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Existence results and behavior analysis for nonlinear age-dependent population dynamics problems with conformable fractional operator

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International Journal of Biomathematics 2024年第5期17卷 229-256页

作者： Hiba El Asraoui m'hamed El Omari Ali El mfadel Khalid Hilal Laboratory of Applied mathematics Scientific Computing Sultan moulay Slimane University BP 523 Beni MellalMorocco

In this paper,we investigate the existence of solutions and analyze the large-time behavior for Gurtin-maccamy population model involving conformable fractional *** a preliminary step,we construct a generic structure of the solution associated with our proposed model by utilizing some basic properties and tools of conformable fractional *** establish the existence of a unique solution of the given model with the given initial *** last,by using the upper and lower solutions for the characteristic equation,we define the upper and lower boundaries for the obtained solution and describe the large-time behavior of the total population.

关键词： Age-dependent population conformable fractional operator upper and lower boundary of the solution dynamics of populations

Chemically mediated Interactions between Grapevine, Aphid, Ladybird, and Ant in the Context of Insect Chemical Ecology

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1523-1542页

作者： Taghreed Alsufyani noura J.Alotaibi nour Houda m’sakni mona A.Almalki Eman m.Alghamdi Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Department of Biology College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Chemistry Department Faculty of ScienceKing AbdulAziz UniversityP.O.Box 80200Jeddah21589Saudi Arabia

This study simpliﬁes the complex relationship among grapevine plants,aphids,ladybirds,and ants,which is essential for effective pest management and ecological *** study investigated the impact of aphid attacks and the presence of ants and ladybirds on the volatile compounds proﬁle released into the chemosphere of the community consisting of the common vine Vitis vinifera,the aphid Aphis illinoisensis,the ladybird Cocci-nella undecimpunctata-and the ant Tapinoma *** study aims to analyze the volatile compounds emitted by the grapevine and surrounding insects in response to these intricate *** extraction of volatile organic compounds(VOCs)was carried out using closed-loop stripping(CLS)and then analyzed via gas chromatography-mass spectrometry(GC-mS)and principles coordinated analysis(PCA)was *** grapevine was exposed to different types and order of treatments,including non-infested,aphid-infested,aphid-infested with ant,aphid-infested with ladybird,and various combinations of ant and *** the aphid attack,the outcomes uncovered massive alterations in the volatile compound proﬁ*** grapevine displayed distinct emissions of germacrene D,an alcohol,and an alkene compared to non-infested *** characteristic VOC proﬁle was the share of infested grapes in the presence of ants,with benzene derivatives and sesquiterpenes dominating the *** coexistence of ladybirds with ants and aphids resulted in a dif-ferent volatile proﬁle characterized by elevated levels of aldehydes,ketones,α-farnesene,and its hydroxy *** was concluded that the emission of VOCs into the chemosphere of the grapevine communities varied qualitatively and quantitatively depending on the level of the relationship complexity within each community in response to the infestation of grapevines by aphids,the presence of ladybirds as natural predators,and the presence of ant as *** grapevine’s status-dependent compounds

关键词： Aphids Aphis illinoisensis volatile organic compounds chemosphere pest management gas chromatography-mass spectrometry closed-loop stripping

Natural Convection of a Power-Law Nanofluid in a Square Cavity with a Vertical Fin

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Fluid Dynamics & materials Processing 2024年第9期20卷 2091-2108页

作者： Amira m’hadbi mohammed El Ganaoui Haïkel Ben hamed Amenallah Guizani Khalid Chtaibi LERmAB Department of Transition and Energy Efficiency ProfessionsIUT H Poincaréde LongwyUniversity of LorraineLongwy54400France LPT Center for Energy Research and Technologies(Borj Cedria2084)University of Tunis El ManarTunis1068Tunisia LTI Department of Mechanical Engineering and ProductionIUTUniversity of Picardie Jules-VerneAmiens80025France

