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Cyrus Parsi Aryana 《Complex Analysis and Operator Theory》2013,7(5):1513-1524
A direct calculation of the vector of Riemann constants corresponding to the marked double of a multiply connected planar region is given. The existence of eigenvalues of self-adjoint Toeplitz operators acting on Hardy spaces associated with non-negative representing measures on 1-holed planar regions is established in the case where there exists one bounded component in the complement of the essential range of the symbol $\phi $ of the operator. The analysis is done by using the zeros of translations of theta functions restricted to $\mathbb R $ in $\mathbb C $ . 相似文献
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Zinc chloride is an efficient and safe catalyst in the[3 + 2]cycloaddition reaction of organic nitriles with sodium azide in solventless condition.The corresponding S-substituted 1H tetrazoles were obtained under mild conditions.This method can overcome disadvantages such as:the use of toxic metals and expensive reagents,drastic reaction conditions,water sensitivity and the presence of dangerous hydrazoic acid. 相似文献
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Aryana Nurhani Ramadhaningtyas Dillani Putri Styarini Dyah Aristiawan Yosi 《Accreditation and quality assurance》2019,24(6):427-435
Accreditation and Quality Assurance - Research Center for Chemistry-Indonesian Institute of Sciences (RCChem-LIPI) has successfully organized proficiency testing (PT) for the determination of... 相似文献
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Esmail Vessally Ladan Edjlali Maryam Saber Soma Aryana 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2012,86(5):791-797
Geometrical structures, Hammett constants, 1H and 13C chemical shift values, molecular electrostatic potential maps, and several thermodynamic parameters of α-acyloxy carboxamide
derivatives (4a–o) were calculated using HF and DFT/B3LYP methods with 6-31G(d) basis set. The optimized structures were compared with analogous compound. The 1H and 13C NMR shielding tensors were computed with the Gauge-Independent Atomic Orbital (GIAO) method. Comparison of the experimental
1H and 13C NMR chemical shifts of 4a–o molecules with the theoretical data indicates good agreement. 相似文献
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In this paper we develop a more general formulation for transient multiphase flow in porous media based on physics observed in core-scale and micromodel experiments. We account for non-equilibrium effects by considering redistribution time and treat saturation by evolving locally moving time-averages of the saturation. Several families of models arise from approximations to the general formulation with various degrees of accuracy. The classical Buckley-Leverett and Barenblatt expressions are special cases of these families. We explore the behaviors of a number of special cases arising from the proposed general formulation using established and novel numerical schemes that provide nonlinear physics-based preconditioning. The agreement observed between numerical and experimental results demonstrates the consistency of the proposed abstraction. 相似文献
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Krismastuti Fransiska Sri Herwahyu Aryana Nurhani Hindayani Ayu Hamim Nuryatini 《Accreditation and quality assurance》2019,24(1):57-63
Accreditation and Quality Assurance - Chemical Metrology Laboratory, LIPI, organizes an annual proficiency testing (PT) scheme with pH being one of the parameters investigated. This study presents... 相似文献
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Cyrus P. Aryana Kevin F. Clancey 《Proceedings of the American Mathematical Society》2004,132(10):3007-3018
A study is made of the eigenvalues of self-adjoint Toeplitz operators on multiply connected planar regions having holes. The presence of eigenvalues is detected through an analysis of the zeros of translations of theta functions restricted to in .
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