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塑料封装芯片的腐蚀

电子 1990年第2期 68-76页

作者： Berg,h.m 李志国

Nonlinear dynamical wave structures of Zoomeron equation for population models

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Chinese Physics B 2022年第6期31卷 235-240页

作者： Ahmet Bekir Emad h.m Zahran Neighbourhood of Akcaglan Imarli StreetNumber:28/426030EskisehirTurkey Departments of math.matical and Physical Engineering Benha UniversityFaculty of EngineeringShubraEgypt

The nonlinear dynamical exact wave solutions to the non-fractional order and the time-fractional order of the biological population models are achieved for the first time in the framwork of the Paul-Painlevéapproach.method(PPAm).When the variables appearing in the exact solutions take specific values,the solitary wave solutions will be easily *** realized results prove the efficiency of this technique.

关键词： (2+1)-dimensional non-fractional Zoomeron equation time-fractional biological population model Paul-Painlevéapproach.method traveling wave solutions

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香榭丽舍,向左走,向右走

大美术 2004年第1期 75-80页

作者：周慧玲 h.m

昨夜的梦不曾退尽,记忆就来了,只因那纸上的影像,悄无声息,从桌面上涌来,浮上半醒的眼睛。记忆至于我,常常游走于建筑的形式和风格中,象是惯性抑或职业使然。它偏执地占有了我的情绪,交替于几年来行走异地的片断。有人说,巴黎是集一切... 详细信息

昨夜的梦不曾退尽,记忆就来了,只因那纸上的影像,悄无声息,从桌面上涌来,浮上半醒的眼睛。记忆至于我,常常游走于建筑的形式和风格中,象是惯性抑或职业使然。它偏执地占有了我的情绪,交替于几年来行走异地的片断。有人说,巴黎是集一切于一身的城市,法兰西帝国的伟大与神圣、财富与权力、传统与热烈、机智与随便……它自豪而又任性,充满着矛盾与反差。17-18世纪法国波旁王朝时期。

关键词：香榭丽舍桌面上水泥森林正中央谢丽小筑圈里东征西讨埃菲尔铁塔德芳

A novel sch.me of hybrid entanglement swapping and teleportation using cavity QED in the small and large detuning regimes and quasi-Bell state measurement method

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Chinese Physics B 2016年第10期25卷 45-51页

作者： R Pakniat m K Tavassoly m h Zandi Faculty of Physics Shahid Bahonar University of Kerman Faculty of Physics Atomic and Molecular Group Yazd University Research Group of Optics and Photonics Yazd University

We outline a sch.me for entanglement swapping based on cavity QED as well as quasi-Bell state measurement(quasiBSm) methods. The atom–field interaction in the cavity QED method is performed in small and large detuning *** assume two atoms are initially entangled together and, distinctly two cavities are prepared in an entangled coherent–coherent state. In this sch.me, we want to transform entanglement to the atom-field system. It is observed that, the fidelities of the swapped entangled state in the quasi-BSm method can be compatible with those obtained in the small and large detuning regimes in the cavity QED method(the condition of this compatibility will be discussed). In addition, in the large detuning regime, the swapped entangled state is obtained by detecting and quasi-BSm approaches. In the continuation,by making use of the atom–field entangled state obtained in both approaches in a large detuning regime, we show that the atomic as well as field states teleportation with complete fidelity can be achieved.

关键词： entanglement swapping quantum teleportation cavity QED quasi-Bell state measurement

State-space approach to two-temperature generalized thermoelasticity without energy dissipation of medium subjected to moving heat source

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Applied math.matics and mechanics(English Edition) 2013年第1期34卷 63-74页

作者： h.m.YOUSSEF Department of math.matical Faculty of EducationAlexandria UniversityAlexandria 21527Egypt

In this work, a model of two-temperature generalized thermoelasticity without energy dissipation for an elastic half-space with constant elastic parameters is constructed. The Laplace transform and state-space techniques are used to obtain the general solution for any set of boundary conditions. The general solutions are applied to a specific problem of a half-space subjected to a moving heat source with a constant velocity. The inverse Laplace transforms are computed numerically, and the comparisons are shown in figures to estimate the effects of the heat source velocity and the two-temperature parameter.

关键词： generalized thermoelasticity energy dissipation two-temperature heat source

Influence of mould and Insulation Design on Soundness of Tool Steel Ingot by Numerical Simulation

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Journal of Iron and Steel Research International 2013年第7期20卷 78-83页

作者： m heidarzadeh h Keshmiri Esfarayen Industrial Complex (EICO) Esfarayen *** North Khorasan Iran

The solidification of 4.4 t cold work tool steel ingot type X210Crl2 was simulated by magma software. By the reduction of ingot height, solidification modeling and pouring of a new 3 t ingot were performed and decreasing the porosity formation potential in 3 t ingot in comparison with 4.4 t ingot on the basis of Niyama criterion was ob-served which was in good accordance with experimental data. In order to produce sound ingot, a new 2.8 t ingot mould was designed which includes some parameteric changes in mould such as mould slope, slenderness ratio, mould concavity radius, fillet radius of mould internal corners and feeding diameter to ingot upper diameter ratio. Furthermore, the effects of insulating between kokil and feeding ring and also insulating the outer surface of feeding ring as well as insulating the outer surface of one third of kokil upper part on eenterline porosity formation were in-vestigated in both 2.8 and 4.4 t ingots. The results show that the ingot which was produced in new designed 2.8 t mould has a better Niyama pattern and the centerline porosities were eliminated.

