Now showing items 21-40 of 145

    • Analysis of Solution Space-Dependent Performance of Simulated Annealing: The Case of the Multi-level Capacitated Lot Sizing Problem 

      Barbarasoğlu, G; Özdamar, Linet (PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2000-08)
      This study describes an analysis of different neighbourhood transition schemes and their effects; on the performance of a general purpose simulated annealing (SA) procedure in solving the dynamic multi-level capacitated ...
    • Experiments with New Stochastic Global Optimization Search Techniques 

      Özdamar, Linet; Demirhan, M (PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, 2000-08)
      In this paper several probabilistic search techniques are developed for global optimization under three heuristic classifications: simulated annealing, clustering methods and adaptive partitioning algorithms. The algorithms ...
    • An Integrated Lagrangean Relaxation-Simulated Annealing Approach to the Multi-level Multi-item capacitated lot sizing problem 

      Özdamar, Linet; Barbarasoğlu, G (ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2000-12-20)
      This study proposes a heuristic approach for the solution of the dynamic multi-level multi-item capacitated lot sizing problem (MLCLSP) with general product structures. The difficulty in solving MLCLSP is to provide ...
    • Comparison of Partition Evaluation Measures in an Adaptive Partitioning Algorithm for Global Optimization 

      Özdamar, Linet; Demirhan, M (ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 2001-01-01)
      An adaptive partitioning algorithm with random search is proposed to locate the global optimum of multimodal functions. Partitioning algorithms divide the feasible region into nonoverlapping partitions in order to restrict ...
    • Discussions On Suitable Modulation Schemes for a Bi-directional Hot Electron Light Emitter and Absorber 

      Wah, JY; Yenidünya, R; Boland-Thoms, A; Demirer, R. Murat; Balkan, N (IEE-INST ELEC ENG, MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND, 2002-10)
      The hot electron light emitting and lasing semiconductor heterojunction (HELLISH) device is a novel emitter that utilises hot electron/hole transport parallel to the layers of an AlxGa1-xAs p-n junction containing GaAs ...
    • A component-oriented process model 

      Altunel, Yusuf (IEEE Computer Soc, 10662 Los Vaqueros Circle, Po Box 3014, Los Alamitos, Ca 90720-1314 USA, 2003-07)
    • Multiple model based adaptive control of a DC motor under load changes 

      Cezayirli, A.; Cılız, K. (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2004)
      This short paper aims to survey available multiple model adaptive control (MMAC) techniques and to propose a different methodology for the multiple model based approach for the control of a DC motor under load changes. Two ...
    • Sintering effect on mechanical properties of composites of bovine hydroxyapatite (BHA) and Li2O 

      Oktar, Faik Nüzhet; Demirer, M. R.; Gündüz, Oğuzhan; Agathopoulos, S.; Peker, I.; Özyeğin, L. S.; Salman, Serdar (Trans Tech Publications Ltd, Brandrain 6, Ch-8707 Zurich-Uetikon, Switzerland, 2006)
      In this study, hydroxyapatite (HA) material, obtained from calcinated bovine bone (BHA), was mixed with 0.25, 0.50, 1.00, and 2.00 wt% Li2CO3. The pressed pellets were sintered at various sintering temperatures between 900 ...
    • A graph-based web service composition technique using ontological information 

      Aydoğan, Reyhan; Zirtiloğlu, Hande (IEEE Computer Soc, 10662 Los Vaqueros Circle, Po Box 3014, Los Alamitos, Ca 90720-1264 USA, 2007)
      We investigate Web service composition as a planning problem and use the input-output parameter relations in order to select the constituent services that make up the composite service. Furthermore, we make use of ontological ...
    • Fuzzy clustering neural networks for real-time odor recognition system 

      Karlık, Bekir; Yüksek, Kemal (Hindawi Publishing Corp, 315 Madison Ave 3Rd Flr, Ste 3070, New York, Ny 10017 USA, 2007)
      The aim of this study is to develop a novel fuzzy clustering neural network (FCNN) algorithm as pattern classifiers for real-time odor recognition system. In this type of FCNN, the input neurons activations are derived ...
    • Investigation of Zipf's 'law-of-meaning' on Turkish corpora 

      İlgen, Bahar; Karaoğlan, Bahar (IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA, 2007)
      Zipf's law-of-meaning states that the number of meanings of a word is related to its frequency. Words that are seen more frequently tend to have more meanings than the ones that are seen less frequently. This law, like the ...
    • Component-based software development with component variants 

      Altunel, Yusuf; Tolun, Mehmet R. (ACTA PRESS ANAHEIM, PO BOX 5124, ANAHEIM, CA 92814-5124 USA, 2007)
      Variants are the new units suggested for component-based software implementation to contain just one set of features that a traditional component might normally contain. They help us to implement the specialization of ...
    • Clustering and dimensionality reduction to determine important software quality metrics 

      Turan, Metin; Çataltepe, Zehra (IEEE, 345 E 47th St, New York, Ny 10017 USA, 2007)
      During the last two decades research on software engineering is concentrated on quality. The best approach to quality evaluation goes through determining well-defined metrics on software properties. One such property is ...
    • Consensual classification of drug and nondrug compounds 

      Pehlivanlı, Ayça C.; İbrikçi, Turgay; Ersoy, Okan K. (2008)
      A special consensual approach is discussed for separating a molecular group with a proven pharmacological activity from another molecular group without any activity. It is mainly a group decision to produce a consensus of ...
    • Drug/nondrug classification with consensual self-organising map and self-organising global ranking algorithms 

      Pehlivanlı, Ayça C.; Ersoy, Okan K.; ibrikçi, Turgay (2008)
      In this paper, a special consensual approach is discussed for separating the druglike compounds from the non-druglike compounds. It involves a group decision to produce a consensus of multiple classification results obtained ...
    • A new contour reconstruction approach from dexel data in virtual sculpting 

      Yüksel, Kemal; Zhang, Weihan; Ridzalski, Boryslaw Iwo; Leu, Ming C. (IEEE COMPUTER SOC, 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA, 2008)
      This paper presents a novel method of contour reconstruction from dexel data solving the shape anomalies for the complex geometry in virtual sculpting. Grouping and traversing processes are developed to find connectivity ...
    • Component-Based Project Estimation Issues for Recursive Development 

      Altunel, Yusuf; Tolun, Mehmet R. (SPRINGER, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS, 2008)
      In this paper we investigated the component-based specific issues that might affect project cost estimation. Component-based software development changes the style of software production. With component-based approach the ...
    • Decrease of event related theta coherence at left frontal-parietal connection in Alzheimer patients 

      Başar, Erol; Güntekin, Bahar; Yener, Görsev G.; Saatçı, Ertuğrul (Elsevier Science Inc, 360 Park Ave South, New York, Ny 10010-1710 USA, 2008-04-01)
    • Evoked coherence in Alzheimer disease 

      Güntekin, Bahar; Saatçı, Ertuğrul; Yener, Görsev G.; Başar, Erol (Elsevier Science Bv, Po Box 211, 1000 AE Amsterdam, Netherlands, 2008-09)
    • Interactive Data Mining for Molecular Graphs 

      Yılmaz, Burcu; Göktürk, Mehmet (Hindawi Publishing Corp, 410 Park Avenue, 15Th Floor, #287 Pmb, New York, Ny 10022 Usa, 2009)
      Designing new medical drugs for a specific disease requires extensive analysis of many molecules that have an activity for the disease. The main goal of these extensive analyses is to discover substructures (fragments) ...