Results 21 to 30 of about 62,890 (222)

Variational approach to relaxed topological optimization: closed form solutions for structural problems in a sequential pseudo-time framework [PDF]

open access: yes, 2019
The work explores a specific scenario for structural computational optimization based on the following elements: (a) a relaxed optimization setting considering the ersatz (bi-material) approximation, (b) a treatment based on a non-smoothed characteristic
Cante Terán, Juan Carlos   +3 more
core   +1 more source

Exploiting the Clustered Sparsity for Channel Estimation in Hybrid Analog-Digital Massive MIMO Systems

open access: yesIEEE Access, 2019
Although the hybrid analog–digital processing reduces the hardware complexity to realize massive multiple-input multiple-output system, it increases the difficulty of channel estimation significantly since the base station cannot obtain enough ...
Yurong Wang   +3 more
doaj   +1 more source

Single-step deep reinforcement learning for two- and three-dimensional optimal shape design

open access: yesAIP Advances, 2022
This research gauges the capabilities of deep reinforcement learning (DRL) techniques for direct optimal shape design in computational fluid dynamics (CFD) systems.
H. Ghraieb   +4 more
doaj   +1 more source

Optimal micropatterns in 2D transport networks and their relation to image inpainting

open access: yes, 2016
We consider two different variational models of transport networks, the so-called branched transport problem and the urban planning problem. Based on a novel relation to Mumford-Shah image inpainting and techniques developed in that field, we show for a ...
Brancolini, Alessio   +2 more
core   +1 more source

Differentiable Programming Tensor Networks

open access: yesPhysical Review X, 2019
Differentiable programming is a fresh programming paradigm which composes parameterized algorithmic components and optimizes them using gradient search. The concept emerges from deep learning but is not limited to training neural networks. We present the
Hai-Jun Liao   +3 more
doaj   +1 more source

Optics Temperature-Dependent Nonuniformity Correction Via $\ell _{0}$-Regularized Prior for Airborne Infrared Imaging Systems

open access: yesIEEE Photonics Journal, 2016
In this paper, we propose a new $\ell _{0}$ -regularized approach to remove the temperature-dependent nonuniformity effects induced by the infrared (IR) imaging optics in an aerothermal environment.
Li Liu, Tianxu Zhang
doaj   +1 more source

Variational matrix product state approach to quantum impurity models [PDF]

open access: yes, 2008
We present a unified framework for renormalization group methods, including Wilson's numerical renormalization group (NRG) and White's density-matrix renormalization group (DMRG), within the language of matrix product states.
Cirac, J. I.   +4 more
core   +2 more sources

Distributionally Robust Variational Quantum Algorithms With Shifted Noise

open access: yesIEEE Transactions on Quantum Engineering
Given their potential to demonstrate near-term quantum advantage, variational quantum algorithms (VQAs) have been extensively studied. Although numerous techniques have been developed for VQA parameter optimization, it remains a significant challenge.
Zichang He   +3 more
doaj   +1 more source

Variational Monte Carlo with the Multi-Scale Entanglement Renormalization Ansatz [PDF]

open access: yes, 2012
Monte Carlo sampling techniques have been proposed as a strategy to reduce the computational cost of contractions in tensor network approaches to solving many-body systems.
Ferris, Andrew J., Vidal, Guifre
core   +2 more sources

Discrete mechanics and optimal control: An analysis [PDF]

open access: yes, 2009
The optimal control of a mechanical system is of crucial importance in many application areas. Typical examples are the determination of a time-minimal path in vehicle dynamics, a minimal energy trajectory in space mission design, or optimal motion ...
Junge, Oliver   +2 more
core   +3 more sources

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