http://ieeexplore.ieee.org/iel5/5610941/5624686/05624745.pdf

Power electronics

Power electronics is a discipline spawned by real-life applications in industrial, commercial, residential, and aerospace environments. Much of its development revolves around some immediate need for solving specific power conversion problems. This comprehensive book focuses on the typical bifurcation scenarios and nonlinear behavior observed in switching power converters, expounding on their most relevant aspects from a practical viewpoint. A balanced emphasis on theory, computer methods, and laboratory experiments bridges the gap between the theoretical research and practical engineering applications.

Complex Behavior of Switching Power Converters

Neuromorphic computing has come to refer to a variety of brain-inspired computers, devices, and models that contrast the pervasive von Neumann computer architecture This biologically inspired approach has created highly connected synthetic neurons and synapses that can be used to model neuroscience theories as well as solve challenging machine learning problems The promise of the technology is to create a brain-like ability to learn and adapt, but the technical challenges are significant, starting with an accurate neuroscience model of how the brain works, to finding materials and engineering breakthroughs to build devices to support these models, to creating a programming framework so the systems can learn, to creating applications with brain-like capabilities In this work, we provide a comprehensive survey of the research and motivations for neuromorphic computing over its history We begin with a 35-year review of the motivations and drivers of neuromorphic computing, then look at the major research areas of the field, which we define as neuro-inspired models, algorithms and learning approaches, hardware and devices, supporting systems, and finally applications We conclude with a broad discussion on the major research topics that need to be addressed in the coming years to see the promise of neuromorphic computing fulfilled The goals of this work are to provide an exhaustive review of the research conducted in neuromorphic computing since the inception of the term, and to motivate further work by illuminating gaps in the field where new research is needed

A Survey of Neuromorphic Computing and Neural Networks in Hardware.

Over the last two decades, theoretical design and circuit implementation of various chaos generators have been a focal subject of increasing interest due to their promising applications in various ...

/pdf/generating-multiscroll-chaotic-attractors-theories-methods-16uxys4njg.pdf

Generating Multiscroll Chaotic Attractors: Theories, Methods and Applications

In this letter, a simple nonlinear state feedback controller is designed for generating hyperchaos from a three-dimensional autonomous chaotic system. The hyperchaotic system is not only demonstrated by computer simulations but also verified with bifurcation analysis, and is implemented experimentally via an electronic circuit.

Generating hyperchaos via state feedback control

An approach toward higher dimensional autonomous chaotic circuits is discussed. Special consideration is given to a particular class of circuits which includes only one nonlinear element, namely, a three-segment piecewise-linear resistor, and one small inductor, L/sub 0/, serially connected with it. A simple four-dimensional example that realizes hyperchaos is given. For the case in which L/sub 0/ is shorted, the circuit equation can be simplified to a constrained system and a two-dimensional Poincare map can be rigorously derived. This mapping and its Lyapunov exponents verify laboratory measurements of hyperchaos and related phenomena. A rigorous approach to the singular perturbation theory of an N-dimensional circuit family that includes the above example is then provided. A canonical equation which describes any circuit in this family is derived. This equation can also be simplified to a constrained system, and an (Nn-2)-dimensional Poincare map can be derived. The main theorem indicates that this mapping explains the observable solutions of the canonical form very well. >

An approach toward higher dimensional hysteresis chaos generators

This paper studies a pulse-coupled network consisting of simple chaotic spiking oscillators (CSOs). If a unit oscillator and its neighbor(s) have (almost) the same parameter values, they exhibit in-phase synchronization of chaos. As the parameter values differ, they exhibit asynchronous phenomena. Based on such behavior, some synchronous groups appear partially in the network. Typical phenomena are verified in the laboratory via a simple test circuit. These phenomena can be evaluated numerically by using an effective mapping procedure. We then apply the proposed network to image segmentation. Using a lattice pulse-coupled network via grouping synchronous phenomena, the input image data can be segmented into some sub-regions.

Grouping synchronization in a pulse-coupled network of chaotic spiking oscillators

This paper discusses a circuit family including a dependent switched capacitor (DSC). The DSC function is instantaneously short of one capacitor at the moment when its voltage reaches a threshold. The chaos generation can be guaranteed theoretically. We also consider a master-slave system. If there does not exist a homoclinic orbit in the master chaos attractor, it exhibits either in-phase or inverse-phase synchronization of chaos. If there exists a homoclinic orbit, the synchronization is broken down. We explain the synchronization mechanism and evaluate its robustness theoretically. The theoretical results have been verified in laboratory experiments.

Dependent switched capacitor chaos generator and its synchronization

A novel and extremely simple design of a hysteresis chaos generator is proposed. The circuit consists of two capacitors, two resistors, one linear VCCS and one hysteresis VCCS. The two VCCSs are implemented by using OTA and realize stretching and folding mechanism for chaos generation.

An RC OTA hysteresis chaos generator

This paper considers a simple piecewise linear hysteresis circuit. We define one-dimensional return map and derive its analytic formula. It enables us to give a sufficient condition for chaos generation and to analyse bifurcation phenomena rigorously. Especially, we have discovered period-doubling bifurcation with symmetry breaking. Some of theoretical results are verified by laboratory measurements.

Toshimichi Saito

Papers

An approach toward higher dimensional hysteresis chaos generators

Grouping synchronization in a pulse-coupled network of chaotic spiking oscillators

Dependent switched capacitor chaos generator and its synchronization

An RC OTA hysteresis chaos generator

Chaos from a hysteresis and switched circuit