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EXPONENTIALLY BOUNDED C-SEMIGROUP AND INTEGRATED SEMIGROUP WITH NONDENSELY DEFINED GENERATORS I: APPROXIMATION: 被引量:5
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作者 郑权 雷岩松 《Acta Mathematica Scientia》 SCIE CSCD 1993年第3期251-260,共10页
In this paper, by Laplace transform version of the Trotter-Kato approximation theorem and the integrated C-semigroup introduced by Myadera, the authors obtained some Trotter-Kato approximation theorems on exponentiall... In this paper, by Laplace transform version of the Trotter-Kato approximation theorem and the integrated C-semigroup introduced by Myadera, the authors obtained some Trotter-Kato approximation theorems on exponentially bounded C-semigroups, where the range of C (and so the domain of the generator) may not be dense. The authors deduced the corresponding results on exponentially bounded integrated semigroups with nondensely generators. The results of this paper extended and perfected the results given by Lizama, Park and Zheng. 展开更多
关键词 APPROXIMATION exponentialLY boundED C-SEMIGROUP AND INTEGRATED SEMIGROUP WITH NONDENSELY DEFINED GENERATORS I
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Predefined Exponential Basis Set for Half-Bounded Multi Domain Spectral Method 被引量:1
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作者 Fahhad Alharbi 《Applied Mathematics》 2010年第3期146-152,共7页
A non-orthogonal predefined exponential basis set is used to handle half-bounded domains in multi domain spectral method (MDSM). This approach works extremely well for real-valued semi-infinite differential problems. ... A non-orthogonal predefined exponential basis set is used to handle half-bounded domains in multi domain spectral method (MDSM). This approach works extremely well for real-valued semi-infinite differential problems. It spans simultaneously wide range of exponential decay rates with multi scaling and does not suffer from zero crossing. These two conditions are necessary for many physical problems. For comparison, the method is used to solve different problems and compared with analytical and published results. The comparison exhibits the strengths and accuracy of the presented basis set. 展开更多
关键词 Multi-Domain Spectral METHOD MESHFREE Numerical METHOD Non-Orthogonal Predefined exponential Basis Set Half-bounded Domain exponential Decay Quantum Wells Optical Waveguide
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Approximation Theorems for Exponentially Bounded <i>a</i>-Times Integrated Cosine Function
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作者 Lufeng Ling 《Advances in Pure Mathematics》 2014年第11期580-584,共5页
In this paper, based on the theories of α-times Integrated Cosine Function, we discuss the approximation theorem for α-times Integrated Cosine Function and conclude the approximation theorem of exponentially bounded... In this paper, based on the theories of α-times Integrated Cosine Function, we discuss the approximation theorem for α-times Integrated Cosine Function and conclude the approximation theorem of exponentially bounded α-times Integrated Cosine Function by the approximation theorem of n-times integrated semigroups. If the semigroups are equicontinuous at each point ? , we give different methods to prove the theorem. 展开更多
关键词 α-Times INTEGRATED COSINE Function exponentialLY boundED Approximation
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Unified treatment of one-range addition theorems for integer and non-integer n-STO, -GTO and -generalized exponential type orbitals with hyperbolic cosine in position, momentum and four-dimensional spaces
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作者 I. I. Guseinov 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第9期176-178,共3页
Simpler formulas are derived for one-range addition theorems for the integer and noninteger n generalized ex- ponential type orbitals, momentum space orbitals, and hyperspherical harmonics with hyperbolic cosine (GET... Simpler formulas are derived for one-range addition theorems for the integer and noninteger n generalized ex- ponential type orbitals, momentum space orbitals, and hyperspherical harmonics with hyperbolic cosine (GETO HC, GMSO HC, and GHSH HC) in position, momentum and four-dimensional spaces, respectively. The final results are expressed in terms of one-range addition theorems of complete orthonormal sets of Ca-exponential type orbitals, Ca- momentum space orbitals and za-hyperspherical harmonics. We notice that the one-range addition theorems for integer and noninteger n-Slater type orbitals and Gaussian type orbitals in position, momentum and four dimensional spaces are special cases of GETO HC, GMSO HC, and GHSH HC. The theorems presented can be useful in the accurate study of the electronic structure of atomic and molecular systems. 展开更多
