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Understanding the oxidation chemistry of Ti_(3)C_(2)T_(x)(MXene)sheets and their catalytic performances

Journal of Energy Chemistry 2024年第1期88卷 437-445,I0010页

作者： Suvdanchimeg Sunderiya Selengesuren Suragtkhuu solongo purevdorj Tumentsereg Ochirkhuyag Munkhjargal Bat-Erdene Purevlkham Myagmarsereejid Ashley DSlattery Abdulaziz SRBati Joseph GShapter Dorj Odkhuu Sarangerel Davaasambuu Munkhbayar Batmunkh Department of Chemistry Division of Natural SciencesSchool of Arts and SciencesNational University of MongoliaUlaanbaatar 14200Mongolia Queensland Micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathan campusBrisbaneQueensland 4111Australia Department of Physics Incheon National UniversityIncheon 22012Republic of Korea Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt LuciaBrisbaneQueensland 4072Australia Adelaide Microscopy The University of AdelaideAdelaideSouth Australia 5005Australia Centre for Organic Photonics&Electronics School of Chemistry and Molecular BiosciencesThe University of QueenslandSt LuciaBrisbaneQueensland 4072Australia

Transition metal carbides and nitrides(MXenes)nanosheets are attractive two-dimensional(2D)materials,but they suffer from oxidation/degradation issues during storage and/or applications due to their sensitivity to water and *** the great research progress,the exact oxidation kinetics of Ti_(3)C_(2)T_(x)(MXene)and their final products after oxidation are not fully ***,we systematically tracked the oxidation process of few-layer Ti_(3)C_(2)T_(x) nanosheets in an aqueous solution at room temperature over several *** also studied the oxidation effects on the electrocatalytic properties of Ti_(3)C_(2)T_(x) for hydrogen evolution reaction and found that the overpotential to achieve a current density of 10 mA cm^(-2)increases from 0.435 to 0.877 V after three weeks of degradation,followed by improvement to stabilized values of around 0.40 V after eight *** results suggest that severely oxidized MXene could be a promising candidate for designing efficient *** to our detailed experimental characterization and theoretical calculations,unlike previous studies,black titanium oxide is formed as the final product in addition to white Ti(IV)oxide and disordered carbons after the complete oxidation of Ti_(3)C_(2)T_(x).This work presents significant advancements in better understanding of 2D Ti_(3)C_(2)T_(x)(MXene)oxidation and enhances the prospects of this material for various applications.

关键词： 2D materials MXene Chemical degradation Catalysis Hydrogen evolution reaction

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When Fleeing Matters:Differences in Escape Behaviours of Three Northeast Asian Anurans

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Asian Herpetological Research 2024年第1期15卷 41-48页

作者： Yoonjung YI Zoljargal purevdorj Irina MASLOVA Yikweon JANG Amaël BORZÉE Laboratory of Animal Behaviour and Conservation College of Life SciencesNanjing Forestry UniversityNanjing 210037JiangsuChina Division of EcoScience and Department of Life Sciences Ewha Womans UniversitySeoul 03760Republic of Korea Department of Biology School of MathematicsMongolian State University of EducationUlaanbaatar 210648Mongolia Department of Forest and Environmental Resources Chungnam National UniversityDaejeon 34134Republic of Korea Federal Scientific Center of the East Asia Terrestrial Biodiversity Far Eastern Branch of Russian Academy of SciencesVladivostok 690022Russia

