Xudong Chen

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—In the domain of computer security, how to enhance the speed of RSA algorithm has been the research hot spot. With the recent tremendous increase in Graphics Processing Unit's computing capability as a co-processor of the CPU, Nvidia's Compute Unified Device Architecture (CUDA) can greatly benefit single instruction multiple thread styled, computationally(More)
— We use a hybrid model including asymptotic expressions of the spheroidal wave functions (SWFs) to obtain a reliable, broadband solution for the electromagnetic induction (EMI) response from a conducting and permeable spheroid. We obtain this broadband response, valid in the magnetoquasistatic regime from 0 Hz to 100's of kHz, by combining three different(More)
In this paper, a recently proposed reversible image watermarking algorithm based on reversible contrast mapping (RCM) is further developed. The integer transform, RCM, which is originally defined on a pair of integers, is extended to integer array of arbitrary length. Based on this generalization, the embedding capacity can be significantly increased.(More)
— In this paper, we consider a class of gradient flows that model rules by which a multi-agent system might approach to an equilibrium. The rules are quite simple to state, in fact they depend on a single attraction/repulsion function, but in the generality assumed here the analysis of the resulting flow presents several challenges. In part, these(More)
—We consider in this paper a networked system of opinion dynamics in continuous time, where the agents are able to evaluate their self-appraisals in a distributed way. In the model we formulate, the underlying network topology is described by a rooted digraph. For each ordered pair of agents (i, j), we assign a function of self-appraisal to agent i, which(More)