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Applications of differential algebra for computing Lie algebras of infinitesimal CR-automorphisms

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Science China Mathematics 2014年第9期57卷 1811-1834页

作者： sabzevari masoud HASHEMI Amir M.-ALIZADEH Benyamin MERKER Jel Department of Pure Mathematics University of Shahrekord School of Mathematics Institute for Research in Fundamental Sciences (IPM) Department of Mathematical Sciences Isfahan University of Technology School of Mathematics and Computer Sciences Damghan University Dpartment de Mathmatiques d'Orsay Batiment 425Facult des SciencesUniversit Paris XI-Orsay

We perform detailed computations of Lie algebras of infinitesimal CR-automorphisms associated to three specific model real analytic CR-generic submanifolds in C9by employing differential algebra computer tools—mostly within the Maple package DifferentialAlgebra—in order to automate the handling of the arising highly complex linear systems of PDE’*** treating these new examples which prolong previous works of Beloshapka,of Shananina and of Mamai,we provide general formulas for the explicitation of the concerned PDE systems that are valid in arbitrary codimension k 1 and in any CR dimension n ***,we show how Ritt’s reduction algorithm can be adapted to the case under interest,where the concerned PDE systems admit so-called complex conjugations.

关键词： differential algebra differential polynomial ring Ritt reduction algorithm Rosenfeld-Grbner algorithm CR-manifolds Lie algebras of infinitesimal CR-automorphisms

Microwave-assisted fast and efficient synthesis of some crown ethers

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Chinese Chemical Letters 2009年第8期20卷 924-926页

作者： Ahmad Ziafati Hossein Eshghi Omolbanin sabzevari Department of Chemistry Ferdowsi University of MashhadP.O.Box 91775-1436 MashhadIran

13-Crown-4, 16-crown-5, dibenzo-12-crown-4 and dibenzo-14-crown-4 were synthesized by a one-pot microwave-assisted procedure in good yields. Irradiation of diols and dichlorides in the presence of sodium hydroxide in DMSO gave title crown ethers presumably within a template effect. ？2009 Hossein Eshghi. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All fights reserved.

关键词： Crown ether Microwave irradiation Template effect

Investigating the Role of Bushehr Nuclear Power Plants(BNPPs)in Line with Achieving the Perspective of Sustainable Energy Development in Iran

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Journal of Thermal Science 2022年第5期31卷 1392-1406页

作者： NASOURI masoud DELGARM Navid Department of Environment Aras International CampusUniversity of TehranTehran***Iran Department of Mechanical Engineering Malek-Ashtar University of TechnologyIsfahan83145/115Iran

In line with achieving the outlook of Sustainable Energy Development(SED),Iran intends to increase the share of clean power to at least 8%of the country’s capacity by the end of *** research aims to investigate the role and share of Bushehr Nuclear Power Plants(BNPP-1,2,3)in achieving the SED perspective of Iran,which has never been examined so *** this connection,the comparative analyses of various power plants(PPs)of Iran including nuclear,fossil fuel,biomass,wind,solar thermal,photovoltaic,geothermal,and hydro PPs are carried out and *** main indicators of SED such as Levelized Cost of Electricity(LCOE)metric,grid-level system cost,investment cost,external cost,average CO_(2) equivalent emission,ecosystem impact,required land area,required water,preservation of natural resources,human health,created jobs,international cooperation,social acceptance and Corporate Social Responsibility(CSR),and energy-water hub are thoroughly *** statistical data used in the present study are extracted based on the authors’experiences gained during the construction,operation and maintenance(O&M)of BNPP-1,the energy-environment balance sheets of Iran,as well as the design documents of ***,the gathered data are evaluated using MatLab programing language and analyzed in terms of comparative *** evaluations of BNPP-1 performance within the framework of SED indicate that BNPP-1 has little effect on ecosystems and is among the lowest greenhouse gases emitters compared to other Iran’s PPs so that it annually prevent the release of 0.7 million tonnes of carbon,SO_(x),and NO_(x) compared to a gas-fired ***,the cost analysis shows that the external cost of BNPP-1 is nearly zero and the grid-level cost is approximately 3 USD/(MW·h)which is much lower than that for renewable *** per the LCOE metric and the cost of fuel supply,BNPP-1 is cost-competitive with other Iran’s *** nuclear fuel cost of BNPP-1 is nearly 49 million USD per

