As I got closer to the polling station the police and army were manning the entrance, and were supported by young volunteers who were there to maintain order and ensure that everything ran smoothly. 当我走进投票站时,警察和军人在守卫着入口,同时有年轻的志愿者在协助维护秩序,确保所有事情的顺利进行。
MODBUS protocol based on ASCII mode was adopted in Oil Transferring Station System, The communication between PLC and STC-1 was realized with polling STC-1 data in order. 转油站监控系统采用ASCII模式的MODBUS协议,按顺序查询STC-1数据,完成PLC与STC-1通信。
These two schemes compute weight of each node to determine the polling order on the basis of polling success rate, vacant rate and packet proportion of last polling period, vacant rate of last polling period respectively. 两种方案分别利用轮询成功率、空闲率和上一轮接收分组比例、空闲率计算各结点权值,作为确定轮询顺序的依据。