检索结果-南通市图书馆

Some Applications of Differential Subordination of p-Valent Functions Associated with Cho-Kwon-Srivastava operator

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta mathematica Sinica,English Series 2009年第9期25卷 1483-1496页

作者： A.o.moSTAFA m.K.AoUF Department of mathematics Faculty of Science Mansoura University

making use of the principle of differential subordination, we investigate some inclusion relationships of certain subclasses of p-valent analytic functions which are defined by Cho-Kwon Srivast ava operator.

关键词： differential subordination p-valent functions Cho-Kwon-Srivastava operator

Dynamic modeling of a three-dimensional braided composite thin plate considering braiding directions

在线全文

学校读者我要写书评

暂无评论

Applied mathematics and mechanics(English Edition) 2025年第1期46卷 123-138页

作者： Chentong GAo Huiyu SUN Jianping GU W.m.HUANG College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics School of mechanical and Aerospace Engineering Nanyang Technological University Jiangsu Key Laboratory of Advanced Structural materials and Application Technology School of Materials Science and EngineeringNanjing Institute of Technology

Currently, there are a limited number of dynamic models available for braided composite plates with large overall motions, despite the incorporation of three-dimensional(3D) braided composites into rotating blade components. In this paper, a dynamic model of 3D 4-directional braided composite thin plates considering braiding directions is established. Based on Kirchhoff's plate assumptions, the displacement variables of the plate are expressed. By incorporating the braiding directions into the constitutive equation of the braided composites, the dynamic model of the plate considering braiding directions is obtained. The effects of the speeds, braiding directions, and braided angles on the responses of the plate with fixed-axis rotation and translational motion, respectively, are investigated. This paper presents a dynamic theory for calculating the deformation of 3D braided composite structures undergoing both translational and rotational motions. It also provides a simulation method for investigating the dynamic behavior of non-isotropic material plates in various applications.

关键词： three-dimensional (3D) braided composite braiding direction composite thin plate large overall motion dynamic model o313.7

A new approach to stability analysis of neural networks with time-varying delay via novel Lyapunov-Krasovskii functional

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第5期19卷 115-120页

作者： S.m.Lee o.m.Kwon Ju H.Park Department of Electronic Engineering Daegu UniversityGyungsanGyungbuk 712-714Republic of Korea College of Electrical and Computer Engineering 410 SungBong-RoHeungduk-GuChungbuk National UniversityCheongju 361-763Republic of Korea Nonlinear Dynamics Group Department of Electrical EngineeringYeungnam University214-1 Dae-DongKyongsan 712-749Republic of Korea

In this paper, new delay-dependent stability criteria for asymptotic stability of neural networks with time-varying delays are derived. The stability conditions are represented in terms of linear matrix inequalities （LmIs） by constructing new Lyapunov-Krasovskii functional. The proposed functional has an augmented quadratic form with states as well as the nonlinear function to consider the sector and the slope constraints. The less conservativeness of the proposed stability criteria can be guaranteed by using convex properties of the nonlinear function which satisfies the sector and slope bound. Numerical examples are presented to show the effectiveness of the proposed method.

关键词： neural networks Lyapunov-Krasovskii functional sector bound time-delay

Synchronization of chaotic Lur'e systems with delayed feedback control using deadzone nonlinearity

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第1期20卷 209-214页

作者： S.m.Lee o.m.Kwon Ju H.Park Department of Electronic Engineering Daegu UniversityGyungsan 712-714Republic of Korea School of Electrical Engineering Chungbuk National University410 SungBong-RoHeungduk-guCheongju 361-763Republic of Korea Department of Electrical Engineering Yeungnam University214-1 Dae-DongKyongsan 712-749Republic of Korea

In this paper we present a synchronization method for chaotic Lur＇e systems by constructing a new piecewise Lyapunov function. Using a delayed feedback control scheme, a delay-dependent stability criterion is derived for the synchronization of chaotic systems that are represented by Lur＇e systems with deadzone nonlinearity. Based on the Lyapunov-Krasovskii functional and by using some properties of the nonlinearity, a new delay-dependent stabilization condition for synchronization is obtained via linear matrix inequality （LmI） formulation. The criterion is less conservative than existing ones, and it will be verified through a numerical example.

