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.
Aiming at great positioning error and “invagination” of boundary region by the method of weighted centroid algorithm, it is proposed in this paper that the algorithm named estimate based on virtual-derived points (EVD) would be applicable. By the method of analogous projection of unknown node, we can obtain the virtual-derived point in monitoring area, then we can treated the practical value of virtual-derived...