research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Structure and Optical Properties of ZnCdO Thin Films Prepared by Spray Pyrolysis

Author: Jabbar H. Khlaief
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2016 Volume: 19 Issue: 3 Pages: 77-86
Publisher: Al-Nahrain University جامعة النهرين

Loading...
Loading...
Abstract

ZnCdO films were compounded by spray pyrolysis on glass substrates at temperature of 250Co, using solution of zinc acetate and cadmium acetate salts with various additions concentrations of Zn (25, 50, 75)%. Structure and optical properties have been analyzed using XRD and UV-Vis spectroscopy. XRD analysis premiered that thin films were of polycrystalline nature with face centered cubic structure. The crystallinity increases when the Zn additions increases. Film additions with 75% Zn has minimum value of dislocation density and strain which confirm the improved crystallinity of the film. The optical results featured the transparency of the ZnCdO films is greater than 80% in the visible region, and we found when the concentration of Zn additions increase the optical band gap increasing from (2.49 to 2.9eV).

اغشية اوكسيد الكادميوم-الزنك تم تحضيرها بطريقة الرش الكيميائي الحراري على قواعد من الزجاج وبدرجة حرارة 250 درجة مئوية، باستخدام محاليل لاملاح الكادميوم والزنك وبنسب اضافة مختلفة لمادة الزنك (%25,50,75). الخصائص التركيبية والبصرية تم تحليلها باستخدام حيود الاشعة السينية ومطياف الاشعة المرئية – فوق البنفسجية. واظهرت نتائج حيود الاشعة السينية أن الاغشية الرقيقة ذات طبيعة متعددة التبلوروبتركيب الوجه المركزي المكعب. وبينت نتائج النفاذية البصرية بأن اغشية اوكسيد الكادميوم زنك ذات نفاذية عالية اكبر من 80% للمنطقة المرئية. وقد وجدنا عند زيادة تركيز اضافة الزنك ان فجوة الطاقة تزداد من (2.49 الى 2.9 الكترون فولت).


Article
Wavelet-Based Denoising Of Images

Authors: Alauldeen S. yaseen --- Rafid S. Zamel Jabbar H. Khlaief
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2019 Volume: 37 Issue: 2part (B) Science Pages: 54-60
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

Abstract- Wavelet-analysis has become a powerful tool for denoising images. Itrepresents a new way to achieve better noise reduction and increased contrast.Here, experimentally demonstrate abilities of discrete wavelet transform withDaubechies basis functions for improving the quality of noisy images.in thisresearch two methods has been compaired for modify the coefficients using softand hard threshold to improv the visual fineness of noisy image depend onRoot-Mean-Square error (RMS). The low RMS value and better noise reductionfind in soft threshold method which is based on Daubechies wavelet (db8) forfirst example image RMS=0.101 and second example RMS=0.109

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2019 (1)

2016 (1)