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Aiming at the difficulty of choosing filtering parameters of Non-Local Means (NLM) denoising algorithm for Cone-Beam Computed Tomography (CBCT) projection images, an adaptive NLM denoising algorithm is proposed. First, a simplified noise estimation method based on sub-block division is proposed to replace the approach of designating the background region,(More)
:Tap water is one of the most commonly used water resources in our daily life, where 10 the pathogenic bacteria, such as Staphylococcus aureus and Escherichia coli may pose a potential 11 health risk to humans. Furthermore, the mutualism of different pathogenic bacteria in actual tap 12 water may diminish the antibacterial effect of antibacterial agents.(More)
With the rapid development of civil aviation, air traffic management system plays a more important role in ensuring aviation safety, and hence there is an urgent need to use information technology to improve analysis level and efficiency of aviation safety information. In this paper, an air traffic management safety database analysis system is developed. It(More)
The improved algorithm selects expected locations (for adding navigation links) in backtracks set at the point of the earlier and the less backtracks, which avoids effectively negative impact to the accuracy of the overall analysis by the long access sequence. The experimental results show that the improved algorithm can find expected pages effectively,(More)
A modeling framework was proposed to investigate the impact of trans-boundary air pollutant transport on regional air quality. This was based on a combination of the HYSPLIT trajectory model, the CAMx air quality model, and the MM5 meteorological model. The examination of atmospheric PM 10 pollution in Guangzhou within the Pearl River Delta (PRD) region of(More)