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Chinese Physics B 2010年第11期19卷 212-217页

作者：邵海见蔡国梁汪浩祥 Nonlinear scientific research Center Jiangsu University

In this study, a successful linear matrix inequality approach is used to analyse a non-parameter perturbation of multi-delay Hopfield neural network by constructing an appropriate Lyapunov-Krasovskii functional. This ... 详细信息

关键词： Hopfield neural network LMI approach global synchronisation sliding mode control

Global exponential stability of mixed discrete and distributively delayed cellular neural network

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Chinese Physics B 2011年第1期20卷 245-257页

作者：姚洪兴周佳燕 Nonlinear scientific research Center Jiangsu University

This paper concernes analysis for the global exponential stability of a class of recurrent neural networks with mixed discrete and distributed delays. It first proves the existence and uniqueness of the balance point, then by employing the Lyapunov-Krasovskii functional and Young inequality, it gives the sufficient condition of global exponential stability of cellular neural network with mixed discrete and distributed delays, in addition, the example is provided to illustrate the applicability of the result.

关键词： global exponential stability cellular neural network mixed discrete and distributed de-lays Lyapunov-Krasovskii functional and Young inequality

Nonlinear feedback control of a novel hyperchaotic system and its circuit implementation

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Chinese Physics B 2010年第3期19卷 150-157页

作者：汪浩祥蔡国梁缪盛田立新 Nonlinear scientific research Center Jiangsu University

This paper reports a new hyperchaotic system by adding an additional state variable into a three-dimensional chaotic dynamical system. Some of its basic dynamical properties, such as the hyperchaotic attractor, Lyapunov expo- nents, bifurcation diagram and the hyperchaotic attractor evolving into periodic, quasi-periodic dynamical behaviours by varying parameter k are studied. An effective nonlinear feedback control method is used to suppress hyperchaos to unstable equilibrium. Furthermore, a circuit is designed to realize this new hyperchaotic system by electronic workbench （EWB）. Numerical simulations are presented to show these results.

关键词： hyperchaos nonlinear feedback control Lyapunov exponents chaos circuit

Cluster synchronization of uncertain complex networks with desynchronizing impulse

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Chinese Physics B 2014年第12期23卷 109-116页

作者：蔡国梁姜胜芹蔡水明田立新 Nonlinear scientific research Center Jiangsu University

Cluster synchronization of nonlinear uncertain complex networks with desynchronizing impulse is explored. First of all, a feedback controller is employed, based on the Lyapunov stability theorem and Lipschitz condition, to guarantee that the uncertain complex networks with desynchronizing impulse synchronize with an object trajectory. Furthermore, a synchronizing impulse controller is presented, which is more efficiently and directly used to achieve the cluster synchronization. Finally, numerical examples are examined to show the effectiveness of the proposed methods.

关键词： uncertain complex networks desynchronizing impulse cluster synchronization

Assessment of Indoor and Outdoor Radon Levels in South Lebanon

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International Journal of Disaster Risk Science 2014年第3期5卷 214-226页

作者： Mohammed A.Kobeissi Omar El Samad Khaled Zahraman Ibrahim Rachidi Lebanese Atomic Energy commission National Council for Scientific ResearchRiad ElsolhBeirutLebanon Department of Physics Faculty of Sciences(I)The Lebanese UniversityHadethBeirutLebanon

The presence of high indoor radon concentrations,Cx,is a major concern of the public *** of indoor radon in South Lebanon have been achieved using CR-39 *** ranged between 30 and 122 Bq m-3 in one of the major towns in the area and are compared with measured atmospheric air *** seasonal variation of Cxindoors has been observed,although 90%of the obtained indoor Cxmeasurements are below 100 Bq *** homes produced Cxreadings above the permissible *** showed that the ventilation effect played a major factor in reducing radon concentration levels *** assessment has been *** effective doses of radon varied from 1.01±0.10 to 8.65±0.50 m Sv a-1 in six homes in one of the four cases *** dosage values are above the permitted limit of 2.5 m Sv *** types of granite contained in the studied homes were identified and their contributions to radon levels indoors were calculated.

关键词： Building materials CR-39 Effective dose Granite exhalation rate Lebanon Radon risk assessment

Boosting Photocatalytic Performance of Cu-Mn Co-doped CeO_(2) Nanoparticles for Tetracycline Degradation

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 42-48页

作者： XU Rongqi MI Jianxin WANG Shulin XU Man ZHU Li BAI Lei TANG Dandan LEI Yu Engineering research Center of Environmental Materials and Membrane Technology of Hubei Province School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China Shaanxi Coal Chemical Industry Technology research Institute Co. Ltd.Xi’an 710100China

Cu-Mn co-doped CeO_(2) photocatalyst was successfully synthesized by the sol-gel method to assess its capability in degrading *** and TEM results showed that Cu and Mn were successfully co-doped into CeO_(2) without forming heterostructure,XPS and photoelectrochemical results revealed that Mn ions doping amplified the generation of photo-induced charge carriers,while Cu ions doping significantly facilitated the interfacial charge transfer ***,the optimized Cu3Mn2CeO_(2) nanoparticles exhibited the highest TC removal efficiency,achieved a rate of 78.18%and maintained a stable cycling performance.

