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作者： Murtada mohamed edris Adam 东北师范大学

学位级别：硕士

由于有机太阳能电池的可塑性,易于操作,成本低,它们是最合适的能量替代物的候选品。本文以两个X型分子即M1和M2为基础,从理论上提出一种高效的有机太阳能电池。密度泛函理论(DFT)成功地用来研究所提出的化合物给电子基团对于电化学和光... 详细信息

由于有机太阳能电池的可塑性,易于操作,成本低,它们是最合适的能量替代物的候选品。本文以两个X型分子即M1和M2为基础,从理论上提出一种高效的有机太阳能电池。密度泛函理论(DFT)成功地用来研究所提出的化合物给电子基团对于电化学和光学性能的影响。结果清楚地证实,给电子基团的使用,尤其是-OCH3和-CH3,能量水平提高约40%,这归因于在这样的基团中有较高的电子密度。同时对比于其它的报告,通过吸电子基团的使用,能量水平减少。因此这样的结果说明给电子基团有显著提高光学性质的能力,可以提高有机太阳能电池的效能。

关键词：有机光电池(OPV) 密度泛函理论(DFT) 太阳能电池

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Survival and outcomes for co-infection of chronic hepatitis C with and without cirrhosis and COVID-19: A multicenter retrospective study

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World Journal of Gastroenterology 2021年第42期27卷 7362-7375页

作者： Shimaa Afify Basem Eysa Fatma Abdel Hamid Omnia M Abo-Elazm mohamed a edris Rabab Maher Ahmed Abdelhalim Muhammad Mostafa Abdel Ghaffar Dalia A Omran Hend Ibrahim Shousha Department of Gastroenterology National Hepatology and Tropical Medicine Research InstituteCairo 20222Egypt Department of Endemic Medicine Faculty of MedicineFayoum UniversityEl-Fayoum 13524Egypt Department of Biostatistics and Cancer Epidemiology National Cancer InstituteCairo 20222Egypt Department of Gastroenterology Students HospitalCairo UniversityGiza 12111Egypt The General Organization for Teaching Hospitals and Institutes Cairo 11562Egypt Department of Endemic Medicine Faculty of MedicineCairo UniversityCairo 11562Egypt

BACKGROUND Chronic liver disease,particularly cirrhosis,is associated with worse outcomes in patients infected with coronavirus disease 2019(COVID-19).AIM To assess outcomes of COVID-19 infection among patients with pre-existing hepatitis C with or without liver *** This multicenter,retrospective cohort study included all cases of confirmed coinfection of severe acute respiratory syndrome coronavirus 2 and chronic hepatitis C with or without liver cirrhosis who were admitted to six hospitals(Al-Sahel Hospital,Al-Matareya Hospital,Al-Ahrar Hospital,Ahmed Maher Teaching Hospital,Al-Gomhoreya Hospital,and the National Hepatology and Tropical Medicine Research Institute)affiliated with the General Organization for Teaching Hospitals and Institutes in *** were recruited from May 1,2020,to July 31,***,laboratory,imaging features,and outcomes were *** regression analysis was performed to detect factors affecting *** This retrospective cohort study included 125 patients with chronic hepatitis C and COVID-19 co-infection,of which 64(51.20%)had liver cirrhosis and 40(32.00%)***,cough,dyspnea,and fatigue were the most frequent symptoms in patients with liver ***,sore throat,fatigue,myalgia,and diarrhea were significantly more common in patients with liver cirrhosis than in noncirrhotic *** was no difference between patients with and without cirrhosis regarding *** patients(23.40%)with liver cirrhosis presented with hepatic *** with liver cirrhosis were more likely than non-cirrhotic patients to have combined ground-glass opacities and consolidations in CT chest scans:28(43.75%)vs 4(6.55%),respectively(P value<0.001).These patients also were more likely to have severe COVID-19 infection,compared to patients without liver cirrhosis:29(45.31%)vs 11(18.04%),respectively(P value<0.003).Mortality was higher in patients with liver cirrhosis,compar

关键词： COVID-19 Egypt Outcome Liver cirrhosis Chronic hepatitis C

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A New Approach for Converting Renewable Energy to Stable Energy

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Engineering（科研） 2013年第10期5卷 27-33页

作者： mohamed Talaat Reda edris Naglaa Ibrahim Fatma Omar mohamed Ibrahim Electrical and Computer Engineering Higher Technological Institute 10th of Ramadan City Egypt Electrical Power and Machines Faculty of Engineering Zagazig University Zagazig Egypt

A renewable energy plant which relies on wind speed or solar insolation is unreliable because of the stochastic nature of weather patterns. It is theorized that by using multiple renewable energy plants in separate areas of a region, the different weather conditions might approach a probabilistically independent relationship. The goal of this paper is to utilize the power system technology to help disseminate wind and solar power systems to get a stable energy. A new approach to get appropriate stable energy is achieved by using the interrupted energy that obtained from wind farm and solar insolation. This is achieved by lifting water to a higher level with appropriate pumps and storing it in the form of potential energy. Then a stable energy is obtained by reliving water to the lower level. In this paper, the efficiency obtained from the renewable energy is compared with that obtained from traditional ones. An experimental model to simulate the process of converting the renewable energy to a stable energy is presented. The obtained results from experimental model explained that the renewable energy can be converted to a stable one with high efficiency.

关键词： Renewable Energy Stable Energy Energy Stored Wind Farm Solar Energy Application of Renewable Energy

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