The codebook design is the most essential core technique in constrained feedback massive multi-input multi-output (MIMO) system communications. MIMO vectors have been generally isotropic or evenly distributed traditional designs. In this paper, Gaussian mixture model (GMM) based clustering proposed, which inspired by strong classification and analytical abilities of techniques. Huge quantities ...

Abstract Cover crops are increasingly being included in crop rotations as a mechanism to promote diversity and provide agroecosystem services, including weed suppression. Recently, cover mixtures have increased popularity an attempt greater ecological services compared with monocultures. Several recent studies, however, failed detect positive effect of on biomass production or Here we assessed ...

effect of dietary mixture of prebiotic mannan oligosaccharide (mos) and β-1,3glucan, on growth performance, survival and body composition in grass carp juvenile (ctenopharyngodon idella) were investigated for 56 days. practical diets were supplemented with 0, 0.5, 1.5, 2.5 and 3.5 g/kg mixture of mos and β-1,3glucan in a totally randomized design trial in triplicate groups. the experiment carri...