The ground application system of the FY-3 meteorological satellite,a new generation of polar-orbiting meteorological satellite designed and built independently by China has passed professional acceptance check in Beij...The ground application system of the FY-3 meteorological satellite,a new generation of polar-orbiting meteorological satellite designed and built independently by China has passed professional acceptance check in Beijing recently.The experts agreed unanimously that the ground application system of FY-3 meteorological satellite realized the timely acquisition of global data from morning and afternoon展开更多
To better improve the electrical safety of buildings and fulfill the role of lightning protection and grounding,this article combines cases and discusses seven aspects of lightning protection devices’construction tec...To better improve the electrical safety of buildings and fulfill the role of lightning protection and grounding,this article combines cases and discusses seven aspects of lightning protection devices’construction technology.These aspects include the lightning protection classification of buildings,air terminals,down conductors,grounding devices,division of lightning protection zones,and lightning electromagnetic pulse shielding.Through the introduction of this article,readers can gain a comprehensive understanding of the application and value of lightning protection grounding construction technology in building electrical installation projects.展开更多
文摘The ground application system of the FY-3 meteorological satellite,a new generation of polar-orbiting meteorological satellite designed and built independently by China has passed professional acceptance check in Beijing recently.The experts agreed unanimously that the ground application system of FY-3 meteorological satellite realized the timely acquisition of global data from morning and afternoon
文摘To better improve the electrical safety of buildings and fulfill the role of lightning protection and grounding,this article combines cases and discusses seven aspects of lightning protection devices’construction technology.These aspects include the lightning protection classification of buildings,air terminals,down conductors,grounding devices,division of lightning protection zones,and lightning electromagnetic pulse shielding.Through the introduction of this article,readers can gain a comprehensive understanding of the application and value of lightning protection grounding construction technology in building electrical installation projects.
文摘为了探究溧阳地区的光学厚度特性,本研究采用地基太阳分光光度计的实测数据对MODIS C6 AOD三种产品进行了精度检验,评估气溶胶产品在溧阳地区的适用性。先将地基观测数据进行插值,然后通过确定时间窗口和空间范围完成地基遥感观测数据与卫星气溶胶光学厚度数据间的匹配,研究显示深蓝算法(DB)整体反演精度略优于其他两种算法,其产品在该区域具有很好的适用性。其中,Terra卫星DB算法的线性相关性最好,相关系数可以达到0.87。因此,进一步选用2010—2019年的Terra DB AOD产品分析溧阳地区的近十年气溶胶光学厚度变化情况,发现溧阳气溶胶光学厚度的时间变化具有较为明显的季节性,夏季AOD值最高,而冬季AOD值最低,同时近十年溧阳地区的AOD值总体趋势变小。
