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The Shuttle Radar Topography Mission (SRTM) digital elevation model (DEM) is one of the most complete and frequently used global-scale DEM products in various applications. However, previous studies have shown that the SRTM DEM is systematically higher than the actual land surface in vegetated mountain areas. The objective of this study is to propose a(More)
As a large carbon pool, global forest ecosystems are a critical component of the global carbon cycle. Accurate estimations of global forest aboveground biomass (AGB) can improve the understanding of global carbon dynamics and help to quantify anthropogenic carbon emissions. Light detection and ranging (LiDAR) techniques have been proven that can accurately(More)
As the well known port for DNS service, the 53 port won't be shielded by most of firewalls or network services. This defect can be used to send packets through firewalls without being detected. For comprehensive understanding of this phenomenon, a program was designed to inspect UDP flows going through the port 53. With the help of this program, we(More)
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