Prey species may have their own optimal escape strategy to balance predation risks and the energetic cost of *** species have an advantage when maintaining a short fleeing distance,while others may favour an earlier escape based on microhabitat,size,or body ***,we examined the escape behaviour of the three syntopic Northeast Asian anuran species:Mongolian toads(Strauchbufo raddei),Amur brown frogs(Rana amurensis),and Japanese treefrogs(Dryophytes japonicus)in Mongolia,Russia,China and DPR *** examined flight initiation distance(FID;the distance from a potential predator to the point when the individual starts to flee)and distance fled(DF;distance between flight initiation and flight termination points)of each species and the effects of microhabitat,sex,and body *** raddei and *** had a longer FID than ***,and *** also had a longer DF than *** trends remained similar when dividing FID and DF by a size proxy(snout-vent length)for all *** suggests that the treefrog *** used a strategy to stay immobile even when they were detected,and the toad *** reacted quicker and more sensitively to predators despite the presence of *** *** had a significantly longer FID than males suggesting that females are more sensitive to predation risk in this species,but body size was not significant for any of the three *** results indicate that the three sympatric species have different escaping strategies,likely related to differences in physiology and crypticity.

关键词： amphibian distance fled escape behaviour flight initiation distance predation

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Study of Iron Ore Processing Technology of Tamir Gol Deposit in Mongolia

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Journal of Minerals and Materials Characterization and Engineering 2024年第3期12卷 165-188页

作者： Mаngal Delgermaa Lkhagva Byambadorj Ayurzana purevdorj Department of Metallurgy and Production Engineering School of Mechanical Engineering and Transportation MUST Ulaanbaatar Mongolia Beren Metal Co. Ltd. Beren Grup Ulaanbaatar Mongolia Foundry Workshop Repair Mechanic Plant Erdenet Factory Erdenet Mongolia

Iron ore processing for steel production is crucial to the development and economy of Mongolia. Regardless of having abundant natural resources and raw materials, Mongolia almost doesn’t produce final products. So far, most mining and mineral beneficiation plants export raw materials only subjected to beneficiation process. Out of more than 200 deposits in Mongolia, 91 deposits had been explored with different methods and stages, and estimated the resource of 33 reserves. Without processing the iron ore, it is impossible to use it for steelmaking due to its high sulfur and phosphorus impurities. Therefore, to study the processing of iron ore deposits in Mongolia, we did a preliminary investigation of iron ore deposits and took samples from the Tamir Gol deposit with high silica and phosphorus content that is difficult to process. Then, conducted mineral analysis and determined the grain structure and beneficiation characteristics of Tamir Gol iron deposit. .

关键词： Resource Ore Structure Reserve Analysis Composition

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《卫拉特法典》诉讼法律制度特征

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中国蒙古学（蒙文） 2024年第1期 169-175页

作者：苏楞不详

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Research on the Development Strategy of iTools of Mongolia

Research on the Development Strategy of iTools of Mongolia

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作者： Yandagpalam solongo 天津工业大学

学位级别：硕士

Itools是蒙古国最大的数据中心企业,目前正处于发展转型的关键时期。本文旨在为itools公司提出一个有效的发展战略。本文通过SWOT分析和PEST分析,深入探讨了itools的发展环境和内外部条件,分析了其发展历史,明确了其发展前景。本文认为... 详细信息

Itools是蒙古国最大的数据中心企业,目前正处于发展转型的关键时期。本文旨在为itools公司提出一个有效的发展战略。本文通过SWOT分析和PEST分析,深入探讨了itools的发展环境和内外部条件,分析了其发展历史,明确了其发展前景。本文认为,尽管itools在蒙古具有强大的竞争实力和良好的宏观环境,但信息技术产业发展迅速,具有强大的潜在竞争对手。因此,公司应居安思危,认清面临的挑战,积极采取先进的技术战略,招聘优秀的软硬件技术人才,充分利用国家发展政策支持,实现利用先发优势赢得竞争对手的战略目标。

关键词：竞争优势开发 Itools Pest Swot 数据中心数据中心层战略

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Effects of grazing and precipitation variability on vegetation dynamics in a Mongolian dry steppe

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Journal of Plant Ecology 2016年第5期9卷 508-519页

