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Wettability modification effects on relative permeability end-points:Comparative analysis of surfactant agents for enhanced oil recovery

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Petroleum Research 2024年第2期9卷 206-218页

作者： erfan hosseini Negar hosseini Mohammad Sarmadivaleh Exploration Directorate National Iranian Oil Company(NIOC)TehranIran Department of Petroleum Engineering Islamic Azad University(IAU)IlamIran WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWestern AustraliaAustralia

This research examines the impact of wettability alteration on the end points of relative permeability,a crucial property of fluids and porous media that influences the displacement processes of immiscible fluids through such *** estimation of the mobility ratio for oil recovery relies on these end points,which are influenced by connate water saturation and residual oil *** investigate this relationship,carbonate rock is generally subjected to wettability alteration using surfactant agents,and core flooding is employed to determine the relative permeability before and after the *** wettability of the rock is commonly assessed through contact angle *** surfactants,TritonX-100(Tx-100)and Cedar,were tested in reducing the wettability of the porous media for *** contact angle measurements revealed that Tx-100 was more effective for this purpose than ***,the relative permeability tests indicated that both surfactants decreased residual oil saturation,but Tx-100 also improved system *** contrast,Cedar reduced residual oil saturation but increased system pressure,possibly because of its high *** results also demonstrate that injecting Tx-100 leads to a 14%increase in ultimate oil recovery compared with water injection,while Cedar injection increased the recovery factor by 5%.This difference may be attributed to the incomplete coverage of the pore wall by Cedar or its weaker chemical structure than ***,in carbonate cores,neither non-ionic surfactant enhanced oil recovery.

关键词： Wettability alteration Relative permeability Core flooding Tx-100 Cedar Contact angle

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Developing a phenomenological model to simulate single and mixed scale formation during flow in porous media:Coupling a salt precipitation model with an ion transport equation under dynamic conditions

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Petroleum Research 2024年第1期9卷 17-36页

作者： erfan hosseini Dana Mohammad Nazar Negar hosseini Mohammad Sarmadivaleh Exploration Directorate National Iranian Oil Company(NIOC)TehranIran Institute of Physical Chemistry and Polymer Physics Leibniz Institute of Polymer Research DresdenDresdenGermany Department of Petroleum Engineering Islamic Azad University(IAU)IlamIran WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWestern AustraliaAustralia

Water flooding and pressure maintenance are recommended to improve oil recovery practices after low recovery of petroleum reservoirs occurs during primary *** crystal formation is a frequent occurrence when using these *** experimental,numerical,and theoretical studies have been done on the mechanisms underlying scaling and permeability reduction in porous media;however,there has not been a satisfactory model *** study developed a phenomenological model to predict formation damage caused by salt *** with existing models,which provide a scaling tendency,the proposed model predicts the profile of scale *** salt precipitation model simulates reactive fluid flow through porous media.A thermodynamic,kinetic,and flow hydrodynamic model was developed and coupled with the ion transport equation to describe the movement of ***,a set of carefully designed dynamic experiments were conducted and the data were compared with the model *** forecasts and experimental data were observed to have an average absolute error(AAE)ranging from 0.68%to 5.94%,which indicates the model's suitability.

关键词： Improved oil recovery Water flooding Formation damage Scaling tendency Salt precipitation

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Simultaneous Employment of Generation Rescheduling and Incentive-based Demand Response Programs for Congestion Management in Case of Contingency

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 902-912页

作者： Seyed erfan hosseini Alimorad Khajehzadeh Mahdiyeh Eslami Department of Electrical Engineering Kerman branchIslamic Azad UniversityKermanIran

Relieving congestion significantly influences the operation and security of the transmission ***,the congestion alleviation of transmission network in all power systems is ***,it could prevent price spikes and/or involuntary load shedding and impose high expenses on the transimission network,especially in case of ***,the increasing or decreasing generation rescheduling has been used as one of the most imperative approaches for correctional congestion management when a contingency ***,demand response programs(DRPs)could also be a vital tool for managing the ***,the simultaneous employment of generation rescheduling and DRPs is proposed for congestion management in case of *** objective is to reschedule the generation of power plants and to employ DRPs in such a way so as to lessen the cost of *** crow search algorithm is employed to determine the *** accuracy and efficiency of the proposed approach are assessed through the tests conducted on IEEE 30-bus and 57-bus test *** results of various case studies indicate the better performance of the proposed approach in comparison with different approaches presented in the literature.

