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sYNCHRONIZATION OF MAsTER-sLAVE MARKOVIAN sWITCHING COMPLEX DYNAMICAL NETWORKs WITH TIME-VARYING DELAYs IN NONLINEAR FUNCTION VIA sLIDING MODE CONTROL

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Acta Mathematica scientia 2017年第2期37卷 368-384页

作者： M.syed ALI j.YOGAMBIGAI 曹进德 Department of Mathematics Thiruvalluvar UniversityVellore 632115Tamil NaduIndia Department of Mathematics Southeast UniversityNanjing 210096China Department of Mathematics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

In this article, a synchronization problem for master-slave Markovian switching complex dynamical networks with time-varying delays in nonlinear function via sliding mode control is investigated. On the basis of the appropriate Lyapunov-Krasovskii functional, introducing some free weighting matrices, new synchronization criteria are derived in terms of linear matrix inequalities （LMIs）. Then, an integral sliding surface is designed to guarantee synchronization of master-slave Markovian switching complex dynamical networks, and the suitable controller is synthesized to ensure that the trajectory of the closed-loop error system can be driven onto the prescribed sliding mode surface. By using Dynkin＇s formula, we established the stochastic stablity of master-slave system. Finally, numerical example is provided to demonstrate the effectiveness of the obtained theoretical results.

关键词： Markovian switching complex dynamical networks Lyapunov-Krasovskii method sliding mode control Linear Matrix Inequality

The function of animal ‘eyespots’:Conspicuousness but not eye mimicry is key

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Current Zoology 2009年第5期55卷 319-326页

作者： Martin sTEVENs Abi CANTOR julia GRAHAM Isabel s.WINNEY Department of Zoology University of CambridgeDowning Street

Many animals are marked with conspicuous circular features often called ＇eyespots＇, which intimidate predators, preventing or halting an attack. It has long been assumed that eyespots work by mimicking the eyes of larger animals, but recent experiments have indicated that conspicuousness and contrast is important in eyespot function, and not eye mimicry. We undertake two further experiments to distinguish between the conspicuousness and mimicry hypotheses, by using artificial prey presented to wild avian predators in the field. In experiment 1, we test if eyespot effectiveness depends on the marking shape （bar or circle） and arrangement （eye-like and non-eye-like positions）. We find no difference between shapes or arrangement; all spots were equally effective in scaring birds. In experiment 2, we test if the often yellow and black colors of eyespots mimic the eyes of birds of prey. We find no effect of shape, and no advantage to yellow and black spots over non-eye-like but equally conspicuous colors. The consistent finding is that eyespot function lies in being a conspicuous signal to predators, and not necessarily due to eye mimicry [ Current Zoology 55 （5）： 319 - 326, 2009].

关键词： Eyespots Conspicuousness Mimicry Predation Protective coloration

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磁性材料

磁性材料

柴油机油烟的燃烧:其可溶有机组分含量对动力学参数的影响(英文)

作者： R.s.·特贝尔(R.s. Tebble) D.j.·克雷克(D.j. Craik)

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新型炭材料 2003年第1期18卷 15-19页

作者： s.Collura N.Chaoui A.Koch j.V.Weber Laboratoire de Chimie et Applications Laboratoire de Chimie et ApplicationsLaboratoire de Chimie et ApplicationsLaboratoire de Chimie et Applications A 3471 Université de Metz Rue Victor Demange 57500 Saint-Avold FranceA 3471 Université de Metz Rue Victor Demange 57500 Saint-Avold FranceA 3471 Université de Metz Rue Victor Demange 57500 Saint-Avold FranceA 3471 Université de Metz Rue Victor Demange 57500 Saint-Avold France

　论述了两种可溶有机组分含量(8w %,25w %)的柴油机油烟的燃烧机理。采用加热速率5℃ min～20℃ min非等温条件下的热重分析(TGA),考察了其在空气中的燃烧。应用Ozawa Flynn Wall方法,研究了析出物质的数据资料,并由复变非线性回归方... 详细信息

