In this paper, photoinduced electron transfer(PET) phosphoroionophore, N-(1-bromo- 2-naphthylmethyl)-diethanolamine (BND) was synthesized and its phosphorescent characteristics were studied. The experimental results ...In this paper, photoinduced electron transfer(PET) phosphoroionophore, N-(1-bromo- 2-naphthylmethyl)-diethanolamine (BND) was synthesized and its phosphorescent characteristics were studied. The experimental results showed that strong phosphorescence could be observed in b-cyclodextrin aqueous solution only at low pH value. This system combined AND and NOT function to produce a three-input inhibit (INH) logic gate.展开更多
介绍一种基于非接触式IC卡——射频卡的考勤系统,通过对各种识别技术的比较,选择目前比较成熟的技术——射频识别技术,开发了本套集门禁控制、考勤为一体的系统。此系统在Windows 2000平台上,采用客户端/服务器模式,一方面实现了对非持...介绍一种基于非接触式IC卡——射频卡的考勤系统,通过对各种识别技术的比较,选择目前比较成熟的技术——射频识别技术,开发了本套集门禁控制、考勤为一体的系统。此系统在Windows 2000平台上,采用客户端/服务器模式,一方面实现了对非持卡者的门禁限制,另一方面完成了对持卡员工的考勤。项目结合TI远距离电子标签读写器及高功率天线给出了系统的总体结构,并对主要组成部分的功能及具体实现做了详细论述,最后完成以Visual C++ 6.0为开发平台,利用串口通信和Access数据库实现的可视化控制管理软件。展开更多
文摘In this paper, photoinduced electron transfer(PET) phosphoroionophore, N-(1-bromo- 2-naphthylmethyl)-diethanolamine (BND) was synthesized and its phosphorescent characteristics were studied. The experimental results showed that strong phosphorescence could be observed in b-cyclodextrin aqueous solution only at low pH value. This system combined AND and NOT function to produce a three-input inhibit (INH) logic gate.
文摘介绍一种基于非接触式IC卡——射频卡的考勤系统,通过对各种识别技术的比较,选择目前比较成熟的技术——射频识别技术,开发了本套集门禁控制、考勤为一体的系统。此系统在Windows 2000平台上,采用客户端/服务器模式,一方面实现了对非持卡者的门禁限制,另一方面完成了对持卡员工的考勤。项目结合TI远距离电子标签读写器及高功率天线给出了系统的总体结构,并对主要组成部分的功能及具体实现做了详细论述,最后完成以Visual C++ 6.0为开发平台,利用串口通信和Access数据库实现的可视化控制管理软件。