Results 31 to 40 of about 407,904 (307)

Quadratic bimodules and quadratic orders

Journal of Algebra, 2005
Many problems of representation theory are related or can be reduced to bimodule problems. Roiter has shown that in its most general (categorical) sense, the concept of bimodule (bocs) is most universal in representation theory. In the present article, quadratic extensions of rings and categories are introduced and studied, and it is shown that these ...
openaire   +2 more sources

Quadratic Liénard Equations with Quadratic Damping

Journal of Differential Equations, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dumortier, F., Li, C.
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Quadratic Irrationals, Quadratic Ideals And Indefinite Quadratic Forms Ii

, 2009
{"references": ["R.A. Mollin. Quadratics. CRS Press, Boca Raton, New York, London,\nTokyo, 1996.", "R.A. Mollin and K. Cheng. Palindromy and Ambiguous Ideals Revisited.\nJournal of Number Theory 74(1999), 98-110.", "R.A. Mollin. Jocabi symbols, ambiguous ideals, and continued fractions.\nActa Arith. 85(1998), 331-349.", "R.A. Mollin. A survey of Jocabi
TEKCAN, AHMET, ÖZKOÇ, ARZU
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Quadratic Convex Reformulations for Semicontinuous Quadratic Programming [PDF]

SIAM Journal on Optimization, 2017
Summary: We consider in this paper a class of semicontinuous quadratic programming problems, which arises in many real-world applications such as production planning, portfolio selection, and subset selection in regression. We build upon the idea of the quadratic convex reformulation approach, i.e., adding to the original objective function an ...
Baiyi Wu, Xiaoling Sun 0001, Duan Li 0002, Xiaojin Zheng   +3 more
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An Improved Quadratic Boost Converter With Lower Input Current Ripple and Reduced Power Components for Fuel Cell Systems

IEEE Access
This paper presents an improved quadratic boost converter designed to achieve lower input current ripple and reduce the number of power components, specifically for fuel cell systems.
Yuan Zhu, Kazuhiro Ohyama
doaj   +1 more source

The birational composition of arbitrary quadratic form with binary quadratic form

Журнал Белорусского государственного университета: Математика, информатика, 2022
Let f(X) and g(Y) be nondegenerate quadratic forms of dimensions m and n respectively over a field K, charK ≠ 2. Herein, the problem of the birational composition of f(X) and g(Y) is considered, namely, the condition is established when the product f(X)g(
Alexandr A. Bondarenko
doaj   +1 more source

Stage‐Dependent β‐Synuclein Links MRI and Cognitive Decline in Alzheimer's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Synaptic degeneration drives cognitive decline in Alzheimer's disease (AD), but synaptic biomarkers are scarce. Brain‐enriched β‐synuclein emerged as a synaptic damage marker. We investigated its diagnostic, prognostic, and structural correlates across the AD continuum.
Ulaş Ay, Merve Alaylioglu, Erdi Sahin, Sanem Sultan Yoruk Oner, Gulce Iskan, Gulce Cosku Yilmaz Cakan, Gozde Kizilates‐Evin, Emre Hari, Elif Kurt, Erdinc Dursun, Basar Bilgic, Hasmet Hanagasi, Hakan Gurvit, Tamer Demiralp, Duygu Gezen‐Ak, Bedia Samanci   +15 more
wiley   +1 more source

Quiescent Optical Solitons with Quadratic-Cubic and Generalized Quadratic-Cubic Nonlinearities

Telecom, 2023
This paper studies the formulation of dark and singular stationary optical solitons that stem from quadratic-cubic and generalized quadratic-cubic forms of nonlinear refractive index coupled with nonlinear chromatic dispersion.
Ahmed H. Arnous, Anjan Biswas, Yakup Yıldırım, Luminita Moraru, Simona Moldovanu, Catalina Iticescu, Salam Khan, Hashim M. Alshehri   +7 more
doaj   +1 more source

Quadratic Zonotopes:An extension of Zonotopes to Quadratic Arithmetics

CoRR, 2014
Affine forms are a common way to represent convex sets of $\mathbb{R}$ using a base of error terms $ε\in [-1, 1]^m$. Quadratic forms are an extension of affine forms enabling the use of quadratic error terms $ε_i ε_j$. In static analysis, the zonotope domain, a relational abstract domain based on affine forms has been used in a wide set of settings, e ...
Assalé, Adjé, Garoche, Pierre-Loïc, Werey, Alexis   +2 more
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Biopsychosocial Determinants of Hand Function and Its Trajectories Over Five Years in Patients With Hand Osteoarthritis

Arthritis Care &Research, EarlyView.
Objective This study aimed to investigate hand function trajectories over five years in primary hand osteoarthritis (OA). Additionally, determinants of baseline and longitudinal hand function were assessed. Methods A total of 538 patients with both baseline and five‐year study visits were analyzed.
Annemiek V. E. M. Olde Meule, Coen van der Meulen, Jos Runhaar, Frits R. Rosendaal, Margreet Kloppenburg   +4 more
wiley   +1 more source