Results 51 to 60 of about 6,410,351 (366)

Fuzzy Relation Bilevel Optimization Model in the Wireless Communication Station System

open access: yesIEEE Access, 2020
In order to minimize the intensity of electromagnetic radiation, as well as the operation cost of the base stations in a wireless communication station system, we construct a bilevel programming problem with max-product fuzzy relation inequalities ...
Jianjun Qiu   +3 more
doaj   +1 more source

Price‐based unit commitment with decision‐dependent uncertainty in hourly demand

open access: yesIET Smart Grid, 2022
The price‐based unit commitment (PBUC) problem aims to optimise the power generating units' schedules to meet the system demand with the objective to maximise the generation companies' (GENCOs') profit.
Jinshun Su   +2 more
doaj   +1 more source

Inexact Restoration Methods for Semivectorial Bilevel Programming Problem on Riemannian Manifolds

open access: yesAxioms, 2022
For a better understanding of the bilevel programming on Riemannian manifolds, a semivectorial bilevel programming scheme is proposed in this paper. The semivectorial bilevel programming is firstly transformed into a single-level programming problem by ...
Jiagen Liao, Zhongping Wan
doaj   +1 more source

Generalized hp Pseudospectral-Convex Programming for Powered Descent and Landing

open access: yesJournal of Guidance Control and Dynamics, 2018
In this paper a generalized hp method is combined with pseudospectral methods and convex optimization to provide a high-accuracy, real-time capable method able to compute optimal trajectories for planetary powered descent and landing phases of a ...
Marco Sagliano
semanticscholar   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

open access: yesAdvanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato   +9 more
wiley   +1 more source

Economic Dispatch of Renewable Generators and BESS in DC Microgrids Using Second-Order Cone Optimization

open access: yesEnergies, 2020
A convex mathematical model based on second-order cone programming (SOCP) for the optimal operation in direct current microgrids (DCMGs) with high-level penetration of renewable energies and battery energy storage systems (BESSs) is developed in this ...
Walter Gil-González   +4 more
doaj   +1 more source

On the Convergence of Mirror Descent beyond Stochastic Convex Programming

open access: yesSIAM Journal on Optimization, 2017
In this paper, we examine the convergence of mirror descent in a class of stochastic optimization problems that are not necessarily convex (or even quasi-convex), and which we call variationally coherent.
Zhengyuan Zhou   +4 more
semanticscholar   +1 more source

Unbounded convex sets for non-convex mixed-integer quadratic programming [PDF]

open access: yes, 2014
This paper introduces a fundamental family of unbounded convex sets that arises in the context of non-convex mixed-integer quadratic programming.
Burer, Samuel, Letchford, Adam
core  

Using In Situ TEM to Understand the Surfaces of Electrocatalysts at Reaction Conditions: Single‐Atoms to Nanoparticles

open access: yesAdvanced Functional Materials, EarlyView.
This review summarizes recent advances in closed‐cell in situ TEM strategies for accurate determination of the activity and stability of single‐atom catalyst systems during operation. Operando conditions causing dynamic changes of SAC systems are highlighted and we explain why ensemble average‐based optical techniques may benefit from the technological
Martin Ek   +4 more
wiley   +1 more source

Curved Nanographene–Graphite Hybrid Anodes with Sequential Li+ Insertion for Fast‐Charging and Long‐Life Li‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A hybrid anode composed of Cl‐functionalized curved nanographene and graphite enables ultra‐fast charging and long cycle life through an engineered morphology and sequential Li+ insertion. It delivers 100 mAh g−1 at 5 C with 70% capacity retention after 1000 cycles and maintains stable performance over 2000 cycles in pouch cells, providing a practical ...
Hyunji Cha   +8 more
wiley   +1 more source

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