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SLA-Aware and Energy-Efficient VM Consolidation in Cloud Data Centers Using Robust Linear Regression Prediction Model

open access: yesIEEE Access, 2019
Virtual machine (VM) consolidation provides a promising approach to save energy and to improve resource utilization in data centers. However, the aggressive consolidation of virtual machines may lead to service-level agreements (SLA) violation, which is ...
Lianpeng Li   +3 more
doaj   +4 more sources

Limit cycles created by piecewise linear centers [PDF]

open access: yesChaos: An Interdisciplinary Journal of Nonlinear Science, 2019
In the last few years, the interest for studying the piecewise linear differential systems has increased strongly, mainly due to their applications to many physical phenomena. In the study of these differential systems, the limit cycles play a main role.
Jaume Llibre, Xiang Zhang
openaire   +6 more sources

Crossing limit cycles for a class of piecewise linear differential centers separated by a conic

open access: yesElectronic Journal of Differential Equations, 2020
In previous years the study of the version of Hilbert's 16th problem for piecewise linear differential systems in the plane has increased. There are many papers studying the maximum number of crossing limit cycles when the differential system is ...
Johana Jimenez   +2 more
doaj   +2 more sources

Linear Power Modeling for Cloud Data Centers: Taxonomy, Locally Corrected Linear Regression, Simulation Framework and Evaluation

open access: yesIEEE Access, 2019
Cloud computing is a novel paradigm, where the limitations of ubiquitous connected devices in terms of computing, data access, networking and storage are solved through the use of cloud infrastructure. The pervasive adoption of cloud computing results in
Leila Ismail, Eyad H. Abed
doaj   +2 more sources

CT Morphometric Analysis of Ossification Centres in the Fetal Th12 Vertebra [PDF]

open access: yesBrain Sciences
Objectives: The present study aimed to determine the growth dynamics of the ossification centers of the twelfth thoracic vertebra in the human fetus, focusing on detailed linear, surface, and volumetric parameters of both the vertebral body and neural ...
Magdalena Grzonkowska   +8 more
doaj   +2 more sources

Relative Chebyshev centers in normed linear spaces, I

open access: yesJournal of Approximation Theory, 1980
AbstractLet E be a normed linear space, A a bounded set in E, and G an arbitrary set in E. The relative Chebyshev center of A in G is the set of points in G best approximating A. We have obtained elsewhere general results characterizing the spaces in which the center reduces to a singleton in terms of structural properties related to uniform and strict
Amir, Dan, Ziegler, Zvi
openaire   +3 more sources

Isochronous centers of a linear center perturbed by fourth degree homogeneous polynomial

open access: yesBulletin des Sciences Mathématiques, 1999
The authors study plane time-reversible differential systems of the type \(\dot x= -y+ X_5(x,y)\), \(\dot y= x+ Y_5(x,y)\), where \(X_5\), \(Y_5\) are homogeneous polynomials of degree 5. They look for necessary and sufficient conditions for the origin to be an isochronous center.
Chavarriga, J., Giné, J., García, I.A.
openaire   +3 more sources

Piecewise linear perturbations of a linear center

open access: yesDiscrete & Continuous Dynamical Systems - A, 2021
Agraïments: The first author is supported by FAPESP-BRAZIL grant 2007/06896-5 and CAPES-PROCAD-BRAZIL grant 035/2007. The second author is supported by FAPESP-Brazil Project 2011/13152-8 and by Programa Primeiros Projetos-PROPe/UNESP. The first and the third authors are also supported by the joint project CAPES-MECD grant PHB-2009-0025-PC This paper is
Buzzi, Claudio   +2 more
openaire   +7 more sources

Limit cycles of discontinuous piecewise differential systems formed by linear centers in R2 and separated by two circles

open access: yesNonlinear Analysis: Real World Applications, 2021
We show that discontinuous planar piecewise differential systems formed by linear centers and separated by two concentric circles can have at most three limit cycles.
Maria Elisa Anacleto   +3 more
semanticscholar   +1 more source

Limit cycles of discontinuous piecewise linear differential systems formed by centers or Hamiltonian without equilibria separated by irreducible cubics

open access: yesMoroccan Journal of Pure and Applied Analysis, 2021
The main goal of this paper is to provide the maximum number of crossing limit cycles of two different families of discontinuous piecewise linear differential systems.
Damene Loubna, Benterki Rebiha
doaj   +1 more source

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