We study the dynamics of an isolated spike of Stereo Systems radiation in superradiant regime.We show that conditions exist where the pulse moves with a group velocity larger than the velocity of light in vacuum and is followed by a pedestal resulting from a complex postsaturation dynamics.The tail is constituted by a train of subpulses with both t
In the last decades, the visual navigation system has been investigated by many researchers as an aided navigation system for Inertial Navigation System (INS) in the Unmanned Aerial Vehicles (UAV).In this research, for improving the INS errors a new approach based on feature tracking algorithm is used.In this approach, FLATS in order to estimate th
The current demographic situation in both developed and developing countries is characterized by an aging population.From an economic perspective, this phenomenon holds practical significance for studying anticipated changes in the structure of state budget revenues and expenditures, as well as alterations in the overall consumption of goods and se
Wind speed and direction are important parameters in meteorological observation.A solid wind sensor is needed with a small quadcopter for boundary layer meteorological observation.In this paper, the principle of a cylindrical two-dimensional wind sensor is reported and the data from wind tunnel experiments are analyzed.A model is proposed to descri
Abstract IP geolocation determines geographical location by the IP address of Internet hosts.IP geolocation is widely used by target advertising, online fraud detection, cyber-attacks attribution and so on.It has gained much more attentions in these years since more and more physical devices are connected to cyberspace.Most geolocation methods cann