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The entanglement between two isolated atoms in the double mode mode competition model
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作者 吴琴 方卯发 +1 位作者 蔡建武 胡要花 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第12期5336-5341,共6页
Extending the double Jaynes Cummings model to a more complicated case where the mode-mode competition is considered, we investigate the entanglement character of two isolated atoms by means of concurrence, and discuss... Extending the double Jaynes Cummings model to a more complicated case where the mode-mode competition is considered, we investigate the entanglement character of two isolated atoms by means of concurrence, and discuss the dependence of atom atom entanglement on the different initial state and the relative coupling strength between the atom and the corresponding cavity field. The results show that the amplitude and the period of the atom atom entanglement evolution can be controlled by the choice of initial state and relative coupling strength, respectively. We find that the phenomenon of entanglement sudden death (ESD) is sensitive to the initial conditions. The length of the time interval for zero entanglement depends not only on the initial degree of entanglement between two atoms but also on the relative coupling strength of atom field interaction. The ESD effect can be weakened by enhancing the mode-mode competition between the three- and single-photon processes. 展开更多
关键词 double mode-mode competition model CONCURRENCE ENTANGLEMENT sudden death
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What Competition Model for Economic Development Should China Adopt at the Present Stage?
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作者 华民 《China Economist》 2008年第3期116-125,共10页
As a major developing country,China has attracted significant attention as to whichpathitshouldfol owfortechnologicalprogress.Accordingtotheauthorofthispaper,Chinashouldcontinueto pursue the international division of ... As a major developing country,China has attracted significant attention as to whichpathitshouldfol owfortechnologicalprogress.Accordingtotheauthorofthispaper,Chinashouldcontinueto pursue the international division of labor and competition strategy based on comparative advantages.Meanwhile,China should,through reform and adjustment,build a national innovation system capable ofplaying an e ective role in the future.However,laying too much emphasis on proprietary innovation atthe present stage wil bring about undesirable consequences.The timing for China to embark on a path oftechnologicaldevelopmentthroughproprietaryinnovationissubjecttothechangesbothintradeconditionsandin income distribution e ects arising from proprietary innovation. 展开更多
关键词 What competition model for Economic Development Should China Adopt at the Present Stage
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CRB:A new rumor blocking algorithm in online social networks based on competitive spreading model and influence maximization
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作者 董晨 徐桂琼 孟蕾 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第8期588-604,共17页
The virtuality and openness of online social platforms make networks a hotbed for the rapid propagation of various rumors.In order to block the outbreak of rumor,one of the most effective containment measures is sprea... The virtuality and openness of online social platforms make networks a hotbed for the rapid propagation of various rumors.In order to block the outbreak of rumor,one of the most effective containment measures is spreading positive information to counterbalance the diffusion of rumor.The spreading mechanism of rumors and effective suppression strategies are significant and challenging research issues.Firstly,in order to simulate the dissemination of multiple types of information,we propose a competitive linear threshold model with state transition(CLTST)to describe the spreading process of rumor and anti-rumor in the same network.Subsequently,we put forward a community-based rumor blocking(CRB)algorithm based on influence maximization theory in social networks.Its crucial step is to identify a set of influential seeds that propagate anti-rumor information to other nodes,which includes community detection,selection of candidate anti-rumor seeds and generation of anti-rumor seed set.Under the CLTST model,the CRB algorithm has been compared with six state-of-the-art algorithms on nine online social networks to verify the performance.Experimental results show that the proposed model can better reflect the process of rumor propagation,and review the propagation mechanism of rumor and anti-rumor in online social networks.Moreover,the proposed CRB algorithm has better performance in weakening the rumor dissemination ability,which can select anti-rumor seeds in networks more accurately and achieve better performance in influence spread,sensitivity analysis,seeds distribution and running time. 展开更多
关键词 online social networks rumor blocking competitive linear threshold model influence maximization
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Analysis of Porter’s Five Forces Competitive Model in China’s Property Rights Trading Market
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作者 Weinong Wang 《Proceedings of Business and Economic Studies》 2024年第3期206-211,共6页
In recent years,China’s property rights trading market has been extremely competitive,but there are also new contradictions and challenges.This paper aims to analyze the external and internal competitive market of th... In recent years,China’s property rights trading market has been extremely competitive,but there are also new contradictions and challenges.This paper aims to analyze the external and internal competitive market of the property rights market through Porter’s five forces competition model,then find out the problems and defects in the development,thereby promoting the better development and progress of China’s property rights trading market. 展开更多
