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Integrated asset management:a case study of technical and economic optimization of surface and well facilities

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Petroleum Science 2019年第5期16卷 1221-1236页

作者： Arman Darvish sarvestani Ali Moazami Goodarzi Ali Hadipour Oil&Gas Reservoir Engineering Department Tarh-o-Palayesh Engineering CompanyTehranIran Process and Mechanical Group Tarh-o-Palayesh Engineering CompanyTehranIran

Oil production could be increased by using optimization techniques in each stage of oil production system from field to production ***,the maximum profit will be obtained once integrated optimization of surface and subsurface components of the oil production system is *** addition,when using high-tech equipment and facilities,an integrated study of well and surface facilities affects the economic benefits *** this work,one of the Iranian brown fields(mature or declining production fields)was studied to find the best renovation plan with maximum *** base scenario was designed with four stages of separation,and the high-pressure gases from the first and the second separator were planned to be sold,while the low-pressure gases from subsequent stages were supposed to be *** this paper,two additional scenarios,namely separator optimization and full optimization,were proposed and 12 cases were *** the full optimization scenario,low-pressure gases were prevented from being *** was observed that by stopping the flaring systems,gas production rate increases as high as 20%and 150 to 200 MW power will be generated in all cases during the next 20 ***,economic evaluation for all of the cases was done and different cases were compared in terms of incremental annual worth and payback period.

关键词： Separator Electricity Gas lift Flare NPV Optimization

Practical reduction of imines by NaBH_4/alumina under solvent-free conditions:An efficient route to secondary amine

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Chinese Chemical Letters 2008年第10期19卷 1167-1170页

作者： Foad Kazemi Ali Reza Kiasat Ebrahim sarvestani Institute for Advanced Studies in Basic Sciences(IASBS) Zanjan 45195Iran Chemistry Department College of ScienceShahid Chamran UniversityAhvaz 61357-4-3169Iran

Sodium borohydride supported on alumina reduces imines to the corresponding secondary amines in high to excellent isolated yields under solvent-free conditions. Noteworthy is that highly chemoselective reactions were ... 详细信息

关键词： Imine Secondary amine Solvent free Reduction Sodium borohydride

Detection of Pulsation and Additional Components in Eclipsing Binary RS Sct

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Research in Astronomy and Astrophysics 2023年第12期23卷 190-203页

作者： A.abedi K.Y.Roobiat Department of Physics Faculty of SciencesUniversity of BirjandBirjandIran Dr.Mojtahedi Observatory University of BirjandBirjandIran

The eclipsing binary star RS Sct is a semi-detached system of theβLyrae *** system was photometered for six nights in 2019 August,and 2020 June and *** light and radial velocity curves were simultaneously analyzed to obtain the absolute physical and orbital parameters of the system,and the system geometry was *** this system,the primary component has filled its inner Roche lobe and the secondary component is close to filling ***,the change in the orbital period of this system was *** presence of the third or fourth components and the mass transfer between the two components affect the orbital period of the *** addition,the pulsation of the primary component was ***,several frequencies with high signal-to-noise ratios were *** to the position of the primary component in the H-R diagram and the value of the obtained frequencies,this component is likely a delta-Scuti pulsator.

关键词： (stars:)binaries eclipsing-stars individual(RS Sct)-methods data analysis-techniques photometric

A bright future for the tree shrew in neuroscience research:Summary from the inaugural Tree Shrew Users Meeting

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Zoological Research 2021年第4期42卷 478-481页

作者： Elise Savier Madineh Sedigh-sarvestani Ralf Wimmer David Fitzpatrick University of Virginia CharlottesvilleVirginia 22903-1738USA Max Planck Florida Institute for Neuroscience JupiterFlorida 33458-2906USA Massachusetts Institute of Technology CambridgeMassachusetts 02139-4307USA

Tree shrews(Tupaia spp.)have been used in neuroscience research since the 1960s due to their evolutionary proximity to *** use of and interest in this animal model have recently increased,in part due to the adaptation of modern neuroscience tools in this *** tools include quantitative behavioral assays,calcium imaging,optogenetics and *** facilitate the exchange and development of these new technologies and associated research findings,we organized the inaugural“Tree Shrew Users Meeting”which was held online due to the COVID-19 ***,we review this meeting and discuss the history of tree shrews as an animal model in neuroscience research and summarize the current themes being investigated using this animal,as well as future directions.

关键词： Tree Shrew Users Meeting Animal models Tupaia Neuroscience

A Note on Locally Primitive Arc-Transitive Graphs of Valency8

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Algebra Colloquium 2024年第4期31卷 541-548页

作者： Fateme abedi M.Reza Salarian Faculty of Mathematical Sciences and Computer Kharazmi UniversityIran

Let X be a connected G-locally primitive arc-transitive graph for some sub-group G of Aut(X).Suppose that X is a(G,s)-transitive *** this paper,we give a characterization of the vertex-stabilizer G,when X has valency 8.

