Results 21 to 30 of about 395,580 (223)
Application of the ARCH model to sales forecasting, a business approach
Revista de la Facultad de Ciencias Económicas, 2022 El mundo de los negocios implica que las empresas estén preparadas para asumir los retos del futuro, para ello se ha realizado un análisis de la serie temporal de una empresa y mediante su comportamiento volátil fue necesario la aplicación de un modelo ...
Hólguer Rodrigo Altamirano Pérez +3 more
doaj +1 more source
Arches and contact forces in a granular pile [PDF]
Eur. Phys. J. E 35, 44 (2012), 2011 Assemblies of granular particles mechanically stable under their own weight contain arches. These are structural units identified as sets of mutually stable grains. It is generally assumed that these arches shield the weight above them and should bear most of the stress in the system.
arxiv +1 more source
Evolution of an arched magnetized laboratory plasma in a sheared magnetic field [PDF]
, 2020 Arched magnetized structures are a common occurrence in space and laboratory plasmas. Results from a laboratory experiment on spatio-temporal evolution of an arched magnetized plasma ($\beta \approx 10^{-3}$, Lundquist number $\approx 10^{4}$, plasma radius/ion gyroradius $\approx 20$) in a sheared magnetic configuration are presented.
arxiv +1 more source
Restoration of Damaged Masonry Vaulted Ceilings of Buildings
Железобетонные конструкции, 2023 In this article, the authors present the results of a study of unreinforced and reinforced stone vaulted ceilings, which included numerical and physical experiments.
Evgeny V. Khorkov, Ilshat T. Mirsaypov
doaj +1 more source
A signed power transformation with application to white noise testing [PDF]
arXiv, 2021 We show that signed power transforms of some ARCH-type processes give ARCH-type processes. The class of ARCH-type models for which this property holds contains many common ARCH and GARCH models. The results can be useful in testing for white noise when fourth moments don't exist and detecting white noise that is not ARCH-type.
arxiv
Statistical inference for time-varying ARCH processes [PDF]
Annals of Statistics 2006, Vol. 34, No. 3, 1075-1114, 2006 In this paper the class of ARCH$(\infty)$ models is generalized to the nonstationary class of ARCH$(\infty)$ models with time-varying coefficients. For fixed time points, a stationary approximation is given leading to the notation ``locally stationary ARCH$(\infty)$ process.'' The asymptotic properties of weighted quasi-likelihood estimators of time ...
arxiv +1 more source
Optimal Design of Elastic Circular Plane Arches
Frontiers in Built Environment, 2020 Arches represent a structural system adopted in construction practice for thousand years, and they are still widely adopted if large spans have to be covered. The structural efficiency of arches principally depends on the minimization of the eccentricity
Francesco Trentadue +4 more
doaj +1 more source
FEATURES OF DESIGN OF TIED-ARCH BRIDGES WITH FLEXIBLE INCLINED SUSPENSION HANGERS
Nauka ta progres transportu, 2017 Purpose. Investigation and analysis of the hanger arrangement and the structural stability of a Network arch bridge – a tied-arch bridge with inclined hangers that cross each other at least twice.
V. O. Samosvat +3 more
doaj +1 more source
Natural vibrations of circular nano-arches of piecewise constant thickness [PDF]
arXiv, 2023 The free vibrations of elastic circular arches made of a nano-material are considered. A method of determination of eigenfrequencies of nano-arches weakened with stable cracks is developed making use of the concept of the massless spring and Eringen's nonlocal theory of elasticity. The aim of the paper is to evaluate the sensitivity of eigenfrequencies
arxiv
Journal of Chest Surgery, 2021 An 87-year-old man presented with a saccular aneurysm at the proximal descending thoracic aorta. As computed tomography revealed a shaggy aorta, we planned hybrid thoracic endovascular aortic repair (TEVAR) with embolic protection devices (EPDs) in ...
Eun Chae Kim +6 more
doaj +1 more source