Now showing items 1-9 of 9

    • Efficient computation of quadratic-phase integrals in optics 

      Özaktaş, H. M.; Koç, A.; Sarı, I.; Kutay, M. A. (Optical Society of America, 2006)
      Received June 29, 2005; revised manuscript received August 22, 2005; accepted September 12, 2005 We present a fast N log N time algorithm for computing quadratic-phase integrals. This three-parameter class of integrals ...
    • Fast algorithms for digital computation of linear canonical transforms 

      Koç, A.; Oktem, F. S.; Özaktaş, Haldun M.; Kutay, M. A. (Springer, New York, 2016)
      Fast and accurate algorithms for digital computation of linear canonical transforms (LCTs) are discussed. Direct numerical integration takes O.N2/ time, where N is the number of samples. Designing fast and accurate ...
    • Fast and accurate algorithms for quadratic phase integrals in optics and signal processing 

      Koç, A.; Özaktaş, Haldun M.; Hesselink L. (SPIE, 2011)
      The class of two-dimensional non-separable linear canonical transforms is the most general family of linear canonical transforms, which are important in both signal/image processing and optics. Application areas include ...
    • Fast and accurate linear canonical transform algorithms 

      Özaktaş, Haldun M.; Koç, A. (IEEE, 2015)
      Linear canonical transforms are encountered in many areas of science and engineering. Important transformations such as the fractional Fourier transform and the ordinary Fourier transform are special cases of this transform ...
    • Generating semantic similarity atlas for natural languages 

      Şenel, Lütfi Kerem; Utlu, İhsan; Yücesoy, V.; Koç, A.; Çukur, Tolga (IEEE, 2018-12)
      Cross-lingual studies attract a growing interest in natural language processing (NLP) research, and several studies showed that similar languages are more advantageous to work with than fundamentally different languages ...
    • Learning traffic congestion by contextual bandit problems for optimum localization 

      Şahin, Ümitcan; Yücesoy, V.; Koç, A.; Tekin, Cem (IEEE, 2017)
      Optimum localization problem, which has a wide range of application areas in real life such as emergency services, command and control systems, warehouse localization, shipment planning, aims to find the best location to ...
    • Measuring cross-lingual semantic similarity across European languages 

      Şenel, Lütfü Kerem; Yücesoy, V.; Koç, A.; Çukur, Tolga (IEEE, 2017)
      This paper studies cross-lingual semantic similarity (CLSS) between five European languages (i.e. English, French, German, Spanish and Italian) via unsupervised word embeddings from a cross-lingual lexicon. The vocabulary ...
    • Resolution enhancement of wide-field interferometric microscopy by coupled deep autoencoders 

      Işıl, Ç.; Yorulmaz, M.; Solmaz, B.; Turhan, Adil Burak; Yurdakul, C.; Ünlü, S.; Özbay, Ekmel; Koç, A. (OSA - The Optical Society, 2018)
      Wide-field interferometric microscopy is a highly sensitive, label-free, and low-cost biosensing imaging technique capable of visualizing individual biological nanoparticles such as viral pathogens and exosomes. However, ...
    • Semantic similarity between Turkish and European languages using word embeddings 

      Şenel, Lütfü Kerem; Yücesoy, V.; Koç, A.; Çukur, Tolga (IEEE, 2017)
      Representation of words coming from vocabulary of a language as real vectors in a high dimensional space is called as word embeddings. Word embeddings are proven to be successful in modelling semantic relations between ...