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On minimal quasi-injective modules and strong Kasch modules 被引量:2
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作者 朱占敏 张小向 《浙江大学学报(理学版)》 CAS CSCD 北大核心 2009年第3期243-248,253,共7页
设R为一个环,M为一个右R-模.若每个从M的单子模到M的同态都可以开拓为M的自同态,则称M为一个极小拟内射模.若每个单的右R-模都可以嵌入M,则称M为一个强Kasch模.本文研究了这两类模的一些刻画和性质.
关键词 极小拟内射模 强Kasch模 半完全环 半局部环
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Rate of strong consistency of the maximum quasi-likelihood estimator in quasi-likelihood nonlinear models 被引量:2
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作者 XIA Tian KONG Fan-chao 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2008年第4期391-400,共10页
Quasi-likelihood nonlinear models (QLNM) include generalized linear models as a special case. Under some regularity conditions, the rate of the strong consistency of the maximum quasi-likelihood estimation (MQLE) ... Quasi-likelihood nonlinear models (QLNM) include generalized linear models as a special case. Under some regularity conditions, the rate of the strong consistency of the maximum quasi-likelihood estimation (MQLE) is obtained in QLNM. In an important case, this rate is O(n-^1/2(loglogn)^1/2), which is just the rate of LIL of partial sums for i.i.d variables, and thus cannot be improved anymore. 展开更多
关键词 maximum quasi-likelihood estimator quasi-likelihood nonlinear models strong consistency
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Strong Convergence for a Countable Family of Total Quasi-φ-asymptotically Nonexpansive Nonself Mappings in Banach Space 被引量:1
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作者 WANG XIONG-RUI QUAN JING Ji You-qing 《Communications in Mathematical Research》 CSCD 2015年第1期31-39,共9页
The purpose of this article is to introduce a class of total quasi-Ф- asymptotically nonexpansive nonself mappings. Strong convergence theorems for common fixed points of a countable family of total quasi-Ф-asymptot... The purpose of this article is to introduce a class of total quasi-Ф- asymptotically nonexpansive nonself mappings. Strong convergence theorems for common fixed points of a countable family of total quasi-Ф-asymptotically nonexpan- sive mappings are established in the framework of Banach spaces based on modified Halpern and Mann-type iteration algorithm. The main results presented in this article extend and improve the corresponding results of many authors. 展开更多
关键词 strong convergence total quasi-Ф-asymptoticaily nonexpansive nonself generalized projection
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A STRONG CONVERGENCE THEOREM FOR QUASI-EQUILIBRIUM PROBLEMS IN BANACH SPACES
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作者 Mehdi MOHAMMADI G.Zamani ESKANDANI 《Acta Mathematica Scientia》 SCIE CSCD 2022年第1期221-232,共12页
In this paper,we study an extragradient algorithm for approximating solutions of quasi-equilibrium problems in Banach spaces.We prove strong convergence of the sequence generated by the extragradient method to a solut... In this paper,we study an extragradient algorithm for approximating solutions of quasi-equilibrium problems in Banach spaces.We prove strong convergence of the sequence generated by the extragradient method to a solution of the quasi-equilibrium problem. 展开更多
关键词 demiclosed extragradient algorithm quasi-equilibrium problem quasiΦ-nonexpansive mapping strong convergence
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Generalized Quasi-Variational Inequalities on Paracompact Sets
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作者 张昌斌 李岱 《Chinese Quarterly Journal of Mathematics》 CSCD 1998年第3期81-85, ,共5页
Taking advantage of result in [1], this paper studied generalized quasi variational inequalities on paracompact sets, unified and extended corresponding results in [4-6].
