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眼泪与圣徒

SOme OSCILLATION CRITeRIA FOR SeCOND ORDeR NONLINeAR FUNCTIONAL ORDINARY DIFFeReNTIAL eQUATIONS

作者： (法)e.m. 齐奥朗

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Acta mathematica Scientia 2007年第3期27卷 602-610页

作者： e.m.e.Zayed m.A.el-moneam mathematics Department Faculty of ScienceZagazig UniversityZagazigEgypt

The.m.in objective of this article is to study the oscillatory behavior of the solutions of the following nonlinear functional differential equations（a（t）x＇（t））＇＋δ1p（t）x＇（t）＋δ2q（t）f（x（g（t））） = 0,for 0 ≤ to≤ t, where 51 = ：el and δ±1. The functions p,q,g ： [t0, ∞） → R, f ： R → are continuous, a（t）〉 0,p（t） ≥0,q（t）〉 0 for t ≥ to,lirn g（t） = ∞, and q is not identically zero on any subinterval of [to, ∞）. moreover, the functions q（t）, g（t）, and a（t） are continuously differentiable.

关键词： Oscillatory and nonoscillatory solutions nonlinear functional differential equations

Superplasticity-like creep behavior of coarse grained ternary Al alloys

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Transactions of Nonferrous metals Society of China 2010年第4期20卷 564-571页

作者：乔军 e.m.TALeFF College of materials Science and engineering University of Science and Technology Liaoning Department of mechanical engineering University of Texas at Austin

enhanced tensile ductilities in coarse grained Al-mg-Zn and Al-mg-Fe.m.terials were *** materials were Al-2mg-5Zn,Al-3mg-5Zn,Al-4mg-5Zn,Al-3mg-0.11Fe,Al-3mg-0.27Fe,and *** elongation-to-failure tests were conducted at constant cross-head speed and constant temperatures from 300 to 450℃.Strain rate change tests were conducted at a constant temperature from 300 to 450℃and in strain-rate range from 4.31×10-5to 1.97×*** results show that over 100%ductilities are consistently achieved in these *** superplasticity-like behavior is rate-controlled by solute-drag *** ternary Zn and Fe additions do not have an adverse effect on solute-drag creep and ductility,they increase stress exponent and its sensitivity to mg content during solute-drag creep.

关键词： Al-mg alloys superplasticity solute-drag creep tensile ductility strain-rate sensitivity

monte Carlo simulation of lattice analysis of complex LaCeTh0.1CuOy using ion bombardment technique

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Nuclear Science and Techniques 2020年第3期31卷 20-34页

作者： m.e.emetere Department of Physics Covenant University Canaanland Department of mechanical engineering Science University of Johannesburg

Ion bombardment analysis of perovskite.m.terials is challenging owing to their peculiar *** shortcoming renders the reliability on the technique somewhat *** this research,three structured modifications(i.e.,scan angle,low energy,and large ion bombardment)were adopted to improve the ion bombardment analysis of 99,999 ions using monte Carlo *** modified technique was used to analyze the effects of a chemically pressurized‘‘A’’site in the perovskite lattice *** LaCeTh0.1Cu2Oy compound was used in this *** the low probing energy,it was observed that the high number of ions bombarding the.m.terial resulted in external pressure on the lattice structure of the ***,the chemically pressurized‘‘A’’site perovskite.m.terial was characterized by lattice.m.smatch,lattice fluctuations,grain boundary collapse,and oxygen *** novel discovery of this research is the inter-and intra-extended lattice.m.smatches that are likely to ***,further investigation of the connection between inter-and intraextended lattice.m.smatches is recommended as they may enable fabrication of room-temperature superconductors.

关键词： Lattice.m.smatch Ion bombardment Chemical pressure Scan angle

Buckling and large deflection behaviors of radially functionally graded ring-stiffened circular plates with various boundary conditions

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Applied mathematics and mechanics(english edition) 2016年第9期37卷 1131-1152页

作者： m.e.GOLmAKANI m.emAmI Department of mechanical engineering Mashhad BranchIslamic Azad University

