Now showing items 1-20 of 85

    • On Scheduling Project Activities With Variable Expenditure Rates 

      Özdamar, Linet (KLUWER ACADEMIC PUBL, SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS, 1998-08)
      Commercial projects are undertaken with the expectation of maximizing financial returns. There are a variety of cash flow models in the literature in which payments, whose amounts depend on the type of contract quoted ...
    • A Hierarchical Planning System for Energy Intensive Production Environments 

      Özdamar, Linet; Birbil, SI (ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, 1999-01-15)
      This paper describes a hierarchical production planning approach with decision support features for energy intensive industries with particular reference to a tile manufacturing factory. In the tiling industry, the facilities ...
    • A Genetic Algorithm Approach to a General Category Project Scheduling Problem 

      Özdamar, Linet (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 345 E 47TH ST, NEW YORK, NY 10017-2394 USA, 1999-02)
      A genetic algorithm (GA) approach is proposed for the general resource constrained project scheduling model, in which activities may be executed in more than one operating mode and renewable as well as nonrenewable resource ...
    • FRACTOP: A Geometric Partitioning Metaheuristic for Global Optimization 

      Demirhan, M; Özdamar, Linet; Helvacıoğlu, L; Birbil, SI (KLUWER ACADEMIC PUBL, SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS, 1999-06)
      We propose a new metaheuristic, FRACTOP, for global optimization. FRACTOP is based on the geometric partitioning of the feasible region so that search metaheuristics such as Simulated Annealing (SA), or Genetic Algorithms ...
    • Hybrid Heuristics for the Multi-stage Capacitated Lot Sizing and Loading Problem 

      Linet, Özdamar (STOCKTON PRESS, HOUNDMILLS, BASINGSTOKE RG21 6XS, HAMPSHIRE, ENGLAND, 1999-08)
      The multi-stage capacitated lot sizing and loading problem (MCLSLP) deals with the issue of determining the lot sizes of product items in serially-arranged manufacturing stages and loading them on parallel facilities in ...
    • A Note On the Use of a Fuzzy Approach in Adaptive Partitioning Algorithms for Global Optimization 

      Demirhan, Melek; Özdamar, Linet (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA, 1999-08)
      In global optimization, adaptive partitioning algorithms (APA) operate on the basis of partitioning the feasible region into subregions, sampling and evaluating each subregion, and selecting one or more subregions for ...
    • A Hierarchical Planning Approach for a Production-distribution System 

      Özdamar, Linet; Aktin, Ayşe Tülin (TAYLOR & FRANCIS LTD, ONE GUNPOWDER SQUARE, LONDON EC4A 3DE, ENGLAND, 1999-11-10)
      A production-distribution model involving production and transportation decisions in a central factory and its warehouses is developed. The model is based on the operating system of a multi-national company producing ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...