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In this paper, we investigate the energy efficiency maximization problem of analog network coding (ANC) based two-way relay (TWR) assisted cellular network under quality of service (QoS) constraints through transmit power optimization. Circuit power cannot be ignored since it influences energy efficiency greatly. However, the difficulty is that maximizing energy efficiency is shown to be non-convex...
A new method to design codebook is proposed for Linear Dispersion Code (LDC) systems with limited feedback The extended codebook design method is introduced based on Grassmannian subspace packing and a mapping function, which is derived from the relationship between SVDs of the classical multiplexing systems and the LDC systems. Our proposed codebook can guarantee the maximum min-distance of the finite...
The advent of cloud systems has spurred the emergence of an impressive assortment of Internet services. Recent pressures on enhancing the profitability by curtailing surging dollar costs on energy have posed challenges to, as well as placed a new emphasis on, designing energy-efficient request dispatching and resource management algorithms. What further adds to the design challenge is the highly diverse...
By using Gaines and Mawhin's continuation theorem of coincidence degree theory, we studied the global existence of positive periodic solutions of a predator-prey diffusive model with ratio-dependence and feedback control. We obtain a set of verifiable sufficient conditions to guarantee the existence of positive periodic solutions of the system, which improve some known results.
In this paper we present a novel symmetry auto-detection approach which is used for the symmetry detection of the objects in images. Rather than relying on gradients and pixel matching of an image, symmetry can be automatically detected by using corner detection on a symmetry function which is proposed in Hsu's paper, and a result will be shown to demonstrate the probability that the object in the...
In the wireless LAN, positioning technology based on signal strength of indoor gets more and more attention. in this paper, We introduce Carl filtering algorithm in positioning technology based on signal strength of indoor, it could filter the sampling data to eliminate some noise, and then improves the system's positioning accuracy. the Experimental results show that Carl filtering algorithm could...
Femtocells are low-power base stations to extend the cellular network coverage and provide high speed data service for indoor environments. To solve the severe interference problem introduced by unattached co-channel users, the interference mitigation technique, uplink attenuation, can be implemented at femtocell receivers. In this paper, we investigate the close-form outage probability function to...
Some species are cannibalistic and their lives can be divided into several stages. When this kind of species is predator, a stage-structured species model with time delay, Holling type IV functional response and cannibalism can be formulated. The sufficient condition for existence of positive periodic solution is obtained by using coincidence degree theory. Some new results are obtained.
The effects of low intensity of heating treatments and storage conditions on growth properties of mould in rice were investigated and a model was obtained to describe the growth properties of mould. The parameters of growth properties of rice mould were obtained in order to provide the information for the control of rice mould. The rice samples were treated with traditional heating and microwave radiation,...
Creep behavior of rice gel was determined by texture analyzer, and creep models based on strain and time were established for investigating the molecular configuration and visco-elastic properties from textural parameters. The strain of the rice gel increased gradually with time when a fixed stress was applied, and reached a steady value during late creep. Creep course of rice gel mainly consisted...
We address the question of, what structure of a set of lines in space constitutes a critical configuration to three generally positioned cameras. By critical configuration, it is meant a set of lines in space whose image projections to the cameras do not allow unique determination of the cameraspsila relative positions in space. We approach the question by looking into the trifocal tensor of the cameraspsila...
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