Results 11 to 20 of about 2,878,986 (275)
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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Core formation from self-heating dark matter [PDF]
, 2018 Cosmological simulations of the $\Lambda$CDM model suggest that the dark matter halos of dwarf galaxies are denser in their center than what observational data of such galaxies imply.
Chu, Xiaoyong, Garcia-Cely, Camilo
core +2 more sources
Workshops on Real World Writing Genres: Writing, Career, and the Trouble with Contemporary Genre Theory [PDF]
, 2018 My article reports on an annual series of workshops I launched as director of my writing center. This ongoing initiative, titled Workshops on Real World Writing Genres, aims to introduce undergraduates to genres they will practice in their prospective ...
Plotnick, Jerry
core +1 more source
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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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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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
doaj +1 more source
Non-smooth quadratic centers defined in two arbitrary sectors [PDF]
, 2016 In this paper we analyze the center-focus problem of some families of piecewise planar quadratic vector fields on two zones of R2. The zones we consider are two unbounded sectors defined by an arbitrary angle α and a fixed vertex.
García, I. A. (Isaac A.)
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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
doaj +1 more source
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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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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