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EXISTENCE OF SOLUTIONS FORP ARABOLIC TYPE EVOLUTION DIFFERENTIAL INCLUSIONS AND THE PROPERTY OF THE SOLUTION SET
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作者 王志华 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第3期328-331,共4页
In this paper, parabolic type differential inclusions with time dependent ape considered and this problem is related to the study of the nonlinear distributed parameter central systems. An existence theorem of mild-so... In this paper, parabolic type differential inclusions with time dependent ape considered and this problem is related to the study of the nonlinear distributed parameter central systems. An existence theorem of mild-solutions is proved, and a property of the solution set is given. The directions and the results by J.P. Aubin et al. are generalized and improved. 展开更多
关键词 evolution operator set-valued map differential inclusion mild-solution fixed-point theorem
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The Properties Analysis for Generalized Abstract Evolutionary Algorithm
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作者 XUE Ming-zhi MA Yun-ling 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2006年第2期255-260,共6页
There has been a growing interest in mathematical models to character the evolutionary algorithms. The best-known one of such models is the axiomatic model called the abstract evolutionary algorithm (AEA), which uni... There has been a growing interest in mathematical models to character the evolutionary algorithms. The best-known one of such models is the axiomatic model called the abstract evolutionary algorithm (AEA), which unifies most of the currently known evolutionary algorithms and describes the evolution as an abstract stochastic process composed of two fundamental abstract operators: abstract selection and evolution operators. In this paper, we first introduce the definitions of the generalized abstract selection and evolution operators. Then we discuss the characterization of some parameters related to generalized abstract selection and evolution operators. Based on these operators, we finally give the strong convergence of the generalized abstract evolutionary algorithm. The present work provides a big step toward the establishment of a unified theory of evolutionary computation. 展开更多
关键词 selection operators evolution operators evolutionary algorithm strong convergence
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Evolution and Generation of Dynamics of Two-Mode Squeezed States of Time-Dependent Coupled Boson System
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作者 ZHANG Xue ZHENG Tai-Yu ZHENG Li 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第10期955-960,共6页
The system of the Hamiltonian involving a driving part,a single mode part,and a two-mode squeezedone and a two-mode coupled one is discussed using the Lewis-Riesenfeld invariant theory.The time evolution operatoris ob... The system of the Hamiltonian involving a driving part,a single mode part,and a two-mode squeezedone and a two-mode coupled one is discussed using the Lewis-Riesenfeld invariant theory.The time evolution operatoris obtained.When the initial state is a coherent state,the quantum fluctuation of the system is calculated,and it isdependent on the squeezed part and the two-mode coupled part,but not dependent on the driving one. 展开更多
关键词 two-mode squeezed states Lewis Riesenfeld invariant theory time evolution operator
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Solving chemical dynamic optimization problems with ranking-based differential evolution algorithms 被引量:3
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作者 Xu Chen Wenli Du Feng Qian 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第11期1600-1608,共9页
Dynamic optimization problems(DOPs) described by differential equations are often encountered in chemical engineering. Deterministic techniques based on mathematic programming become invalid when the models are non-di... Dynamic optimization problems(DOPs) described by differential equations are often encountered in chemical engineering. Deterministic techniques based on mathematic programming become invalid when the models are non-differentiable or explicit mathematical descriptions do not exist. Recently, evolutionary algorithms are gaining popularity for DOPs as they can be used as robust alternatives when the deterministic techniques are invalid. In this article, a technology named ranking-based mutation operator(RMO) is presented to enhance the previous differential evolution(DE) algorithms to solve DOPs using control vector parameterization. In the RMO, better individuals have higher probabilities to produce offspring, which is helpful for the performance enhancement of DE algorithms. Three DE-RMO algorithms are designed by incorporating the RMO. The three DE-RMO algorithms and their three original DE algorithms are applied to solve four constrained DOPs from the literature. Our simulation results indicate that DE-RMO algorithms exhibit better performance than previous non-ranking DE algorithms and other four evolutionary algorithms. 展开更多
关键词 Dynamic optimization Differential evolution Ranking-based mutation operator Control vector parameterization
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Multi-objective optimization of p-xylene oxidation process using an improved self-adaptive differential evolution algorithm 被引量:1
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作者 Lili Tao Bin Xu +1 位作者 Zhihua Hu Weimin Zhong 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第8期983-991,共9页
