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Wyszukujesz frazę "Abbasi, A." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Fast FCM with spatial neighborhood information for brain MR image segmentation
Autorzy:
Biniaz, A.
Abbasi, A.
Powiązania:
https://bibliotekanauki.pl/articles/91616.pdf
Data publikacji:
2013
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
Fuzzy c-Means clustering
FCM
Fast FCM
FFCM
spatial Fast FCM
sFFCM
MR image
noise interference
Opis:
Among different segmentation approaches Fuzzy c-Means clustering (FCM) is a welldeveloped algorithm for medical image segmentation. In emergency medical applications quick convergence of FCM is necessary. On the other hand spatial information is seldom exploited in standard FCM; therefore nuisance factors can simply affect it and cause misclassification. This paper aims to introduce a Fast FCM (FFCM) technique by incorporation of spatial neighborhood information which is exploited by a linear function on fuzzy membership. Applying proposed spatial Fast FCM (sFFCM), elapsed time is decreased and neighborhood spatial information is exploited in FFCM. Moreover, iteration numbers by proposed FFCM/sFFCM techniques are decreased efficiently. The FCM/FFCM techniques are examined on both simulated and real MR images. Furthermore, to considerably decrease of convergence time and iterations number, cluster centroids are initialized by an algorithm. Accuracy of the new approach is same as standard FCM. The quantitative assessments of presented FCM/FFCM techniques are evaluated by conventional validity functions. Experimental results demonstrate that sFFCM techniques efficiently handle noise interference and significantly decrease elapsed time.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2013, 3, 1; 15-25
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Segmentation and edge detection based on modified ant colony optimization for iris image processing
Autorzy:
Biniaz, A.
Abbasi, A.
Powiązania:
https://bibliotekanauki.pl/articles/91674.pdf
Data publikacji:
2013
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
ant colony optimization
stocktickerACO
digital image processing
artificial ant
image processing
iris
Opis:
Ant colony optimization (stocktickerACO) is a meta-heuristic algorithm inspired by food searching behavior of real ants. Recently stocktickerACO has been widely used in digital image processing. When artificial ants move in a discrete habitat like an image, they deposit pheromone in their prior position. Simultaneously, vaporizing of pheromone in each iteration step avoids from falling in the local minima trap. Iris recognition because of its great dependability and non-invasion has various applications. simulation results demonstrate stocktickerACO algorithm can effectively extract the iris texture. Also it is not sensitive to nuisance factors. Moreover, stocktickerACO in this research preserves details of the various synthetic and real images. Performance of ACO in iris segmentation is compared with operation of traditional approaches such as canny, robert, and sobel edge detections. Experimental results reveal high quality and quite promising of stocktickerACO to segment images with irregular and complex structures.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2013, 3, 2; 133-141
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Enhancement of High Power High Repetition Rate Semiconductor Opening Switches
Autorzy:
Abbasi, A.
Niayesh, K.
Shakeri, J.
Powiązania:
https://bibliotekanauki.pl/articles/1807869.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
85.30.De
Opis:
High power semiconductor opening switches (SOSs) with $P^+PNN^+$ doping profile have been used in different pulsed power applications because of their fast high current interruption capability. In high pulsed power applications with high repetition rate, temperature increase of the semiconductor switch during its operation is no more negligible. In this paper, the cut-off characteristics of SOSs with different doping profiles are compared and then the impact of the temperature increase on the performance of the semiconductor opening switch is investigated using a detailed physical model. The simulation results indicate that due to the temperature increase of the switch, both the current amplitude and the cut-off characteristics of the switch are affected. Semiconductor opening switches with different base materials (Si and SiC) are studied. Due to favorable intrinsic characteristics of SiC (higher thermal conductivity, higher saturation velocity and higher breakdown electric field), the performance of the SOS can be enhanced using SiC as the base material and the design of compact high pulsed power applications can be achieved.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 983-985
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Histopathological changes and oxidative damage in hepatic tissue of rats experimentally infected with Babesia bigemina
Autorzy:
Esmaeilnejad, B.
Tavassoli, M.
Samiei, A.
Abbasi, A.
Shafipour, A.
Esmaeilnejad, N.
Powiązania:
https://bibliotekanauki.pl/articles/2087681.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
liver
oxidative damage
rats
antioxidants
Babesia bigemina
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 3; 517-524
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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