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A review of control strategies used for morphing aircraft applications

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Chinese Journal of Aeronautics 2024年第4期37卷 436-463页

作者： Muhammed S.PARANCHEERIVILAk.ATHIL Jafar S.PILAk.ADAN Rafic M.AJAJ Mohammadreza AMOOZGAR Davood asadi Yahya ZWEIRI Michael I.FRISWELL Department of Aerospace Engineering Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Department of Aerospace Engineering Advanced Research and Innovation Center(ARIC)Khalifa University of Science and TechnologyAbu DhabiUnited Arab Emirates Department of Mechanical Materials&Manufacturing EngineeringUniversity of NottinghamNottingham NG72RDUK Department of Aerospace Engineering Adana Alparslan Turkes Science and Technology UniversityTurkey College of Engineering Swansea UniversitySwansea SA18ENUK

This paper reviews the various control algorithms and strategies used for fixed-wing morphing aircraft applications. It is evident from the literature that the development of control algorithms for morphing aircraft technologies focused on three main areas. The first area is related to precise control of the shape of morphing concepts for various flight conditions. The second area is mainly related to the flight dynamics, stability, and control aspects of morphing aircraft. The third area deals mainly with aeroelastic control using morphing concepts either for load alleviation purposes and/or to control the instability boundaries. The design of controllers for morphing aircraft/wings is very challenging due to the large changes that can occur in the structural, aerodynamic, and inertial characteristics. In addition, the type of actuation system and actuation rate/speed can have a significant effect on the design of such controllers. The aerospace community is in strong need of such a critical review especially as morphing aircraft technologies move from fundamental research at a low Technology Readiness Level(TRL) to real-life applications. This critical review aims to identify research gaps and propose future directions. In this paper, research activities/papers are categorized according to the control strategy used. This ranges from simple Proportional Integral Derivative(PID) controllers at one end to complex robust adaptive controllers and deep learning algorithms at the other end. This includes analytical, computational, and experimental studies. In addition, the various dynamic models used and their fidelities are highlighted and discussed.

关键词： Control strategies Morphing aircraft Shape morphing Flight dynamics Aeroelasticity

The effect of celastrol in combination with 5-fluorouracil on proliferation and apoptosis of gastric cancer cell lines

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Oncology Research 2024年第7期32卷 1231-1237页

作者： MOHAMMAD-TAGHI MORADI DHIYA ALTEMEMY MAJID asadi-SAMANI PEGAH k.OSRAVIAN MARZIYEH SOLTANI LEILA HASHEMI AZADEH SAMIEI-SEFAT Medical Plants Research Center Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran Department of Pharmaceutics College of PharmacyAl-Zahraa University for WomenKarbalaIraq Cellular and Molecular Research Center Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran

Back.round:Despite the availability of chemotherapy drugs such as 5-ﬂuorouracil(5-FU),the treatment of some cancers such as gastric cancer remains challenging due to drug resistance and side *** study aimed to investigate the effect of celastrol in combination with the chemotherapy drug 5-FU on proliferation and induction of apoptosis in human gastric cancer cell lines(AGS and EPG85-257).Materials and Methods:In this in vitro study,AGS and EPG85-257 cells were treated with different concentrations of celastrol,5-FU,and their *** proliferation was assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide(MTT)*** synergistic effect of 5-FU and celastrol was studied using Compusyn *** DNA content at different phases of the cell cycle and apoptosis rate was measured usingﬂow ***:Co-treatment with low concentrations(10%inhibitory concentration(IC10))of celastrol and 5-FU signiﬁcantly reduced IC50(p<0.05)so that 48 h after treatment,IC50 was calculated at 3.77 and 6.9μM for celastrol,20.7 and 11.6μM for 5-FU,and 5.03 and 4.57μM for their combination for AGS and EPG85-257 cells,*** mean percentage of apoptosis for AGS cells treated with celastrol,5-FU,and their combination was obtained 23.9,41.2,and 61.9,and for EPG85-257 cells 5.65,46.9,and 55.7,*** addition,the 5-FU and celastrol-5-FU combination induced cell cycle arrest in the synthesis ***:Although celastrol could decrease the concentration of 5-ﬂuorouracil that sufﬁced to suppress gastric cancer cells,additional studies are required to arrive at conclusive evidence on the anticancer effects of celastrol.

