Fluid‐filled dynamic bowtie filter: Description and comparison with other modulators
Sign Up to like & getrecommendations! Published in 2019 at "Medical Physics"
DOI: 10.1002/mp.13272
Abstract: PURPOSE A dynamic bowtie filter can modulate flux along both fan and view angles for reduced patient dose, scatter, and required photon flux, which is especially important for photon counting detectors (PCDs). Among the proposed… read more here.
Keywords: attenuator; dynamic bowtie; count rate; filter ... See more keywords
Is our breathing optimal? Solving a piecewise linear model with constraints.
Sign Up to like & getrecommendations! Published in 2021 at "Journal of mathematical biology"
DOI: 10.1007/s00285-021-01661-8
Abstract: This paper is motivated by a question related to the control of amplitude and frequency of breathing. We present a simplified mathematical model, consisting of two piecewise linear ordinary differential equations, that could represent gas… read more here.
Keywords: solving piecewise; optimal solving; model; breathing optimal ... See more keywords
Nonlinear vibrations of a piecewise-linear quarter-car truck model by incremental harmonic balance method
Sign Up to like & getrecommendations! Published in 2018 at "Nonlinear Dynamics"
DOI: 10.1007/s11071-018-4157-6
Abstract: A two-degree-of-freedom (2DOF) quarter-car model with a piecewise leaf spring for the rear suspension of a truck is presented. A leaf spring, which contains a main leaf and an auxiliary leaf, can be regarded as… read more here.
Keywords: model; leaf spring; spring; quarter car ... See more keywords
A multiple focus-center-cycle bifurcation in 4D discontinuous piecewise linear memristor oscillators
Sign Up to like & getrecommendations! Published in 2018 at "Nonlinear Dynamics"
DOI: 10.1007/s11071-018-4541-2
Abstract: The dynamical richness of 4D memristor oscillators has been recently studied in several works, showing different regimes, from stable oscillations to chaos. Typically, only numerical simulations have been reported and so there is a lack… read more here.
Keywords: multiple focus; memristor oscillators; piecewise; piecewise linear ... See more keywords
On refinement strategies for solving $${\textsc {MINLP}\mathrm{s}}$$ by piecewise linear relaxations: a generalized red refinement
Sign Up to like & getrecommendations! Published in 2021 at "Optimization Letters"
DOI: 10.1007/s11590-021-01740-1
Abstract: We investigate the generalized red refinement for n-dimensional simplices that dates back to Freudenthal (Ann Math 43(3):580–582, 1942) in a mixed-integer nonlinear program ($${\textsc {MINLP}}$$ MINLP ) context. We show that the red refinement meets… read more here.
Keywords: linear relaxations; generalized red; minlp; textsc minlp ... See more keywords
On the Number of Limit Cycles in General Planar Piecewise Linear Differential Systems with Two Zones Having Two Real Equilibria
Sign Up to like & getrecommendations! Published in 2021 at "Qualitative Theory of Dynamical Systems"
DOI: 10.1007/s12346-020-00441-x
Abstract: A general family of planar piecewise linear ODEs with two zones both having a real focus and separated by a straight line is considered. By analyzing the number of zero points of a new function… read more here.
Keywords: planar piecewise; limit cycles; number; piecewise linear ... See more keywords
A Passive RFC (Reaction Force Compensation) Mechanism Using Adjustable Piecewise Linear Stiffness of Pre-Compressed Springs
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Precision Engineering and Manufacturing"
DOI: 10.1007/s12541-018-0155-3
Abstract: Nonlinear elements are used when a mechanical system has different performance requirements according to its positions. Piecewise linear system is widely used to investigate and to approximate nonlinear elements. So far, just springs with constant… read more here.
Keywords: passive rfc; compressed springs; pre compressed; mechanism using ... See more keywords
Piecewise Linear Vector Optimization Problems on Locally Convex Hausdorff Topological Vector Spaces
Sign Up to like & getrecommendations! Published in 2017 at "Acta Mathematica Vietnamica"
DOI: 10.1007/s40306-017-0239-7
Abstract: Piecewise linear vector optimization problems in the locally convex Hausdorff topological vector space setting are considered in this paper. The efficient solution set of these problems are shown to be the unions of finitely many… read more here.
Keywords: vector; problems locally; linear vector; optimization problems ... See more keywords
Piecewise-linear criterion functions in oblique survival tree induction
Sign Up to like & getrecommendations! Published in 2017 at "Artificial intelligence in medicine"
DOI: 10.1016/j.artmed.2016.12.004
Abstract: OBJECTIVE Recursive partitioning is a common, assumption-free method of survival data analysis. It focuses mainly on univariate trees, which use splits based on a single variable in each internal node. In this paper, I provide… read more here.
Keywords: linear criterion; criterion; tree; tree induction ... See more keywords
A large margin piecewise linear classifier with fusion of deep features in the diagnosis of COVID-19
Sign Up to like & getrecommendations! Published in 2021 at "Computers in Biology and Medicine"
DOI: 10.1016/j.compbiomed.2021.104927
Abstract: The world has experienced epidemics of coronavirus infections several times over the last two decades. Recent studies have shown that using medical imaging techniques can be useful in developing an automatic computer-aided diagnosis system to… read more here.
Keywords: large margin; margin piecewise; linear classifier; deep features ... See more keywords
g-function generation using a piecewise-linear profile applied to ground heat exchangers
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Heat and Mass Transfer"
DOI: 10.1016/j.ijheatmasstransfer.2017.08.051
Abstract: Abstract In the context of geothermal applications, the thermal response of the ground is a primary concern. Many models use the concept of g-function introduced by Eskilson in the eighties. These functions were associated with… read more here.
Keywords: ground; function generation; using piecewise; heat ... See more keywords