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Frontiers of Chemical Science and Engineering 2020年第2期14卷 233-247页

作者： Kasra Pirzadeh Ali Asghar Ghoreyshi Mostafa Rahimnejad Maedeh mohammadi Chemical Engineering Department Babol Noshirvani University of TechnologyBabolIran

Cu(BTC),a common type of metal organic framework(MOF),was synthesized through electrochemical route for CO capture and its separation from *** method was employed for optimization of key parameters affecting the synthesis of Cu(BTC).The results indicated that the optimum synthesis conditions with the highest CO selectivity can be obtained using 1 g of ligand,applied voltage of 25 V,synthesis time of 2 h,and electrode length of 3 *** single gas sorption capacity of the synthetized microstructure Cu(BTC)for CO(at 298 K and 1 bar)was a considerable value of 4.40 mmol·*** isosteric heat of adsorption of both gases was calculated by inserting temperature-dependent form of Langmuir isotherm model in the Clausius-Clapeyron *** adsorption of CO/N binary mixture with a concentration ratio of 15/85 vol-%was also studied experimentally and the result was in a good agreement with the predicted value of IAST ***,Cu(BTC)showed no considerable loss in CO adsorption after six sequential *** addition,artificial neural networks(ANNs)were also applied to predict the separation behavior of CO/N mixture by MOFs and the results revealed that ANNs could serve as an appropriate tool to predict the adsorptive selectivity of the binary gas mixture in the absence of experimental data.

关键词： Cu3(BTC)2 electrochemical synthesis CO2 adsorption Taguchi optimization ANN modeling

Parametric study and effect of calcination and carbonation conditions on the CO_2 capture performance of lithium orthosilicate sorbent

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Chinese Journal of Chemical Engineering 2018年第3期26卷 631-641页

作者： Nurul Azrin Zubbri Abdul Rahman Mohamed Maedeh mohammadi Low Carbon Economy (LCE) Research Group School of Chemical Engineering Engineering Campus Universiti Sains Malaysia Faculty of Chemical Engineering Babol Noushirvani University of Technology

The world is currently facing the challenges of global warming and climate change. Numerous efforts have been taken to mitigate CO2 emission, among which is the use of solid sorbents for CO2 capture. In this work, Li4SiO4 was synthesised via a sol-gel method using lithium nitrate （LiNO3） and tetraethylorthosilicate （SiC8H20O4） as precursors. A parametric study of Li：Si molar ratio （1-5）, calcination temperature （600-800℃） and calcination time （1-8 h） were conducted during sorbent synthesis. Calcination temperature （700-800℃） and carbonation temperature （500-700℃） during CO2 sorption activity were also varied to confirm the optimum operating temperature. Sorbent with the highest CO2 sorption capacity was finally introduced to several cyclic tests to study the durability of the sorbent through 10 cycles of CO2 sorption-desorption test. The results showed that the calcination temperature of 800℃ and carbonation temperature of 700℃ were the best operating temperatures, with CO2 sorption capacity of 7.95 mmol CO2·（g sorbent）^-1 （93% of the theoretical yield）. Throughout the ten cyclic processes, CO2 sorption capacity of the sorbent had dropped approximately 16.2% from the first to the tenth cycle, which was a reasonable decline. Thus, it was concluded that Li4SiO4 is a potential CO2 solid sorbent for high temperature CO2 capture activity.

关键词： CO2 capture Adsorption Carbon dioxide Lithium orthosilicate Sol-gel Sorption-desorption

Electrocatalytic behaviour of Ni and NiCu alloy modified glassy carbon electrode in electro-oxidation of contraflam

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Journal of Central South University 2017年第8期24卷 1703-1712页

作者： Naeemy Ali mohammadi Ali Ehsani Ali Aghassi Ali Department of Drug and Food Control and Pharmaceutical Qtlality Assurance Research:Centre Faculty of PharmacyTehran University of Medical SciencesP.O.Box 14155-6451TehranIran Nanotechnology Research Centre Faculty of PharmacyTehran University of Medical SciencesP.O.Box 14155-6451TehranIran Department of Chemistry Faculty of ScienceUniversity of QomP.O.Box 37185-359QomIran

The electrocatalytic oxidation of contraflam was investigated in alkaline solution on nickel and nickel–copper alloy modified glassy carbon electrodes(GC/Ni and GC/NiCu). We prepared these electrodes by galvanostatic deposition and the surface morphologies and compositions of electrodes were determined by energy-dispersive X-ray(EDX) and scanning electron microscopy(SEM). Cyclic voltammetry and chronoamperometric methods were employed to characterize the oxidation process and its kinetics. Voltammetric studies exhibit one pair of well-defined redox peaks, which is ascribed to the redox process of the nickel and followed by the greatly enhanced current response of the anodic peak in the presence of contraflam and a decrease in the corresponding cathodic current peak. This indicates that the immobilized redox mediator on the electrode surface was oxidized contraflam via an electrocatalytic mechanism. The catalytic currents increased linearly with the concentration of contraflam in the range of 0.25– 1.5 mmol/L. The anodic peak currents were linearly proportional to the square root of scan rate. This behaviour is the characteristic of a diffusion-controlled process. The determination of contraflam in capsules is applied satisfactorily by modified electrode.