　论述了两种可溶有机组分含量(8w %,25w %)的柴油机油烟的燃烧机理。采用加热速率5℃ min～20℃ min非等温条件下的热重分析(TGA),考察了其在空气中的燃烧。应用Ozawa Flynn Wall方法,研究了析出物质的数据资料,并由复变非线性回归方法获得了各动力学参数。两种油烟的析出可根据三段机理予以模定,即:(1)可溶有机组分(sOF)的蒸发,(2)sOF热裂解,(3)炭基质燃烧。由于两种油烟所得的动力学参数非常近似,表明sOF含量对基质燃烧的影响极其有限。

关键词：柴油机油烟热重分析燃烧动力学可溶有机组分参数

Microbial roles equivalent to geological agents of high temperature and pressure in deep Earth

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science China Earth sciences 2016年第11期59卷 2098-2104页

作者： XIE shuCheng LIU Deng QIU Xuan HUANG XianYu Thomas j.ALGEO state Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Laboratory of Critical Zone Evolution School of Earth Sciences China University of Geosciences state Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Department of Geology University of Cincinnati

Microbes not only show sensitive responses to environmental changes but also play important roles in geochemical and geophysical systems. It is well known that microbes have caused major changes in surface environments and biogeochemical cycles through Earth history. Microbial processes can also induce the synthesis of certain minerals under Earth-surface conditions that previously were believed to form only under high temperatures and pressures in the deep Earth. For example, microbes can promote the conversion of smectite to illite, synthesis of authigenic plagioclase, precipitation of dolomite, and biotransformation of geolipids. These effects of microbes are due to their large surface/volume ratios, enzyme production, and abundant functional groups. Microbial catalyzation of chemical reactions proceeds through reaction-specific enzymes, a decrease in Gibbs' s free energy, and/or break through the dynamics reaction thresholds via their metabolisms and physiology. Microbes can lower the surface free energy of mineral nuclei via biophysical adsorption due to their large surface/volume ratios and abundant functional groups. The mineral precipitation and transformation processes induced by microbes are functionally equivalent to geological processes operating at high temperatures and pressures in the deep Earth, suggesting that microbial processes can serve as analogs to deep abiotic processes that are difficult to observe.

关键词： Geobiology Microbial functional groups Illitization Plagioclase Dolomite Geolipids

Effect of Intercropping Pattern on stem Borer Infestation in Pearl Millet (<em>Pennisetum glaucum</em>L.) Grown in the Nigerian sudan savannah

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Advances in Entomology 2014年第2期2卷 81-86页

作者： M. M. Degri D. M. Mailafiya j. s. Mshelia Department of Agronomy Faculty of Agriculture Federal University Kashere Gombe Nigeria Department of Crop Protection Faculty of Agriculture University of Maiduguri Maiduguri Nigeria

Fields experiments were conducted at the Department of Crop Protection, Faculty of Agriculture, University of Maiduguri Teaching and Research Farm, Maiduguri during 2010 and 2011 cropping seasons to investigate the effects of intercropping pattern on stem borer pest infestation in pearl millet (Pennisetum glaucum L.) intercropped with ground nut (Arachis hypogea L.). A split-plot design was used to test the intercrop pattern of 1:0 ratio (sole millet), 1:1 ratio (1 millet row to 1 ground nut row), 2:1 ratio (2 millet rows to 1 ground nut row) and 1:2 ratio (1 millet row to 2 ground nut rows). The results obtained showed that the intercrop pattern of 1:2 ratio and 1:1 ratio yielded less stem borer infestation and abundance in pearl millet, and as well supported high panicle weight and grain yield. In addition to recommending either of these two intercropping patterns to pearl millet farmers for more effective stem borer pest management, results further show the need for identification of effective intercropping patterns in other cropping systems.

