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Quantitative Structure-retention Relationship Analysis of Nanoparticle Compounds by GA-PLS,GA-KPLS and L-M ANN

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Chinese Journal of Structural Chemistry 2012年第4期31卷 569-573页

作者： Hadi Noorizadeh Abbas Farmany Mehrab Noorizadeh Faculty of Science Islamic Azad University young Researchers Club Ilam BranchIslamic Azad University

Genetic algorithm and partial least square（GA-PLS）,kernel PLS（KPLS） and Levenberg-Marquardt artificial neural network（L-M ANN） techniques were used to investigate the correlation between retention time（RT） and descriptors for 15 nanoparticle compounds obtained by the comprehensive two-dimensional gas chromatography system（GC × GC）.Application of the dodecanethiol monolayer-protected gold nanoparticle（MPN） column was for a high-speed separation as the second column of GC × *** L-M ANN model with the final optimum network architecture of [13-5-1] gave a significantly better performance than the other *** is the first research on the quantitative structure-retention relationship（QSRR） of nanoparticle compounds using the GA-PLS,GA-KPLS and L-M ANN.

关键词： nanoparticle compounds comprehensive two-dimensional gas chromatography system monolayer-protected gold nanoparticle genetic algorithm-kernel partial least squares Levenberg-Marquardt artificial neural network

Spin-valley Hall conductivity of doped ferromagnetic silicene under strain

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Chinese Physics B 2017年第1期26卷 410-416页

作者： Bahram Shirzadi Mohsen Yarmohammadi Department of Physics Razi University Kermanshah Iran young Researchers and Elite Club Kermanshah Branch Islamic Azad University Kermanshah Iran

The spin-valley Hall conductivity（SHC-VHC） of two-dimensional material ferromagnetic graphene＇s silicon analog,silicene, is investigated in the presence of strain within the Kubo formalism in the context of the Kane–Mele *** Dirac cone approximation has been used to investigate the dynamics of carriers under the strain along the armchair（AC） direction. In particular, we study the effect of external static electric field on these conductivities under the *** the presence of the strain, the carriers have a larger effective mass and the transport decreases. Our findings show that SHC changes with respect to the direction of the applied electric field symmetrically while VHC increases ***, the reflection symmetry of the structure has been broken with the electric field and a phase transition occurs to topological insulator for strained ferromagnetic silicene. A critical strain is found in the presence of the electric field around 45%. SHC（VHC） decreases（increases） for strains smaller than this value symmetrically while it increases（decreases） for strains larger than one.

关键词： ferromagnetic silicene Kubo formalism strain spin-valley conductivity

Zero-Bias Conductance versus Potential Strength of Interface in Ferromagnetic Superconductors

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Chinese Physics Letters 2012年第3期29卷 201-203页

作者： Hamidreza Emamipour Jafar Emamipour Department of Physics Ilam UniversityIlamIran young Researchers Club Ilam BranchIslamic Azad UniversityIlamIran

We study zero-bias conductance(ZBC)spectra of a normal-metal/insulator/singlet(and triplet)ferromagnetic superconductor as a function of potential strength of interface in the Blonder-Tinkham Klapwijk(BTK)theory *** consider possible pairing states including spin singlet s-wave pairing(SWP),spin triplet opposite spin pairing(OSP)and spin triplet equal spin pairing(ESP).It is found that ZBC as a function of potential strength of interface shows a clear difference between SWP,OSP and ESP *** results may serve as a useful tool for discriminating pairing states in ferromagnetic superconductors.

关键词： ferromagnetic singlet interface

Bound states of Dirac fermions in monolayer gapped graphene in the presence of local perturbations

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Chinese Physics B 2016年第6期25卷 563-568页

作者： Mohsen Yarmohammadi Malek Zareyan young Researchers and Elite Club Kermanshah BranchIslamic Azad University Department of Physics Institute for Advanced Studies in Basic Sciences (IASBS)

In graphene,conductance electrons behave as massless relativistic particles and obey an analogue of the Dirac equation in two dimensions with a chiral *** this reason,the bounding of electrons in graphene in the form of geometries of quantum dots is *** gapless graphene,due to its unique electronic band structure,there is a minimal conductivity at Dirac points,that is,in the limit of zero *** creates a problem for using such a highly motivated new material in electronic *** of the ways to overcome this problem is the creation of a band gap in the graphene band structure,which is made by inversion symmetry breaking（symmetry of sublattices）.We investigate the confined states of the massless Dirac fermions in an impured graphene by the short-range perturbations for ＂local chemical potential＂ and ＂local gap＂.The calculated energy spectrum exhibits quite different features with and without the perturbations.A characteristic equation for bound states（BSs） has been *** is surprisingly found that the relation between the radial functions of sublattices wave functions,i.e.,f_m~＋（r）,g_m~＋（r）,and f_m^-（r）,g_m^-（r）,can be established by SO（2） group.