The rise in the use of global polyester fiber contributed to strong demand of the Terephthalic acid (TPA). The liquid-phase catalytic oxidation of p-xylene (PX) to TPA is regarded as a critical and efficient chemi... The rise in the use of global polyester fiber contributed to strong demand of the Terephthalic acid (TPA). The liquid-phase catalytic oxidation of p-xylene (PX) to TPA is regarded as a critical and efficient chemical process in industry [ 1 ]. PX oxidation reaction involves many complex side reactions, among which acetic acid combustion and PX combustion are the most important. As the target product of this oxidation process, the quality and yield of TPA are of great concern. However, the improvement of the qualified product yield can bring about the high energy consumption, which means that the economic objectives of this process cannot be achieved simulta- neously because the two objectives are in conflict with each other. In this paper, an improved self-adaptive multi-objective differential evolution algorithm was proposed to handle the multi-objective optimization prob- lems. The immune concept is introduced to the self-adaptive multi-objective differential evolution algorithm (SADE) to strengthen the local search ability and optimization accuracy. The proposed algorithm is successfully tested on several benchmark test problems, and the performance measures such as convergence and divergence metrics are calculated. Subsequently, the multi-objective optimization of an industrial PX oxidation process is carried out using the proposed immune self-adaptive multi-objective differential evolution algorithm (ISADE). Optimization results indicate that application oflSADE can greatly improve the yield of TPA with low combustion loss without degenerating TA quality. 展开更多
关键词 p-Xylene oxidation Operation condition optimization Multi-objective optimization Self-adaptive differential evolution
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A solvable operator motion equation of an excited-atom coupled leaky cavity in single-photon generation
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作者 柴金华 韩正甫 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第5期1872-1876,共5页
A model for an excited-atom coupled leaky cavity in single-photon generation is proposed based on universal modes. Solvable motion equations of the atomic operators are obtained under the single-photon condition by ad... A model for an excited-atom coupled leaky cavity in single-photon generation is proposed based on universal modes. Solvable motion equations of the atomic operators are obtained under the single-photon condition by adopting the Lorentzian line type of the universal modes. 展开更多
关键词 atomic operator evolution leaky cavity universal mode single photon
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Entanglement in Three-Atom Tavis-Cummings Model Induced by a Thermal Field 被引量:2
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作者 CAIJin-Fang LIUHui-Ping 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第3期427-431,共5页
The explicit form of the evolution operator for the three-atom Tavis-Cummings model is given. The atoms can be entangled through their interaction with a thermal field. The degree of entanglement depends on the mean p... The explicit form of the evolution operator for the three-atom Tavis-Cummings model is given. The atoms can be entangled through their interaction with a thermal field. The degree of entanglement depends on the mean photon number of the thermal field and the initial state of the atoms. 展开更多
关键词 ENTANGLEMENT evolution operator Tavis-Cummings model thermal field
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Multi-Embed Nonlinear Scale-Space for Image Trust Root Generation 被引量:1
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作者 Lizhao Liu Wentu Gao +3 位作者 Jian Liu Huayi Yin Huarong Xu Shunzhi Zhu 《China Communications》 SCIE CSCD 2016年第11期170-179,共10页
An image trust root is a special type of soft trust root for trusted computing. However,image trust root generation is difficult,as it needs a corresponding stable logic feature generation model and algorithm for dyna... An image trust root is a special type of soft trust root for trusted computing. However,image trust root generation is difficult,as it needs a corresponding stable logic feature generation model and algorithm for dynamical and sustained authentication. This paper proposes a basic function of constructing new scale-spaces with deep detecting ability and high stability for image features aimed at image root generation. According to the heat distribution and spreading principle of various kinds of infinitesimal heat sources in the space medium,a multi-embed nonlinear diffusion equation that corresponds to the multi-embed nonlinear scale-space is proposed,a HARRIS-HESSIAN scale-space evaluation operator that aims at the structure acceleration characteristics of a local region and can make use of image pixels' relative spreading movement principle was constructed,then a single-parameter global symmetric proportion(SPGSP) operator was also constructed. An authentication test with 3000 to 5000 cloud entities shows the new scale-space can work well and is stable,when the whole cloud has 5%-50% behavior with un-trusted entities. Consequently,it can be used as the corresponding stable logic feature generation model and algorithm for all kinds of images,and logic relationships among image features for trust roots. 展开更多
关键词 image trust root SCALE-SPACE diffusion equation evolution operator feature detection
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Analytical Solution for Single—Mode Time—Dependent Oscillator 被引量:1
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作者 HOUGuang XUXin-Wei 《Communications in Theoretical Physics》 SCIE CAS CSCD 2002年第5期531-534,共4页
Based on the general theory of time-dependent quantum transformation, we use the 'time evolutionoperator' method to solve the single-mode time-dependent oscillator.
