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Dynamic interaction between clustered liquid propellant rocket engines under their asynchronous start-ups

Propulsion and Power Research 2021年第4期10卷 347-359页

作者： Sergey I.Dolgopolov Olexiy D.Nikolayev nataliia v.khoriak Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine 15Leshko-Popel Str.Dnepr49600Ukraine

A nonlinear mathematical model of the low-frequency dynamics of the clustered multi-engine rocket propulsion system has been developed and the computations of the engine transient processes during the start-ups of the four-engine propulsion system with a shared feed system have been made *** on propulsion system start-up modeling the influence of the connectivity of engines in a cluster on the starting characteristics of individual engines is *** particular,an advanced nonlinear mathematical model of the pump cavitation phenomena is a distinctive feature of the mathematical *** computation results showed that the asynchronous engines start-ups during rocket lift-off lead to severely nonlinear engine transients and clustered engine thrust *** influence of the rocket engines asynchronous start-ups on the clustered feed system transients depends on many factors,mainly on from the clustered feed system low-frequency dynamics,the magnitude of the disturbance and the phase difference between disturbances acting on different branches of the feed *** deep lingering dips in the flow rate and pressure transients are possible due to the nonlinear dynamic interaction of the *** case of great pressure dips at the pump inlet(up to the pressure of saturated vapors during significant periods of start-up time)the cavitation breakdowns of the pumps of one or more engines from the cluster are *** can disrupt the operation of the entire propulsion system and leads to the failure of the launch vehicle mission.

关键词： Liquid propellant rocket engine Clustered engine thrust misbalance Nonlinear mathematical model Start-up transient Pump cavitation model Low-frequency processes Start-up sequence Shared feed system

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Trace amine-associated receptors at the cross-road between innate olfaction of amines, emotions, and adult neurogenesis

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Neural Regeneration Research 2022年第6期17卷 1257-1258页

作者： Evgeniya v.Efimova nataliia v.Katolikova Evgeny v.Kanov Raul R.Gainetdinov Institute of Translational Biomedicine and Saint Petersburg University Hospital Saint Petersburg State UniversitySaint PetersburgRussia

Trace amines are the class of endogenous biogenic amines that traditionally include beta-phenylethylamine,p-tyramine,tryptamine,octopamine,and o *** t race amines represent products of amino acids decarboxylation by bacterial decarboxylases during tissue putrefaction or by endogenous decarboxylases in the *** of trace amines by gut microbiota is also known(Berry et al.,2017;Gainetdinov et al.,2018).Thus,trace amines are enriched during the decomposition of proteins and concentrated in certain bodily fluids.

关键词： amines Berry concentrated

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Effect of CeO_2 and Al_2O_3 on the activity of Pd/Co_3O_4/cordierite catalyst in the three-way catalysis reactions(CO/NO/C_nH_m)

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Journal of Environmental Sciences 2012年第7期24卷 1327-1333页

作者： Sergiy O.Soloviev Pavlo I.Kyriienko nataliia O.Popovych L.v.Pisarzhevsk Institute of Physical Chemistry National Academy of Sciences of Ukraine

The present article studies the effect of CeO2 and A1203 on the activity of Pd/Co304/cordierite catalyst in conversion of NO, CO, CnHm. The catalysts were characterized by temperature programmed reduction with hydrogen, X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. It is shown that the effect of CeO2 on the properties of Pd/C03 O4/cordierite catalyst depends on preparation method. The catalyst obtained by co-deposition of cerium and cobalt oxides has higher activity in CO oxidation （CO ＋ 02 and CO ＋ NO） and total hexane oxidation （C6H14 ＋ 02）. Such phenomenon is probably caused by more than stoichiometric amount of formed oxygen vacancies, an increase in both mobility of surface oxygen and dispersity of components in the catalytic composition. It is demonstrated that CeO2 addition promotes the SO2 resistance of Pd/C03 O4/cordierite. The second support decreases the activity of Pd/Co3Oa/cordierite catalyst in the reactions of CO and C6H14 with oxygen because of COA1204 formation.

关键词： metal-oxide catalysts structured catalysts effect of CeO2 and A1203 CO NO CnH,. conversion

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TOLs Function as Ubiquitin Receptors in the Early Steps of the ESCRT Pathway in Higher Plants

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Molecular Plant 2020年第5期13卷 717-731页

作者： Jeanette Moulinier-Anzola Maximilian Schwihla Lucinda De-Araujo Christina Artner Lisa Jorg nataliia Konstantinova Christian Luschnig Barbara Korbei Institute of Molecular Plant Biology Department of Applied Genetics and Cell BiologyUniversity of Natural Resources and Life SciencesVienna(BOKU)Muthgasse 181190 ViennaAustria Department of Molecular Toxicology and Environment Biotechnology Center-Eduardo Mondlane UniversityAv.de MocambiqueKm 1.5.MaputoMozambique Institute of Science and Technology Austria(1ST Austria) Am Campus 13400 KlosterneuburgAustria

