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Yang-Lee Circle Theorem for an Antiferromagnetic Heisenberg Ladder

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Chinese Physics Letters 2001年第7期18卷 953-954页

作者： wang xian-Zhi Department of Physics Shanghai Jiao Tong UniversityShanghai 200030

The Yang-Lee zeros of an antiferromagnetic Heisenberg ladder model are *** is found that if J_(4)≤0 Yang-Lee zeros are located on the unit circle and on the negative real axis in the complex activity *** particular,if J_(4)≤0 and 2J_(2)≥J_(4),Yang-Lee zeros are located on the unit circle and Yang-Lee circle theorem is *** J_(4)>0,Yang Lee zeros are locted on some complicated curves.

关键词： Heisenberg circle plane.

Interactions between remote ischemic conditioning and post-stroke sleep regulation

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Frontiers of Medicine 2021年第6期15卷 867-876页

作者： xian wang Xunming Ji Beijing Institute of Brain Disorders Laboratory of Brain DisordersMinistry of Science and TechnologyCollaborative Innovation Center for Brain DisordersCapital Medical UniversityBeijing100069China Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine Beijing100069China

Sleep disturbances are common in patients with stroke,and sleep quality has a critical role in the onset and outcome of *** sleep exacerbates neurological injury,impedes nerve regeneration,and elicits serious ***,exploring a therapy suitable for patients with stroke and sleep disturbances is *** a multi-targeted nonpharmacological intervention,remote ischemic conditioning can reduce the ischemic size of the brain,improve the functional outcome of stroke,and increase sleep ***/clinical evidence showed that this method can inhibit the inflammatory response,mediate the signal transductions of adenosine,activate the efferents of the vagal nerve,and reset the circadian clocks,all of which are involved in sleep *** particular,cytokines tumor necrosis factorα(TNFα)and adenosine are sleep factors,and electrical vagal nerve stimulation can improve *** the basis of the common mechanisms of remote ischemic conditioning and sleep regulation,a causal relationship was proposed between remote ischemic conditioning and post-stroke sleep quality.

关键词： remote ischemic conditioning sleep regulation stroke

Effect of temperature on the hydration process and strength development in blends of Portland cement and activated coal gangue or fly ash

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第2期12卷 162-170页

作者： Pei-ming wang xian-ping LIU Key Laboratory of Advanced Civil Engineering Materials (Tongji University) Ministry of Education Shanghai 201804 China

This paper describes the results of an investigation into the effect of the variation of curing temperatures between 0 and 60 °C on the hydration process,pore structure variation,and compressive strength development of activated coal gangue-cement blend(ACGC) . Hardened ACGC pastes cured for hydration periods from 1 to 360 d were examined using the non-evaporable water method,thermal analysis,mercury intrusion porosimetry,and mechanical testing. To evaluate the specific effect of activated coal gangue(ACG) as a supplementary cementing material(SCM) ,a fly ash-cement blend(FAC) was used as a control. Results show that raising the curing temperature accelerates pozzolanic reactions involving the SCMs,increasing the degree of hydration of the cement blends,and hence increasing the rate of improvement in strength. The effect of curing temperature on FAC is greater than that on ACGC. The pore structure of the hardened cement paste is improved by increasing the curing temperature up to 40 °C,but when the curing temperature reaches 60 °C,the changing nature of the pore structure leads to a decrease in strength. The correlation between compressive strength and the degree of hydration and porosity is linear in nature.

关键词： Activated coal gangue (ACG) Fly ash (FA) Blended cement Hydration Curing temperature Strength

Sustainable Polyamides Enabled by Controlled Ring-opening Polymerization of 4-Hydroxyproline-derived Lactams

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Chinese Journal of Polymer Science 2023年第5期41卷 728-734,I0008页

作者： Jian-Qun wang xian-Hong wang You-Hua Tao Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China

Aliphatic polyamides have been considered as eco-friendly materials,useful for a wide range of ***,it still presents obstacle to produce sustainable aliphatic polyamides from abundant renewable ***,we describe that 4-hydroxyproline(4-HYP),a renewable resource,was readily converted to its corresponding bicyclic bridged lactam monomers bearing pendant Boc-protected secondary amino group,and oligo-ethylene glycol *** hexamethyldisilazide(LiHMDS)-mediated polymerization of the resulting monomers exhibited a controlled feature,affording sustainable aliphatic polyamides with number-average molecular weight up to 73 kg/mol and a low molecular weight distribution?<***,this work can lead to a novel kind of functional and sustainable polyamides with potential applications,including degradable plastics,and drug delivery.

关键词： Polyamides Renewable Ring-opening polymerization 4-Hydroxyproline

Some Analytical Properties of the Model for Stochastic Evolutionary Games in Finite Populations with Non-uniform Interaction Rate

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Communications in Theoretical Physics 2013年第7期60卷 37-47页

作者： QUAN Ji wang xian-Jia GuangDong Electric Power Design Institute China Energy Engineering Group Co. Ltd Guangzhou 510663 China Department of Management and Economics Tianjin University Tianjin 300072 China Institute of Systems Engineering Wuhan University Wuhan 430072 China School of Economics and Management Wuhan University Wuhan 430072 China