关键词 paracompact set generalized quasi variational inequality
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Banach空间中可数算子族的不动点集和广义混合均衡问题的公共解的强收敛性
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作者 倪仁兴 徐亚军 《高校应用数学学报(A辑)》 北大核心 2024年第1期73-88,共16页
在自反Banach空间框架中,提出一类新的收缩投影算法,来逼近一闭Bregman拟渐近非扩张可数算子族的不动点集和广义混合均衡问题的公共解,建立了一闭Bregman拟渐近非扩张可数算子族的不动点集和广义混合均衡问题的公共解的强收敛性结果,并... 在自反Banach空间框架中,提出一类新的收缩投影算法,来逼近一闭Bregman拟渐近非扩张可数算子族的不动点集和广义混合均衡问题的公共解,建立了一闭Bregman拟渐近非扩张可数算子族的不动点集和广义混合均衡问题的公共解的强收敛性结果,并用一数值例子来支撑文中所得的结果.无论算子族从有限个到可数个,还是算子从Bregman相对非扩张到Bregman拟渐近非扩张等方面,均对Jantakarn K和Kaewcharoen A(2021)的结果进行了的拓展和补充. 展开更多
关键词 广义混合均衡问题 Bregman相对非扩张映像 Bregman拟渐进非扩张映射 收缩投影法 强收敛性
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强夯动荷载作用方向对黄土边坡稳定性的影响分析 被引量:1
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作者 吴丙权 倪万魁 +2 位作者 拓文鑫 任思远 陈军廷 《振动与冲击》 EI CSCD 北大核心 2024年第1期283-289,共7页
为进一步研究强夯对周边黄土边坡稳定性的影响,采用极限平衡圆弧条分法对强夯作用下的边坡安全系数进行推导计算。结合工程实例,使用TC-4850爆破测振仪对现场监测点进行加速度测试。考虑高程差和测点距离的共同影响,采用MATLAB编程对现... 为进一步研究强夯对周边黄土边坡稳定性的影响,采用极限平衡圆弧条分法对强夯作用下的边坡安全系数进行推导计算。结合工程实例,使用TC-4850爆破测振仪对现场监测点进行加速度测试。考虑高程差和测点距离的共同影响,采用MATLAB编程对现场数据进行多元回归分析,求出强夯作用下边坡质点振动加速度解析式。在求得最小安全系数的基础上,研究不同强夯动荷载方向对黄土边坡稳定性的影响。研究结果表明:在相同荷载作用下,强夯动荷载方向与水平轴正方向夹角为0°、45°、60°、270°、315°、330°、360°时,安全系数均小于等于1.00,且随着拟静力系数不断增大,安全系数越来越小。强夯动荷载方向与水平轴正方向夹角为90°、135°、150°、180°、225°、240°时,安全系数均大于1.05。随着拟静力系数不断增大,安全系数也随之增大。该方法简单易行,便于计算,可用于黄土边坡实际工程。 展开更多
关键词 极限平衡 强夯动荷载方向 安全系数 拟静力系数
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强b-距离空间中的集值拟压缩不动点定理
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作者 吴桐 贺飞 《应用数学》 北大核心 2024年第4期996-1003,共8页
本文研究了强b-距离空间中的集值拟压缩不动点定理.利用一个新的引理,在强b-距离空间的框架中建立了集值拟压缩不动点定理.该定理将距离空间中LU等人(2022)的结果推广了到强b-距离空间,并且改进了李淑方(2023)在b-距离空间的结_果.特别... 本文研究了强b-距离空间中的集值拟压缩不动点定理.利用一个新的引理,在强b-距离空间的框架中建立了集值拟压缩不动点定理.该定理将距离空间中LU等人(2022)的结果推广了到强b-距离空间,并且改进了李淑方(2023)在b-距离空间的结_果.特别地,当1≤s≤1+√5/2时,我们将压缩系数范围扩大为[0,1/3√1-2s);当s>1+√5/2时,我们将压缩系数~范围扩大为[0,1/√1+s). 展开更多
