A Design of Key and Display Unit of Marine Automatic Identification System

介绍了利用单片机技术实现AIS的KDU软硬件设计方法,实现了本船信息的输入和来船信息的显示,经实机运行检验,该设计符合AIS系统的要求.This paper describes software and hardware design method of KDU of AIS by using single chip computer technology.Ownship's information input and other ship information display become true.Practice shows the KDU meets requirement of AIS system.福建省重点科技项目(2002H018

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^