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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： lung cancer (LC) scapula tuberculosis metastasis adenocarcinoma

CFD simulation and optimization of an industrial cement gas-solid air classifier

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Particuology 2024年第6期89卷 172-184页

作者： Mohamadreza Esmaeilpour ali mohebbi Vahab Ghalandari Department of Chemical Engineering Faculty of EngineeringShahid Bahonar University of KermanKermanIran Kerman Momtazan Cement Company KermanIran

An air classifier is one of the main and effective devices in cement *** this study,a three-dimensional,steady and two-phase(solid-gas)computational fluid dynamics(CFD)simulation was performed to optimize the performance of this device in the Kerman Momtazan cement plant,*** the validation of CFD results,the air flow field and air path lines between fixed blades were checked carefully and the non-uniformity in velocity distribution and the formation of vortex flows between the blades close to particle inlets were *** study tried to improve the device efficiency by changing the method of entering particles into the device,resulting in a reduction in air classifier electrical energy consumption(from 41 to 35(kW h)/t)and an increase in production rate(from 203 to 214 t/h).Additionally,the study investigated the effects of other modifiable operating conditions like rotary cage rotation speed,pressure difference,and inlet air temperature on the particle size distribution and classifier *** results showed that increasing the cage rotation speed decreased the product rate and the product particles mean diameter while increasing pressure difference or increasing temperature increased the product rate and the product particles mean *** was concluded that these modifiable operating conditions can significantly affect the performance of the air classifier in the cement industry.

关键词： Cement air classifier Computational fluid dynamics Gas-solid two-phase flow Optimization Eulerian-Lagrangian method Efficiency

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

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

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

Synthesis and antibacterial activity of Schiff bases of 5-substituted isatins

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Chinese Chemical Letters 2016年第2期27卷 221-225页

作者： Kamaleddin Haj Mohammad Ebrahim Tehrani Maryam Hashemi Maryam hassan Farzad Kobarfard Shohreh mohebbi Department of Medicinal Chemistry School of PharmacyZanjan University of Medical SciencesZanjanlran Department of Pharmaceutical Biotechnology School of PharmacyZanjan University of Medical SciencesZanjanIran Department of Medicinal Chemistry School of PharmacyShahid Beheshti University of Medical SciencesTehranIran Phytochemistry Research Center Shahid Beheshti University of Medical SciencesTehranIran

Based on the existing reports on the bioactive isatin derivatives, a number of Schiff bases were synthesized by reacting 5-substituted isatins with bioactive amines/hydrazides and their structures were confirmed using spectroscopic methods such as NMR, IR and mass spectrometry. Furthermore, Nbenzylation of isatin followed by the Schiff base formation furnished a new series of compounds（11a-13c） which allowed the analysis of the effect of isatin N-substitution on the bioactivity of the resulting compounds. The antibacterial activity of the synthesized derivatives was evaluated using a microtiter plate method on a series of gram positive and gram negative bacterial strains. Compounds 2d, 3b, 5c and 6a were among the most potent derivatives against Pseudomonas aeruginosa（MIC = 6.25 μg/m L）.Analysis of the structure-activity relationship showed that the incorporation of（thio）urea-based Schiff bases lead to more potent derivatives with a broader spectrum of antibacterial activity. In addition,highly lipophilic compounds such as 11a-12c did not show any measurable antibacterial activity, which implies that an optimal lipophilicity might be an important requirement for the antibacterial activity of the studied isatins. Finally, the finding that hydantoin derivatives of N-benzylisatins（13a-13c） still exhibit some antibacterial activity prompted us to consider exploring the bioactivity of more diverse derivatives of isatin-aminohydantoin Schiff bases（compounds 1a-1d） in our future studies.

关键词： Synthesis Isatin Schiff base Hydantoin Antibacterial

Pushover analysis of asymmetric-plan buildings based on distribution of the combined modal story shear and torsional moment

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Earthquake Engineering and Engineering Vibration 2014年第4期13卷 707-716页

作者： Kazem Shakeri Karim Tarbali Mohtasham mohebbi Faculty of Engineering University of Mohaghegh Ardabili International Institute of Earthquake Engineering and Seismology

A pushover procedure with a load pattern based on the height-wise distribution of the combined modal story shear and torsional moment is proposed to estimate the seismic response of 3D asymmetric-plan building frames. Contribution of the higher modes and torsional response of asymmetric-plan buildings are incorporated into the proposed load pattern. The proposed pushover method is a single-run procedure, which enables tracing the nonlinear response of the structure during the analysis and averts the elusiveness of conducting multiple pushover analyses. The proposed method has been used to estimate the response of two moment-resisting building frames with 9 and 20 stories. The obtained results indicate the appropriate accuracy and efficiency of the proposed procedure in estimating the trend of the drift profiles of the structures resulted from nonlinear time history analyses.

关键词： pushover analysis asymmetric-plan building torsional response story shear torsional moment

Experimental and statistical assessments of the mechanical strength reliability of gamma alumina catalyst supports

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Particuology 2015年第4期13卷 74-81页

作者： Abdolreza Samimi Mozhgan Zakeri Basir Maleki Davod mohebbi-Kalhori Department of Chemical Engineering University of Sistan and Baluchestan

The mechanical strength of solid catalysts is considered an important factor in terms of ensuring the reliable performance of industrial reactors. In this work, a pelletizing method was used to form gamma alumina support for catalysts. Response surface methodology （RSM） was employed to analyze and model the effects of various manufacturing parameters on the crushing strength of the supports. These parameters were binder concentration, compaction pressure, calcination temperature, and drying mode. The suggested model was verified by applying an analysis of variance to assess its validity with regard to crushing strength. The mechanical reliability of various supports was also determined by calculating their Weibull modulus values through linear regression of the Weibull equation. The material with the highest mechanical strength reliability will have both a high mean crushing strength and a high Weibull modulus, and the best values obtained for a support in this work were 70.7 MPa and 6.63, respectively. The conditions used to form this sample were： 20mass% binder concentration, 861 MPa compaction pressure, 466 ℃ calcination temperature, and gentle drying.

关键词： Crushing strength Brittle material Weibull modulus Pelletizing Response surface methodology