The behavior of non-Newtonian power-law nanofluids under free convection heat transfer conditions in a cooled square enclosure equipped with a heated fin is investigated *** particular,the impact of nanofluids,composed of water and Al_(2)O_(3),TiO_(2),and Cu nanoparticles,on heat transfer enhancement is *** aim of this research is also to analyze the influence of different parameters,including the Rayleigh number(Ra=10^(4)-10^(6)),nanoparticle volume fraction(φ=0%-20%),non-Newtonian power-law indexes(n=0.6-1.4),and fin dimensions(Ar=0.3,0.5,and 0.7).Streamlines and isotherms are used to depict flow and related heat transfer *** indicate that thermal performance improves with increasing Rayleigh number,regardless of the nanoparticle type or nanofluid rheological *** suggests that the buoyancy force has a significant impact on heat transfer,particularly near the heat *** Nusselt number is more sensitive to variations in Cu nanoparticle volume fractions compared to Al₂O₃and TiO₂.moreover,the average Nusselt numbers for power-law nanofluids with n1)are greater(smaller)than for Newtonian fluids due to the decrease(increase)in viscosity with increasing(decreasing)shear rate,at the same values of Rayleigh number Ra owing to the amplification(attenuation)of the convective ***,the most substantial enhancement is observed with Cu-water shear-thinning nanofluid,where the Nusselt number increases by 136%when changing from Newtonian to shear thinning behavior and by 154.9%when adding 16%nanoparticle volume ***,an even larger increase of 57%in the average Nusselt number is obtained on increasing the fin length from 0.3 to 0.7.

关键词： Heat transfer nanofluid non-Newtonian fluid natural convection

Temperature-jump tensile tests to induce optimized TRIP/TWIP effect in a metastable austenitic stainless steel

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International Journal of minerals,metallurgy and materials 2024年第9期31卷 2025-2036页

作者： mohammad Javad Sohrabi hamed mirzadeh Saeed Sadeghpour Abdol Reza Geranmayeh Reza mahmudi School of metallurgy and materials Engineering College of EngineeringUniversity of Tehran14395-515TehranIran Centre for Advanced Steels Research Materials and Mechanical EngineeringUniversity of Oulu90014 OuluFinland

In the present work,plastic deformation mechanisms were initially tailored by adjusting the deformation temperature in the range of 0 to 200℃ in AISI 304L austenitic stainless steel,aiming to optimize the strength-ductility *** was shown that the combined twinning-induced plasticity(TWIP)/transformation-induced plasticity(TRIP)effects and a wider strain range for the TRIP effect up to higher strains by adjusting the deformation temperature are good strategies to improve the strength-ductility synergy of this metastable stainless *** this regard,by consideration of the observed temperature-dependency of plastic deformation,the controlled sequence of TWIP and TRIP effects for archiving superior strength-ductility trade-off was intended by the pre-designed temperature jump tensile ***,the optimum tensile toughness of 846 mJ/m^(3) and total elongation to 133% were obtained by this strategy via exploiting the advantages of the TWIP effect at 100℃ and the TRIP effect at 25℃ at the later stages of the ***,a deformation-temperature-transformation(DTT)diagram was developed for this metastable ***,based on work-hardening analysis,it was found that the main phenomenon constraining further improvement in the ductility and strengthening was the yielding of the deformation-induced α′-martensite.

关键词： metastable stainless steels transformation-induced plasticity twinning-induced plasticity stacking fault energy mechanical properties

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非等温时效对含银Al-mg-Si合金多层摩擦表面显微组织和腐蚀行为的影响

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Transactions of Nonferrous metals Society of China 2024年第2期34卷 408-422页

作者： hamed JAmSHIDI AVAL Department of materials Engineering Babol Noshirvani University of TechnologyBabol47148-71167Iran

研究非等温时效对添加不同银含量Al-mg-Si合金多层摩擦表面显微组织和腐蚀行为的影响。通过在耗材棒横截面上钻孔的方式添加4%、8%和13%(质量分数)的银。采用光学显微镜和电子显微镜研究涂层的显微组织,采用显微硬度和拉伸实验研究涂层... 详细信息

