Results 21 to 30 of about 33,460 (204)

Variational density matrix optimization using semidefinite programming [PDF]

open access: yes, 2011
We discuss how semidefinite programming can be used to determine the second-order density matrix directly through a variational optimization. We show how the problem of characterizing a physical or N -representable density matrix leads to matrix ...
Boyd   +22 more
core   +2 more sources

On the Embed and Project Algorithm for the Graph Bandwidth Problem

open access: yesMathematics, 2021
The graph bandwidth problem, where one looks for a labeling of graph vertices that gives the minimum difference between the labels over all edges, is a classical NP-hard problem that has drawn a lot of attention in recent decades. In this paper, we focus
Janez Povh
doaj   +1 more source

Distributionally Robust Joint Chance Constrained Problem under Moment Uncertainty

open access: yesJournal of Applied Mathematics, 2014
We discuss and develop the convex approximation for robust joint chance constraints under uncertainty of first- and second-order moments. Robust chance constraints are approximated by Worst-Case CVaR constraints which can be reformulated by a ...
Ke-wei Ding
doaj   +1 more source

Critical Multipliers in Semidefinite Programming [PDF]

open access: yesAsia-Pacific Journal of Operational Research, 2020
It was proved in Izmailov and Solodov (2014). Newton-Type Methods for Optimization and Variational Problems, Springer] that the existence of a noncritical multiplier for a (smooth) nonlinear programming problem is equivalent to an error bound condition for the Karush–Kuhn–Thcker (KKT) system without any assumptions.
Zhang, Tianyu, Zhang, Liwei
openaire   +3 more sources

A Rank-Two Feasible Direction Algorithm for the Binary Quadratic Programming

open access: yesJournal of Applied Mathematics, 2013
Based on the semidefinite programming relaxation of the binary quadratic programming, a rank-two feasible direction algorithm is presented. The proposed algorithm restricts the rank of matrix variable to be two in the semidefinite programming relaxation ...
Xuewen Mu, Yaling Zhang
doaj   +1 more source

Variational Quantum Algorithms for Semidefinite Programming [PDF]

open access: yesQuantum
A semidefinite program (SDP) is a particular kind of convex optimization problem with applications in operations research, combinatorial optimization, quantum information science, and beyond.
Dhrumil Patel   +2 more
doaj   +1 more source

Efficient Convex Optimization for Energy-Based Acoustic Sensor Self-Localization and Source Localization in Sensor Networks

open access: yesSensors, 2018
The energy reading has been an efficient and attractive measure for collaborative acoustic source localization in practical application due to its cost saving in both energy and computation capability.
Yongsheng Yan   +4 more
doaj   +1 more source

Multipath Exploitation with Time Reversal Waveform Covariance Matrix for SNR Maximization

open access: yesRemote Sensing, 2020
Radar target detection has a wide range of applications in the military and civilian remote sensing fields; in particular, the target detection in multipath environments has attracted many scholars’ attention in recent years.
Chao Xiong, Chongyi Fan, Xiaotao Huang
doaj   +1 more source

Exposed faces of semidefinitely representable sets

open access: yes, 2009
A linear matrix inequality (LMI) is a condition stating that a symmetric matrix whose entries are affine linear combinations of variables is positive semidefinite.
Netzer, Tim   +2 more
core   +1 more source

Semidefinite Programming Algorithms for 3-D AOA-Based Hybrid Localization

open access: yesIEEE Open Journal of Signal Processing, 2023
By taking different kinds of measurements at the same time, it may be possible to improve the accuracy of target localization or reduce the number of sensors needed.
Yanbin Zou
doaj   +1 more source

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