Results 31 to 40 of about 142,873 (289)

The Design and Optimization of a Novel Hybrid Excitation Generator for Vehicles

open access: yesWorld Electric Vehicle Journal
Silicon rectifier generators, which are single-excitation generators, are commonly used in vehicles. However, a traditional single-excitation generator cannot satisfy the requirements of modern vehicles due to its low efficiency, high failure rate and ...
Jianwei Ma   +5 more
doaj   +1 more source

A novel non-iterative based framework for quick dynamic assessment of wind energy dominated multi-machine power system

open access: yese-Prime: Advances in Electrical Engineering, Electronics and Energy, 2023
Renewable Energy Sources have considerably expanded in recent years to address the widening energy deficit in modern power systems. Integrating these sources raises significant concerns for power system management, with transient stability constraints of
Akintunde Samson Alayande   +2 more
doaj   +1 more source

Improved Pseudorandom Generators from Pseudorandom Multi-Switching Lemmas [PDF]

open access: yes, 2018
We give the best known pseudorandom generators for two touchstone classes in unconditional derandomization: an $\varepsilon$-PRG for the class of size-$M$ depth-$d$ $\mathsf{AC}^0$ circuits with seed length $\log(M)^{d+O(1)}\cdot \log(1/\varepsilon ...
Servedio, Rocco A., Tan, Li-Yang
core   +2 more sources

Towards Complexity for Quantum Field Theory States

open access: yes, 2018
We investigate notions of complexity of states in continuous quantum-many body systems. We focus on Gaussian states which include ground states of free quantum field theories and their approximations encountered in the context of the continuous version ...
Chapman, Shira   +3 more
core   +1 more source

Pseudorandomness for Approximate Counting and Sampling [PDF]

open access: yes, 2005
We study computational procedures that use both randomness and nondeterminism. The goal of this paper is to derandomize such procedures under the weakest possible assumptions.
Shaltiel, Ronen, Umans, Christopher
core   +4 more sources

Matrix converter based virtual synchronous generation technology

open access: yesThe Journal of Engineering, 2019
Energy is an important driving force for social development. The shortage of natural resources urgently promotes the research of energy and the development of related technologies.
Chuyun Li   +3 more
doaj   +1 more source

Electromagnetic characteristic of a novel hybrid excitation generator for vehicles based on the field-and-circuit method

open access: yesFrontiers in Mechanical Engineering
IntroductionThe electro-magnetic generator commonly used in automobiles generally has high excitation loss leading to low efficiency. And it cannot effectively provide power for the vehicle, thus shortening battery life.In order to solve the issues, a ...
Jianwei Ma   +9 more
doaj   +1 more source

Trajectories entropy in dynamical graphs with memory [PDF]

open access: yes, 2016
In this paper we investigate the application of non-local graph entropy to evolving and dynamical graphs. The measure is based upon the notion of Markov diffusion on a graph, and relies on the entropy applied to trajectories originating at a specific ...
Caravelli, Francesco
core   +3 more sources

Encoding One Logical Qubit Into Six Physical Qubits [PDF]

open access: yes, 2008
We discuss two methods to encode one qubit into six physical qubits. Each of our two examples corrects an arbitrary single-qubit error. Our first example is a degenerate six-qubit quantum error-correcting code.
Bilal Shaw   +9 more
core   +3 more sources

Generalized circuits. Elements of a mathematical theory

open access: yesJournal of Pure and Applied Algebra, 1983
The author develops a mathematical theory of generalized electrical circuits. He defines such a circuit as a system \(Ct=\{\Lambda;\quad G;\quad C(X),\quad X\in V(G)\},\) where \(\Lambda\) is an abelian group or vector space with an involutive automorphism, G is an oriented graph, and, for each vertex X of G, C(X) is a subset of \(\Lambda^ p\) (where p
openaire   +1 more source

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