排序方式: 共有6条查询结果,搜索用时 0 毫秒
1
1.
2.
R. J. Delmas 《Journal of Atmospheric Chemistry》1992,14(1-4):261-271
10Be is used as a spike of the natural background atmospheric aerosol to calculate the global flux of sulfur (FS) into the free troposphere. The sulfate and10Be concentrations determined in polar snow are compared. On the basis of an annual10Be production rate of 1.21 106 at.cm-2, a very low figure of 2.9 Tg S a-1 is calculated for FS, which suggests that most of the sulfur emitted at ground level remains in the boundary layer. The role of OCS in the upper tropospheric sulfur budget is reviewed. It is also shown that cataclysmic volcanic eruptions may disturb considerably for 1–2 years this vast background tropospheric sulfur reservoir. 相似文献
3.
A novel cryogenic sampling method combining the matrix isolation technique with FTIR spectroscopy has been developed for atmospheric trace gas analysis. It is applicable to a wide range of molecules with detection limits typically in the 10–50 ppt range. The method is described along with some measurements of N2O, CFCl3, CF2Cl2, OCS, CS2, SO2 and PAN from samples collected at ground level and from an aircraft between 9 and 14 km. 相似文献
4.
观测控制系统是当前的一个研究热点,底层通信是观测控制系统架构的一个重要环节。但传统的观测控制系统一般采用裸套接技术实现,缺少统一的传输控制机制,在密集数据通信时经常存在延迟,影响实时控制的需要;同时缺少广播与组播机制,限制了观测控制系统的设计。针对观测控制系统的要求,研究了基于ZeroMQ不同通信模型及对应的天文控制模式,分析了不同的通信控制架构的可用性,在此基础上通过实验对相应的通信模型进行测试,验证其在天文仪器分布控制中的可用性。测试结果进一步说明,ZeroMQ构建观测控制系统的底层通信架构是可行的,能够满足观测控制系统对设备的各种控制需求。 相似文献
5.
光突发交换是光通信领域中的前沿和热点技术,以光突发交换的产生揭示了其演进历史,详细介绍了光突发交换的主要思想,并对光突发交换和光电路、分组交换进行了比较,最后简略介绍了当前关键技术的研究情况。 相似文献
6.
1