Results 11 to 20 of about 2,867,234 (274)
A hybrid symbolic-numerical approach to the center-focus problem
Journal of Symbolic Computation, 2017 We propose a new hybrid symbolic-numerical approach to the center-focus problem. The method allowed us to obtain center conditions for a three-dimensional system of differential equations, which was previously not possible using traditional, purely symbolic computational techniques.
Mahdi, Adam +2 more
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Georgia Educational Researcher, 2021 Many college students struggle with technical difficulties when enrolled in an online or hybrid class. Sometimes students do not even have a choice about online options, such as in the COVID-19 era, when the shift to remote instruction has happened and ...
Lisa McNeal, Jennifer Gray
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Centers: their integrability and relations with the divergence [PDF]
, 2016 This is a brief survey on the centers of the analytic differential systems in R^2. First we consider the kind of integrability of the different types of centers, and after we analyze the focus--center problem, i.e.
Llibre, Jaume
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IDENTIFIKASI PUSAT PERTUMBUHAN DAN DAERAH HINTERLAND KOTA PALEMBANG
Jurnal Ekonomi Pembangunan, 2013 Many reason had been delivered for split policy implementation on a region. Started from economic growth does not appear everywhere and all at once; it appear in points or development poles with variable intensities.
Imelda Imelda
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Center-focus and isochronous center problems for discontinuous differential equations
Discrete and Continuous Dynamical Systems, 2000 The authors study planar systems with a line of discontinuities. They use a geometrical proof to show a relation between the order of degeneracy of the critical point (\((m,k)\)-monodromic point) of the discontinuous differential equations and the degeneracy of the associated two smooth component differential equations.
Coll, B., Gasull, A., Prohens, R.
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Effective retrieval and new indexing method for case based reasoning: Application in chemical process design [PDF]
, 2010 In this paper we try to improve the retrieval step for case based reasoning for preliminary design. This improvement deals with three major parts of our CBR system.
Le Lann, Jean-Marc +2 more
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A Metaheuristic for the Containership Feeder Routing Problem with Port Choice Process
Asian Journal of Shipping and Logistics, 2018 In this paper, we focus on understanding the joint problem of container ship route generation and consolidation center selection, two important sub-problems influencing the effectiveness of the liners shipping industry, which addresses the ship-routing ...
Mohammad Vaferi +2 more
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Model for route planning of freight buses [PDF]
SHS Web of ConferencesThis paper introduces freight buses as a novel solution for city logistics, aiming to replace other freighters currently operated by various private logistics firms within city centers.
Zheng Chang +4 more
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Modeling left-truncated and right-censored survival data with longitudinal covariates [PDF]
, 2012 There is a surge in medical follow-up studies that include longitudinal covariates in the modeling of survival data. So far, the focus has been largely on right-censored survival data.
Su, Yu-Ru, Wang, Jane-Ling
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Existence of Center for Planar Differential Systems with Impulsive Perturbations
Advances in Mathematical Physics, 2015 We present a method that uses successor functions in ordinary differential systems to address the “center-focus” problem of a class of planar systems that have an impulsive perturbation.
Dengguo Xu
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