期刊文献+
共找到634篇文章
< 1 2 32 >
每页显示 20 50 100
Differentiability of Convex Functions in Locally Convex Spaces(Ⅰ)──Continuous Convex Functions and Gateaux Differentiability 被引量:3
1
作者 吴从 程立新 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1994年第1期7-12,共6页
The aim of this paper is to investigate the differentiability(Gateaux differentiabllity and subdifferentiability) of continuous convex functions on locally convex spaces and to study the behaviour of some important re... The aim of this paper is to investigate the differentiability(Gateaux differentiabllity and subdifferentiability) of continuous convex functions on locally convex spaces and to study the behaviour of some important results for this research area in locally convex spaces. 展开更多
关键词 ss: DIFFERENTIABILITY convex function localLY convex space
下载PDF
ON THE PRODUCT OF GTEAUX DIFFERENTIABILITY LOCALLY CONVEX SPACES 被引量:1
2
作者 沈喜生 程立新 《Acta Mathematica Scientia》 SCIE CSCD 2005年第3期395-400,共6页
A locally convex space is said to be a Gateaux differentiability space (GDS) provided every continuous convex function defined on a nonempty convex open subset D of the space is densely Gateaux differentiable in .D.Th... A locally convex space is said to be a Gateaux differentiability space (GDS) provided every continuous convex function defined on a nonempty convex open subset D of the space is densely Gateaux differentiable in .D.This paper shows that the product of a GDS and a family of separable Prechet spaces is a GDS,and that the product of a GDS and an arbitrary locally convex space endowed with the weak topology is a GDS. 展开更多
关键词 convex function locally convex space Gateaux differentiability space
下载PDF
SOME BEST APPROXIMATION RESULTS IN LOCALLY CONVEX SPACES 被引量:1
3
作者 A. R. Khan M. Aslam N. Hussain 《Analysis in Theory and Applications》 1996年第3期29-36,共8页
In this note we obtain generalization of well known results of carbone and Conti,Sehgal and Singh and Tanimoto concerning the existence of best approximation and simultaneous best approximation of continuous Junctions... In this note we obtain generalization of well known results of carbone and Conti,Sehgal and Singh and Tanimoto concerning the existence of best approximation and simultaneous best approximation of continuous Junctions from the set up of a normed space to the case of a Hausdorff locally convex space. 展开更多
关键词 SOME BEST APPROXIMATION RESULTS IN localLY convex SPACES LIM MAPS
下载PDF
Almost Fixed Points and Fixed Points of Upper [Lower] Semicontinuous Multimap on Locally G-convex Spaces 被引量:3
4
作者 朴勇杰 《Northeastern Mathematical Journal》 CSCD 2005年第4期391-396,共6页
In this paper, we use the well known KKM type theorem for generalized convex spaces due to Park (Elements of the KKM theory for generalized convex spaces, Korean J. Comp. Appl. Math., 7(2000), 1-28) to obtain an a... In this paper, we use the well known KKM type theorem for generalized convex spaces due to Park (Elements of the KKM theory for generalized convex spaces, Korean J. Comp. Appl. Math., 7(2000), 1-28) to obtain an almost fixed point theorem for upper [resp., lower] semicontinuous multimaps in locally G-convex spaces, and then give a fixed point theorem for upper semicontinuous multimap with closed Γ-convex values. 展开更多
关键词 G-convex space upper [lower] semicontinuous locally G-convex space ahnost fixed point property ahnost Γ-convex
下载PDF
CONSTRAINED MULTIOBJECTIVE GAMES IN LOCALLY CONVEX H-SPACES
5
作者 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2003年第5期499-508,共10页
A new class of constrained multiobjective games with infinite players in noncompact locally convex H-spaces without linear structure are introduced and studied.By applying a Fan-Glicksberg type fixed point theorem for... A new class of constrained multiobjective games with infinite players in noncompact locally convex H-spaces without linear structure are introduced and studied.By applying a Fan-Glicksberg type fixed point theorem for upper semicontinuous set-valued mappings with closed acyclic values and a maximum theorem,several existence theorems of weighted Nath-equilibria and Pareto equilibria for the constrained multiobjective games are proved in noncompact locally convex H-spaces.These theorems improve,unify and generalize the corresponding results of the multiobjective games in recent literatures. 展开更多
关键词 constrained multiobjective game maximum theorem fixed point weighted Nash-equilibria Pareto equilibria locally convex H-space
下载PDF
Convex Optimization Algorithms for Cooperative Localization in Autonomous Underwater Vehicles 被引量:9
6
作者 LIU Ming-Yong LI Wen-Bai PEI Xuan 《自动化学报》 EI CSCD 北大核心 2010年第5期704-710,共7页
关键词 最优化 自动化系统 自适应系统 AUV
下载PDF
ON FULLY CONVEX AND LOCALLY FULLY CONVEX BANACH SPACE*
7
作者 那启元 《Acta Mathematica Scientia》 SCIE CSCD 1990年第3期327-343,共17页