作者： Tserenpurev Bat-Oyun Masato Shinoda Yunxiang Cheng Yadamjav purevdorj Arid Land Research Center Tottori UniversityHamasakaTottori 680-0001Japan Information and Research Institute of Meteorology Hydrology and EnvironmentUlaanbaatar 15160Mongolia Graduate School of Environmental Studies Nagoya UniversityFuro-choChikusa-kuNagoya 464-8601Japan College of Pastoral Agriculture Science and Technology Lanzhou UniversityLanzhou 730020China Department of Food Science and Human Wellness Rakuno Gakuen UniversityEbetsuHokkaido 069-8501Japan

Aims Grazing and water availability are the primary drivers of vegetation dynamics in grazing-dominated regions of Mongolia with a semi-arid climate and frequent *** animal husbandry still plays a large part in the economy of Mongolia,but more variable precipitation regime and increase in livestock number have severely affected grassland ecosystems through overgrazing,leading to pasture *** study aimed to examine the effects of grazing exclusion,interannual variation of plant-available precipitation(PAP)and their interaction on the aboveground biomass(AGB)of each dominant species,the AGB of annual species and the total AGB in a Mongolian dry steppe,using long-term field *** To detect the effect of grazing on vegetation dynamics,vegetation surveys were conducted in a non-grazed exclosure zone and a fully grazed area outside the *** assessed the effects of grazing,PAP and their interaction on AGB parameters using a generalized linear model.A detrended correspondence analysis(DCA)was used to visualize the effects of grazing and PAP on the AGB of each *** Findings Grazing,PAP and their interaction had significant effects on *** effect of grazing on AGB was larger with higher precipitation and higher amounts of AGB(***)while AGB was strongly limited in drought years,which resulted in a smaller grazing *** current year PAP had the highest impact(r=0.88,P<0.01)on *** dominance of annual species was characterized by the amount of PAP in the current and preceding years:annuals dominated in wet years that followed consecutive dry *** DCA Axis 1 reflected the variation of AGB with interannual variation of PAP while the DCA Axis 2 differentiated the grazing *** DCA scatter diagram based on species score illustrated that Artemisia adamsii(an unpalatable herb)was clearly linked to grazing disturbance whereas palatable perennials such as Agropyron cristatum,Stipa krylovii and Cleistogenes

关键词： aboveground biomass annual species drought grazing plant-available precipitation

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Creative Talents' Spatial Agglomeration Effects: an Empirical Analysis from Shanghai

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Journal of Donghua University(English Edition) 2018年第1期35卷 86-93页

作者： YUAN Xinmin solongo Tsogtgere[l] Glorious Sun School of Business and Management Donghua University Shanghai 200051 China

Creative talents play a very important role in the vitality of a city. It is obvious that highly developed creative cities tend to have higher concentration of creative talents geographically. The article analyzed its effects on six aspects: information sharing,collective learning, talents' learning & growing, knowledge spillover,innovation and scale in Shanghai for last 10 years by using the entropy method based on the established effect index system with15 indices. It attempted to understand not only achievements and challenges,but also internal relations between the effects of creative talents' agglomeration in Shanghai. The article would be a contribution for enhancing the agglomeration of creative talents in cities,promoting the development of creative industry and enhancing urban vitality and innovation in China.

关键词： creative talent spatial agglomeration effects Shanghai

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Study of Iron Ore Processing Technology of Tamir Gol Deposit in Mongolia

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Journal of Minerals and Materials Characterization and Engineering（矿物质和材料特性和工程） 2024年第3期 165页

作者： Mаngal Delgermaa Lkhagva Byambadorj Ayurzana purevdorj

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Consumer’s Online Purchasing Decision and Its Influencing Factors in Mongolia

Consumer’s Online Purchasing Decision and Its Influencing F...