关键词 time-dependent transformation time-dependent oscillator time evolution operator
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ON INFINITE DIMENSIONAL RICCATI INTEGRALEQUATIONS WITH ALL COEFFICIENTSINDEFINITE
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作者 张平健 陈叔平 《Acta Mathematica Scientia》 SCIE CSCD 1998年第2期158-166,共9页
Infinite dimensional Riccati integral equations with all coefficients indefinite are studied in this paper. Relationship between this sort of Riccati integral equations and Fredholm integral equations is established.
关键词 Riccati integral equations Fredholm integral equations evolution operators
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Controllability results for semilinear impulsive integrodifferential evolution systems with nonlocal conditions 被引量:3
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作者 Bheeman RADHAKRISHNAN Krishnan BALACHANDRAN 《控制理论与应用(英文版)》 EI 2012年第1期28-34,共7页
In this paper, we establish sufficient conditions for the controllability of a class of semilinear impulsive integrodifferential systems with nonlocal initial conditions in Banach spaces. We derive the conditions usin... In this paper, we establish sufficient conditions for the controllability of a class of semilinear impulsive integrodifferential systems with nonlocal initial conditions in Banach spaces. We derive the conditions using Hausdorff measure of noncompactness, Sadovskii fixed point theorem and operator semigroups in particular dropping compactness of the operator. 展开更多
关键词 CONTROLLABILITY Impulsive integrodifferential system evolution operator Nonlocal initial conditions Condensing operator Sadovskii fixed point theorem Semigroup theory
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Controllability results for nonlinear impulsive integrodifferential evolution systems with time-varying delays
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作者 Bheeman RADHAKRISHNAN Krishnan BALACHANDRAN 《控制理论与应用(英文版)》 EI CSCD 2013年第3期415-421,共7页
In this paper, we study the controllability results for the nonlinear impulsive integrodifferential evolution systems with time-varying delays in Banach spaces. The sufficient conditions of exact controllability is pr... In this paper, we study the controllability results for the nonlinear impulsive integrodifferential evolution systems with time-varying delays in Banach spaces. The sufficient conditions of exact controllability is proved under without assuming the compactness of the evolution operator. The results are obtained by using the semigroup theory and the Schafer fixed point theorem. 展开更多
关键词 CONTROLLABILITY Impulsive integrodifferential system evolution operator Time varying delay Fixed point theorem Semigroup theory
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Grid Services Trusted Authentication Algorithm Based on Image Trusted Root in Scale Space 被引量:2
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作者 LIU Lizhao LIU Jian +2 位作者 ZHU Shunzhi LI Lin SUN Zhonghai 《Wuhan University Journal of Natural Sciences》 CAS 2012年第6期521-530,共10页
A new authentication algorithm for grid identity trusted computing unlimited by hardware is presented;the trusted root is made as an image data.The grid entity is trusted in the soft platform when its feature of image... A new authentication algorithm for grid identity trusted computing unlimited by hardware is presented;the trusted root is made as an image data.The grid entity is trusted in the soft platform when its feature of image root is entirely matched with that from the other entities' feature database in a scale space process.To recognize and detect the stable image root feature,the non-homogeneous linear expandable scale space is proposed.Focusing on relations between the scale parameter of the inhomogeneous Gaussian function terms and the space evolution of thermal diffusion homogeneous equations,three space evolution operators are constructed to exact and mark the feature from image root.Analysis and verification are carried on the new scale space,operators and the core of making decisions for grid entities certifications. 展开更多
关键词 grid computing trusted computing services trust AUTHENTICATION scale space diffusion equation evolution operator feature detection
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Meson polarized distribution function and mass dependence of the nucleon parton densities
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作者 A.Mirjalili K.Keshavarzian 《Chinese Physics C》 SCIE CAS CSCD 2014年第8期7-17,共11页
The polarized distribution functions of mesons, including pion, kaon and eta, using the proton structure function, are calculated. We are looking for a relationship between the polarized distribution of mesons and the... The polarized distribution functions of mesons, including pion, kaon and eta, using the proton structure function, are calculated. We are looking for a relationship between the polarized distribution of mesons and the polarized structure of nucleons. We show that the meson polarized parton distributions leads to zero total spin for the concerned mesons, considering the orbital angular momentum of quarks and gluons inside the meson. Two separate Monte Carlo algorithms are applied to compute the polarized parton distributions of the kaon. Via the mass dependence of quark distributions, the distribution function of the eta meson is obtained. A new method by which the polarized sea quark distributions of protons are evolved separately which cannot be performed easily using the standard solution of DGLAP equations - is introduced. The mass dependence of these distributions is obtained, using the renormalization group equation which makes their evolutions more precise. Comparison between the evolved distributions and the available experimental data validates the suggested solutions for separated evolutions. 展开更多
关键词 Valon model polarized chiral quark model constituent quark renormalization group equation evolution operator
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