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您的检索式：作者名="Ubaid Ullah"
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| 1 | A Review of Wideband Circularly Polarized Dielectric Resonator Antennas显示文摘This article presents a technical review of circularly polarized(CP) dielectric resonator antennas(DRA) for wideband applications.The primary objective of this review is,to highlight the techniques used by different researchers for generating circular polarization in DRA.First,a general idea of circular polarization and it advantages over linear polarization is presented,and then all the major developments made in the CP DRA are highlighted.The emphasis of the paper is on the wideband circularly polarized dielectric resonator antenna.The current state of the art and all the realizable features of the CP DRA are addressed comprehensively.Finally,some recommendations for future CP DRAs are given and the paper ends with concluding remarks. | Ubaid Ullah Mohd Fadzil Ain Zainal Arifin Ahmad | 2017 | China Communications2017，14，6： | 1 |
| 2 | Classification of Diabetic Macular Edema and Its Stages Using Color Fundus Image显示文摘Diabetic macular edema(DME)is a retinal thickening involving the center of the macula.It is one of the serious eye diseases which affects the central vision and can lead to partial or even complete visual loss.The only cure is timely diagnosis,prevention,and treatment of the disease.This paper presents an automated system for the diagnosis and classification of DME using color fundus image.In the proposed technique,first the optic disc is removed by applying some preprocessing steps.The preprocessed image is then passed through a classifier for segmentation of the image to detect exudates.The classifier uses dynamic thresholding technique by using some input parameters of the image.The stage classification is done on the basis of an early treatment diabetic retinopathy study(ETDRS)given criteria to assess the severity of disease.The proposed technique gives a sensitivity,specificity,and accuracy of 98.27%,96.58%,and 96.54%,respectively on publically available database. | Muhammad Zubair Shoab A.Khan Ubaid Ullah Yasin | 2014 | Journal of Electronic Science and Technology2014，12，2： | 0 |
| 3 | Screening outcomes of household contacts of multidrug-resistant tuberculosis patients in Peshawar,Pakistan显示文摘Objective:To assess the profile of TB/multidrug-resistant TB(MDR-TB) among household contacts of MDR-TB patients.Methods:Close contacts of MDR-TB patients were traced in the cross-sectional study.Different clinical,radiological and bacteriological were performed to rule out the evidence of TB/MDR-TB.Results:Between January 2012 and December 2012,a total of 200 index MDR-TB patients were initiated on MDR-TB treatment,out of which home visit and contacts screening were conducted for 154 index cases.Of 610 contacts who could be studied,41(17.4%) were diagnosed with MDR-TB and 10(4.2%) had TB.The most common symptoms observed were cough,chest pain and fever.Conclusions:The high incidence of MDR-TB among close contacts emphasize the need for effective contact screening programme of index MDR-TB cases in order to cut the chain of transmission of this disease. | Arshad Javaid Mazhar Ali Khan Mir Azam Khan Sumaira Mehreen Anila Basit Raza Ali Khan Muhammad Ihtesham Irfan Ullah Afsar Khan Ubaid Ullah | 2016 | Asian Pacific Journal of Tropical Medicine2016，9，9： | 0 |
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