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Optimization of the reflux ratio of benzene-toluene stage distillation columns by the Cuckoo algorithm

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Petroleum Science 2014年第3期11卷 446-453页

作者： Bahador Abolpour ali mohebbi Department of Chemical Engineering Faculty of Engineering Shahid Bahonar University of Kerman

In this study, an enthalpy-concentration method was applied in order to model a steady state continuous benzene-toluene mixture distillation column. For a distillation tower such as the benzene- toluene splitter, there are relatively few degrees of freedom that can be manipulated in order to minimize the total annualized cost. The reflux ratio can influence the steady-state operating point and therefore influence the total annualized cost. The trade-offs between reflux ratios and total annualized cost were discussed. The Cuckoo optimization algorithm was applied to obtain a correlation for the optimum value of the reflux ratio as a power function of the economic parameters of energy price and capital cost. The results show that, at low energy price or high capital cost, the optimum reflux factor is high.

关键词： Benzene-toluene mixture distillation column Cuckoo optimization algorithm optimized reflux ratio total annualized cost

Assessment of pH-responsive nanoparticles performance on laboratory column flotation cell applying a real ore feed

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International Journal of Mining Science and Technology 2020年第2期30卷 197-205页

作者： Samiramis Nasirimoghaddam ali mohebbi Mohsen Karimi M.Reza Yarahmadi Department of Chemical Engineering Faculty of EngineeringShahid Bahonar University of KermanKermanIran Department of Chemistry and Chemical Engineering Chalmers University of TechnologySE-41296 GothenburgSweden Sarcheshmeh Copper Complex KermanIran

Nanoparticles(NPs)can promote the column flotation process in mining ***'effects on column flotation process(copper recovery,grade and flotation rate constant)are assessed in Sarcheshmeh Copper Complex,Iran,through response surface methodology(RSM)optimization *** c-Al2O3,a-Fe2O3,SiO2,and TiO2 nanoparticles are selected for these experiments.A flotation rate constant is chosen as a response to assess the effect of nanoparticles on flotation in its kinetic *** process p H and nanoparticle dosage are selected as the influential *** obtained from RSM indicated that the maximum percentage of Cu recovery and grade is obtained at p H of 12 and nanoparticle dosage of 6 kg/t,through a-Fe2O3 and c-Al2O3 nanoparticles,*** nanoparticles in particular c-Al2O3 and a-Fe2O3 increases the Cu recovery by 8–10%together with the grade by 3–6%in a significant *** is revealed that nanoparticles could effectively be applied in enhancing the flotation performance.

关键词： Column flotation Nanoparticles Cu recovery Response surface methodology

Effects of coating formulation on structural changes of turkey nugget during frying:MRI evaluation

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Journal of Future Foods 2024年第2期4卷 142-148页

作者： Arash Ghaitaranpour Mohebbat mohebbi Seyed Amir Oleyaei Department of Food Science and Technology Faculty of AgricultureUrmia UniversityUrmia ***Iran Advanced Frying Research Core Department of Food Science and TechnologyFerdowsi University of MashhadMashhad ***Iran Department of Food Science and Technology Ferdowsi University of MashhadMashhad ***Iran

Application of nondestructive techniques combined with image processing techniques has been increasing in investigating the internal structure of food *** resonance imaging(MRI)is one of these *** aim of this research is to investigate the effect of coating formulation on structural properties of turkey nugget samples(turkey nugget with typical batter,tragacanth-containing batter and tragacanth)by *** revealed that the changes caused by the batter formulation could also be examined using the tomographic *** results also indicated that the brightness of the MRI images of the nugget core and crust decreased during *** core of the nugget with the tragacanth-containing batter was brighter revealing its higher moisture ***,the nugget core was less reduced in this sample compared with the other *** research aimed to present a valuable knowledge about nugget frying pertaining to quality evaluation.