The buckling and large deflection behaviors of axis-symmetric radially functionally graded （RFG） ring-stiffened circular plates are investigated by the dynamic relaxation （DR） method combined with the finite difference discretization technique. The.m.terial properties of the constituent components of the RFG plate are assumed to vary continuously according to the.m.ri-Tanalka distribution along the radial direction. The nonlinear governing equations are obtained in the incremental form based on the firstorder shear deformation plate theory （FSDT） and the von Karman relations for large deflection. In the buckling analysis, an external in-plane load is applied to the plate in- crementally so that, in each load-step, the incremental form of the governing equations can be solved by a numerical code prepared based on the DR method. After converging the DR code in the first increment, the latter load-step is added to the previous one, and the program is repeated again. The critical buckling load is dete.m.ned from the compressive load-displacement curve obtained by solving the incremental form of the governing equations. Based on the present incremental form of formulation, a bending analysis can also be conducted if the whole load is applied simultaneously. Finally, a detailed parametric study is carried out to investigate the influences of various boundary conditions, grading indices, thickness-to-radius ratios, stiffener＇s positions and depths on the critical buckling load, and displacements and stresses resulted from the bending analysis. It is observed that the effect of the stiffener on the results is much greater in the functionally graded plate with higher material grading indices. The results also reveal that, by increasing the depth of the stiffer, the values of ascending the critical buckling load are approximately identical for both simply supported and clamped boundary conditions.

关键词： buckling large deflection functionally graded stiffened plate dynamicrelaxation method

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供词与放逐

北京文学（中篇小说月报） 2024年第2期 198-206页

作者： [法]e.m.齐奥朗赵苓岑(译) 不详

e.m.齐奥朗(1911-1995),法籍罗马尼亚裔哲学家和文学家,代表作有《在绝望之巅》《苦论》《解体概要》等。在上个世纪群星闪耀、众声宣哗的思想界,齐奥朗选择了离群索居,他一生隐居在巴黎,从不接受采访,在自己创造的孤独中失眠、抑郁、... 详细信息

e.m.齐奥朗(1911-1995),法籍罗马尼亚裔哲学家和文学家,代表作有《在绝望之巅》《苦论》《解体概要》等。在上个世纪群星闪耀、众声宣哗的思想界,齐奥朗选择了离群索居,他一生隐居在巴黎,从不接受采访,在自己创造的孤独中失眠、抑郁、写作、思考苏珊·桑塔格认为:齐奥朗是当今思想最精细、写作最具力量的人之一。诺曼·马内阿说:他是一位杰出的反叛者,也是一位独具怀疑精神的厌世者,一而再再而三地让我们在人类存在的虚无中惊醒过来。齐奥朗后现代主义碎片式的文体风格,范诞而又清醒,绝望而又充满温情的精神世界,暗合了当今一些年轻人的心理状态,因而有人将他视为当下流行的“发疯文学”的鼻祖,本期我们选载《供词与放逐》中的部分内容,供大家了解齐奥朗的思想与写作。

关键词：怀疑精神苏珊·桑塔格反叛者齐奥文体风格群星闪耀心理状态碎片式

DNA Dynamics Studied Using the Homogeneous Balance.m.thod

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Chinese Physics Letters 2012年第8期29卷 9-11页

作者： e.m.e.Zayed A.H.Arnous mathematics Department Faculty of ScienceZagazig UniversityP.O.Box 44519ZagazigEgypt

We employ the homogeneous balance.m.thod to construct the traveling waves of the nonlinear vibrational dynamics modeling of *** new explicit forms of traveling waves are *** is shown that this method provides us with a powerful mathematical tool for solving nonlinear evolution equations in mathematical *** and weaknesses of the proposed method are discussed.

关键词： traveling nonlinear method

The Asymptotics of the Heat Semigroup for a General Bounded Domain with mixed Boundary Conditions

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Acta mathematica Sinica,english Series 2000年第4期16卷 627-636页

作者： e. m. e. Zayed mathematics Department. Faculty of Science. Zagazig University. Zagazig. egypt

Small-time asymptotics of the trace of the heat semigroup θ（t）=Σv=1x exp（-tμv）. where {μv} are the eigenvalues of the uegative Laplacian -Δ= -Σβ=12（/xβ）2 in the （x1, x2）-plane. is studied for a general bounded domain Ω with a smooth boundary Ω. where a finite number of Dirichlet. Ne.m.nn and Robin boundary conditions, on the piecewise smooth parts Γi（i=1, ..., n） of )Ω such that)Ω=∪i=1nΓ are considered. Some ge.m.trical properties associated with Ω are dete.m.ned

关键词： Heat semigroup Inverse problem mixed boundary conditions eigenvalues

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