期刊文献+
共找到229篇文章
< 1 2 12 >
每页显示 20 50 100
CONVERGENCE OF IMPLICIT ITERATIVE PROCESS WITH ERRORS FOR A FINITE FAMILY OF ASYMPTOTICALLY NONEXPANSIVE MAPPINGS 被引量:5
1
作者 谷峰 《数学物理学报(A辑)》 CSCD 北大核心 2006年第B12期1131-1143,共13页
The purpose of this article is to study the weak and strong convergence of implicit iteration process with errors to a common fixed point for a finite family of asymptotically nonexpansive mappings and nonexpansive ma... The purpose of this article is to study the weak and strong convergence of implicit iteration process with errors to a common fixed point for a finite family of asymptotically nonexpansive mappings and nonexpansive mappings in Banach spaces. The results presented in this article extend and improve the corresponding results of [1, 2, 4-9, 11-15]. 展开更多
关键词 渐近不放大映射 不放大映射 迭代序列 巴纳赫空间
在线阅读 下载PDF
A Modified Averaging Composite Implicit Iteration Process for Common Fixed Points of a Finite Family of k-Strictly Asymptotically Pseudocontractive Mappings
2
作者 Donatus Igbokwe Oku Ini 《Advances in Pure Mathematics》 2011年第4期204-209,共6页
The composite implicit iteration process introduced by Su and Li [J. Math. Anal. Appl. 320 (2006) 882-891] is modified. A strong convergence theorem for approximation of common fixed points of finite family of k-stric... The composite implicit iteration process introduced by Su and Li [J. Math. Anal. Appl. 320 (2006) 882-891] is modified. A strong convergence theorem for approximation of common fixed points of finite family of k-strictly asymptotically pseudo-contractive mappings is proved in Banach spaces using the modified iteration process. 展开更多
关键词 implicit ITERATION Process k-Strictly ASYMPTOTICALLY Pseudo-Contractive maps Fixed POINTS
在线阅读 下载PDF
Algorithm of solutions for generalized nonlinear implicit quasivariational inclusions with fuzzy mappings
3
作者 胡学刚 《Journal of Chongqing University》 CAS 2006年第1期36-41,共6页
A class of generalized implicit quasivariational inclusions with fuzzy mappings in Hilbert space is discussed in this paper which proves an existence theorem of the solutions and proposes a new iterative algorithm and... A class of generalized implicit quasivariational inclusions with fuzzy mappings in Hilbert space is discussed in this paper which proves an existence theorem of the solutions and proposes a new iterative algorithm and the convergence of the iterative sequence generated by the new algorithm. These results extend and improve some recent corresponding achievements. 展开更多
关键词 generalized nonlinear implicit quasivariational inclusion with fuzzy mappings existence theorem of solutions ITERATIVE
在线阅读 下载PDF
China’s corridors-in-the-sky design and space-time congestion identification and the influence of air routes’ traffic flow 被引量:4
4
作者 DONG Yaqing LU Zi +2 位作者 LIU Yuan ZHANG Qiuluan WU Dianshuang 《Journal of Geographical Sciences》 SCIE CSCD 2019年第12期1999-2014,共16页
With rapid development of air transportation,the airspace structure of the future will need to be flexible and dynamic to accommodate the increase in traffic demand.The corridors-in-the-sky has become a new technology... With rapid development of air transportation,the airspace structure of the future will need to be flexible and dynamic to accommodate the increase in traffic demand.The corridors-in-the-sky has become a new technology to support the full exploitation and utilization of airspace resources.This paper proposes a method of designing corridor,identifying congestion state,and analyzing the influence of air routes’traffic flow.From this,we have reached a number of conclusions.(1)The congestion periods present the multi-peak"wavy"scattered distributions and the peaks back-end agglomeration characteristics in the whole day.(2)The congestion segments present the structural characteristics of unbalanced coverage and concentrated distribution to the crossing points.The corridors with high congestion level present as an italic"N-shaped"frame,which presents incomplete penetration of short segments.(3)For the temporal and spatial interaction,there are two types of congestion segments,and there are some common congestion periods in different congestion segments of multiple corridors.The high-density air route plays a relatively decisive role in corridor congestion,and the influence of two directions is unbalanced.This research can provide a basis for the dynamic evaluation of China’s airspace resources and corridors construction in the future. 展开更多