关键词： numerical modeling steel ingot mould parameter porosity

microstructure and mechanical Properties in Dissimilar Butt Friction Stir Welding of Severely Plastic Deformed Aluminum AA 1050 and Commercially Pure Copper Sheets

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Journal of materials Science & Technology 2014年第8期30卷 826-834页

作者： h.Barekatain m.Kazeminezhad A.h.Kokabi Department of materials Science and Engineering Sharif University of TechnologyAzadi AvenueTehranIran

In this study,AA 1050 aluminum alloy and commercially pure copper in annealed and severely plastic deformed conditions were *** technique used for imposing the severe strain to the sheets was constrained groove pressing（CGP） *** annealed and severely plastic deformed sheets were subjected to friction stir welding（FSW） at different rotation and traverse *** was placed in advancing *** offset of approximately 1 mm was used toward Al side for all welds.A range of welding parameters which can lead to acceptable welds with appropriate mechanical properties was *** the FSWed CGPed samples,it was observed that the welding heat input caused grain growth and decrease in hardness value at Al side of the stir *** was found that,generally the weakest parts of weld joints of annealed and CGPed samples were Al base metal and stir zone,*** investigations showed that several forms of intermetallic compounds were produced.

关键词： Friction stir welding Severe plastic deformation Aluminum Copper Intermetallics

Dynamic simulation of beam-like structure with a crack subjected to a random moving mass oscillator

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Earthquake Engineering and Engineering Vibration 2009年第3期8卷 447-458页

作者： m.m.Ettefagh.m.h.Sadeghi m.Rezaee Vibration and modal Analysis Laboratory 51666-14766Department of Mechanical EngineeringUniversity of TabrizTabrizIran

In this paper, dynamic simulation of a beam-like structure with a transverse open crack subjected to a random moving mass oscillator is investigated. The simultaneous effect of a crack and a random oscillator has not been addressed up to now. The crack in the beam at different locations and with different depths is considered as one group of damage, each as an individual imperfection. In addition, bearing immobility is considered as another type of problem in the beam. mass, stiffness, damping and velocity of the oscillator are assumed to be random parameters. An improved perturbation technique is applied to reduce the simulation time. It was found that there is a maximum value of the variance of each uncertain parameter, in which the maximum reliability of the perturbation method can be achieved, and that this maximum value can be obtained by the Alpha-hilber monte-Carlo simulation method. The simulation results reveal that the mass and the velocity uncertainty cause high uncertainty in the deflection of the beam. Also, the pattern of the deflection is not affected by different random oscillator parameters, and as a result, the type of damage can be identified even with high uncertainty. moreover, the deflection in the nodes around the mid-span of the beam provides the best information regarding the imperfections, and consequently leads to the best sensor locations in an actual experiment.

关键词： bridge-vehicle interaction moving mass oscillator random parameters monte-Carlo simulation perturbation method

Spectophotometric method for determination of certain cephalosporins using 4-chloro-7-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl)

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Natural Science 2010年第8期2卷 828-840页

作者： Azza h. rageh Salwa R. El-Shaboury Gamal A. Saleh Fardous A. moh.med 不详

A simple, accurate and precise spectrophotometric method has been proposed for the determination of eleven cephalosporins, namely;cefaclor monohydrate, cefadroxil monohydrate, cefalexin anhydrous, cefradine anhydrous, cefotaxime sodium, cefoperazone sodium, ceftriaxone sodium, ceftazidime penthydrate, cefazolin sodium, cefixime and cefpodoxime pro- xetil in bulk drug and in pharmaceutical formulations. The method depends on hydrolysis of the studied drugs using 0.5m NaOh at 100°C and subsequent reaction of the formed sulfide ions with NBD-Cl (4-chloro-7-nitrobenzo-2-oxa-1, 3-diazole) to form a yellow-colored chromogen measured at 390 nm. Different variables affecting the reaction (e.g. NaOh concentration, hydrolysis time, NBD-Cl concentration and diluting solvent) were studied and optimized. Under the optimum conditions, linear relationships with good correlation coefficients (0.9990- 0.9999) were found in the range of 5-160 μg mL-1 for all studied drugs. The limits of assay detection and quantitiation ranged from 0.289 to 5.867 and from 0.878 to 17.778 μg mL-1;respectively. The accuracy and precision of the proposed method were satisfactory. The method was successfully applied for analysis of the studied drugs in their pharmaceutical formulations and the recovery percentages ranged from 96.6 to 103.5%.

关键词： Spectrophotometry Cephalosporins NBD-Cl Pharmaceutical Analysis