关键词 electronic structure generalized exponential type orbitals one-range addition theorems Hartree-Fock-Roothaan equations
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Exponential Dichotomy and Eberlein-Weak Almost Periodic Solutions 被引量:1
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作者 Elhadi Ait Dads Samir Fatajou Lahcen Lhachimi 《Applied Mathematics》 2012年第9期969-975,共7页
We give sufficient conditions ensuring the existence and uniqueness of an Eberlein-weakly almost periodic solution to the following linear equation dx/dt(t) = A(t)x(t) + f(t) in a Banach space X, where (A(t)) t ∈□ i... We give sufficient conditions ensuring the existence and uniqueness of an Eberlein-weakly almost periodic solution to the following linear equation dx/dt(t) = A(t)x(t) + f(t) in a Banach space X, where (A(t)) t ∈□ is a family of infinitesimal generators such that for all t ∈□, A(t + T) = A(t) for some T > 0, for which the homogeneuous linear equation dx/dt(t) = A(t)x(t) is well posed, stable and has an exponential dichotomy, and f:□ →X is Eberlein-weakly amost periodic. 展开更多
关键词 bounded Solutions ALMOST PERIODIC and Eberlein WEAK ALMOST PERIODIC Functions exponential DICHOTOMY Linear Differential Equations
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NEW EXPONENTIAL BIDIRECTIONAL ASSOCIATIVE MEMORY
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作者 Wang Baoyun Zhang Qing He Zhenya (Department of Radio Engineering, Southeast University, Nanjing 210096) 《Journal of Electronics(China)》 1996年第1期56-60,共5页
A new exponential bidirectional associative memory model is introduced. It offers an even better recall performance than the modified exponential bidirectional associative memory (MEBAM). Only a little complexity of r... A new exponential bidirectional associative memory model is introduced. It offers an even better recall performance than the modified exponential bidirectional associative memory (MEBAM). Only a little complexity of realization is spent for the improvement. 展开更多
关键词 exponential ASSOCIATIVE MEMORY STABILITY DYNAMIC range
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Exponential Stability for the Compressible Navier-Stokes Equations
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作者 QIN Yu-ming WANG Xiu-qin 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2005年第3期296-300,共5页
We establish the exponential stability of global solutions and C0-semigroup for the compressible Navier.Stokes equations of a viscous polytropic ideal gas in both bounded domain in R^1 and bounded annular domains in R... We establish the exponential stability of global solutions and C0-semigroup for the compressible Navier.Stokes equations of a viscous polytropic ideal gas in both bounded domain in R^1 and bounded annular domains in R^n (n=2,3). 展开更多
关键词 C0-SEMIGROUP exponentially stable bounded annular domains
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The Exponential Stability of the Solution of aParallel System withWarm-standby
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作者 Xiaoshuang Han Ming Fang 《控制工程期刊(中英文版)》 2016年第1期35-41,共7页
关键词 平行系统 稳定性 待机 BANACH 操作符 动态解 学习 空格
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一类本原双色有向图的指数界
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作者 罗美金 卢钰松 《北华大学学报(自然科学版)》 CAS 2024年第5期561-567,共7页
对一类相对特殊的双色本原有向图给出了本原条件,结合圈矩阵给出了本原指数的上下界,并刻画了取得指数上下界时所对应的极图。
关键词 双色有向图 本原指数 指数界(指数范围)
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指数有界n阶α次积分C群的紧性
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作者 赵华新 刘娟娟 贺凯丽 《沈阳大学学报(自然科学版)》 CAS 2024年第3期267-272,共6页
利用指数有界n阶α次积分C群及其次生成元的定义,并借助经典算子理论的研究方法,给出了指数有界n阶α次积分C群紧的定义,从而推导出指数有界n阶α次积分C群的紧性的一些性质。
关键词 指数有界 n阶α次积分C群 次生成元 紧性 拓扑连续
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指数型加权Bergman空间上Hankel算子的有界性与紧性
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作者 林殷淇 夏锦 《四川轻化工大学学报(自然科学版)》 CAS 2024年第4期92-100,共9页
