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Petroleum Science 2024年第2期21卷 951-961页

作者： Amir Mohammad Zamani Ashkan Moslemi kamran hassani Department of Petroleum Engineering Islamic Azad University Science and Research BranchTehranIran Institute of Petroleum Engineering University of TehranTehranIran

This paper aims to investigate the tragacanth gum potential as a natural polymer combined with natural clay mineral(montmorillonite,kaolinite,and illite)nanoparticles(NPs)to form NP-polymer suspension for enhanced oil recovery(EOR)in carbonate *** gravimetric analysis(TGA)tests were conducted initially in order to evaluate the properties of tragacanth ***,scanning electron microscopy(SEM)and energy-dispersive X-ray(EDX)tests were used to detect the structure of clay *** various scenarios,the effects of natural NPs and polymer on the wettability alteration,interfacial tension(IFT)reduction,viscosity improvement,and oil recovery were investigated through contact angle system,ring method,Anton Paar viscometer,and core flooding tests,*** entire experiment was conducted at 25,50,and 75℃,*** to the experimental results,the clay minerals alone did not have a significant effect on viscosity,but the addition of minerals to the polymer solution leads to the viscosity enhancement remarkably,resulting mobility ratio *** clay NPs,the combination of natural polymer and kaolinite results in increased viscosity at all *** wettability alteration was also observed in the case of natural polymer and illite *** in combination with natural polymer showed an ability in reducing ***,the results of displacement experiments revealed that the combination of natural polymer and kaolinite could be the best option for EOR due to its substantial ability to improve the recovery factor.

关键词： Chemical flooding Tragacanth gum Clay nanoparticle Wettability IFT

The role of the fiber ply configurations on the biomechanics of the hip prosthesis

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第3期13卷 149-160页

作者： kamran hassani Mohammad Nikkhoo Alireza Karimi Department of Biomedical Engineering Science and Research Branch Islamic Azad University TehranIran Department of Ophthalmology and Visual Sciences University of Alabama at Birmingham Birmingham ALUSA

The total hip replacement is the only approved procedure for restoring a degenerated hip joint through *** life span of a prosthesis could depend on the geometry and material properties of the *** study aims to analyze the biomechanics of the carbon/polyetheretherketone(PEEK)composite prosthesis having three different fiber ply configurations compared to traditional stainless steel(SS)*** implant-bone system was established and subjected to a load from the head of the femur and abductor muscle *** stresses and strains in the implant-bone systems were calculated and *** results revealed lower stresses and strains in composite prostheses compared to SS *** fiber ply orientation of the carbon/PEEK composite prosthesis is shown to be a key asset in stress and strain distribution of the 13 implant-bone *** fiber plies which orientated multidirectionally with−45 and+45 degrees exhibited uniform stress and strain *** results suggested the advantage of using composite prostheses in implant designs as they not only invoke lower stresses and strains in the implant-bone system but also amplify the life span of implants in the body.

关键词： Prosthesis hip joint composite stress strain finite element

A numerical analysis on different-generation prototypes of ventricular assist device

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International Journal of Modeling, Simulation, and Scientific Computing 2019年第5期10卷 34-42页

作者： Ali Tavakoli Golpaygani kamran hassani Alireza Karimi Amin Nokhbe Zaeim Department of Biomedical Engineering Standard Research Institute KarajIran Department of Biomechanics Science and Research Branch Islamic Azad UniversityTehranIran Department of Mechanical Engineering Kyushu University 744 MotookaNishi-kuFukuoka 819-0395Japan

The ventricular assist device(VAD)assists the patients with heart diseases for limited and prolonged *** device synchronizes with normal heart activities to help foster its ***,its sensitive design requires high *** pumps are the essential part of every VAD which should operate in wide ranges of flow and *** there are various types of VAD under different designs,it is neither practical nor plausible to experimentally/clinically investigate their ***,in the concurrent study,a numerical study was carried out on four different generation prototypes of VAD pumps for reaching an optimum *** computational fluid dynamics(CFD)method,the software derived,showed and streamlined the flow field shear stress both inside the VAD and its ***,the vortices and flow rate-pressure curves were *** results showed that the curved blade pumps operate better compared to that of the straight blade types,concerning the provision of enough pressure and less damage to the red blood *** results have implications not only for comparing different types of VAD designs but also for understanding the resulted shear stresses and pressures as a result of the blade’s structure.

