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Attractor for the Extensible Beam Equation with Nonlocal Weak Damping on Time–Dependent Space

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Acta Mathematica Sinica,English Series 2024年第4期40卷 1115-1126页

作者： chun xiang ZHAO Feng Juan MENG Institute of Applied System Analysis Jiangsu UniversityZhenjiang 212013P.R.China School of Mathematics and Physics Jiangsu University of TechnologyChangzhou 213001P.R.China

In this article,we consider the long-time behavior of extensible beams with nonlocal weak damping:ε(t)u_(tt)+Δ^(2)u-m(‖▽u‖^(2))Δu+‖u_(t)‖^(p_(u_(t)))+f(u)=h,whereε(t)is a decreasing function vanishing at *** the theory of process on time-dependent spaces,we investigate the existence of the time-dependent attractor by using the Condition(C_(t))method and more detailed *** results obtained essentially improve and complete some previous works.

关键词： Time-dependent attractor extensible beams equation nonlocal weak damping

ECC-Based RFID Authentication Protocol

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Journal of Electronic Science and Technology 2020年第4期18卷 320-329页

作者： Xing-chun Yang chun-xiang Xu Chao-Rong Li Department of Computer Science and Technology Sichuan Police CollegeLuzhou 646000 School of Computer Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731 Department of Computer Science and Information Engineering Yibin UniversityYibin 644000

The radio frequency identification(RFID)technology has been widely used so far in industrial and commercial *** develop the RFID tags that support elliptic curve cryptography(ECC),we propose a scalable and mutual authentication protocol based on *** also suggest a tag privacy model that provides adversaries exhibiting strong abilities to attack a tag’s *** prove that the proposed protocol preserves privacy under the privacy model and that it meets general security *** with other recent ECCbased RFID authentication protocols,our protocol provides tag privacy and performs the best under comprehensive evaluation of tag privacy,tag computation cost,and communications cost.

关键词： Elliptic curve cryptography radio frequency identification(RFID) authentication protocol privacy

Glucose Biosensor Based on Carbon/PVC-COOH/Ferrocene Composite with Covalently Immobilized Enzyme

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Chinese Chemical Letters 2005年第10期16卷 1357-1360页

作者： chun xiang LI Yun Long ZENG chun Ran TANG Chemistry and Chemical Engineering College Hunan University of Science and Technology Xiangtan 411201

A carbon/PVC-COOH/ferrocene composite electrode used for the determination of glucose has been prepared. The ferrocene acted as mediator was incorporated into the PVC-COOH polymer and the leakage could be prevented. The presence of carboxyl groups on the electrode surface allowed immobilizing enzyme via EDC and NHS. The ratio of PVC-COOH to graphite powder （w/w） has been studied. Amperometric determination of glucose has been performed at potential of 0.30 V vs SCE. The response time was 〈 15 s. The linear response range was of 0.1-20 mmol/L with a detection limit of 48μmol/L.

关键词： PVC-COOH ferrocene glucose oxidase glucose.

Convenient one-pot synthesis of functionalized (E)-2-arylvinyl bromides from (E)-4-(2-bromovinyl)phenyl acetate

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Chinese Chemical Letters 2009年第5期20卷 545-548页

作者： Yu Bo Jiang chun xiang Kuang Department of Chemistry Tongji University Siping Road 1239 Shanghai 200092 China

A convenient one-pot synthesis of functionalized （E）-2-arylvinyl bromides was achieved by microwave-induced deacetylation and subsequent acylation using dicyclohexyl carbodiimide （DCC） and dimethylamino-pyridine ... 详细信息

关键词： One-pot synthesis (E)-2-Arylvinyl bromide Acylation Deacetylation

Optimal Reinsurance and Investment Strategy with Delay in Heston’s SV Model

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Journal of the Operations Research Society of China 2021年第2期9卷 245-271页

