IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
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Global stability of a class of discrete-time recurrent neural networks
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1104-1117 - 2002
This paper presents several analytical results on global asymptotic stability
(GAS) and global exponential stability (GES) for the equilibrium states of a
general class of discrete-time recurrent neural networks (DTRNNS) with
asymmetric connection weight matrices and globally Lipschitz continuous and
monotone nondecreasing activation functions. A necessary and sufficient
condition is formulated to...
#Recurrent neural networks #Neural networks #Asymptotic stability #Lyapunov method #Symmetric matrices #Stability analysis #Sufficient conditions #Signal processing #Stability criteria #Design optimization
A PWL circuit approach to the definition of a /spl epsiv/-approximation model of scalar static hysteresis
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1290-1308 - 2002
A piecewise-linear (PWL) circuit model of hysteresis phenomena is presented. The
proposed model involves the use of parallel-connected simple PWL circuits. The
PWL characteristic of the model allows a direct determination of the condition
on a rate-independent hysteresis behavior. The basic features of the model are
discussed through proper demonstrations. In particular, it is shown that the
param...
#Hysteresis #Biological system modeling #Piecewise linear techniques #Nonlinear circuits #Mathematical model #Robustness #Arithmetic #Ferroelectric materials #Biological systems
The effects of generation redispatch on Hopf bifurcations in electric power systems
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1180-1186 - 2002
In this paper, we examine how varying the generation redispatch can improve the
system stability margins with respect to Hopf bifurcations, as well as
robustness to uncertainties in load modeling and distribution. It is seen that
an optimal selection of load following units plays a key role in accomplishing
these objectives. An optimal redispatch strategy is proposed, and is verified
through a var...
#Power generation #Bifurcation #Power system modeling #Voltage #Load modeling #Eigenvalues and eigenfunctions #Robust stability #Power system stability #Differential equations #Power system dynamics
A loop-breaking method for the analysis and simulation of feedback amplifiers
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1045-1061 - 2002
Two-circuit models for feedback subcircuits are developed from a modification to
the two-port method of feedback amplifier analysis and are applied in a method
to break the feedback loop. These models are terminally equivalent to linear and
nonlinear subcircuits, have physically-disconnected topologies, and employ
dependent sources to control lateral signal transfer with a switch-like on or
off ma...
#Analytical models #Feedback amplifiers #Feedback loop #Operational amplifiers #SPICE #Integrated circuit interconnections #Circuit simulation #Voltage #Circuit topology #Equivalent circuits
An improved global stability result for delayed cellular neural networks
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1211-1214 - 2002
This paper presents a sufficient condition for the uniqueness and global
asymptotic stability of the equilibrium point for delayed cellular neural
networks. This result improves and generalizes some of the previous stability
results derived in the literature.
#Cellular neural networks #Asymptotic stability #Stability analysis #Sufficient conditions #Mathematical model #Circuits #Equations
Analysis and minimization of L/sub 2/-sensitivity for linear systems and two-dimensional state-space filters using general controllability and observability Gramians
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1279-1289 - 2002
A novel expression for the evaluation of L/sub 2/-sensitivity is developed for
the cases of linear discrete-time systems, linear continuous-time systems, and
two-dimensional (2-D) state-space digital filters. This is accomplished by
introducing the concept of general controllability and observability Gramians in
each case. Moreover, the L/sub 2/-sensitivity measures obtained here contain the
conve...
#Linear systems #Digital filters #Observability #Minimization #Controllability #Symmetric matrices #Transfer functions #Nonlinear filters #Two dimensional displays #Coordinate measuring machines
Optimal digital redesign of hybrid cascaded input-delay systems under state and control constraints
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1382-1392 - 2002
This paper presents a new multi-objective evolutionary programming (MOEP)-based
digital redesign scheme to find an optimal low-gain digital tracking controller
for hybrid control of multi-input, multi-output (MIMO) cascaded analog systems
with input time delays, having the constraints on the states and inputs. The
proposed global optimization searching technique enables one to find a high-gain
opt...
#Optimal control #Control systems #Digital control #MIMO #Delay effects #Pulse modulation #Genetic programming #Constraint optimization #Sampling methods #Amplitude modulation
Design and simulation of a single-electron random-access memory array
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1370-1375 - 2002
A single-electron random-access memory array is designed and its operation is
analyzed using Monte Carlo simulation. This memory array utilizes a basic
single-electron memory cell that has been recently fabricated. Bits of
information are represented by the presence or absence of a single or a small
number of electrons at conducting islands. Simulation shows that selective read
and write operation...
#Single electron memory #Circuit simulation #Electron traps #Computational modeling #Computer simulation #Application software #CMOS technology #Read-write memory #Power dissipation #Inverters
Lyapunov-theory-based radial basis function networks for adaptive filtering
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1215-1220 - 2002
Two important convergence properties of Lyapunov-theory-based adaptive filtering
(LAF) adaptive filters are first explored. The LAF finite impulse response and
infinite impulse response adaptive filters are then realized using the radial
basis function (RBF) neural networks (NNs). The proposed adaptive RBF neural
filtering system possesses the distinctive properties of RBF NN and the LAF
filtering...
#Radial basis function networks #Adaptive filters #IIR filters #Neural networks #Finite impulse response filter #Filtering #Lyapunov method #Convergence #Stochastic processes #Stability
Noise analysis of phase-locked loops
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1309-1316 - 2002
This work addresses the problem of noise analysis of phase-locked loops (PLLs).
The problem is formulated as a stochastic differential equation and is solved in
the presence of circuit white noise sources yielding the spectrum of the PLL
output. Specifically, the effect of loop filter characteristics, phase-frequency
detector, and phase noise of the open-loop voltage-controlled oscillator (VCO)
on...
#Phase noise #Phase locked loops #Voltage-controlled oscillators #Filters #Phase detection #Shape measurement #Circuit noise #Phase frequency detector #Phase measurement #Stochastic resonance
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