关键词： Pump generation CFD ventricular assist device numerical simulation ventricular blade

Detection and identification of S1 and S2 heart sounds using wavelet decomposition method

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International Journal of Biomathematics 2015年第6期8卷 141-155页

作者： Ali Tavakoli Golpaygani Nahid Abolpour kamran hassani D. John Doyle Biomedical Engineering DepartmentFaculty of Electrical Mechanical and Construction Engineering Standard Research Institute Karaj Iran Department of Physics and Biomedical EngineeringShiraz University of Medical Sciences Shiraz Iran Department of Biomechanics Science and Research Branch Islamic Azad University Tehran Iran Department of General AnesthesiologyAnesthesiology Institute Cleveland Clinic Abu Dhabi Abu Dhabi UAE

Phonocardiogram （PCG）, the digital recording of heart sounds is becoming increasingly popular as a primary detection system for diagnosing heart disorders and it is relatively inexpensive. Electrocardiogram （ECG） is used during the PCG in order to identify the systolic and diastolic parts manually. In this study a heart sound segmentation algorithm has been developed which separates the heart sound signal into these parts automa- tically. This study was carried out on 100 patients with normal and abnormal heart sounds. The algorithm uses discrete wavelet decomposition and reconstruction to pro- duce PCG intensity envelopes and separates that into four parts： the first heart sound, the systolic period, the second heart sound and the diastolic period. The performance of the algorithm has been evaluated using 14,000 cardiac periods from 100 digital PCG recordings, including normal and abnormal heart sounds. In tests, the algorithm was over93% correct in detecting the first and second heart sounds. The presented automatic seg- mentation Mgorithm using w^velet decomposition and reconstruction to select suitable frequency band for envelope calculations has been found to be effective to segment PCG signals into four parts without using an ECG.

关键词： Phonocardiography auscultation murmurs wavelet decomposition waveletreconstruction segmentation.

Drill bit wear monitoring and failure prediction for mining automation

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International Journal of Mining Science and Technology 2023年第3期33卷 289-296页

作者： Hamed Rafezi Ferri hassani Department of Mining and Materials Engineering McGill UniversityMontreal H3A 0G4Canada

This article introduces a novel approach for tricone bit wear condition monitoring and failure prediction for surface mining applications.A successful bit health monitoring system is essential to achieve fully autonomous blasthole *** this research in-situ vibration signals were analyzed in timefrequency domain and signals trend during tricone bit life span were investigated and introduced to support the development of artificial intelligence(AI)*** addition to the signal statistical features,wavelet packet energy distribution proved to be a powerful indicator for bit wear *** artificial neural network(ANN)models were designed,trained and evaluated for bit state ***,an ANN architecture and feature vector were introduced to classify the bit condition and predict the bit failure.

关键词： Drilling vibration Condition monitoring Failure prediction Bit wear Wavelet energy Mining automation

Drilling signals analysis for tricone bit condition monitoring

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International Journal of Mining Science and Technology 2021年第2期31卷 187-195页

作者： Hamed Rafezi Ferri hassani Department of Mining and Materials Engineering McGill UniversityMontreal H3A 0G4Canada

This paper presents a novel approach to investigate the relations between drilling signals and bit wear condition in real world full-scale mining *** research addresses the increasing demand for automation in mining to increase the efficiency,safety,and ability to work in harsh environments.A crucial issue in fully autonomous unmanned drilling is to have a system to detect the bit wear condition through the drilling signals analysis in real *** this work,based on extensive field studies,a novel qualitative method for tricone bit wear state classification is developed and *** relations between drilling vibration as well as electric motor current signals and bit wear are investigated and bit failure vibration frequencies,regardless of the geological conditions,are *** failure frequencies are experimentally investigated and analytically ***,the effect of bit design parameters on the failure frequencies is presented for the application of bit wear condition monitoring and bit failure prediction.

关键词： Drilling Tricone bit Vibration Wear Condition monitoring Failure prediction

SINGULAR SPECTRUM ANALYSIS:METHODOLOGY AND APPLICATION TO ECONOMICS DATA

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Journal of Systems Science & Complexity 2009年第3期22卷 372-394页

作者： Hossein hassani Anatoly ZHIGLJAVSKY Institute for Trade Studies and Research (ITSR) Centre for Optimisation and Its Applications School of Mathematics Centre for Optimization and Its Applications School of Mathematics

This paper describes the methodology of singular spectrum analysis (SSA) and demonstratethat it is a powerful method of time series analysis and forecasting,particulary for economic time *** authors consider the application of SSA to the analysis and forecasting of the Iranian nationalaccounts data as provided by the Central Bank of the Islamic Republic of Iran.

关键词： Economic time series forecasting Iranian national accounts SSA.