关键词： Gastric cancer Celastrol Terpenoid Cell cycle regulation Apoptosis Synergism

Dark.Matter Density Profiles of Selected Spiral Galaxies

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International Journal of Astronomy and Astrophysics 2024年第3期14卷 172-183页

作者： Alberto Sadun Brittany Salmon Conor Evans Masoud asadi-Zeydabadi Department of Physics University of Colorado Denver Denver USA

Understanding the dark.matter distribution throughout a galaxy can provide insight into its elusive nature. Numerous density profiles, such as the Navarro, Frenk.and White model, have been created in an attempt to study this distribution through analyzing orbital velocities of luminous matter and modeling dark.matter distributions to explain these observations. However, we are interested in a simple model to consider the significant fluctuations in rotation curves at larger radii. Therefore, our model is much simpler compared to those previously mentioned. Our model used all the observational data available for four selected galactic rotation curves. These data present a significant variation in the orbital velocity of matter at the same distances. By running real observational data through our model, we show that the density of the dark.matter within them shows real complex structure, which is not suggested by other computational models. Our aim of this paper is to model this structure and then speculate as to the cause and implications of these density fluctuations.

关键词： Dark.Matter Density Galactic Rotation Curves Spiral Galaxies NGC 2841 NGC 4527 NGC 4945 NGC 3198

Analysis of the COVID-19, Outbreak.in Brazil Using Topological Weighted Centroid: An Intelligent Geographic Information System Approach

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Journal of Data Analysis and Information Processing 2024年第2期12卷 248-266页

作者： Masoud asadi-Zeydabadi Marina Mizuk.shi Massimo Buscema Giulia Massini Weldon Lodwick Department of Physics University of Colorado Denver Colorado USA Institute of Mathematics and Statistics Federal University of Goi&#225s Goiania Goi&#225s Brazil Semeion Research Center Rome Italy Department of Mathematical and Statistical Sciences University of Colorado Denver Colorado USA

This study used Topological Weighted Centroid (TWC) to analyze the Coronavirus outbreak.in Brazil. This analysis only uses latitude and longitude in formation of the capitals with the confirmed cases on May 24, 2020 to illustrate the usefulness of TWC though any date could have been used. There are three types of TWC analyses, each type having five associated algorithms that produce fifteen maps, TWC-Original, TWC-Frequency and TWC-Windowing. We focus on TWC-Original to illustrate our approach. The TWC method without using the transportation information predicts the network.for COVID-19 outbreak.that matches very well with the main radial transportation routes network.in Brazil.

关键词： COVID-19 Topological Weighted Centroid (TWC) Algorithms TWC-Original TWC-Frequency and TWC-Windowing

Role of molecular imaging in prognosis,diagnosis,and treatment of gastrointestinal cancers:An update on new therapeutic methods

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World Journal of Methodology 2024年第4期14卷 43-60页

作者： Mobina Fathi Hayder Jasim Taher Sabah Jassim Al-Rubiae Shirin Yaghoobpoor Ashk.n Bahrami Reza Eshraghi Hossein Sadri Mahsa asadi Anar Ali Gholamrezanezhad Student Research Committee School of MedicineShahid Beheshti University of Medical SciencesTehran ***Iran Department of Radiology Hilla University CollegeBabylon 00964Iraq Faculty of Medicine Kashan University of Medical SciencesKashan ***Iran Department of Radiology Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCA 90033United States

One of the leading causes of cancer-related death is gastrointestinal cancer,which has a significant morbidity and mortality *** preoperative risk.assessment is essential for directing patient care,its biological behavior cannot be accurately predicted by conventional imaging *** pathophysiological information in anatomical imaging that cannot be visually identified can now be converted into high-dimensional quantitative image features thank. to the developing discipline of molecular *** order to enable molecular tissue profile in vivo,molecular imaging has most recently been utilized to phenotype the expression of single receptors and targets of biological *** is expected that molecular imaging will become increasingly important in the near future,driven by the expanding range of biological therapies for *** this live molecular fingerprinting,molecular imaging can be utilized to drive expression-tailored customized *** technical aspects of molecular imaging are first briefly discussed in this review,followed by an examination of the most recent research on the diagnosis,prognosis,and potential future clinical methods of molecular imaging for GI tract malignancies.

关键词： Molecular imaging Personalized medicine Gastrointestinal cancers Positron emission tomography-computed tomography

Mechanical properties and microstructural evolution of rheocast A356 semi-solid slurry prepared by annular electromagnetic stirring

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China Foundry 2023年第4期20卷 315-328页

作者： Mohammad Taghi asadi k.anouk. Department of Materials and Metallurgy Engineering Shahid Bahonar University of KermanP.O.Box ***KermanIran Mineral Industries Research Center(MIRC) Shahid Bahonar University of KermanP.O.Box ***KermanIran

Nowadays,having an effective technique in preparing semi-solid slurries for rheocasting process seems to be an essential *** this study,semi-solid slurry of A356 aluminum alloy was prepared by three-phase annular electromagnetic stirring(A-EMS)technique under different *** effects of stirring current,pouring temperature and stirring time on microstructural evolution,mean particle size,shape factor and solid fraction were *** rheocasting process was carried out by using a drop weight setup and to inject the prepared semi-solid slurry in optimal conditions into the step-die *** filling behavior and mechanical properties of parts were *** evolution showed that the best semi-solid slurry which had fine spherical particles with the average size of~27μm and a shape factor of~0.8 was achieved at the stirring current of 70 A,melt pouring temperature of 670℃,and stirring time of 30 *** these conditions,the step-die cavity was completely filled at die preheating temperature of 470℃.The hardness increases by decreasing step thick.ess as well as die preheating ***,the tensile properties are improved at lower die preheating *** fracture surface,which consists of a complex topography,indicates a typical ductile fracture.