In this paper, we introduce the concept of locally fully convexity. We study the properties of fully convex and locally fully convex Banach spaces and the relations between them. We also give some applications of the ... In this paper, we introduce the concept of locally fully convexity. We study the properties of fully convex and locally fully convex Banach spaces and the relations between them. We also give some applications of the fully convex and locally fully convex Banach spaces. 展开更多
关键词 LFC TH LIM ON FULLY convex AND localLY FULLY convex BANACH SPACE
下载PDF
Equicontinuous Seton Locally Convex Spaces
8
作者 武俊德 曲文波 《Chinese Quarterly Journal of Mathematics》 CSCD 1998年第1期61-63, ,共3页
Let (E,γ) be a locally convex space and E′ its conjugate space. AE′ be an equicontinuous set on (E,γ). In this paper,we show that for each sequence {f i}A and {x j}E, if {x j} converges to 0 in (E,γ), then we can... Let (E,γ) be a locally convex space and E′ its conjugate space. AE′ be an equicontinuous set on (E,γ). In this paper,we show that for each sequence {f i}A and {x j}E, if {x j} converges to 0 in (E,γ), then we can find a f 0∈E′ and extract subsequences {f n i } and {x n j } such that {f n i } converges to f 0 on {x n j } uniformly. If (E,γ) is metrizable,then we can show that the converse is also valid. 展开更多
关键词 locally convex space EQUICONTINUOUS METRIZABLE
下载PDF
Differentiability of Convex Functions in Locally Convex Spaces(Ⅱ)──Frechet
9
作者 王晓敏 程立新 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1997年第1期1-4,共4页
DifferentiabilityofConvexFunctionsinLocallyConvexSpaces(II)──FrechetDifferentiabilityWUCongxinWANGXiaominCHE... DifferentiabilityofConvexFunctionsinLocallyConvexSpaces(II)──FrechetDifferentiabilityWUCongxinWANGXiaominCHENGLixin吴从aaay,王晓敏... 展开更多
关键词 王晓 Differentiability of convex Functions in locally convex Spaces Frechet
下载PDF
Generalized Bi quasi variational Inequalities in Locally Convex Topological Vector Spaces
10
作者 曾六川 《Chinese Quarterly Journal of Mathematics》 CSCD 1999年第3期43-53, ,共11页
In this paper we investigate generalized bi quasi variational inequalities in locally convex topological vector spaces. Motivated and inspired by the recent research work in this field,we establish several existence t... In this paper we investigate generalized bi quasi variational inequalities in locally convex topological vector spaces. Motivated and inspired by the recent research work in this field,we establish several existence theorems of solutions for generalized bi quasi variational inequalities,which are the extension and improvements of the earlier and recent results obtained previously by many authors including Sun and Ding [18],Chang and Zhang [23] and Zhang [24]. 展开更多
关键词 generalized bi quasi variational inequality locally convex topological vector space bilinear functional
下载PDF
The Theory of Vector-Valued Function in Locally Convex Space
11
作者 Lixin Ma 《Applied Mathematics》 2012年第8期903-906,共4页
In this paper, the vector-valued regular functions are extended to the locally convex space. The residues theory of the functions in the locally convex space is achieved. Thereby the Cauchy theory and Cauchy integral ... In this paper, the vector-valued regular functions are extended to the locally convex space. The residues theory of the functions in the locally convex space is achieved. Thereby the Cauchy theory and Cauchy integral formula are extended to the locally convex space. 展开更多
关键词 localLY convex SPACE REGULAR FUNCTION RESIDUE
下载PDF
A NEW CLASS OF LOCALLY CONVEX SPACES AND THE GENERALIZATION OF KALTON'S CLOSED GRAPH THEOREM
12
作者 丘京辉 《Acta Mathematica Scientia》 SCIE 1985年第4期389-397,共9页
By introducing the notions of L-spaces and L_r-spaces, a complete generalization of Kalton's closed graph theorem is obtained. It points out the class of L_r-spaces is the maximal class of range spaces for the clo... By introducing the notions of L-spaces and L_r-spaces, a complete generalization of Kalton's closed graph theorem is obtained. It points out the class of L_r-spaces is the maximal class of range spaces for the closed graph theorem when the class of domain spaces is the class of Mackey spaces with weakly * sequentially complete dual.Some examples are constructed showing that the class of L_r-spaces is strictly larger than the class of separable B_r-complete spaces.Some properties of L-spaces and L_r-spaces are discussed and the relations between B-complete (resp. B_r-complete) spaces and L-spaces (resp. L_r-spaces) are given. 展开更多
关键词 A NEW CLASS OF localLY convex SPACES AND THE GENERALIZATION OF KALTON’S CLOSED GRAPH THEOREM
下载PDF
THE SIMULTANEOUS APPROXIMATION IN THE LOCALLY CONVEX SPACES
13
作者 Song Wenhua(Dalian University of Technology, China) 《Analysis in Theory and Applications》 1995年第1期72-79,共8页
In this paper, we study the characterization of f-Chebyshev radius and f-Chebyshev centers and the existence of f-Chebyshev centers in locally convex spaces.
