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Multichannel synthetic aperture radar (SAR)
in azimuth can resolve the contradiction between high resolution and wide swath
faced with traditional SAR imaging. However, channel errors will degrade the
performance of imaging. This paper compares the performances of four channel error
estimation algorithms under different clutter distributions and SNR conditions.
Further, explanations are given for performance differences of the four
algorithms, which provide evidence for method selection in engineering applications.
Mesoporous TiO2 ceramic films have been prepared upon the Ti alloy substrate by the micro-arc
oxidation (MAO) technology. To enhance the photo-catalytic property of the
films, Eu2O3 particles were added into the electrolyte
solution of Na2CO3/Na2SiO3.
Scanning electron microscope (SEM), energy dispersive (EDS), X-ray
photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) are employed to
characterize the modified films. Diffuse reflectance spectra (DRS) test,
photo-generated current test and photo decomposition test are applied to evaluate the
photo-catalytic property of the modified films. The results show that Eu2O3 transformed into one-dimensional (1-D) nano-wires embedded within the composite
film, and the film has high photo-catalytic property.