令φ为一类指数型权,对于单位圆盘D上由指数型权诱导的加权Bergman空间A_(φ)^(p)=L_(φ)^(p)∩H(D),其中H(D)为单位圆盘D上全体全纯函数所成的空间,其上的Hankel算子记作H_(f)(g)=(Id-P)(fg)。本文介绍了指数型权的基本性质以及证明有... 令φ为一类指数型权,对于单位圆盘D上由指数型权诱导的加权Bergman空间A_(φ)^(p)=L_(φ)^(p)∩H(D),其中H(D)为单位圆盘D上全体全纯函数所成的空间,其上的Hankel算子记作H_(f)(g)=(Id-P)(fg)。本文介绍了指数型权的基本性质以及证明有界性与紧性所需要的相关定理与引理,并对空间上的再生核函数以及∂ˉ方程的解做出了某些积分估计和范数估计。然后利用前面积分估计与范数估计的结果得出:当1≤p≤q<∞时,分别得到了Hankel算子H_(f)从A_(φ)^(p)到Lebesgue空间L_(φ)^(q)的有界性与紧性的等价刻画;当1≤q<p<∞时,Hankel算子H_(f)从A_(φ)^(p)到Lebesgue空间L_(φ)^(q)的有界性与紧性是彼此等价的。 展开更多
关键词 指数型加权Bergman空间 HANKEL算子 有界性 紧性
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指数有界双参数n阶α次积分C群的紧性
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作者 刘娟娟 赵华新 贺凯丽 《湖北大学学报(自然科学版)》 CAS 2024年第4期574-578,共5页
利用指数有界双参数n阶α次积分C群及其次生成元的定义,并借助经典算子理论的研究方法,给出双参数n阶α次积分C群紧的定义,得到指数有界双参数n阶α次积分C群的紧的性质。
关键词 指数有界 双参数n阶α次积分C群 次生成元 紧性
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加指数权Lebesgue空间超齐次核积分算子搭配参数最佳的充要条件
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作者 洪勇 《浙江大学学报(理学版)》 CAS CSCD 北大核心 2024年第5期586-592,共7页
引入超齐次函数概念,将齐次核、拟齐次核和若干非齐次核统一为超齐次核。利用权系数方法,讨论了加指数权Lebesgue空间超齐次核积分算子的有界性与算子范数问题,得到了有界算子搭配参数最佳的充分必要条件,解决了算子范数的计算问题,并... 引入超齐次函数概念,将齐次核、拟齐次核和若干非齐次核统一为超齐次核。利用权系数方法,讨论了加指数权Lebesgue空间超齐次核积分算子的有界性与算子范数问题,得到了有界算子搭配参数最佳的充分必要条件,解决了算子范数的计算问题,并给出了一些应用特例。 展开更多
关键词 超齐次核 积分算子 HILBERT型积分不等式 加指数权Lebesgue空间 最佳搭配参数 有界算子 算子范数
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Modulation of neuronal dynamic range using two different adaptation mechanisms 被引量:1
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作者 Lei Wang Ye Wang +1 位作者 Wen-long Fu Li-hong Cao 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第3期447-451,共5页
The capability of neurons to discriminate between intensity of external stimulus is measured by its dynamic range.A larger dynamic range indicates a greater probability of neuronal survival.In this study,the potential... The capability of neurons to discriminate between intensity of external stimulus is measured by its dynamic range.A larger dynamic range indicates a greater probability of neuronal survival.In this study,the potential roles of adaptation mechanisms(ion currents) in modulating neuronal dynamic range were numerically investigated.Based on the adaptive exponential integrate-and-fire model,which includes two different adaptation mechanisms,i.e.subthreshold and suprathreshold(spike-triggered) adaptation,our results reveal that the two adaptation mechanisms exhibit rather different roles in regulating neuronal dynamic range.Specifically,subthreshold adaptation acts as a negative factor that observably decreases the neuronal dynamic range,while suprathreshold adaptation has little influence on the neuronal dynamic range.Moreover,when stochastic noise was introduced into the adaptation mechanisms,the dynamic range was apparently enhanced,regardless of what state the neuron was in,e.g.adaptive or non-adaptive.Our model results suggested that the neuronal dynamic range can be differentially modulated by different adaptation mechanisms.Additionally,noise was a non-ignorable factor,which could effectively modulate the neuronal dynamic range. 展开更多
关键词 nerve regeneration dynamic range subthreshold adaptation suprathreshold adaptation noise NEURON adaptive exponential integrate-and-fire model ion currents computer simulation neural regeneration
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Impulsive stabilization of a class of nonlinear system with bounded gain error
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作者 马铁东 赵飞亚 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第12期103-108,共6页
Considering mechanical limitation or device restriction in practical application, this paper investigates impulsive stabilization of nonlinear systems with impulsive gain error. Compared with the existing impulsive an... Considering mechanical limitation or device restriction in practical application, this paper investigates impulsive stabilization of nonlinear systems with impulsive gain error. Compared with the existing impulsive analytical approaches,the proposed impulsive control method is more practically applicable, which includes control gain error with an acceptable boundary. A sufficient criterion for global exponential stability of an impulsive control system is derived, which relaxes the condition for precise impulsive gain efficiently. The effectiveness of the proposed method is confirmed by theoretical analysis and numerical simulation based on Chua's circuit. 展开更多
关键词 bounded gain error impulsive control exponential stability Chua's circuit
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指数有界双参数n阶α次积分C半群的逼近 被引量:1
