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Chinese Physics B 2014年第7期23卷 417-428页

作者： H R Baghshahi m k Tavassoly A Behjat Atomic and molecular Group Faculty of PhysicsYazd University The Laboratory of Quantum Information Processing Yazd University Department of Physics Faculty of ScienceVali-e-Asr University of Rafsanjan Photonics Research Group Engineering Research CenterYazd University

The interaction between a two-level atom and a single-mode field in the k-photon Jaynes-Cummings model （JCm） in the presence of the Stark shift and a kerr medium is studied. All terms in the Hamiltonian, such as the single-mode field, its interaction with the atom, the contribution of the Stark shift and the kerr medium effects are considered to be f-deformed. In particular, the effect of the initial state of the radiation field on the dynamical evolution of some physical properties such as atomic inversion and entropy squeezing are investigated by considering different initial field states （coherent, squeezed and thermal states）.

关键词： Jaynes-Cummings model entropy squeezing atomic inversion intensity-dependent coupling

Influence of Lanthanum on the microstructural and Dielectric Properties of Polycrystalline Ba(Ti0.5Fe0.5)O3

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Chinese Physics Letters 2012年第4期29卷 213-216页

作者： m.R.Shah A.k.m.Akther Hossain Department of Physics Primeasia UniversityBananiDhaka-1213Bangladesh Department of Physics Bangladesh University of Engineering and TechnologyDhaka-1000Bangladesh

Various polycrystalline Ba1-x Lax (Ti0.5 Fe0.5 )O3 are prepared by using the standard solid state reaction *** shaped samples prepared from each composition are sintered at 1200℃ for 5 h.X-ray diffraction patterns of these compositions confirm the formation of a single phase perovskite *** lattice parameters are decreased but the average grain size increases with the increase of La *** dielectric constant,dielectric loss and ac conductivity are studied as a function of frequency for various compositions,and their behaviors are explained on the basis of the maxwell-Wagner model A three-times enhancement of the dielectric constant is observed with the increase of La content.

关键词： Ti structure technique

Synthesis, Characterization and Corrosion Inhibitive Properties of New Thiazole Based Polyamides Containing Diarylidenecyclohexanone moiety

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Chinese Journal of Polymer Science 2015年第1期33卷 1-13页

作者： k.I.Aly m.A.Hussein Polymer Chemistry Lab. 122 Chemistry Department Faculty of Science Assiut University Assiut 71516 Egypt Chemistry Department Faculty of Science King Abdulaziz UniversityJeddah 21589 Kingdom of Saudi Arabia

The present work aimed to synthesize a new interesting series of thiazole based polyamides containing diarylidenecyclohexanone moiety 5a-5f using low temperature solution polycondensation technique. The new polymers were synthesized by the reaction of thiazole based monomer namely, bis（2-aminothiazol-4-ylbenzylidene）cyclohexanone 3 with different aliphatic and aromatic diacid chlorides using NmP, and in the presence of anhydrous Li Cl as catalyst. Adipoyl, sebacoyl, oxaloyl, terephthaloyl, isophthaloyl dichlorides and biphenyl dicarbonyl dichloride were used as diacid chlorides. The structure of the model compound 4 as well as the new polymers was confirmed by correct elemental and spectral analyses. The thermal properties of those polymers were evaluated by TGA and DTG measurements and correlated to their structural units, beside X-ray diffraction analysis, solubility and viscometry measurements. The inherent viscosities for the synthesized polymers were in the range 0.6–1.03 d L/g. On the other hand the corrosion inhibitive properties of monomer 3 as well as polyamides 5d and 5f as selected examples were carried out on carbon-steel in 0.5 mol/L H2SO4 at 40 °C. The calculated inhibition efficiency（IE%） for polymer 5d was in the range（82 ± 6）% in all selected concentrations. The best value of IE% was obtained at 1 mg/L to reach 98.24% for polymer 5d and at 0.5 mg/L to reach 87.75% for polymer 5f.

关键词： Diarylidenecyclohexanone Polyamides Synthesis Characterization Thiazole Corrosion inhibitive properties.

