Now showing items 1-16 of 16

    • Aggregate profile clustering for streaming analytics 

      Abbasoğlu, M. A.; Gedk, B.; Ferhatosmanoğu H. (Oxford University Press, 2015)
      Many analytic applications require analyzing user interaction data. In particular, such data can be aggregated over a window to build user activity profiles. Clustering such aggregate profiles is useful for grouping together ...
    • Aggregate profile clustering for telco analytics 

      Abbasoğlu, M.A.; Gedik, B.; Ferhatosmanoğlu H. (2013)
      Many telco analytics require maintaining call profiles based on recent customer call patterns. Such call profiles are typically organized as aggregations computed at different time scales over the recent customer interactions. ...
    • Auto-parallelizing stateful distributed streaming applications 

      Schneider, S.; Hirzel, M.; Gedik, Buğra; Wu, K. -L. (2012)
      Streaming applications transform possibly infinite streams of data and often have both high throughput and low latency requirements. They are comprised of operator graphs that produce and consume data tuples. The streaming ...
    • CAPSULE: Language and system support for efficient state sharing in distributed stream processing systems 

      Losa, G.; Kumar, V.; Andrade, H.; Gedik, Buğra; Hirzel, M.; Soulé, R.; Wu, K. -L. (ACM, 2012)
      Data stream processing applications are often expressed as data flow graphs, composed of operators connected via streams. This structured representation provides a simple yet powerful paradigm for building large-scale, ...
    • Cumulant-based parametric multichannel FIR system identification methods 

      Özgen, M. T.; Alshebeili, S. A.; Çetin, A. Enis; Venetsanopoulos, A. N. (Elsevier, 1994)
      In this paper, “least squares” and recursive methods for simultaneous identification of four nonminimum phase linear, time-invariant FIR systems are presented. The methods utilize the second- and fourth-order cumulants of ...
    • Decentralized control and periodic feedback 

      Khargonekar P. P.; Özgüler, A. B. (IEEE, 1994)
      The decentralized stabilization problem for linear, discretetime, periodically time-varying plants using periodic controllers is considered. The main tool used is the technique of lifting a periodic system to a time-invariant ...
    • Dynamic boundary control of the timoshenko beam 

      Morgül, Ö. (Pergamon Press, 1992)
      We consider a clamped-free Timoshenko beam. To stabilize the beam vibrations, we propose a dynamic boundary control law applied at the free end of the beam. We prove that with the proposed control law, the beam vibrations ...
    • A dynamic control law for the wave equation 

      Morgül, Ö. (Elsevier, 1994)
      We consider a system described by the one-dimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize the system, we propose a dynamic boundary controller applied at the free end ...
    • An exponential stability result for the wave equation 

      Morgül, Ö. (Elsevier, 2002)
      We consider a system described by the one-dimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize this system, we propose a dynamic boundary controller applied at the free ...
    • On algebraic properties of general proper decentralized systems 

      Yu, R.; Sezer, M. E.; Gao, W. (Elsevier, 1993)
      The new concepts of the decentralized output feedback variable polynomial, the decentralized output feedback cycle index of general proper systems, and the geometric multiplicities of decentralized fixed modes are introduced. ...
    • Optimal control of a two-stage stochastic hybrid manufacturing system with Poisson arrivals and exponential service times 

      Gökbayrak, Kağan; Selvi, Ömer (IEEE, 2005)
      Extending earli'er work on single-stage stochastic hybrid system models, we consider a two-stage stochastic hybrid system where the job arrivals are represented through a Poisson process, and the service times required to ...
    • Parameter identification for partially observed diffusions 

      Dabbous, T.E.; Ahmed, N.U. (Kluwer Academic Publishers-Plenum Publishers, 1992)
      In this paper, we consider the identification problem of drift and dispersion parameters for a class of partially observed systems governed by Ito equations. Using the pathwise description of the Zakai equation, we formulate ...
    • SPL: an extensible language for distributed stream processing 

      Hirzel M.; Schneider S.; Gedik, B. (Association for Computing Machinery, 2017)
      Big data is revolutionizing how all sectors of our economy do business, including telecommunication, transportation, medical, and finance. Big data comes in two flavors: data at rest and data in motion. Processing data in ...
    • Stabilization and disturbance rejection for the beam equation 

      Morgül, Ö. (IEEE, 2001)
      We consider a system described by the Euler-Bernoulli beam equation. For stabilization, we propose a dynamic boundary controller applied at the free end of the system. The transfer function of the controller is a marginally ...
    • Stabilization and disturbance rejection for the wave equation 

      Morgül, Ö. (Institute of Electrical and Electronics Engineers, 1998-01)
      We consider a system described by the one-dimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize the system, we propose a dynamic boundary controller applied at the free end ...
    • Two-channel decentralized integral-action controller design 

      Gündeş, A. N.; Özgüler, A. B. (IEEE, 2002)
      We propose a systematic controller design method that provides integral-action in linear time-invariant two-channel decentralized control systems. Each channel of the plant is single-input-single-output, with any number ...