Now showing items 1-20 of 20

    • Comparison of the CAF-DF and sage algorithms in multipath channel parameter estimation 

      Güldoğan, M. Burak; Arıkan, Orhan (IEEE, 2008-07)
      In this paper, performance of the recently proposed Cross Ambiguity Function - Direction Finding (CAF-DF) technique is compared with the Space Alternating Generalized Expectation Maximization (SAGE) technique. The CAF-DF, ...
    • Çokyollu ortamda çapraz belirsizlik işlevi-yön bulma tekniğinin başarım analizi 

      Güldoǧan, Mehmet Burak; Arıkan, Orhan (IEEE, 2008-04)
      Bu bildiride, Çapraz Belirsizlik İşlevi-Yön Bulma (CAFDF) tekniğinin çokyollu ortamlardaki sinyallerin zaman gecikmesi, Doppler kayması, geliş yönü(GY) ve genlik kestirimindeki başarımı ile yiiksek çözünürlüklü algoritmalar ...
    • 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 ...
    • Integral action based Dirichlet boundary control of Burgers equation 

      Efe, M. Ö.; Özbay, Hitay (IEEE, 2003)
      Modeling and boundary control for Burgers Equation is studied in this paper. Modeling has been done via processing of numerical observations through singular value decomposition with Galerkin projection. This results in a ...
    • İçerik tabanlı görüntü erişimi için sahne sınıflandırması 

      Çavuş, Özge; Aksoy, Selim (IEEE, 2008-04)
      Son yıllarda çok geniş veri tabanlarının kullanımıyla birlikte içerik tabanlı görüntü indekslemesi ve erişimi önemli bir araştırma konusu halini almıştır. Bu çalışmada, görüntü indekslemesi için sahne sınıflandırmasını baz ...
    • İnsansız hava araçları için eşanlı konumlandırma ve haritalama 

      Kök, Mehmet; Barshan, Billur (IEEE, 2008-04)
      Sabit yükseklikte uçtuğu varsayılan insansız Hava Araçları ( İHA) için görü-tabanlı bir Eşanlı Konumlandırma ve Haritalama (EKVH) algoritması sunulmaktadır. Araç üzerindeki kameradan elde edilen görüntülerin öznitelikleri ...
    • A Mathematical Model for Cholesterol Biosynthesis under Nicotine Exposure 

      Gölgeli, M.; Özbay, Hitay (Elsevier B.V., 2016)
      In this paper, a mathematical model is considered for analyzing the impact of nicotine exposure to cholesterol biosynthesis. The dynamical model is nonlinear. Its equilibrium points are computed and conditions are provided ...
    • On the boundary control of a flexible robot arm 

      Morgül, Ömer (IEEE, 2001)
      We consider a flexible robot arm modeled as a single flexible link clamped to a rigid body. We assume that the system performs only planar motion. For this system, we pose two control problems; namely, the orientation and ...
    • On the control of chaotic systems in Lur'e form by using dither 

      Morgül, Ö. (Institute of Electrical and Electronics Engineers, 1999-10)
      In this paper we propose the application of dither for controlling chaotic systems in the Lur'e form. Dither is a high-frequency periodic signal and has the effect of modifying the nonlinearity for some nonlinear systems. ...
    • On the performance of linear least-squares estimation in wireless positioning systems 

      Gezici, Sinan; Güvenç, İ.; Sahinoğlu, Z. (IEEE, 2008-05)
      A common technique for wireless positioning is to estimate time-of-arrivals (TOAs) of signals traveling between a target node and a number of reference nodes, and then to determine the position of the target node based on ...
    • On the S-procedure and some variants 

      Derinkuyu, K.; Pınar, M. Ç. (Springer, 2006)
      We give a concise review and extension of S-procedure that is an instrumental tool in control theory and robust optimization analysis. We also discuss the approximate S-Lemma as well as its applications in robust optimization.
    • On the stabilization and stability robustness against small delays of some damped wave equations 

      Morgül, O. (IEEE, 1995)
      In this note we consider a system which can be modeled by two different one-dimensional damped wave equations in a bounded domain, both parameterized by a nonnegative damping constant. We assume that the system is fixed ...
    • On the stabilization of a cable with a tip mass 

      Morgül, Ö.; Rao, B. P.; Conrad, F. (IEEE, 1994)
      In this note, we consider a vertical cable which is pinched at the upper end. A mass is attached at the lower end where a control force is also applied. We show that this hybrid system is uniformly stabilized by choosing ...
    • Online balancing two independent criteria 

      Tse, Savio S.H. (Springer, 2008-10)
      We study the online bicriteria load balancing problem in this paper. We choose a system of distributed homogeneous file servers located in a cluster as the scenario and propose two online approximate algorithms for balancing ...
    • Online bicriteria load balancing using object reallocation 

      Tse, S. S. H. (Institute of Electrical and Electronics Engineers, 2009-03)
      We study the bicriteria load balancing problem on two independent parameters under the allowance of object reallocation. The scenario is a system of $M$ distributed file servers located in a cluster, and we propose three ...
    • Optimal hybrid control of a two-stage manufacturing system 

      Gökbayrak, Kağan; Selvi, Ömer (IEEE, 2006)
      We consider a two-stage serial hybrid system for which the arrival times are known and the service times are controllable. We derive some optimal sample path characteristics, in particular, we show that no buffering is ...
    • Smart composites with tunable stress–strain curves 

      Özcan, Mert; Çakmakçı, Melih; Temizer, İlker (Springer, 2020)
      Smart composites with tunable stress–strain curves are explored in a numerical setting. The macroscopic response of the composite is endowed with tunable characteristics through microscopic constituents which respond to ...
    • Stride-to-stride energy regulation for robust self-stability of a torque-actuated dissipative spring-mass hopper 

      Ankarali, M. M.; Saranli, U. (A I P Publishing LLC, 2010)
      In this paper, we analyze the self-stability properties of planar running with a dissipative spring-mass model driven by torque actuation at the hip. We first show that a two-dimensional, approximate analytic return map ...
    • Theoretical limits on time delay estimation for ultra-wideband cognitive radios 

      Gezici, Sinan; Celebi, H.; Arslan, H.; Poor, H. V. (IEEE, 2008-09)
      In this paper, theoretical limits on time delay estimation are studied for ultra-wideband (UWB) cognitive radio systems. For a generic UWB spectrum with dispersed bands, the Cramer-Rao lower bound (CRLB) is derived for ...
    • Ultra-wideband range estimation: Theoretical limits and practical algorithms 

      Güvenç, İ.; Gezici, Sinan; Şahinoğlu, Z. (IEEE, 2008-09)
      The high time resolution of ultra-wideband (UWB) signals enables wireless devices to perform accurate range estimation. In order to realize UWB systems with accurate ranging capabilities, both theoretical limits on range ...