This paper reports the results of the absorption spectral analysis of Ulothrix sp. attached to the rocks from the intertidal zone in front of Great Wall Station,Antarctica in February 1989,and the benthic diatoms grow...This paper reports the results of the absorption spectral analysis of Ulothrix sp. attached to the rocks from the intertidal zone in front of Great Wall Station,Antarctica in February 1989,and the benthic diatoms growing on small stones and on the edge of swamps of that zone.Six kinds of pigments were separated and identified in benthic diatoms.They are carotene, chlorophyll-a, fucoxanthin, chlorophyin, neoxanthin and chlorophyll-c. Nine kinds of pigments were identified in Ulothrix sp.. They are carotinoid, pheophytin, chlorophyll-a, -b, chlorophyllin, chlorophyllide-a, neoxanthin, chlorophyll-c and pheophytin-c. The intertidal benthic diatoms and Ulothrix sp. have specific absorption spectra and there are also marked differences in the composition of algal pigments they contain. Since the pigments of marine algae show differences in their absorption spectra, the absorption spectrum can be used to identify the species of marine algae.展开更多
在线监测技术可以实现对架空输电线路本体、通道环境、气象条件、风偏舞动等的实时监测,有效保障了架空输电线路安全稳定运行水平,但是部分杆塔处于无运营商基站覆盖区域,无法实现在线监测数据回传。为此,提出了一种基于非授权频谱终端...在线监测技术可以实现对架空输电线路本体、通道环境、气象条件、风偏舞动等的实时监测,有效保障了架空输电线路安全稳定运行水平,但是部分杆塔处于无运营商基站覆盖区域,无法实现在线监测数据回传。为此,提出了一种基于非授权频谱终端直接通信技术(Device to Device,D2D)的无信号区在线监测数据传输方法。首先,分析架空输电线路在线监测装置分布特点,选择适用于输电线路环境的频谱资源,建立装置间直接通信的路损模型;然后,采用基于先听后发的信道接入机制,实现与已有通信技术的友好共存;最后,结合无信号区输电线路信道环境,采用基于定向天线的传输路由进行信息中继。对本技术的仿真验证结果显示本方法可以在降低天线的传输功率、提高整个监测网络的生存时间和稳定工作时间基础上,保障在线监测数据高速率可靠回传。展开更多
文摘This paper reports the results of the absorption spectral analysis of Ulothrix sp. attached to the rocks from the intertidal zone in front of Great Wall Station,Antarctica in February 1989,and the benthic diatoms growing on small stones and on the edge of swamps of that zone.Six kinds of pigments were separated and identified in benthic diatoms.They are carotene, chlorophyll-a, fucoxanthin, chlorophyin, neoxanthin and chlorophyll-c. Nine kinds of pigments were identified in Ulothrix sp.. They are carotinoid, pheophytin, chlorophyll-a, -b, chlorophyllin, chlorophyllide-a, neoxanthin, chlorophyll-c and pheophytin-c. The intertidal benthic diatoms and Ulothrix sp. have specific absorption spectra and there are also marked differences in the composition of algal pigments they contain. Since the pigments of marine algae show differences in their absorption spectra, the absorption spectrum can be used to identify the species of marine algae.
文摘在线监测技术可以实现对架空输电线路本体、通道环境、气象条件、风偏舞动等的实时监测,有效保障了架空输电线路安全稳定运行水平,但是部分杆塔处于无运营商基站覆盖区域,无法实现在线监测数据回传。为此,提出了一种基于非授权频谱终端直接通信技术(Device to Device,D2D)的无信号区在线监测数据传输方法。首先,分析架空输电线路在线监测装置分布特点,选择适用于输电线路环境的频谱资源,建立装置间直接通信的路损模型;然后,采用基于先听后发的信道接入机制,实现与已有通信技术的友好共存;最后,结合无信号区输电线路信道环境,采用基于定向天线的传输路由进行信息中继。对本技术的仿真验证结果显示本方法可以在降低天线的传输功率、提高整个监测网络的生存时间和稳定工作时间基础上,保障在线监测数据高速率可靠回传。
