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For most existing image segmentation methods based on Active Contours, the contour evolutions tend to get trapped in local optima and thus cause the segmentation methods sensitive to contour initialization and deficient in dealing with noisy and inhomogeneous regions. Aiming at this problem, we propose an Active Contour model with Entropy-based Constraint (ACEC). Specifically, the entropy-based constraint...
A password based authenticated key exchange protocol is of practical usefulness in the protection of sharing of urban rail train sensor monitoring data. However, many password-based protocols in the literature were not secure. Recently, Huang presented a simple and efficient three-party password-based authenticated key exchange protocol. However, Yoon et al. found it had some security weaknesses....
This paper presents a new equivalent circuit model of hybrid supercapacitor with aqueous electrolyte which can describe its dynamic characteristic during the process of charging and discharging. Firstly, each component of hybrid supercapacitor with aqueous electrolyte was modeled separately. Then the whole equivalent circuit model was built by combining each component' s model. Subsequently the least...
In order to improve the simulation efficiency, this paper presents a kind of switch-averaged model for the energy storage system to analyze its stability. This energy storage system is applied in metro vehicles that use supercapacitors as the energy storage elements to provide desired management of the power flows. In order to achieve quick response, an effective and simple control method using state...
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