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.
Dynamic echo is the basis to analyze and discriminate the features of precession targets, but it is difficult to acquire the outfield data with small cost. In this paper, precession model of a general target is built, and the attitude formulas of elevation and azimuth are derived respectively. On the basis of the static electromagnetic scattering data, a scheme is proposed to simulate the dynamic...
By method of study in aerodynamic noise, a model of car and protective barrier road in air field was built in this paper. The distributed of fluid and acoustic in aside of protective barrier road was solved by Fluent software. The result of analysis showed that velocities, pressures and noise are all distributed as alternating strong and weak near the protective barrier. And when the speeds of car...
The characteristics of relativistic electrons generated in short-pulse laser plasma interactions are important for evaluating the success of the fast ignition concept. The important parameters include the spectrum, laser to electron conversion efficiency, and divergence angle of the electrons at the interface. Simulation results using 3-D particle-in-cell (PIC) techniques in fast ignition geometries...
For flight simulators, field of view is restricted by off-axial display in collimated display system. Especially, edge imaging quality is greatly reduced due to forward movement of eye point. This paper aims to perform three-dimensional ray tracing in the whole field of view and, apply aberration theory for optimization so as to acquire abnormity back projection screen. Evaluated by root mean square...
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.