Results 121 to 130 of about 808,768 (351)
Signal selection and latency compensation in wide area controlled power system
Energy Science &Engineering, EarlyView.Abstract This paper presents a new approach for selecting signals for the monitoring and control of power systems over a wide area. The approach solves the twin problems of locating Phasor Measurement Units for observability and placing dynamic controllers for controllability using distinct techniques.
Prakash Thyagarajan +1 more
wiley +1 more source
Pairs of positive solutions for resonant singular equations with the p-Laplacian
Electronic Journal of Differential Equations, 2017 We consider a nonlinear elliptic equation driven by the Dirichlet p-Laplacian with a singular term and a (p-1)-linear perturbation which is resonant at $+\infty$ with respect to the principal eigenvalue. Using variational tools, together with suitable
Nikolaos S. Papageorgiou +2 more
doaj
Graph-theoretical approach to the eigenvalue spectrum of perturbed higher-order exceptional points
Physical Review ResearchExceptional points are special degeneracy points in parameter space that can arise in (effective) non-Hermitian Hamiltonians describing open quantum and wave systems.
Daniel Grom +3 more
doaj +1 more source
Ain Shams Engineering Journal, 2016 This paper deals with the modelling and small signal stability analysis for the two areas interconnected power system using a load frequency controller. The eigenvalues and the participation factor analysis are used to examine the small signal stability ...
Ravi Shankar +2 more
doaj +1 more source
Another instructive example in eigenvalue perturbation theory [PDF]
, 1979 M. P. Fry
openalex +1 more source
Heat Transfer, EarlyView.ABSTRACT We present an analytical and numerical study of the entropy production rate in laminar counterflow parallel‐plate heat exchangers, aiming to investigate the interplay between multidimensional wall conduction, entropy production, and the optimum wall conductivity that leads to maximum effectiveness.
Santiago E. Ibáñez +2 more
wiley +1 more source
IET Power Electronics, EarlyView., 2022 This paper introduces the research on the inductance‐capacitor‐capacitor‐inductance grid‐connected inverter using active disturbance rejection and grid voltage feedforward coordinated control technology. The pade approximation is performed on the inductance‐capacitor‐capacitor‐inductance filter to derive the first‐order discretization mathematical ...
Guang‐Xin Zhong +4 more
wiley +1 more source
Information &Functional Materials, EarlyView.A two‐junction 1064 nm VCSEL with double antiresonant oxide islands in the top DBR is designed to enhance fundamental transverse mode operation. By optimizing island count, aperture size, thickness, and position, it achieves 36.2 mW output power, 54.8% PCE, and a 33.06 GHz 3 dB bandwidth.
Xuhao Zhang +8 more
wiley +1 more source
Subcritical perturbations of resonant linear problems with sign-changing potential
Electronic Journal of Differential Equations, 2005 We establish existence and multiplicity theorems for a Dirichlet boundary-value problem at resonance. This problem is a nonlinear subcritical perturbation of a linear eigenvalue problem studied by Cuesta, and includes a sign-changing potential. We obtain
Teodora-Liliana Dinu
doaj
Combining Proxies and Narrative Sign Restrictions: Revisiting the Effects of Technology Shocks
Journal of Applied Econometrics, EarlyView.ABSTRACT This paper proposes a novel integration of the proxy structural vector autoregression approach with narrative sign restrictions to identify multiple shocks with multiple instrumental variables. We show that this combination leads to informative inferences on shock effects through both analytical demonstrations and Monte Carlo simulations ...
Yang Yang, Ren Zhang
wiley +1 more source