The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Ka-band communication is an important development direction of satellite communication, the rain fade has been the main factor which restricts the engineering application; rainfall spatial structure in the sea, the layered and convection rain cause great influence to the Ka-band satellite communication. The paper analyzes the reasons of rain fade, points out the electromagnetic wave absorption, thermal...
With the rapid growth and construction of information, the traditional voice-based static network has been gradually changed to dynamic network. By analyzing the current equipment situation and transmission services of metropolitan area network, some short comings which exist in the current transmission network come to conclusion. On the basis of the state-of-art transmission equipment, an efficient...
To solve the problem of satellite communication down without preventive alarm, a predict method based on data mining is proposed. By quantitative analysis of history data the monitor records, the tendency of parameter which has a high relationship with the communication quality could be predicted. Thus, the ability of early warning for satellite communication is promoted efficiently.
More and more attention is paid on the reliability of IP network as it becomes the current main business network. Especially for real-time communication, link fault may cause severe result. Thus, quick switch between master and slaver link is need. Using Network Quality Analyzer (NQA) technology, the network performance (such as response time, network jitter, packet loss rate and so on) can be detected...
Image cropping refers to removing unwanted areas from a photographic or illustrated image. The choice of the best picture window both at capture time and during subsequent processing is normally subjective and a wholly manual task. Effective cropping of images should not only use geometric constraints, but consider the image content as well. It is a challenging problem to cropping an image while taking...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.