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Dynamic response and plastic deformation behavior of Ti–5Al–2.5Sn ELI and Ti–8Al–1Mo–1V alloys under high-strain rate

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Rare Metals 2014年第2期33卷 127-133页

作者： Yan-Ling Wang Song-Xiao Hui Rui Liu Wen-Jun Ye Yang Yu ravil kayumov State Key Laboratory for Fabrication & Processing of Nonferrous Metals General Research Institute for Nonferrous Metals Department of Mechanical Engineering Sun Moon University

Split Hopkinson pressure bar test system was used to investigate the plastic deformation behavior and dynamic response character of a-type Ti–5Al–2.5Sn ELI and near a-type Ti–8Al–1Mo–1V titanium alloy when subjected to dynamic loading. In the present work, stress–strain curves at strain rate from 1.5 9 103to 5.0 9 103s-1were analyzed, and optical microscope（OM） was used to reveal adiabatic shearing behavior of recovered samples. Results show that both the two alloys manifest significant strain hardening effects. Critical damage strain rate of the two alloys is about 4.3 9 103s-1, under which the impact absorbs energy of Ti–5Al–2.5Sn ELI and Ti–8Al–1Mo–1V are 560 and 470 MJ m-3, respectively. Both of them fracture along the maximum shearing strength orientation, an angle of 45° to the compression axis. No adiabatic shear band（ASB） is found in Ti–5Al–2.5Sn ELI alloy, whereas several ASBs with different widths exist without regular direction in Ti–8Al–1Mo–1V alloy.

关键词： Titanium alloy Ti–5Al–2.5Sn ELI Ti–8Al– 1Mo–1V High-strain rate Adiabatic shear band

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Modelling and reviewing the reliability and multi-objective optimization of wind-turbine system and photovoltaic panel with intelligent algorithms

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Clean Energy 2021年第4期5卷 713-730页

作者： Reza Alayi Mehdi Jahangiri John William Grimaldo Guerrero ravil Akhmadeev Rustem Adamovich Shichiyakh Sara Abbasi Zanghaneh Department of Mechanics Germi BranchIslamic Azad UniversityGermiIran Department of Mechanical Engineering Shahrekord BranchIslamic Azad UniversityShahrekordIran Departamento de Energía Universidad de la CostaBarranquillaColombia Plekhanov Russian University of Economics Stremyanny lane36Moscow117997Russian Federation Department of Management Candidate of Economic SciencesKuban State Agrarian University named after I.T.TrubilinKrasnodarRussian Federation Department of Energy Engineering Energy Institute of Higher EducationSavehIran

One of the options for non-dependence on fossil fuels is the use of renewable energy,which has not grown significantly due to the variable nature of this type of *** combined use of wind and solar energy as energy sources can be a good solution to the problem of variable energy ***,the purpose of this research is to model a combination of the wind-turbine system and photovoltaic cell,which is needed to investigate their ability to supply electrical *** determine this important power production,real data of solar-radiation intensity and wind are used and,in modelling photovoltaic cells,the effects of ambient temperature are also *** order to generalize the studied system in all dimensions,different scenarios have been *** to the amount of electrical power generated,during the evaluation of these scenarios,two economic parameters,namely the selected scenario of a wind/solar system with diesel-generator support,was determined.

关键词： reliability wind turbine photovoltaic cell intelligent algorithm economic analysis

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Molecular and cellular changes in the post-traumatic spinal cord remodeling after autoinfusion of a genetically-enriched leucoconcentrate in a mini-pig model

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Neural Regeneration Research 2023年第7期18卷 1505-1511页

作者： Maria Aleksandrovna Davleeva ravil Rasimovich Garifulin Farid Vagizovich Bashirov Andrei Aleksandrovich Izmailov Leniz Faritovich Nurullin Ilnur Ildusovich Salafutdinov Dilara Zilbarovna Gatina Dmitrij Nikolaevich Shcherbinin Andrei Aleksandrovich Lysenko Irina Leonidovna Tutykhina Maksim Mikhailovich Shmarov Rustem Robertovich Islamov Department of Histology Cytology and EmbryologyKazan State Medical UniversityKazanRussia Кazan Institute of Biochemistry and Biophysics Federal Research Center of Kazan Scientific Center of Russian Academy of SciencesKazanRussia Institute of Fundamental Medicine and Biology Kazan Federal UniversityKazanRussia The National Research Center for Epidemiology and Microbiology named after Honorary Academician N.F.Gamaleya of the Ministry of Health of the Russian Federation MoscowRussia