关键词 corridors-in-the-sky CONGESTION IDENTIFICATION AIR routes traffic flow space-time map China
原文传递
Multi-Level Knowledge Engineering Approach for Mapping Implicit Aspects to Explicit Aspects 被引量:4
5
作者 Jibran Mir Azhar Mahmood Shaheen Khatoon 《Computers, Materials & Continua》 SCIE EI 2022年第2期3491-3509,共19页
Aspect’s extraction is a critical task in aspect-based sentiment analysis,including explicit and implicit aspects identification.While extensive research has identified explicit aspects,little effort has been put for... Aspect’s extraction is a critical task in aspect-based sentiment analysis,including explicit and implicit aspects identification.While extensive research has identified explicit aspects,little effort has been put forward on implicit aspects extraction due to the complexity of the problem.Moreover,existing research on implicit aspect identification is widely carried out on product reviews targeting specific aspects while neglecting sentences’dependency problems.Therefore,in this paper,a multi-level knowledge engineering approach for identifying implicit movie aspects is proposed.The proposed method first identifies explicit aspects using a variant of BiLSTM and CRF(Bidirectional Long Short Memory-Conditional Random Field),which serve as a memory to process dependent sentences to infer implicit aspects.It can identify implicit aspects from four types of sentences,including independent and three types of dependent sentences.The study is evaluated on a largemovie reviews dataset with 50k examples.The experimental results showed that the explicit aspect identification method achieved 89%F1-score and implicit aspect extraction methods achieved 76%F1-score.In addition,the proposed approach also performs better than the state-of-the-art techniques(NMFIAD andML-KB+)on the product review dataset,where it achieved 93%precision,92%recall,and 93%F1-score. 展开更多
关键词 Movie NEs(named entities) ASPECTS opinion words annotation process memory implicit aspects implicit aspects mapping word embedding and BiLSTM
在线阅读 下载PDF
Space-Time Correlation Based Fast Regional Spectrum Sensing in Cognitive Radio 被引量:1
6
作者 Sai Huang Yuanyuan Yao +2 位作者 Zhiyong Feng Ping Zhang Yifan Zhang 《China Communications》 SCIE CSCD 2017年第5期78-90,共13页
In this paper,a space-time correlation based fast regional spectrum sensing(RSS)scheme is proposed to reduce the time and energy consumption of traditional spatial spectrum sensing. The target region is divided into s... In this paper,a space-time correlation based fast regional spectrum sensing(RSS)scheme is proposed to reduce the time and energy consumption of traditional spatial spectrum sensing. The target region is divided into small meshes,and all meshes are clustered into highly related groups using the spatial correlation among them. In each group,some representative meshes are selected as detecting meshes(DMs)using a multi-center mesh(MCM)clustering algorithm,while other meshes(EMs)are estimated according to their correlations with DMs and the Markov modeled dependence on history by MAP principle. Thus,detecting fewer meshes saves the sensing consumption. Since two independent estimation processes may provide contradictory results,minimum entropy principle is adopted to merge the results. Tested with data acquired by radio environment mapping measurement conducted in the downtown Beijing,our scheme is capable to reduce the consumption of traditional sensing method with acceptable sensing performance. 展开更多
关键词 Cognitive radio Channel occupancy estimation Dynamic spectrum access Radio environment mapping space-time correlation Spectrum sensing
在线阅读 下载PDF
FREDHOLM AND COMPACT MAPPINGS SHARING A VALUE
7
作者 J.M.Soriano 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2001年第6期682-686,共5页
Sufficient conditions are given to assert that two differentiable mappings between Banach spaces have common values. The proof is essentially based upon continuation methods.