研究非等温时效对添加不同银含量Al-mg-Si合金多层摩擦表面显微组织和腐蚀行为的影响。通过在耗材棒横截面上钻孔的方式添加4%、8%和13%(质量分数)的银。采用光学显微镜和电子显微镜研究涂层的显微组织,采用显微硬度和拉伸实验研究涂层的力学性能,采用电化学测试研究样品的耐腐蚀性。结果表明,随着银添加量从4%(质量分数)增加到13%(质量分数),摩擦堆焊表面层的晶粒尺寸从(1.5±0.3)μm减小到(1.0±0.3)μm。铝基体中的溶质银能够加速Al-mg-Si合金的析出动力学。经非等温时效处理后,含银涂层的屈服强度和抗拉强度分别比不含银涂层高50.6%和43.5%。经非等温时效处理后,材料的腐蚀电流密度降低,含银和不含银样品的耐腐蚀性均提高,含银涂层的耐蚀性比无银镀层提高了96.5%。

关键词：非等温时效显微组织腐蚀行为 Al-mg-Si合金银添加剂多层摩擦堆焊

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A Study on the Second Order Tangent Bundles over Bi-K■hlerian manifolds

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Chinese Annals of mathematics,Series B 2024年第5期45卷 777-804页

作者： nour Elhouda DJAA Aydin GEZER Abderrahim ZAGANE Relizane University Faculty of Sciences and Technology Department of Mathematics Ataturk University Faculty of Science Department of Mathematics

Abstract This paper aims to study the Berger type deformed Sasaki metric gBSon the second order tangent bundle T2m over a bi-K■hlerian manifold *** authors firstly find the Levi-Civita connection of the Berger type deformed Sasaki metric gBSand calculate all forms of Riemannian curvature tensors of this ***,they study geodesics on the second order tangent bundle T2m and bi-unit second order tangent bundle T21,1m,and characterize a geodesic of the bi-unit second order tangent bundle in terms of geodesic curvatures of its projection to the ***,they present some conditions for a sectionσ:m→T2m to be harmonic and study the harmonicity of the different canonical projections and inclusions of (T2m,gBS).moreover,they search the harmonicity of the Berger type deformed Sasaki metric gBSand the Sasaki metric gSwith respect to each other.

关键词： Berger type deformed Sasaki metric Bi-Kählerian structure Geodesics Harmonicity Riemannian curvature tensor Second order tangent bundle

Targeted anti-tumor synergistic effects of myc decoy oligodeoxynucleotides-loaded selenium nanostructure combined with chemoradiotherapy on LNCaP prostate cancer cells

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Oncology Research 2024年第1期32卷 101-125页

作者： ROGHAYEH GHORBANI mAHmOUD GHARBAVI ALI SHARAFI ELHAm RISmANI hamed REZAEEJAm YOUSEF mORTAZAVI BEHROOZ JOHARI Department of medical Biotechnology School of MedicineZanjan University of Medical SciencesZanjanIran Nanotechnology Research Center Ahvaz Jundishapur University of Medical SciencesAhvazIran Zanjan Pharmaceutical Biotechnology Research Center Zanjan University of Medical SciencesZanjanIran Department of Pharmaceutical Biotechnology School of PharmacyZanjan University of Medical SciencesZanjanIran molecular medicine Department Biotechnology Research CenterPasteur Institute of IranPasteur AvenueTehranIran Department of Radiology Technology School of Allied Medical SciencesZanjan University of Medical SciencesZanjanIran

In the present study,we investigated the synergistic effects of targeted methotrexate-selenium nanostructure containing myc decoy oligodeoxynucleotides along with X-irradiation exposure as a combination therapy on LNCaP prostate cancer *** decoy ODNs were designed based on the promoter of Bcl-2 gene and analyzed by molecular docking and molecular dynamics *** were loaded on the synthesized Se@BSA@Chi-mTX *** physicochemical characteristics of nanostructures were determined by FTIR,DLS,UV-vis,TEm,EDX,in vitro release,and hemolysis ***,the cytotoxicity properties of them with and without X-irradiation were investigated by uptake,mTT,cell cycle,apoptosis,and scratch assays on the LNCaP cell *** results of DLS and TEm showed negative charge(−9 mV)and nanometer size(40 nm)for Se@BSA@Chi-DEC-mTX NPs,*** results of FTIR,UV-vis,and EDX showed the proper interaction of different parts and the correct synthesis of *** results of hemolysis showed the hemocompatibility of this nanoparticle in concentrations less than 6 mg/*** ODNs release from the nanostructures showed a pH-dependent manner,and the release rate was 15%higher in acidic *** targeted Se@BSA@Chi-labeled ODN-mTX NPs were efficiently taken up by LNCaP cells by targeting the prostate-specific membrane antigen(PSmA).The significant synergistic effects of nanostructure(containing mTX drug)treatment along with X-irradiation showed cell growth inhibition,apoptosis induction(~57%),cell cycle arrest(G2/m phase),and migration inhibition(up to 90%)compared to the *** results suggested that the Se@BSA@Chi-DEC-mTX NPs can potentially suppress the cell growth of LNCaP *** nanostructure system can be a promising approach for targeted drug delivery and chemoradiotherapy in prostate cancer treatment.

