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Ballistic performance of titanium-based layered composites made using blended elemental powder metallurgy and hot isostatic pressing

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Defence Technology（防务技术） 2024年第9期39卷 1-14页

作者： Pavlo Markovsky Jacek Janiszewski Dmytro Savvakin oleksandr Stasyuk Bartosz Fikus Victor Samarov Vianey Ellison Sergey V.Prikhodko G.V.Kurdyumov Institute for Metal Physics of N.A.S.of Ukraine 36Academician Vernadsky BoulevardUA-03142 KyivUkraine Jarosław Dabrowski Military University of Technology 2Gen.Sylwester Kaliski Str.00e908 Warsaw 46Poland Synertech Inc. 11711 Monarch Street Garden GroveLos AngelesCA 92841USA Department of Materials Science and Engineering University of California Los AngelesLos AngelesCA 90095USA

Metal matrix composites tiles based on Ti-6Al-4V(Ti64)alloy,reinforced with 10,20,and 40(vol%)of either TiC or TiB particles were made using press-and-sinter blended elemental powder metallurgy(BEPM)and then bonded together into 3-layer laminated plates using hot isostatic pressing(HIP).The laminates were ballistically tested and demonstrated superior *** microstructure and properties of the laminates were analyzed to determine the effect of the BEPM and HIP processing on the ballistic properties of the layered *** effect of porosity in sintered composites on further diffusion bonding of the plates during HIP is analyzed to understand the bonding features at the interfaces between different adjacent layers in the *** ballistic performance of fabricated structures was explained by a significant reduction in the residual porosity of the BEPM products by their additional processing using HIP,which provides an unprecedented increase in the hardness of the layered *** is argued that the combination of the used two technologies,BEPM and HIP is principally complimentary for the materials in question with the abilities to solve the essential problems of each used individually.

关键词： Metal matrix composites Powder metallurgy Titanium hydride powder Master alloy Titanium carbide Titanium boride Hot isostatic pressing Ballistic tests

Glaser Coupling of Substituted Anthracene Diynes on a Non-metallic Surface at the Vapor-Solid Interface

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Chemical Research in Chinese Universities 2021年第5期37卷 1143-1148页

作者： FENG Yuan HEYDARI Zahra LIU Chenghao ZHANG Nianyue CUCCIA Louis A. IVASENKO oleksandr PEREPICHKA Dmitrii F. Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhou215123P.R.China Department of Chemistry McGill University801 Sherbrooke Street WestMontrealQuébecH3A 0B8Canada Division of Molecular Imaging and Photonics Department of ChemistryKU Leuven-University of LeuvenCelestijnenlaan 200FB-3001LeuvenBelgium Department of Chemistry and Biochemistry Concordia University7141 Sherbrooke St.W.MontrealQuébecH4B 1R6Canada

The direct polymerization via irreversible C-C coupling on inert substrates will give access to new low-dimensional advanced functional materials and simplify their industrial *** this work,we present our initial results in the application of Glaser coupling to the direct on-surface polymerization of a model diacetylene compound at the solid-vapor *** self-assembly of the monomer and polymerization products was characterized using scanning tunneling microscopy(STM).In addition,selected optical properties and the electronic structure of all compounds were investigated.

关键词： polymerization coupling metallic

Targeting the “undruggable” RAS - new strategies - new hope?

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Cancer Drug Resistance 2019年第3期2卷 813-826页

作者： Britta Mörchen oleksandr Shkura Raphael Stoll Iris Helfrich Skin Cancer Unit of the Dermatology Department Medical FacultyUniversity Duisburg-EssenWest German Cancer CenterEssen 45147Germany German Cancer Consortium(DKTK)partner site Düsseldorf/Essen Essen 45147Germany Biomolecular NMR Faculty of Chemistry and BiochemistryRuhr University of BochumBochum D-44780Germany

K-RAS is the most frequently mutated oncogene in solid tumors,such as pancreatic,colon or lung *** GTPase K-RAS can either be in an active(GTP-loaded)or inactive(GDP-loaded)*** its active form K-RAS forwards signals from growth factors,cytokines or hormones to the nucleus,regulating essential pathways,such as cell proliferation and *** turn,activating somatic mutations of this proto-oncogene deregulate the complex interplay between GAP(GTPase-activating)-and GEF(Guanine nucleotide exchange factor)-proteins,driving neoplastic *** to a rather shallow surface,K-RAS lacks proper binding pockets for small molecules,hindering drug development over the past thirty *** review summarizes recent progress in the development of low molecular antagonists and further shows insights of a newly described interaction between mutant K-RAS signaling and PD-L1 induced immunosuppression,giving new hope for future treatments of K-RAS mutated cancer.

