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Determination of oil well production performance using artificial neural network (ANN) linked to the particle swarm optimization (PSO) tool

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Petroleum 2015年第2期1卷 118-132页

作者： Mohammad Ali Ahmadi Reza Soleimani Moonyong Lee Tomoaki Kashiwao alireza.bahadori Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of TechnologyAhwazIran Young Researchers and Elite Club Neyshabur BranchIslamic Azad UniversityNeyshaburIran School of Chemical Engineering Yeungnam UniversityGyeungsanRepublic of Korea Department of Electronics and Control Engineering National Institute of TechnologyNiihama College7-1 Yagumo-choNiihamaEhime 792-8580Japan School of Environment Science&EngineeringSouthern Cross UniversityLismoreNSWAustralia

Greater complexity is involved in the transient pressure analysis of horizontal oil wells in contrast to vertical wells,as the horizontal wells are considered entirely horizontal and parallel with the top and underneath boundaries of the oil ***,there is an essential need to estimate productivity of horizontal wells accurately to examine the effectiveness of a horizontal well in terms of technical and economic *** this work,novel and rigorous methods based on two different types of intelligent approaches including the artificial neural network(ANN)linked to the particle swarm optimization(PSO)tool are developed to precisely forecast the productivity of horizontal wells under pseudo-steady-state *** was found that there is very good match between the modeling output and the real data taken from the literature,so that a very low average absolute error percentage is attained(e.g.,<0.82%).The developed techniques can be also incorporated in the numerical reservoir simulation packages for the purpose of accuracy improvement as well as better parametric sensitivity analysis.

关键词： Well productivity Drainage area Skin factor Least square Support vector machine Hybrid connectionist model Particle swarm optimization

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PREPARATION, CHARACTERIZATION AND ADHESIVE PROPERTIES OF DI-AND TRI-HYDROXY BENZOYL CHITOSAN NANOPARTICLES

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Chinese Journal of Polymer Science 2013年第4期31卷 649-659页

作者： Mohamad Taghi Taghizadeh Ali bahadori Department of Physical Chemistry Faculty of ChemistryUniversity of TabrizTabrizIran

Modified chitosans with 3,4-di-hydroxy benzoyl groups （CS-DHBA） and 3,4,5-tri-hydroxy benzoyl groups （CS- THBA） were synthesized and their nanoparticles were prepared via ionic crosslinking by tripolyphosphate （TPP）. The chemical structure and degree of substitution （DS） of di- and tri-hydroxy benzoyl chitosans are determined by FTIR and IH- NMR spectroscopy. The morphology of particles, size distribution and zeta potential of nanoparticles were studied using transmission electron microscopy （TEM） and dynamic light scattering （DLS）, respectively. The mean diameters of particles of CS-DHBA and CS-THBA nanoparticles were 144 nm and 112 nm, respectively. It was found that the particles size decreased slightly with decreasing the degree of substitution and increasing degree of deacetylation （DD）, due to increasing of ionic crosslinking of ammonium ions and polyanions of tripolyphosphate. The TEM photographs of CS-DHBA show that these particles are spherical in shape, but the particles of CS-THBA show some aggregation. In addition, the solubility and the mechanical properties of the prepared modified chitosans and their nanoparticles were evaluated for bio-adhesive and biomedical application. The results of solubility tests indicated that, the CS-DHBA and CS-THBA have higher solubility at pH 〉 7 comparing to CS. Also the CS-DHBA, CS-THBA and their nanoparticles showed a significant adhesive capacity and enhanced tensile strength and tensile modulus.

关键词： Nanoparticles Di- and tri-hydroxy benzoyl chitosans Ionic cross linking Solubility Adhesive properties.