关键词： Lur'e systems synchronization deadzone linear matrix inequality

Exact Solutions of the Dirac Equation for an Electron in a magnetic Field with Shape Invariant method

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2008年第11期25卷 3848-3851页

作者： m. R. Setare o. Hatami Department of Science University of Kurdistan Pasdaran Ave. Sanandaj Iran

Based on the shape invariance property we obtain exact solutions oI the Dirac equation for an electron moving in the presence of a certain varying magnetic field, then we also show its non-relativistic limit.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Peculiarity of magnetoresistance of discontinuous ferromagnetic thin films

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of minerals,metallurgy and materials 2017年第12期24卷 1459-1463页

作者： Yu.o. Shkurdoda I.m. Pazukha A.m. Chornous Department of Applied Physics Sumy State UniversitySumy 40007Ukraine

The magnetoresistive properties of discontinuous ferromagnetic Fe and Co thin films deposited by electron-beam sputtering onto glass substrates at room temperature were investigated. Tunnel magnetoresistance(mR) was observed for all of the as-deposited samples. The maximum mR was observed for Fe thin films with an effective thickness of 17 nm. In the case of the Co thin films, the annealing process led to a change of the type of mR to anisotropic at Co film thicknesses(dCo) of 15 ≤ d_(Co) ≤ 25 nm and to positive isotropic at thicknesses of d_(Co) m. By contrast, the mR type of Fe thin films did not change.

关键词： discontinuous thin films ferromagnetic structure magnetoresistance peculiarity

Bianchi type I in f(T) gravitational theories

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第5期25卷 58-64页

作者： m I Wanas G G L Nashed o A Ibrahim Astronomy Department Faculty of Science Cairo University Cairo Egypt Centre for Theoretical Physics The British University in Egypt El-Sherouk City Egypt mathematics Department Faculty of Science Ain Shams University Cairo Egypt Egyptian Relativity Group (ERG) Giza Egypt

A tetrad field that is homogeneous and anisotropic which contains two unknown functions A（t） and B（t） of cosmic time is applied to the field equations of f（T）, where T is the torsion scalar, T = T~μ_（νρ）S_μ^（νρ）. We calculate the equation of continuity and rewrite it as a product of two brackets, the first is a function of f（T） and the second is a function of the two unknowns A（t） and B（t）. We use two different relations between the two unknown functions A（t） and B（t） in the second bracket to solve it. Both of these relations give constant scalar torsion and solutions coincide with the de Sitter one. So,another assumption related to the contents of the matter fields is postulated. This assumption enables us to drive a solution with a non-constant value of the scalar torsion and a form of f（T） which represents ΛCDm.

关键词： f(T) gravitational theory Bianchi type I special solutions

Constraints on neutron skin thickness and symmetry energy of 208Pb through Skyrme forces and cluster model

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2020年第5期44卷 92-99页

作者： m.moghaddari Amiri o.N.Ghodsi Department of Physics Faculty of ScienceUniversity of MazandaranP.O.Box 47415-416BabolsarIran

We used the cluster structure properties of the 212Po to estimate the neutron skin thickness of *** this purpose,we considered two important components:(a)alpha decay is a low energy phenomenon;therefore,one can expect that the mean-field,which can explain the ground state properties of 212Po,does not change during the alpha decay process.(b)212Po has a high alpha cluster-like structure,two protons and two neutrons outside its core nucleus with a double magic closed-shell,and the cluster model is a powerful formalism for the estimation of alpha decay preformation factor of such *** slope of the symmetry energy of 208Pb is estimated to be 75±25 meV within the selected same mean-fields and Skyrme forces,which can simultaneously satisfy the ground-state properties of parent and daughter nuclei,as their neutron skin thicknesses are consistent with experimental data.

关键词： α-decay isospin asymmetry neutron-skin thickness Hartree-Fock formalism

Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2913-2914页

作者： William J.Flerlage mark L.Dell’Acqua Brian m.Cox Fereshteh S.Nugent Uniformed Services University of the Health Sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(Simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting