Chen Xianjin

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Polyethylenimine (PEI) has been used widely in transient gene expression studies of mammalian cells. We performed transient gene expression in suspension Chinese hamster ovary cells using a one-step transfection procedure in which DNA and PEI were simultaneously added to a cell culture in suspension without prior PEI/DNA complex incubation. To further(More)
In the cognitive radio network [1], the spectrum access mechanism determines the spectrum utilization and the system performance. In this paper, we set up a cognitive radio network scenario with finite primary users and finite secondary users as our simulation model environment. We define a new way by probability anticipation to help secondary users choose(More)
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