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作者：班雅（solongo Bayarmaa）大连海事大学

学位级别：硕士

这项研究的目的是要理解蒙古国消费者对网上购物有什么观点,网上购物的意见及态度,探究影响消费者网上购物的因素。通过这项研究我们要总结网上购物上所在的各各问题及其用户所面临的风险。在研究的范围,我进行了问卷调查统计。一份问... 详细信息

这项研究的目的是要理解蒙古国消费者对网上购物有什么观点,网上购物的意见及态度,探究影响消费者网上购物的因素。通过这项研究我们要总结网上购物上所在的各各问题及其用户所面临的风险。在研究的范围,我进行了问卷调查统计。一份问卷共有19题包括人口信息,互联网使用情况,影响网上购物的因素以及消费者所受的风险。利用在线方法和纸质形式分发以后共有251个用户参加了我们的问卷调查。本研究上应用了统计学方法,假设方法和回归分析方法。使用SPSS 25.0统计方法进行了分析。该研究的目标是要检验人口差异会如何影响网上购物的表现。根据调查结果,影响消费者购买的主要因素是付款安全和交货所在的风险。而且产品价格和网站设计对消费者的购买无有重大影响。消费者则表示,网上购物所在的主要问题是商品的质量以及昂贵的交货服务。总之,最近三年拥护者的互联网使用和网上购物倾向于与日俱增。为了将来增多消费者的网上购买量,必要解决影响网上的因素。为了降低在线商务用户承受的风险,需要解决以下问题,建立安全的付款系统,改善地址和交付服务,提高客户信息隐私与安全。通过解决和改善这些问题,我们相信在线商务可以在蒙古得到充分发展。

关键词：电子商务物流消费者行为因素蒙古

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蒙古国初中生母语课程学习动力研究

蒙古国初中生母语课程学习动力研究

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作者： GANBOLD solongo 湖南大学

学位级别：硕士

母语教育是学生学好其他课程的先决条件,也是学生成长发展的基础。一个民族必须确立母语教育在教育中的首要地位,否则,不仅会失去本民族的文化土壤和精神家园,而且会丧失自身生存发展的根本。但是,与母语教育的重要地位极不相称的是,轻... 详细信息

母语教育是学生学好其他课程的先决条件,也是学生成长发展的基础。一个民族必须确立母语教育在教育中的首要地位,否则,不仅会失去本民族的文化土壤和精神家园,而且会丧失自身生存发展的根本。但是,与母语教育的重要地位极不相称的是,轻视母语教育正在成为一种普遍的社会现象,母语教育的地位甚至已经退居外语教育之后,从幼儿园到中小学直至大学,蒙古学生都过多地将精力集中在学习数学和外语上。学生母语课程学习动力的高低直接关系到母语教育的成败。而初中阶段是孩子自我认知发展的关键期,也是学生母语课程学习动力形成和发展的重要阶段。为了研究初中生母语课程学习动力的现状和影响因素,在文献研究的基础上,从学生自身因素、教师及学校因素、家庭及社会因素等三个维度设计了调查问卷,并抽取蒙古国两所学校的部分初中学生进行问卷调查,对回收的9 1 3份有效问卷进行了统计分析。以调查统计数据为基础,从情感和认知两个层面对蒙古国初中生的母语课程学习动力进行了分析。研究发现,从初一到初四,学生们对于蒙语课程的喜欢程度、对于学习内容的兴趣、对于教师教学方式的满意度,对于课外阅读的兴趣等几个与学习动力直接相关的重要方面,均呈现逐年下降的趋势,这一严峻现实为深化初中母语课程教学改革敲响了警钟。在对调查问卷进行主成分因子分析的基础上,提取出影响初中生母语课程学习动力的6大主要因素,按照影响程度大小,这6大因素依次为:学生对母语课程的情感态度,学生对母语课程的理性认识,学生学习母语课程的社会支持,学生的课外阅读,母语课程的学习基础和习惯,以及母语课程的学习目的。结合这6个影响因素,文章讨论了提高初中生母语课程学习动力的可能途径和措施,为初中阶段的母语课程教学改革提供参考和依据。

关键词：母语课程初中生学习动,蒙古国

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