关键词： galvanostatic deposition nickel nickel-copper alloy contraflam modified electrodes cyclic voltammetry oxidation

Real-time Energy Management of Grid-connected Microgrid with Flexible and Delay-tolerant Loads

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1196-1207页

作者： Sevda Zeinal-Kheiri Amin Mohammadpour Shotorbani Behnam mohammadi-Ivatloo IEEE the Faculty of Electrical and Computer Engineering University of TabrizTabrizIran the School of Engineering University of British Columbia OkanaganKelownaCanada the Institute of Research and Development Duy Tan UniversityDa NangVietnam

For optimal operation of microgrids,energy management is indispensable to reduce the operation cost and the emission of conventional *** goals can be impeded by several factors including uncertainties of market price,renewable generation,and ***-time energy management system(EMS)can effectively address uncertainties due to the online information of market price,renewable generation,and ***,some issues arise in real-time EMS as batterylimited energy *** this paper,Lyapunov optimization is used to minimize the operation cost of the microgrid and the emission of conventional ***,the problem is multiobjective and a Pareto front is derived to compromise between the operation cost and the *** a modified IEEE 33-bus distribution system,general algebraic modeling system(GAMS)is utilized for implementing the proposed EMS on two case studies to verify its applicability.

关键词： Battery energy management system(EMS) flexible and delay-tolerant load Lyapunov optimization microgrid optimal power flow renewable generation

Study of the dinuclear system for^(296)119 superheavy compound nucleus in fusion reactions

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Chinese Physics C 2021年第4期45卷 325-334页

作者： J.mohammadi O.N.Ghodsi Department of Physics Faculty of ScienceUniversity of MazandaranP.O.Box 47415-416BabolsarIran

This investigation aims to find an appropriate dinuclear system for the formation of^(296)119 superheavy compound *** studying the driving potential and measuring the capture cross section of the reactions,the evolution of the dinuclear system can be *** this study,we obtained capture,fusion,and evaporation residue cross sections and survival probability at energies near the Coulomb barrier for four reactions,namely ^(45)Sc+^(251)Cf,^(42)Ca+^(254)Es,^(39)K+^(297)Fm,and ^(38)Ar+^(258)*** caleulations show that the reaction 38Ar+258 Md is a suitable choice for the formation of an element with 119 protons among the studied reactions from a the-oretical viewpoint.

关键词： dinuclear system cross section fusion reaction superheavy elements

Micromechanics of breakage in sharp-edge particles using combined DEM and FEM

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Particuology 2008年第5期6卷 347-361页

作者： Ahad Bagherzadeh-Khalkhali Ali Asghar Mirghasemi Soheil mohammadi School of Civil Engineering University College of EngineeringUniversity of Tehran

By combining DEM （Discrete Element Method） and FEM （Finite Element Method）, a model is established to simulate the breakage of twodimensional sharp-edge particles, in which the simulated particles are assumed to have no cracks. Particles can, however, crush during different stages of the numerical analysis, if stress-based breakage criteria are fulfilled inside the particles. With this model, it is possible to study the influence of particle breakage on macro- and micro-mechanical behavior of simulated angular materials. Two series of tests, with and without breakable particles, are simulated under different confining pressures based on conditions of biaxial tests. The results, presented in terms of micromechanical behavior for different confining pressures, are compared with macroparameters. The influence of particle breakage on microstructure of sharp-edge materials is discussed and the related confining pressure effects are investigated. Breakage of particles in rockfill materials are shown to reduce the anisotropy coefficients of the samples and therefore their strength and dilation behaviors.

关键词： DEM FEM Particle breakage Rockfill Micromechanics Anisotropy Confining pressure

Formation-Containment Control Using Dynamic Event-Triggering Mechanism for Multi-Agent Systems

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IEEE/CAA Journal of Automatica Sinica 2020年第5期7卷 1235-1248页

作者： Amir Amini Amir Asif Arash mohammadi Electrical and Computer Engineering Concordia UniversityMontrealQuebec H3G 2W1Canada Concordia Institute for Information System Engineering Concordia UniversityMontrealQuebec H3G 1M8Canada IEEE

The paper proposes a novel approach for formationcontainment control based on a dynamic event-triggering mechanism for multi-agent *** leader-leader and follower-follower communications are reduced by utilizing the distributed dynamic event-triggered *** consider two separate sets of design parameters:one set comprising control and dynamic event-triggering parameters for the leaders and a second set similar to the first one with different values for the *** proposed algorithm includes two novel stages of codesign optimization to simultaneously compute the two sets of *** design optimizations are convex and use the weighted sum approach to enable a structured trade-off between the formation-containment convergence rate and associated *** based on non-holonomic mobile robot multi-agent systems quantify the effectiveness of the proposed approach.

