短消息服务业务(SMS)作为GMS(Global Mobile System)网络的一种基本业务,已得到越来越多的系统运营商和系统开发商的重视,基于这种业务的各种应用也蓬勃发展起来。简要分析了短消息服务在煤矿企业安全生产中涉及到多种信息(瓦斯监测、...短消息服务业务(SMS)作为GMS(Global Mobile System)网络的一种基本业务,已得到越来越多的系统运营商和系统开发商的重视,基于这种业务的各种应用也蓬勃发展起来。简要分析了短消息服务在煤矿企业安全生产中涉及到多种信息(瓦斯监测、综合调度、会议通知等)技术和应用,给出了用于短消息通信的常用AT命令,提出了基于GMS/SMS用于多种场合的短信息平台的设计思路和设计方案,并对如何用VB实现这种平台应用作了简单介绍。展开更多
By using Gaines and Mawhin’s continuation theorem of coincidence degree theory and constructing Lyapunov functionals,a set of easily verifiable sufficient conditions are derived for the existence and global attractiv...By using Gaines and Mawhin’s continuation theorem of coincidence degree theory and constructing Lyapunov functionals,a set of easily verifiable sufficient conditions are derived for the existence and global attractivity of a positive periodic solution to a predator-prey system with delays and impulses.展开更多
文摘短消息服务业务(SMS)作为GMS(Global Mobile System)网络的一种基本业务,已得到越来越多的系统运营商和系统开发商的重视,基于这种业务的各种应用也蓬勃发展起来。简要分析了短消息服务在煤矿企业安全生产中涉及到多种信息(瓦斯监测、综合调度、会议通知等)技术和应用,给出了用于短消息通信的常用AT命令,提出了基于GMS/SMS用于多种场合的短信息平台的设计思路和设计方案,并对如何用VB实现这种平台应用作了简单介绍。
基金This work was supported by the National Natural Sciences Foundation of China (10361006)the Natural Sciences Foundation of Yunnan Province (2003A0001M).
文摘By using Gaines and Mawhin’s continuation theorem of coincidence degree theory and constructing Lyapunov functionals,a set of easily verifiable sufficient conditions are derived for the existence and global attractivity of a positive periodic solution to a predator-prey system with delays and impulses.