关键词： Congestion management demand response generation rescheduling transmission economy transmission lines

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Fabrication of La,Ce co-doped ZnO nanorods for improving photodegradation of methylene blue

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Journal of Rare Earths 2024年第1期42卷 76-83,I0003页

作者： erfan Hakim Azmal Zaid Jin-Chung Sin Sze-Mun Lam Abdul Rahman Mohamed School of Chemical Engineering Universiti Sains Malaysia(USM)14300Nibong TebalPenangMalaysia College of Environmental Science and Engineering Guilin University of TechnologyGuilin541004China Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control Guilin University of TechnologyGuilin541004China Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of TechnologyGuilin541004China Faculty of Engineering and Green Technology Universiti Tunku Abdul RahmanJalan UniversitiBandar Barat31900KamparPerakMalaysia

La,Ce co-doped ZnO nanorods(ZnLC)were synthesized through a one-step solvothermal *** photocatalysts were characterized by X-ray diffraction,Raman spectroscopy,field-emission scanning electron microscopy,energy dispersive X-ray,transmission electron microscopy,UV-vis diffuse reflectance spectroscopy and photo luminescence *** La and Ce doping enhanced the visible light absorption ability of ZnLC and a red shift was detected for *** simulated solar light irradiation,the ZnO doped with 3 at%La and 1 at%Ce(ZnLC1)degrades methylene blue(MB)more effectively than those of pure ZnO,La-doped ZnO(ZnL)and commercially available *** improved photocatalytic performance of ZnLC1 can be attributed to the high charge separation efficiency as demonstrated by the photoluminescence ***,the photocatalytic experiments reveal that several parameters have their own impact on the MB *** a variety of radical scavengers,it is discovered that superoxide anion radical plays a crucial role in the degradation of *** ZnLC1 is also reused several times without noticeable decrease of photoactivity,indicating that it has a substantial potential for environmental remediation applications.

关键词： ZnO Lanthanum Cerium Co-doping Photodegradation Rare earths

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Predicting liver function after hemihepatectomy in patients with hepatocellular carcinoma using different modalities

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World Journal of Clinical Oncology 2024年第6期15卷 783-785页

作者： erfan Taherifard Anwaar Saeed Department of Medicine University of Pittsburgh Medical CenterPittsburghPA 15232United States UPMC Hillman Cancer Center University of Pittsburgh Medical CenterPittsburghPA 15232United States

In response to *** et al's study on prognostic factors for post-hemihep-atectomy outcomes in hepatocellular carcinoma(HCC)patients,this critical review identifies methodological limitations and proposes enhancements for future *** the study identifies liver stiffness measure and standard residual liver volume as potential predictors,concerns regarding small sample size,reliance on biochemical markers for safety assessment,and inadequate ad-justment for confounding variables are *** for rigorous methodology,including robust statistical analysis,consideration of confounding factors,and selection of outcome measures with clinical components,are proposed to strengthen prognostic ***,validation of novel evaluation models is crucial for enhancing clinical applicability and advancing understanding of postoperative outcomes in patients with HCC undergoing hem-ihepatectomy.

关键词： Hepatocellular carcinoma Liver cirrhosis Hepatectomy Liver failure Standard residual liver volume Liver stiffness

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Life-threatening constrictive pericarditis accompanied by synthetic cannabinoid use:A case report and literature review

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Journal of Acute Disease 2024年第3期13卷 116-120页

作者： Mahsa Behnemoon Razieh Omidvar Zeinab Sadat Fattah Jahromi Alireza Salmanipour erfan Kohansal Department of Cardiology School of MedicineUrmia University of Medical SciencesUrmiaIran Rajaie Cardiovascular Medical and Research Institute Iran University of Medical SciencesTehranIran

