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Nuclear Science and Techniques 2020年第5期31卷 44-56页

作者： A.m.Khalaf Azza O.el-Shal m.m.Taha m.a.el-sayed Physics Department Faculty of ScienceAl-Azhar UniversityCairoEgypt mathematics and Theoretical Physics Department Nuclear Research CenterAtomic Energy AuthorityCairo 13759Egypt

The shape transition between the vibrational U(5)and deformed c-unstable O(6)dynamical symmetries of sd interacting boson model has been investigated by considering a modified O(6)Hamiltonian,providing that the coefficients of the Casimir operator of O(5)are N-dependent,where N is the total number of *** modified O(6)Hamiltonian does not contain the number operator of the d boson,which is responsible for the vibrational *** addition,the deformation features can be achieved without using the SU(3)limit by adding to the O(6)dynamical symmetry the three-body interaction[QQQ]^(0),where Q is the O(6)symmetric quadrupole ***,triaxiality can be generated through the inclusion of the cubic d-boson interaction[d+d+d+]^(3)·∣ddd∣^(3).The classical limit of the potential energy surface(PES),which represents the expected value of the total Hamiltonian in a coherent state,is studied and *** modified O(6)model is applied to the even–even^124-132 Xe *** parameters for the Hamiltonian and the PESs are calculated using a simulated search program to obtain the minimum root mean square deviation between the calculated and experimental excitation energies and B(E2)values for a number of low-lying levels.A good agreement between the calculations and experiment results is found.

关键词： Nuclear structure Extended O(6)of IBm Three-body interactions Coherent state

The Photocycle of Bacteriorhodospin upon Chemical and Physical Treatments

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The Photocycle of Bacteriorhodospin upon Chemical and Physic...

第三届亚洲光谱会议

作者： L.K.Chu C.W.Yen m.a.el-sayed C.W.Cheng Y.P.Lee Department of Chemistry “Tsing Hua University” School of Chemistry and Biochemistry Georgia Institute of Technology

＜正＞Bacteriorhodopsin（b R）is one of the natural photosynthetic systems by converting the solar energy to chemical *** surfactants（chemical treatment）and plasmonic field upon photoexcitation of metallic nanostructures（physical treatment）have been introduced to perturb the photocycle of b ***-state UV-VIS,fluorescence,and

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三重自旋极化,磷光和分子动力学

发光学报 1975年第6期 36-37页

作者： m.a.el-sayed,R.Leyerle,W.Pitts,P.Zinsli 美国加里福尼亚大学化学系美国加里福尼亚大学化学系美国加里福尼亚大学化学系美国加里福尼亚大学化学系

在1.6°K温度下,当芳香族分子三重态的零场（Zf）子能级之间的自旋-晶格弛豫被冻结时,处于最低三重态的两个未配对自旋取向（根据光学检测双共振方法确定）已被用做一种等效自旋标志,它可以确定许多静态和动态分子的性质。在以后的应用... 详细信息

在1.6°K温度下,当芳香族分子三重态的零场（Zf）子能级之间的自旋-晶格弛豫被冻结时,处于最低三重态的两个未配对自旋取向（根据光学检测双共振方法确定）已被用做一种等效自旋标志,它可以确定许多静态和动态分子的性质。在以后的应用中,双共振实验得到在S1→T1非辐射（ISC）过程中产生的振动态之对称性,而不是这个过程的机理。在两个三重态,T和T1（最低三重态）低于S1的情况下,这些方法不能

关键词：三重态零场多重态自旋能分子

无序分子固体中三重态-三重态能量转移的开关及俘获机制

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中国激光 1983年第Z1期 509-509页

作者： JackR.morgan m.a.el-sayed 加州大学洛杉矶分校化学和生物化学系加州大学洛杉矶分校化学和生物化学系

无序固体中离子或分子间的分离是随机变化的。对于固体中不同的分子或离子来说,其光学跃迁能量也可以在很宽的范围变化,从而将导致很大的非均匀线宽(△vinh)。这样就有可能在同一化学样品中且在固体中不同的局部环境中,利用激光发光谱... 详细信息

无序固体中离子或分子间的分离是随机变化的。对于固体中不同的分子或离子来说,其光学跃迁能量也可以在很宽的范围变化,从而将导致很大的非均匀线宽(△vinh)。这样就有可能在同一化学样品中且在固体中不同的局部环境中,利用激光发光谱线变窄技术来研究能量转移及光谱弥散问题。而且,在温度kT△vinh的条件下,能量转移就变成单一方向,即向着跃迁能量等于或低于非均匀加宽内的激光激发施主的能量的那些分子或离子转移。这样,