关键词 HAUSDORFF距离 强b-距离空间 集值拟压缩 不动点定理
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强b-距离空间中的集值拟压缩型不动点定理
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作者 吴桐 贺飞 《内蒙古大学学报(自然科学版)》 CAS 2024年第5期478-482,共5页
在强b-距离空间的框架中建立了集值拟压缩型不动点定理,该定理将距离空间中Lu等人的结果完全地推广到了强b-距离空间,同时改进了李淑方在b-距离空间的结果。
关键词 HAUSDORFF距离 强b-距离空间 集值拟压缩型 不动点定理
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基于改进L-P法的块系岩体摆型波与准共振机理分析
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作者 徐天涵 崔海涛 +3 位作者 邓勇 邢灏喆 李超 纪玉国 《陆军工程大学学报》 2024年第5期1-10,共10页
块系岩体中摆型波具有非线性特征,导致难以解释其频谱特征及准共振现象机理。针对此问题,建立了考虑三次项的摆型波非线性振动模型,利用改进的L-P法与振型叠加法,求得多自由度强非线性振动的近似解析解,一定程度上解释了试验观测到块系... 块系岩体中摆型波具有非线性特征,导致难以解释其频谱特征及准共振现象机理。针对此问题,建立了考虑三次项的摆型波非线性振动模型,利用改进的L-P法与振型叠加法,求得多自由度强非线性振动的近似解析解,一定程度上解释了试验观测到块系岩体摆型波的非线性现象机理。结果表明,块体系统振动频率可表示为输入能量的高次多项式,随能量增大振动频率呈非单调变化;各谐振频率之间的比例与系统构造有关,近似满足√2的整数倍比例关系。通过建立摆型波的层次构造模型,得出准共振是摆型波在不同尺度块体之间跃迁的标志。 展开更多
关键词 摆型波 强非线性 改进L-P法 块系岩体 准共振
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川南一次准正压类强对流天气的综合分析 被引量:1
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作者 陈文龙 竹利 林璐 《西华师范大学学报(自然科学版)》 2024年第2期181-189,共9页
就四川而言,相较于斜压大气中的强对流天气,准正压大气中的强对流天气出现概率低,突发性更强,监测和预报难度更大。本文基于气象站观测资料、雷达组合反射率拼图、气象卫星的TBB资料以及NCEP和ERA5再分析资料,运用天气学、卫星气象学和... 就四川而言,相较于斜压大气中的强对流天气,准正压大气中的强对流天气出现概率低,突发性更强,监测和预报难度更大。本文基于气象站观测资料、雷达组合反射率拼图、气象卫星的TBB资料以及NCEP和ERA5再分析资料,运用天气学、卫星气象学和雷达气象学方法,对2022年8月5日四川南部地区发生的准正压类强对流天气进行了综合分析。结果表明:本次强对流天气以雷暴大风和短时强降雨为主,持续时间约2 h,其间气象要素变化剧烈;主要影响系统为高层的南亚高压、中低层的季风低压倒槽和地面热低压;高CAPE值、“上干下湿”的湿度层结、弱垂直风切变、低层辐合、高层辐散和深厚的上升运动是强对流天气出现的有利环境条件;低压倒槽前的云带在川南演变为对流云团,多中心带状雷暴群的NE段在川南演变为团状雷暴群,雷暴大风和短时强降雨与冷云中心、高TBB梯度、高反射率梯度、反射率大小及其维持时间存在较好的对应关系。 展开更多
关键词 准正压大气 倒槽 对流不稳定能量 雷暴群 强反射率
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非拓扑向量空间的拟拓扑向量空间
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作者 杨忠强 郑秋楠 《闽南师范大学学报(自然科学版)》 2024年第2期87-93,共7页
拟拓扑向量空间是在向量空间赋予一个拓扑使其满足数乘联合连续,加法分离变量连续的空间,给出生成非拓扑向量空间的拟拓扑向量空间的方法,由此可以得到仿紧的拟拓扑向量空间但不是拓扑向量空间.
