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APPROXIMATION: 作品数：1231被引量：1216H指数：13; 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>>

Global hydrostatic approximation of the hyperbolic Navier-Stokes system with small Gevrey class 2 data In memory of Professor Geneviève Raugel被引量：2: 《Science China Mathematics》2022年第6期1109-1146,共38页Marius Paicu Ping Zhang; supported by K.C.Wong Education Foundation;supported by the Agence Nationale de la Recherche,Project IFSMACS(Interaction Fluide-Structure:Modélisation,analyse,contr?le et simulation)(Grant No.ANR-15-CE40-0010);supported by National Basic Research Program of China(Grant No.2021YFA1000800);National Natural Science Foundation of China(Grants Nos.11731007,12031006 and 11688101)。; We investigate the hydrostatic approximation of a hyperbolic version of Navier-Stokes equations,which is obtained by using the Cattaneo type law instead of the Fourier law,evolving in a thin strip R×(0,ε).The formal...; 关键词：incompressible hyperbolic Navier-Stokes equations hydrostatic approximation hyperbolic Prandtl system

Controllable precision of the projective truncation approximation for Green's functions: 《Chinese Physics B》2019年第4期317-325,共9页Peng Fan Ning-Hua Tong; Project supported by the National Key Basic Research Program of China(Grant No.2012CB921704);the National Natural Science Foundation of China(Grant No.11374362);the Fundamental Research Funds for the Central Universities;the Research Funds of Renmin University of China(Grant No.15XNLQ03); Recently, we developed the projective truncation approximation for the equation of motion of two-time Green's functions(Fan et al., Phys. Rev. B 97, 165140(2018)). In that approximation, the precision of results depen...; 关键词：PROJECTIVE TRUNCATION APPROXIMATION two-time Green’s functions SINGLE-BAND ANDERSON impurity model numerical RENORMALIZATION group

Efficient projected gradient methods for cardinality constrained optimization被引量：2: 《Science China Mathematics》2019年第2期245-268,共24页Fengmin Xu Yuhong Dai Zhihu Zhao Zongben Xu; supported by National Natural Science Foundation of China (Grant Nos. 11571271,11631013,11331012 and 71331001);the National Science Fund for Distinguished Young Scholars (Grant No. 11125107);the National 973 Program of China (Grant Nos. 2015CB856002 and 2013CB329404); Sparse optimization has attracted increasing attention in numerous areas such as compressed sensing, financial optimization and image processing. In this paper, we first consider a special class of cardinality constra...; 关键词：SPARSE APPROXIMATION projected GRADIENT method global CONVERGENCE signal recovery index tracking

Investigating the topological structure of quenched lattice QCD with overlap fermions using a multi-probing approximation: 《Chinese Physics C》2017年第10期37-48,共12页邹优豪张剑波熊光仪陈莹刘川刘玉斌马建平; Supported by National Natural Science Foundation of China(NSFC)(11335001,11275169,11075167);supported in part by the DFG and the NSFC(11261130311) through funds provided to the Sino-German CRC 110 "Symmetries and the Emergence of Structure in QCD";funded in part by National Basic Research Program of China(973 Program)(2015CB856700); The topological charge density and topological susceptibility are determined by a multi-probing approximation using overlap fermions in quenched SU（3） gauge theory. Then we investigate the topological structure of t...; 关键词：topological structure topological susceptibility multi-probing approximation topological clusters

Piezoelectricity in K_(1-x)Na_xNbO_3: First-principles calculation: 《Chinese Physics B》2015年第5期300-304,共5页李强张锐吕天全郑立梅; supported by the National Basic Research Program of China(Grant No.2013CB632900); The piezoelectric properties of K1-xNaxNbO3 are studied by using first-principles calculations within virtual crystal approximation. To understand the critical factors for the high piezoelectric response in K1-xNaxNbO...; 关键词：first principles morphotropic phase boundary PIEZOELECTRICITY virtual crystal approximation

Exact Bivariate Polynomial Factorization over Q by Approximation of Roots: 《Journal of Systems Science & Complexity》2015年第1期243-260,共18页FENG Yong WU Wenyuan ZHANG Jingzhong CHEN Jingwei; partly supported by the National Natural Science Foundation of China under Grant Nos.91118001 and 11170153;the National Key Basic Research Project of China under Grant No.2011CB302400;Chongqing Science and Technology Commission Project under Grant No.cstc2013jjys40001; Factorization of polynomials is one of the foundations of symbolic computation.Its applications arise in numerous branches of mathematics and other sciences.However,the present advanced programming languages such as C...; 关键词：Factorization of multivariate polynomials interpolation methods minimal polynomial numerical continuation.