关键词 zero point continuation methods C 1 HOMOTOPY surjective implicit function theorem compact mapping Fredholm mapping index zero INJECTIVE DIFFEOMORPHISM
在线阅读 下载PDF
g-η-Monotone mapping and resolvent operator technique for solving generalized implicit variational-like inclusions
8
作者 张清邦 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2007年第1期11-18,共8页
A new class of g-η-monotone mappings and a class of generalized implicit variational-like inclusions involving g-η-monotone mappings are introduced. The resolvent operator of g-η-monotone mappings is defined and it... A new class of g-η-monotone mappings and a class of generalized implicit variational-like inclusions involving g-η-monotone mappings are introduced. The resolvent operator of g-η-monotone mappings is defined and its Lipschitz continuity is presented, An iterative algorithm for approximating the solutions of generalized implicit wriational- like inclusions is suggested and analyzed. The convergence of iterative sequences generated by the algorithm is also proved, 展开更多
关键词 g-η-monotone mapping resolvent operator generalized implicit variational-like inclusion iterative algorithm
在线阅读 下载PDF
On the Equivalence of Implicit Kirk-Type Fixed Point Iteration Schemes for a General Class of Maps
9
作者 Alfred Olufemi Bosede Hudson Akewe +1 位作者 Omolara Fatimah Bakre Ashiribo Senapon Wusu 《Journal of Applied Mathematics and Physics》 2019年第1期123-137,共15页
In this paper, a modified implicit Kirk-multistep iteration scheme and a strong convergence result for a general class of maps in a normed linear space was established. It was also shown that the convergence of this i... In this paper, a modified implicit Kirk-multistep iteration scheme and a strong convergence result for a general class of maps in a normed linear space was established. It was also shown that the convergence of this iteration scheme is equivalent to the convergency of some other implicit Kirk-type iteration (implicit Kirk-Noor, implicit Kirk-Ishikawa and implicit Kirk-Mann iterations) for the same class of maps. Some numerical examples were considered to show that the equivalence of convergence results to the fixed point is true. The results unify most equivalence results in literature. 展开更多
关键词 implicit Kirk-Multistep implicit Kirk-Mann Iterations Strong Convergence EQUIVALENCE GENERAL CLASS of mapS
在线阅读 下载PDF
Microstrip Low-Pass Elliptic Filter Design Based on Implicit Space Mapping Optimization
10
作者 Saeed Tavakoli Mahdieh Zeinadini Shahram Mohanna 《International Journal of Communications, Network and System Sciences》 2010年第5期462-465,共4页
It is a time-consuming and often iterative procedure to determine design parameters based on fine, accurate but expensive, models. To decrease the number of fine model evaluations, space mapping techniques may be empl... It is a time-consuming and often iterative procedure to determine design parameters based on fine, accurate but expensive, models. To decrease the number of fine model evaluations, space mapping techniques may be employed. In this approach, it is assumed both fine model and coarse, fast but inaccurate, one are available. First, the coarse model is optimized to obtain design parameters satisfying design objectives. Next, auxiliary parameters are calibrated to match coarse and fine models’ responses. Then, the improved coarse model is re-optimized to obtain new design parameters. The design procedure is stopped when a satisfactory solution is reached. In this paper, an implicit space mapping method is used to design a microstrip low-pass elliptic filter. Simulation results show that only two fine model evaluations are sufficient to get satisfactory results. 展开更多
关键词 implicit Space mapping OPTIMIZATION MICROSTRIP LOW-PASS ELLIPTIC FILTER Surrogate Model
在线阅读 下载PDF
A Design Method of Noncoherent Unitary Space-Time Codes
11
作者 Li Peng Qiuping Peng Lingling Yang 《International Journal of Communications, Network and System Sciences》 2011年第7期430-435,共6页
We generalized an constructing method of noncoherent unitary space time codes (N-USTC) over Rayleigh flat fading channels. A family of N-USTCs with T symbol peroids, M transmit and N receive antennas was constructed b... We generalized an constructing method of noncoherent unitary space time codes (N-USTC) over Rayleigh flat fading channels. A family of N-USTCs with T symbol peroids, M transmit and N receive antennas was constructed by the exponential mapping method based on the tangent subspace of the Grassmann manifold. This exponential mapping method can transform the coherent space time codes (C-STC) into the N-USTC on the Grassmann manifold. We infered an universal framework of constructing a C-STC that is designed by using the algebraic number theory and has full rate and full diversity (FRFD) for t symbol periods and same antennas, where M, N, T, t are general positive integer. We discussed the constraint condition that the exponential mapping has only one solution, from which we presented a approach of searching the optimum adjustive factor αopt that can generate an optimum noncoherent codeword. For different code parameters M, N, T, t and the optimum adjustive factor αopt, we gave the simulation results of the several N-USTCs. 展开更多
关键词 NONCOHERENT Uintary space-time CODES (N-USTC) Coherent space-time CODES (C-STC) GRASSMANN Manifold Degree of Freedom Exponenatial map Full Rate and Full Diversity (FRFD)
在线阅读 下载PDF
A novel three-step implicit iteration process for threeΦ-hemicontractive mapping in the intermediate sense
12
作者 Godwin Amechi Okeke Austine Efut Ofem 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2023年第2期248-263,共16页
In this paper,we introduce a three-step composite implicit iteration process for approximating the common fixed point of three uniformly continuous and asymptotically generalizedΦ-hemicontractive mappings in the inte... In this paper,we introduce a three-step composite implicit iteration process for approximating the common fixed point of three uniformly continuous and asymptotically generalizedΦ-hemicontractive mappings in the intermediate sense.We prove that our proposed iteration process converges to the common fixed point of three finite family of asymptotically generalizedΦ-hemicontractive mappings in the intermediate sense.Our results extends,improves and complements several known results in literature. 展开更多