关键词： monolayer gapped graphene quantum dots bound states inversion symmetry breaking

Relativistic effect of pseudospin symmetry and tensor coupling on the Mie-type potential via Laplace transformation method

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Chinese Physics B 2014年第12期23卷 44-49页

作者： M.Eshghi S.M.Ikhdair young Researchers and Elite Club Central Tehran Branch Islamic Azad University Department of Physics Faculty of Science An-Najah National University

A relativistic Mie-type potential for spin-1/2 particles is studied. The Dirac Hamiltonian contains a scalar S（r） and a vector V（r） Mie-type potential in the radial coordinates, as well as a tensor potential U（r） in the form of Coulomb potential. In the pseudospin（p-spin） symmetry setting Σ = Cps and Δ = V（r）, an analytical solution for exact bound states of the corresponding Dirac equation is found. The eigenenergies and normalized wave functions are presented and particular cases are discussed with any arbitrary spin–orbit coupling number κ. Special attention is devoted to the caseΣ = 0 for which p-spin symmetry is exact. The Laplace transform approach（LTA） is used in our calculations. Some numerical results are obtained and compared with those of other methods.

关键词： Dirac equation Mie-type potential Laplace transform approach tensor interaction p-spin symmetry

INVESTIGATION INTO MORPHOLOGY, MICROSTRUCTURE AND PROPERTIES OF SBR/EPDM/ORGANO MONTMORILLONITE NANOCOMPOSITES

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Chinese Journal of Polymer Science 2013年第4期31卷 660-669页

作者： Massud Durandish Abdolmajid Alipour Zarghan Branch Islamic Azad UniversityZarghanIran young Researchers Club Zarghan BranchIslamic Azad UniversityZarghanIran

Rubber compounds based on styrene-butadiene rubber/ethylene propylene diene monomer blends of different compositions （60/40, 70/30, 80/20, 90/10, 100/0） reinforced with 1 wt%, 3 wt%, 5 wt% and 7 wt% organoclay （Cloisite 20A） were prepared on a two roll mill via a vulcanization process and characterized by several techniques. Results of X-ray diffraction showed expansion of the inter-gallery distance, and transmission electron microscopy （TEM） micrographs confirmed that the prepared nanocomposite samples have intercalated and partially exfoliated structures. Cure characteristics showed that, organoclay not only accelerates the vulcanization reaction, but also gives rise to a marked increase of the torque, indicating crosslink density of the prepared compounds increases at the presence of organoclay. Mechanical properties of samples received markedly increase by clay loading due to the good interaction established between nanoclay particles and polymer matrix as it was evidenced by SEM photomicrographs. At the same time, rheological properties showed that addition of nanoclay could improve storage modulus as well as complex viscosity of SBR/EPDM samples. The results of ozone test revealed that the ozone resistance of samples significantly increases as nanoclay or EPDM content increases.

关键词： Nanoclay SBR/EPDM nanocomposite Morphological properties Mechanical and rheological measurements TEM and SEM Photomicrographs.

Transient thermal behavior of radial fins of rectangular,triangular and hyperbolic profiles with temperature-dependent properties using DTM-FDM

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Journal of Central South University 2017年第3期24卷 675-682页

作者： Sobhan Mosayebidorcheh Mohammad Rahimi-Gorji D.D Ganji Taha Moayebidorcheh O Pourmehran M.Biglarian young Researchers and Elite Club Najafabad BranchIslamic Azad UniversityNajafabadIran young Researchers and Elite Club Gorgan BranchIslamic Azad UniversityGorganIran Mechanical Engineering Department Babol University of TechnologyBabolMazandaranIran Department of Mechanical Engineering Sharif University of TechnologyTehranIran

This work focuses on transient thermal behavior of radial fins of rectangular,triangular and hyperbolic profiles with temperature-dependent properties.A hybrid numerical algorithm which combines differential transformation(DTM) and finite difference(FDM) methods is utilized to theoretically study the present *** and FDM are applied to the time and space domains of the problem,*** accuracy of this method solution is checked against the numerical ***,the effects of some applicable parameters were studied *** a broad range of governing parameters are investigated,the results could be useful in a number of industrial and engineering applications.

关键词： transient thermal behavior radial fin thermal conductivity temperature-dependent property hybrid differential transformation-finite difference (DTM-FDM)

A KINETIC APPROACH TO SCALAR MULTI-DIMENSIONAL CONSERVATION LAWS

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Acta Mathematica Scientia 1996年第2期16卷 218-228页

作者：胡家信 young Scientists Laboratory of Wuhan Inst. of Math. Sci. Academia Sinica Wuhan 430071 China

This paper gives the kinetic formation of multi-dimensional conservation laws and proves the compactness of velocity averages by employing the compactness theorem in L(loc)(1)(R(n) x R(t)). As a by product, the existe... 详细信息

关键词： conservation law generalized solution kinetic equation

A Spectral Method for the Electrohydrodynamic Flow in a Circular Cylindrical Conduit

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Chinese Annals of Mathematics,Series B 2015年第2期36卷 307-322页

作者： Mohsen MOGHTADAEI Hassan SABERI NIK Saeid ABBASBANDY Department of Mathematics Imam Khomeini International University young Researchers and Elite Club Neyshabur Branch Islamic Azad University

This paper presents a combination of the hybrid spectral collocation technique and the spectral homotopy analysis method(SHAM for short) for solving the nonlinear boundary value problem(BVP for short) for the electrohydrodynamic flow of a fluid in an ion drag configuration in a circular cylindrical conduit. The accuracy of the present solution is found to be in excellent agreement with the previously published solution. The authors use an averaged residual error to find the optimal convergence-control parameters. Comparisons are made between SHAM generated results, results from literature and Matlab ode45 generated results, and good agreement is observed.

关键词： Spectral collocation Spectral homotopy analysis method Optimal convergence-control parameters Electrohydrodynamic flow