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Background FOXF2 is a member of the forkhead box (FOX) family of transcription factors. FOXF2 plays an important role in several tumors but its expression and role in hepatocellular carcinoma (HCC) remains unknown. Methods Using immunohistochemistry, western blot, and real-time polymerase chain reaction, we analyzed FOXF2 expression in 295 clinicopathologically characterized HCC cases. Using RNA...
The problem of link scheduling and power control of cognitive radio is discussed in this thesis. Joint algorithm of link scheduling and power control is brought forward to make sure that the demand of directed links are met in the shortest time. The simulation result shows that the algorithm improves throughout and the performance of scheduling obviously.
In this thesis, a frequency spectrum access mechanism, in which future frequency spectrum state is predicted, is brought forward according to the fact that frequency spectrum detection error of Cognitive Radio is inevitable. That mechanism on support vector machine (SVM) method could evaluate the probability density of idle state duration and occupied state duration of authorized users in given channel...
Cognitive radio is thought to be a flexible way to improve the spectrum efficiency. The major challenge is that the communications in the cognitive radio network would be affected by the behaviors of licensed incumbents. The cognitive system must vacate the channel within moving time whenever the licensed incumbents re-occupy that channel, in order to reduce the interference to the licensed system...
Multiple channels can increase network capacity by transmitting traffic on different channels in an interference area. Channel assignment is a critical issue for the multi-channel scheme. In this paper, we propose an efficient distributed channel assignment algorithm for multi-radio multi-channel wireless mesh networks. This scheme seeks to assign distinct channel to each node along the same route,...
Supporting user mobility is an important requirement for wireless mesh networks. We propose a relay-router buffering- and-forwarding scheme for supporting smooth handoff in the infrastructure wireless mesh networks. Our proposal is based on buffering packets at intermediate relay routers in the packets forwarding route and neighboring relay routers working in promiscuous mode which can overhear the...
Multipath routing is one of the applied approaches in wireless mesh networks to address their limited bandwidth and high route breakage rate. Unfortunately, in wireless mesh network environments, particularly for real-time video streaming transmission, this approach may suffer greatly from channel interference due to the simultaneous transmission of packets via multiple routes. In this paper, we propose...
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