关键词： NuggetDeep fat frying Structural characterization Magnetic resonance imaging(MRI) Image processing

Hydroxycitric acid ameliorates inflammation and oxidative stress in mouse models of multiple sclerosis

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Neural Regeneration Research 2016年第10期11卷 1610-1616页

作者： Mahdi Goudarzvand Sanaz Afraei Somaye Yaslianifard Saleh Ghiasy Ghazal Sadri Mustafa Kalvandi Tina alinia ali mohebbi Reza Yazdani Shahin Khadem Azarian Abbas Mirshafiey Gholamreza Azizi Department of Physiology and Pharmacology Faculty of Medicine Alborz University of Medical Sciences Department of Immunology School of Public Health Tehran University of Medical Sciences Department of Microbiology and Immunology School of MedicineAlborz University of Medical Sciences Research Centre for Immunodeficiencies Pediatrics Centre of Excellence Children's Medical Centre Tehran University of Medical Sciences Growth and Development Research Centre Paediatrics Centre of Excellence Children's Medical Centre Tehran University of Medical Sciences Department of Immunology School of Medicine Isfahan University of Medical Sciences Department of Laboratory Medicine Imam Hassan Mojtaba Hospital Alborz University of Medical Sciences

Hydroxycitric acid （HCA） is derived primarily from the Garcinia plant and is widely used for its anti-in- flammatory effects. Multiple sclerosis can cause an inflammatory demyelination and axonal damage. In this study, to validate the hypothesis that HCA exhibits therapeutic effects on multiple sclerosis, we established female C57BL/6 mouse models of multiple sclerosis, i.e., experimental autoimmune encephalomyelitis, using Complete Freund＇s Adjuvant （CFA） emulsion containing myelin oligodendrocyte glycoprotein （35-55）. Treatment with HCA at 2 g/kg/d for 3 weeks obviously improved the symptoms of nerve injury of experimental autoimmune encephalomyelitis mice, decreased serum interleulin-6, tumor necrosis factor alpha, nitric oxide, and malondialdehyde levels, and increased superoxide dismutase and glutathione reduc- tase activities. These findings suggest that HCA exhibits neuroprotective effects on multiple sclerosis-caused nerve injury through ameliorating inflammation and oxidative stress.

关键词： nerve regeneration hydroxycitric acid multiple sclerosis inflammation oxidative stress experimentalautoimmune encephalomyelitis neural regeneration

一例最初表现为对侧疼痛性肩胛骨转移的肺癌和肺结核复杂病例(英文)

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The Chinese-German Journal of Clinical Oncology 2012年第5期11卷 294-296页

作者： Hassan-ali mohebbi Amin Saburi Mohammad-Hasan Bagheri Ehsan Saburi Surgury Department Faculty of MedicineBaqiyatallah University of Medical SciencesTehranIR.Iran Trauma Research Center Baqiyatallah University of Medical SciencesTehranIR.Iran Chemical Injuries Research Center Baqiyatallah University of Medical SciencesTehranIR.Iran Laboratory Medicine Department Shahid Beheshti University of Medical SciencesTehranIR.Iran

We report a 43-year-old man who presented with a right painful shoulder mass and bilateral lung masses in computed tomography(CT).Scapular mass was excised and pathology report demonstrated high-grade metastatic *** side lung biopsy and histopathological study characterized tuberculosis but biopsy of the left lung lesion identified adenocarcinoma of the *** final diagnosis was right scapular metastatic lesion from left lung *** symptoms are commonly encountered in lung malignancies due to paraneoplastic syndrome or hematogenous metastasis but scapular metastasis on the other side as the presentation of lung cancer is extremely rare.

