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In this text, we consider the problem of fair scheduling in the downlink of Orthogonal Frequency Division (OFDM) systems. Based on be proportional fair scheduling algorithm proposed in the CDMAfHDR, we present three schemes to manage the parallel subcarriers in the OFDM system to utilize the time selectivity and frequency selectivity. Subcarriers in a slot(More)
[2] A comprehensive 30330 arc-second resolution gridded soil characteristics data set of China has been developed for use in the land surface modeling. It includes physical and chemical attributes of soils derived from 8979 soil profiles and the Soil Map of China (1:1,000,000). We used the polygon linkage method to derive the spatial distribution of soil(More)
In Saccharomyces cerevisiae, optimal utilization of various compounds as a nitrogen source is mediated by a complex transcriptional network. The zinc cluster protein Dal81 is a general activator of nitrogen metabolic genes, including those for γ-aminobutyrate (GABA). In contrast, Uga3 (another zinc cluster protein) is an activator restricted to the control(More)
Resulted by the hundreds of antennas at the base-station (BS) side, the dimension of matrices involved in linear detection for massive multiple-input multiple-output (MIMO) uplink systems increases drastically. Being an indispensable part of linear detection, the matrix inversion suffers a lot from the huge matrix size of massive MIMO, and therefore becomes(More)
Accurate channel estimation is a necessary condition for data demodulation in wireless communication systems. Compared to traditional channel estimation method, compressed sensing theory can take full use of the sparse characteristics of the channel. The contradiction between channel estimation error and message rate can be effectively solved. Based on a(More)
Along with the development of virtual reality and digital games, the dynamic virtual scenes become more and more complex. Real-time simulation of massive fluid and solid bodies is a challenge in common PC machine. We use the three layer design for the physics engine, so performance optimization can be done apart. Collision detection of solid and fluid is(More)
Over the past decade, electronic word-of-mouth communication (EWOM) has become more salient in online contexts. However, the extant literature on EWOM has largely depended upon theories developed in traditional offline contexts. We proposed that both individual and social settings should not be ignored in the study of EWOM and sought to integrate two(More)
The surface pining effects on phase separation dynamics of polymer-dispersed liquid crystals (PDLCs) with thin cell gaps are demonstrated. Comparing various boundary conditions, the inner surfaces of the substrates with or without polyimide layers [but no rubbing] cannot provide enough anchoring force, so in either case the liquid crystal (LC) droplets flow(More)
Different emotional states lead to distinct behavioural consequences even when faced with the same challenging events. Emotions affect learning and memory capacities, but the underlying neurobiological mechanisms remain elusive. Here we establish models of learned helplessness (LHL) and learned hopefulness (LHF) by exposing animals to inescapable foot(More)