Existing impedance-based stability criterion (IBSC) for electromagnetic assessment of multiple-grid-connected-inverter (GCI)-based power systems suffers from several limitations. First, global feature is hard to be obtained if Nyquist-criterion-based IBSC used. Second, heavy computational burdens caused by either right-half-plane (RHP) poles calculation impedance ratios or nodal admittance matr...

The effect of a zero in the right-half plane on the controller derived through the stability theorem of Lyapunov is considered through a simple illustrative example. It is shown that the controller should have the form of a linear saturating function instead of the bang-bang form for the minimum-phase systems. Many industrial processes are known to exhibit a dead-time delay in their txansfer ch...

In the present paper, a separation/preconcentration procedure is presented for the solid phase extraction of Pb and Cd from environmental samples on a natural adsorbent (ram horn powder, RHP), prior to their determination by flame atomic absorption spectrometry (FAAS). The procedure is based on the adsorption of the bivalent ions of these metals as their 1-nitroso-2-naphthol-3,6-disulphonic aci...

An organic geochemical investigation combined with sequence stratigraphy was performed in the Ceará Basin, an offshore basin located Northeastern Brazil. The information available from 30 well logs (gamma-ray, resistivity, density), besides (TOC, and pyrolysis indexes) isotopic (?13C) data, aided preparation of a dataset for this study. application sequence-stratigraphic methods helped classify...

In this paper, damping of interarea oscillations using simultaneous coordination of static Var compensator (SVC) and power system stabilizer (PSS) is considered.  To be effective in damping of oscillations, the best-input signal of power oscillation damper (POD) associated with SVC is selected using Hankel singular values (HSVs), and right-hand plane zeros (RHP-zeros). The 4-machine-2 area...

Michael M. Kasumovic, Andrew C. Mason, Maydianne C.B. Andrade, and Damian O. Elias Evolution & Ecology Research Centre, School of Biological, Earth & Environmental Sciences, University of New South Wales, Kensington, Sydney 2052 NSW, Australia, Integrative Behaviour and Neuroscience Group, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada, and Department of Environmental Scie...

A simple genetic algorithm is applied by simulation for the tuning of centralized and decentralized controllers for linear non-square multivariable systems with RHP zeros. All the loops are first tuned independently using Ziegler-Nichols method based on closed loop oscillation. A detuning factor is used to obtain the range of controller parameters. This approximate range of the controller param...

The Office of Minority Health at the Rhode Island Department of Health formally initiated the Refugee Health Program (RHP) in August 2004. The goal is to ensure that refugees and asylees enter into a comprehensive system of care that responds to their unique health care needs by addressing three main components: coordination of care, education and training, and surveillance and epidemiology. Re...