关键词 THE SIMULTANEOUS APPROXIMATION IN THE localLY convex SPACES
下载PDF
GENERALIZED VECTOR QUASI-EQUILIBRIUM PROBLEMSIN LOCALLY G-CONVEX SPACES
14
作者 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2005年第5期563-570,共8页
Some classes of generalized vector quasi-equilibrium problems ( in short, GVQEP) are introduced and studied in locally G-convex spaces which includes most of generalized vector equilibrium problems; generalized vector... Some classes of generalized vector quasi-equilibrium problems ( in short, GVQEP) are introduced and studied in locally G-convex spaces which includes most of generalized vector equilibrium problems; generalized vector variational inequality problems, quasi-equilibrium problems and quasi-variational inequality problems as special cases. First, an equilibrium existence theorem for one person games is proved in locally G-convex spaces.. As applications, some new existence theorems of solutions for the GVQEP are established in noncompact locally G-convex spaces. These results and argument methods are new and completely different from that in recent literature. 展开更多
关键词 generalized vector quasi-equilibrium problem one person game EQUILIBRIUM locally G-convex space
下载PDF
POTENTIAL SPACE ESTIMATES IN LOCAL HARDY SPACES FOR GREEN POTENTIALS IN CONVEX DOMAINS
15
作者 WangHenggeng JiaHouyu 《Analysis in Theory and Applications》 2004年第4期342-349,共8页
Let Ω be a bounded convex domain in Rn(n≥3) and G(x,y) be the Green function of the Laplace operator -△on Ω Let hPT(Ω) = {f∈D'(Ω) : (?)F ∈ hP(Rn), s.t. F|Ω = f}, by the atom characterization of Local Hard... Let Ω be a bounded convex domain in Rn(n≥3) and G(x,y) be the Green function of the Laplace operator -△on Ω Let hPT(Ω) = {f∈D'(Ω) : (?)F ∈ hP(Rn), s.t. F|Ω = f}, by the atom characterization of Local Hardy spaces in a bounded Lipschitz domain, the bound of f Ω(?)2(Gf) for every f ∈hPr(Ω) is obtained, where n/(n + 1) <p≤1. 展开更多
关键词 local Hardy space Green function convex domain potential estimate
下载PDF
Simulation of bacterial flagellar phase transition by non-convex and non-local continuum modeling
16
作者 Xiaoling Wang,1,a) Yongjun He,2,b) and Qingping Sun 3,c) 1) School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) UME-MS,ENSTA-ParisTech,Chemin de la Huni`ere,91761 Palaiseau Cedex,France 3) Department of Mechanical Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong,China 《Theoretical & Applied Mechanics Letters》 CAS 2011年第4期74-79,共6页
Bacterial flagellar filament can undergo a stress-induced polymorphic phase transition in both vitro and vivo environments.The filament has 12 different helical forms(phases) characterized by different pitch lengths a... Bacterial flagellar filament can undergo a stress-induced polymorphic phase transition in both vitro and vivo environments.The filament has 12 different helical forms(phases) characterized by different pitch lengths and helix radii.When subjected to the frictional force of flowing fluid,the filament changes between a left-handed normal phase and a right-handed semi-coiled phase via phase nucleation and growth.This paper develops non-local finite element method(FEM) to simulate the phase transition under a displacement-controlled loading condition(controlled helix-twist).The FEM formulation is based on the Ginzburg-Landau theory using a one-dimensional non-convex and non-local continuum model.To describe the processes of the phase nucleation and growth,viscosity-type kinetics is also used.The non-local FEM simulation captures the main features of the phase transition:two-phase coexistence with an interface of finite thickness,phase nucleation and phase growth with interface propagation.The non-local FEM model provides a tool to study the effects of the interfacial energy/thickness and loading conditions on the phase transition. 展开更多