关键词：三重态多重态能量转移非均匀加宽

Preparation and characterization of (CeO2)x-(Fe2O3)1-x nanocomposites:reduction kinetics and hydrogen storage

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Rare metals 2020年第3期39卷 218-229页

作者： Shimaa G.sayed Waleed m.a.el Rouby Ahmed A.Farghali materials Science and Nanotechnology Department Faculty of Postgraduate Studies for Advanced Science(PSAS)Beni-Suef UniversityBeni Suef62511Egypt

A series of nanosized CeO2-Fe2O3 mixed-oxide nanocomposites with different Ce4+/Fe3+molar ratios were successfully prepared by a co-precipitation *** surface area increased with Fe2O3 content increasing up to 60 wt%in the ***,with further increase in Fe2O3 content,the surface area began to *** reduction processes of the CeO2-Fe2O3 nanocomposites were studied in a hydrogen atmosphere at 300-600℃.The reduction rates increased by increasing both the temperature and Fe2O3 content in the *** microstructure of the reduced composites at 500℃illustrated the presence of a considerable number of macro-and *** activation energy values were calculated which were in the range of 3.56-5.37 kJ mol-1 at the initial stages(up to 35%reduction)and 5.21-10.2 kJ·mol-1 at the final stages(up to 80%reduction)of *** rate-controlling mechanisms in both the initial and final reduction stages were determined,and the initial reaction stage was controlled by combined gaseous diffusion and interfacial chemical reaction mechanisms for all the composites except for pure CeO2,which was controlled by a chemical reaction *** final reaction stage was controlled by a gaseous diffusion mechanism for some composites,while for the others it was controlled by combined gaseous diffusion and interfacial chemical reaction *** hydrogen sorption properties of the nanocomposites were studied by pressure composition isotherms using a volumetric *** storage in the nanocomposites increased by increasing the temperature because of the formation of oxygen vacancies which enhance atomic H adsorption and function as strong adsorption sites forming more metal hydride covalent bonds.

关键词： CeO2-Fe2O3 nanocomposite Reduction kinetics Reduction mechanism Hydrogen storage Oxygen vacancies

On Soft Pre-Rough Approximation Space with Applications in Decision making

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Computer modeling in Engineering & Sciences 2022年第9期132卷 865-879页

作者： m.el sayed Wadia Faid Hassan Al-shameri m.a.el Safty Department of mathematics College of Science and ArtsNajran UniversityNajran66445Saudi Arabia Department of mathematics and Statistics College of ScienceTaif UniversityTaif21944Saudi Arabia

A soft,rough set model is a distinctive mathematical model that can be used to relate a variety of real-life *** the present work,we introduce new concepts of rough set based on soft pre-lower and soft pre-upper approximation *** concepts are soft pre-rough equality,soft pre-rough inclusion,soft pre-rough belonging,soft predefinability,soft pre-internal lower,and soft pre-external *** study the properties of these ***,we use the soft pre-rough approximation to illustrate the importance of our method in decision-making for Chikungunya medical *** reality,the impact factors of Chikungunya’s medical infection were ***,we develop two new algorithms to address Chikungunya virus *** proposed approach is sensible and effective.

关键词： Soft rough set soft pre-rough set approach soft pre-internal lower and soft pre-external upper soft nowhere dense set and Chikungunya medical application intelligence discovery

Decision making on Fuzzy Soft Simply Continuous of Fuzzy Soft multi-Function

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Computer Systems Science & Engineering 2022年第3期40卷 881-894页

作者： m.a.el Safty Samirah Al Zahrani Ansari Saleh Ahmar m.el sayed Department of mathematics and Statistics College of ScienceTaif UniversityTaif 21944Saudi Arabia Department of Statistics Faculty of Mathematics and Natural SciencesUniversitas Negeri MakassarMakassar 90223Indonesia Department of mathematics College of Science and ArtsNajran UniversityNajranSaudi Arabia

Real world applications are dealing now with a huge amount of data,especially in the area of high dimensional *** this article,we depict the simplyupper,the simplylower continuous,we get several characteristics and other properties with respect to upper and lower simply-continuous soft *** also investigate the relationship between soft-continuous,simply-continuous *** also implement fuzzy soft multifunction between fuzzy soft topological spaces which is Akdag’s generation of the *** are introducing a new class of soft open sets,namely soft simplyopen set deduce from soft topology,and we are using it to implement the new approximation space called soft multi-function approach *** for approximation based on a simplyopen *** world must adopt modern studies in order to confront ***,we presented a new decision proposal in this article,compared our proposed approach to the soft relationship introduced by approximation of Xueyou,and concluded that our approach is *** also used our proposal in the medical application that was studied in this paper.