关键词： K-RAS small molecules immune checkpoints PD-1 PD-L1

Interpretations of St. Francis of Assisi in the 20th Century： Philosophical-Anthropological Perspective

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History Research 2015年第1期5卷 12-27页

作者： oleksandr Golozubov National Technica University Kharkiv Ukraine

The article deals with investigating and comparing key modern and postmodern interpretations of St. Francis of Assisi from a philosophical-anthropological perspective. We determine these interpretations to be as follows： a man of wonder and lover of wisdom, in other words, a true philosopher; hero of all times; defender of the poverty and poor; “champion of liberty”; peace-maker and pacifist; God＇s troubadour; patron of nature and animals. All of these manifestations of St. Francis＇ personality have been enriched by his Christocentrism and joyful vision. Moreover, this can be traced in primary sources and also echoes in the late modern period. Postmodernity not only incorporated similar motives into the cultural space with new focus and accent, but it also put forward some new visions. St. Francis was postulated as God＇s Fool, not so much in the medieval as in the postmodern sense of foolishness and madness as a way of interaction with the absurd and puzzle-like world in which we live. It also reconciles traditional opposition between joy and laughter as inner feelings and outward emotions within the frame of the postmodern Divine Comedy.

关键词： modemity postmodemity St. Francis of Assisi

Historiography and Scientific Research of Religious Buildings of the Cucuteni-Trypillian Culture

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Journal of Literature and Art Studies 2024年第5期14卷 373-385页

作者： oleksandr Zavalii Department of Religious Studies of H.S.Scovoroda Philosophy Institute of National Academy of Sciences of Ukraine KyivUkraine

The purpose of this article is to reveal the historiography and current state of research related to the cult buildings of the Eneolithic period of the Cucuteni-Trypillian cultural *** article describes the historical path of archaeological discoveries,from the first Trypillian sanctuaries to the discovery of the largest Nebelivka temple complex in Ukraine in *** the same time,the work partially raises the issue of religious beliefs of the ancient farmers of Central Europe in connection with the discovery of their sacred *** special scientific works have not comprehensively addressed this issue and are still fragmentary in nature,it is important at the present stage of research to make some coverage and systematization of existing materials on this issue.

关键词： Trypillia culture Cucuteni-Trypillia culture eneolithic temple prehistoric religion

T-SPLINE开源内核的三层数据结构及算法原理

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计算机辅助设计与图形学学报 2017年第11期29卷 2023-2036页

作者：肖文磊刘亚醉 oleksandr Zavalnyi 赵罡北京航空航天大学机械工程及自动化学院北京100191 北京航空航天大学工信部航空智能制造重点实验室北京100191

针对T-SPLINE开源内核,论述了T样条三层数据结构及相关算法原理,以帮助使用者更快更好地掌握和应用T-SPLINE开源内核的使用方法.首先介绍T-SPLINE开源内核及三层数据结构,论述该数据结构对T样条计算与存储的高效性;然后根据三层数据结... 详细信息

针对T-SPLINE开源内核,论述了T样条三层数据结构及相关算法原理,以帮助使用者更快更好地掌握和应用T-SPLINE开源内核的使用方法.首先介绍T-SPLINE开源内核及三层数据结构,论述该数据结构对T样条计算与存储的高效性;然后根据三层数据结构的特点设计了一系列高效的算法,主要包括面内节点初始化算法、关键参数抽取算法、高效基函数计算算法、重节点管理算法等,并详细说明了上述算法的原理;最后对T-SPLINE开源内核的时间复杂度和空间复杂度进行了分析与验证.实验证明,T-SPLINE开源内核在时间空间复杂度上具有一定的优势.

