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npj Computational Materials 2019年第1期5卷 345-351页

作者： Ivan Leonov Gregory kh.Rozenberg Igor A.Abrikosov M.N.Miheev Institute of Metal Physics Russian Academy of Sciences620137 YekaterinburgRussia Materials Modeling and Development Laboratory National University of Science and Technology‘MISIS’119049 MoscowRussia School of Physics and Astronomy Tel Aviv University69978 Tel AvivIsrael Department of Physics Chemistry and Biology(IFM)Linköping UniversitySE-58183 LinköpingSweden

The archetypal 3d Mott insulator hematite,Fe_(2)O_(3),is one of the basic oxide components playing an important role in mineralogy of Earth’s lower *** high pressure-temperature behavior,such as the electronic properties,equation of state,and phase stability is of fundamental importance for understanding the properties and evolution of the Earth’s ***,we study the electronic structure,magnetic state,and lattice stability of Fe_(2)O_(3)at ultra-high pressures using the density functional plus dynamical mean-field theory(DFT+DMFT)*** the vicinity of a Mott transition,Fe_(2)O_(3) is found to exhibit a series of complex electronic,magnetic,and structural *** particular,it makes a phase transition to a metal with a post-perovskite crystal structure and site-selective local moments upon compression above 75 *** show that the site-selective phase transition is accompanied by a charge disproportionation of Fe ions,with Fe^(3±δ)and δ~0.05–0.09,implying a complex interplay between electronic correlations and the *** results suggest that site-selective local moments in Fe_(2)O_(3) persist up to ultra-high pressures of~200–250 GPa,i.e.,sufficiently above the core-mantle *** latter can have important consequences for understanding of the velocity and density anomalies in the Earth’s lower mantle.

关键词： magnetic local high

The Classification of Filiform Leibniz Superalgebras of Nilindex n+m

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Acta Mathematica Sinica,English Series 2009年第2期25卷 171-190页

作者： Sh.A.AYUPOV B.A.OMIROV A.kh.khUDOYBERDIYEV Institute of Mathematics and Information Technologies of Academy Sciences of Uzbekistan Department of Mathematics National University of Uzbekistan

In this work the classification of filiform Leibniz superalgebras of nilindex n ＋ m, where n and m （m≠0） are dimensions of even and odd parts, respectively, is obtained.

关键词： Lie superalgebras Leibniz superalgebras nilpotency characteristic sequence

Effect of cold rolling on the microstructural, magnetic, mechanical, and corrosion properties of AISI 316L austenitic stainless steel

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International Journal of Minerals,Metallurgy and Materials 2018年第6期25卷 630-640页

作者： S.Tanhaei kh.Gheisari S.R.Alavi Zaree Department of Materials Science and Engineering Faculty of Engineering Shahid Chamran University of Ahvaz Steel Research Center Faculty of Engineering Shahid Chamran University of Ahvaz

This study has evaluated the effect of different levels of cold rolling（from 0 to 50%）on the microstructural,magnetic,and mechanical properties and the corrosion behavior of 316L austenitic stainless steel in Na Cl（1 mol/L）＋H_2SO_4（0.5 mol/L）*** examinations using optical microscopy revealed the development of a morphological texture from coaxial to elongated grains during the cold-rolling *** analysis carried out on the basis of X-ray diffraction confirmed the formation of the ferromagneticα′-martensite phase under the stresses applied during cold *** finding is in agreement with magnetic measurements using a vibrating sample *** properties determined by tensile and Vickers microhardness tests demonstrated an upward trend in the hardness-to-yield strength ratio with increasing cold-rolling percentage,representing a reduction in the material’s work-hardening *** and localized corrosion parameters were estimated via potentiodynamic polarization corrosion tests and electrochemical impedance *** contrast to the uniform corrosion,wherein the corrosion current density increased with increasing cold-working degree because of the high density of microstructural defects,the passive potential range and breakdown potential increased by cold working,showing greater resistance to pit *** pits were formed,the cold-rolled material repassivation tendency decreased because of the broader hysteresis anodic loop,as confirmed experimentally by observation of the microscopic features after electrochemical cyclic polarization evaluations.

