控制系统。

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Methods Medical records of the top 10 inpatients' diseases from 2005 to 2009, including disease composition, precedence, age and gender were collected and analyzed by contrast method.

方法收集2005 ~ 2009年某院住院病人前10位疾病资料，运用对比分析方法对发病的构成、顺位、年龄、性别进行统计。

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The method was illustrated by experiment on plain laser paper to combine relative contrast and color contrast to obtain optimum solid density of printing.

以素面镭射纸为例，通过实验，阐述了结合相对反差和色彩反差来确定印刷最佳实地密度的方法。

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Dr Zhou's method, by contrast, employs a process called electron-field emission.

ECONOMIST: Modern X-ray technology

The method used for the RPI, by contrast, implicitly assumes that consumers do not react this way.

ECONOMIST: The switch in price indices