针对IPv6协议接入空间通信网络的需求,重点讨论了邻居发现协议(NDP)在基于现场可编程门阵列(FPGA)的IPv6 over CCSDS-AOS网关上的实现。在IPv6 over CCSDS-AOS网关系统上搭建NDP协议模块,实现网关地址解析;通过状态机控制实现NDP协议模...针对IPv6协议接入空间通信网络的需求,重点讨论了邻居发现协议(NDP)在基于现场可编程门阵列(FPGA)的IPv6 over CCSDS-AOS网关上的实现。在IPv6 over CCSDS-AOS网关系统上搭建NDP协议模块,实现网关地址解析;通过状态机控制实现NDP协议模块功能。实验表明,该设计解决了IPv6 over CCSDS-AOS网关主动和被动地址解析以及邻居缓存表查找和管理问题,不需要网关对NDP进行协议转换和转发。目前已在IPv6 over CCSDS-AOS网关中应用。展开更多
A NH_(3) gas sensor based on a ZnO nanorod array is fabricated by hydrothermal decomposition on a Au electrode.The as-grown ZnO nanorods have uniform diameter distribution and good crystal structure,shown by scanning ...A NH_(3) gas sensor based on a ZnO nanorod array is fabricated by hydrothermal decomposition on a Au electrode.The as-grown ZnO nanorods have uniform diameter distribution and good crystal structure,shown by scanning electron microscopy,x-ray diffraction,high resolution transmission electron microscopy and photoluminescence emission characterizations.The gas sensing results show that the ZnO nanorod-based device responds well to ammonia gas at room temperature(sensitivity𝑆is about 8).展开更多
The gas sensing properties of the single-walled carbon nanotube networked field-effect transistors for NO_(2) are investigated.After the modification of the gold contact electrodes of the carbon nanotube transistors w...The gas sensing properties of the single-walled carbon nanotube networked field-effect transistors for NO_(2) are investigated.After the modification of the gold contact electrodes of the carbon nanotube transistors with the thiolated heme,the NO_(2) sensing results indicate that the sensing sensitivity of the modified transistors is enhanced greatly and the sensing limit can reach below 100 ppb.It is also proposed that the mechanism of the sensitivity enhancement for NO_(2) detection mainly results from the modulation of the Schottky energy barrier at the Au/CNTs junction upon thiolated heme facilitated NO_(2) adsorption.展开更多
文摘针对IPv6协议接入空间通信网络的需求,重点讨论了邻居发现协议(NDP)在基于现场可编程门阵列(FPGA)的IPv6 over CCSDS-AOS网关上的实现。在IPv6 over CCSDS-AOS网关系统上搭建NDP协议模块,实现网关地址解析;通过状态机控制实现NDP协议模块功能。实验表明,该设计解决了IPv6 over CCSDS-AOS网关主动和被动地址解析以及邻居缓存表查找和管理问题,不需要网关对NDP进行协议转换和转发。目前已在IPv6 over CCSDS-AOS网关中应用。
基金by the National Basic Research Program of China under Grant No 2009CB930601the National Natural Science Foundation of China(50902071,61076067,20974046)+2 种基金the Natural Science Research Project of Jiangsu Ordinary University(09KJB430008)the Open Research Fund of State Key Laboratory of Bioelectronics,Southeast University(BJ209007)the Science Foundation of Nanjing University of Posts and Telecommunications(NY208058).
文摘A NH_(3) gas sensor based on a ZnO nanorod array is fabricated by hydrothermal decomposition on a Au electrode.The as-grown ZnO nanorods have uniform diameter distribution and good crystal structure,shown by scanning electron microscopy,x-ray diffraction,high resolution transmission electron microscopy and photoluminescence emission characterizations.The gas sensing results show that the ZnO nanorod-based device responds well to ammonia gas at room temperature(sensitivity𝑆is about 8).
基金Supported by the National Basic Research Program of China under Grant No 2009CB930601the National Natural Science Foundation of China under Grant Nos 50902071,61076067 and 20974046+2 种基金the Natural Science Research Project of Jiangsu Ordinary University(09KJB430008)the Open Research Fund of State Key Laboratory of Bioelectronics,Southeast University(BJ209007)the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructures(SKL201111SIC).
文摘The gas sensing properties of the single-walled carbon nanotube networked field-effect transistors for NO_(2) are investigated.After the modification of the gold contact electrodes of the carbon nanotube transistors with the thiolated heme,the NO_(2) sensing results indicate that the sensing sensitivity of the modified transistors is enhanced greatly and the sensing limit can reach below 100 ppb.It is also proposed that the mechanism of the sensitivity enhancement for NO_(2) detection mainly results from the modulation of the Schottky energy barrier at the Au/CNTs junction upon thiolated heme facilitated NO_(2) adsorption.