关键词 Porter’s five forces competitive model Market optimization Innovative development
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Road Resources Distribution and Evolution Analysis Using a Species Competition Model for Improving Road Equity 被引量:8
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作者 应习文 石京 《Tsinghua Science and Technology》 SCIE EI CAS 2008年第5期651-659,共9页
The paper analyzes the equity of road resources distribution in urban areas by modeling the competitive relationship among different road users. A logistic model is used to describe the development of different traffi... The paper analyzes the equity of road resources distribution in urban areas by modeling the competitive relationship among different road users. A logistic model is used to describe the development of different traffic modes in the transportation network. The system is similar to the species competition model, so a two-species model is used to analyze the relationship between users based on the stability of the equilibrium points. The Lotka-Volterra model is then used to describe the multi-species cases with numerical examples, showing that this model can describe the effects of the road space distribution on the competitive user relationships. Policy makers must ensure the equity of road resources distribution so that each urban transportation mode is properly developed for sustainable social development. 展开更多
关键词 EQUITY competition model resource distribution Lotka-Volterra model
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Strategic Bidding in Distribution Network Electricity Market Focusing on Competition Modeling and Uncertainties 被引量:2
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作者 Mehrdad Mallaki Mehdi S.Naderi +2 位作者 Mehrdad Abedi Saeed D.Manshadi Gevork B.Gharehpetian 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2021年第3期561-572,共12页
Developing the electricity market at the distribution level can facilitate the energy transactions in distribution networks with a high penetration level of distributed energy resources(DERs)and microgrids(MGs).Howeve... Developing the electricity market at the distribution level can facilitate the energy transactions in distribution networks with a high penetration level of distributed energy resources(DERs)and microgrids(MGs).However,the lack of comprehensive information about the marginal production cost of competitors leads to uncertainties in the optimal bidding strategy of participants.The electricity demand within the network and the price in the wholesale electricity market are two other sources of the uncertainties.In this paper,a day-ahead-market-based framework for managing the energy transactions among MGs and other participants in distribution networks is introduced.A game-theory-based method is presented to model the competition and determine the optimal bidding strategy of participants in the market.Robust optimization technique is employed to capture the uncertainties in the marginal cost of competitors.Additionally,the uncertainties in demand are modeled using a scenario-based stochastic approach.The results ob-tained from case studies reveal the merit of considering competition modeling and uncertainties. 展开更多
关键词 competition modeling bidding strategy distribution network electricity market MICROGRID uncertainty robust optimization
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EXISTENCE OF POSITIVE PERIODIC SOLUTION TO A CLASS OF NEUTRAL DELAY COMPETITION MODEL 被引量:3
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作者 Chen Fulai Liao Jiawu Wen Xianzhang 《Annals of Differential Equations》 2006年第1期13-20,共8页
By means of the theory of coincidence degree, sufficient condition for the existence of positive periodic solution to certain neutral delay competition model is obtained.
关键词 neutral delay competition model periodic solution coincidence degree
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GLOBAL ANALYSIS TO A KIND OF COMPETITION MODEL OF E-COMMERCE SITES 被引量:1
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作者 李艳会 朱思铭 《Annals of Differential Equations》 2003年第3期325-333,共9页
In this paper, we present a competition modei of e-commerce sites with the property of 'better for better'. Then we qualitatively analyze the special case of two dimensions. So we prove that there does not exi... In this paper, we present a competition modei of e-commerce sites with the property of 'better for better'. Then we qualitatively analyze the special case of two dimensions. So we prove that there does not exist limit cycle, in the first quadrant of the phase plane and all trajectories tend to some singular points. 展开更多
关键词 e-commerce sites competition model ordinary differential equation qualitative analysis
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Stability analysis of n-species Lotka-Volterra almost periodic competition models with grazing rates and diffusions 被引量:1
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作者 Yi-Jin Zhang Chang-You Wang 《International Journal of Biomathematics》 2014年第2期1-11,共11页
In this pape, almost periodic solution of a n-species Lotka-Volterra competition system with grazing rates and diffusions is investigated. By using the method of upper and lower solutions anti Schauder fixed point the... In this pape, almost periodic solution of a n-species Lotka-Volterra competition system with grazing rates and diffusions is investigated. By using the method of upper and lower solutions anti Schauder fixed point theorem as well as Lyapunov stability theory, we give sufficient conditions under which the strictly positive space homogeneous almost perilodic solution of the system is globally asymptotically stable. Moreover, some numerical simulations are given to validate our theoretical analysis. 展开更多
关键词 Grazing rate competition model diffusion almost periodic solution stability.