关键词： Co-design convex optimization dynamic event-triggered schemes formation-containment control multi-agent systems

Methodologies of preparing erosion features map by using RS and GIS

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International Journal of Sediment Research 2008年第2期23卷 130-137页

作者： mohammadi Torkashvand Ali Nikkami Davood Islamic Azad University-Rasht branch RashtIranAssis.Prof Soil Conservation and Watershed Management Research Institute TehranIranAssis.Prof

The erosion features map is one of the basic maps in erosion and sediment studies and watershed management *** methodologies of preparing erosion features map by using RS and GIS were compared in research which took place in the Jajrood sub-basin in north-east Tehran,*** the first phase,four working units’ maps were prepared by integration a) plant cover,geology and slope b) land use,geology and slope c) land use,rocks sensitivity to erosion and slope and d) land use,rocks sensitivity to erosion and land units’ *** addition to these four working units’ maps,three more maps were also evaluated in separating erosion features including e) land units f) sensitivity of rocks to erosion and g) image photomorphic *** efficiency of these seven working units’ maps was evaluated by 314 control *** this purpose,by using erosion features of control points regarding field views,surface,rill,gully and channel erosion maps were prepared and compared by crossing them with working units’ *** showed that method "d" was better than "a","b" and "c" in providing soil erosion features regarding economic and executive *** accuracy of methods "e" and "f" was 53.0 and 42.9% and their Root Mean Squared Error was more than method "g" and methods "a" to "d".The coefficient of variation was highest for methods "e" and "f" and the least for method "e" and the greatest precision was related to image interpretation.

关键词： Map of soil erosion Remote sensing GIS Jajrood river basin Iran

Application of K-means and PCA approaches to estimation of gold grade in Khooni district(central Iran)

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Acta Geochimica 2018年第1期37卷 102-112页

作者： Neda Mahvash mohammadi Ardeshir Hezarkhani Abbas Maghsoudi Department of Mining and Metallurgical Engineering Amirkabir University of Technology

Grade estimation is an important phase of mining projects, and one that is considered a challenge due in part to the structural complexities in mineral ore *** overcome this challenge, various techniques have been used in the past. This paper introduces an approach for estimating Au ore grades within a mining deposit using k-means and principal component analysis(PCA). The Khooni district was selected as the case study. This region is interesting geologically, in part because it is considered an important gold source. The study area is situated approximately 60km northeast of the Anarak city and 270km from Esfahan. Through PCA, we sought to understand the relationship between the elements of gold,arsenic, and antimony. Then, by clustering, the behavior of these elements was investigated. One of the most famous and efficient clustering methods is k-means, based on minimizing the total Euclidean distance from each class center. Using the combined results and characteristics of the cluster centers, the gold grade was determined with a correlation coefficient of 91%. An estimation equation for gold grade was derived based on four parameters: arsenic and antimony content, and length and width of the sampling points. The results demonstrate that this approach is faster and more accurate than existing methodologies for ore grade estimation.

关键词： K-means method Clustering Principal component analysis(PCA) Estimation Gold Khooni district

Morphology selective construction of β-cyclodextrin functionalized Fe3O4-Bi2WO6 nanocomposite with superior adsorptivity and visible-light-driven catalytic activity

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 561-578页

作者： Maher Darwish Ali mohammadi Navid Assi Samer Abuzerr Youssef Alahmad Pharmaceutical Quality Assurance Research Centre Faculty of PharmacyIntermational CampusTehran University of Medical SciencesTehranIran Department of Pharmacy Al-Safwa University CollegeKarbalalraq Nanotechnology Research Centre Faculty of PharmacyTehran University of Medical SciencesTehranIran Department of Environmental Health Engineering Faculty of Public HealthIntermational CampusTehran University of Medical SciencesTehranIran Department of Pharmaceutical Chemistry and Drug Control Faculty of PharmacyAlbaath UniversityHomsSyria

Controlled growth of Bi2WO6 nanorods with exposed[001]facets and the fabrication of an Fe2O4-Bi2WO6 magnetic composite by a microwave-assisted polyol process,were achieved in this *** adsorp-tivity and photocatalytic performance of the composite toward sunset yellow dye degradation were greatly enhanced by the β-cyclodextrin cavities on its surface,firmly anchored through a cetyltrimethylammonium bro-mide linkage.A series of examinations and characteriza-tions were carried out to determine the influence of various factors on the morphological modulation-photocatalytic behavior of the pure Bi2WO6 prior to final *** the pH of the precursor solution impacted the formation of 0D,2D,and 3D structures;however,the presence of hexamethylenetetramine surfactant induced the development of 1D nanorod structure.A reasonable crystal growth mechanism was proposed to elucidate the formation ***,the mechanism of the activity enhancement of β-cyclodextrin functionalized Fe2O4-Bi2WO6,compared to that of the non-functiona-lized samples,could be realized with the assistance of chemical trapping experiments on sunset yellow,and was confirmed on the colorless antibiotic(sulfamethoxazole).The high performance and durability of this composite can be attributed to the facet-dependent activity,large adsorp-tion capacity due to inclusion interactions,enhanced visible light absorption,and efficient charge separation.

关键词： β-cyclodextrin Bi2WO6 shape controlled nanorod sunset yellow