检索结果-南通市图书馆

Zavkhan River and Its Catchment Area Delineation Using Satellite Image

Journal of Water Resource and Protection 2013年第10期5卷 919-929页

作者： Ochir Altansukh Munkhjargal Munkhdavaa bat-erdene ariunsanaa Tsetsgee Solongo The Professor’s Team of Environmental Science School of Earth Sciences National University of Mongolia Ulaanbaatar Mongolia

The purpose of this research is to define initial parameters of Khyargas Lake-Zavkhan River and its catchment area using satellite images. The study has been done by two datasets: 1) Shuttle Radar Topography Mission (SRTM) at a horizontal spatial resolution of 90 meters, 2) The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) at a horizontal spatial resolution of 30 meters, using two different models of ArcHydro and Integrated Land and Water Information System (ILWIS) softwares. Main methods of models, that were used in this research are the Deterministic-8, the steepest slope, the spread, the seek computations and the trace analysis. Moreover, input data of the modeling are digital elevation model (DEM) and lake position, outlet location of the river. DEM based ArcHydro model was run on the both datasets, and ILWIS model was run on SRTM data. Several intermediate results were produced while the models run, and initial parameters of the Zavkhan River, its catchment area have been defined at the end of the model. Moreover, final results of the models were compared with each other and with the result of previous research, and with the reality. The result of this study can be used in baseline and advanced research on the catchment area. Besides of that, the result can define a spatial boundary of study on Zavkhan River and its catchment area. Moreover, it would have support for decision-making on ground and surface water resource, distribution and management. Further research, which will cover the entire territory of Mongolia, has to be done using same methodology. The 332nd decision on “River catchment areas of Mongolia” of the Minister of Nature, Environment and Tourism in 2009 has to renew, if a result of that study would be accepted from vocational organization and experts.

关键词： Khyargas Lake-Zavkhan River Catchment Area Initial Parameters of the River Satellite Image Mod-eling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rare-earth Magnet Free Flux-switching Generator for Wind Turbines in Micro-grids:A Review

引用

CES Transactions on Electrical Machines and Systems 2024年第3期8卷 295-309页

作者： Tugberk Ozmen batıEren Ergun Mehmet Onur Gulbahce Nevzat Onat Vocational School of Manisa Technical Sciences Manisa 45140Turkey department of Electrical Engineering Istanbul Technical UniversityIstanbul 34469Turkey Department of Electrical and Electronics Engineering University of Manisa Celal Bayar UniversityManisa 45140Turkey

In traditional electricity generation plants,large powerful synchronous,induction,and direct current generators were *** the proliferation of microgrids focused on electricity generation from renewable energy sources in today’s power grids,studies have been conducted on different types of *** of the traditional generator architecture,generators with brushless structures,particularly those utilizing magnets for excitation,have found broad *** generators(FSGs)are innovative types owing to their robust structure,active stator design,and high power density ***,designs have typically relied on rare-earth element ***-earth magnets possess negative characteristics such as price uncertainty,the potential risk of scarcity in the future,and limited geographical production,leading to research on FSGs that do not depend on rare-earth *** study comprehensively examines FSGs that do not use rare-earth element *** study delves into the usage areas,operational mechanisms,structural diversities,and counterparts in the literature of these generators.

关键词： Flux-switching Generator Micro-grid Wind energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quadruple[6]Helicene Featuring Pyrene Core:Unraveling Contorted Aromatic Core with Larger Effective Conjugation

引用

Precision Chemistry 2024年第9期2卷 488-494页

作者： Christopher Wallerius Otgonbayar erdene-Ochir Eva Van Doeselar Ronald Alle Anh Tu Nguyen Marvin F.Schumacher Arne Lützen Klaus Meerholz Sai Ho Pun Department of Chemistry University of CologneCologne 50939Germany Kekulé-Institute of Organic Chemistry and Biochemistry University of BonnBonn 53121Germany Department of Chemistry Hong Kong University of Science and TechnologyClean Water BayHong KongChina

Multiple helicenes display distinct aromatic cores characterized by highly twisted rings that are shared or fused with constituent helicene *** these aromatic cores unlocks avenues for creating multiple helicenes with distinct properties and *** we report the synthesis of a quadruple[6]helicene featuring pyrene as the aromatic *** synthesis involved key steps of the annulativeπ-extension reaction and Scholl *** extending multiple helicenes along the axial direction,the degree of contortion of the aromatic core can be controlled from nearly flat to highly ***,quadruple[6]-helicene exhibits a significant red-shift of 0.49 eV compared to quadruple[4]-helicenes,of which the red-shift arises from bothπ-extension and augmented effective conjugation due to enhanced *** chemical calculations demonstrate that the degree of contortion in the pyrene core adeptly governs the energy levels of the HOMO and LUMO,which offers an alternative strategy beyond mere enlargement of theπ*** intriguing serendipitous finding reveals the formation of one-molecule-thick supramolecular homochiral nanosheets through selfinterlocking interactions of enantiomers in single crystals,a rare packing motif for multiple helicenes.

关键词： Helicenes Polycyclic aromatics Pyrene Core contortion Effective conjugation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于博弈论的蒙古国经济社会-生态环境耦合协调度驱动因素及其特征研究

引用

北京师范大学学报（自然科学版） 2024年第4期60卷 499-508页

作者：黄纤玉郝新陈静欧阳威 ANARMAA Sharkhuu SOYOL-erdene Tseren-Ochir 北京师范大学环境学院北京北京师范大学环境与生态交叉前沿研究院广东珠海蒙古国立大学生物学院乌兰巴托蒙古国

蒙古国生态环境持续恶化及中蒙边境生态屏障薄弱是2国面临的共同发展问题,但目前全国尺度下综合性、多要素的经济社会与生态环境耦合协调发展类型、特征及驱动因素等尚缺乏定量评估,影响了中蒙双方共建“一带一路”绿色发展格局的统筹推... 详细信息

蒙古国生态环境持续恶化及中蒙边境生态屏障薄弱是2国面临的共同发展问题,但目前全国尺度下综合性、多要素的经济社会与生态环境耦合协调发展类型、特征及驱动因素等尚缺乏定量评估,影响了中蒙双方共建“一带一路”绿色发展格局的统筹推进.本文总结了蒙古国经济社会及生态环境发展现状,采用AHP-CRITIC-博弈论法计算指标要素主客观组合权重,综合评价了蒙古国经济社会-生态环境发展的耦合协调度.结果表明,2005−2021年蒙古国经济社会-生态环境耦合协调度呈现波动上升趋势,耦合协调度类型始终属于严重失调类型,生态环境发展滞后是目前发展阶段的特征.社会发展水平和生态环境禀赋是经济社会子系统和生态环境子系统的主要驱动因素.皮尔逊相关性分析表明,水域面积和森林资源减少、水质恶化以及沙尘天气等灾害/事故响应增加与经济社会稳步发展的不匹配可能是导致该特征形成且耦合协调度始终较低的原因.为推动双边绿色发展战略深化对接,中蒙2国应在促进经济社会发展交流的同时,深化加强生态环境保护修复力度以恢复生态环境禀赋的交流合作.

关键词：环境与发展耦合协调度模型博弈论蒙古国 “一带一路”绿色发展

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

新疆卫拉特蒙古民间长调歌中的汉语借词初探

引用

西部蒙古论坛 2024年第1期 77-84,M0005页

作者：策·巴图新疆大学历史学院新疆乌鲁木齐830046

新疆卫拉特蒙古古老的长调歌中频繁出现一些汉语借词,笔者在搜集整理并辨别这些借词的基础上,在对其进行内容分类,进而从语音学、形态学、语义学角度进行分析,探讨其特点,目的在于对蒙古语汉语借词研究提供参考,对新疆卫拉特蒙古历来就... 详细信息