关键词： T样条开源内核三层数据结构

Tension-free Dirac strings and steered magnetic charges in 3D artificial spin ice

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npj Computational Materials 2021年第1期7卷 1127-1134页

作者： Sabri Koraltan Florian Slanovc Florian Bruckner Cristiano Nisoli Andrii V.Chumak oleksandr V.Dobrovolskiy Claas Abert Dieter Suess Physics of Functional Materials Faculty of PhysicsUniversity of ViennaViennaAustria Theoretical Division Los Alamos National LaboratoryLos AlamosNMUSA Nanomagnetics and Magnonics Faculty of PhysicsUniversity of ViennaViennaAustria Research Platform MMM Mathematics-Magnetism-Materials University of ViennaViennaAustria

3D nano-architectures presents a new paradigm in modern condensed matter physics with numerous applications in photonics,biomedicine,and *** are promising for the realization of 3D magnetic nano-networks for ultra-fast and low-energy data *** in these systems can lead to magnetic charges or magnetic monopoles,which can function as mobile,binary information ***,Dirac strings in 2D artificial spin ices bind magnetic charges,while 3D dipolar counterparts require cryogenic temperatures for their ***,we present a micromagnetic study of a highly frustrated 3D artificial spin ice harboring tension-free Dirac strings with unbound magnetic charges at room *** use micromagnetic simulations to demonstrate that the mobility threshold for magnetic charges is by 2 eV lower than their unbinding *** applying global magnetic fields,we steer magnetic charges in a given direction omitting unintended *** introduced system paves the way toward 3D magnetic networks for data transport and storage.

关键词： stability magnetic artificial

Analysis of the Impact of Thermochemical Recuperation of Waste Heat on the Energy Efficiency of Gas Carriers

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Journal of Marine Science and Application 2020年第1期19卷 72-82页

作者： oleksandr Cherednichenko Vira Mitienkova Mechanical Engineering Institute Admiral Makarov National University of ShipbuildingMykolaiv 54025Ukraine

Enlarging the fleet of gas carriers would make it possible to respond to the growing demand for hydrocarbon gases,but it will increase carbon dioxide *** International Maritime Organization(IMO)has developed the energy efficiency design index(EEDI)with the objective of carbon emission reduction for new *** this paper,thirty gas carriers transporting liquefied natural gas(LNG)and liquefied petroleum gas(LPG)and equipped with various types of main engines are *** shown by the calculation of the attained EEDI,2 of the 13 LPG carriers and 6 of the 17 LNG carriers under study do not comply with the EEDI *** meet the stringent EEDI requirements,applying thermochemical regenerators(TCRs)fed by main engine exhaust gases is *** modeling is applied to analyze the characteristics of the combined gas-turbine-electric and diesel-electric power plant with thermochemical recuperation of the exhaust gas *** TCR on gas carriers with engines fueled by syngas produced from boil-off gas(BOG)reduces the carbon content by 35%and provides the energy efficiency required by IMO without the use of other technologies.

关键词： Liquefied natural gas Liquefied petroleum gas Gas carriers EEDI Thermochemical heat recovery Gas-turbine engine Boil-off gas

Improving the Accuracy of Short-term Forecasting of Electrical Loads Taking into Account Meteorological Factors Based on Support Vectors Method

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Improving the Accuracy of Short-term Forecasting of Electric...

作者：卜科学（Boiko oleksandr）兰州交通大学

学位级别：硕士

目前,国内外研发了许多种负荷预测模型和软件系统。多数模型的预测精度能够满足电力系统调度与用户需求,但在某些情况下,短期负荷预测结果并不总是很理想。因此,结合当地气象条件和自然光照的预测模型迫切需要发展。主要研究内容如下:(1... 详细信息

目前,国内外研发了许多种负荷预测模型和软件系统。多数模型的预测精度能够满足电力系统调度与用户需求,但在某些情况下,短期负荷预测结果并不总是很理想。因此,结合当地气象条件和自然光照的预测模型迫切需要发展。主要研究内容如下:(1)基于支持向量机和粒子群的算法,一个用于地区调度的短期电力系统负荷预测模型被建立。该方法将当地自然光作为影响预测精度的一个重要因素,因此可以提高预测精确度。(2)粒子群算法被用于优化支持向量回归模型的参数,其中空气温度和自然光照考虑作为影响因素。(3)通过对神经模糊网络和支持矢量机的预测结果比较显示,支持向量回归模型有最好的逼近性质,考虑电力系统负荷、空气温度和自然光照因素。课题的理论意义在于开发一种应用粒子群优化算法优化支持向量机的参数的预测模型。该方法建立了电力消费、空气温度和自然光照之间非线性关系以提高模型的预测精度。实际意义在于开发的模型可用来预测区域调度办事处分支机构的能源消费,批发发电公司和领土产生的公司、区域网公司,能源销售公司,以及在分派办事处的个别公司成员的批发或零售电力市场和权力。短期预测的计算机程序也被在MatLab环境下开发应用开发。

关键词：短期负荷预测支持向量粒子群(PSO) 气象因素