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Application of adaptive neuro-fuzzy inference system and data mining approach to predict lost circulation using DOE technique (case study: Maroon oilfield)

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Petroleum 2020年第4期6卷 423-437页

作者： Farough Agin Rasool Khosravanian Mohsen Karimifard amirhosein jahanshahi Department of Petroleum Engineering Amirkabir University of Technology(Tehran Polytechnic)424 Hafez AvenueTehran15875-4413Iran Research Institute of Petroleum Industry(RIPI) West Blvd.Near Azadi Sports ComplexTehran14857-33111Iran Department of Petroleum Engineering Petroleum University of TechnologyAhwazIran School of Mining Engineering College of EngineeringUniversity of Tehran14174-66191TehranIran

Lost circulation is the most common problem encountered while drilling oil *** of such a problem can cause a lot of time and cost *** order to drill oil wells,a fast and profitable way is necessary to predict and solve lost circulation *** system is a method used lately for problems that deal with *** this paper,three approaches are carried out for prediction of lost circulation *** approaches include design of experiments(DOE),data mining,and adaptive neuro-fuzzy inference system(ANFIS).Data of 61 wells of Maroon oilfield are selected and sorted as the feed of the *** variables are used as inputs of the approaches and one variable is used as the ***,DOE is conducted to observe the effects of ***-Burman method is used to determine the effects of variables on lost *** that,data mining is conducted to predict the amount of lost *** class of regression is used to determine a function to model the data and the error of the ***,ANFIS is applied to predict the amount of lost *** chosen data are used in order to train,test,and control the ***,subtractive clustering is used to train the fuzzy inference system(FIS)of the *** performance of the ANFIS model is assessed through the root mean squared error(RMSE).The results suggest that ANFIS method can be successfully applied to establish lost circulation prediction *** addition,results of ANFIS and data mining are investigated through their prediction *** comparison of both methods reveals that ANFIS error is much lower than data mining.

关键词： Lost circulation Maroon oilfield ANFIS RMSE Expert system

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A novel mitigation measure for normal fault-induced deformations on pile-raft systems

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 15-33页

作者： Mohammadreza jahanshahi Nowkandeh Mehdi Ashtiani Faculty of Civil Engineering Babol Noshirvani University of TechnologyBabolIran

Evidence from recent earthquakes has shown destructive consequences of fault-induced permanent ground movement on *** observations have increased the demand for improvements in the design of structures that are dramatically vulnerable to surface fault *** this study a novel connection between the raft and the piles is proposed to mitigate the hazards associated with a normal fault on pile-raft systems by means of 3D finite element(FE)*** embarking on the parametric study,the strain-softening constitutive law used for numerical modeling of the sand has been validated against centrifuge test *** exact location of the fix-head and unconnected pile-raft systems relative to the outcropping fault rupture in the free-field is parametrically investigated,revealing different failure *** performance of the proposed connection for protecting the pile-raft system against normal fault-induced deformations is assessed by comparing the geotechnical and structural responses of both types of *** results indicate that the pocket connection can relatively reduce the cap rotation and horizontal and vertical displacements of the raft in most *** proposed connection decreases the bending moment response of the piles to their bending moment capacity,verging on a fault offset of 0.6 m at bedrock.

关键词： normal fault rupture failure mechanism pile-raft system pocket connection finite element modeling

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Fusion of color and hallucinated depth features for enhanced multimodal deep learning-based damage segmentation

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Earthquake Engineering and Engineering Vibration 2023年第1期22卷 55-68页

作者： Tarutal Ghosh Mondal Mohammad Reza jahanshahi Civil Architectural and Environmental EngineeringMissouri University of Science and TechnologyRollaMOUSA Lyles School of Civil Engineering Purdue UniversityWest LafayetteINUSA School of Electrical and Computer Engineering Purdue UniversityWest LafayetteINUSA

