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Deformation correlations,stress field switches and evolution of an orogenic intersection:The Pan-African Kaoko-Damara orogenic junction,Namibia

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Geoscience Frontiers 2017年第6期8卷 1187-1232页

作者： ben Goscombe David A.Foster David Gray ben Wade Antonios Marsellos Jason Titus Integrated Terrane Analysis Research(ITAR) 18 Cambridge RdAldgate5154SAAustralia Department of Geological Sciences University of FloridaGainesvilleFL32611USA School of Earth Sciences University of TasmaniaHobartTASAustralia Adelaide Microscopy University of AdelaideAdelaide5005SAAustralia Hofstra University HempsteadNYUSA

Age calibrated deformation histories established by detailed mapping and dating of key magmatic time markers are correlated across all tectono-metamorphic provinces in the Damara Orogenic *** across structural belts result in an internally consistent deformation framework with evidence of stress field rotations with similar timing,and switches between different deformation *** principle compressive stress rotated clockwise ~180°in total during Kaoko Belt evolution,and^135° during Damara Belt *** most stages,stress field variation is progressive and can be attributed to events within the Damara Orogenic System,caused by changes in relative trajectories of the interacting Rio De La Plata,Congo,and Kalahari *** orogenesis occurred earliest and evolved from collision and obduction at ~590 Ma,involving E-W directed shortening,progressing through different transpressional states with ~45° rotation of the stress field to strike-slip shear under NW-SE shortening at ~550-530 *** orogenesis evolved from collision at ~555-550 Ma with NW-SE directed shortening in common with the Kaoko Belt,and subsequently evolved through ~90°rotation of the stress field to NE-SW shortening at ~512-508 *** Kaoko and Damara orogenic fronts were operating at the same time,with all three cratons being coaxially convergent during the 550-530 Ma period;Rio De La Plata directed SE against the Congo Craton margin,and both together over-riding the Kalahari Craton margin also towards the *** stress field rotation was punctuated by rapid and significant switches at ~530-525 Ma,~508 Ma and ~505 *** three events included:(1)Culmination of main phase orogenesis in the Damara Belt,coinciding with maximum burial and peak metamorphism at 530-525 *** occurred at the same time as termination of transpression and initiation of transtensional reactivation of shear zones in the Kaoko *** compressive stress switched from NW-

关键词： Damara Orogen Stress fields Orogeny Assembly of Gondwana Event geochronology Deformation correlations

Global Exponential Convergence of Neutral Type Competitive Neural Networks with D Operator and Mixed Delay

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Journal of Systems Science & Complexity 2020年第6期33卷 1785-1803页

作者： AOUITI Chaouki ASSALI El Abed ben GHARBIA Imen University of Carthage Faculty of Sciences of BizertaDepartment of MathematicsResearch Units of Mathematics and Applications UR13ES477021 ZarzounaBizertaTunisia

The models of competitive neural network(CNN)was in recent past proposed to describe the dynamics of cortical cognitive maps with unsupervised synaptic modifications,where there are two types of memories:Long-term memories(LTM)and short-term memories(STM),LTM presents unsupervised and slow synaptic modifications and STM characterize the fast neural *** paper is concerned with a class of neutral type CNN’s with mixed delay and D *** employing the appropriate differential inequality theory,some sufficient conditions are given to ensure that all solutions of the model converge exponentially to zero ***,an illustrative example is also given at the end of this paper to show the effectiveness of the proposed results.

关键词： Competitive neural networks D operator exponential convergence neutral type delay

Stochastic Stability of Discrete Time Positive Markov Jump Nonlinear Systems

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Journal of Systems Science & Complexity 2023年第5期36卷 1949-1960页

作者： ZHAO Ping ZHAO Yan SONG Xinmin NIU ben School of Information Science and Engineering Shandong Normal UniversityJinan 250358China School of Mathematical Sciences University of JinanJinan 250022China

This paper investigates the stochastic stability of discrete time positive Markov jump nonlinear systems(PMJNS).Some definitions on stochastic stability for discrete time PMJNS are introduced ***,using the multiply max-separable Lyapunov function method,some stochastic stability criterions of discrete time PMJNS are provided,and some corresponding criterions are also provided for discrete time positive Markov jump linear systems(PMJLS).Different from previous conclusions that require subsystems to be stable or marginally stable,the obtained results allow some subsystems to be *** on the proposed criterions,the stochastic stability behavior of discrete time positive Markov jump systems can be obtained just from the algebraic properties of the system function and the probability characteristics of the Markov *** illustrate the main results,two simulation examples are provided at the end.

