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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAmI m.EFTEKHArI Depar.m.nt of mechanical Engineering Shahid Bahonar University of Kerman

This study examines the nonlinear behaviors of a clamped-clamped porous pipe made of a functionally graded material(FGm) that conveys fluids and is equipped with a retaining clip, focusing on pr.m.ry resonance and subcritical dynamics. The nonlinear governing equations for the FGm pipe are derived by the extended Hamilton's principle, and subsequently discretized through the application of the Galerkin *** direct method of multi-scales is then used to solve the derived equations. A thorough analysis of various par.m.ters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a comprehensive understanding of the system's nonlinear dynamics. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the comparisons with metallic pipes emphasize the role of FGm composition. The examination of the forced response curves reveals saddle-node bifurcations and their dependence on par.m.ters such as the detuning par.m.ter and the power-law index, offering valuable insights into the system's nonlinear resonant behavior. Furthermore, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system response and resonance characteristics. This comprehensive analysis enhances the understanding of nonlinear behaviors in FGm porous pipes with a retaining clip, providing key insights for practical engineering applications in system design and optimization.

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Charaeterizability of the Group ~2D_p(3) by its Order Components,Where p≥5 is a Pr.m. Number Not of the Form 2~m+1

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Acta mathematica Sinica,English Series 2008年第7期24卷 1117-1126页

作者： m.r.DArAFSHEH School of mathematics College of ScienceUniversity of TehranTehranIran

The author will prove that the group ^2Dp（3） can be uniquely determined by its order components, where p ≠ 2^m ＋ 1 is a pr.m. number, p ≥ 5. more precisely, if OC（G） denotes the set of order components of G, we will prove OC（G） = OC（^2Dp（3）） if and only if G is isomorphic to ^2Dp（3）. A main consequence of our result is the validity of Thompson＇s conjecture for the groups under consideration.

关键词： pr.m. graph order component linear group

Preparation, Characterization, Biological Activity and 3D molecular.m.deling of mn（Ⅱ）, Co（Ⅱ）, Ni（Ⅱ）, Cu（Ⅱ）, Pd（Ⅱ） and ru（Ⅲ） Complexes of Some Sulfadrug Schiff Bases

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Chinese Journal of Chemistry 2012年第4期30卷 881-890页

作者： EL-Ghamry,H.A. Sakai,K. masaoka,S. EI-Baradie,K.Y Issa,r.m. Chemistry Depar.m.nt Faculty of ScienceTanta UniversityTantaEgypt Chemistry Depar.m.nt Faculty of ScienceKyushu UniversityFukuokaJapan Institute for.m.lecular Science National Institutes of Natural SciencesJapan

mn（Ⅱ）, Co（Ⅱ）, Ni（Ⅱ）, Cu（Ⅱ）, Pd（Ⅱ） and ru（Ⅲ） complexes of Schiff bases derived fr.m.the condensation of sulfaguanidine with 2,4-dihydroxy benzaldehyde （HL1）, 2-hydroxy-l-naphthaldehyde （HL2） and salicylaldehyde （HL3） have been synthesized. The structures of the prepared metal complexes were proposed based on elemental analysis, molar conductance, thermal analysis （TGA, DSC and DTG）, magnetic susceptibility measur.m.nts and spectroscopic techniques （Ir, UV-Vis, and ESr）. In all complexes, the ligand bonds to the metal ion through the azomethine nitrogen and a-hydroxy oxygen atoms. The structures of Pd（Ⅱ） complex 8 and ru（Ⅲ） complex 9 were found to be polynuclear. Two kinds of stereochemical geometries; distorted tetrahedral and distorted square py- r.m.dal, have been realized for the Cu（Ⅱ） complexes based on the results of UV-Vis, magnetic susceptibility and ESr spectra whereas octahedral geometry was predicted for Co（Ⅱ）, mn（Ⅱ） and ru（Ⅲ） complexes. Ni（Ⅱ） com- plexes were predicted to be square planar and tetrahedral and Pd（Ⅱ） complexes were found to be square planar. The antimicrobial activity of the ligands and their.m.tal complexes was also investigated against the gr.m.positive bac- teria Staphylococcus aures and Bacillus subtilis and gr.m.negative bacteria, Escherichia coli and Pesudomonas aeruginosa, by using the agar dilution method. Chlor.m.henicol was used as standard compound. The obtained data revealed that the metal complexes are more or less, active than the parent ligand and standard. The X-ray crys- tal structure of HL3 has been also reported.