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Microbiostratigraphy, microfacies and sequence stratigraphy of upper cretaceous and paleogene sediments, Hendijan oilfield, Northwest of Persian Gulf, Iran

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Natural Science 2013年第11期5卷 1165-1182页

作者： Bahman Soleimani alireza.bahadori Fanwei Meng Department of Geology Faculty of Earth Sciences Shahid Chamran University Ahvaz Iran State Key Laboratory of Paleobiology and Stratigraphy Nanjing Institute of Geology and Paleontology Chinese Academy of Sci- ences Nanjing China

Hendijan oilfield is located on Northwest of Pesian Gulf offshore of Iran and geologically in the Dezful embayment. In this study, the paleosedimentary depositional environment of the Early Cenomanian to Late Eocene deposits of the Sarvak, Ilam, Gurpi, Pabdeh and JahrumPabdeh Formations was evaluated using microbiostratigraphy, microfacies and D-INPEFA curves which are an accurate method in sequence stratigraphy in terms of regression and transgression of the sea. Also, we used limited elemental geochemical data of oxygen and carbon isotopes in compare with palaeontological data to infer the upper part, 10 m, of the Sarvak Formation. Statistical correlation analyses of geochemical data from upper part of the Sarvak Formation enable inference of differences in paleoconditions at this part and Sarvak Formation, and another Formation, Ilam, was distinguished. Palaentilogical analysis using planktonic foraminifera and calcareous nannofossils enables inference about time scale of each Formation. Petrographic data and different sediment textures support those inferences resulted from Gamma ray logs as D-INPEFA curves about different paleo-conditions that occurred during the development of the studied Formations. Synthesis of the analyses leads to the final interpretation that upper Cretaceous, Sarvak, Ilam and Gurpi Formations, at the Hendijan oil field were formed in a carbonate ramp that was likely closed to the open sea, where Gurpi Formation was deposited, by a shallow barrier that allowed seawater recharge into the basin and deep marine basin where Paleogene sediments, Pabdeh and Jahrum-Pabdeh, were deposited.

关键词： Upper Cretaceous Paleogene Planktonic Foraminifera Microfacies Sequence Stratigraphy Hendijan Oil Field (SW Iran)

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A new approach for correlating of H_(2)S solubility in[emim][Lac],[bmim][ac]and[emim][pro]ionic liquids using two-parts combined models

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Chinese Journal of Chemical Engineering 2022年第4期35卷 521-527页

作者： alireza Afsharpour Faculty of Chemical and Materials Engineering Shahrood University of TechnologyShahroodIran

Two bi-part combined models containing reaction equilibrium thermodynamic model and an equation of state(EoS)including cubic plus association(CPA)or modified Soave-Redlich-Kwong(SRK),were employed to correlate H_(2)S solubility in ionic liquids[emim][Lac],[bmim][Ac]and[emim][Pro].RETM and CPA/mSRK are responsible for chemical and phase equilibria calculations,*** RETM defines a complex formation reaction between an H_(2)S and two IL molecules into the liquid phase so that a complex in the form of H_(2)S(IL)_(2)is probable to *** the other side,CPA/mSRK EoSs perform phase equilibria computations to find pressure and vapor phase *** the case of CPA,both of H_(2)S and the ionic liquids were considered as self-associating components which pursue 4 C and 2 B schemes,*** model computes the pure IL parameters using experimental density *** this work,critical properties were estimated through the modified Lydersen-Joback-Reid method,Eotvos and Guggenheim ***,the binary systems were investigated by applying *** presents average absolute deviations(AADs)equal to 2.41%,13.42%and 3.52%for[emim][Lac],[bmim][Ac],and[emim][Pro],***,the AADs obtained by mSRK are 3.75%,5.07%,and 6.06%,*** it is evident from the results,the combination of RETM with both CPA and m SRK EoSs will result in good correlation accuracy.

