Results 21 to 30 of about 8,002,154 (311)
Suppression of period doubling chetter in high-speed milling by spindle speed variation [PDF]
, 2011 Spindle speed variation is a well known technique to suppress regenerative machine tool vibra- tions, but it is usually considered to be effective only for low spindle speeds.
Arnaud, Lionel +9 more
core +1 more source
A note on almost periodic variational equations [PDF]
Communications on Pure and Applied Analysis, 2011 The variational equation of a nonautonomous differential equation (x) over dot = F(t, x) along a solution mu is given by (x) over dot = DxF(t, mu(t))x. We consider the question whether the variational equation is almost periodic provided that the original equation is almost periodic by a discussion of the following problem: Is the derivative DxF almost
Giesl, Peter, Rasmussen, Martin
openaire +1 more source
Aspects of Linguistic Variation [PDF]
, 2018 This volume brings together papers on linguistic variation. It takes a broad perspective, covering not only crosslinguistic and diachronic but also intralinguistic and interspeaker variation, and examines phenomena ranging from negation and TAM over ...
core +1 more source
Variation in dosimeter calibration factor (Ndw) over a period of 20 years
Journal of Medical Physics, 2021 Long delays in renewal of calibration of secondary standards radiation dosimeters in radiation oncology centers due to the COVID19 pandemic have aroused concerns regarding accuracy in dose delivery to patients.
Manoj Kumar Semwal +4 more
doaj +1 more source
Permutation entropy variation for 2007 effusive dome-forming eruption period of Kelud Volcano, Indonesia [PDF]
E3S Web of Conferences, 2021 The complexity of a system recorded in time series data can be measured statistically using permutation entropy (PE). The state of a system (e.g. regular, chaotic, random, etc.) that underlies the appearance of variations in time series can be determined
Nugraheni Lusia Rita +3 more
doaj +1 more source
Variational Calculation of the Period of Nonlinear Oscillators [PDF]
Journal of Statistical Physics, 2004 The problem of calculating the period of second order nonlinear autonomous oscillators is formulated as an eigenvalue problem. We show that the period can be obtained from two integral variational principles dual to each other. Upper and lower bounds on the period can be obtained to any desired degree of accuracy.
Benguria Donoso, Rafael +1 more
openaire +7 more sources
Reflexivity in Meadow Mari: Binding and Agree [PDF]
, 2017 According to the Canonical Binding Theory (Chomsky 1981), anaphors must be bound in their local domain and pronominals must be free. The discovery of “long-distance anaphors” (e.g.
Volkova, Anna, ILS Variation
core +2 more sources
"Variación sintáctica en las construcciones pasivas: las preposiciones introductoras del agente" [PDF]
, 2015 El presente trabajo constituye un estudio diacrónico acerca de la pérdida de la preposición de como introductora del complemento agente y la subsiguiente propagación de la preposición por en construcciones pasivas perifrásticas con ser.
Nieuwenhuijsen, Dorien, ILS Variation
core +1 more source
The Acquisition of Stylistic Variation by Jakarta Indonesian Children [PDF]
, 2014 To become competent speakers in their community, children have to learn the grammatical rules and lexicon of one or more language varieties. In addition, they need to learn when to use these varieties and to adapt their speech to both topic and setting ...
Bernadette Kushartanti +7 more
core +2 more sources
Ecological Indicators, 2021 The Shiyang River Basin is a typical arid watershed in Northwest China. Scientific understanding of the driving mechanism of runoff change is the basis of scientific utilization of water resources and regional sustainable development.
Dongxiang Xue +7 more
doaj +1 more source