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Identification of electrocardiogram signals using internet of things based on combinatory classification

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第3期8卷 241-260页

作者： Marzieh Faridi Masouleh mohammad ali Afshar kazemi Mahmood Alborzi Abbas Toloie Eshlaghy Information Technology Management Department Science and Research Branch Islamic Azad University Tehran Iran Information Technology Management Department Central Branch Islamic Azad University TehranIran

Combination of computer sciences and electronics has resulted in one of the most remarkable technologies of the recent years called internet of things,considered as a challenge in electronic health systems for taking care of *** of things presents a promising paradigm for management of digital identification in the form of service *** effect of internet of things on healthcare is still in its preliminary stages and requires a substantial *** equipment and services are developed and utilized for health systems by providing different things to establish communication and information provision to users at any conditions or *** this paper,attempts have been made to detect electrocardiogram(ECG)signal through a wireless simple sensing network of body using internet of things operating based on classification and feature extraction.

关键词： Body wireless sensing system classification electronic health system feature extraction internet of things

Correlation of semi-quantitative findings of endolymphatic hydrops in MRI with the audiometric findings in patients with Meniere's disease

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Journal of Otology 2022年第3期17卷 123-129页

作者： mohammad ali kazemi ali Ghasemi Jan W.Casselman mohammad Shafiei Masoud Motasaddi Zarandy Hashem Sharifian Hassan Hashemi Kavous Firouznia Behnaz Moradi Kianosh Kasani Azin Etemadimanesh Department of Radiology Amiralam HospitalTehran University of Medical SciencesTehranIran Department of Radiology Advanced Diagnostic and Interventional Radiology Research Center(ADIR)Medical Imaging CenterImam Khomeini Hospital ComplexTehran University of Medical SciencesTehranIran Faculty of Medicine Tehran University of Medical SciencesTehranIran Department of Radiology AZ St.Jan Brugge-Oostende avCampus BruggeRuddershove 10B-8000BruggeBelgium University Ghent GentBelgium Department of Radiology AZ St.AugustinusOosterveldlaan 24B-2610AntwerpenBelgium Otorhinolaryngology Research Center Tehran University of Medical SciencesTehranIran Department of Otorhinolaryngology Amiralam HospitalTehran University of Medical SciencesTehranIran Department of Radiology Yas Complex HospitalTehran University of Medical SciencesTehranIran Bachelor of Radiology Rajaie Cardiovascular Medical and Research CenterIran University of Medical SciencesTehranIran

Purpose:To investigate the correlation between vestibular hydrops(VH),cochlearhydrops(CH),vestibular aqueduct non-visibility(VANV),and visually increased perilymphatic enhancement(VIPE)with the findings of pure-tone audiometry(PTA)in Meniere’s disease(MD)***:In this cross-sectional study,53 ears belonging to 48 patients were divided into two groups and *** group“MD patients,”there were 24 ears of 19 patients diagnosed with the definite MD(14 patients with unilateral and 5 patients withbilateral involvements).The“control group”consisted of 29 non-symptomatic ears belonging to patients diagnosed with unilateral sudden sensory-neural hearing loss or unilateral *** the patients underwent 2 sessions of temporal bone MRI using the same 3T system:an unenhanced axial T1,T2,and 3D-FLAIR MRI,an intravenous gadoliniumenhanced axial T1 fat-sat,and 4 h after the injection,an axial 3D-T2 cube and 3D-FLAIR ***,CH,VANV,and VIPE were ***,the correlation between EH indices and PTA findings(in three frequency domains of low,middle,and high)were evaluated,and the predictive value of MRI was ***:VH was significantly correlated with the hearing threshold in the low,middle,and highfrequency *** was also correlated with the hearing threshold in the low and middle ***,VIPE was not associated with hearing thresholds,and VANV was only correlated with the hearing threshold in low ***:The grade of VH,CH,and VANV were significantly correlated with the hearing thresholds in PTA.