Recent advances in computer vision and deep learning have shown that the fusion of depth information can significantly enhance the performance of RGB-based damage detection and segmentation ***,alongside the advantages,depth-sensing also presents many practical *** instance,the depth sensors impose an additional payload burden on the robotic inspection platforms limiting the operation time and increasing the inspection ***,some lidar-based depth sensors have poor outdoor performance due to sunlight contamination during the *** this context,this study investigates the feasibility of abolishing depth-sensing at test time without compromising the segmentation *** autonomous damage segmentation framework is developed,based on recent advancements in vision-based multi-modal sensing such as modality hallucination(MH)and monocular depth estimation(MDE),which require depth data only during the model *** the time of deployment,depth data becomes expendable as it can be simulated from the corresponding RGB *** makes it possible to reap the benefits of depth fusion without any depth perception per *** study explored two different depth encoding techniques and three different fusion strategies in addition to a baseline RGB-based *** proposed approach is validated on computer-generated RGB-D data of reinforced concrete buildings subjected to seismic *** was observed that the surrogate techniques can increase the segmentation IoU by up to 20.1%with a negligible increase in the computation ***,this study is believed to make a positive contribution to enhancing the resilience of critical civil infrastructure.

关键词： multimodal data fusion depth sensing vision-based inspection UAV-assisted inspection damage segmentation post-disaster reconnaissance modality hallucination monocular depth estimation

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Fouling of WO3 nanoparticle-incorporated PSf membranes in ultrafiltration of landfill leachate and dairy a combined wastewaters： An investigation using model

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Chinese Journal of Chemical Engineering 2017年第6期25卷 741-751页

作者： Majid Peyravi Mohsen jahanshahi Soodabeh Khalili Nanoenvironment Research Group Nanotechnology Institute Faculty of Chemical Engineering Babol Noshirvani University of Technolog~ Babol lran

As fouling has always been a major drawback of membrane technology, qualitative and quantitative understanding of membrane fouling mechanisms therefore becomes vital in order to help push membrane separation technologies forward. In this study, firstly, self-cleaning Polysulfone(PSf) membranes were synthesized by incorporation of WO_3nanoparticles(0–2 wt%) and subsequent UV irradiation for efficient ultrafiltration(UF)of landfill leachate and dairy wastewater. The membrane surface properties were characterized by scanning electron microscopy(SEM) and contact angle analysis. It was found that UV-irradiated membranes exhibited higher percent COD removals due to the hydrophilicity and photocatalytic properties of nano-WO_3. Subsequently, in order to analyze the fouling behavior of the membranes, a set of experimental data from cross-flow ultrafiltration of municipal landfill leachate and industrial dairy wastewater at 25 °C was obtained. A new model of membrane fouling was proposed based on a resistance in series concept and was fitted well with all experimental data *** all relative errors of prediction provided by the proposed model were less than 2.5%. In addition, it was revealed that this newly-developed model exhibited smooth transition between the common successive twostep pore blockage-cake filtration phenomena and thus eliminates the need to use separate equations for different mechanisms.

关键词： Fouling model Leachate wastewater Ultrafiltration Whey wastewater Chemical oxygen demand

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Surface modification of broom sorghum-based activated carbon via functionalization with triethylenetetramine and urea for CO2 capture enhancement

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Frontiers of Chemical Science and Engineering 2017年第2期11卷 252-265页

作者： Elaheh Mehrvarz Ali A. Ghoreyshi Mohsen jahanshahi Chemical Engineering Department Babol University of Technology Shariati Av. Babol Mazandaran 47148-71167 Iran

A new type of activated carbon （AC） was synthesized using broom sorghum stalk as a low cost carbon source through chemical activation with H3PO4 and KOH. The AC obtained by KOH had the largest BET surface area of 1619 m^2·g^-1 and the highest micropore volume of 0.671 cm^3·g^-1. CO2 adsorption was enhanced by functionalizing the AC with two different amines： triethylenetetramine （TETA） and urea. The structure of the prepared ACs was characterized by Brunauer-Emmett-Teller method, scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and acid-base Boehm titration analyses. The adsorption behavior of CO2 onto raw and amine-functionalized ACs was investigated in the temperature range of 288-308 K and pressures up to 25 bar. The amount of CO2 uptake at 298 K and 1 bar achieved by AC-TETA and AC-urea was 3.22 and 2.33 mmol·g^-1 which shows a 92% and 40% improvement compared to pristine AC （1.66 mmol·g^-1）, respectively. Among different model isotherms used to describe the adsorption equilibria, Sips isotherm presented a perfect fit in all cases. Gas adsorption kinetic study revealed a fast kinetics of CO2 adsorption onto the ACs. The evaluation of the isosteric heat of adsorption demonstrated the exothermic nature of the CO2 adsorption onto unmodified and modified samples.

