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

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

作者： Yoonjung YI zol.argal.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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Understanding the oxidation chemistry of Ti_(3)C_(2)T_(x)(MXene)sheets and their catalytic performances

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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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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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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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蒙古国对华煤炭出口贸易的问题与对策研究

蒙古国对华煤炭出口贸易的问题与对策研究

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作者：萨仁（Sarangerel purevdorj）北京理工大学

学位级别：硕士

煤炭作为蒙古国第一大出口矿产品，其储量位居世界前列，开发潜力巨大。中国作为蒙古国第一贸易伙伴与投资国，同时也是世界上煤炭需求量最高的国家之一。随着中国工业化进程加速对煤等煤资源型产品的需求增加，为蒙古国对华煤炭出口贸... 详细信息

煤炭作为蒙古国第一大出口矿产品，其储量位居世界前列，开发潜力巨大。中国作为蒙古国第一贸易伙伴与投资国，同时也是世界上煤炭需求量最高的国家之一。随着中国工业化进程加速对煤等煤资源型产品的需求增加，为蒙古国对华煤炭出口贸易发展创造了良好的条件。本文首先对文章的研究背景及意义、国内外研究现状进行了介绍，其次阐述了蒙中矿业贸易与煤炭进出口贸易的现状，且进一步对蒙古国对华煤炭出口贸易中存在的问题及原因进行了分析，最终提出了扩大蒙古国对华煤炭出口贸易的对策。

关键词：蒙中贸易煤炭出口资源型产品经贸合作

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瞬间划分多窗口轻松打造虚拟桌面系统

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网络与信息 2010年第1期24卷 60-61页

作者： zol

很多朋友都有过这样的想法，那就是在Windows操作系统中，能不能将系统变为多个独立的虚拟桌面，分别显示不同的内容，执行不同的操作，从而实现分别管理，如在A上上网看资讯、B上处理文档、C上听歌看电影、D上玩游戏，等等。而当前虚... 详细信息

很多朋友都有过这样的想法，那就是在Windows操作系统中，能不能将系统变为多个独立的虚拟桌面，分别显示不同的内容，执行不同的操作，从而实现分别管理，如在A上上网看资讯、B上处理文档、C上听歌看电影、D上玩游戏，等等。而当前虚拟桌面软件，一方面大多资源占用较多，一方面操作较为复杂，设置也相对繁琐，让用户很难快速上手和方便使用，不过，并非我们就无法用到这一功能.

关键词：虚拟桌面桌面系统 Windows操作系统多窗口瞬间桌面软件资源占用松

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Interference Cancellation Algorithm for 2×2 MIMO System without Pilot in LTE

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Communications and Network 2013年第3期5卷 31-35页

作者： Otgonbayar Bataa Erdenebayar Lamjav Uuganbayar purevdorj Young-il Kim Khishigjargal Gonchigsumlaa Electronics and Telecommunications Research Institute (ETRI) 138 Gaejeongno Yuseong-gu Daejeon Korea School of Information and Communication Technology (SICT) of Mongolian University of Science and Technology Ulaaanbaatar Mongolia

Interference cancellation system (ICS) for 3GPP/LTE system is the broadband cancellation system, which receives forward signal through the donor antenna. We proposed new algorithm of received signal with pilot and non-pilot design. Although repeater design needs our project, so in this paper we discuss about interference cancellation algorithm for 2x2 MIMO systems without pilot in LTE. First explain the general principle structure of 3GPP/LTE, next determine our new design and algorithm. Finally, we simulated our mathematic extraction of proposed new algorithm on MATLAB.

关键词： MMSE Lookup-table Threshold Cost Function Viterbi Algorithm

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单反购买，你不可不了解的数据

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现代计算机（中旬刊） 2005年第B7期 56-57页

作者： zol

随着单反数码相机(DSLR)的降价，昔日的专业、发烧友才拥有的数码相机，今日也成了越来越多的普通爱好者的囊中物。对于单反数码相机，咱们在购买前还得作些了解，以便购得自己满意的机器。

关键词：单反数码相机 DSLR 尼康E2 佳能EOS 300D 市场占有率销售渠道

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菜鸟玩装机:教你顺利重装系统

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网络与信息 2009年第11期23卷 46-47页

作者： zol

对于那些大虾级的人物来说,装系统根本不算是件事,就像装软件一样,不停地点＂下一步＂,偶尔需要简单地设置一下罢了!但对于Hz级的朋友来说,装系统简直是件不可能完成的任务,有些人或许根本就没有想过有一天会自己动手装系统。

关键词：重装系统装机鸟软件

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换个地方照样有玩转搜狗在线收藏功能

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网络与信息 2010年第1期24卷 58-59页

作者： zol

在班里和其他人相比，小陈同学还是很穷的，自己老家的情况就不好，上学学费更是靠东拼西凑，所以一直没舍得买自己的电脑，导致别人查资料时。或是拿出手机，或是打开本本，快速联机即可轻松搜索，但他往往还需要跑到东边的网吧或西南... 详细信息

在班里和其他人相比，小陈同学还是很穷的，自己老家的情况就不好，上学学费更是靠东拼西凑，所以一直没舍得买自己的电脑，导致别人查资料时。或是拿出手机，或是打开本本，快速联机即可轻松搜索，但他往往还需要跑到东边的网吧或西南的机房，去临时借机“蹭网”。而每次他找到一些好的浏览网站，比如自己考研必备的资料查询站点等，将其添加到收藏夹中，都往往会由于默认安装的系统还原卡，

关键词：收藏夹在线资料查询还原卡电脑搜索联机

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