Traditional evolutionary games assume uniform interaction rate, which means that the rate at which individuals meet and interact is independent of their strategies. But in some systems, especially biological systems, the players interact with each other discriminately. Taylor and Nowak (2006) were the first to establish the corresponding non-uniform interaction rate model by allowing the interaction rates to depend on strategies. Their model is based on replicator dynamics which assumes an infinite size population. But in reality, the number of individuals in the population is always finite, and there will be some random interference in the individuals' strategy selection process. Therefore, it is more practical to establish the corresponding stochastic evolutionary model in finite populations. In fact, the analysis of evolutionary games in a finite size population is more difficult. Just as Taylor and Nowak said in the outlook section of their paper, 'The analysis of non-uniform interaction rates should be extended to stochastic game dynamics of finite populations.' In this paper, we are exactly doing this work. We extend Taylor and Nowak's model from infinite to finite case, especially focusing on the influence of non-uniform connection characteristics on the evolutionary stable state of the system. We model the strategy evolutionary process of the population by a continuous ergodic Markov process. Based on the limit distribution of the process, we can give the evolutionary stable state of the system. We make a complete classification of the symmetric 2×2 games. For each case game, the corresponding limit distribution of the Markov-based process is given when noise intensity is small enough. In contrast with most literatures in evolutionary games using the simulation method, all our results obtained are analytical. Especially, in the dominant-case game, coexistence of the two strategies may become evolutionary stable states in our model. This result can be used to

关键词： stochastic evolutionary games non-uniform interaction rate finite population evolutionary stablestate

Proper Biharmonic Submanifolds in a Sphere

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Acta Mathematica Sinica,English Series 2012年第1期28卷 205-218页

作者： xian Feng wang Lan WU School of Mathematical Sciences and LPMC Nankai UniversityTianjin 300071P.R.China Department of Mathematics Renmin University of ChinaBeijing 100872P.R.China

In this paper, we obtain a constraint of the mean curvature for proper biharmonic submanifolds in a sphere. We give some characterizations of some proper biharmonic submanifolds with parallel mean curvature vector in ... 详细信息

关键词： Proper biharmonic map parallel mean curvature vector mean curvature

On Strong Embeddability and Finite Decomposition Complexity

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Acta Mathematica Sinica,English Series 2017年第3期33卷 403-418页

作者： Jun XIA xian Jin wang College of Mathematics and Statistics Chongqing University Chongqing 401331 P. R. China

The strong embeddability is a notion of metric geometry, which is an intermediate property lying between coarse embeddability and property A. In this paper, we study the permanence properties of strong embeddability for metric spaces. We show that strong embeddability is coarsely invariant and it is closed under taking subspaces, direct products, direct limits and finite unions. Furthermore, we show that a metric space is strongly embeddable if and only if it has weak finite decomposition complexity with respect to strong embeddability.

关键词： Metric geometry strong embeddability coarse invariance permanence properties finitedecomposition complexity

Evolution of donations on scale-free networks during a COVID-19 breakout

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Chinese Physics B 2022年第8期31卷 212-225页

作者： xian-Jia wang Lin-Lin wang Economics and Management School Wuhan UniversityWuhan 430072China Institute of Systems Engineering Wuhan UniversityWuhan 430072China

Having a large number of timely donations during the early stages of a COVID-19 breakout would normally be considered rare. Donation is a special public goods game with zero yield for donors, and it has the characteristics of the prisoners’ dilemma. This paper discusses why timely donations in the early stages of COVID-19 occurred. Based on the idea that donation is a strategy adopted by players during interconnection on account of their understanding of the environment, donation-related populations are placed on social networks and the inter-correlation structures in the population are described by scale-free networks. Players in donation-related populations are of four types: donors, illegal beneficiaries,legal beneficiaries, and inactive people. We model the evolutionary game of donation on a scale-free network. Donors,illegal beneficiaries and inactive people learn and update strategies under the Fermi update rule, whereas the conversion between legal beneficiaries and the other three types is determined by the environment surrounding the players. We study the evolution of cooperative action when the agglomeration coefficient, the parameters of the utility function, the noise intensity, the utility coefficient, the donation coefficient and the initial states of the population on the scale-free network change. For population sizes of 50, 100, 150, and 200, we give the utility functions and the agglomeration coefficients for promoting cooperation and study the corresponding steady states and structural characteristics of the population. We identify the best ranges of the noise intensity K, the donation coefficient α and the utility coefficient β for promoting cooperation at different population sizes. Furthermore, with the increase of the population size, the donor traps are *** the same time, it is discovered that the initial states of the population have a great impact on the steady states;thus the upper and lower triangle phenomena are proposed. We also fi

关键词： donation public goods game evolutionary game scale-free network

Evaluation of global navigation satellite system spoofing efficacy

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Journal of Systems Engineering and Electronics 2022年第6期33卷 1238-1257页

作者： wang Yue SUN Fuping HAO Jinming ZHANG Lundong wang xian PLA Strategic Support Force Information Engineering University Henan 450001China

The spoofing capability of Global Navigation Satellite System(GNSS)represents an important confrontational capability for navigation security,and the success of planned missions may depend on the effective evaluation of spoofing ***,current evaluation systems face challenges arising from the irrationality of previous weighting methods,inapplicability of the conventional multi-attribute decision-making method and uncertainty existing in *** solve these difficulties,considering the validity of the obtained results,an evaluation method based on the game aggregated weight model and a joint approach involving the grey relational analysis and technique for order preference by similarity to an ideal solution(GRA-TOPSIS)are firstly proposed to determine the optimal *** and dynamic evaluation results under different schemes are then obtained via a fuzzy comprehensive assessment and an improved dynamic game method,to prioritize the deceptive efficacy of the equipment accurately and make pointed improvement for its core *** use of judging indicators,including Spearman rank correlation coefficient and so on,combined with obtained evaluation results,demonstrates the superiority of the proposed method and the optimal scheme by the horizontal comparison of different methods and vertical comparison of evaluation ***,the results of field measurements and simulation tests show that the proposed method can better overcome the difficulties of existing methods and realize the effective evaluation.

关键词： Global Navigation Satellite System(GNSS)spoofing index system for spoofing strategy game aggregated weight model grey relational analysis and technique for order preference by similarity to an ideal solution(GRA-TOPSIS)method dynamic game method