排序方式: 共有29条查询结果,搜索用时 15 毫秒
1.
Absorption coefficients of phytoplankton, colored detrital matter (CDM), non-algal particles (NAP), colored dissolved organic matter (CDOM), and their relative contributions to total non-water absorption (at ? w) are essential variables for bio-optical and radiative transfer models. Light absorption properties showed large range and variability sampled at 194 stations throughout Lake Chaohu between May 2013 and April 2015. The at ? w was dominated by phytoplankton absorption (aph) and NAP absorption (ad). The contribution of CDOM absorption to at ? w was lower than 30%. Phytoplankton and NAP were the primary sources of spatial and vertical variability in absorption properties. Light absorption by CDOM, though significant in magnitude, was relatively constant. CDM absorption (adg) was dominated by NAP. The spatial variation of the absorption coefficients from each of the optically active constituents were driven by several main inflow rivers in the western and middle part of Lake Chaohu. Algal blooms and bottom resuspension contributed to vertical variability as observed by phytoplankton and NAP profiles. Specific absorption of phytoplankton had significant spatial and seasonal variations without vertical variation. The spectral slope of absorption showed no significant spatial variability (p > 0.05). Variations of absorption affected different ranges of remote sensing reflectance (Rrs) spectrum, thereby increasing the difficulty of applying the remote sensing algorithm in optically complex waters. Parameters and relationships presented in this study provide useful information for bio-optical models and remote sensing of lakes similar to Lake Chaohu in terms of optical properties. 相似文献
2.
随着海外互联网市场的不断拓展,中国电信、中国联通等运营商,通过自建海外IP网络、与国际运营商网络互联互通等方式不断扩大网络全球覆盖、提升网络可达范围、引入更丰富互联网资源。从国际互联网互联互通架构与模式等出发,基于国内运营商的国际互联网互联互通建设及运营过程中的互联方寻找、互联互通需求评估、模式选择、互联互通落地及优化、互联互通结算等方面视角,研究了国际互联网互联互通解决方案,并提供了可供参考的互联互通部署建议。 相似文献
3.
介绍了我国互联网网间互联的概况,从结算、技术、监管等几个角度分析了我国互联网互联互通中存在的问题,并对问题的解决进行了探讨和建议。 相似文献
4.
对NAP的历史及现状作了介绍,对建设国家互联网络广州交换中心(NAP)的背景及必要性作了阐述,并对NAP系统体系结构、IP地址、域名规划和NAP网络管理等技术方案作了详细的说明,并指出NAP可以提供的其他附加服务。 相似文献
5.
网络访问控制技术及其应用分析 总被引:3,自引:1,他引:2
从工程应用的角度对网络访问控制(NAC)技术进行总结和分析,对802.1x,TNC,NAP进行了技术框架总结。基于开放性、兼容性、适应性,对以上技术的工程应用进行了分析。802.1x、网关、防火墙、虚拟专用网(VPN)等4种策略执行技术的选择和实现是NAC系统设计的关键。最后总结了NAC选型和设计需要重点关注的内容。 相似文献
6.
7.
蓝牙以太封装技术(BEE)用于实现网络层到蓝牙设备L2CAP层的协议映射,它为蓝牙个域网(PAN)的实现提供新的解决方案。文章将详细讨论BEE的实现以及如何在BEE的基础上,构建网络接入点和组建蓝牙PAN,并以实际测试的统计数据,说明BEE的优越性。 相似文献
8.
Bluetooth PAN控制机制及其实现 总被引:3,自引:0,他引:3
通过对 Bluetooth PAN的自组织网络 SON( Piconet&Scatternet)和网络访问点 NAP( Networking AccessPoint)两种模式的控制机制进行分析和研究 ,给出了 Bluetooth PAN的一种实现结构。Bluetooth PAN是 Bluetooth技术的一种重要应用 ,有着极为广泛的应用领域 相似文献
9.
10.