关键词 xed point asymptotically genralizedΦ-hemicontractive mapping in the intermediate sense uniformly continuos implicit iteration process strong convergence Banach spaces
在线阅读 下载PDF
Gravitational Space-Time Curve Generation via Accelerated Charged Particles
13
作者 Edward A. Walker 《Journal of Modern Physics》 2016年第9期863-874,共12页
A force with an acceleration that is equal to multiples greater than the speed of light per unit time is exerted on a cloud of charged particles. The particles are resultantly accelerated to within an infinitesimal fr... A force with an acceleration that is equal to multiples greater than the speed of light per unit time is exerted on a cloud of charged particles. The particles are resultantly accelerated to within an infinitesimal fraction of the speed of light. As the force or acceleration increases, the particles’ velocity asymptotically approaches but never achieves the speed of light obeying relativity. The asymptotic increase in the particles’ velocity toward the speed of light as acceleration increasingly surpasses the speed of light per unit time does not compensate for the momentum value produced on the particles at sub-light velocities. Hence, the particles’ inertial mass value must increase as acceleration increases. This increase in the particles’ inertial mass as the particles are accelerated produce a gravitational field which is believed to occur in the oscillation of quarks achieving velocities close to the speed of light. The increased inertial mass of the density of accelerated charged particles becomes the source mass (or Big “M”) in Newton’s equation for gravitational force. This implies that a space-time curve is generated by the accelerated particles. Thus, it is shown that the acceleration number (or multiple of the speed of light greater than 1 per unit of time) and the number of charged particles in the cloud density are surjectively mapped to points on a differential manifold or space-time curved surface. Two aspects of Einstein’s field equations are used to describe the correspondence between the gravitational field produced by the accelerated particles and the resultant space-time curve. The two aspects are the Schwarzchild metric and the stress energy tensor. Lastly, the possibility of producing a sufficient acceleration or electromagnetic force on the charged particles to produce a gravitational field is shown through the Lorentz force equation. Moreover, it is shown that a sufficient voltage can be generated to produce an acceleration/force on the particles that is multiples greater than the speed of light per unit time thereby generating gravity. 展开更多
关键词 Charged Particles Accelerated Particles Inertial Mass Gravitational Force Einstein’s Field Equations space-time Manifold Schwardchild Metric Stress Energy Tensor Surjective mapping Lorentz Force
在线阅读 下载PDF
ON A CLASS OF GENERALIZED NONLINEAR IMPLICIT QUASIVARIATIONAL INCLUSIONS 被引量:1
14
作者 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第10期1087-1098,共12页
In this paper, a new class of generalized nonlinear implicit quasivariational inclusions involving a set-valued maximal monotone wrapping are studied. A existence theorem of solutions for this class of generalized non... In this paper, a new class of generalized nonlinear implicit quasivariational inclusions involving a set-valued maximal monotone wrapping are studied. A existence theorem of solutions for this class of generalized nonlinear implicit quasivariational inclusions is Proved without compactness assumptions. A new iterative algorithm for finding approximate solutions of the generalized nonlinear implicit quasivariational inclusions is suggested and analysed and the convergence of iterative sequence generated by the new algorithm is also given, As special cases, some known results in this field are also discussed. 展开更多
关键词 generalized nonlinear implicit quasivariational inclusion maximal monotone mapping iterative algorithm Hilbert space
在线阅读 下载PDF
ST-Map:an Interactive Map for Discovering Spatial and Temporal Patterns in Bibliographic Data 被引量:1
15
作者 ZUO Chenyu XU Yifan +1 位作者 DING Lingfang MENG Liqiu 《Journal of Geodesy and Geoinformation Science》 CSCD 2024年第1期3-15,共13页
Getting insight into the spatiotemporal distribution patterns of knowledge innovation is receiving increasing attention from policymakers and economic research organizations.Many studies use bibliometric data to analy... Getting insight into the spatiotemporal distribution patterns of knowledge innovation is receiving increasing attention from policymakers and economic research organizations.Many studies use bibliometric data to analyze the popularity of certain research topics,well-adopted methodologies,influential authors,and the interrelationships among research disciplines.However,the visual exploration of the patterns of research topics with an emphasis on their spatial and temporal distribution remains challenging.This study combined a Space-Time Cube(STC)and a 3D glyph to represent the complex multivariate bibliographic data.We further implemented a visual design by developing an interactive interface.The effectiveness,understandability,and engagement of ST-Map are evaluated by seven experts in geovisualization.The results suggest that it is promising to use three-dimensional visualization to show the overview and on-demand details on a single screen. 展开更多
关键词 space-time cube bibliographic data spatiotemporal analysis user study interactive map
在线阅读 下载PDF
Solar Radiation, Perelman Entropy Mapping, DNA, Viruses etc. 被引量:1
16
作者 Kai W. Wong Peter C. W. Fung Wan K. Chow 《Open Journal of Biophysics》 2020年第2期54-58,共5页
A short note based on the homogeneous 5D space-time topological mappings is extended to cover DNAs of viruses and how the body’s immune system can be enhanced to recognize and remove it.