新疆卫拉特蒙古古老的长调歌中频繁出现一些汉语借词,笔者在搜集整理并辨别这些借词的基础上,在对其进行内容分类,进而从语音学、形态学、语义学角度进行分析,探讨其特点,目的在于对蒙古语汉语借词研究提供参考,对新疆卫拉特蒙古历来就学习和使用汉语的事实提供依据。

关键词：卫拉特民间长调歌汉语借词研究

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于人机协同优化研究的工业人机界面设计

引用

起重运输机械 2024年第16期 88-92页

作者：赵剑威哈斯额尔敦北京起重运输机械设计研究院有限公司北京100007

随着工业自动化技术的迅速发展,人机界面作为人与机器交互的重要媒介,其设计优化对提高生产效率和保障操作安全具有重要意义。文中针对现代工业环境中人机协同的复杂性及用户需求的多样性,提出了一种基于人机协同优化的工业人机界面设... 详细信息

随着工业自动化技术的迅速发展,人机界面作为人与机器交互的重要媒介,其设计优化对提高生产效率和保障操作安全具有重要意义。文中针对现代工业环境中人机协同的复杂性及用户需求的多样性,提出了一种基于人机协同优化的工业人机界面设计方法。通过综合用户需求、界面设计和技术实现等多方面因素分析,旨在设计出既符合人性化设计原则,又满足实际工业应用需求的人机界面系统,以期提供有关工业人机界面系统设计的参考。

关键词：工业人机界面协同优化界面设计

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance Analysis of Optimized Content Extraction for Cyrillic Mongolian Learning Text Materials in the Database

引用

Journal of Computer and Communications 2016年第10期4卷 79-89页

作者： bat-erdene Nyandag Ru Li G. Indruska School of Computer Sciences Inner Mongolia University China IT Consultant Destination Consulting Co. Hattisaar Hub Putalisadak Kathmandu Nepal

This paper had developed and tested optimized content extraction algorithm using NLP method, TFIDF method for word of weight, VSM for information search, cosine method for similar quality calculation from learning document at the distance learning system database. This test covered following things: 1) to parse word structure at the distance learning system database documents and Cyrillic Mongolian language documents at the section, to form new documents by algorithm for identifying word stem;2) to test optimized content extraction from text material based on e-test results (key word, correct answer, base form with affix and new form formed by word stem without affix) at distance learning system, also to search key word by automatically selecting using word extraction algorithm;3) to test Boolean and probabilistic retrieval method through extended vector space retrieval method. This chapter covers: to process document content extraction retrieval algorithm, to propose recommendations query through word stem, not depending on word position based on Cyrillic Mongolian language documents distinction.

关键词： Cyrillic Mongolian Language Content Extraction Formatting Learning Text Materials Style

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

“一带一路”背景下中国对蒙古国直接投资效应研究

“一带一路”背景下中国对蒙古国直接投资效应研究

引用

作者： bat-erdene TUVSHINTUYA（图雅）大理大学

学位级别：硕士

2014年,中蒙双方签署了《中蒙全面战略伙伴关系》协议,标志着两国关系进入了一个新的发展阶段。未来,随着“一带一路”倡议的推进以及中蒙经济走廊的建设,中蒙经贸合作将迎来更广阔的发展空间。中蒙经济走廊是“一带一路”倡议的重要组... 详细信息

