Yazar "Merdan, Mustafa" seçeneğine göre listele

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    Dispersion Analysis of SnS and SnSe
    (2002) Şafak, Haluk; Merdan, Mustafa; Yüksel, Ömer Faruk
    The reflectance spectra of single crystals of SnS and SnSe were measured at normal incidence by unpolarized light. The refractive indices of speciemens were calculated by Kramers-Kronig Analysis. On the basis of the Wemple diDomenico single oscillator model, the dispersion parameters were determined. It is found that the parameters obtained by unpolarized light are, in general close to those reported for polarized cases. Morever, a close similarity were observed with E//b polarization for SnS.
  • Küçük Resim
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    Improved Nelder-Mead Optimization Method in Learning Phase of Artificial Neural Networks
    (2018) Koçer, Hasan Erdinç; Merdan, Mustafa; Ibrahım, Mohammed Hussein
    Artificial neural networks method is the most important/preferred classification algorithm in machine learning area. The weightson the nets in artificial neural directly affect the classification accuracy of artificial neural networks. Therefore, finding optimum values ofthese weights is a difficult optimization problem. In this study, the Nelder-Mead optimization method has been improved and used fortraining of artificial neural networks. The optimum weights of artificial neural networks are determined in the training stage. Theperformance of the proposed improved Nelder-Mead-Artificial neural networks classification algorithm has been tested on the mostcommon datasets from the UCI machine learning repository. The classification results obtained from the proposed improved Nelder-Mead-Artificial neural networks classification algorithm are compared with the results of the standard Nelder-Mead-Artificial neural networksclassification algorithm. As a result of this comparison, the proposed improved Nelder-Mead-Artificial neural networks classificationalgorithm has given best results in all datasets.
  • Küçük Resim
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    Sıvı gıdalarda ultrasonik hız ölçümler
    (1998) Güzel, Hatice; Merdan, Mustafa
    Bu çalışmada 4 MHz'lik transduserle 20C ve 60C'de ultrasonik hız, sütlerde, meyve sularında Darbe-Yankı metodu ile ölçüldü. Hızları ile sıcaklıkları arasındaki bağıntı araştırıldı. Sütlerde ve meyve sularında sıcaklık arttıkça ultrasonik hızın düştüğü, suda ise sıcaklık arttıkça yükseldiği gözlendi. Ayrıca aynı deney düzeneği ve aynı transduser kullanılarak saf su ve tuzlu suda her 5 C sıcaklık artışına karşılık gelen ultrasonik hızlar ölçüldü (15-60 C, 4 MHz). Sıcaklık arttığında ultrasonik hızın da arttığı gözlendi.