关键词： photocatalyst co-doped charge separation water treatment

Performance of DDA time integration

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Science China(Technological Sciences) 2015年第9期58卷 1558-1566页

作者： LIN ShaoZhong XIE ZhiQiang Changjiang River scientific research Institute research Center on Water Engineering Safety and Disaster Prevention of MWR DDA Center of Changjiang River scientific research Institute

Discontinuous deformation analysis(DDA) is a numerical method for analyzing the deformation of block system. It employs unified dynamic formulation for both static and dynamic analysis, in which the so-called kinetic damping is adopted for absorbing dynamic energy. The DDA dynamic equations are integrated directly by the constant acceleration algorithm of Newmark family integrators. In order to have an insight into the DDA time integration scheme, the performance of Newmark time integration scheme for dynamic equations with kinetic damping is systematically investigated, formulae of stability, bifurcation, spectral radius, critical kinetic damping and algorithmic damping are presented. Combining with numerical examples, recognition and suggestions of Newmark integration scheme application in the DDA static and dynamic analysis are proposed.

关键词： DDA time integration scheme performance analysis critical kinetic damping

Comparison of the effects of different protocols on the particle size distribution of TiO_2 dispersions

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Particuology 2015年第2期13卷 35-44页

作者： Ratna Tantra Aneta Sikora Nanna B.Hartmann Juan Riego Sintes Kenneth N.Robinson National Physical Laboratory European commission DG Joint Research Centre

There is a need to standardize methods associated with the dispersion of nanomaterials in nano（eco）toxicological investigations. The first step toward this goal is to understand the degree of variability that exists in nanomaterial dispersions prepared by using different protocols. Using two case studies, the degree of variability in TiO2 nanomaterial dispersions was assessed by differential centrifugal sedimentation （DCS） methods. Case study 1 addresses the variability that arises from variations within one protocol, investigating the effects of dispersion aging, sonication exposure time, sonication in the presence/absence of an ice bath, material subsampling, particle concentration and having a pre-wetting step. Case study 2 addresses the variability between four different protocols developed through past research activities and projects. The results indicate that there is a large degree of variability （relative standard deviation （RSD） of mean particle diameter = 26%） in the dispersion ofTiO2 nanornaterials between the four different protocols studied and that several steps in a dispersion protocol are potential sources of variation, with final particle concentration being the most significant. The implication of this study is clear： for the purpose of data comparability, there is a need to provide the exact details of all steps involved in a dispersion protocol.

关键词： Nanoparticle Dispersion Protocol Differential centrifugal sedimentation Nano(eco)toxicology

Development and implementation of a validation protocol for crisis maps: reliability and consistency assessment of burnt area maps

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International Journal of Digital Earth 2011年第S1期4卷 8-24页

作者： C.Corbane D.Carrion M.Broglia European commission Joint Research CentreIspraItaly

Validation is an emerging topic in the field of geospatial information for emergency *** the framework of the Global Monitoring for Environment and Security initiative,the Services and Applications for Emergency Response project seeks to implement and validate the pre-operational version of Emergency Response Core *** that context,a dedicated effort has been made in the development and implementation of a comprehensive,productoriented validation protocol tailored to crisis maps and data *** paper presents the approach for validation of crisis maps and its application in the context of rapid mapping of forest fires in Corsica during the summer of *** also discusses the main challenges and the critical aspects of validation of geospatial information in emergency response services.

关键词： validation protocol crisis mapping remote sensing forest fires

Resistance Spot Welding Method for Metal-Based Fiber Bragg Grating Sensors

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Transactions of Nanjing University of Aeronautics and Astronautics 2015年第3期32卷 289-296页

作者：张涛韦朋余岳亚霖 China Ship scientific research Center

Aiming at the requirements of installation and work environment of metal-based fiber Bragg grating(FBG)sensor,a resistance spot welding method is ***,the effect of welding parameters on welding quality is discussed theoretically,and a suitable resistance spot welding method for the metal-based FBG sensor is proposed for the first *** through serial resistance spot welding tests,the feasibility and practicability of the method are verified,and optimal welding parameters for two different tested metals are *** performance test validates FBG sensors installed by the proposed method with good fatigue properties and long-term stable measurement *** research results can provide technical guidance for engineering structure long-term safety monitoring.

关键词： fiber Bragg grating(FBG)sensor resistance spot wel