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Purpose
The purpose was to explore the value of liver fibrosis scores (fibrosis‐4, BAAT score and BARD score) for incidence risk of stroke in a cohort study.
Methods
A total of 9088 participants without stroke history enrolled the follow‐up. Three liver fibrosis scores (LFSs) including FIB‐4, BARD score and BAAT score were adopted. The end point was stroke. Cox regression analysis was used to calculate...
The characteristics of underwater acoustic channel is strong multipath, severe Doppler and limited bandwidth. OFDM modulation has good ability in anti multipath and Turbo Product Codes(TPC) has excellent performance in a high code rate, We make full use of their advantages and designed an OFDM underwater acoustic communication system based on TPC. Using the BELLHOP simulation model to get the approximate...
Underwater acoustic communication networks have gained more and more attention in recent years due to their good prospects in the application of environmental monitoring, underwater surveillance, disaster forecasting, and so on. A sea trial of an underwater acoustic communication network, with up to 10 nodes, was carried out near Shengsi in the East China Sea, in June 2015. The trial was designed...
In recent years, whether autonomous monitoring of ocean environment, deep seabed resources surveying, underwater sensor networks, or military underwater detection networks, etc, there are widespread needs of underwater acoustic networks (UANs). This paper provides a brief overview of the characteristics and advances of UANs, and the main research contents and key technologies of UANs are analyzed,...
The Pseudo Random Noise(PRN) signal has a wide application in active sonar detection, because it has good doppler and range resolution. Aimed at traditional matched filter processing of a PRN signal, there is a need for multiple copy signals, because the PRN signal is sensitive to doppler frequency shift. A new detector based on Fractional Correlation is proposed in this paper. As a generalized form...
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