3-ethyl-5-(2-(3-ethyl-2-benzothiazolinylidene) ethyl (-idene)) rhodanine is a kind of promising photoelectric material for manufacturing organic solar cell. But its absorption spectrum is rather narrow. The phenomenon...3-ethyl-5-(2-(3-ethyl-2-benzothiazolinylidene) ethyl (-idene)) rhodanine is a kind of promising photoelectric material for manufacturing organic solar cell. But its absorption spectrum is rather narrow. The phenomenon that the absorption spectrum of its thin film is a little wider than that of the solution was observed by B. L. Morel.展开更多
As the 2025 G20 presidency,South Africa hosted the G20 Foreign Ministers’Meeting in Johannesburg on 20-21 February,which will convene foreign ministers of G20 members such as Chinese Foreign Minister Wang Yi.This is ...As the 2025 G20 presidency,South Africa hosted the G20 Foreign Ministers’Meeting in Johannesburg on 20-21 February,which will convene foreign ministers of G20 members such as Chinese Foreign Minister Wang Yi.This is an important event before the G20 Johannesburg Summit in November.展开更多
介绍了iDEN(integrated Digital Enhanced Network)专网的VSELP语音压缩编码、M-16QAM调制等关键技术特点以及集群调度、数据传输等主要功能,并结合现代物流信息系统的实际需求特性,进行基于iDEN专网的现代物流信息系统总体架构与系统...介绍了iDEN(integrated Digital Enhanced Network)专网的VSELP语音压缩编码、M-16QAM调制等关键技术特点以及集群调度、数据传输等主要功能,并结合现代物流信息系统的实际需求特性,进行基于iDEN专网的现代物流信息系统总体架构与系统功能设计,进而对各子系统具体功能做出详细分解。综合运用基于iDEN的车辆定位、图像监控等技术实现各子系统的主要功能。最后对iDEN专网在深圳市现代物流子系统中的应用情况进行了介绍。展开更多
文摘3-ethyl-5-(2-(3-ethyl-2-benzothiazolinylidene) ethyl (-idene)) rhodanine is a kind of promising photoelectric material for manufacturing organic solar cell. But its absorption spectrum is rather narrow. The phenomenon that the absorption spectrum of its thin film is a little wider than that of the solution was observed by B. L. Morel.
文摘As the 2025 G20 presidency,South Africa hosted the G20 Foreign Ministers’Meeting in Johannesburg on 20-21 February,which will convene foreign ministers of G20 members such as Chinese Foreign Minister Wang Yi.This is an important event before the G20 Johannesburg Summit in November.
文摘介绍了iDEN(integrated Digital Enhanced Network)专网的VSELP语音压缩编码、M-16QAM调制等关键技术特点以及集群调度、数据传输等主要功能,并结合现代物流信息系统的实际需求特性,进行基于iDEN专网的现代物流信息系统总体架构与系统功能设计,进而对各子系统具体功能做出详细分解。综合运用基于iDEN的车辆定位、图像监控等技术实现各子系统的主要功能。最后对iDEN专网在深圳市现代物流子系统中的应用情况进行了介绍。
文摘集群通信系统诞生于20世纪70年代，最早的集群通信是模拟系统，数字集群技术于20世纪90年代中期在全球范围内兴起，90年代末期在中国出现数字集群网络。信息产业部于2000年12月28日发布了我国《数字集群移动通信系统体制》（SJ T11228-2000）标准，这是一项电子行业推荐性的部颁标准，在该标准中确定了TETRA系统和iDEN系统两种体制。其中iDEN（Integrated digital enhanced network）是美国标准，代表厂商是摩托罗拉，主要适用于共用集群通信网。