关键词： BNPP Sustainable Energy Development(SED) economic social environment

Efcient Iterative Solutions to General Coupled Matrix Equations

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International Journal of Automation and computing 2013年第5期10卷 481-486页

作者： masoud Hajarian Department of Mathematics Faculty of Mathematical Sciences Shahid Beheshti University

Linear matrix equations are encountered in many systems and control *** this paper,we consider the general coupled matrix equations（including the generalized coupled Sylvester matrix equations as a special case）l t=1EstYtFst = Gs,s = 1,2,···,l over the generalized reflexive matrix group（Y1,Y2,···,Yl）.We derive an efcient gradient-iterative（GI） algorithm for fnding the generalized reflexive solution group of the general coupled matrix *** analysis indicates that the algorithm always converges to the generalized reflexive solution group for any initial generalized reflexive matrix group（Y1（1）,Y2（1）,···,Yl（1））.Finally,numerical results are presented to test and illustrate the performance of the algorithm in terms of convergence,accuracy as well as the efciency.

关键词： General coupled matrix equations Lyapunov matrix equation Sylvester matrix equation generalized reflexive solutiongroup iterative algorithm

Three Dimensional Numerical Analysis of Flow within an Isolated Rotor with Stepped Blades

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Journal of Thermal Science 2012年第5期21卷 420-427页

作者： Shervin Sammak masoud Boroomand Aerospace Engineering Department Amirkabir University of TechnologyTehran Iran

Every compressor works in a limited operational range. Surge as one of the sources of this limitation has been studied for many years. In this research, an isolated blade row of compressor rotor is numerically modeled and solved. In order to improve operational limit and postpone the surge occurrence, a stepped blade of RAF6E with higher stall angle of attack is used to investigate the near stall flow behavior. In this study, several location of step on blades are tried and the results are compared with the case with no step on blades. It is shown that, as the step moves toward the leading edge of blades, the effect of delay on surge is reduced and even efficiency is also decreased significantly. By moving the step towards the trailing edge, surge is delayed due to the reattachment of flow after the step. Efficiency is also decreased but not in the order of the previous case.

关键词： compressor performance efficiency stable operational margin stepped airfoil surge improvement

Efficiency-based Pareto Optimization of Building Energy Consumption and Thermal Comfort:A Case Study of a Residential Building in Bushehr,Iran

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Journal of Thermal Science 2024年第3期33卷 1037-1054页

作者： masoud NASOURI Navid DELGARM Department of Environment University of TehranAras International CampusP.O.Box ***TehranIran Department of Mechanical and Aerospace Engineering Malek-Ashtar University of TechnologyP.O.Box 83145/115IsfahanIran

In Iran,the intensity of energy consumption in the building sector is almost 3 times the world average,and due to the consumption of fossil fuels as the main source of energy in this sector,as well as the lack of optimal design of buildings,it has led to excessive release of toxic gases into the *** research develops an efficient approach for the simulation-oriented Pareto optimization(SOPO)of building energy efficiency to assist engineers in optimal building design in early design *** this end,EnergyPlus,as one of the most powerful and well-known whole-building simulation programs,is combined with the Multi-objective Ant Colony Optimization(MOACO)algorithm through the JAVA programming *** a result,the capabilities of JAVA programming are added to EnergyPlus without the use of other plugins and third *** evaluate the effectiveness of the developed method,it was performed on a residential building located in the hot and semi-arid region of *** obtain the optimum configuration of the building under investigation,the building rotation,window-to-wall ratio,tilt angle of shading device,depth of shading device,color of the external walls,area of solar collector,tilt angle of solar collector,rotation of solar collector,cooling and heating setpoints of heating,ventilation,and air conditioning(HVAC)system are chosen as decision ***,the building energy consumption(BEC),solar collector efficiency(SCE),and predicted percentage of dissatisfied(PPD)index as a measure of the occupants'thermal comfort level are chosen as the objective *** single-objective optimization(SO)and Pareto optimization(PO)are *** obtained results are compared to the initial values of the basic *** optimization results depict that the PO provides optimal solutions more reliable than those obtained by the SOs,owing to the lower value of the deviation ***,the optimal solutions extracted through the PO are depicted in the