Rationale:Synthetic cannabinoids are increasingly used as recreational drugs and have been associated with adverse cardiovascular ***,reports of synthetic cannabinoids accompanied by constrictive pericarditis are ***’s concern:A 28-year-old male with a history of synthetic cannabinoid(Bonzai)abuse presented with chest discomfort,dyspnea,and lower extremity *** revealed reduced left ventricular ejection fraction,elevated inflammatory markers,low electrocardiogram voltages,and atrial ***:Chest spiral computerized tomography scan and chest X-ray demonstrated pericardial *** magnetic resonance imaging and right heart catheterization were done to confirm the possibility of constrictive *** on the patient’s addiction history and exclusion of rheumatologic and infectious causes,it was supposed that constrictive pericarditis and cardiomyopathy may be accompanied by synthetic cannabinoid ***:The patient received standard medical therapy,including loop diuretics for cardiomyopathy and constrictive *** ablation was recommended for his rhythm control,and he was planned for close monitoring of clinical and echocardiographic response and evaluation of the need for surgical pericardiectomy in the ***:After 6 months follow-up,echocardiographic exam revealed no significant improvement in ventricular ***,due to the high surgical risk,the patient’s poor compliance,and the continuation of drug abuse,he was not a good candidate for surgery according to our heart team’s ***:Synthetic cannabinoids can trigger constrictive pericarditis,and clinicians should consider them when evaluating patients with compatible symptoms and exposure *** research on the cardiovascular effects of synthetic cannabinoids is needed and public education on potential harms is warranted.

关键词： Bonzai Constrictive pericarditis Synthetic cannabinoids Cardiomyopathy Myocarditis

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Effects of Zr additions on structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti(wt.%) alloy

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China Foundry 2022年第1期19卷 9-16页

作者： Hamed Kamali erfan Kamali Massoud Emamy School of Metallurgy and Materials Engineering College of EngineeringUniversity of TehranP.O.Box 11155-4563TehranIran Faculty of Materials Engineering Sahand University of TechnologyP.O.Box 51335-1996TabrizIran

The effects of different Zr additions(0.05wt.%-0.5wt.%)on the structure and tensile properties of an Al-4.5Cu-0.3Mg-0.05Ti(wt.%)alloy solidified under a high cooling rate(18℃·s^(-1)),in as-cast and T6 heat-treated conditions were *** as-cast structure of the alloy consists of equiaxed grains ofα-Al with an average size of 64μm which is unaffected by the Zr additions,indicating the ineffectiveness of Zr in the grain refinement of the *** electron microscopy,along with X-ray diffraction analysis revealed the presence of elongatedθ-Al2Cu at the grain boundaries;in addition,coarse Al3Zr particles exist in the intergranular regions of the 0.5wt.%Zr-containing *** the T6 heat treatment,the elongatedθparticles were fragmented;however,the coarse Al3Zr particles remained unchanged in the ***,the formation of fineβ’-Al3Zr andθ’’-Al3Cu/θ’-Al2Cu phases during T6 heat treatment was revealed by transmission electron *** results of the tensile tests showed that the Zr additions increase the strength of the alloy in both as-cast and T6 heat-treated conditions,but reduce its elongation,especially with 0.5wt.%Zr *** 0.3wt.%Zr-added alloy in the T6 heat-treated condition has the highest quality index value(249 MPa).Fractography of the fracture surfaces of the alloys revealed ductile fracture mode including dimples and cracked intermetallic phases in both conditions.

关键词： Al-Cu-Mg alloys casting T6 heat treatment structure precipitation hardening tensile properties fractography

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A state-of-the-art review of the fabrication and characteristics of titanium and its alloys for biomedical applications

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Bio-Design and Manufacturing 2022年第2期5卷 371-395页

作者： Masoud Sarraf erfan Rezvani Ghomi Saeid Alipour Seeram Ramakrishna Nazatul Liana Sukiman Centre of Advanced Materials Department of Mechanical EngineeringFaculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Department of Materials Science and Engineering Sharif University of TechnologyAzadi Ave.P.O.Box 11365‑9466TehranIran Center for Nanotechnology and Sustainability Department of Mechanical EngineeringNational University of SingaporeSingapore 117581Singapore

