高比例的可再生能源接入、电力市场化改革和"互联网+"智慧能源的快速发展需要大量的数据支撑,并实现物理、商业、信息的广泛互联、智能互动。关键步骤之一是建立泛在电力物联网(Ubiquitous Power Internet of Things,UPIoT),...高比例的可再生能源接入、电力市场化改革和"互联网+"智慧能源的快速发展需要大量的数据支撑,并实现物理、商业、信息的广泛互联、智能互动。关键步骤之一是建立泛在电力物联网(Ubiquitous Power Internet of Things,UPIoT),实现电力系统中人与物、物与物、人与人之间随时随地通信。首先介绍了UPIoT的发展背景与基本概念、主要的低功耗广域网络(Low Power Wide Area Network, LPWAN)技术,然后以LoRa物联网解决方案为例介绍了基于LPWAN的UPIoT的体系架构及性能。最后探讨了UPIoT的应用前景,并指出了UPIoT需重点研究和解决的两个特殊问题,即:低压电力线载波通信(PLC)和强电磁干扰环境下的信号处理。展开更多
The reaction process of nanometer ZnO preparation through basic zinc carbonate calcination was investigate d via TG-DTG-DTA,IR,XRD and TEM methods.The spectra features and morphology variations of precursor and target...The reaction process of nanometer ZnO preparation through basic zinc carbonate calcination was investigate d via TG-DTG-DTA,IR,XRD and TEM methods.The spectra features and morphology variations of precursor and target products calcinated at diffe rent temperatures were investigate d.The reaction process was deduced t o be three stages,which include breaking of pr ecursor crystallites,their decomp osition,and growth of ZnO crystal nu cleus.The most appropriate temperature fo r this reaction was demonstrated to b e about 300℃.展开更多
文摘高比例的可再生能源接入、电力市场化改革和"互联网+"智慧能源的快速发展需要大量的数据支撑,并实现物理、商业、信息的广泛互联、智能互动。关键步骤之一是建立泛在电力物联网(Ubiquitous Power Internet of Things,UPIoT),实现电力系统中人与物、物与物、人与人之间随时随地通信。首先介绍了UPIoT的发展背景与基本概念、主要的低功耗广域网络(Low Power Wide Area Network, LPWAN)技术,然后以LoRa物联网解决方案为例介绍了基于LPWAN的UPIoT的体系架构及性能。最后探讨了UPIoT的应用前景,并指出了UPIoT需重点研究和解决的两个特殊问题,即:低压电力线载波通信(PLC)和强电磁干扰环境下的信号处理。
文摘The reaction process of nanometer ZnO preparation through basic zinc carbonate calcination was investigate d via TG-DTG-DTA,IR,XRD and TEM methods.The spectra features and morphology variations of precursor and target products calcinated at diffe rent temperatures were investigate d.The reaction process was deduced t o be three stages,which include breaking of pr ecursor crystallites,their decomp osition,and growth of ZnO crystal nu cleus.The most appropriate temperature fo r this reaction was demonstrated to b e about 300℃.