关键词： Chemoradiotherapy Combination therapy Decoy oligodeoxynucleotides myc transcription factor Selenium nanoparticle Prostate cancer

Actuator and sensor fault isolation in a class of nonlinear dynamical systems

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Journal of Automation and Intelligence 2024年第2期3卷 57-72页

作者： hamed Tirandaz Christodoulos Keliris marios m.Polycarpou KIOS Research Center for Intelligent Systems and Networks and the Department of Electrical and Computer EngineeringUniversity of CyprusNicosia 1678Cyprus

Fault isolation in dynamical systems is a challenging task due to modeling uncertainty and measurement noise,interactive effects of multiple faults and fault *** paper proposes a unified approach for isolation of multiple actuator or sensor faults in a class of nonlinear uncertain dynamical *** and sensor fault isolation are accomplished in two independent modules,that monitor the system and are able to isolate the potential faulty actuator(s)or sensor(s).For the sensor fault isolation(SFI)case,a module is designed which monitors the system and utilizes an adaptive isolation threshold on the output residuals computed via a nonlinear estimation scheme that allows the isolation of single/multiple faulty sensor(s).For the actuator fault isolation(AFI)case,a second module is designed,which utilizes a learning-based scheme for adaptive approximation of faulty actuator(s)and,based on a reasoning decision logic and suitably designed AFI thresholds,the faulty actuator(s)set can be *** effectiveness of the proposed fault isolation approach developed in this paper is demonstrated through a simulation example.

关键词： Actuator and sensor fault isolation Adaptive approximation Observer-based fault diagnosis Reasoning-based decision logic

挤压速度对搅拌摩擦反挤压法制备Cu-5%Ti_(2)SnC复合丝材性能的影响

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Transactions of Nonferrous metals Society of China 2024年第3期34卷 935-951页

作者： Amirhossein JAHANI hamed JAmSHIDI AVAL mohammad RAJABI Roohollah JAmAATI Department of materials Engineering Babol Noshirvani University of TechnologyShariati AvenueBabol 47148-71167Iran

对粉末冶金法制备的含5%(体积分数)Ti_(2)Sn CmAX相的初始复合材料进行搅拌摩擦反挤压(FSBE)处理,研究FSBE工艺的轴向横移速度对Cu-Ti_(2)Sn C复合线材显微组织、力学性能、电学性能和磨损性能的影响。结果表明,随着挤压速度的增加,显... 详细信息

对粉末冶金法制备的含5%(体积分数)Ti_(2)Sn CmAX相的初始复合材料进行搅拌摩擦反挤压(FSBE)处理,研究FSBE工艺的轴向横移速度对Cu-Ti_(2)Sn C复合线材显微组织、力学性能、电学性能和磨损性能的影响。结果表明,随着挤压速度的增加,显微组织中孪晶增多,Ti_(2)SnC颗粒细化,mAX相和Cu基体之间的界面结合改善。当转速为600r/min,轴向横移速度为25mm/min时,Cu-Ti_(2)SnC复合线材具有最大的硬度、屈服强度和极限抗拉强度,分别为HV 132.7、278.34mPa和485.15mPa,这是其更强的界面结合和更细的mAX相导致的。此外,当转速为600 r/min,轴向横移速度为25 mm/min时,Cu-Ti_(2)SnC复合丝的电导率最高,达到89.21%(IACS),磨损率最低,为0.0015 mg/m,这是其更大的晶粒尺寸、更强的界面结合与更低的密度导致的。

关键词：搅拌摩擦反挤压 Ti_(2)SnC mAX相铜基复合材料电导率

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