关键词： Pearl Millet stem Borer Intercropping sudan savannah

Estimation of boundary-layer flow of a nanofluid past a stretching sheet: A revised model

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journal of Hydrodynamics 2016年第4期28卷 596-602页

作者： Naeema IsHFAQ Zafar Hayat KHAN Waqar Ahmad KHAN Richard j.CULHAM school of Mathematical sciences Peking University Department of Mathematics University of MalakandDir (Lower) Department of Mechanical and Industrial Engineering College of EngineeringMajmaah University Department of Mechanical Engineering University of Waterloo

The previous model for the boundary layer nanofluid flow past a stretching surface with a specified nanoparticle volume fraction on the surface is *** major limitation of the previous model is the active control of the nanoparticle volume fraction on the *** a revised model proposed in this paper,the nanoparticle volume fraction on the surface is passively controlled,which accounts for the effects of both the Brownian motion and the thermophoresis under the boundary condition,whereas the Buongiorno＇s model considers both effects in the governing *** assumption of zero nanoparticle flux on the surface makes the model physically more *** the revised model,the dimensionless heat transfer rates are found to be higher whereas the dimensionless mass transfer rates are identically zero due to the passive boundary *** is also found that the Brownian motion parameter has a negligible effect on the Nusselt number.

关键词： stretching Brownian dimensionless revised identically governing realistic physically electrically negligible

NOx Reduction and Desorption studies Under Electric Discharge Plasma Using a simulated Gas Mixture:A Case study on the Effect of Corona Electrodes

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Plasma science and Technology 2009年第3期11卷 327-333页

作者： K.YOsHIDA B.s.RAjANIKANTH M.OKUBO Plasma and Environmental Engineering Laboratory Department of Electrical and Electronic Systems EngineeringOsaka Institute of Technology High Voltage Laboratory Department of Electrical EngineeringIndian Institute of Science Environmental Protection Engineering Laboratory Department of Mechanical EngineeringOsaka Prefecture University

In this study, reduction and desorption of oxides of nitrogen （NOx） were conducted using an electrical discharge plasma technique. The study was carried out using a simulated gas mixture to explore the possibility of re-generation of used adsorbents by a nonthermal plasma desorption technique. Three different types of corona electrodes, namely, pipe, helical wire, and straight wire, were used for analyzing their effectiveness in NOx reduction/desorption. The pipe- type corona electrode exhibited a nitric oxide （NO） conversion of 50%, which is 1.5 times that of the straight-wire-type electrode at an energy density of 175 j/L. The helical-wire-type corona electrode exhibited a NOx desorption efficiency almost 4 times that of the pipe-type electrode, indicating the possibility that corona-generated species play a crucial role in desorption.

关键词： NOx reduction nonthermal plasma electric discharge application NOx desorption

The Transformation of the Heterogeneous Materials under the Fatigue Deformation

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Materials sciences and Applications 2012年第6期3卷 398-407页

作者： s. Kh. shamirzaev j. K. Ziyovaddinov sh. B. Karimov Physical Technical Institute of Uzbek Academy of sciences Tashkent Republic of Uzbekistan

The objects of our paper are aluminum alloy samples (AAss) contained the different amount of Cu, Mn, Mg, si and Li. We are modeling the features of microstructure of potential relief of an AAs and studying its transformation under both imposed fatigue deformation and wetted by liquid metals (Ga;or Hg;Li;In). We illustrate the main ideas by using only the “time series” allied with effective internal friction Q-1eff of an AAs. AAss like B-95 or 7075 are heterogeneous materials for which the more energy can be absorbed by selected micro-regions of a tested sample. so micro-crack in the space of AAs and alarm state of AAs arises. Each micro-region will to contribute the Q-1k (the internal friction Q-1k belong to k-th micro-region) to the effective internal friction— Q-1eff accordance with fit statistic . We find a number of micro-regions—L and series gk & Qk from the experimental data like as the internal friction (Q-1)eff versus both the number of cycles—N and the deformation—е. series gk & Qk (k=1,2,3,...,L) present the microstructures of AAss. In this paper also is presented the original technology to forecast fatigue damage of an AAs. Here the fatigue sensitive element (FsE) used. We made multiphase heterogeneous mixtures (MHMs) which contents a variable volume of initial components. It is selected MHMs are using for produce FsEs. The present paper is aimed to establish the correlation of the FsEs microstructures changes and corresponding changes of the aluminum alloy microstructures at imposing the same spectra deformation on both of them. A change of FsEs microstructure investigated by using their effective electrical resistance Reff data.

关键词： Amplitude-Dependent Internal Friction Fatigue Cracking Process Alarm state Fatigue sensitive Element