关键词： building energy consumption thermal comfort collector efficiency simulation-oriented pareto optimization

Microwave activated synthesis of 2-aryl-quinazolin-4(3H)ones

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Chinese Chemical Letters 2007年第12期18卷 1466-1468页

作者： M.Bakavoli O.sabzevari M.Rahimizadeh Department of Chemistry School of SciencesFerdowsi UniversityMashhad 91775-1436Iran

A highly efficient synthesis of 2-aryl-quinazolin-4（3H）ones was performed by one-pot oxidative heterocyclization of 2- aminobenzamide with aldehydes in the presence of potassium permanganate in dimethylacetamide und... 详细信息

关键词： Quinazolinones Microwave 2-Aminobenzamide Aldehydes

H-Y-zeolites induced heterocyclization:Highly efficient synthesis of substituted-quinazolin-4(3H) ones under microwave irradiation

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Chinese Chemical Letters 2007年第5期18卷 533-535页

作者： M. Bakavoli O. sabzevari M. Rahimizadeh Department of Chemistry School of Sciences Ferdowsi University Mashhad 91775-1436 Iran

A highly efficient synthesis of 2-amino-N-substituted-benzamides was performed by the condensation ofisatoic anhydride with several amines in solvent-free conditions under microwave irradiation. H-Y-zeolites induced heterocyclization of these products with ortho-esters under similar conditions afforded the relevant substituted-quinazolin-4（3H）ones in high yields.

关键词： Isatoic anhydride 2-Aminobenzamide H-Y-zeolite Quinazolinones

Wettability alteration and retention of mixed polymer-grafted silica nanoparticles onto oil-wet porous medium

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Petroleum Science 2021年第3期18卷 962-982页

作者： Hamid Daneshmand masoud Rezaeinasab masoud Asgary Meysam Karimi Department of Physics University of TehranTehranIran Department of Chemistry Faculty of ScienceYazd UniversityYazdIran Department of Materials Engineering Tarbiat Modares UniversityTehranIran Department of Material Science Shahreza BranchIslamic Azad UniversityIsfahanIran

Enhanced oil recovery(EOR)processes are applied to recover trapped or residual oil in the reservoir rocks after primary and secondary recovery *** the wettability of the rock from oil-wet to water-wet is named wettability *** is an important factor for *** to their unique properties,nanoparticles have gained great attention for improving oil *** the promising results,the main challenges of applying nanoparticles are related to the colloidal stability of the nanofuids in the harsh conditions of the *** recent years,polymer-grafted nanoparticles have been considered as novel promising materials for *** obtained results showed that adding a hydrophobic agent trimethoxy(propyl)silane on the surface of modifed silica nanoparticles with polyethylene glycol methyl ether has an efective role in improving retention and wettability alteration,especially in the oil-wet substrate due to hydrophobic *** modifed silica nanoparticle by mixed polyethylene glycol methyl ether(Mn~5000)and trimethoxy(propyl)silane showed a proper performance at a concentration of 1000 ppm and a salinity range of 2000-40,000 *** obtained fndings can help for a better understanding of the silica nanofuid modifcation with both hydrophilic and hydrophobic agents for the EOR application of near-wellbore.

关键词： Wettability alteration Retention Silica nanoparticle Surface modifcation Enhanced oil recovery