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作者 白洋 赵华新 《西南民族大学学报(自然科学版)》 CAS 2023年第3期334-340,共7页
逼近是算子半群理论中重要的组成部分之一.利用经典算子半群理论中的方法,并结合指数有界双参数n阶α次积分C半群的概念和Laplace型逆变换的表达式得到了指数有界双参数n阶α次积分C半群的逼近:在一定条件下,当T_(n)(t,s)x逼近于T(t,s)x... 逼近是算子半群理论中重要的组成部分之一.利用经典算子半群理论中的方法,并结合指数有界双参数n阶α次积分C半群的概念和Laplace型逆变换的表达式得到了指数有界双参数n阶α次积分C半群的逼近:在一定条件下,当T_(n)(t,s)x逼近于T(t,s)x,则有■逼近于■,反之也成立. 展开更多
关键词 指数有界双参数n阶α次积分C半群 次生成元 LAPLACE变换 逼近
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Exponential Bounds for Ruin Probability in Two Moving Average Risk Models with Constant Interest Rate 被引量:3
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作者 Ding Jun YAO Rong Ming WANG 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2008年第2期319-328,共10页
The authors consider two discrete-time insurance risk models. Two moving average risk models are introduced to model the surplus process, and the probabilities of ruin are examined in models with a constant interest f... The authors consider two discrete-time insurance risk models. Two moving average risk models are introduced to model the surplus process, and the probabilities of ruin are examined in models with a constant interest force. Exponential bounds for ruin probabilities of an infinite time horizon are derived by the martingale method. 展开更多
关键词 ruin probability moving average model rate of interest exponential bound MARTINGALE
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THE EXPONENTIAL BOUND OF THE SURVIVAL FUNCTION ESTIMAATOR FOR RANDOMLY TRUNCATED AND CENSORED DATA
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作者 ZHU Yujie(Huzhou Teacher’s Collage, Huzhou 313000, China) 《Systems Science and Mathematical Sciences》 SCIE EI CSCD 1996年第2期175-181,共7页
THEEXPONENTIALBOUNDOFTHESURVIVALFUNCTIONESTIMAATORFORRANDOMLYTRUNCATEDANDCENSOREDDATAZHUYujie(HuzhouTeacher'... THEEXPONENTIALBOUNDOFTHESURVIVALFUNCTIONESTIMAATORFORRANDOMLYTRUNCATEDANDCENSOREDDATAZHUYujie(HuzhouTeacher'sCollage,Huzhou31... 展开更多
关键词 exponential bound product-limit estimator LEFT TRUNCATION right censorship.
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A Perturbation Theorem for Exponentially Bounded C-semigroups
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作者 姚景齐 《Chinese Science Bulletin》 SCIE EI CAS 1994年第21期1770-1773,共4页
Let (X;‖ ‖) be a Banach space. By B(X) we denote the set of all bounded linear operators in X. Let C∈B(X) be injective.A strongly continuous family of bounded operators {S(t); t≥0} is called an exponentially bound... Let (X;‖ ‖) be a Banach space. By B(X) we denote the set of all bounded linear operators in X. Let C∈B(X) be injective.A strongly continuous family of bounded operators {S(t); t≥0} is called an exponentially bounded C-semigroup (hereinafter abbrevi- 展开更多
关键词 exponentialLY bounded·C-semigroup CO-SEMIGROUP PERTURBATION for semigroup.
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Exponential Time Differencing Schemes for the Peng-Robinson Equation of State with Preservation of Maximum Bound Principle
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作者 Qiumei Huang Kun Jiang Jingwei Li 《Advances in Applied Mathematics and Mechanics》 SCIE 2022年第2期494-527,共34页
The Peng-Robison equation of state,one of the most extensively applied equations of state in the petroleum industry and chemical engineering,has an excel-lent appearance in predicting the thermodynamic properties of a... The Peng-Robison equation of state,one of the most extensively applied equations of state in the petroleum industry and chemical engineering,has an excel-lent appearance in predicting the thermodynamic properties of a wide variety of ma-terials.It has been a great challenge on how to design numerical schemes with preser-vation of mass conservation and energy dissipation law.Based on the exponential time difference combined with the stabilizing technique and added Lagrange multi-plier enforcing the mass conservation,we develop the efficientfirst-and second-order numerical schemes with preservation of maximum bound principle(MBP)to solve the single-component two-phase diffuse interface model with Peng-Robison equation of state.Convergence analyses as well as energy stability are also proven.Several two-dimensional and three-dimensional experiments are performed to verify these theo-retical results. 展开更多
关键词 Peng-Robinson equation of state diffuse interface model maximum bound principle exponential time differencing Lagrange multiplier
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