关键词： activated carbon broom sorghum functionalization CO2 capture

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MULTIPLICATION OPERATORS ON INVARIANT SUBSPACES OF FUNCTION SPACES

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Acta Mathematica Scientia 2013年第5期33卷 1463-1470页

作者： B.YOUSEFI Sh.KHOSHDEL Y.jahanshahi Department of Mathematics Payame Noor University

Let Mφ be the operator of multiplication by φ on a Hilbert space of functions analytic on the open unit disk. For an invariant subspace F for the multiplication operator Mz, we derive some spectral properties of the multiplication operator Mφ ： F→F. We characterize norm, spectrum, essential norm and essential spectrum of such operators when F has the codimension n property with n∈{1,2,...,＋∞}.

关键词： invariant subspace Hilbert space of analytic functions essential spectrum essential norm Fredholm operator multiplication operator

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Simulation of particles settling in power-law fluids by combined lattice Boltzmann-smoothed profile methods

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International Journal of Sediment Research 2021年第5期36卷 637-655页

作者： Hamideh Rouhani Tazangi Ataallah Soltani Goharrizi Ebrahim jahanshahi Javaran Department of Chemical Engineering Shahid Bahonar University of Kerman Department of Mechanical Engineering Shahid Bahonar University of Kerman

In the current study, the settling, interaction, drafting, kissing, and tumbling of two identical and nonidentical circular particles were simulated in a two-dimensional box in shear-thinning, Newtonian,and shear-thickening fluids by using the combined lattice Boltzmann-smoothed profile ***, the drag coefficient of one particle settling for different power-law indexes and Archimedes numbers was calculated. Also, the effect of the diameter ratio of the two particle pairs was considered during settling. The developed method was validated by simulating the settling of one particle and two identical particles in a Newtonian fluid. To consider two non-identical particles, two cases were examined. In Case A, the larger particle was above the smaller one and in the Case B, the smaller particle was above the larger one. The results showed that the two non-identical particles were separated more easily than the identical ones. In the settling of two particles under the same Archimedes number, the drafting and kissing time considerably increased by changing the non-Newtonian fluid behavior from a shearthinning one to a shear-thickening one. Also, when the larger particle was above the smaller one, the time duration of the kissing stage increased with the decrease in the diameter ratio.

关键词： Lattice Boltzmann method Smoothed profile method DKT phenomenon Power-law fluids Particulate flow Drag coefficient

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Deep brain stimulation for psychiatric disorders: roleof imaging in identifying/confirming DBS targets,predicting, and optimizing outcome and unravellingmechanisms of action

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Psychoradiology 2021年第3期1卷 118-151页

作者： Dejan Georgiev Harith Akram Marjan jahanshahi Department of Clinical and Movement Neurosciences UCL Queen Square Institute of NeurologyQueen SquareLondonWC1N 3BGUK Department of Neurology University Medical Centre LjubljanaZaloska cesta 21000 LjubljanaSlovenia Artificial Intelligence Laboratory Faculty of Computer and Information ScienceUniversity of LjubljanaVecna pot 1131000 LjubljanaSlovenia The Clinical Hospital of Chengdu Brain Science Institute MOE Key Laboratory for NeuroinformationUniversity of Electronic Science and Technology of ChinaChengdu611731China

Following the established application of deep brain stimulation(DBS)in the treatment of movement disorders,new non-neurological indications have emerged,such as for obsessive–compulsive disorders,major depressive disorder,dementia,Gilles de la Tourette Syndrome,anorexia nervosa,and *** DBS is a network mod-ulation surgical treatment,the development of DBS for both neurological and psychiatric disorders has been partly driven by advances in neuroimaging,which has helped explain the brain networks *** in magnetic resonance imaging connectivity and electrophysiology have led to the development of the con-cept of modulating widely distributed,complex brain ***,the increasing number of targets for treating psychiatric disorders have indicated that there may be a convergence of the effect of stimulating dif-ferent targets for the same disorder,and the effect of stimulating the same target for different *** aim of this paper is to review the imaging studies of DBS for psychiatric ***,and particularly connectivity analysis,offers exceptional opportunities to better understand and even predict the clinical out-comes of DBS,especially where there is a lack of objective biomarkers that are essential to properly guide DBS pre-and *** future,imaging might also prove useful to individualize DBS ***,one of the most important aspects of imaging in DBS is that it allows us to better understand the brain through observing the changes of the functional connectome under neuromodulation,which may in turn help explain the mechanisms of action of DBS that remain elusive.