关键词： arc-transitive graph s-transitive graph (G s)-transitive graph locally prim-itivegraph

In vitro-derived insulin-producing cells modulate Th1 immune responses and induce IL-10 in streptozotocin-induced mouse model of pancreatic insulitis

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Hepatobiliary & Pancreatic Diseases International 2021年第4期20卷 376-382页

作者： Gholamreza Daryabor Esmaeil Hashemi Shiri Zahra Amirghofran Eskandar Kamali-sarvestani Autoimmune Diseases Research Center Medical SchoolShiraz University of Medical SciencesShiraz 71345-1798Iran Department of Immunology Medical SchoolShiraz University of Medical SciencesShiraz 71345-1798Iran

Background: Insulitis is defined by the presence of immune cells infiltrating in the pancreatic islets that might progress into the complete β-cell loss. The immunomodulatory properties of bone marrow-derived mesenchymal stem cells(BM-MSCs) have attracted much attention. This study aimed to evaluate the possible immunomodulatory effects of rat BM-MSCs and MSCs-derived insulin-producing cells(IPCs) in a mouse model of pancreatic insulitis. Methods: Insulitis was induced in BALB/c mice using five consecuti ve doses of streptozotocin. MSCs or IPCs were directly injected into the pancreas of mice and their effects on the expression of Th subsetsrelated genes were evaluated. Results: Both BM-MSCs and IPCs significantly reduced the expression of pancreatic Th1-related IFN-γ( P < 0.001 and P < 0.05, respectively) and T-bet genes(both P < 0.001). Moreover, the expression of IL-10 gene was significantly increased in IPC-treated compared to BM-MSC-or PBS-treated mice( P < 0.001 both comparisons). Conclusions: BM-MSCs and IPCs could successfully suppress pathologic Th1 immune responses in the mouse model of insulitis. However, the marked increase in IL-10 gene expression by IPCs compared to BM-MSCs suggests that their simultaneous use at the initial phase of autoimmune diabetes might be a better option to reduce inflammation but these results need to be verified by further experiments.

关键词： Immunomodulation Insulitis Insulin-producing cells Mesenchymal stem cells Streptozotocin Th1 cell

Determination of arsenic in air particulates and diesel exhaust particulates by spectrophotometry

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Journal of Environmental Sciences 2005年第1期17卷 156-158页

作者： S.M.Talebi M.abedi DepartmentofChemistry IsfahanUniversityIsfahan81745Iran

A method was developed for the determination of trace arsenic by spectrophotometry. The proposed method is rapid, simple, and inexpensive. This method can be used for sensitive determination of trace arsenic in environmental samples and especially in air particulates. The results obtained by this method as a proposed method were compared with those obtained by hydride generation atomic absorption spectrometry as a popular reported method for the determination of arsenic and an excellent agreement was found between them. The method was also used for determination of arsenic associated with airborne particulate matter and diesel exhaust particulates. The results showed that considerable amount of arsenic are associated with diesel engine particulates. The variation in concentration of arsenic was also investigated. The atmospheric concentration of arsenic was different in different sampling stations was dependent to the traffic density.

关键词： arsenic air particulates diesel exhaust particulates spectrophotometry

Quantum-dot Semiconductor Optical Amplifiers in State Space Model

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计算物理 2013年第4期30卷 605-612页

作者： Hussein Taleb Kambiz abedi Saeed Golmohammadi Department of Electrical Engineering Faculty of Electrical and Computer Engineering Shahid Beheshti University G. C. Evin ***Tehran Iran Nanophotonics Group School of Engineering-Emerging Technologies University of Tabriz Tabriz *** Iran

A state space model(SSM) is derived for quantum-dot semiconductor optical amplifiers(QD-SOAs).Rate equations of QD-SOA are formulated in the form of state update equations,where average occupation probabilities along QD-SOA cavity are considered as state variables of the *** show that SSM calculates QD-SOA′s static and dynamic characteristics with high accuracy.

关键词： quantum-dot rate equation model semiconductor optical amplifiers state space model

Phase-Controlled Transparent Superluminal Light Propagation in a Doppler-Broadened Four-Level N-Type System

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Communications in Theoretical Physics 2014年第4期61卷 506-516页

作者： Lida Ebrahimi Zohravi Majid abedi Mohammad Mahmoudi Department of Physics University of ZanjanUniversity Blvd Institute for Advanced Studies in Basic Sciences

The propagation of a weak probe field in a four-level N-type quantum system in the presence of spontaneously generated coherence(SGC) is theoretically investigated. The optical properties of the system are studied and it is shown that the group velocity of light pulse can be controlled by relative phase of applied fields. By changing the relative phase of applied fields, the group velocity of light pulse changes from transparent subluminal to the transparent superluminal light propagation. Thus, the phase-controlled absorption-free superluminal light propagation is obtained without applying an incoherent laser fields to the system. The propagation of a weak probe light pulse is studied by solving the Maxwell's wave equation on numerical grid in space and time. Moreover, we study the third order self- and cross-Kerr susceptibility of probe field and calculate the nonlinear cross-phase shift for different values of intensity of applied fields. In addition, we take into account the effect of Doppler broadening on the light pulse propagation and it is found that a suitable choice of laser propagation directions allows us to preserve our results even in the presence of Doppler effect. It is demonstrated that by increasing the Doppler width of distribution to the room temperature,the dispersion changes from transparent subluminal to transparent superluminal light propagation which is our major motivation for this work.

关键词： coherent control spontaneously generated coherence superluminal