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   Articles with "convex concave" as a keyword



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Globally minimizing the sum of a convex–concave fraction and a convex function based on wave-curve bounds

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recommendations! Published in 2020 at "Journal of Global Optimization"

DOI: 10.1007/s10898-019-00870-2

Abstract: We consider the problem of minimizing the sum of a convex–concave function and a convex function over a convex set (SFC). It can be reformulated as a univariate minimization problem, where the objective function is… read more here.

Keywords: convex concave; sum convex; convex; curve bounds ... See more keywords
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A novel Arcs-based discrete element modeling of arbitrary convex and concave 2D particles

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recommendations! Published in 2021 at "Computer Methods in Applied Mechanics and Engineering"

DOI: 10.1016/j.cma.2021.114071

Abstract: Abstract This study presents a novel Arcs-based discrete element method (ArcDEM) for efficient simulation of realistic granules with arbitrary convex and concave 2D particle outlines. In the proposed ArcDEM, a series of computational geometry algorithms… read more here.

Keywords: convex concave; novel arcs; arcs based; based discrete ... See more keywords

Finite element analysis of low-velocity impact response of convex and concave composite laminated shells

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recommendations! Published in 2018 at "Composite Structures"

DOI: 10.1016/j.compstruct.2017.11.090

Abstract: Abstract The transient response of composite laminated cylindrical shells with convex and concave shapes, subjected to low-velocity impact, was numerically investigated. Geometrically linear analysis without consideration of the membrane effect demonstrated the same contact force… read more here.

Keywords: convex concave; response; composite laminated; low velocity ... See more keywords

Vortex-dipole impingement with convex and concave boundaries

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recommendations! Published in 2024 at "Physics of Fluids"

DOI: 10.1063/5.0200035

Abstract: The vortex-dipole interactions with convex and concave boundaries in a two-dimensional domain are analyzed using the Bhatnagar–Gross–Krook (BGK) collision-based lattice Boltzmann method (LBM). The formation and detachment of the boundary layers at the flat wall… read more here.

Keywords: concave boundaries; vorticity; convex concave; dipole interactions ... See more keywords

Inertial primal-dual dynamics with Hessian-driven damping and Tikhonov regularization for convex-concave bilinear saddle point problems

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recommendations! Published in 2024 at "Optimization"

DOI: 10.1080/02331934.2025.2578403

Abstract: This paper deals with a second-order primal-dual dynamical system with Hessian-driven damping and Tikhonov regularization terms in connection with a convex-concave bilinear saddle point problem. We first obtain a fast convergence rate of the primal-dual… read more here.

Keywords: tikhonov regularization; damping tikhonov; primal dual; convex concave ... See more keywords

Real-Time NMPC With Convex–Concave Constraints and Application to Eco-Driving

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recommendations! Published in 2025 at "IEEE Transactions on Control Systems Technology"

DOI: 10.1109/tcst.2024.3494993

Abstract: In this brief, we propose a novel real-time numerical algorithm for solving nonlinear model predictive control (NMPC) with convex-concave constraints, which arise in various practical applications. Instead of requiring full convergence for each problem at… read more here.

Keywords: convex; real time; time; nmpc convex ... See more keywords

Clinical and radiographic peri-implant tissue changes for implants restored with convex or concave abutment shapes: A 3-year randomized controlled trial.

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recommendations! Published in 2023 at "Clinical oral implants research"

DOI: 10.1111/clr.14077

Abstract: OBJECTIVES The aim was to evaluate peri-implant tissue levels over a 3-year period for implants connected to either convex or concave final abutments at the time of implant placement. MATERIALS AND METHODS In this randomized,… read more here.

Keywords: convex concave; abutment; group; peri implant ... See more keywords
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Fractional Hermite–Hadamard inequalities for (s,m)$(s,m)$-convex or s-concave functions

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recommendations! Published in 2018 at "Journal of Inequalities and Applications"

DOI: 10.1186/s13660-018-1829-1

Abstract: In this article, fractional integral is considered. Some new upper bounds of the distance between the middle and left of Hermite–Hadamard type inequalities for fractional integrals are established for (s,m)$(s,m)$-convex or s-concave functions. read more here.

Keywords: convex concave; fractional hermite; hadamard inequalities; hermite hadamard ... See more keywords

Convex and Concave Model 3D Printing for Designing Right-side Bronchial Blocker for Infants

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recommendations! Published in 2022 at "International Journal of Bioprinting"

DOI: 10.18063/ijb.v8i3.555

Abstract: It is technically challenging for pediatric anesthesiologists to use bronchial blocker (BB) to isolate the lungs of infants during thoracoscopic surgery. Further, BB currently sold in the market cannot match the anatomical characteristics of the… read more here.

Keywords: convex concave; concave model; bronchial blocker; blocker ... See more keywords

Assessment of Surface Texture Bounded by Convex and Concave Parabolic Segments

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recommendations! Published in 2020 at "Russian Engineering Research"

DOI: 10.3103/s1068798x20110052

Abstract: Formulas for the probability of filling of surface texture bounded by convex and concave parabolic segments are derived on the basis of geometric and mathematical modeling. The probability characteristics are calculated and compared for the… read more here.

Keywords: convex concave; texture bounded; surface texture; bounded convex ... See more keywords

Wind-Driven Dynamics Around Building Clusters: Impact of Convex and Concave Curvilinear Morphologies and Central Angles

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recommendations! Published in 2024 at "Atmosphere"

DOI: 10.3390/atmos15121454

Abstract: Curvilinear building forms are increasingly common in modern architecture, yet their impact on wind dynamics remains understudied. This research examines the wind flow behavior around high-rise residential building rows configured with convex and concave curvilinear… read more here.

Keywords: building clusters; driven dynamics; wind driven; convex concave ... See more keywords