关键词： Magnetic resonance imaging Meniere disease Endolymphatic hydrops Pure-tone audiometry

Moisture-Induced Non-Equilibrium Phase Segregation in Triple Cation Mixed Halide Perovskite Monitored by In Situ Characterization Techniques and Solid-State NMR

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Energy & Environmental Materials 2023年第2期6卷 185-194页

作者： mohammad ali Akhavan kazemi Nicolas Folastre Parth Raval Michel Sliwa Jean Marie Vianney Nsanzimana Sema Golonu Arnaud Demortiere Jean Rousset Olivier Lafon Laurent Delevoye G.N.Manjunatha Reddy Frédéric Sauvage Laboratoire de Réactivité et Chimie des Solides(LRCS) UMR CNRS 7314-Institut de Chimie de Picardie FR 3085Université de Picardie Jules Verne33 rue Saint LeuAmiens Cedex FR-80039France CNRS Centrale LilleUMR 8181UCCSUnitéde Catalyse et Chimie du SolideUniversité de LilleUniversitéd’ArtoisLille F-59000France UMR 8516-LASIRE-Laboratoire de Spectroscopie pour les Interactions la Réactivité et l’EnvironnementCNRSUniversitéde LilleLille F-59000France EDF R&D EDF LabBoulevard Gaspard MongePalaiseau 91120France

Environmental stability is a major bottleneck of perovskite solar *** a handful of studies are investigating the effect of moisture on the structural degradation of the *** mostly rely on ex situ experiments and on completely degraded samples,which restrict the assessment on initial and final *** combining in situ X-ray diffraction under controlled 85%relative humidity,and live observations of the water-induced degradation using liquid-cell transmission electron microscopy,we reveal two competitive degradation paths leading on one hand to the decomposition of state-of-theart mixed cation/anion(Cs_(0.05)(MA_(0.17)FA_(0.83))_(0.95)Pb(Br_(0.17)I_(0.83))_(3)(CsMAFA)into PbI_(2) through a dissolution/recrystallization mechanism and,on the other hand,to a non-equilibrium phase segregation leading to CsPb_(2)Br_(5) and a Cesium-poor/iodide-rich Cs_(0.05)-x(MA_(0.17)FA_(0.83))_(0.95)Pb(Br_(0.17-2y)I_(0.83)+2y)_(3) *** degradation mechanism is corroborated at atomic-scale resolution through solid-state ^(1)H and ^(133)Cs NMR *** to moisture leads to a film containing important heterogeneities in terms of morphology,photoluminescence intensities,and *** results provide new insights and consensus that complex perovskite compositions,though very performant as champion devices,are comparatively metastable,a trait that limits the chances to achieve long-term stability.

关键词： liquid-cell transmission electron microscopy moisture degradation perovskite stability phase segregation solid-state NMR

Studying the effect of surfactant assisted low-salinity water flooding on clay-rich sandstones

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Petroleum 2024年第2期10卷 306-318页

作者： Saeed Khezerloo-ye Aghdam alireza kazemi mohammad Ahmadi Department of Petroleum Engineering Amirkabir University of Technology(AUT)TehranIran Department of Petroleum and Chemical Engineering College of EngineeringSultan Qaboos UniversityMuscatOman

Sandstone reservoirs often contain clay particles that can cause damage and reduce permeability during low-salinity water *** this study,the effect of surfactants on fine migration in clay-rich sandstones and its impact on oil recovery was ***,the impact of surfactants on interparticle forces in fine-matrix,fine-fine,and oil-matrix systems was *** results showed that both CTAB(cetyltrimethyl ammonium bromide)and QS(quillaja saponin)cause EDL compaction,weakening the repulsive ***,SDS(sodium dodecyl sulfate)and TX(triton X-100)do not affect the ***,the effect of surfactants on IFT reduction and wettability alteration was experimentally *** surfactants reduced IFT due to the surface excessive concentration *** wettability alteration experiment illustrated that although QS and CTAB compact EDL around oil and matrix particles leading to attraction force augmentation,they both alter wettability through adsorption on matrix and carboxylic groups present in crude oil,*** aqueous solutions were then injected into various clay-rich sandstone sanpacks,which resulted in increased oil ***,the mechanisms leading to enhanced oil recovery variedby surfactant *** increased recovery by 10%through IFT reduction and wettability alteration,while SDS and TX increased recovery by 12%and 9%,respectively,through wettability alteration and extreme fine *** contrast,partial fine migration in the QS flooding experiment reached a recovery increase of 18%.Permeability trends through experiments were also *** CTAB injection,permeability did not reduce,while QS aqueous solution reduced rock permeability to 5 m *** and TX reduced the magnitude of permeability to 2 m *** conclusion,this study demonstrates that surfactants can effectively improve oil recovery in clay-rich sandstones by altering the interparticle forces,reducing IFT,and changing *** results

