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.
For the recognition of different similar airplane targets, a set of wavelet moment invariants are applied based on the invariant moment theory and wavelet analysis, and a feature selection algorithm based on the DB Index guidelines is presented in order to get a locally optimum feature set. The experimental results prove that this algorithm is superior to Hu's moment invariants and Zernike's moment...
As segmenting the images containing the aircraft target, in order to clearly separate the target from the background, Segmentation Algorithm of Improved Adaptative Threshold Region Images has been put forth in this paper. Using the automatic threshold segmentation of images for many times, the part of Higher Grey Value in the images has constantly been stretching, contrast ratio has been enhanced,...
MLAT (Multilateration) in the civil aviation is a typical sensor network which locates the positions of aircrafts by the TDOAs (Time Difference of Arrivals) of signal from the aircraft to the different remote stations. It is important for MLAT to ensure the clock synchronization. On the basis of CHAN algorithm, this paper proposes an improvement based on TDOA adjustment. In this method, a reference...
In this paper, flight faults are generated and visual aircraft instruments are created as well as real-time information communication between simulation flight data and virtual instruments is established. Particularly, dynamical faults generation and its corresponding display system are developed and simulated in detail. Finally, the system is validated for authenticity and reliability by taking the...
This paper is focused on the development of an effective method to optimization inversion on constitutive model parameters of bird material in the numerical simulation of bird impact on an aircraft windshield. The experiments of bird impact on a plate under the velocity of 170m/s were performed and the displacements as well as the strains of the plate were measured. The Murnaghan Equation of State...
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.