关键词： Solubility Thermodynamics Ionic liquids CPA RETM mSRK

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Hot-nanoparticle-mediated fusion of selected cells

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Nano Research 2017年第6期10卷 2034-2045页

作者： Azra bahadori Lene B. Oddershede Poul M. Bendix Blegdamsvej 17 Niels Bohr Institute University of Copenhagen 2100 Copenhagen Denmark Lundbeck Foundation Center for Biomembranes in Nanomedicine University of Copenhagen 2100 Copenhagen Denmark

Complete fusion of two selected ceils allows for the creation of novel hybrid cells with inherited genetic properties from both original cells. Alternatively, via fusion of a selected cell with a selected vesicle, chemicals or genes can be directly delivered into the cell of interest, to control cellular reactions or gene expression. Here, we demonstrate how to perform an optically controlled fusion of two selected cells or of one cell and one vesicle. Fusion is mediated by laser irradiating plasmonic gold nanoparticles optically trapped between two cells （or a vesicle and a cell） of interest. This hot-particle-mediated fusion causes total mixing of the two cytoplasms and the two cell membranes resulting in formation of a new hybrid cell with an intact cell membrane and enzymatic activity following fusion. Similarly, fusion between a vesicle and a cell results in delivery of the vesicle cargo to the cytoplasm, and after fusion, the cell shows signs of viability. The method is an implementation of targeted drug delivery at the single-cell level and has a great potential for cellular control and design.

关键词： cell fusion membrane fusion gold nanoparticle plasmonic heating optical trapping

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Progressive collapse resisting capacity of reinforced concrete load bearing wall structures

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Journal of Central South University 2015年第7期22卷 2730-2738页

作者： alireza Rahai alireza Shahin Farzad Hatami Department of Civil Engineering Amirkabir University of Technology (Tehran Polytechnic) No.424 Structural & Earthquake Research Center (SERC) Amirkabir University of Technology No.424

Reinforced concrete(RC) load bearing wall is widely used in high-rise and mid-rise buildings. Due to the number of walls in plan and reduction in lateral force portion, this system is not only stronger against earthquakes, but also more economical. The effect of progressive collapse caused by removal of load bearing elements, in various positions in plan and stories of the RC load bearing wall system was evaluated by nonlinear dynamic and static analyses. For this purpose, three-dimensional model of 10-story structure was selected. The analysis results indicated stability, strength and stiffness of the RC load-bearing wall system against progressive collapse. It was observed that the most critical condition for removal of load bearing walls was the instantaneous removal of the surrounding walls located at the corners of the building where the sections of the load bearing elements were changed. In this case, the maximum vertical displacement was limited to 6.3 mm and the structure failed after applying the load of 10 times the axial load bored by removed elements. Comparison between the results of the nonlinear dynamic and static analyses demonstrated that the "load factor" parameter was a reasonable criterion to evaluate the progressive collapse potential of the structure.

关键词： reinforced concrete(RC) load bearing wall structure progressive collapse fiber sections nonlinear analysis load factor method

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Effect of inlet temperature and equivalence ratio on HCCI engine performance fuelled with ethanol:Numerical investigation

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Journal of Central South University 2016年第1期23卷 122-129页

作者： alireza Rahbari Department of Mechanical Engineering Shahid Rajaee Teacher Training University (SRTTU)

A numerical model is presented to investigate the performance of homogeneous charge compression ignition(HCCI) engines fueled with ethanol. Two approaches are studied. On one hand, two-step reaction mechanisms with Arrhenius reaction rates are implemented in combustion chemistry modeling. On the other hand, a reduced mechanism containing important reactions of ethanol involving heat release rate and reaction rates compatible with experimental data is employed. Since controls of combustion phenomenon and ignition timing are the main issues of these engines, the effects of inlet temperature and equivalence ratio as the controlling factors on the operating parameters such as ignition timing, burn duration, in-cylinder temperature and pressure of HCCI engines are explored. The results show that the maximum predicted pressures for thermodynamic model are about 71.3×10~5 Pa and 79.79×10~5 Pa, and for chemical kinetic model, they are about 71.48×10~5 Pa and 78.123×10~5 Pa, fairly comparable with corresponding experimental values of 72×10~5 Pa and 78.7×10~5 Pa. It is observed that increasing the initial temperature advances the ignition timing, decreases the burn duration and increases the peak temperature and pressure. Moreover, the maximum temperature and pressure are associated with richer mixtures.