作者： chun-xiang a Ai-Lin Gu Yi Shao School of Mathematics and Statistics Zhaoqing UniversityZhaoqing 526061GuangdongChina School of Applied Mathematics Guangdong University of TechnologyGuangzhou 510520China

In this paper,we consider an optimal investment and proportional reinsurance problem with delay,in which the insurer’s surplus process is described by a jump-diffusion *** insurer can buy proportional reinsurance to transfer part of the insurance claims *** addition to reinsurance,she also can invests her surplus in a financial market,which is consisted of a risk-free asset and a risky asset described by Heston’s stochastic volatility(SV)*** the performance-related capital flow,the insurer’s wealth process is modeled by a stochastic differential delay *** insurer’s target is to find the optimal investment and proportional reinsurance strategy to maximize the expected exponential utility of combined terminal *** explicitly derive the optimal strategy and the value ***,we provide some numerical examples to illustrate our results.

关键词： Proportional reinsurance Stochastic differential delay equation(SDDE) Heston’s stochastic volatility(SV)model Hamilton–Jacobi–Bellman(HJB)equation

Spins of Triaxial Superdeformed Bands in ^(86)Zr

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Chinese Physics Letters 2000年第7期17卷 478-479页

作者： LIU Zu-hua YANG chun-xiang China Institute of Atomic Energy Beijing 102413

Transition energies of three triaxial superdeformed bands in 86Zr were fitted by the power-series expansion of spin I in odd powers of rotationalfrequeney ψ and by the two-parameter expression for rotational spectra.... 详细信息

关键词： spectra bands rotational

Characterizing R-duality in Banach Spaces

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Acta Mathematica Sinica,English Series 2013年第1期29卷 75-84页

作者： Ole CHRISTENSEN xiang chun XIAO Yu Can ZHU Department of Mathematics Technical University of Denmark Department of Mathematics Fuzhou University

R-duals of certain sequences in Hilbert spaces were introduced by Casazza, Kutyniok and Lammers in 2004 and later generalized to Banach spaces by Xiao and Zhu. In this paper we provide some characterizations of R-dual... 详细信息

关键词： R-duals p-frames p-Riesz bases duality

Nonlinear Discrete Inequality in Two Variables with Delay and Its Application

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Acta Mathematicae Applicatae Sinica 2014年第2期30卷 389-400页

作者： Hong WANG Ke-long ZHENG chun-xiang GUO School of Science Southwest University of Science and Technology School of Business Sichuan University

Delay discrete integral inequalities with n nonlinear terms in two variables are discussed, which generalize some existing results and can be used as powerful tools in the analysis of certain partial difference equati... 详细信息

关键词： discrete inequality nonlinear delay boundedness

An Inertial Semi-forward-reflected-backward Splitting and Its Application

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Acta Mathematica Sinica,English Series 2022年第2期38卷 443-464页

作者： chun xiang ZONG Yu Chao TANG Guo Feng ZHANG School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000.P.R.China Department of Mathematics Nanchang UniversityNanchang 330031P.R.China

Inertial methods play a vital role in accelerating the convergence speed of optimization *** work is concerned with an inertial semi-forward-reflected-backward splitting algorithm of approaching the solution of sum of a maximally monotone operator,a cocoercive operator and a monotone-Lipschitz continuous *** theoretical convergence properties of the proposed iterative algorithm are also presented under mild *** importantly,we use an adaptive stepsize rule in our algorithm to avoid calculating Lipschitz constant,which is generally unknown or difficult to estimate in practical *** addition,a large class of composite monotone inclusion problem involving mixtures of linearly composed and parallel-sum type monotone operators is solved by combining the primal-dual approach and our proposed *** a direct application,the obtained inertial algorithm is exploited to composite convex optimization problem and some numerical experiments on image deblurring problem are also investigated to demonstrate the efficiency of the proposed algorithm.

关键词： Operator splitting inertial scheme composite monotone inclusions composite convex optimization total variation