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Positive Solutions for a Competition Model with an Inhibitor Involved
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作者 Bin Chen 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2008年第4期589-598,共10页
In the paper, we study the positive solutions of a diffusive competition model with an inhibitor involved subject to the homogeneous Dirichlet boundary condition. The existence, uniqueness, stability and multiplicity ... In the paper, we study the positive solutions of a diffusive competition model with an inhibitor involved subject to the homogeneous Dirichlet boundary condition. The existence, uniqueness, stability and multiplicity of positive solutions are discussed. This is mainly done by using the local and global bifurcation theory. 展开更多
关键词 competition model INHIBITOR positive solutions BIFURCATION UNIQUENESS MULTIPLICITY
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Storage reliability assessment model based on competition failure of multi-components in missile 被引量:10
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作者 Yunxiang Chen Qiang Zhang +1 位作者 Zhongyi Cai Lili Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第3期606-616,共11页
The degradation data of multi-components in missile is derived by periodical testing. How to use these data to assess the storage reliability (SR) of the whole missile is a difficult problem in current research. An SR... The degradation data of multi-components in missile is derived by periodical testing. How to use these data to assess the storage reliability (SR) of the whole missile is a difficult problem in current research. An SR assessment model based on competition failure of multi-components in missile is proposed. By analyzing the missile life profile and its storage failure feature, the key components in missile are obtained and the characteristics voltage is assumed to be its key performance parameter. When the voltage testing data of key components in missile are available, a state space model (SSM) is applied to obtain the whole missile degradation state, which is defined as the missile degradation degree (DD). A Wiener process with the time-scale model (TSM) is applied to build the degradation failure model with individual variability and nonlinearity. The Weibull distribution and proportional risk model are applied to build an outburst failure model with performance degradation effect. Furthermore, a competition failure model with the correlation between degradation failure and outburst failure is proposed. A numerical example with a set of missiles in storage is analyzed to demonstrate the accuracy and superiority of the proposed model. 展开更多
关键词 competition failure model storage reliability (SR) missile degradation degree (DD) proportional risk model individual variability
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PERIODIC SOLUTION OF A NEUTRALDELAY COMPETITION MODEL
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作者 李永昆 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 1999年第3期281-286,共6页
In this paper, we use topological degree method to obtain the existence of a positive periodicsolution of the neutral delay competition modelwhere α,β,ri,ki,ci (i=1,2) are positive continuous ω-periodic functions a... In this paper, we use topological degree method to obtain the existence of a positive periodicsolution of the neutral delay competition modelwhere α,β,ri,ki,ci (i=1,2) are positive continuous ω-periodic functions and rj (j=0,1,…,4) arenonnegative constants. 展开更多
关键词 competition model neutral delay equations periodic solution topological degree
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Control of GaN inverted pyramids growth on c-plane patterned sapphire substrates
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作者 Luming Yu Xun Wang +8 位作者 Zhibiao Hao Yi Luo Changzheng Sun Bing Xiong Yanjun Han Jian Wang Hongtao Li Lin Gan Lai Wang 《Journal of Semiconductors》 EI CAS CSCD 2024年第6期92-96,共5页
Growth of gallium nitride(GaN)inverted pyramids on c-plane sapphire substrates is benefit for fabricating novel devices as it forms the semipolar facets.In this work,GaN inverted pyramids are directly grown on c-plane... Growth of gallium nitride(GaN)inverted pyramids on c-plane sapphire substrates is benefit for fabricating novel devices as it forms the semipolar facets.In this work,GaN inverted pyramids are directly grown on c-plane patterned sapphire substrates(PSS)by metal organic vapor phase epitaxy(MOVPE).The influences of growth conditions on the surface morphol-ogy are experimentally studied and explained by Wulff constructions.The competition of growth rate among{0001},{1011},and{1122}facets results in the various surface morphologies of GaN.A higher growth temperature of 985 ℃ and a lowerⅤ/Ⅲratio of 25 can expand the area of{}facets in GaN inverted pyramids.On the other hand,GaN inverted pyramids with almost pure{}facets are obtained by using a lower growth temperature of 930℃,a higherⅤ/Ⅲratio of 100,and PSS with pattern arrangement perpendicular to the substrate primary flat. 展开更多
