时间Petri网在现场通信系统中的分析方法

Analytical Method of Time Petri Net in Field Communication System

介绍了在现场检测仪表中应用与现行4～20mA模拟信号兼容的数字通信HART协议的研制工作。

Research work on the application of HART protocol that is compatible with the currently operating 4~ 20 mA analog signal in field measuring instruments are described.

警方在现场附近发现了玻璃碎片。

Police found fragments of glass near the scene.

这是我初次在现场看戏。

This was my first taste of live theatre.

她的辩词是案发时她根本就不在现场。

Her defence was that she was somewhere completely different at the time of the crime.

少数几个旁观者站在现场观看。

A handful of onlookers stand in the field watching.

名哥伦比亚广播公司的摄影记者在现场拍摄并编辑录像报道。

Three CBS cameramen were on site to shoot and edit taped reports. 3

你是在现场看还是在电视上看？

Do you watch itliveatall or do you watch it on the box?

建筑工在现场干活时，让他额外做工的话工钱会便宜一些。

It is cheaper to have extra building work done when the builder is on site.