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Active disturbance rejection control： Applications in aerospace

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Control Theory and Technology 2018年第4期16卷 314-323页

作者： s. e. TALOLe Department of Aerospace engineering Defence Institute of Advanced Technology Girinagar Pune-411 025 India

Control of uncertain dynamical systems has been an area of active research for the past several decades and to this end, various robust control approaches have been proposed in the literature. The active disturbance rejection control （ADRC） represents one prominent approach that has been widely studied and applied for designing robust controllers in diverse areas of engineering applications. In this work, a brief review of the approach and some of its applications in aerospace are discussed. The results show that the approach possesses immense potential to offer viable solution to real-life aerospace problems.

关键词： Active disturbance rejection control uncertainty and disturbance estimation extended state observer robust control

La_(2-x)CexCu_(1-y)Zn_yO_4 perovskites for high temperature water-gas shift reaction

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Journal of Natural Gas Chemistry 2009年第2期18卷 131-138页

作者： s. s. Maluf e. M. Assaf Instituto de Química de so Carlos Universidade de So Paulo Av. Trabalhador Socarlense400 So Carlos SP 13560-970 Brazil

The performance of La2-xCexCu1-yZnyO4 perovskites as catalysts for the high temperature water-gas shift reaction （HT-WGsR） was investigated. The catalysts were characterized by eDs, XRD, BeT surface area, TPR, and XANes. The results showed that all the perovskites exhibited the La2CuO4 orthorhombic structure, so the Pechini method is suitable for the preparation of pure perovskite. However, the La1.90Ce0.10CuO4 perovskite alone, when calcined at 350/700℃, also showed a （La0.935Ce0.065）2CuO4 perovskite with tetragonal struc- ture, which produced a surface area higher than the other perovskites. The perovskites that exhibited the best catalytic performance were those calcined at 350/700℃ and, among these, La1.90Ce0.10CuO4 was outstanding, probably because of the high surface area associated with the presence of the （La0.935Ce0.065）2CuO4 perovskite with tetragonal structure and orthorhombic La2CuO4 phase.

关键词： perovskite shift reaction lanthanum copper cerium

Restructuring of plasmonic nanoparticle aggregates with arbitrary particle size distribution in pulsed laser fields

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Chinese Physics B 2016年第11期25卷 563-570页

作者： A e ershov A P Gavrilyuk s V Karpov s P Polyutov Institute of Computational Modeling Russian Academy of SciencesKrasnoyarsk 660036Russia L.V.Kirensky Institute of Physics of the Russian Academy of sciences Krasnoyarsk 660036Russia siberian Federal University Krasnoyarsk 660028Russia siberian state Aerospace University Krasnoyarsk 660037Russia

We have studied processes of interaction of pulsed laser radiation with resonant groups of plasmonic nanoparticles（resonant domains） in large colloidal nanoparticle aggregates having different interparticle gaps and particle size *** processes are responsible for the origin of nonlinear optical effects and photochromic reactions in multiparticle *** describe photo-induced transformations in resonant domains and alterations in their absorption spectra remaining after the pulse action,we introduce the factor of spectral *** on calculation of changes in thermodynamic,mechanical,and optical characteristics of the domains,the histograms of the spectrum photomodification factor have been obtained for various interparticle gaps,an average particle size,and the degree of *** in spectra have been analyzed depending on the intensity of laser radiation and various combinations of size characteristics of *** obtained results can be used to predict manifestation of photochromic effects in composite materials containing different plasmonic nanoparticle aggregates in pulsed laser fields.

关键词： resonant arbitrary pulsed dipole manifestation alterations extinction remaining aggregate colloidal

Regulator of G protein signaling 6 mediates exercise-induced recovery of hippocampal neurogenesis,learning,and memory in a mouse model of Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2969-2981页

作者： Mackenzie M.spicer Jianqi Yang Daniel Fu Alison N.DeVore Marisol Lauffer Nilufer s.Atasoy Deniz Atasoy Rory A.Fisher Department of Neuroscience and Pharmacology University of Iowa Carver College of MedicineIowa CityIAUSA Iowa Neuroscience Institute University of Iowa Carver College of MedicineIowa CityIAUSA Interdisciplinary Graduate Program in Molecular Medicine University of Iowa Carver College of MedicineIowa CityIAUSA Neural Circuits and Behavior Core University of Iowa Carver College of MedicineIowa CityIAUSA

Hippocampal neuronal loss causes cognitive dysfunction in Alzheimer’s *** hippocampal neurogenesis is reduced in patients with Alzheimer’s *** stimulates adult hippocampal neurogenesis in rodents and improves memory and slows cognitive decline in patients with Alzheimer’s ***,the molecular pathways for exercise-induced adult hippocampal neurogenesis and improved cognition in Alzheimer’s disease are poorly ***,regulator of G protein signaling 6(RGs6)was identified as the mediator of voluntary running-induced adult hippocampal neurogenesis in ***,we generated novel RGs6fl/fl;APP_(sWe) mice and used retroviral approaches to examine the impact of RGs6 deletion from dentate gyrus neuronal progenitor cells on voluntary running-induced adult hippocampal neurogenesis and cognition in an amyloid-based Alzheimer’s disease mouse *** found that voluntary running in APP_(sWe) mice restored their hippocampal cognitive impairments to that of control *** cognitive rescue was abolished by RGs6 deletion in dentate gyrus neuronal progenitor cells,which also abolished running-mediated increases in adult hippocampal *** hippocampal neurogenesis was reduced in sedentary APP_(sWe) mice versus control mice,with basal adult hippocampal neurogenesis reduced by RGs6 deletion in dentate gyrus neural precursor ***6 was expressed in neurons within the dentate gyrus of patients with Alzheimer’s disease with significant loss of these RGs6-expressing ***,RGs6 mediated voluntary running-induced rescue of impaired cognition and adult hippocampal neurogenesis in APP_(sWe) mice,identifying RGs6 in dentate gyrus neural precursor cells as a possible therapeutic target in Alzheimer’s disease.

