In this work, Au–Ag nanoparticles (Au–Ag-bi-MNPs) have been prepared on amine functionalized Si-M... more In this work, Au–Ag nanoparticles (Au–Ag-bi-MNPs) have been prepared on amine functionalized Si-MCM-41 (NH2–Si-MCM-41) particles through a reduction of AgNO3 and HAuCl4 by NaBH4 at ambient conditions. Au–Ag-bi-MNPs loaded on the NH2–Si-MCM-41, provide a good biocompatible surface for immobilization of the enzyme alkaline protease. This immobilization, presumably due to bonding between core shell nanoparticles and OH in serine 183 in
This paper addresses the problem of optimal operation scheduling of an individual pumped-storage ... more This paper addresses the problem of optimal operation scheduling of an individual pumped-storage plant to participate in the energy and regulation markets simultaneously. The goal is achieving of the maximum expected profit when the plant participates in a day-ahead (DA) energy and regulation markets while all of the technical constraints are satisfied. This optimal operation scheduling problem is formulated and solved as a mixed integer programming (MIP) problem. Numerical results for a case study are discussed.
Viscosities of ionic liquids were correlated with two linear relations. The first one presents th... more Viscosities of ionic liquids were correlated with two linear relations. The first one presents the temperature dependence of imidazolium-, pyridinium-, pyrrolidinium-, quaternary ammonium-, and nicotinium-based ionic liquids with high accuracy. The second one is a linear relation between logarithm of surface tension and fluidity involving the characteristic exponent ϕ, and fits the ionic liquids uniquely with ϕ=0.30. Our previously measured
The University of Tehran (UT) is the oldest and one of the largest academic centers in Iran. It p... more The University of Tehran (UT) is the oldest and one of the largest academic centers in Iran. It plays an important role in education and research in the country. Due to the importance of Tehran University we decided to study its academic scientific output in the Web of Science during 1989-2009 using a scientometric approach. The purpose of this study was to identify the rank of UT among Iranian universities. The key authors and influential journals, types of documents, the rate of yearly output and the annual growth rate were also identified. We also specified the countries with whose scholars UT academic members collaborated during the studied period. In addition, we drew and analyzed two historiographical maps of UT, based on Local Citation Score (LCS) and Global Citation Score (GCS).
Physica E-low-dimensional Systems & Nanostructures, 2011
This paper presents the free vibration analysis of functionally graded carbon nanotube-reinforced... more This paper presents the free vibration analysis of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) plates resting on elastic foundation (Winkler and Pasternak) using second order shear deformation plate theory (SSDT). The governing equations and the related boundary conditions are derived using the principal of the minimum total potential energy. The Navier-type solution is used for simply-supported boundary conditions, and exact formulas are proposed for the fundamental frequencies. The material properties of functionally graded carbon nanotube-reinforced composites are assumed to be graded through the thickness direction according to linear distributions of the volume fraction of carbon nanotubes. In order to establish the accuracy of the present formulation and results, the natural frequencies are obtained, and compared with the published results available in the literature. Good agreement is observed. Detailed parametric studies have been carried out to reveal the influences of the Winkler and Pasternak coefficients, length to thickness ratio and length to width ratio on the vibration responses of the plates.
In this work, Au–Ag nanoparticles (Au–Ag-bi-MNPs) have been prepared on amine functionalized Si-M... more In this work, Au–Ag nanoparticles (Au–Ag-bi-MNPs) have been prepared on amine functionalized Si-MCM-41 (NH2–Si-MCM-41) particles through a reduction of AgNO3 and HAuCl4 by NaBH4 at ambient conditions. Au–Ag-bi-MNPs loaded on the NH2–Si-MCM-41, provide a good biocompatible surface for immobilization of the enzyme alkaline protease. This immobilization, presumably due to bonding between core shell nanoparticles and OH in serine 183 in
This paper addresses the problem of optimal operation scheduling of an individual pumped-storage ... more This paper addresses the problem of optimal operation scheduling of an individual pumped-storage plant to participate in the energy and regulation markets simultaneously. The goal is achieving of the maximum expected profit when the plant participates in a day-ahead (DA) energy and regulation markets while all of the technical constraints are satisfied. This optimal operation scheduling problem is formulated and solved as a mixed integer programming (MIP) problem. Numerical results for a case study are discussed.
Viscosities of ionic liquids were correlated with two linear relations. The first one presents th... more Viscosities of ionic liquids were correlated with two linear relations. The first one presents the temperature dependence of imidazolium-, pyridinium-, pyrrolidinium-, quaternary ammonium-, and nicotinium-based ionic liquids with high accuracy. The second one is a linear relation between logarithm of surface tension and fluidity involving the characteristic exponent ϕ, and fits the ionic liquids uniquely with ϕ=0.30. Our previously measured
The University of Tehran (UT) is the oldest and one of the largest academic centers in Iran. It p... more The University of Tehran (UT) is the oldest and one of the largest academic centers in Iran. It plays an important role in education and research in the country. Due to the importance of Tehran University we decided to study its academic scientific output in the Web of Science during 1989-2009 using a scientometric approach. The purpose of this study was to identify the rank of UT among Iranian universities. The key authors and influential journals, types of documents, the rate of yearly output and the annual growth rate were also identified. We also specified the countries with whose scholars UT academic members collaborated during the studied period. In addition, we drew and analyzed two historiographical maps of UT, based on Local Citation Score (LCS) and Global Citation Score (GCS).
Physica E-low-dimensional Systems & Nanostructures, 2011
This paper presents the free vibration analysis of functionally graded carbon nanotube-reinforced... more This paper presents the free vibration analysis of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) plates resting on elastic foundation (Winkler and Pasternak) using second order shear deformation plate theory (SSDT). The governing equations and the related boundary conditions are derived using the principal of the minimum total potential energy. The Navier-type solution is used for simply-supported boundary conditions, and exact formulas are proposed for the fundamental frequencies. The material properties of functionally graded carbon nanotube-reinforced composites are assumed to be graded through the thickness direction according to linear distributions of the volume fraction of carbon nanotubes. In order to establish the accuracy of the present formulation and results, the natural frequencies are obtained, and compared with the published results available in the literature. Good agreement is observed. Detailed parametric studies have been carried out to reveal the influences of the Winkler and Pasternak coefficients, length to thickness ratio and length to width ratio on the vibration responses of the plates.
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