A general version of the inverted exponential distribution is introduced, studied and analyzed. This generalization depends on the method of Marshall-Olkin to extend a family of distributions. Some statistical and rel...A general version of the inverted exponential distribution is introduced, studied and analyzed. This generalization depends on the method of Marshall-Olkin to extend a family of distributions. Some statistical and reliability properties of this family are studied. In addition, numerical estimation of the maximum likelihood estimate（MLE） parameters are discussed in details. As an application, some real data sets are analyzed and it is observed that the presented family provides a better fit than some other known distributions.展开更多
Color conversion glass ceramics are prepared by cosintering borosilicate glass frits and green 0.06Ce：Y2.94（Al1-xGax）5O12 phosphors. The crystal structures, the influence of Ga concentration on the photoluminescen...Color conversion glass ceramics are prepared by cosintering borosilicate glass frits and green 0.06Ce：Y2.94（Al1-xGax）5O12 phosphors. The crystal structures, the influence of Ga concentration on the photoluminescence （PL）, and reliability properties of the color conversion glass ceramics are investigated. The PL emission wavelengths of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics show blue shift from 545 nm to 525 nm with increasing Ga content （x value） under excited at 460 nm. Reliability test results show that the quantum yield （QY） of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics decreases from 70.60% to 59.06% with x value increasing from 0.15 to 0.35 under the ambient condition of 85℃/RH85% for the exposure time of 168 h. And the quantum yield （QY） of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics decreases from 65.13% to 52.23% after being soaked into boiled water for 4 h. The finding reveals that the addition of Ga can deteriorate the reliability of the color conversion glass ceramics.展开更多
Iris recognition technology recognizes a human based on his/her iris pattern. However, the accuracy of the iris recognition technology depends on accurate iris localization. Localizing a pupil region in the presence o...Iris recognition technology recognizes a human based on his/her iris pattern. However, the accuracy of the iris recognition technology depends on accurate iris localization. Localizing a pupil region in the presence of other low-intensity regions, such as hairs, eyebrows, and eyelashes, is a challenging task. This study proposes an iris localization technique that includes a localizing pupillary boundary in a sub-image by using an integral projection function and two-dimensional shape properties （e.g., area, geometry, and circularity）. The limbic boundary is localized using gradients and an error distance transform, and the boundary is regularized with active contours. Experimental results obtained from public databases show the superiority of the Drooosed techniaue over contemporary methods.展开更多
基金supported by the Research Center of the Female Scientific and Medical Colleges,Deanship of Scientific Research,King Saud University
文摘A general version of the inverted exponential distribution is introduced, studied and analyzed. This generalization depends on the method of Marshall-Olkin to extend a family of distributions. Some statistical and reliability properties of this family are studied. In addition, numerical estimation of the maximum likelihood estimate（MLE） parameters are discussed in details. As an application, some real data sets are analyzed and it is observed that the presented family provides a better fit than some other known distributions.
基金Project supported by the National Natural Science Foundation of China(Grant No.51302171)the Science and Technology Commission of Shanghai Municipality,China(Grant No.14500503300)the Natural Science Foundation of Shanghai,China(Grant No.12ZR1430900)
文摘Color conversion glass ceramics are prepared by cosintering borosilicate glass frits and green 0.06Ce：Y2.94（Al1-xGax）5O12 phosphors. The crystal structures, the influence of Ga concentration on the photoluminescence （PL）, and reliability properties of the color conversion glass ceramics are investigated. The PL emission wavelengths of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics show blue shift from 545 nm to 525 nm with increasing Ga content （x value） under excited at 460 nm. Reliability test results show that the quantum yield （QY） of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics decreases from 70.60% to 59.06% with x value increasing from 0.15 to 0.35 under the ambient condition of 85℃/RH85% for the exposure time of 168 h. And the quantum yield （QY） of 0.06Ce：Y2.94（Al1-xGax）5O12 glass ceramics decreases from 65.13% to 52.23% after being soaked into boiled water for 4 h. The finding reveals that the addition of Ga can deteriorate the reliability of the color conversion glass ceramics.
基金supported by in-house PhD Program of COMSATS Institute of Information Technology,Islamabad Campus Pakistan
文摘Iris recognition technology recognizes a human based on his/her iris pattern. However, the accuracy of the iris recognition technology depends on accurate iris localization. Localizing a pupil region in the presence of other low-intensity regions, such as hairs, eyebrows, and eyelashes, is a challenging task. This study proposes an iris localization technique that includes a localizing pupillary boundary in a sub-image by using an integral projection function and two-dimensional shape properties （e.g., area, geometry, and circularity）. The limbic boundary is localized using gradients and an error distance transform, and the boundary is regularized with active contours. Experimental results obtained from public databases show the superiority of the Drooosed techniaue over contemporary methods.