关键词 拓扑向量空间 拟拓扑向量空间 仿紧
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混合Bregman投影算法在Banach空间中分裂不动点问题的强收敛性
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作者 倪仁兴 徐亚军 《绍兴文理学院学报》 2024年第2期44-57,共14页
在p-一致凸且一致光滑的Banach空间中,利用Bregman投影,构造一新的混合投影迭代算法,逼近Bregman拟严格伪压缩映射不动点集和分裂可行性问题的公共解.目的是将2017年Chen J Z,Hu H Y和Ceng L C的研究结果中的迭代系数α_(n)须满足0<c... 在p-一致凸且一致光滑的Banach空间中,利用Bregman投影,构造一新的混合投影迭代算法,逼近Bregman拟严格伪压缩映射不动点集和分裂可行性问题的公共解.目的是将2017年Chen J Z,Hu H Y和Ceng L C的研究结果中的迭代系数α_(n)须满足0<c≤a_(n)≤d<1证明对α_(n)≡1或α_(n)≡0时亦成立.所得的结果是对2017年Chen J Z,Hu H Y和Ceng L C相应结果的拓展和补充. 展开更多
关键词 分裂可行性问题 Bregman拟严格伪压缩映射 Bregman投影 强收敛性
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A New Hybrid Algorithm and Its Numerical Realization for a Quasi-nonexpansive Mapping 被引量:7
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作者 GAO XING-HUI MA LE-RONG Ji You-qing 《Communications in Mathematical Research》 CSCD 2017年第4期340-346,共7页
The purpose of this article is to propose a new hybrid projection method for a quasi-nonexpansive mapping. The strong convergence of the algorithm is proved in real Hilbert spaces. A numerical experiment is also inclu... The purpose of this article is to propose a new hybrid projection method for a quasi-nonexpansive mapping. The strong convergence of the algorithm is proved in real Hilbert spaces. A numerical experiment is also included to explain the effectiveness of the proposed methods. The results of this paper are interesting extensions of those known results. 展开更多
关键词 quasi-nonexpansive mapping hybrid algorithm strong convergence Hilbert space
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Strong Law of Large Numbers under an Upper Probability 被引量:1
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作者 Xiaoyan Chen 《Applied Mathematics》 2012年第12期2056-2062,共7页
Strong law of large numbers is a fundamental theory in probability and statistics. When the measure tool is nonadditive, this law is very different from additive case. In 2010 Chen investigated the strong law of large... Strong law of large numbers is a fundamental theory in probability and statistics. When the measure tool is nonadditive, this law is very different from additive case. In 2010 Chen investigated the strong law of large numbers under upper probabilityVby assumingVis continuous. This assumption is very strong. Upper probabilities may not be continuous. In this paper we prove the strong law of large numbers for an upper probability without the continuity assumption whereby random variables are quasi-continuous and the upper probability is generated by a weakly compact family of probabilities on a complete and separable metric sample space. 展开更多
关键词 strong Law of Large NUMBERS UPPER PROBABILITY WEAKLY Compact INDEPENDENCE quasi-CONTINUOUS
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VISCOSITY APPROXIMATION METHODS FOR THE SPLIT EQUALITY COMMON FIXED POINT PROBLEM OF QUASI-NONEXPANSIVE OPERATORS 被引量:1
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作者 赵静 王盛楠 《Acta Mathematica Scientia》 SCIE CSCD 2016年第5期1474-1486,共13页
Let H;, H;, H;be real Hilbert spaces, let A : H;→ H;, B : H;→ H;be two bounded linear operators. The split equality common fixed point problem(SECFP) in the infinite-dimensional Hilbert spaces introduced by Moudaf... Let H;, H;, H;be real Hilbert spaces, let A : H;→ H;, B : H;→ H;be two bounded linear operators. The split equality common fixed point problem(SECFP) in the infinite-dimensional Hilbert spaces introduced by Moudafi(Alternating CQ-algorithm for convex feasibility and split fixed-point problems. Journal of Nonlinear and Convex Analysis)is to find x ∈ F(U), y ∈ F(T) such that Ax = By,(1)where U : H;→ H;and T : H;→ H;are two nonlinear operators with nonempty fixed point sets F(U) = {x ∈ H;: Ux = x} and F(T) = {x ∈ H;: Tx = x}. Note that,by taking B = I and H;= H;in(1), we recover the split fixed point problem originally introduced in Censor and Segal. Recently, Moudafi introduced alternating CQ-algorithms and simultaneous iterative algorithms with weak convergence for the SECFP(1) of firmly quasi-nonexpansive operators. In this paper, we introduce two viscosity iterative algorithms for the SECFP(1) governed by the general class of quasi-nonexpansive operators. We prove the strong convergence of algorithms. Our results improve and extend previously discussed related problems and algorithms. 展开更多
关键词 split equality common fixed point problems quasi-nonexpansive operator strong convergence viscosity iterative algorithms Hilbert space