Protein abundance and localization at the plasma membrane(PM)shapes plant development and mediates adaptation to changing environmental *** is regulated by ubiquitination,a post-translational modification crucial for the proper sorting of endocytosed PM proteins to the vacuole for subsequent *** understand the significance and the variety of roles played by this reversible modification,the function of ubiquitin receptors,which translate the ubiquitin signature into a cellular response,needs to be *** this study,we show that TOL(TOM1-like)proteins function in plants as multivalent ubiquitin receptors,governing ubiquitinated cargo delivery to the vacuole via the conserved Endosomal Sorting Complex Required for Transport(ESCRT)***2 and TOL6 interact with components of the ESCRT machinery and bind to K63-linked ubiquitin via two tandemly arranged conserved ubiquitin-binding *** of these domains results not only in a loss of ubiquitin binding but also altered localization,abolishing TOL6 ubiquitin receptor *** and localization of TOL6 is itself regulated by ubiquitination,whereby TOL6 ubiquitination potentially modulates degradation of PM-localized cargoes,assisting in the fine-tuning of the delicate interplay between protein recycling and *** together,our findings demonstrate the function and regulation of a ubiquitin receptor that mediates vacuolar degradation of PM proteins in higher plants.

关键词： ubiquitination ESCRT pathway ubiquitin receptor plasma membrane protein degradation

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Web service for biodiversity estimation using remote sensing data

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International Journal of Digital Earth 2008年第4期1卷 367-376页

作者： Mikhail A.Popov nataliia N.Kussul Sergey A.Stankevich Anna A.Kozlova Andrii Yu.Shelestov Oleksii M.Kravchenko Mykhailo B.Korbakov Serhiy v.Skakun Scientific Centre for Aerospace Research of the Earth KievUkraine Department of Space Information Technologies and Systems Space Research Institute NASU-NSAUKievUkraine

This paper presents a technique for the assessment and mapping of land biodiversity by using remote sensing *** proposed approach uses a fuzzy model that encapsulates different ecological factors influencing *** imple... 详细信息

关键词： potential biodiversity index remote sensing data product pre-Black Sea region of the Ukraine web service

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Fano-Resonant Hybrid Metamaterial for Enhanced Nonlinear Tunability and Hysteresis Behavior

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Research 2021年第1期2021卷 597-605页

作者： Yuancheng Fan Xuan He Fuli Zhang Weiqi Cai Chang Li Quanhong Fu nataliia v.Sydorchuk Sergey L.Prosvirnin Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information Technology and School of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710129China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Institute of Radio Astronomy National Academy of Sciences of UkraineKharkiv 61002Ukraine Karazin Kharkiv National University Kharkiv 61077Ukraine

Artificial resonant metamaterial with subwavelength localized filed is promising for advanced nonlinear photonic *** this article,we demonstrate enhanced nonlinear frequency-agile response and hysteresis tunability in a Fano-resonant hybrid metamaterial.A ceramic cuboid is electromagnetically coupled with metal cut-wire structure to excite the high-Q Fano-resonant mode in the dielectric/metal hybrid *** is found that the significant nonlinear response of the ceramic cuboid can be employed for realization of tunable metamaterials by exciting its magnetic mode,and the trapped mode with an asymmetric Fano-like resonance is beneficial to achieve notable nonlinear modulation on the scattering *** nonlinear tunability of both the ceramic structure and the ceramic/metal hybrid metamaterial is promising to extend the operation band of metamaterials,providing possibility in practical applications with enhanced light-matter interactions.

关键词： spectrum resonant nonlinear

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Grouting of Waste of the Baikal Pulp and Paper Mill to Reduce the Technogenic Impact to the Baikal Lake Ecosystem

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Journal of Geoscience and Environment Protection 2020年第11期8卷 112-118页

作者： Eugene N. Samarin nataliia S. Kravchenko Oleg v. Zerkal Michael S. Chernov Irina A. Rodkina Geological Faculty Lomonosov Moscow State University Moscow Russia

Research is devoted to the problem of recycling waste of the Baikal Pulp and Paper Mill, whose activity has caused serious damage to the ecological environment of Lake Baikal and its environs. Grouting waste production is currently the most effective possible decision to the problem of pollutants, such as sludge-lignin and ash, in water objects and groundwater. The results on the grouting of liquid and solid waste from the Baikal Pulp and Paper Mill, represented by sludge lignin and ash, are presented. Cement, liquid glass, colloidal silica, ammonium persulfate, hydrogen peroxide were used as the main hardeners. Samples were formed by mixing the original waste with astringent. The strength in time, shrinkage, resistance to water were studied. Samples formed on the basis of colloidal silica solution have a maximum uniaxial compressive strength of 0.4 - 0.5 MPa, on the basis of liquid glass—0.2 - 0.3 MPa. Adding fine sand increases the strength by 1.5 - 1.7 times. Samples based on ammonium persulfate and hydrogen peroxide do not have sufficient strength. Adding fine quartz sand increases the strength up to 1.0 - 1.2 MPa.