关键词： 316L stainless steel cold rolling morphological texture martensitic phase transformation work-hardening ability repassivation tendency

Bio-inspired optimization algorithms for optical parameter extraction of dielectric materials: A comparative study

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Chinese Physics B 2016年第10期25卷 202-208页

作者： Md Ghulam Saber kh Arif Shahriar Ashik Ahmed Rakibul Hasan Sagor Department of Electrical and Electronic Engineering Islamic University of Technology (IUT) Department of Electrical and Electronic Engineering Northern University Bangladesh (NUB)

Particle swarm optimization(PSO) and invasive weed optimization(IWO) algorithms are used for extracting the modeling parameters of materials useful for optics and photonics research community. These two bio-inspired algorithms are used here for the first time in this particular field to the best of our knowledge. The algorithms are used for modeling graphene oxide and the performances of the two are compared. Two objective functions are used for different boundary values. Root mean square(RMS) deviation is determined and compared.

关键词： optical parameter extraction particle swarm optimization invasive weed optimization graphene oxide optimization

CuPc based organic-inorganic hetero-junction with Au electrodes

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Journal of Semiconductors 2010年第7期31卷 22-25页

作者： Zubair Ahmad Muhammad H.Sayyad kh.S.Karimov Ghulam Ishaq khan Institute of Engineering Sciences and Technology TopiNWFP23460Pakistan Department of Mechanical Engineering 20 Symond Street AucklandUniversity of AucklandNew Zealand

A hetero-junction of n-silicon（n-Si） and copper phthalocyanine（CuPc） has been *** current -voltage characteristics were investigated to explain the rectification and conduction *** effect of temperature and humidity on the electrical properties of n-Si/CuPc hetero-junction has also been *** characteristics of the junction have been observed to be temperature and humidity dependent,so it is suggested that this junction can be used as a temperature and humidity sensor.

关键词： inorganic-organic hetero-junction n-Si CuPc

ON SOLVABILITY OF A BOUNDARY VALUE PROBLEM FOR A NONHOMOGENEOUS BIHARMONIC EQUATION WITH A BOUNDARY OPERATOR OF A FRACTIONAL ORDER

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Acta Mathematica Scientia 2014年第6期34卷 1695-1706页

作者： A.S.BERDYSHEV A.CABADA B.kh.TURMETOV Department of Applied Mathematics and Informatics Kazakh National Pedagogical University named after AbaiAlmatyKazakhstan Departmento de Analise Matematica Facultade de Matematicas University of Santiago de CompostelaSantiago de Compostela Spain khoja Ahmet Yasawi International Kazakh-Turkish University Kazakhstan

This paper is concerned with the solvability of a boundary value problem for a nonhomogeneous biharmonic equation. The boundary data is determined by a differential operator of fractional order in the Riemann-Liouvill... 详细信息

关键词： biharmonic equation boundary value problem fractional derivative the RiemannLiouville operator

Calculating the thermal properties of 93,94,95Mo using the BCS model with an average value gap parameter

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Nuclear Science and Techniques 2017年第9期28卷 81-86页

作者： V. Dehghani Gh. Forozani kh. Benam Physics Department Faculty of Sciences University of Sistan and Baluchestan Zahedan Iran Physics Department Bu-Ali Sina University Hamedan Iran

The gap parameter of the standard BCS model is replaced by the order parameter of the modified Ginzburg–Landau theory. Using this new form of the BCS model, the energy, entropy, and heat capacity of ^(93,94,95)Mo nuclei are calculated. The results are compared with the experimental data and standard BCS results. Since the order parameter does not drop to zero at a critical temperature, our results for thermal properties are free of singularities. We have shown that the heat capacity as a function of temperature behaves smoothly and it is highly in agreement with the experimental heat capacity, while heat capacity behaves singularly and discontinuously in the standard BCS model.A smooth peak in the heat capacity is observed which is interpreted as a signature of the transition from the superfluid to the normal phase.