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Rules for Identifying the Magic Angular Momenta of Quantum Dots in a Strong Magnetic Field
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作者 RUAN Wen-Ying LI Quan +2 位作者 CHEN Guo-Sen HE Hao-Pei PAN Yu-Bin 《Chinese Physics Letters》 SCIE CAS CSCD 2000年第10期752-754,共3页
In quantum dots under a strong magnetic field, all the electrons occupy only the lowest Landau level and are spin polarized. When an orbiting electron is regarded as a quasiparticle, the interaction between a pair of ... In quantum dots under a strong magnetic field, all the electrons occupy only the lowest Landau level and are spin polarized. When an orbiting electron is regarded as a quasiparticle, the interaction between a pair of quasiparticles is a short range attraction matched to a long range repulsive tail. Magic numbers of angular momentum are justthose where the quasiparticles can be arranged into compact clusters with their sizes determined by the saturation of the short range attraction. 展开更多
关键词 MAGIC strong quasi
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Strong Convergence of an Implicit Iteration Process for a Finite Family of Asymptotically Ф-pseudocontractive Mappings 被引量:1
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作者 王学武 《Northeastern Mathematical Journal》 CSCD 2008年第4期300-310,共11页
Strong convergence theorems for approximation of common fixed points of asymptotically Ф-quasi-pseudocontractive mappings and asymptotically C-strictly- pseudocontractive mappings are proved in real Banach spaces by ... Strong convergence theorems for approximation of common fixed points of asymptotically Ф-quasi-pseudocontractive mappings and asymptotically C-strictly- pseudocontractive mappings are proved in real Banach spaces by using a new composite implicit iteration scheme with errors. The results presented in this paper extend and improve the main results of Sun, Gu and Osilike published on J. Math. Anal. Appl. 展开更多
关键词 asymptotically Ф-quasi-pseudocontractive asymptotically Ф-strictly- pseudocontractive implicit iteration scheme strong approximation common fixed point
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PREDICTOR-CORRECTOR ALGORITHMS FOR SOLVING GENERALIZED MIXED IMPLICIT QUASI-EQUILIBRIUM PROBLEMS
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作者 丁协平 林炎诚 姚任之 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2006年第9期1157-1164,共8页
A new class of generalized mixed implicit quasi-equilibrium problems (GMIQEP) with four-functions is introduced and studied. The new class of equilibrium problems includes many known generalized equilibrium problems... A new class of generalized mixed implicit quasi-equilibrium problems (GMIQEP) with four-functions is introduced and studied. The new class of equilibrium problems includes many known generalized equilibrium problems and generalized mixed implicit quasi-variational inequality problems as many special cases. By employing the auxiliary principle technique, some predictor-corrector iterative algorithms for solving the GMIQEP are suggested and analyzed. The convergence of the suggested algorithm only requires the continuity and the partially relaxed implicit strong monotonicity of the mappings 展开更多
关键词 generalized mixed implicit quasi-equilibrium problem auxiliary variational inequality predictor-corrector iterative algorithms partially relaxed implicit strong monotonicity
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Common Fixed Point Iterations of Generalized Asymptotically Quasi-Nonexpansive Mappings in Hyperbolic Spaces
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作者 A. R. Khan H. Fukhar-ud-din 《Journal of Applied Mathematics and Physics》 2014年第5期170-175,共6页
We introduce a general iterative method for a finite family of generalized asymptotically quasi- nonexpansive mappings in a hyperbolic space and study its strong convergence. The new iterative method includes multi-st... We introduce a general iterative method for a finite family of generalized asymptotically quasi- nonexpansive mappings in a hyperbolic space and study its strong convergence. The new iterative method includes multi-step iterative method of Khan et al. [1] as a special case. Our results are new in hyperbolic spaces and generalize many known results in Banach spaces and CAT(0) spaces, simultaneously. 展开更多
关键词 HYPERBOLIC Space General ITERATIVE Method Generalized ASYMPTOTICALLY quasi-Nonexpansive Mapping Common Fixed Point strong Convergence
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