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In this paper, a algorithm of airborne SAR Direct Geocoding based on correction of airborne SAR systematic error including slant range measurement error and time delay is put forward to improve the positioning precise, and POS/PPP technique is used to obtain radar phase center position data taking into account work efficiency. Many factors result in airborne SAR positioning accuracy, but main of them...
A new signal constellation rearrangement for HARQ method is presented in this paper, where symbol-combining mappings are used for retransmission and at the receiver, the symbol combination is implemented before demodulation, and then the combined signal is demodulated with a new constellation. The new constellation has the larger minimum Euclidean distance and the complexity is reduced for its less...
As a crucial step in content-based video retrieval, shot boundary detection has attracted much more research interesting in recent years, but many of the algorithms proposed in the literatures are not robust to mosaic, flash lamp and motion of camera and object. A novel shot boundary detection algorithm based on information theory is presented in this paper. It can detect cut and gradual shot simultaneously...
Whereas grids enable the sharing, selection, query and aggregation of geographically distributed resources for solving large-scale problems, providing efficient resource allocation mechanism managing Grid resources is a complex undertaking. In this work, we have investigated several famous schedule methods proposed by Nimrod-G, a famous computational economy framework for regulating the supply and...
Desirable goals for grid task scheduling algorithms would shorten average delay, maximize system utilization and fulfill user constraints. In this work, an agent-based grid management infrastructure coupled with mean field annealing (MFA) scheduling algorithm has been proposed. An agent in grid utilizes a neural network algorithm to manage and schedule tasks. The Hopfield neural network is good at...
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