2014年,中蒙双方签署了《中蒙全面战略伙伴关系》协议,标志着两国关系进入了一个新的发展阶段。未来,随着“一带一路”倡议的推进以及中蒙经济走廊的建设,中蒙经贸合作将迎来更广阔的发展空间。中蒙经济走廊是“一带一路”倡议的重要组成部分,该走廊从中国内蒙古自治区的二连浩特市开始,贯穿蒙古国,最终通往俄罗斯。这一走廊的建设将为中蒙两国的经贸合作注入新的动力。同时,中国与蒙古国还可以加强在人文领域的交流,推进两国之间的友好关系。中蒙两国的经贸合作关系已经进入了一个新的发展阶段。未来,两国可以继续加强合作,推进“一带一路”倡议和中蒙经济走廊的建设,并在贸易、投资、基础设施建设、人文交流等领域深入合作,推动两国经济繁荣和友好合作关系的不断深入发展。但与此同时,虽然中国在蒙古的投资企业数量和投资金额相比于其他国家都是最多的,但仍然未形成较大的规模和整体效益。中国在蒙古国投资的主要企业仍然以中小型项目和私人企业为主,缺乏较强的竞争力。本文在研究过程中分析了中国对蒙古投资的发展现状,包括了蒙古吸引中国投资的规模状况、蒙古吸引中国投资的行业分布以及中蒙贸易现状,还有目前中国投资者对蒙古投资的相关案例,从一些成功案例和失败案例吸取了相关经验。其次,分析了中国对蒙古投资的影响因素,包括了中国对蒙古投资的积极影响因素和负面因素,并对蒙古的投资环境进行了分析。最后在上述分析的基础上提出了促进中国对蒙古投资的对策和建议,包括了改善外资投资环境、加强基础设施建设、抓住“一带一路”倡议机遇以及引导企业履行社会义务等四个方面。研究中国对蒙古国投资效应的意义在于探究两国在经济、政治、文化等方面的联系和互动,深入了解蒙古国的发展现状和趋势,为两国的合作提供参考和支持。同时,这样的研究也可以促进中蒙经济贸易的发展,推动两国间的合作与交流。

关键词：一带一路中国蒙古投资

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Research into Antibacterial Effects of Polysaccharide-Based Microparticles

引用

Advances in Microbiology 2023年第8期13卷 386-398页

作者： Enkhtaivan erdene Odonchimeg Munkhjargal Nyamkhuu Lkhagva Enkhjargal Dorjbal Baatarkhuu Oidov ariunsanaa Byambaa Mongolian National University of Medical Sciences Ulaanbaatar Mongolia Department of Biomedicine Etugen University Ulaanbaatar Mongolia Institute of Chemistry and Chemical Technology Mongolian Academy of Science Ulaanbaatar Mongolia

Background: Due to worldwide increases in the prevalence of antibiotic-resistant bacteria, it is necessary to develop an active drug delivery system that can enable therapeutics to reach their molecular targets. Maintaining the concentration of any drug in the blood at a certain level for a long time is critical in the practice of drug therapy. With the increased frequency of drug use, the blood concentration of drugs exceeds the therapeutic level, leading to toxicity or ineffectiveness. To solve these problems, in recent years, much attention has been given to developing micro/nano preparations by encapsulating biologically active compounds on polymeric carriers. Therefore, we aimed to extract pectin from sea buckthorn peel, prepare microcapsules containing antibiotics, and determine their physical and chemical properties. Methods: Wastes were separated from sea buckthorn under “Medical raw materials Dry fruit of Hippophae rhamnoides MNS 5225:2002”. Pectin was isolated from sea buckthorn waste according to the “method for determination of pectins MNS3080:1981” standard. The degree of esterification was determined according to ISO 7623:2016. Antibiotic encapsulation with coacervates and water-based emulsions was performed. Antibiotic sensitivity was determined by microdilution according to the Clinical Laboratory Standard Institute (МТ100-S27) method. The results were determined between standard strains of Staphylococcus aureus ATCC 29213 and MRSA ATCC 2758 at different dilution concentrations. Result: Pectin is a brown powder with a sour taste and no odor. There was 71.4% esterification of pectin, 8.9% yield, 1.3% free carboxyl group, 3.2% methylated carboxyl group, 4.5% total carboxyl group, 3.5% ash, and 0.1% nitrogen. A study of the antibacterial activity of pectin containing doxycycline hyclate found that the inhibition of bacterial growth was 0.8 times less than that of pure pectin. It was 1 time less than that of doxycycline alone, and 33 times smaller than t

关键词： Pectin Microparticles Antibacterial MRSA Doxycycline Hyclate

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：