关键词 inverted pyramids GAN MOVPE crystal growth competition model
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Information Entropy Squeezing for a Atom in Mode-Mode Competition System 被引量:2
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作者 WU Qin FANG Mao-Fa +2 位作者 LI Shao-Xin LI Ying HU Yao-Hua 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第12期1411-1416,共6页
The entropy squeezing properties for a two-level atom interacting with a two-mode field via two differentcompeting transitions are investigated from a quantum information point of view.The influences of the initial st... The entropy squeezing properties for a two-level atom interacting with a two-mode field via two differentcompeting transitions are investigated from a quantum information point of view.The influences of the initial state of thesystem and the relative coupling strength between the atom and the field on the atomic information entropy squeezingare discussed.Our results show that the squeezed direction and the frequency of the information entropy squeezing canbe controlled by choosing the phase of the atom dipole and the relative competing strength of atom-field,respectively.We find that,under the same condition,no atomic variance squeezing is predicted from the HUR while optimal entropysqueezing is obtained from the EUR,so the quantum information entropy is a remarkable precision measure for theatomic squeezing in the considered system. 展开更多
关键词 mode-mode competition model information entropy squeezing variance squeezing information entropy uncertainty relation
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A New Competitive Adsorption Isothermal Model of Heavy Metals in Soils 被引量:7
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作者 XUE Wen-Bo YI Ai-Hua +3 位作者 ZHANG Zeng-Qiang TANG Ci-Lai ZHANG Xing-Chang GAO Jin-Ming 《Pedosphere》 SCIE CAS CSCD 2009年第2期251-257,共7页
A new competitive adsorption isothermal model(CAIM)was developed for the coexistent and competitive binding of heavy metals to the soil surface.This model extended the earlier adsorption isothermal models by consideri... A new competitive adsorption isothermal model(CAIM)was developed for the coexistent and competitive binding of heavy metals to the soil surface.This model extended the earlier adsorption isothermal models by considering more than one kind of ion adsorption on the soil surface.It was compared with the Langmuir model using different conditions, and it was found that CAIM,which was suitable for competitive ion adsorption at the soil solid-liquid surface,had more advantages than the Langmuir model.The new competitive adsorption isothermal model was used to fit the data of heavy metal(Zn and Cd)competitive adsorption by a yellow soil at two temperatures.The results showed that CAIM was appropriate for the competitive adsorption of heavy metals on the soil surface at different temperatures.The fitted parameters of CAIM had explicit physical meaning.The model allowed for the calculation of the standard molar Gibbs free energy change,the standard molar enthalpy change,and the standard molar entropy change of the competitive adsorption of the heavy metals,Zn and Cd,by the yellow soil at two temperatures using the thermodynamic equilibrium constants. 展开更多
关键词 combined pollution competitive adsorption isothermal model heavy metal thermodynamic parameters
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Adsorption of 2-naphthalenesulfonic acid/sulfuric acid/sulfurous acid from aqueous solution by iron-impregnated weakly basic resin:Equilibrium and model 被引量:1
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作者 Changhai Li Dongmei Jia 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2016年第11期1522-1526,共5页
Commercial grade weakly basic resin D301 was impregnated with iron through a simple method using ferric chloride. Experiments for single, bisolute and trinary competitive adsorption were carried out to investigate the... Commercial grade weakly basic resin D301 was impregnated with iron through a simple method using ferric chloride. Experiments for single, bisolute and trinary competitive adsorption were carried out to investigate the adsorption behavior of 2-naphthalenesulfonic acid(NSA), sulfuric acid and sulfurous acid from their solution at 298 K onto the novel hybrid iron impregnated D301(Fe-D301). Adsorption affinity of NSA on Fe-D301 was found to be much higher than that of sulfuric acid, while adsorption affinity of sulfuric acid was slightly higher than that of sulfurous acid. The data of single-solute adsorption were fitted to the Langmuir model and the Freundlich adsorption model. The non-ideal competitive adsorbed model coupled with the single-solute adsorption models were used to predict the bisolute and trinary-solute competitive adsorption equilibria. The NICM coupled with the Langmuir model yields the favorable representation of the bisolute and trinary-solute competitive adsorption behavior. 展开更多