关键词： deep brain stimulation psychiatric disorders major depressive disorder obsessive–compulsive disorder dementia

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A Novel Vision of Reinforcing Nanofibrous Masks with Metal Nanoparticles:Antiviral Mechanisms Investigation

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Advanced Fiber Materials 2023年第4期5卷 1273-1317页

作者： Farinaz Hadinejad Hamed Morad Mohsen jahanshahi Ali Zarrabi Hamidreza Pazoki‑Toroudi Ebrahim Mostafavi Nanotechnology Research Institute Faculty of Chemical EngineeringBabol Noushirvani University of TechnologyBabol ***Iran Department of Pharmaceutics and Pharmaceutical Nanotechnology School of PharmacyIran University of Medical SciencesTehran ***Iran Ramsar Campus Mazandaran University of Medical SciencesRamsar ***Iran Department of Biomedical Engineering Faculty of Engineering and Natural SciencesIstinye UniversityIstanbul 34396Turkey Physiology Research Center Faculty of MedicineIran University of Medical SciencesTehran ***Iran Department of Physiology Faculty of MedicineIran University of Medical SciencesTehran ***Iran Stanford Cardiovascular Institute Stanford University School of MedicineStanfordCA 94305USA Department of Medicine Stanford University School of MedicineStanfordCA 94305USA

Prevention of spreading viral respiratory disease,especially in case of a pandemic such as coronavirus disease of 2019(COVID-19),has been proved impossible without considering obligatory face mask-wearing protocols for both healthy and contaminated *** widespread application of face masks for long hours and almost everywhere increases the risks of bacterial growth in the warm and humid environment inside the *** the other hand,in the absence of antiviral agents on the surface of the mask,the virus may have a chance to stay alive and be carried to different places or even put the wearers at risk of contamination when touching or disposing the *** this article,the antiviral activity and mechanism of action of some of the potent metal and metal oxide nanoparticles in the role of promising virucidal agents have been reviewed,and incorporation of them in an electrospun nanofibrous structure has been considered an applicable method for the fabrication of innovative respiratory protecting materials with upgraded safety levels.

关键词： Nanoshield Facemask Antiviral Metal nanoparticles Electrospinning Immunity booster

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Nonsingular Terminal Sliding Mode Control With Ultra-Local Model and Single Input Interval Type-2 Fuzzy Logic Control for Pitch Control of Wind Turbines

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IEEE/CAA Journal of Automatica Sinica 2021年第3期8卷 690-700页

作者： Saber Abrazeh Ahmad Parvaresh Saeid-Reza Mohseni Meisam jahanshahi Zeitouni Meysam Gheisarnejad Mohammad Hassan Khooban Department of Electrical and Electronics Engineering Shiraz UniversityShiraz ***Iran Department of Electrical Engineering Shahid Bahonar University of KermanKerman 76169-14111Iran Sharif University of Technology Tehran ***Iran Shiraz University of Technology Shiraz ***Iran Department of Electrical Engineering Najafabad BranchIslamic Azad UniversityIsfahan ***Iran Department of Electrical and Computer Engineering Aarhus University8200 AarhusDenmark

As wind energy is becoming one of the fastestgrowing renewable energy resources,controlling large-scale wind turbines remains a challenging task due to its system model nonlinearities and high external *** main goal of the current work is to propose an intelligent control of the wind turbine system without the need for model *** this purpose,a novel model-independent nonsingular terminal slidingmode control(MINTSMC)using the basic principles of the ultralocal model(ULM)and combined with the single input interval type-2 fuzzy logic control(SIT2-FLC)is developed for non-linear wind turbine pitch angle *** the suggested control framework,the MINTSMC scheme is designed to regulate the wind turbine speed rotor,and a sliding-mode(SM)observer is adopted to estimate the unknown phenomena of the *** auxiliary SIT2-FLC is added in the model-independent control structure to improve the rotor speed regulation and compensate for the SM observation estimation *** examinations and comparative analyses were made using a real-time softwarein-the-loop(RT-SiL)based on the dSPACE 1202 board to appraise the efficiency and applicability of the suggested modelindependent scheme in a real-time testbed.

关键词： Interval type-2(IT2)fuzzy logic control modelindependent nonsingular terminal sliding-mode control(MINTSMC) pitch angle control real-time software-in-the-loop(RT-SiL)

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