关键词： semi-solid slurry annular electromagnetic stirring rheocast A356 aluminum alloy microstructural evolution mechanical properties magnetic flux density

A Sliding Mode Controller Based on Robust Model Reference Adaptive Proportional-integral Control for Stand-alone Three-phase Inverter

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Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 668-678页

作者： Hadi Esmaeili Mehdi asadi Arak.University of Technology ArakIran

This paper proposes a sliding mode controller based on robust model reference adaptive proportional-integral(RMRA-PI)control for a stand-alone voltage source inverter(SA-VSI).The proposed controller has two control loops where the coefficients of PI controller are regulated by the adaptive sliding *** method is used to regulate the output voltage of the inverter under different load conditions and uncertainty,and adapts the output to the reference model to reduce the total harmonic distortion(THD).In this paper,the stability of the proposed controller is proven by using Lyapunov's theory and Barbalet’s *** proposed controller performs well in voltage regulation such as low THD under sudden load change and ***,the results of the proposed controller are compared with PI controller to show the effectiveness of the presented control system.

关键词： Robust model reference adaptive proportional-integral(RMRA-PI)control stand-alone inverter three-phase inverter voltage control Lyapunov's theory

Analysis of element loss, densification, and defects in laser-based powder-bed fusion of magnesium alloy WE43

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Journal of Magnesium and Alloys 2022年第8期10卷 2118-2136页

作者： Faridreza Attarzadeh Ebrahim asadi Department of Mechanical Engineering The University of MemphisMemphisTN 38152United States

It is well k.own that laser-based powder-bed fusion(L-PBF) additive manufacturing of magnesium(Mg) and its alloys is associated with high Mg loss due to vaporization(MgLoss) and high incidence of many types of defects in the manufactured parts/samples. Despite this,MgLoss, densification, and defect characteristics have not been holistically considered in the determination of the optimal values of L-PBF processing parameters for Mg and its alloys. This study presents a combined modeling and experimental approach applied for a widely used Mg alloy(WE43) to address this shortcoming in the literature. First, an experimentally calibrated model is proposed to determine MgLoss as a function of the L-PBF processing parameters. The model couples the temperature profile using a double ellipsoidal heat source with a Langmuir vaporization model and is calibrated using the width of the single-track.L-PBF process and the measured Mglossusing inductively coupled plasma mass spectrometry(ICP-MS). Second, the densification of the samples is determined using a modification of the Archimedes method that considers the amount of MgLossin the calculation of the relative density. Third, a comprehensive and quantitative study is conducted on the relationships between the characteristics of porosity defects and the L-PBF processing parameters. Finally, the optimized L-PBF processing parameters are determined by considering the MgLoss, densification, and the characteristics of defects. The present study yields 0.23 wt.% MgLosscompared to 2 wt.% MgLossthat was reported in the previous studies. Furthermore, more than 99.5% densification is achieved while only ~2% and ~0.5% of the total defects are characterized as k.yhole and lack.of fusion defects, respectively.

关键词： WE43 magnesium alloy Additive manufacturing Powder-bed fusion Mg loss Vaporization Defects

Finite element simulation for elastic dislocation of the North-Tehran fault:The effects of geologic layering and slip distribution for the segment located in k.raj

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Frontiers of Structural and Civil Engineering 2022年第4期16卷 533-549页

作者： Pooya ZAk.AN Hossein asadi HAYEH Department of Civil Engineering Faculty of EngineeringArak UniversityArak 38156-88349Iran

The present study uses the finite element method for simulating the crustal deformation due to the dislocation of a segment of the North-Tehran fault located in the k.raj metropolis *** this regard,a geological map of k.raj that includes the fault segment is utilized in order to create the geometry of finite element ***,finite element analysis of homogeneous counterpart of the fault’s domain with two different sections was performed,and the results were compared to those of Ok.da’s analytical *** fault was modeled with the existing heterogeneity of the domain having been *** influences of both uniform and non-uniform slip distributions were ***,three levels of simplification for geometric creation of geological layers’boundaries were defined in order to evaluate the effects of the geometric complexity of the geological layering on the displacement responses obtained with the finite element *** addition to the assessment of slip distribution,layering complexity and heterogeneity,the results demonstrate both the capability and usefulness of the proposed models in the dislocation analysis for the k.raj segment of North-Tehran fault.

关键词： finite element method fault dislocation slip distribution the North-Tehran fault heterogeneity geological layering