Results 321 to 330 of about 2,499,047 (376)

Modulation instability, conservation laws and soliton solutions for an inhomogeneous discrete nonlinear Schrödinger equation

Nonlinear Dynamics, 2017
Hui-Qin Hao, Rui Guo, Jian-Wen Zhang
semanticscholar   +3 more sources

Strongly Discrete Modules

Communications in Algebra, 2007
We call supplemented self-projective modules “strongly discrete modules.” We characterize discrete and strongly discrete modules in terms of lifting of maps and prove some of their properties. We show that epi-projective lifting modules are precisely the strongly discrete modules and dually mono-injective extending modules are precisely the self ...
Lalitha Ganesan, N. Vanaja
openaire   +1 more source

Unidimensional continuous-variable quantum key distribution with discrete modulation

Physics Letters, 2020
In this paper, we proposed an unidimensional continuous-variable quantum key distribution (CV-QKD) protocol with discrete modulation, which waives the necessity in one of the quadrature modulations and further simplified the implementation of the CV-QKD ...
Wei Zhao, Ronghua Shi, Yanyan Feng, Duan Huang   +3 more
semanticscholar   +1 more source

Modulational instabilities in discrete lattices

Physical Review A, 1992
We study analytically and numerically modulational instabilities in discrete nonlinear chains, taking the discrete Klein-Gordon model as an example. We show that discreteness can drastically change the conditions for modulational instability; e.g., at small wave numbers a nonlinear carrier wave is unstable to all possible modulations of its amplitude ...
, Kivshar, , Peyrard
openaire   +2 more sources

Model Predictive Control of PMSM Drives Based on General Discrete Space Vector Modulation

IEEE transactions on energy conversion, 2021
Apart from the basic voltage vectors of a inverter, virtual vectors can be generated by discrete space vector modulation (DSVM) technique. Thus, DSVM based-model predictive control (MPC) can achieve reduced torque ripples and current harmonics for a ...
Yongchang Zhang, Hao Jiang, Haitao Yang
semanticscholar   +1 more source

Model Predictive Torque Control for Dual Three-Phase PMSMs with Simplified Deadbeat Solution and Discrete Space-Vector Modulation

IEEE transactions on energy conversion, 2021
Unprecise voltage vectors applied in conventional model predictive control (MPC) would cause additional ripples in electromagnetic torque. To eliminate the problem, this article proposes an improved model predictive torque control (MPTC) based on ...
Wusen Wang, Chunhua Liu, Senyi Liu, Hang Zhao   +3 more
semanticscholar   +1 more source

Quantum catalysis-based discrete modulation continuous variable quantum key distribution with eight states

, 2020
How to lengthen the maximum transmission of continuous variable quantum key distribution (CVQKD) has been a notorious hard problem in quantum communications.
Ying Guo, Jian-Zhi Ding, Yun Mao, W. Ye, Qin Liao, Duan Huang   +5 more
semanticscholar   +1 more source

Rate-Adaptive Reconciliation for Experimental Continuous-Variable Quantum Key Distribution With Discrete Modulation Over a Free-Space Optical Link

Journal of Lightwave Technology
Continuous-variable quantum key distribution (CV-QKD) has been proposed as a method for securely exchanging keys to protect against the security concerns caused by potential advancements in quantum computing.
Kadir Gümüş, J. Frazão, V. van Vliet, S. van der Heide, M. V. D. Hout, G. Liga, Yunus Can Gültekin, A. Albores-Mejia, T. Bradley, Alex Alvarado, C. Okonkwo   +10 more
semanticscholar   +1 more source

Experimental Observation of Discrete Modulational Instability

Physical Review Letters, 2004
We report the first experimental observation of modulation instability in a discrete optical nonlinear array.
J, Meier, G I, Stegeman, D N, Christodoulides, Y, Silberberg, R, Morandotti, H, Yang, G, Salamo, M, Sorel, J S, Aitchison   +8 more
openaire   +3 more sources

DISCRETE AND QUASI-DISCRETE MODULES

Communications in Algebra, 2002
ABSTRACT We show that discrete and quasi-discrete modules can be characterized in terms of the lifting of homomorphisms from to , for certain submodules of . We prove that is quasi-discrete iff is amply supplemented and satisfies for every positive integer and; is discrete iff is lifting and satisfies for every positive integer .
openaire   +1 more source