Results 21 to 30 of about 402,124 (271)

Nonlinearity in a dynamo [PDF]

open access: yes, 2009
Using a rotating flat layer heated from below as an example, we consider effects which lead to stabilizing an exponentially growing magnetic field in magnetostrophic convection in transition from the kinematic dynamo to the full non-linear dynamo.
Cattaneo F   +9 more
core   +1 more source

STUDY OF THE INFLUENCE OF CRACKS ON THE BEARING CAPACITY OF REINFORCED CONCRETE PLATES USING THE PRINS CALCULATION COMPLEX

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2020
Objectives. In order to determine a residual safety factor, a finite element method is considered for determining the bearing capacity of reinforced concrete plates having defects in the form of cracks.Method.
K. R. Aydemirov, V. P. Agapov
doaj   +1 more source

地震数据采集器非线性指标测试方法及其影响分析

open access: yesDizhen xuebao, 2019
为了分析总谐波失真度和互调失真度这两个非线性指标的测试方法、输入信号幅值等变化对其测试结果的影响,本文从总谐波失真信号、互调失真信号的产生原理出发,详细地给出了两种指标的测试方法、数据处理方法及相关影响分析,并通过实际应用中不同类型的输入信号进行了总谐波失真度和互调失真度试验。测试结果表明:信号模式和信号幅值对总谐波失真度的影响显著;输入信号幅值对互调失真度的影响较大;输入信号的频率变化对两指标的测试结果无影响。本研究进一步细化了地震数据采集器性能指标的标准化测试方法 ...
Caihua Li   +6 more
doaj   +1 more source

Ancient and Current Chaos Theories [PDF]

open access: yesInterdisciplinary Description of Complex Systems, 2006
Chaos theories developed in the last three decades have made very important contributions to our understanding of dynamical systems and natural phenomena. The meaning of chaos in the current theories and in the past is somewhat different from each other.
Güngör Gündüz
doaj  

Second order nonlinear frequency generation at the nanoscale in dielectric platforms

open access: yesAdvances in Physics: X, 2022
Nonlinear frequency generation at the nanoscale is a hot research topic which is gaining increasing attention in nanophotonics. The generation of harmonics in subwavelength volumes is historically associated with the enhancement of electric fields in the
Davide Rocco   +12 more
doaj   +1 more source

Effect of nonlinearity on the dynamics of a particle in dc field-induced systems [PDF]

open access: yes, 1998
Dynamics of a particle in a perfect chain with one nonlinear impurity and in a perfect nonlinear chain under the action of dc field is studied numerically. The nonlinearity appears due to the coupling of the electronic motion to optical oscillators which
A. M. Jayannavar   +13 more
core   +2 more sources

Direct measurement of superdiffusive and subdiffusive energy transport in disordered granular chains [PDF]

open access: yes, 2017
The study of energy transport properties in heterogeneous materials has attracted scientific interest for more than a century, and it continues to offer fundamental and rich questions.
Kevrekidis, P. G.   +5 more
core   +3 more sources

Discrete localized modes supported by an inhomogeneous defocusing nonlinearity

open access: yes, 2013
We report that infinite and semi-infinite lattices with spatially inhomogeneous self-defocusing (SDF)\ onsite nonlinearity, whose strength increases rapidly enough toward the lattice periphery, support stable unstaggered (UnST) discrete bright solitons ...
Gligoric, Goran   +3 more
core   +1 more source

Nonlinear Schrodinger equation with chaotic, random, and nonperiodic nonlinearity

open access: yes, 2009
In this paper we deal with a nonlinear Schr\"{o}dinger equation with chaotic, random, and nonperiodic cubic nonlinearity. Our goal is to study the soliton evolution, with the strength of the nonlinearity perturbed in the space and time coordinates and to
Avelar, A. T.   +4 more
core   +1 more source

Forecasting South African grain prices and assessing the non-linear impact of inflation and rainfall using a dynamic Bayesian generalized additive model

open access: yesFrontiers in Applied Mathematics and Statistics
IntroductionAccurate price forecasts and the evaluation of some of the factors that affect the prices of grains are crucial for proper planning and food security.
Albert Antwi   +6 more
doaj   +1 more source

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