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- U. Malik, Imad M. Jaimoukha, George D. Halikias, S. K. Gungah
- Math. Program.
- 2006

Consider the semidefinite relaxation (SDR) of the quadratic integer program (QIP): γ := max {xT Qx : x ∈ {−1, 1}n} ≤ min {trace(D) : D − Q 0} =: γ̄ where Q is a given symmetric matrix and D is… (More)

- Nicos Karcanias, S. Fatouros, Marilena Mitrouli, George D. Halikias
- Computers & Mathematics with Applications
- 2006

The computation of the Greatest Common Divisor (GCD) of many polynomials is a nongeneric problem. Techniques defining “approximate GCD” solutions have been defined, but the proper definition of the… (More)

- Nicos Karcanias, George D. Halikias, A. Papageorgiou
- 2007 European Control Conference (ECC)
- 2007

The concept of “strong stability” of LTI systems is introduced. This is a stronger notion of stability compared to alternative definitions, which allows the analysis and design of control systems… (More)

- George D. Halikias, Imad M. Jaimoukha, U. Malik, S. K. Gungah
- J. Global Optimization
- 2007

We consider the maximization γ = max{xTAx : x ∈ {−1, 1}n} for a given symmetric A ∈ Rn×n . It was shown recently, using properties of zonotopes and hyperplane arrangements, that in the special case… (More)

- George D. Halikias, A. Papageorgiou, Nicos Karcanias
- Int. J. Control
- 2010

The concept of “strong stability” of LTI systems has been introduced in a recent paper [KHP2]. This is a stronger notion of stability compared to alternative definitions (e.g. stability in the sense… (More)

- Argyrios C. Zolotas, George D. Halikias
- ArXiv
- 2012

An optimisation algorithm is proposed for designing PID controllers, which minimises the asymptotic open-loop gain of a system, subject to appropriate robuststability and performance QFT constraints.… (More)

- S. K. Gungah, George D. Halikias, Imad M. Jaimoukha
- SIAM J. Control and Optimization
- 2000

The set of all optimal controllers which maximize a robust stability radius for unstructured additive perturbations may be obtained using standard Hankel-norm approximation methods. These controllers… (More)

- Christos I. Papanagnou, George D. Halikias
- Int. J. Systems Science
- 2008

A novel state-space model of a multi-node supply chain is presented, controlled via local proportional inventory-replenishment policies. The model is driven by a stochastic sequence representing… (More)

- Argyrios C. Zolotas, George D. Halikias, Roger M. Goodall, Jun Wang
- 2006 American Control Conference
- 2006

The paper studies the utilisation of model reduction techniques, both physical-based and mathematical-based, in designing simplified LQG optimal tilt controllers to improve the curving performance of… (More)

The aim of this study is to investigate motion in the horizontal and the vertical planes of a single-link flexible manipulator. The manipulator is modelled including gravity terms, and it is verified… (More)