Influence of Heat Input on martensite Formation and Impact Property of Ferritic-Austenitic Dissimilar Weld metals

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Journal of materials Science & Technology 2012年第4期28卷 343-352页

作者： m. mukherjee T.k. Pal Welding Technology Centre Metallurgical and Material Engineering Department Jadavpur University

The effect of heat input on martensite formation and impact properties of gas metal arc welded modified ferritic stainless steel （409m） sheets （as received） with thickness of 4 mm was described in detail in this work. The welded joints were prepared under three heat input conditions, i.e. 0.4, 0.5 and 0.6 kJ/mm using two different austenitic filler wires （308L and 316L） and shielding gas composition of Ar ＋ 5% CO2. The welded joints were evaluated by microstructure and charpy impact toughness. The dependence of weld metal microstructure on heat input and filler wires were determined by dilution calculation, Creq/Nieq ratio, stacking fault energy （SFE）, optical microscopy （Om） and transmission electron microscopy （TEm）. It was observed that the microstructure as well as impact property of weld metal was significantly affected by the heat input and filler wire. Weld metals prepared by high heat input exhibited higher amount of martensite laths and toughness compared with those prepared by medium and low heat inputs, which was true for both the filler wires. Furthermore, 308L weld metals in general provided higher amount of martensite laths and toughness than 316L weld metals.

关键词： Heat input Ferritic-austenitic dissimilar weld martensite Grain size Toughness

Tensile and Impact Properties of Shielded metal Arc Welded AISI 409m Ferritic Stainless Steel Joints

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Journal of materials Science & Technology 2009年第2期25卷 181-186页

作者： k. Shanmugam A.k. Lakshminarayanan V. Balasubramanian Centre for materials Joining & Research (CEmAJOR) Department of Manufacturing Engineering Annamalai UniversityAnnamalai Nagar 608 002 Tamil Nadu India

The present study is concerned with the effect of filler metals such as austenitic stainless steel, ferritic stainless steel and duplex stainless steel on tensile and impact properties of the ferritic stainless steel conforming to AISI 409m grade. Rolled plates of 4 mm thickness were used as the base material for preparing single pass butt welded joints. Tensile and impact properties, microhardness, microstructure and fracture surface morphology of the joints fabricated by austenitic stainless steel, ferritic stainless steel and duplex stainless steel filler metals were evaluated and the results were reported. From this investigation, it is found that the joints fabricated by duplex stainless steel filler metal showed higher tensile strength and hardness compared to the joints fabricated by austenitic and ferritic stainless steel filler metals. Joints fabricated by austenitic stainless steel filler metal exhibited higher ductility and impact toughness compared with the joints fabricated by ferritic stainless steel and duplex stainless steel filler metals.

关键词： Ferritic stainless steel Shielded metal arc welding Tensile properties Impact toughness

Nonlinear Quantum Optical Springs and Their Nonclassical Properties

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Communications in Theoretical Physics 2011年第8期56卷 327-332页

作者： m.J.Faghihi m.k.Tavassoly Atomic and molecular Group Faculty of PhysicsYazd University

The original idea of quantum optical spring arises from the requirement of quantization of the frequency of oscillations in the Hamiltonian of harmonic oscillator. This purpose is achieved by considering a spring whose constant （and so its frequency） depends on the quantum states ofanother system. Recently, it is realized that by the assumption of frequency modulation of ω to ω √1＋ μα＋α the mentioned idea can be established. In the present paper, we generalize the approach of quantum optical spring with particular attention to the dependence or trequency to the intensity of radiation field that naturally observes in the nonlinear coherent states, from which we arrive at a physical system has been called by us as nonlinear quantum optical spring. Then, after the introduction of the generalized tlamiltonian of nonlinear quantum optical spring and it＇s solution, we will investigate the nonclassical properties of the obtained states. Specially, typical collapse and revival in the distribution functions and squeezing parameters, as particular quantum features, will be revealed.