Fabrication and Growth Mechanism of Single-crystalline Rutile TiO_2 Nanowires by Liquid-phase Deposition Process in a Porous Alumina Template

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Journal of Materials Science & Technology 2015年第8期31卷 828-833页

作者： Abbas Sadeghzadeh Attar Zahra hassani Department of Metallurgy and Materials Engineering University of Kashan Department of Materials Institute of Science and High Technology and Environmental SciencesGraduate University of Advanced Technology

TiO2 nanowire arrays were successfully fabricated by liquid-phase deposition method using porous alumina templates. The obtained TiO2 nanowires were characterized using Raman spectroscopy, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, field emission scanning electron microscopy （FE- SEM）, transmission electron microscopy （TEM）, and selected area electron diffraction （SAED） analysis. Results of electron microscopic observations indicated that the nanowires were smooth and uniform with a diameter of about 50-80 nm and several micrometers in length. SAED, Raman, and XRD mea- surements showed that TiO2 nanowires were single-crystalline with a pure rutile structure after heating at 800 ~C for 10 h. In this situation, the nanowire constituents grew preferentially along the 〈001〉 direction. Furthermore, the formation process and mechanistic study of the Ti02 nanowire arrays were proposed and discussed in detail. The nanowires are clearly produced by the deposition of TiO2 particles on the inner wall of the template nanochannels.

关键词： TiO2 nanowire arrays Single crystal Rutile phase Liquid-phase deposition process

Iterative Selection of GOB Poles in the Context of System Modeling

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International Journal of Automation and computing 2019年第1期16卷 102-111页

作者： Anis Khouaja hassani Messaoud High Institute of Applied Science and Technology National Engineering School of Monastir (ENIM)

This paper is concerned with the problem of system identification using expansions on generalized orthonormal bases(GOB). Three algorithms are proposed to optimize the poles of such a basis. The first two algorithms determine a GOB with optimal real poles while the third one determines a GOB with optimal real and complex poles. These algorithms are based on the estimation of the dominant mode associated with a residual signal obtained by iteratively filtering the output of the process to be modelled. These algorithms are iterative and based on the quadratic error between the linear process output and the GOB based model output. They present the advantage to be very simple to implement. No numerical optimization technique is needed, and in consequence there is no problem of local minima as is the case for other algorithms in the literature. The convergence of the proposed algorithms is proved by demonstrating that the modeling quadratic error between the process output and the GOB based model is decreasing at each iteration of the algorithm. The performance of the proposed pole selection algorithms are based on the quadratic error criteria and illustrated by means of simulation results.

关键词： Generalized orthonormal bases(GOB) Laguerre functions Kautz functions pole estimation modelling identification

Advanced development in upstream of petroleum industry using nanotechnology

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1483-1491页

作者： Sedigheh Sadegh hassani Maryam Daraee Zahra Sobat Catalysis research Division Research Institute of Petroleum Industry(RIPI)West Entrance Blvd.Olympic VillageP.O.Box 14857-33111TehranIran Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)West Entrance Blvd.Olympic VillageP.O.Box 14857-33111TehranIran

Nowadays,energy supply is one of the most important issues due to limitation of oil,gas and coal *** of rapid population,civilization and energy consumption growth,the improved technologies to make optimal use of the sources,solving related problems and finding new energy sources are *** than 10 years ago,nanotechnology as one of the most important technologies has also been applied to progress in the oil and gas industry(upstream,midstream and downstream).The experience of these years has shown that application of nanotechnology in the oil industry improves the exploration of crude oil and natural gas(underground or deep water),drilling and bringing the crude oil or raw natural gas to the surface,as well as transportation,storage,processing and purifying *** with high specific surface area,pore volume and small size show unique physical and chemical properties,which could be applied in several *** this regard,many researchers have been focused on various nanoparticles for upstream industries and studied their potential in oil exploration,drilling,production and enhanced oil recovery(EOR).Also,in downstream and midstream which involve refining of crude oil,processing and purifying of raw natural gas,transportation and storage of crude or refined petroleum products,the nanomaterials have been used to improve the quality of oil and make it appropriate for the *** sulfur gasoline,enhancing the octane number and coating the transportation system are among the goals that have been achieved successfully using *** this work,various types of nanoparticles such as metallic,metal oxide,hybrid nanoparticles,carbon nanomaterials,nano-composites and their applications in oil upstream industry are ***,their usage in different types of oil upstream processes is discussed.

关键词： Nanotechnology Oil exploration Oil drilling Nanoparticles Enhanced oil recovery