关键词： Soft multifunction soft simplylower soft simplyupper approximation upper inverse of a fuzzy soft multifunction intelligence discovery decision making

Softζ-Rough Set and Its Applications in Decision making of Coronavirus

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Computers, materials & Continua 2022年第1期70卷 267-285页

作者： m.a.el Safty Samirah Al Zahrani m.K.el-Bably m.el sayed Department of mathematics and Statistics College of ScienceTaif UniversityTaif21944Saudi Arabia Department of mathematics Faculty of ScienceTanta UniversityTantaEgypt Department of mathematics College of Science and ArtsNajran UniversityNajran66445Saudi Arabia

In this paper,we present a proposed method for generating a soft rough approximation as a modification and generalization of Zhaowen et *** were obtained between our approach and the previous study and ***,an application on Coronavirus(COVID-19)has been presented,illustrated using our proposed concept,and some influencing results for symptoms of Coronavirus patients have been ***,following these concepts,we construct an algorithm and apply it to a decision-making problem to demonstrate the applicability of our proposed ***,a proposed approach that competes with others has been obtained,as well as realistic results for patients with ***,we used mATLAB programming to obtain the results;these results are consistent with those of theWorld Health Organization and an accurate proposal competing with the method of Zhaowen et *** been ***,it is recommended that our proposed concept be used in future decision making.

关键词： Soft set soft rough set softζrough set COVID-19 intelligence discovery decision making

The micropolar fluid model for blood flow through a tapered artery with a stenosis

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Acta mechanica Sinica 2008年第6期24卷 637-644页

作者： Kh.S.mekheimer m.a.el Kot Department of mathematics Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Department of mathematics Faculty of EducationSuez Canal UniversitySuezEgypt

A micropolar model for axisymmetric blood flow through an axially nonsymmetreic but radially symmetric mild stenosis tapered artery is presented. To estimate the effect of the stenosis shape, a suitable geometry has been considered such that the axial shape of the stenosis can be changed easily just by varying a parameter （referred to as the shape parameter）. The model is also used to study the effect of the taper angle Ф. Flow parameters such as the velocity, the resistance to flow （the resistance impedance）, the wall shear stress distribution in the stenotic region and its magnitude at the maximum height of the stenosis （stenosis throat） have been computed for different values of the shape parameter n, the taper angle Ф, the coupling number N and the micropolar parameter m. It is shown that the resistance to flow decreases with increasing the shape parameter n and the micropolar parameter m while it increases with increasing the coupling number N. So, the magnitude of the resistance impedance is higher for a micropolar fluid than that for a Newtonian fluid model. Finally, the velocity profile, the wall shear stress distribution in the stenotic region and its magnitude at the maximum height of the stenosis are discussed for different values of the parameters involved on the problem.

关键词： micropolar fluid Blood flow Tapered artery

Influence of magnetic field and Hall currents on blood flow through a stenotic artery

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Applied mathematics and mechanics(English Edition) 2008年第8期29卷 1093-1104页

作者： Kh.S.mekheimer m.a.el Kot Department of mathematics Faculty of ScienceAl-Azhar University Nasr City 11884CairoEgypt Department of mathematics Faculty of EducationSuez Canal UniversitySuezEgypt

A micropolar model for blood simulating magnetohydrodynamic flow through a horizontally nonsymmetric but vertically symmetric artery with a mild stenosis is presented. To estimate the effect of the stenosis shape, a suitable geometry has been considered such that the horizontal shape of the stenosis can easily be changed just by varying a parameter referred to as the shape parameter. Flow parameters, such as velocity, the resistance to flow （the resistance impedance）, the wall shear stress distribution in the stenotic region, and its magnitude at the maximum height of the stenosis （stenosis throat）, have been computed for different shape parameters, the Hartmann number and the Hall parameter. This shows that the resistance to flow decreases with the increasing values of the parameter determining the stenosis shape and the Hail parameter, while it increases with the increasing Hartmann number. The wall shear stress and the shearing stress on the wall at the maximum height of the stenosis possess an inverse characteristic to the resistance to flow with respect to any given value of the Hartmann number and the Hall parameter. Finally, the effect of the Hartmann number and the Hall parameter on the horizontal velocity is examined.

关键词： stenotic artery Hall currents blood flow