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A piecewise analytical function is proposed and applied to investigate the steady-state behavior of series–parallel resonant converter operated in a discontinuous current mode. The converter shows two sequences of the equivalent circuits alternatively operated in the discontinuous current mode with different output voltages. To get the response time of current in one resonance, a successive solving...
Drought is the first place in all the natural disasters in the world. It is especially serious in North China Plain. In this paper, different soil water content control levels at winter wheat growth stages are performed on Gucheng Ecological-Meteorological Integrated Observation Experiment Station of CAMS, China. Some canopy parameters, including growth conditions, dry weight, physiological parameters...
In this article, we present a novel approach based on PMCHW integral equation formulation in conjunction with the adaptively modified characteristic basis function method (AMCBFM) to solve the scattering from homogenous dielectric bodies. In the new method, equivalent electric and magnetic currents on the surface of object are needed and expanded using RWG basis functions. AMCFBM is subsequently used...
The characterization of the access structures of ideal secret sharing schemes is one of the main open problems in secret sharing and has important connections with matroid theory. In the EUROCRYPT'07, Farras made a important contribution to this work by using discrete polymatroids. In particular, they further gave a very difficult open problem, that is, characterizing the representable discrete polymatroids,...
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