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Laser communications appear to have potential advantage in the future global communication network. However, in the presence of atmospheric turbulence, the performance of satellite to ground links is degraded. Eventually, atmosphere causes fatal results such as the received optical power and signal to noise ratio (SNR) degradation and communication outage. In this paper, the research progress of laser...
Programmable logic device FPGA has characteristics of flexible design, high efficiency design, short development cycle and low cost. The power of FPGA is divided into static power and dynamic power. The static power is mainly decided by the temperature, it is easy to get power by building a simple model. But the dynamic power is decided by many kinds of design resources. This article focuses on XC4VSX55...
For existing defects of the events correlation analysis framework on the analysis ability or the scope of applications, this paper proposed a framework of audit events correlation analysis based on the influence net. The framework analyses the key events in audit data using influence net model, and proposes the algorithm of mining periodicity weighted temporal association rules to mine the correlation...
Advanced personalized e-applications require comprehensive knowledge about their user's preference in order to provide individual product recommendations and custom-tailored product offers. Much research has been conducted using Web logs to infer user preferences and predict users' behavior. However, little research measures the stability of user preferences over time. In this paper, the index named...
The power grid dynamics in North America is online detected by the North American power grid frequency monitoring network, and the measured frequency signals by frequency disturbance recorders (FDRs) contain the white noise and spikes that affect the analysis to those signals. In this paper, an interference model is built to depict the FDR frequency signals. Since those contaminated and complicated...
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