关键词：肺结核肩胛骨肺癌痛苦计算机断层扫描恶性肿瘤组织学特点肺腺癌

Multiple failure function based fragility curves for structures equipped with TMD

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Earthquake Engineering and Engineering Vibration 2021年第2期20卷 471-482页

作者： Sina Bakhshinezhad Mohtasham mohebbi Faculty of Engineering University of Mohaghegh ArdabiliArdabilIran

This paper presents a procedure to develop fragility curves of structures equipped with TMD considering multiple failure *** failure criteria considered are maximum inter-story drift ratio as a safety criterion,maximum absolute acceleration as a convenience criterion and TMD stroke *** relationship between intensity measure and responses of the structure was assumed to follow the power-law model,and a regression analysis was used to estimate its properties.A nonlinear eight-story shear building subjected to near-fault earthquakes was used for the numerical *** curves using multiple and single failure functions for an uncontrolled structure and a structure equipped with optimal TMDs were *** analysis showed that using multiple failure functions led to increasing the fragility when compared with using the single failure function for both the uncontrolled and controlled ***,TMDs slightly reduced the seismic fragility and have the capability to improve the reliability of the ***,it was found that the fragility was significantly influenced by the values of the capacity thresholds of both the acceleration of the structure and TMD stroke length,which should be selected by considering the target performance and application of the structure and control device.

关键词： fragility curves multiple failure function passive control tuned mass dampers

Experimental and modeling study of the kinetics of methane hydrate formation and dissociation

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Chinese Journal of Chemical Engineering 2021年第1期34卷 365-374页

作者： Vafa Feyzi Vahid mohebbi Ahvaz Petroleum Faculty Petroleum University of Technology(PUT)AhvazIran

In this work,several experiments were conducted at isobaric and isothermal condition in a CSTR reactor to study the kinetics of methane hydrate formation and *** were performed at five temperatures and three pressure levels(corresponding to equilibrium pressure).Methane hydrate formation and dissociation rates were modeled using mass transfer limited kinetic models and mass transfer coefficients for both formation and dissociation were *** of results,shows that mass transfer coefficients for methane hydrate dissociation are one order greater than formation *** transfer coefficients were correlated by polynomials as relations of pressure and *** results and the method can be applied for prediction of methane production from naturally occurring methane hydrate deposits.

关键词： Methane hydrate Kinetics Formation Dissociation Mass transfer

A Numerical Algorithm for Determination of a Control Parameter in Two-dimensional Parabolic Inverse Problems

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Acta Mathematicae Applicatae Sinica 2015年第1期31卷 213-224页

作者： Akbar mohebbi Department of Applied Mathematics Faculty of Mathematical Science University of Kashan

Numerical solution of the parabolic partial differential equations with an unknown parameter play a very important role in engineering applications. In this study we present a high order scheme for determining unknown control parameter and unknown solution of two-dimensional parabolic inverse problem with overspe- cialization at a point in the spatial domain. In this approach, a compact fourth-order scheme is used to discretize spatial derivatives of equation and reduces the problem to a system of ordinary differential equations （ODEs）. Then we apply a fourth order boundary value method to the solution of resulting system of ODEs. So the proposed method has fourth order of accuracy in both space and time components and is unconditionally stable due to the favorable stability property of boundary value methods. The results of numerical experiments are presented and some comparisons are made with several well-known finite difference schemes in the literature. Also we will investigate the effect of noise in data on the approximate solutions.

关键词： compact finite difference scheme boundary value method control parameter parabolic inverseproblem temperature over=specification high accuracy noise

Generation of 40-as few-cycle pulse through chirp manipulation

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Chinese Optics Letters 2012年第8期10卷 50-52页

作者： Masoud mohebbi Saeed Batebi Department of Physics Faculty of ScienceUniversity of Guilan No.41335-19141RashtIran

We discuss theoretically how supercontinuum spectra produced from high-order harmonic generation processes in a synthesized same-color laser field is optimized by adjusting the chirp parameter of the controlling pulse. Furthermore, a 40-attosecond isolated pulse with an effective bandwidth of 121 orders is obtained from He＋ ion when the chirp rate ratio of pulses has a small value. The numerical results show that the efficiency of single as pulse generation is enhanced, and the quantum paths are controlled successfully. Our simulation shows that the produced pulses with high signal-to-noise ratio are obtained straightforwardly without any phase compensation. These results are explained using the classical approach.

关键词： 190.0190 Nonlinear optics 140.0140 Lasers and laser optics