关键词： sulfaguanidine transition metal complexes spectral studies biological activity crystal structure mo- lecular.m.deling

Neurogenesis dynamics in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural regeneration research 2025年第6期20卷 1565-1581页

作者： moawiah m.Naffaa Depar.m.nt of Psychology and Neuroscience Duke UniversityDurhamNCUSA Depar.m.nt of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons migrating to the granule cell layer and glomerular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit r.m.deling triggered by memory and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. moreover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory information processing. This adaptive process responds to changes in epithelial composition and contributes to the formation of olfactory memories by modulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions r.m.ins a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around mitral and tufted cells. This organizational pattern significantly impacts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and memory. Additionally, this organization is further shaped by axon terminals originating fr.m.cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these complex and highly interconnected processes have not been comprehensively studied as a whole. Therefore, this manuscript aims to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These mechanisms are thought to support olfactory learning and memory, potentially through increased

关键词： network adaptability neurogenesis neuronal communication olfactory bulb olfactory learning olfactory memory synaptic plasticity

mitochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflammaging-associated neurodegeneration

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Neural regeneration research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de Biología molecular Severo Ochoa(CBm) Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” comes fr.m.the Latin senescens, meaning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting fr.m.stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting

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QUArK mASSES

Chinese Physics C 2016年第10期40卷 653-660页

作者： A.V. manohar C.T. Sachrajda r.m. Barnett University of California San Diego University of Southampton LBNL

A. Introduction This note discusses some of the theoretical issues relevant for the determination of quark masses, which are fundamental par.m.ters of the Standard model of particle physics. Unlike the leptons, quarks are confined inside hadrons and are not observed as physical particles. Quark masses therefore cannot be measured directly, but must be determined indirectly through their influence on hadronic properties. Although one often speaks loosely of quark masses as one would of the mass of the electron or.m.on, any quantitative statement about the value of a quark mass must make careful reference to the particular theoretical fr.m.work that is used to define it. It is important to keep this scheme dependence in mind when using the quark mass values tabulated in the data listings.

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Transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 177-192页

作者： m.NAVEED m.ImrAN T.ASGHAr Z.ABBAS Depar.m.nt of mathematics Division of Science and TechnologyUniversity of Education Depar.m.nt of mathematics The Islamia University of Bahawalpur

This paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. The influence of magnetic fields is also inspected in terms of their physical characteristics. To depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for.m.mentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAm).The effects of significant flow par.m.ters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved par.m.ters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength par.m.ter and the radius of curvature par.m.ter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference par.m.ter, and the bio-convective Lewis number.

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Brain-penetrating neurotrophic factor.m.metics: HEr-096 as a disease-modifying therapy for Parkinson’s disease

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Neural regeneration research 2025年第4期20卷 1094-1095页

作者： Natalia Kulesskaya Kira m.Holmstr.m.Henri J.Huttunen Herantis Pharma Plc EspooFinland

Neurotrophic factors as a therapeutic approach in neurodegenerative diseases:A major unmet need in the field of central nervous system diseases is disease-modifying *** for decades there have been various symptomatic treatments available to alleviate the symptoms of the disease,disease-modification,*** that stop,significantly delay,or reverse the progression of the disease,has been turned out to a difficult goal to achieve.

关键词： diseases treatment therapeutic

Arctic sea-ice extent: No record minimum in 2023 or recent years

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 52-55页

作者： Ola m.Johannessen Tor I.Olaussen Nansen Scientific Society BergenNorway Nansen Environmental and r.m.te Sensing Center BergenNorway

Arctic sea-ice extent reaches its minimum each year in September. On 11 September 2023 the minimum was 4.969 million square kilometers(***^(2)). This was not a record low, which occurred in 2012, when the minimum was 4.175 ***^(2), 0.794 ***^(2) less than the minimum in 2023. However, the ice extent had decreased by 0.432 ***^(2) compared with 2022. Nevertheless, the summer.m.lting in 2023 was r.m.rkably less than expected when considering the strong heat waves in the atmosphere and ocean, with record temperatures set around the world. In general, there is a high correlation between the long-term decrease in sea-ice extent and the increasing CO_(2) in the atmosphere, where the increase of CO_(2) in recent decades explains about 80% of the decrease in sea ice in September, while the r.m.inder is caused by natural variability.

关键词： Sea ice Arctic minimum ice Climate

Hr.m.STUDY OF GrAIN BOUNDArY PHASES IN Fe-Ni-Co-Nb-Ti SUPErALLOY

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Acta metallurgica Sinica(English Letters) 1996年第6期9卷 595-600页

作者： r.m. Wang C.Z. Li S. W. Zhang and m.G.Yan(1)Institute of Aeronautical materials, Beijing 100095, China 2)Laboratory of Atomic Imaging of Solids, Institute of metal research, Chinese Academy of Sciences,Shenyang 110015, China 3)Beijing Laboratory of Elect Beijing Inst of Aeronautical Materials Beijing China

The microstructures of the grain boundary phases in Fe-Ni-Co-Nb-Ti superalloy have been studied by high resolution electron microscopy (Hr.m..Besides the Laves phase,three other grain boundary phases have been found and analyzed. The ε phase particles are needle-like with some stacking faults along the(0001) direction. The dominant phase at the grain boundaries is the orthorhombic phase that is also rod-like. High reselution image also confirms the existence of the triclinic phase at the grain boundaries that is irregular and scarce.

关键词： high resolution electron microscopy grain boundary phase,FeNi- Co superalloy