关键词： Surfactant flooding Smart water Fine migration Recovery factor

An evaluation of harvesting costs in present and planned operations: case study—Waston District of Mazandaran Wood and Paper Industries

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Journal of Forestry Research 2018年第1期29卷 215-220页

作者： Majid Lotfalian mohammad ali Akbari Gorji Seyed Ataollah Hoseini Maryam kazemi Department of Forestry Faculty of Natural Resources Sari University of Agricultural Sciences and Natural Resources Forestry Master of Science Graduates Faculty of Natural Resources Sari University of Agricultural Sciences and Natural Resources Department of Forestry Faculty of Natural ResourcesTehran University

Amongst all forest utilization phases, harvesting plays a key role as the beginning phase of the utilization cycle and has a significant effect on the following *** this research, in order to examine the reduction of costs with respect to present and planned operations, the starting time of the harvesting or cutting phase and work flow were recorded. The starting time of each phase of the entire operation was recorded as well. Before harvesting the marked tree, the appropriate felling direction was determined and the azimuth of the correct direction was *** results indicate that there was not a meaningful relationship between the differences in direction of a leaning tree compared with the felling direction. However, there was a significant relationship between the difference of the defined and felling direction and the difference in tree leaning and defined direction. The same trend was observed between tree leaning and felling directions and tree leaning and defined directions. On the other hand,there was no significant relationship between tree leaning and felling directions and the defined and tree felling directions. In addition, this research shows that with an increase in tree volume, the time for tree cutting ***, when the difference of tree leaning and felling direction decreased, the time to cut the tree *** regression equation is Y = 168.9–0.14（the difference between tree leaning and felling direction）＋ 0.7（volume）.

关键词： Chainsaw Felling direction Cutting time Tree leaning direction

An experimental approach for measuring carbon dioxide diffusion coefficient in water and oil under supercritical conditions

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Chinese Journal of Chemical Engineering 2021年第6期34卷 160-170页

作者： mohammad Sadegh Sharafi Mehdi Ghasemi mohammad Ahmadi alireza kazemi Department of Petroleum Engineering Amirkabir University of Technology–Tehran PolytechnicIran

Several direct or indirect approaches have been proposed to measure diffusion coefficient of gases into *** main complexity of indirect techniques such as pressure decay method is interpreting early pressure-time data which strongly affected by incubation period effect or convective *** the current approach,accurate apparatus and precise experimental setup including a high pressure and temperature PVT cell,a high precision Sanchez pump,heating and recording sub-system are implemented and a novel data analysis procedure is applied to modify pressure decay *** effect of incubation period is reduced remarkably and diffusion coefficient of carbon dioxide in water in wide range of pressures and temperatures is determined and the effects of temperature,pressure and carbon dioxide phase alteration from gas to supercritical are investigated and the value of uncertainty is ***,diffusion coefficient of CO_(2) and methane in an oil sample from one of the Iranian southwest oil formations is determined precisely using the experimental approach while no incubation period is *** results showed that incubation period duration decreases with increasing diffusion ***,when CO_(2) state is gas,rate of increasing diffusion coefficient with pressure is decreased with temperature and when CO_(2) state is supercritical,the rate of increasing diffusion coefficient with pressure is decreased significantly.

