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APPROXIMATION: 作品数：1232被引量：1219H指数：14; 导出分析报告; 相关领域：理学更多>>; 相关作者：曹飞龙吴嘎日迪谢庭藩沈燮昌周颂平更多>>; 相关机构：北京大学宁夏大学西北工业大学中国计量学院更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划国家教育部博士点基金中国博士后科学基金更多>>

On approximation of Bernstein-Stancu operators in movable interval: 《Applied Mathematics(A Journal of Chinese Universities)》2025年第1期85-101,共17页WAGN Feng-feng YU Dan-sheng; In the present paper,we obtain the converse results of approximation of a newly introduced genuine Bernstein-Durrmeyer operators in movable interval.We also get the moments properties of an auxiliary operator which ha...; 关键词：Bernstein-Stancu operators movable interval approximation rates Voronovskaja's asymptotic estimate

GTOC12: Results from the OptimiCS team: 《Astrodynamics》2025年第1期77-88,共12页Sébastien Goulet Vincent Debout Patrice Mathieu Vincent Cucchietti Maxime Journot Julien Asquier Romain Garmier Laurène Beauvalet Thierry Ceolin Laurent Chausson Pascal Parraud; Establishing a sustainable mining expedition for the asteroids of the main belt over the 2035–2050 horizon is the visionary problem of the 12th Global Trajectory Optimisation Competition. A fleet of mining ships must...; 关键词：GTOC trajectory optimization LOW-THRUST delta-V approximation asteroid sequence beam search tabu iterations

Integration of a hybrid vibration prediction model for railways into noise mapping software:methodology,assumptions and demonstration: 《Railway Engineering Science》2025年第1期1-26,共26页Pieter Reumers Geert Degrande Geert Lombaert David JThompson Evangelos Ntotsios Pascal Bouvet Brice Nélain Andreas Nuber; the project SILVARSTAR funded from the Shift2Rail Joint Undertaking under the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement 101015442。; Within the SILVARSTAR project,a user-friendly frequency-based hybrid prediction tool has been developed to assess the environmental impact of railway-induced vibration.This tool is integrated in existing noise mapping...; 关键词：Railway-induced vibration Hybrid vibration prediction model Experimental validation Low-speed approximation

Providing Robust and Low-Cost Edge Computing in Smart Grid:An Energy Harvesting Based Task Scheduling and Resource Management Framework: 《China Communications》2025年第2期226-240,共15页Xie Zhigang Song Xin Xu Siyang Cao Jing; supported in part by the National Natural Science Foundation of China under Grant No.61473066;in part by the Natural Science Foundation of Hebei Province under Grant No.F2021501020;in part by the S&T Program of Qinhuangdao under Grant No.202401A195;in part by the Science Research Project of Hebei Education Department under Grant No.QN2025008;in part by the Innovation Capability Improvement Plan Project of Hebei Province under Grant No.22567637H; Recently,one of the main challenges facing the smart grid is insufficient computing resources and intermittent energy supply for various distributed components(such as monitoring systems for renewable energy power sta...; 关键词：edge computing energy harvesting energy storage unit renewable energy sampling average approximation task scheduling

Betweenness Approximation for Edge Computing with Hypergraph Neural Networks: 《Tsinghua Science and Technology》2025年第1期331-344,共14页Yaguang Guo Wenxin Xie Qingren Wang Dengcheng Yan Yiwen Zhang; supported by the Anhui Province University Collaborative Innovation Project(No.GXXT-2022-091);the National Natural Science Foundation of China(No.62006003);the Natural Science Foundation of Anhui Province(No.2208085QF197);the Key Project of Nature Science Research for Universities of Anhui Province of China(Nos.2022AH040019 and 2022AH05008637);the Hefei Key Common Technology Project(No.GJ2022GX15).; Recent years have seen growing demand for the use of edge computing to achieve the full potential of the Internet of Things(IoTs),given that various IoT systems have been generating big data to facilitate modern laten...; 关键词：hypernetwork dismantling Graph Neural Network(GNN) betweenness approximation edge computing

Statistical analysis on the validity of the cold plasma approximation for chorus waves based on Van Allen Probe observations and their effects on radiation belt electrons: 《Earth and Planetary Physics》2025年第1期159-170,共12页AoJun Ren Jiang Yu Jing Wang ZuZheng Chen XiaoMan Liu; supported by the National Natural Science Foundation of China (NSFC) through Grant Number 42074193; Theoretical analysis has demonstrated that the dispersion relation of chorus waves plays an essential role in the resonant interaction and energy transformation between the waves and magnetospheric electrons.Previous ...; 关键词：chorus waves cold plasma approximation dispersion relations scattering rates

Finite Volume Element Method for Fractional Order Neutral Time-Delay Differential Equations: 《Engineering(科研)》2025年第1期30-52,共23页Zicheng Wei Qing Yang; Fractional-order time-delay differential equations can describe many complex physical phenomena with memory or delay effects, which are widely used in the fields of cell biology, control systems, signal processing, et...; 关键词：Fractional Order Time-Delay Differential Equation Finite Volume Element Method L1 Approximation Error Estimation Numerical Simulation

Effect of orbital symmetry on atomic ionization in near-infrared laser fields: 《Chinese Physics B》2025年第1期289-292,共4页Manqi Xu Shilin Hu Li Guo Jing Chen; Project supported by Li Ka Shing Foundation STUGTIIT Joint Research(Grant No.2024LKSFG02);the STU Scientific Research Foundation for Talents(Grant Nos.NTF22026,NTF23011,NTF23014,and NTF23036T);the National Basic Research Program of China(Grant No.2019YFA0307700);the National Natural Science Foundation of China(Grant Nos.12074239 and 12274300)。; We have performed a comparative study of the photoelectron spectra adopting different initial states(2s or 2_(p0))of hydrogen atoms in a near-infrared laser pulse by using the full three-dimensional time-dependent Sch...; 关键词：orbital symmetry photoelectron spectra strong-field approximation

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

Polar Decomposition-based Algorithms on the Product of Stiefel Manifolds with Applications in Tensor Approximation: 《Journal of the Operations Research Society of China》2024年第4期874-920,共47页Jian-Ze Li Shu-Zhong Zhang; supported by the National Natural Science Foundation of China(No.11601371);the Guangdong Basic and Applied Basic Research Foundation(No.2021A1515010232).; In this paper,we propose a general algorithmic framework to solve a class of optimization problems on the product of complex Stiefel manifolds based on the matrix polar decomposition.We establish the weak convergence,...; 关键词：Tensor approximation Manifold optimization Polar decomposition Convergence analysis Łojasiewicz gradient inequality Morse–Bott property

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