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1·That portion of a message terminated by an EOB or ETB line-control characters, if it is the last block in the message, by an EOT or ETX line-control character.

如果它是报文中最后一个 块，则用一个 传输 结束（EOT）或文本 结束（ETX）线路控制字 符来终止。

2·A mathematical model was set up for the ETB system. Based on it, an improved PID control algorithm and a varying sliding mode control algorithm were proposed and verified in MATLAB/SIMULINK.

建立了电子节气门体的数学模型，并以此被控对象在MATLAB/SIMULINK中设计并验证了改进型PID与变滑模控制器算法。