关键词： BCS模型模型参数计算热性能平均值金兹堡-朗道理论差距实验数据

Electrical characterization of the organic semiconductor Ag/CuPc/Au Schottky diode

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Journal of Semiconductors 2011年第4期32卷 52-56页

作者： Mutabar Shah M.H.Sayyad kh.S.Karimov Ghulam Ishaq khan Institute of Engineering Sciences and Technology physical Technical Institute of Academy of Sciences

This paper reports on the fabrication and investigation of a surface-type organic semiconductor copper phthalocyanine（CuPc） based diode.A thin film of CuPc of thickness 100 nm was thermally sublimed onto a glass substrate with preliminary deposited metallic electrodes to form a surface-type Ag/CuPc/Au Schottky *** current-voltage characteristics were measured at room temperature under dark *** barrier height was calculated as 1.05 *** values of mobility and conductivity was found to be 1.74×10;cm;/（V·s） and 5.5×10;Ω;·cm;,*** low voltages the device showed ohmic conduction and the space charge limited current conduction mechanisms were dominated at higher voltages.

关键词： Schottky diode copper phthalocyanine thin film organic semiconductor mobility

Assessment of strain effect of strong-motion (focus) zones of earthquakes on earth＇s surface displacement

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Geodesy and Geodynamics 2017年第1期8卷 34-40页

作者： kh.L. khamidov Institute of Seismology of the Academy of Sciences of the Republic of Uzbekistan Tashkent Uzbekistan

Strain effect of focal zones on fore-seismic displacements of earth＇s surface is studied in the paper for real conditions of focus zones of the earthquakes. The width of the interval of maximum displace- ments is determined by the conditions of potential focus of tectonic earthquake. The solution of elastic problem for half-space with soft inclusion is used. Calculations are conducted also by empirical formulas, obtained for similar stress states. Possible radius of the zone of maximum revelation of strain anomaly is determined on the basis of the growth of rupture scale and change in heterogeneity volume. It is shown that obtained expression covers a wider range of magnitude variations with consideration of the interval of scale change in upcoming rupture-forming zone. In the example of Tashkent （1966） and Gazli （1984） strong ground motions, an analysis of possible strains occurrence on the Earth＇s surface was conducted.

关键词： StrainStrong-motion zoneDisplacementEarth's surfaceRadius of strain effectMagnitudeMagnetic effectEarthquake

The biological function of type I receptors of bone morphogenetic protein in bone

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Bone Research 2016年第2期4卷 63-71页

作者： Shuxian Lin Kathy kh Svoboda Jian Q Feng Xinquan Jiang Department of Prosthodontics Ninth People’s Hospital Affiliated with Shanghai Jiao Tong University School of Medicine Department of Biomedical Sciences Texas A&M Baylor College of Dentistry

Bone morphogenetic proteins （BMPs） have multiple roles in skeletal development, homeostasis and regeneration. BMPs signal via type I and type II serine/threonine kinase receptors （BMPRI and BMPRII）. In recent decades, genetic studies in humans and mice have demonstrated that perturbations in BMP signaling via BMPRI resulted in various diseases in bone, cartilage, and muscles. In this review, we focus on all three types of BMPRI, which consist of activin-like kinase 2 （ALK2, also called type IA activin receptor）, activin- llke kinase 3 （ALK3, also called BMPRIA）, and activin-like kinase 6 （ALK6, also called BMPRIB）. The research areas covered include the current progress regarding the roles of these receptors during myogenesis, chondrogenesis, and osteogenesis. Understanding the physiological and pathological functions of these receptors at the cellular and molecular levels will advance drug development and tissue regeneration for treating musculoskeletal diseases and bone defects in the future.

关键词： ALK The biological function of type I receptors of bone morphogenetic protein in bone type