关键词： Grouting Sludge-Lignin Colloidal Silica Liquid Glass Pollution of Lake Baikal

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部分阴影条件下的光伏发电系统最大功率点跟踪方法的比较

部分阴影条件下的光伏发电系统最大功率点跟踪方法的比较

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作者：娜塔莎（Shcherbyna nataliia）兰州交通大学

学位级别：硕士

太阳能是取之不尽用之不竭的清洁能源,因此,太阳能发电具有良好的经济性以及环境友好性。尽管在光伏发电发展的过程中,对光伏电池的改进已经取得了很大进展,但光伏电池组件的整体效率仍然较低。在光伏电池组件的伏安特性(vAC)曲线上,有... 详细信息

太阳能是取之不尽用之不竭的清洁能源,因此,太阳能发电具有良好的经济性以及环境友好性。尽管在光伏发电发展的过程中,对光伏电池的改进已经取得了很大进展,但光伏电池组件的整体效率仍然较低。在光伏电池组件的伏安特性(vAC)曲线上,有一个特殊坐标(UMPP,IMPP),是光伏电池输出功率的最大值。因此,为了在光伏系统中达到光伏电池组件效率最优,有必要使用最大功率点跟踪算法来监测该点的最大功率,以便在这些条件下将光伏电池组件的最大功率传输到负荷。论文研究目标如下:(1)分析目前光伏系统常见的研究方法,研究了不同天气情况对系统的影响,如太阳辐射的变化程度(部分阴影条件);(2)分析现有的基于传统和人工逻辑的最大功率点跟踪法,例如:干扰观测法,增量电导法,模糊逻辑和基于人工神经网络的最大功率点跟踪法;(3)研究和开发了光伏板的等效电路模型和升降压变换器;(4)基于最大功率点跟踪法在Matlab/Simulink平台设计在四种不同辐射水平(部分阴影条件)下研究光伏系统的方案;(5)对四种最大功率点跟踪法进行动态分析和对比。针对上述的目标,应用I-v和P-v特性理论建立了光伏系统数学模型,在Matlab/Simulink中进行了仿真验证。研究成果如下所示:(1)在建立光伏系统等效电路模型中应用了I-v和P-v特性理论;(2)在光伏系统模型中描述并实现了最大功率点跟踪法;(3)在Matlab/Simulink中建立了基于四种不同辐射水平(部分阴影条件)的最大功率点跟踪法的光伏系统的模型;(4)对四中不同辐射水平下的最大功率点跟踪法进行了比较。

关键词：光伏发电部分阴影的条件最大功率点跟踪模块阵列

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Fetal stem cells are effective in the treatment of Grade Ⅰ and Ⅱrespiratory failure in amyotrophic lateral sclerosis and muscular dystrophy

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Translational Neuroscience and Clinics 2015年第1期1卷 10-16页

作者： nataliia.S..Sych Olena.v..Ivankova Mariya.O..Klunnyk Iryna.G..Matiyashchuk Andrey.A..Sinelnyk Mariya.P..Demchyk Maryna.v..Skalozyb Dario.Siniscalco Department of Clinical Cell Therapy Center Em Cell Department of Skalozyb‐Biotechnology Cell Therapy Center Em Cell Department of Experimental Medicine Second University of Naples via S.Maria di Costantinopoli 16

Objectives: To study the effect of fetal stem cell(FSC) therapy on Grade Ⅰ and Ⅱrespiratory failure in patients with amyotrophic lateral sclerosis(ALS) and muscular dystrophy(MD). Methods: A comparative study was conducted on 41 patients with Grade Ⅰ or Ⅱrespiratory failure(RF) resulting from ALS or MD. The patients were divided into 4 groups according to the underlying disease and the degree of RF. Patients underwent combined treatment, including the experimental application of FSC therapy, and were examined before FSC treatment, and 6 months and 12 months after treatment. Results: FSC treatment improved both subjective and objective breathing parameters as early as 6 months post‐treatment. A significant increase in the forced vital capacity(FvC) and forced expiratory volume in 1 second(FEv1) was reported by all patients with grade Ⅰ RF linked to ALS and MD compared to baseline. Patient respiratory improvement was maintained over the next 6 months. Grade Ⅱ RF patients with MD reported a significant improvement in FvC 12 months after treatment. Conclusions: Evidence for respiratory improvement was observed as early as 6 months in all patients after combined treatment including FSC therapy, and this was maintained for a further 6 months after therapy. In MD patients with Grade Ⅱ RF, treatment resulted in a significant FvC and FEv1 increase within 6 months and downgrading to Grade Ⅰ RF within a year after FSC treatment.

关键词： respiratory failure amyotrophic lateral sclerosis muscular dystrophy fetal stem cells forced vital capacity forced expiratory volume

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