云南高校图书馆联盟文献共享服务平台- APPROXIMATIONS

检索规则说明：AND代表“并且”；OR代表“或者”；NOT代表“不包含”；(注意必须大写,运算符两边需空一格)

检索范例：范例一： (K=图书馆学 OR K=情报学) AND A=范并思　　　　范例二：J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual

全部期刊核心期刊 EI来源期刊 SCI来源期刊 CA来源期刊 CSCD来源期刊 CSSCI来源期刊

Three-parameter approximations of sums of locally dependent random variables via Stein's method: 《Science China Mathematics》2025年第3期677-706,共30页Zhonggen Su Xiaolin Wang; supported by National Natural Science Foundation of China(Grant Nos.12271475 and U23A2064)。; Let{Xi,i∈J}be a family of locally dependent non-negative integer-valued random variables with finite expectations and variances.We consider the sum W=∑_(i∈J)X_(i)and apply Stein's method to establish general upper ...; 关键词：Eros-Rényi random graph local dependence monochromatic edge Stein's method three-parameter distribution

Projective Hilbert modules and sequential approximations: 《Science China Mathematics》2025年第1期137-168,共32页Lawrence G.Brown Huaxin Lin; supported by the National Science Foundation of the US(Grant No.DMS-1954600);partially funded by the Shanghai Key Laboratory of Pure Mathematics and Mathematical Practice,Science and Technology Commission of Shanghai Municipality(Grant Nos.13dz2260400 and 22DZ2229014)。; We show that when A is a separable C^(*)-algebra,every countably generated Hilbert A-module is projective(with bounded module maps as morphisms).We also study the approximate extensions of bounded module maps.In the c...; 关键词：projective Hilbert modules simple C^(*)-algebras sequential approximations

Low Rank Tensor Decompositions and Approximations: 《Journal of the Operations Research Society of China》2024年第4期847-873,共27页Jiawang Nie Li Wang Zequn Zheng; supported by the NSF grant DMS-2110780.Li Wang is partially supported by the NSF grant DMS-2009689.; There exist linear relations among tensor entries of low rank tensors.These linear relations can be expressed by multi-linear polynomials,which are called generating polynomials.We use generating polynomials to comput...; 关键词：TENSOR DECOMPOSITION RANK APPROXIMATION Generating polynomial

WONG-ZAKAI APPROXIMATIONS FOR STOCHASTIC VOLTERRA EQUATIONS: 《Journal of Computational Mathematics》2024年第6期1526-1553,共28页Jie Xu Mingbo Zhang; support provided by the Key Scientific Research Project Plans of Henan Province Advanced Universities(No.24A110006);the NSFs of China(Grant Nos.11971154,12361030);by the Science and Technology Foundation of Jiangxi Education Department(Grant No.GJJ190265)。; In this paper,we shall prove a Wong-Zakai approximation for stochastic Volterra equations under appropriate assumptions.We may apply it to a class of stochastic differential equations with the kernel of fractional Bro...; 关键词：Stochastic Volterra equations Wong-Zakai approximations Fractional Brownian motion Subfractional Brownian motion Quadratic mean convergence

Hyperbolic Conservation Laws,Integral Balance Laws and Regularity of Fluxes: 《Communications on Applied Mathematics and Computation》2024年第4期2048-2063,共16页Matania Ben-Artzi Jiequan Li; supported by the NSFC(Nos.11771054,12072042,91852207);the Sino-German Research Group Project(No.GZ1465);the National Key Project GJXM92579.; Hyperbolic conservation laws arise in the context of continuum physics,and are mathematically presented in differential form and understood in the distributional(weak)sense.The formal application of the Gauss-Green th...; 关键词：Balance laws Hyperbolic conservation laws Finite volume approximations Flux regularity CONSISTENCY

Trigonometric tension B-spline collocation approximations for time fractional Burgers’equation: 《Journal of Ocean Engineering and Science》2024年第5期508-516,共9页Brajesh Kumar Singh Mukesh Gupta; This manuscript’s aim is to form and examine the numerical simulation of Caputo-time fractional nonlinear Burgers’equation via collocation approach with trigonometric tension B-splines as base functions.First,L 1 di...; 关键词：Fractional Burgers’equation Trigonometric tension B-spline Collocation scheme Gauss elimination method

On the analytical soliton approximations to fractional forced Korteweg-de Vries equation arising in fluids and plasmas using two novel techniques: 《Communications in Theoretical Physics》2024年第8期1-10,共10页Weaam Alhejaili Emad A Az-Zo’bi Rasool Shah S A El-Tantawy; Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2024R229), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia。; The current investigation examines the fractional forced Korteweg-de Vries(FF-KdV) equation,a critically significant evolution equation in various nonlinear branches of science. The equation in question and other asso...; 关键词：forced fractional KdV equation Caputo operator Yang homotopy perturbation method Yang transform decomposition method SOLITONS

Galerkin-Bernstein Approximations for the System of Third-Order Nonlinear Boundary Value Problems: 《Journal of Applied Mathematics and Physics》2024年第6期2083-2101,共19页Snigdha Dhar Md. Shafiqul Islam; This paper is devoted to find the numerical solutions of one dimensional general nonlinear system of third-order boundary value problems (BVPs) for the pair of functions using Galerkin weighted residual method. We der...; 关键词：System of Third-Order BVP Galerkin Method Bernstein Polynomials Nonlinear BVP Higher-Order BVP

Approximations to Isentropic Planar Magneto-Hydrodynamics Equations by Relaxed Euler-Type Systems: 《Chinese Annals of Mathematics,Series B》2024年第3期413-440,共28页Yachun LI Zhaoyang SHANG Chenmu WANG Liang ZHAO; supported by the National Natural Science Foundation of China(Nos.12161141004,12371221,11831011,12301277);the Fundamental Research Funds for the Central Universities and Shanghai Frontiers Science Center of Modern Analysis and the Postdoctoral Science Foundation of China(No.2021M692089).; In this paper, the authors consider an approximation to the isentropic planar Magneto-hydrodynamics(MHD for short) equations by a kind of relaxed Euler-type system. The approximation is based on the generalization of ...; 关键词：Planar MHD equations Relaxation limits Global convergence Stream function

GGA + U Study of the Optical Properties of α-BeH2: 《Open Journal of Applied Sciences》2024年第6期1507-1511,共5页Uko Ofe; The optical properties of α-BeH2 in an Orthorhombic crystal structure with the space group (Ibam) are investigated. We have calculated the optical properties including dielelectric function, refractive index and exti...; 关键词：Dielectric Function Optical Properties GGA and GGA + U Approximations

APPROXIMATIONS