Supervised channel estimation in OFDM systems typically consists in the interpolation/smoothing over the entire time-frequency grid of the channel gains estimated on the pilot subcarriers. In this process, only statistical informations about the propagation channel are exploited (i.e., Doppler spectrum and power-delay profile). We propose a novel technique that is based on a general parametric ...

Flood, erosion, and sedimentation have become classic problems in the river. The two main parameters that significantly affect phenomenon of flood are flow sediment. Flood sediment transport cause aggradation degradation river bed, bring bad influence to construction environment. Therefore, it becomes important conduct manipulation control channel profile selected area Special Economic Area (KE...

Aquatic vegetation of different heights is widely scattered in natural rivers and conducive to their environmental function while affecting the flow hydrodynamic conditions. A semi-analytical velocity model constructed used study longitudinal profile open channel through double-layered rigid vegetation. The separated into three zones according profile: 1) nearly uniform distributed zone 1A lowe...

A systematic study of thermal silver ion exchange used for the fabrication of optical channel waveguides is reported in a single-alkali glass. The diffusion equilibrium and diffusion dynamics are experimentally studied, and the concentration-dependent diffusion coefficients are determined. The relationship between the fabrication conditions, i.e., time, temperature, and melt concentration, and ...

Voltage-gated ion channels (VGCs) mediate selective diffusion of ions across cell membranes to enable many vital cellular processes. Three-dimensional structure data are lacking for VGC proteins; hence, to better understand their function, there is a need to identify the conserved motifs using sequence analysis methods. In this study, we have used a profile-to-profile alignment method to identi...