关键词 polymorphic phase transition bacterial flagellar filament GINZBURG-LANDAU non-local elasticity finite element method non-convex viscoelasticity
下载PDF
无线传感器网络基于凸规划的改进定位算法:Convex-PIT 被引量:14
17
作者 张翰 刘锋 《传感技术学报》 CAS CSCD 北大核心 2007年第5期1129-1133,共5页
定位技术是无线传感器网络的关键技术之一,为了提高无线传感器网络的定位精度,在Convex算法基础上提出了Convex-PIT算法.Convex-PIT算法通过引入锚节点构成的三角形进一步滤掉节点不可能存在的区域,缩小节点可能存在范围,提高定位精度.C... 定位技术是无线传感器网络的关键技术之一,为了提高无线传感器网络的定位精度,在Convex算法基础上提出了Convex-PIT算法.Convex-PIT算法通过引入锚节点构成的三角形进一步滤掉节点不可能存在的区域,缩小节点可能存在范围,提高定位精度.Convex-PIT算法增加了判断未知节点是否在锚节点组成的三角形内的计算量,但不需要增加节点的硬件条件和额外的功能.仿真结果表明,和Convex算法相比,Convex-PIT可以明显的提高定位精度,在锚节点的比例从10%增加到30%的过程中,定位精度提高幅度平均约15%. 展开更多
关键词 无线传感器网络 定位convex质心
下载PDF
基于SOCP理论的船舶导航雷达海杂波抑制算法研究
18
作者 陈文瑞 罗宇轩 《舰船电子对抗》 2024年第3期57-62,共6页
为了有效降低海杂波对船舶导航雷达工作的影响,提出了一种基于二阶锥规划(SOCP)理论的杂波抑制算法。针对传统的实系数有限冲激响应(FIR)数字滤波器组无法保证通带群延时(小数)精度的问题,通过将初始优化问题转化为对偶问题进行求解,利... 为了有效降低海杂波对船舶导航雷达工作的影响,提出了一种基于二阶锥规划(SOCP)理论的杂波抑制算法。针对传统的实系数有限冲激响应(FIR)数字滤波器组无法保证通带群延时(小数)精度的问题,通过将初始优化问题转化为对偶问题进行求解,利用SOCP理论的分布式计算优势,稳定有效地求取其局部最优点,同时用重构的海杂波样本反复训练理论模型。通过仿真实验证明SOCP理论可以更好地重构信号检测模型,大幅抑制海杂波的影响,提高船舶导航雷达的目标检测能力。 展开更多
关键词 船舶导航雷达 海杂波 凸优化 局部最优 杂波抑制
下载PDF
How to Select the Best Sensors for TDOA and TDOA/AOA Localization? 被引量:4
19
作者 Yue Zhao Zan Li +2 位作者 Benjian Hao Pengwu Wan Linlin Wang 《China Communications》 SCIE CSCD 2019年第2期134-145,共12页
This paper focuses on the sensor subset optimization problem in time difference of arrival(TDOA) passive localization scenario. We seek for the best sensor combination by formulating a non-convex optimization problem,... This paper focuses on the sensor subset optimization problem in time difference of arrival(TDOA) passive localization scenario. We seek for the best sensor combination by formulating a non-convex optimization problem, which is to minimize the trace of covariance matrix of localization error under the condition that the number of selected sensors is given. The accuracy metric is described by the localization error covariance matrix of classical closed-form solution, which is introduced to convert the TDOA nonlinear equations into pseudo linear equations. The non-convex optimization problem is relaxed to a standard semi-definite program(SDP) and efficiently solved in a short time. In addition, we extend the sensor selection method to a mixed TDOA and angle of arrival(AOA) localization scenario with the presence of sensor position errors. Simulation results validate that the performance of the proposed sensor selection method is very close to the exhaustive search method. 展开更多
关键词 sensor selection localIZATION TDOA/AOA non-convex convex RELAXATION
下载PDF
QUASI_EQUILIBRIUM PROBLEMS IN NONCOMPACT GENERALIZED CONVEX SPACES 被引量:3
20
作者 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2000年第6期637-644,共8页
By applying a new fixed point theorem due to the author, some new equilibrium existence theorems of quasi-equilibrium problems are proved in noncompact generalized convex spaces. These theorems improve and generalize ... By applying a new fixed point theorem due to the author, some new equilibrium existence theorems of quasi-equilibrium problems are proved in noncompact generalized convex spaces. These theorems improve and generalize a number of important known results in recent literature. 展开更多
关键词 fixed point quasi-equilibrium problem compactly local intersection property generalized convex space
下载PDF
上一页 1 2 32 下一页 到第
使用帮助 返回顶部