关键词： nonlinear coherent states quantum optical spring nonclassical states

Creation of Super Long Transversely Polarized Optical Needle Using Azimuthally Polarized multi Gaussian Beam

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Chinese Physics Letters 2016年第6期33卷 29-32页

作者： C.m.Sundaram k.Prabakaran P.m.Anbarasan k.B.Rajesh A.m.musthafa Department of Physics Periyar University Department of Physics Mahendra Arts and Science College(Autonomous) Department of Physics Chikkanna Government Arts College Department of General Studies(Physics Group) Jubail University College(Male Branch)Royal Commission of Jubail

The intensity distribution in the focal region of a high-NA lens for the incident azimuthally polarized multi Gaussian beam transmitted through a multi belt spiral phase hologram is studied on the basis of the vector diffraction theory. Here we report a new method used to generate a needle of transversely polarized light beam with sub diffraction beam size of 0.366A that propagates without divergence over a long distance of about 22A in free space. We also expect that such a light needle of transversely polarized beam may find its applications in utilizing optical materials or instruments responsive to the transversal field only.

关键词： of on it for Creation of Super Long Transversely Polarized Optical Needle Using Azimuthally Polarized multi Gaussian Beam in that is

Pressure Dependence of the Small-Signal Gain and Saturation Intensity of a Copper Bromide Laser

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Chinese Physics Letters 2017年第8期34卷 55-58页

作者： m. E. Aeinehvand S. Behrouzinia m. k. Salem m, Elahei k. khorasani Plasma Physics Research Center Science and Research branch Islamic Azad University Tehran Iran Photonics and Quantum Technologies Research School Nuclear Science and Technology Research School Tehran Iran

A pair of copper bromide lasers in an oscillator–amplifier configuration is used to investigate the small signal gain and saturation intensity as amplifying parameters and output power of lasers, versus pressure of buffer gas. It is shown that the amplifying parameters and laser output power have a maximum value at optimum buffer gas pressure of 11？Torr. The challenge between microscopic parameters such as stimulated emission cross section, laser upper level lifetime, and population inversion, which determine the values of laser characteristics respective to the operational pressure of buffer gas, are investigated. Thus an optimum delay time of about 10？ns is determined, and a maximum output power equivalent to about 12？W is extracted. The amplifying parameters and measured output power of laser versus delay times show some local maxima and minima at the delay time interval of 6–43？ns.

关键词： In CBL Pressure Dependence of the Small-Signal Gain and Saturation Intensity of a Copper Bromide Laser

The Fundamentals Underlying the Computations of Acceleration for General Dynamic Applications:Issues and Noteworthy Perspectives

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Computer modeling in Engineering & Sciences 2015年第2期104卷 133-158页

作者： m.Shimada A.Hoitink k.k.Tamma Department of mechanical Engineering University of Minnesota111 Church St.SEMinneapolisMN55455USA.

To-date,with the exception of the Newmark method and the midpoint rule,most computational algorithms under the umbrella of LmS methods,which are predominantly employed in research and commercial software fail to properly evaluate acceleration computations accurately for conducting the numerical dynamic ***,this is not trivial and a sound theoretical basis of the fundamental underlying issues is described in *** this paper,we provide a resolution and point-out several noteworthy perspectives to address the proper evaluation of acceleration computations for structural dynamics applications with focus on the class of LmS methods as an illustration.

关键词： acceleration trivial illustration

Influence of pH of spray solution on optoelectronic properties of cadmium oxide thin films

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Journal of Semiconductors 2015年第3期36卷 29-34页

作者： R.m.Hodlur m.k.Rabinal Department of Physics Karnatak University

Highly conducting transparent cadmium oxide thin films were prepared by the conventional spray pyrolysis technique. The pH of the spray solution is varied by adding ammonia/hydrochloric acid. The effect of pH on the morphology, crystallinity and optoelectronic properties of these films is studied. The structural analysis showed all the films in the cubic phase. For the films with pH 〈 7（acidic condition）, the preferred orientation is along the（111） direction and for those with pH 〉7（alkaline condition）, the preferred orientation is along the（200） direction.A lowest resistivity of 9.9×10^4 cm（with carrier concentration D5.1×10^20cm^3, mobility D12.4 cm^2/（V s））is observed for pH12. The resistivity is tuned almost by three orders of magnitude by controlling the bath pH with optical transmittance more than 70%. Thus, the electrical conductivity of CdO films could be easily tuned by simply varying the pH of the spray solution without compromising the optical transparency.

关键词： spray pyrolysis pH cadmium oxide thin films electrical conductivity