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Browsing by Subject "Linear combinations"

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    • Conference Object  

      Distributed algorithms for control of demand response and distributed energy resources 

      Domínguez-Garcia, A. D.; Hadjicostis, Christoforos N. (2011)
      This paper proposes distributed algorithms for control and coordination of loads and distributed energy resources (DERs) in distribution networks. These algorithms are relevant for load curtailment control in demand response ...

    • Conference Object  

      Distributed calculation of linear functions in noisy networks via linear iterations 

      Sundaram, S.; Hadjicostis, Christoforos N. (2008)
      Given a fixed network where each node has some given initial value, and under the constraint that each node receives noisy transmissions from its immediate neighbors, we provide a distributed scheme for any node to calculate ...

    • Conference Object  

      Distributed strategies for average consensus in directed graphs 

      Domínguez-Garcia, A. D.; Hadjicostis, Christoforos N. (2011)
      We address the average consensus problem for a distributed system whose components (nodes) can exchange information via interconnections (links) that form an arbitrary, strongly connected but possibly directed, topology ...

    • Article  

      Efficient MFS algorithms for inhomogeneous polyharmonic problems 

      Karageorghis, Andreas (2011)
      In this work we develop an efficient algorithm for the application of the method of fundamental solutions to inhomogeneous polyharmonic problems, that is problems governed by equations of the form Δ ℓ u=f, ℓ ε ℕ, in circular ...

    • Conference Object  

      Information dissemination in networks via linear iterative strategies over finite fields 

      Sundaram, S.; Hadjicostis, Christoforos N. (2009)
      Given an arbitrary network of interconnected nodes, each with an initial value from a discrete set, we consider the problem of distributively disseminating these initial values under the constraint that the nodes can only ...

    • Conference Object  

      Linear iterative strategies for transmitting streams of values through sensor networks 

      Sundaram, S.; Hadjicostis, Christoforos N. (2009)
      For any given fixed network of interconnected nodes, with some nodes designated as sources and some nodes designated as sinks, we investigate the problem of transmitting a stream of values from every source node to all of ...

    • Article  

      The method of fundamental solutions in Three-dimensional Elastostatics 

      Poullikkas, A.; Karageorghis, Andreas; Georgiou, Georgios C. (2002)
      We consider the application of the Method of Fundamental Solutions (MFS) to isotropic elastostatics problems in three-space dimensions. The displacements are approximated by linear combinations of the fundamental solutions ...

    • Conference Object  

      On the time complexity of information dissemination via linear iterative strategies 

      Sundaram, S.; Hadjicostis, Christoforos N. (2010)
      Given an arbitrary network of interconnected nodes, each with an initial value, we study the number of time-steps required for some (or all) of the nodes to gather all of the initial values via a linear iterative strategy. ...

    • Article  

      Optimal control of uncertain stochastic systems subject to total variation distance uncertainty 

      Rezaei, F.; Charalambous, Charalambos D.; Ahmed, N. U. (2012)
      This paper is concerned with optimization of uncertain stochastic systems, in which uncertainty is described by a total variation distance constraint between the measures induced by the uncertain systems and the measure ...

    • Conference Object  

      Optimal stochastic control of discrete-time systems subject to total variation distance uncertainty 

      Charalambous, Charalambos D.; Rezaei, F.; Tzortzis, I. (2010)
      This paper presents another application of the results in [1], [2], where existence of the maximizing measure over the total variation distance constraint is established, while the maximizing pay-off is shown to be equivalent ...

    • Article  

      Series decomposition of fractional Brownian motion and its Lamperti transform 

      Baxevani, Anastassia; Podgórski, K. (2009)
      The Lamperti transformation of a self-similar process is a stationary process. In particular, the fractional Brownian motion transforms to the second order stationary Gaussian process. This process is represented as a ...

    • Conference Object  

      Stochastic optimal control subject to variational norm uncertainty: Viscosity subsolution for generalized HJB inequality 

      Rezaei, F.; Charalambous, Charalambos D.; Ahmed, N. U. (2009)
      This paper is concerned with optimization of stochastic uncertain systems, when systems are described by measures and the pay-off by a linear functional on the space of measure, on general abstract spaces. Robustness is ...

    • Conference Object  

      The wireless control network: Monitoring for malicious behavior 

      Sundaram, S.; Pajic, M.; Hadjicostis, Christoforos N.; Mangharam, R.; Pappas, G. J. (2010)
      We consider the problem of stabilizing a plant with a network of resource constrained wireless nodes. In a companion paper, we developed a protocol where each node repeatedly transmits an appropriate (stabilizing) linear ...

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