There can only ever have been, or that will continue to be one infinite visible physical condition has endured, and endure eternally. The physicists’ contention matter invisible dark empty space somehow managed coexist at the same time after supposedly finite big bang explosive commencement of universe billions light years ago is utterly invalid. no between stars planets. merely a contrast in a...

a novel zr,ce-tio2/sio2 nanocomposite thin film was successfully prepared with various amounts of zr4+ and ce4+ as codopant ions for self-cleaning applications. a thin film was coated on a tile substrate by dip-coating and porous zr,ce-tio2/sio2 was obtained after heat treatment for 2 hours at 500 °c. the sem images and xrd pattern showed that the optimum amount of doping ions in relation to ti...

The detection probability of visible light reconnaissance equipment is one of key indexes to assess the performance of the system. The detection probability is determined by many factors, such as atmospheric visibility, target-background contrast, target size and distance, solar elevation angle etc. Based on the detection probability model of the visible light reconnaissance equipment to gain t...