Li Hongjian

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Using the closed chamber technique daily changes of net ecosystem carbon dioxide (CO2) exchange (NEE) and ecosystem respiration (Re) were determined in a ryegrass ecosystem on eight separated days at half hour interval from morning to afternoon in Taiyuan basin, Shanxi province of China. The gross primary production (GPP) was calculated as the difference of(More)
The transmission characteristics of a metallic film with subwavelength ellipsoid nanohole arrays are investigated by using the three-dimensional finite-difference time-domain (3D-FDTD) method. The extraordinary transmission is attributed to the collaboration of localized waveguide resonance and surface plasmon resonance. The influences of the lattice(More)
The capacity analysis of cognitive network is rarely studied as the dramatic dynamic character of opportunistic spectrum usage. As the optimal result of network capacity is NP complete, it is necessary to design an efficient algorithm to find the approximated optimal results. This paper proposed a distributed algorithm which is based on the minimum clique(More)
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