Querying Big Data: Bridging Theory and Practice被引量：3: 《Journal of Computer Science & Technology》2014年第5期849-869,共21页樊文飞怀进鹏; supported in part by the National Basic Research 973 Program of China under Grant No.2014CB340302;Fan is also supported in part by the National Natural Science Foundation of China under Grant No.61133002;the Guangdong Innovative Research Team Program under Grant No.2011D005;Shenzhen Peacock Program under Grant No.1105100030834361;the Engineering and Physical Sciences Research Council of UK under Grant No.EP/J015377/1;the National Science Foundation of USA under Grant No.III-1302212; Big data introduces challenges to query answering, from theory to practice. A number of questions arise. What queries are ＂tractable＂ on big data？ How can we make big data ＂small＂ so that it is feasible to find e...; 关键词：big data query answering TRACTABILITY APPROXIMATION data quality

Global dynamical correlation energies in covariant density functional theory： Cranking approximation被引量：3: 《Frontiers of physics》2014年第4期529-536,共8页张前顺牛中明李志攀尧江明孟杰; We acknowledge S. Goriely, B. Sun, and P. W. Zhao for stimulating discussions. This work was supported in part by the National Undergraduate Training Programs for Innovation and Entrepreneurship （Project No. 201210635132）, the National Basic Research Program of China （973 Program）（Grant No. 2013CB834400）, the National Natural Science Foundation of China （Grant Nos. 10975008, 10947013, 11175002, 11105110, 11105111, and 11205004）, the Research Fund for the Doctoral Program of Higher Education （Grant No. 20110001110087）, the Natural Science Foundation of Chongqing （Grant No. cstc2011jjA0376）, and the Fundamental Research Funds for the Central Universities （Grant Nos. XDJK2010B007 and XDJK2011B002）.; Tje global dynamical correlation energies for 575 even even nuclei with proton numbers ranging from Z = 8 to Z = 108 calculated with the covariant density functional theory using the PC-PK1 parametrization are present...; 关键词：binding energies and masses nuclear density functional theory and extensions

Viscoelastic representation of surface waves in patchy saturated poroelastic media: 《Earthquake Science》2014年第4期421-431,共11页Yu Zhang Yixian Xu Jianghai Xia Ping Ping Shuangxi Zhang; support by the Natural Basic Research Program of China (the ‘‘973 Project’’,Grant No. 2013CB733303);the National Natural Science Foundation of China (Grant Nos. 41304077, 40974079);Postdoctoral Science Foundation of China (Grant No. 2013M531744);Key Laboratory of Geospace Environment and Geodesy (Grant Nos. 12-02-03); Wave-induced flow is observed as the domi- nated factor for P wave propagation at seismic frequencies. This mechanism has a mesoscopic scale nature. The inhomogeneous unsaturated patches are regarded larger than the p...; 关键词：Surface wave Patchy saturation Viscoelastic equivalence APPROXIMATION

Second-order two-scale method for bending behavior analysis of composite plate with 3-D periodic configuration and its approximation被引量：1: 《Science China Mathematics》2014年第8期1713-1732,共20页WANG ZiQiang CUI JunZhi; supported by National Natural Science Foundation of China(GrantNo.90916027);the Special Funds for National Basic Research Program of China(Grant No.2010CB832702);Foundation of Guizhou Science and Technology Department(Grant No.[2013]2144);the State Key Laboratory of Science and Engineering Computing; This paper considers the bending behaviors of composite plate with 3-D periodic configuration.A second-order two-scale(SOTS)computational method is designed by means of construction way.First,by 3-D elastic composite ...; 关键词：second-order two-scale computational method Reissner-Mindlin deformation pattern composite plate approximation analysis

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