Equivalent-Layer Method for Optical Waveguides with a Multi-Quantum-Well Structure

An equivalent-layer method for analyzing multiple-quantum-well (MQW) waveguides is presented. This method not only allows the whole waveguide to be treated as a three-layer waveguide but offers exact solutions for the propagation constant of MQW waveguides and the power confinement factor within the MQW structure as well. A comparison between this method and two other three-layer models is given

On recent data of branching ratios for psi(2S)-->J/psi pi pi and psi(2S)-->J/psi eta

Recent data on branching ratios for \psi(2S) decays to J/\psi\pi^+\pi^-, J/\psi\pi^0\pi^0 and J/\psi\eta are reviewed. An alternative treatment of data is proposed to get rid of the logical inconsistency which occurs in original computational procedure.Comment: 6 pages in Revtex format, no figure, 3 tables, corrected 1 typ

Regional Electric-Power Systems Planning and Carbon Dioxide Emissions Management under Uncertainty

In this study, an interval two-stage integer programming model is formulated for planning electric-power systems and managing carbon dioxide (CO2) emissions under uncertainty. The developed model can reflect dynamic, interactive, and uncertain characteristics of regional energy systems. Besides, the model can be used for answering questions related to types, times, demands and mitigations of energy systems planning practices, with the objective of minimizing system cost over a long-time planning horizon. The developed model is also applied to a case study of planning CO2-emission mitigation for an electric-power system that involves fossil-fueled and renewable energy sources. Solutions can help generate electricity-generation schemes and capacity-expansion plans under different CO2-mitigation options and electricity-demand levels. Different CO2-emission management policies corresponding to different renewable energy development plans are analyzed. A high system cost will increase renewable energy supply and reduce CO2 emission, while a desire for a low cost will run into risks of a high energy deficiency and a high CO2 emission

A hybrid time-domain discontinuous Galerkin-boundary integral method for 3-D electromagnetic scattering analysis

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