关键词 2-naphthalenesulfonic acid Hybrid iron impregnated D301 Adsorption Non-ideal competitive adsorbed model model Equilibrium
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Conceptual Model for Urban Competitiveness 被引量:1
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作者 Yongqiang Li 《Chinese Business Review》 2005年第9期6-9,14,共5页
Urban competitiveness is always the focus of researches on urban economy. The variety of definitions and evaluation systems of urban competitiveness are the results of lack of accurate and comprehensive understanding ... Urban competitiveness is always the focus of researches on urban economy. The variety of definitions and evaluation systems of urban competitiveness are the results of lack of accurate and comprehensive understanding on urban competitiveness. This paper reviews five groups of definitions on urban competitiveness and establishes a conceptual model for urban competitiveness. 展开更多
关键词 urban competitiveness conceptual model competitiveness
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Quantum Collapse and Revival of Atom in Mode-Mode Competing System 被引量:2
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作者 WUQin FANGMao-Fa 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第3期515-518,共4页
The atomic inversion dynamics in the mode-mode competing system is studied bymeans of fully quantum theory. A general solution to the Schroedinger equation of this system isobtained. The influence of the relative comp... The atomic inversion dynamics in the mode-mode competing system is studied bymeans of fully quantum theory. A general solution to the Schroedinger equation of this system isobtained. The influence of the relative competing strength between the atom and the two-mode Geld onthe atomic inversion is disccussed. We show that the presence of the mode-mode competition canresult in periodical collapses-revivals of the atomic inversion. 展开更多
关键词 two-mode competition model atomic inversion collapse and revival
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THE DISCRETE DYNAMICS FOR COMPETITIVE POPULATIONS OF LOTKA-VOLTERRA TYPE
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作者 LIU LAIFU AND GONG BIN 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1995年第4期419-426,共8页
The discrete dynamics for competition populations of Lotka-Volterra type modeled as N1(t+1)=N1(t) exp[r1(1-N1-b12N2)], N2(t+1)=N2(t) exp[r2(1-N2-b21N1)] is considered in the paper. In the case of non-persistence the a... The discrete dynamics for competition populations of Lotka-Volterra type modeled as N1(t+1)=N1(t) exp[r1(1-N1-b12N2)], N2(t+1)=N2(t) exp[r2(1-N2-b21N1)] is considered in the paper. In the case of non-persistence the attractive behavior of model has been discussed. Especially, there are two attractive sets when h_(ij)>1, and the attractive behaviors are more complicated than that of the corresponding cofitinuous model. The attracted regions are given. We prove that the model is also persistent in the degenerate case of b_(ij)=1. In the persistence case of b_(ij)<1, the existence and uniqueness for two-period points of the model are studied at r1=r2. The condition for the multi-pair of two-period points is indicated and their influences on population dynamical behaviors are shown. 展开更多
关键词 competition model non-linear discrete dynamics attractive behavior persistence two-period point.
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EFFECT OF CROSS DIFFUSION IN A COMPETITION MODEL WITH STAGE STRUCTURE
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作者 LINA ZHANG SHENGMAO FU PING HU 《International Journal of Biomathematics》 2012年第6期77-94,共18页
The purpose of this paper is to study the effect of cross diffusion in a competition model with stage structure, under homogeneous Neumann boundary condition. It will be shown that cross diffusion cannot only destabil... The purpose of this paper is to study the effect of cross diffusion in a competition model with stage structure, under homogeneous Neumann boundary condition. It will be shown that cross diffusion cannot only destabilize a uniform positive equilibrium, it can also help diffusion to induce instability of the uniform positive equilibrium. Moreover, stationary patterns can arise from the effect of cross diffusion. 展开更多
关键词 competition model stage structure cross diffusion INSTABILITY pattern.
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