نتایج جستجو برای: thermodynamic

تعداد نتایج: 41341  

2012
Y. Gandica E. Medina I. Bonalde

We propose a thermodynamic version of the Axelrod model of social influence. In one-dimensional (1D) lattices, the thermodynamic model becomes a coupled Potts model with a bonding interaction that increases with the site matching traits. We analytically calculate thermodynamic and critical properties for a 1D system and show that an order-disorder phase transition only occurs at T = 0 independe...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2009
Edward H Feng Gavin E Crooks

Thermodynamic length is a path function that generalizes the notion of length to the surface of thermodynamic states. Here, we show how to measure thermodynamic length in far-from-equilibrium experiments using the work fluctuation relations. For these microscopic systems, it proves necessary to define the thermodynamic length in terms of the Fisher information. Consequently, the thermodynamic l...

Journal: :journal of physical and theoretical chemistry 0
gholamali haghdoost science and research campus, islamic azad university, iran. hosain aghaie department of chemistry, tehran science and research branch, islamic azad university, tehran, iran majid monajjemi department of chemistry, science and research branch, islamic azad university, tehran, iran

abstractin this work, the micro powder was the product of cedar leaf (mpcl) is used as a low-cost adsorbent for the removal of pb2+ ions from aqueous solutions. bath experiments were used to determine the best adsorption conditions the adsorption percentage of pb2+ ions mpcl samples at different initial ph, contact time (tc), adsorbent dosage and temperature (t) were investigated. effective rem...

Journal: :iranian journal of oil & gas science and technology 2014
seyyed milad salehi mahmood reza rahimi

it seems using the maxwell-stefan (m-s) diffusion model in combination with the vacancy solutiontheory (vst) and the single-component adsorption data provides a superior, qualitative, andquantitative prediction of diffusion in zeolites. in the m-s formulation, thermodynamic factor (г) isan essential parameter which must be estimated by an adsorption isotherm. researchers usually utilizethe simp...

2018
Elad Noor

Constraint-based stoichiometric models are ubiquitous in metabolic research, with Flux Balance Analysis (FBA) being the most widely used method to describe metabolic phenotypes of cells growing in steady-state. Of the many variants of constrainbased modelling methods published throughout the years, only few have focused on thermodynamic issues, in particular the elimination of non-physical and ...

Journal: :analytical and bioanalytical chemistry research 0
salma jadali faculty of chemistry, semnan university, semnan, iran. s. maryam sajjadi faculty of chemistry, semnan university, semnan, iran hassan zavvar mousavi faculty of chemistry, semnan university, semnan, iran maryam rajabi faculty of chemistry, semnan university, semnan, iran

in this study, the ashes of poplar tree leaves are applied as an efficient, accessible and inexpensive biosorbent for the removal of heavy metals pb2+ and cu+2 in aqueous solutions. in the adsorption processes, the success of the ions removal highly depends on the level of several experimental factors such as ph, contact time, adsorbent dosage and temperature. therefore, a genuine statistical e...

Journal: :energy equipment and systems 0
mohammad mahdi naserian department of mechanical engineering, university of sistan and baluchestan, zahedan, iran said farahat department of mechanical engineering, university of sistan and baluchestan, zahedan, iran faramarz sarhaddi department of mechanical engineering, university of sistan and baluchestan, zahedan, iran

in this study, the performance of an irreversible regenerative brayton cycle is sought through power maximizations using finite-time thermodynamic concept in finite-size components. optimizations are performed using a genetic algorithm. in order to take into account the finite-time and finite-size concepts in the current problem, a dimensionless mass-flow rate parameter is used to deploy time v...

Journal: :journal of chemical and petroleum engineering 2013
mojtaba mokhtari majid mohadesi gholamreza moradi

wax precipitate is one of the most serious issues the oil industry is currently facing, since it can cause some troubles such as increasing of the pressure losses in pipe which subsequently increases the required power for pumpage. to remove this problem, prediction of wax disappearance temperature (wdt) seems necessary. in this study, the pressure influence on the wax disappearance temperature...

Journal: :journal of physical & theoretical chemistry 2015
m. aghaie s. moradian

in this study, the ion association phenomenon in the saturated solution of kcl in the mixed solvent(methanol+water) was studied. the solubility of this compound in the mixed solvent (methanol+water by value percent of methanol = 60%), and in the presence of various molarities of nano3 wasdetermined by the solvent evaporation method at 25.0°c. the results enable us to estimate the valueof thermo...

An analytical equation of state is applied to calculate the thermodynamic properties for argon. Theequation of state is that of Song and Mason. It is based on a statistical-mechanical perturbation theory ofhard convex bodies and can be written as fifth-order polynomial in the density. There exist three temperaturedependentparameters: the second virial coefficient, an effective molecular volume,...

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