Shu-Ming Chang

Learn More
In this paper we propose two iterative methods, a Jacobi-type iteration (JI) and a Gauss-Seidel-type iteration (GSI), for the computation of energy states of the time-independent vector Gross-Pitaevskii equation (VGPE) which describes a multicomponent Bose-Einstein condensate (BEC). A discretization of the VGPE leads to a nonlinear algebraic eigenvalue(More)
Nonlinear Schrödinger equations (NLSs) with focusing power nonlinearities have solitary wave solutions. The spectra of the linearized operators around these solitary waves are intimately connected to stability properties of the solitary waves and to the long-time dynamics of solutions of NLSs. We study these spectra in detail, both analytically and(More)
UNLABELLED Epstein-Barr virus (EBV) BKRF3 shares sequence homology with members of the uracil-N-glycosylase (UNG) protein family and has DNA glycosylase activity. Here, we explored how BKRF3 participates in the DNA replication complex and contributes to viral DNA replication. Exogenously expressed Flag-BKRF3 was distributed mostly in the cytoplasm, whereas(More)
In this paper, we propose a robust hyperchaotic system that is practically serviceable in digital securecommunication. The system consists of many coupled robust logistic maps that form a hyper-chaotic system. The system has a very large parameter space which grows along with the system precision. Moreover, it has higher degree of complexity than(More)
A beam-hardening effect is a common problem affecting the quantitative aspects of X-ray computed tomography (CT). We have developed two statistical reconstruction algorithms for poly-energetic X-ray CT that can effectively reduce the beam-hardening effect. Phantom tests were used to evaluate our approach in comparison with traditional correction methods.(More)
We develop a continuation block successive over-relaxation (BSOR)-Lanczos-Galerkin method for the computation of positive bound states of time-independent, coupled Gross-Pitaevskii equations (CGPEs) which describe a multi-component BoseEinstein condensate (BEC). A discretization of the CGPEs leads to a nonlinear algebraic eigenvalue problem (NAEP). The(More)
In this paper, we propose a digitalized chaotic map, Variational Logistic Map (VLM), modified from classical logistic map to be used in secure communication. Compared with classical logistic map, VLM has large parameter space without windows and can be implemented at low hardware cost. Referring to statistical testing suites SP800-22 and TestU01, VLM with(More)
In this paper, a DLL-based frequency multiplier is proposed. No LC-tank and ring oscillator are used in the proposed design such that the power dissipation and chip area are drastically reduced. Moreover this multiplier doesn't require external component and it is primarily intended for ASIC design. The HSPICE simulation results are based upon TSMC 0.18(More)
This paper describes a fully differential DLL-based frequency multiplier using a noise-rejected voltage-controlled delay line (VCDL). In order to improve the power consumption and synthesized frequency range of the DLLbased frequency multiplier, we design an edge combiner using current mode logic to generate fully differential output clock. This edge(More)