关键词 5D Homogeneous space-time and Perelman mappings Nitrogenous BASES DNA Viruses CORONAVIRUS Immune System
在线阅读 下载PDF
ON THE PARTIALLY ORDERED METHODS IN THE STUDY OF IMPLICIT VARIATIONAL INEQUALITIES
17
作者 张石生 饶玲 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1994年第8期703-711,共9页
By using the partially ordered methods, the existence problem of solutions formore general implicit varational inequalities of monotone type in Hausdorfftopological linear spaces are considered. As application we uti... By using the partially ordered methods, the existence problem of solutions formore general implicit varational inequalities of monotone type in Hausdorfftopological linear spaces are considered. As application we utilize the results presentedin this paper to study the existence of solutions for Nash equilibrium problem and thesemi-linear elliptic differential equations. 展开更多
关键词 implicit vanational inequality T-monotone mapping strictly T- monotone mapping Nash equilibrium problem
在线阅读 下载PDF
Common New Fixed Point Theorem in Modified Intuitionistic Fuzzy Metric Spaces Using Implicit Relation
18
作者 Saurabh Manro Sumitra   《Applied Mathematics》 2013年第9期27-31,共5页
In this paper, we prove some common fixed point theorems for two pair of compatible and subsequentially continuous mappings satisfying an implicit relation in Modified Intuitionistic fuzzy metric spaces. Consequently,... In this paper, we prove some common fixed point theorems for two pair of compatible and subsequentially continuous mappings satisfying an implicit relation in Modified Intuitionistic fuzzy metric spaces. Consequently, our results improve and sharpen many known common fixed point theorems available in the existing literature of metric fixed point theory. 展开更多
关键词 MODIFIED Intuitionistic Fuzzy Metric Space Compatible mappings Subcompatible mappings Subsequential Continuous mappings Reciprocal CONTINUITY implicit RELATION
在线阅读 下载PDF
Existence and algorithm of solutions for a system of generalized mixed implicit equilibrium problems in Banach spaces
19
作者 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2010年第9期1049-1062,共14页
A new system of generalized mixed implicit equilibrium problems is introduced and studied in Banach spaces. First, the notion of the Yosida proximal mapping for generalized mixed implicit equilibrium problems is intro... A new system of generalized mixed implicit equilibrium problems is introduced and studied in Banach spaces. First, the notion of the Yosida proximal mapping for generalized mixed implicit equilibrium problems is introduced. By using the notion, a system of generalized equation problems is considered, and its equivalence with the system of generalized mixed implicit equilibrium problems is also proved. Next, by applying the system of generalized equation problems, we suggest and analyze an iterative algorithm to compute the approximate solutions of the system of generalized mixed implicit equilibrium problems. The strong convergence of the iterative sequences generated by the algorithm is proved under quite mild conditions. The results are new and unify and generalize some recent results in this field. 展开更多
关键词 generalized mixed implicit equilibrium problem Yosida proximal mapping generalized equation problem iterative algorithm Banach space
在线阅读 下载PDF
Set-Valued Non-Linear Random Implicit Quasivariational Inclusions
20
作者 Salahuddin &emsp Mohammad Kalimuddin Ahmad 《Applied Mathematics》 2013年第3期421-428,共8页
In this paper, we propose iterative algorithms for set valued nonlinear random implicit quasivariational inclusions. We define the related random implicit proximal operator equations and establish an equivalence betwe... In this paper, we propose iterative algorithms for set valued nonlinear random implicit quasivariational inclusions. We define the related random implicit proximal operator equations and establish an equivalence between them. Finally, we prove the existence and convergence of random iterative sequences generated by random iterative algorithms. 展开更多
关键词 Set Valued Nonlinear RANDOM implicit Quasivariational Inclusions RANDOM implicit Proximal Operator Equations Equivalence Relations RANDOM Iterative Algorithms Measurable SPACES Separable Real Hilbert SPACES RANDOM Strongly MONOTONE RANDOM Relaxed MONOTONE RANDOM Lipschitz Continuous mappings
在线阅读 下载PDF
上一页 1 2 12 下一页 到第
使用帮助 返回顶部