关键词： Markov jump system nonlinear system positive system stochastic stability

Engineering porous architectures in multicomponent PdCuBP mesoporous nanospheres for electrocatalytic ethanol oxidation

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Nano Research 2021年第9期14卷 3274-3281页

作者： Hao Lv Yaru Wang Dongdong Xu ben Liu Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool oj Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China College of Chemistry Sichuan UniversityChengdu 610064China

Porous features of mesoporous metal nanocrystals are critically important for their applications in catalysis,sorption,and biomedicine and ***,precisely engineering porous architectures of mesoporous metals is still highly ***,we report a facile soft-templating strategy to precisely engineer porous architectures of multicomponent PdCuBP mesoporous nanospheres(MSs)by using the surfactants with different amphiphilic *** kinds of MSs with distinct porous architectures,including three-dimensional(3D)opened/interconnected dendritic mesopores(dMSs),one-dimensional(1D)cylindered mesopores(cMSs),and zero-dimensional(0D)spherical mesopores(sMSs),are *** surfactant-templating method is generally extended to regulate elemental compositions of multicomponent *** resultant Pd-based MSs have been evaluated as the electrocatalysts for ethanol oxidation reaction(EOR).Our results show that quaternary PdCuBP dMSs display remarkably high catalytic activity and better stability for electrocatalytic EOR,compared to those of multicomponent MSs with other porous architectures and less elemental *** studies reveal that PdCuBP dMSs combine multiple structural and compositional advantages,which kinetically accelerate the electron/mass transfers and also improve the tolerances to poisoning *** believe that the porous architecture engineering in mesoporous metal electrocatalysts will present a new way to design highly efficient electrocatalysts with desired porous systems and explore their relations towards(electro)catalysis.

关键词： porous architectures multicomponent alloys mesoporous nanosphere surfactant electrocatalysis

Neural stem cell replacement: a possible therapy for neurodevelopmental disorders?

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Neural Regeneration Research 2015年第2期10卷 180-182页

作者： Michael Telias Dalit ben-Yosef Wolfe PGD-Stem Cell Lab Racine IVF Unit Lis Maternity Hospital Tel Aviv Sourasky Medical Center Department of Cell and Developmental Biology Sackler Medical School Tel Aviv University

Neurodevelopmental disorders are characterized by an abnormal development of the central nervous system, leading to a myriad of symptoms and diseases, including intellectual disability, attention deficits, impairments in learning and memory, speech disorders and repetitive behavior （Telias and ben-Yosef, 2014）. Common major neurodevelopmental disorders include autism and autism spectrum disorders （ASDs）, fragile X syndrome （FXS）, Down syndrome （DS）, and Rett syndrome （RTT）. They can be collectively described as disorders in which the plasticity of the brain has been severely impaired. The concept of plasticity refers to the brain＇s ability to adapt to and process new information and react accordingly, and it can be classified into three categories： a） molecular plasticity, whenever specific receptors, ion channels, enzymes,

关键词： NSCs a possible therapy for neurodevelopmental disorders Neural stem cell replacement stem cell

Historical Dataset Reconstruction and a Prediction Method of Solar 10.7cm Radio Flux

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Chinese Journal of Astronomy and Astrophysics 2008年第4期8卷 472-476页

作者： Juan Zhao Yan-ben Han Department of Astronomy Beijing Normal University Beijing 100875 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

We reconstruct the developing history of solar 10.7 cm radio flux （F10.7） since 1848, based on the yearly sunspot number and the variations. A relationship between the maximum and the linear regression slope of the first 3 years starting from minimum of the solar cycle is considered. We put forward a method of predicting the maximum of F10.7 by means of the slope-maximum relationship. Running tests for cycles 19 to 23 indicate that the method can properly predict the peak of F10.7.

关键词： Sun activity -- Sun radio radiation - Sun sunspots

Special topic on research frontier in polymer science in China

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Science China Chemistry 2016年第12期59卷 1529-1530页

作者： Anjun Qin ben Zhong Tang State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640. China Department of Chemistry Hong Kong Branch of National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science & Technology Clear Water Bay Kowloon Hong Kong China

Polymer science is a multiple discipline that studies synthe- sis, structure, function and application of macromolecules. It encompasses subdisciplines of polymer chemistry, phys- ics and engineering. Despite the fact... 详细信息

关键词： Special topic on research frontier in polymer science in China

Decoding OvTDM with sphere-decoding algorithm

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 35-39页

作者： JIN Xin LI Dao-ben Key Laboratory of Information Processing and Intelligent Technology Beijing University of Posts and Telecommunications Beijing 100876 China

Overlapped time division multiplexing （OvTDM） is a new type of transmission scheme with high spectrum efficiency and low threshold signal-to-noise ratio （SNR）. In this article, the structure of OvTDM is introduced and the sphere-decoding algorithm of complex domain is proposed for OvTDM. Simulations demonstrate that the proposed algorithm can achieve maximum likelihood （ML） decoding with lower complexity as compared to traditional maximum likelihood sequence demodulation （MLSD） or viterbi algorithm （VA）.

关键词： OvTDM MLSD sphere-decoding

Local nonlinear unknown input observer

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控制理论与应用（英文版） 2013年第3期11卷 517-520页

作者： Ramzi ben MESSAOUD Mekki KSOURI Department of Electrical Engineering National Engineering School of TunisBox 37 1002 Tunis Tunisia

This paper proposes a new nonlinear unknown input observer. The observer design approach utilizes the first order Taylor expansion. The observer gains are then obtained by a systematic method. In this paper, we added some improvements to this method. The developed approach also can enable observer design for a large class of differentiable nonlinear systems. The necessary and sufficient conditions for the existence of the observer are given. A numerical example is given to illustrate the attractiveness and the simplicity of the new design procedure.

关键词： Unknown inputs observers Stability Nonlinear systems Robust and state estimation