关键词： adult hippocampal neurogenesis Alzheimer’s disease dentate gyrus exercise learning/memory neural precursor cells regulator of G protein signaling 6(RGs6)

Two-color light-emitting diodes with polarization-sensitive high extraction efficiency based on graphene

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Chinese Physics B 2016年第5期25卷 474-478页

作者： H sattarian s shojaei e Darabi Plasma Physics Research Center Science and Research Branch Islamic Azad University Photonics Department Research Institute for Applied Physics & Astronomy University of Tabriz

In the present study, graphene photonic crystals are employed to enhance the light extraction efficiency（Lee） of two-color, red and blue, light-emitting diode（LeD）. The transmission characteristics of one-dimensional（1D） Fibonacci graphene photonic crystal LeD（FGPC-LeD） are investigated by using the transfer matrix method and the scaling study is presented. We analyzed the influence of period, thickness, and permittivity in the structure to enhance the Lee. The transmission spectrum of 1D FGPC has been optimized in detail. In addition, the effects of the angle of incidence and the state of polarization are investigated. As the main result, we found the optimum values of relevant parameters to enhance the extraction of red and blue light from an LeD as well as provide perfect omnidirectional and high peak transmission filters for the Te and TM modes.

关键词： photonic crystal blue light emitting diode graphene transfer matrix method

Fuzzy rough sets in sostak sense

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Applied Mathematics(A Journal of Chinese Universities) 2022年第4期37卷 563-582页

作者： Ismail Ibedou s.e.Abbas Department of Mathematics Faculty of ScienceBenha UniversityBenhaEgypt Department of Mathematics Faculty of ScienceSohag UniversitySohagEgypt

In this paper,we defined the fuzzy operator Φ_(λ) in a fuzzy ideal approximation space(X,R,I)associated with a fuzzy rough set λ in sostak *** with Φ_(λ),there are fuzzy ideal interior and closure operators int_(Φ)^(λ) and cl_(Φ)^(λ),respectively.r-fuzzy separation axioms,r-fuzzy connectedness and r-fuzzy compactness in fuzzy ideal approximation spaces are defined and compared with the relative notions in r-fuzzy approximation *** are many differences when studying these notions related with a fuzzy ideal different from studying these notions in usual fuzzy approximation ***,using a fuzzy grill,we will get the same results given during the context.

关键词： fuzzy rough set fuzzy approximation space fuzzy ideal approximation space r-fuzzy separation axioms r-fuzzy connectedness r-fuzzy compactness

electron correlation in fast ion-impact single ionization of helium atoms

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Chinese Physics B 2015年第1期24卷 240-246页

作者： e.Ghanbari-Adivi s.eskandari Department of Physics and Isfahan Quantum Optics Group (IQOG) Faculty of Science University of Isfahan Isfahan 81746-73441 Iran

A four-body distorted-wave approximation is applied for theoretical analysis of the fully differential cross sections（FDCs） for proton-impact single ionization of helium atoms in their ground states. The nine-dimensional integrals for the partial amplitudes are analytically reduced to closed-form expressions or some one-dimensional integrals which can be easily calculated numerically. Calculations are performed in the scattering and perpendicular planes. The influence of the target static electron correlations on the process is investigated using a number of different bound-state wave functions for the ground state of the helium targets. An illustrative computation is performed for 75-ke V proton–helium collisions and the obtained results are compared with experimental data and other theoretical predictions. Although for small momentum transfers, the comparison shows a reasonable agreement with experiments in the scattering and perpendicular planes, some significant discrepancies are still present at large momentum transfers in these planes. However, our results are compatible and for some cases, better than those of the other sophisticated calculations.

关键词： single ionization four-body collision distorted-wave approximation electron correlation

Modelling, parameter estimation and assessment of partial shading conditions of photovoltaic modules

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Journal of Modern Power systems and Clean energy 2019年第1期7卷 55-64页

作者： s.LYDeN M.e.HAQUe school of engineering University of Tasmania school of engineering Deakin University

This paper proposes a method for assessing the effect that different features of partial shading conditions(PsC) may have on the operation of a photovoltaic(PV)*** studies, based on an experimentally validated model of a PV system, are used to assess the influence of *** classifications of PsC are defined based on the timescale of their influence on the irradiance experienced by the PV module and the relative location of the voltage at which the global maximum power point occurs is *** case studies are presented to illustrate the application of the proposed PsC assessment *** results have implications for the design of future maximum power point tracking methods.

关键词： Photovoltaic Modelling Partial shading Maximum power point

Landau damping in a dipolar Bose–Fermi mixture in the Bose–einstein condensation(BeC) limit

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Chinese Physics B 2016年第12期25卷 367-376页

作者： s M Moniri H Yavari e Darsheshdar Department of Physics University of Isfahan

By using a mean-field approximation which describes the coupled oscillations of condensate and noncondensate atoms in the collisionless regime, Landau damping in a dilute dipolar Bose-Fermi mixture in the BeC limit where Fermi superfluid is treated as tightly bounded molecules, is investigated. In the case of a uniform quasi-two-dimensional （2D） case, the results for the Landau damping due to the Bose-Fermi interaction are obtained at low and high temperatures. It is shown that at low temperatures, the Landau damping rate is exponentially suppressed. By increasing the strength of dipolar interaction, and the energy of boson quasiparticles, Landau damping is suppressed over a broader temperature range.

关键词： Landau damping mixtures of Bose and Fermi superfluids dipole-dipole interaction