Commercially pure titanium and titanium alloys have been among the most commonly used materials for biomedical applications since the 1950 *** to the excellent mechanical tribological properties,corrosion resistance,biocompatibility,and antibacterial properties of titanium,it is getting much attention as a biomaterial for ***,titanium promotes osseointegration without any additional adhesives by physically bonding with the living bone at the implant *** properties are crucial for producing high-strength metallic alloys for biomedical *** alloys are manufactured into the three types ofα,β,andα+β.The scientific and clinical understanding of titanium and its potential applications,especially in the biomedical field,are still in the early *** review aims to establish a credible platform for the current and future roles of titanium in *** first explore the developmental history of ***,we review the recent advancement of the utility of titanium in diverse biomedical areas,its functional properties,mechanisms of biocompatibility,host tissue responses,and various relevant antimicrobial *** research will be directed toward advanced manufacturing technologies,such as powder-based additive manufacturing,electron beam melting and laser melting deposition,as well as analyzing the effects of alloying elements on the biocompatibility,corrosion resistance,and mechanical properties of ***,the role of titania nanotubes in regenerative medicine and nanomedicine applications,such as localized drug delivery system,immunomodulatory agents,antibacterial agents,and hemocompatibility,is investigated,and the paper concludes with the future outlook of titanium alloys as biomaterials.

关键词： Titanium and titanium alloys Biomedical application Functional properties Biocompatibility Antibacterial activity Advanced manufacturing

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Circuit breakers in HVDC systems: state-of-the-art review and future trends

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Protection and Control of Modern Power Systems 2023年第3期8卷 16-31页

作者： erfan Taherzadeh Hamid Radmanesh Shahram Javadi G.B.Gharehpetian Department of Electrical Engineering Islamic Azad University Central Tehran BranchTehranIran Electrical Engineering Department Amirkabir University of Technology(Tehran Polytechnic)Tehran ***Iran

High voltage direct current(HVDC)systems are efficient solutions for the integration of large-scale renewable energy sources with the main power *** rapid development of the HVDC grid has resulted in a growing interest in DC circuit breakers(DCCBs).A fast and reliable circuit breaker is a necessary requirement in the development of large scale HVDC *** paper provides a comprehensive review and survey of the HVDC CBs and discusses potential research *** principles and the main features of various DCCBs are described and their merits and shortcomings are also highlighted.

关键词： DC circuit breakers(DCCBs) High voltage direct current(HVDC)system Multi-terminal HVDC(MT-HVDC) Fault current isolation Renewable energies Voltage clamping

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Bioactive 3D-printed chitosan-based scaffolds for personalized craniofacial bone tissue engineering

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再生工程(英文) 2023年第1期4卷 1-11页

作者： Satar Yousefiasl Esmaeel Sharifi erfan Salahinejad Pooyan Makvandi Soussan Irani School of Dentistry Hamadan University of Medical SciencesHamadan ***Iran Department of Tissue Engineering and Biomaterials School of Advanced Medical Sciences and TechnologiesHamadan University of Medical SciencesHamadanIran Faculty of Materials Science and Engineering K.N.Toosi University of TechnologyTehranIran Centre for Materials Interfaces Istituto Italiano di Tecnologiaviale Rinaldo Piaggio 34PontederaPisa 56025Italy Dental Research Centre Oral Pathology DepartmentDental FacultyHamadan University of Medical SciencesHamadanIran

Regeneration of craniofacial bone defects is a key issue in the bone regeneration ***,novel treatment strategies,such as tissue engineering using porous scaffolds,have been *** ideal tissue-engineered scaffold for bone tissue regeneration should possess pores to facilitate nutrients transmission and support repar-ative tissue ingrowth,bioactivity for osteoconduction and osseointegration,and biocompatibility to improve cell attachment,proliferation,and extracellular matrix *** the present study,we manufactured chitosan-based hydrogels substituted with alginate with optimized properties by extrusion-based three-dimensional(3D)printing.3D printing of the scaffolds enables the designing and developing of complex architectures for cranio-facial reconstruction using computer-aided design(CAD).Different ratios(2.5,5,and 10%)of hydroxyapatite were added to the hydrogel,printed,and subsequently lyophilized to augment the physical and biological char-acteristics of the *** incorporation into the chitosan-based scaffolds increased the porosity and pore size of the printed *** addition,the presence of hydroxyapatite amplified apatite formation and decreased the size of formed apatite *** the scaffold samples showed biocompatible properties and did not have toxicity toward rat bone marrow mesenchymal stem ***,the scaffolds containing 5%w/w hydroxyapatite exhibited significant growth in cell viability compared to the ***,it is concluded that chitosan-based scaffolds adorned with hydroxyapatite are considerable for regenerating craniofacial bone defects.

关键词： Bioactivity CAD/CAM Maxillofacial reconstruction Pore Stem cells

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