关键词： HCCI engine ethanol two-step reaction mechanism model chemical kinetic model

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A new artificial bee swarm algorithm for optimization of proton exchange membrane fuel cell model parameters

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第8期12卷 638-646页

作者： alireza ASKARZADEH alireza REZAZADEH Faculty of Electrical and Computer Engineering Shahid Beheshti University

An appropriate mathematical model can help researchers to simulate,evaluate,and control a proton exchange membrane fuel cell (PEMFC) stack *** a PEMFC is a nonlinear and strongly coupled system,many assumptions and approximations are considered during ***,some differences are found between model results and the real performance of *** increase the precision of the models so that they can describe better the actual performance,opti-mization of PEMFC model parameters is *** this paper,an artificial bee swarm optimization algorithm,called ABSO,is proposed for optimizing the parameters of a steady-state PEMFC stack model suitable for electrical engineering *** studying the usefulness of the proposed algorithm,ABSO-based results are compared with the results from a genetic algo-rithm (GA) and particle swarm optimization (PSO).The results show that the ABSO algorithm outperforms the other algorithms.

关键词： Proton exchange membrane fuel cell stack model Parameter optimization Artificial bee swarm optimization algorithm

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Simultaneous effects of mesh refinement, grid configuration and wall boundary condition on prediction of pressure gradients and velocity profiles of microparticles in a conical fluidized bed

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Particuology 2019年第2期17卷 123-136页

作者： alireza Bahramian Department of Chemical Engineering Ha med an University of Technology P.O. Box 65155 Hamedan Iran

The reliability and accuracy of numerical results of microparticle fluidization in a conical bed, affected simultaneously by mesh refinement, the grid configuration and the wall boundary condition (BC), are analyzed. Specifically, pressure gradients and velocity profiles of titania powder are studied for a conical bed. The Gidaspow drag correlation and different wall BCs are considered using a Eulerian-Eulerian two-fluid model. Predictions of the pressure fluctuation, power spectra of the corresponding pressure fluctuations, bed pressure drop, minimum fluidizati on veloc ity, axial solid velocity, bed expansi on ratio, and particle size distribution are compared with experimental data. Mesh sensitivity analysis using hexahedral and tetrahedral cells with a un iform mesh and n ear-wall mesh refineme nr is con ducted to inv estigate the effects of mesh configurations in estimating particle flow patterns. Simulations show that significant savings in terms of computational time are realized by choosing a uniform mesh while the hexahedral structure, the near-wall mesh refinement, and the free-slip BC give the closest fit to the experimental data.

关键词： Conical fluidized bed Mesh configuration Grid refinement Velocity field Pressure gradie nt

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A comparative study between gravel and rubber drainage columns for mitigation of liquefaction hazards

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第5期10卷 924-934页

作者： Hadi bahadori Roohollah Farzalizadeh Ali Barghi Araz Hasheminezhad Department of Civil Engineering Urmia University

Liquefaction is one of the most destructive natural hazards that cause damage to engineering structures during an earthquake. This study aims to examine the effect of rubber and gravel drainage columns on the reduction of liquefaction potential of saturated sandy soils using a shaking table. Experiments were carried out in various conditions such as construction materials, different arrangements and diameters of drainage columns. Effects of the relative density and the input motion on the base test were investigated as well. The results demonstrate that rubber drainage columns have slightly better performance compared to gravel drainage columns at high relative density and high input acceleration. Soil improvement using gravel drainage columns, which leads to reduction in liquefaction effects at moderate input acceleration and low relative density, is a more effective method than that using rubber drainage columns. By increasing the number and diameter of gravel and rubber drainage columns, deformations due to liquefaction are reduced. The drainage rate of gravel drains is higher than that of rubber drains after shaking. Totally, the outcomes indicate that densification is the most important factor controlling liquefaction.

关键词： Liquefaction Soil improvement Drainage columns Shaking table test

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