Post-traumatic spinal cord remodeling includes both degenerating and regenerating processes,which affect the potency of the functional recovery after spinal cord injury(SCI).Gene therapy for spinal cord injury is proposed as a promising therapeutic strategy to induce positive changes in remodeling of the affected neural *** our previous studies for delivering the therapeutic genes at the site of spinal cord injury,we developed a new approach using an autologous leucoconcentrate transduced ex vivo with chimeric adenoviruses(Ad5/35)carrying recombinant *** the present study,the efficacy of the intravenous infusion of an autologous genetically-enriched leucoconcentrate simultaneously producing recombinant vascular endothelial growth factor(VEGF),glial cell line-derived neurotrophic factor(GDNF),and neural cell adhesion molecule(NCAM)was evaluated with regard to the molecular and cellular changes in remodeling of the spinal cord tissue at the site of damage in a model of mini-pigs with moderate spinal cord *** animals were randomly divided into two groups of 4 pigs each:the therapeutic(infused with the leucoconcentrate simultaneously transduced with a combination of the three chimeric adenoviral vectors Ad5/35‐VEGF165,Ad5/35‐GDNF,and Ad5/35‐NCAM1)and control groups(infused with intact leucoconcentrate).The morphometric and immunofluorescence analysis of the spinal cord regeneration in the rostral and caudal segments according to the epicenter of the injury in the treated animals compared to the control mini-pigs showed:(1)higher sparing of the grey matter and increased survivability of the spinal cord cells(lower number of Caspase-3-positive cells and decreased expression of Hsp27);(2)recovery of synaptophysin expression;(3)prevention of astrogliosis(lower area of glial fibrillary acidic protein-positive astrocytes and ionized calcium binding adaptor molecule 1-positive microglial cells);(4)higher growth rates of regeneratingβIII-tubulin-positi

关键词： autologous genetically-enriched leucoconcentrate chimeric adenoviral vector gene therapy glial cell line-derived neurotrophic factor mini-pig neural cell adhesion molecule spinal cord contusion injury vascular endothelial growth factor

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吉尔吉斯斯坦湖泊型旅游资源开发研究——以伊塞克湖为例

吉尔吉斯斯坦湖泊型旅游资源开发研究——以伊塞克湖为例

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作者：拉维尔(MASHANLO ravil) 长安大学

学位级别：硕士

吉尔吉斯斯坦具有重要的旅游潜力,具有发展国内和国际旅游业的巨大潜力。吉尔吉斯斯坦境内有超过5000个历史古迹,2000多个湖泊,天山山脉以及最大的伊塞克湖,是最具代表性的山脉与湖泊。本文通过对现阶段吉尔吉斯斯坦旅游业发展现状的研... 详细信息

吉尔吉斯斯坦具有重要的旅游潜力,具有发展国内和国际旅游业的巨大潜力。吉尔吉斯斯坦境内有超过5000个历史古迹,2000多个湖泊,天山山脉以及最大的伊塞克湖,是最具代表性的山脉与湖泊。本文通过对现阶段吉尔吉斯斯坦旅游业发展现状的研究,分析影响吉尔吉斯斯坦旅游业发展的主要因素,对吉尔吉斯斯坦湖泊型旅游开发进行了SWOT分析,探究现阶段吉尔吉斯斯坦旅游业发展过程中所面临的问题,并以伊塞克湖度假区为案例进行分析,提出相应的建议与解决措施,继而提出对吉尔吉斯斯坦湖泊型旅游资源的发展构想。本文在第二章阐述了旅游资源的相关概念及理论基础;第三章概述了吉尔吉斯斯坦湖泊型旅游资源赋存与发展情况,吉尔吉斯斯坦国内优先发展能源、采矿及旅游业,因为政策的原因,旅游业在吉尔吉斯斯坦发展前景广阔,针对国家特点及全球旅游市场需求,主要发展两类:山地探险旅游、度假休闲旅游。第四章笔者对吉尔吉斯斯坦湖泊型旅游开发进行了SWOT分析。第五章分析了本文的案例——伊塞克湖度假区的基本概况,旅游资源,旅游发展概况,发展问题等。问题主要是市场定位不准、度假主题不明显、旅游基础设施滞后、旅游服务有待提高、季节性影响严重等。第六章笔者以湖泊型旅游资源开放原则(可持续发展原则、市场导向原则、突出特色原则)为脉络,构想了吉尔吉斯斯坦湖泊型旅游的发展前景,提出吉尔吉斯斯坦湖泊旅游的发展对策:政府主导,加强基础设施建设;加大招商力度,推进项目建设;加大旅游宣传,打造国际旅游品牌;加强服务设施建设,培养旅游人才;合理规划旅游资源,带动周边城镇发展;改进产品结构,提高竞争力;塑造深厚的人文氛围,开展特色风情游;平衡旅游淡旺季逆差。论文的研究成果对于吉尔吉斯斯坦湖泊型旅游资源的开发以及旅游业的发展具有积极的借鉴意义。

关键词：吉尔吉斯斯坦湖泊型旅游资源资源开发 SWOT

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一种优越的冲模制造方法

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模具工业 1993年第9期19卷 59-59,58页

作者： Dmitry Kotelnikov ravil Abubekerov 杜忠友

简要论述了通过辉光放电对硬质合金冲模进行气相扩散连接的方法,其应用效果是引人注目的。

关键词：冲模制造硬质合金热处理

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