关键词： Diffusion coefficient Modified pressure decay method Incubation period Solubility uncertainty

Plant-based synthesis of NiO nanoparticles using salvia macrosiphon Boiss extract and examination of their water treatment

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Rare Metals 2020年第10期39卷 1134-1144页

作者： Zahra Sabouri Narges Fereydouni alireza Akbari Hasan ali Hosseini alireza Hashemzadeh mohammad Sadegh Amiri Reza kazemi Oskuee Majid Darroudi Department of Chemistry University of Payame NoorTehran 19395-4697Iran Neurogenic Inflammation Research Center University of Medical SciencesMashhad ***Iran NanoBioEletrochemistry Research Center University of Bam Medical SciencesBam ***Iran Department of Biology University of Payame NoorTehran 19395-4697Iran Targeted Drug Delivery Research Center Institute of Pharmaceutical TechnologyUniversity of Medical SciencesMashhad ***Iran Nuclear Medicine Research Center University of Medical SciencesMashhad ***Iran Department of Modern Sciences and Technologies School of MedicineUniversity of Medical SciencesMashhad ***Iran

The goal of this study was to synthesize nickel oxide nanoparticles(NiO-NPs)by the sol-gel method,which involved the use of salvia macrosiphon Boiss plant extract,Ni(NO3)2·6 H2 O as a capping agent,and a nickel precursor,*** synthesized NiO-NPs were characterized by Fourier transform infrared spectroscopy(FTIR),ultraviolet-visible(UV-Vis)spectrophotometer,X-ray diffraction(XRD),field electron scanning electron microscopy(FESEM)/energy-dispersive X-ray spectroscopy(EDX),thermo-gravimetric analysis/differential thermal analysis(TGA/DTA)and vibrating sample magnetometer(VSM)***,according to the results of UV-Vis,the gap band of nanoparticles was calculated to be in the range of about 2.9-3.9 *** photocatalytic activity of nanoparticles on methylene blue(MB)degradation was investigated and according to the results,about 80%MB was apparently degraded in the presence of NiO-NPs under UV-A light(11 W)after 5 h in pH^*** have evaluated the cytotoxicity of NiO-NPs on the multiple tumor cells by materials method,and all the utilized concentrations were observed to cause non-toxic effects;therefore,it can be suggested that these samples have the potential of being employed in different fields of medicine.

关键词： Nickel oxide nanoparticles Sol-gel Photocatalytic degradation Salvia macrosiphon Boiss plant extract Cytotoxicity

A dicationic,podand-like,ionic liquid water system accelerated copper-catalyzed azide-alkyne click reaction

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Chinese Chemical Letters 2014年第12期25卷 1643-1647页

作者： mohammad Javaherian Foad kazemi Masoumeh Ghaemi Department of Chemistry College of ScienceShahid Chamran University Department of Chemistry University for Advanced Studies in Basic Sciences

In this work,an effective,task specific,dicationic,podand-like ionic liquid was synthesized and applied to improve the capability features of click ***,to broaden the scope and decreasing the serious limitations of preparation methods of organic azides,a simple green procedure for the preparation of alkyl azides,the fundamental starting materials in click reactions,from alcohols under solvent-free conditions and microwave irradiation has been reported,for the first time.

关键词： Dicationic ionic liquid Click chemistry 1 2 3-Triazoles Alkyl azides Alkynes Microwave irradiation

A laboratory study of a novel bio-based nonionic surfactant to mitigate clay swelling

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Petroleum 2021年第2期7卷 178-187页

作者： Saeed Khezerloo-ye Aghdam alireza kazemi mohammad Ahmadi Department of Petroleum Engineering Amirkabir University of Technology(AUT)Iran

This study reports the applicability of quillaja saponin(QS)as a vigorous and environmentally friendly shale swelling *** is a natural surfactant,which is extracted from herbal *** inhibition strength of this surfactant was assessed through various experiments,such as sedimentation,inhibition,filtration,particle size,Scanning Electron Microscope(SEM)images,and cutting *** obtained from these tests illustrated that QS greatly inhibits clays from *** optimal concentration for QS in this intend was 10 g/*** of this surfactant with other common additives was also investigated,which showed that it is totally ***,the potential inhibition mechanism was assessed through thermal gravimetric analysis(TGA),zeta potential,and contact angle measurement *** coating,and wettability alteration of clay particles to the oil-wet state was recognized as the most probable mechanism.

关键词： Clay swelling Quillaja saponin Wettability alteration Bio-based surfactant