Б. Тайванбат, О. Алтансүх, М. Энх-Үүр, K. Van Leeuwen, Steven H. A. Koop
The large number of people living together in urban areas requires a comprehensive solutions for issues such as the reasonable allocation and adequate use of natural resources, urban planning, and efficient waste management to meet the city's needs. One of the main factors influencing the health and comfort of urban residents is the supply of clean water and sewerage systems. Therefore, in order to rationally allocate and use water resources to meet urban needs, and to create a healthy and comfortable living environment for city residents, it is necessary to develop an integrated water resources management plan at the national and basin levels, as well as an integrated water management plan and assessment for city level. In addition to assessing the current state of water management, it is important to identify factors and trends that may further strain water resources to prevent future risks. To address the pressures on water management in Ulaanbaatar and Darkhan, representing Mongolia's urban areas, the City Blueprint Approach, developed by the EU Water Innovation Partnership and the Dutch Institute of Water Cycle, was used in this study. Currently, this approach is used in about 80 cities in more than 40 countries, it is a relatively new and innovative method among Asian cities. As a result, water management in Ulaanbaatar and Darkhan is hampered by both social, economic, and environmental factors.
{"title":"Хот суурин газрын усны нөөцийн нэгдсэн менежментийн үнэлгээ: Чиг хандлага ба нөлөөллийн тогтолцоо","authors":"Б. Тайванбат, О. Алтансүх, М. Энх-Үүр, K. Van Leeuwen, Steven H. A. Koop","doi":"10.22353/mjeas.v2i1.49","DOIUrl":"https://doi.org/10.22353/mjeas.v2i1.49","url":null,"abstract":"The large number of people living together in urban areas requires a comprehensive solutions for issues such as the reasonable allocation and adequate use of natural resources, urban planning, and efficient waste management to meet the city's needs. One of the main factors influencing the health and comfort of urban residents is the supply of clean water and sewerage systems. Therefore, in order to rationally allocate and use water resources to meet urban needs, and to create a healthy and comfortable living environment for city residents, it is necessary to develop an integrated water resources management plan at the national and basin levels, as well as an integrated water management plan and assessment for city level. In addition to assessing the current state of water management, it is important to identify factors and trends that may further strain water resources to prevent future risks. To address the pressures on water management in Ulaanbaatar and Darkhan, representing Mongolia's urban areas, the City Blueprint Approach, developed by the EU Water Innovation Partnership and the Dutch Institute of Water Cycle, was used in this study. Currently, this approach is used in about 80 cities in more than 40 countries, it is a relatively new and innovative method among Asian cities. As a result, water management in Ulaanbaatar and Darkhan is hampered by both social, economic, and environmental factors.","PeriodicalId":205479,"journal":{"name":"Mongolian Journal of Engineering and Applied Sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114761179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Organic electroluminescence (EL) is a process of degradation, which is the result of the degradation process, as well as the degradation of the mechanisms of the court.降解過程不僅是降解的結果，也是法庭判決的過程。Iimd enehү sudalgaany ajlaar indium tsagaan tugalgaan oxide (ITO)、N,N'-二苯基-N,N'-二(3-甲基苯基)-[1,1'-二苯基]-4,4'-二胺(TPD)、hөngөn tsagaany 三(8-羟基喹啉)(8-羥基喹啉)(Alq3)是金屬鋁的電極。烏克蘭的金屬電極在80°C、120°C的溫度下，有機電解質的降解過程。原子場顯微鏡（AFM）-yin 已被用來確定有機物的形態和結晶過程。在有机 EL 有机物中，需要使用金属 Al 电极作为阴极（金属 Al 电极的阴极的阴极）、阴极盐溶过程）是 AFM 有机发光过程中最重要的部分，是 AFM 降解过程的第一步。
Changes in the weight of copper concentrate from oxidation and a decrease in copper content create economic losses. Mining plants having problems with increasing overall weight of the copper concentrate and reduction of the copper composition after a certain period of transport and handling. Trivalent iron, one of the main oxidizing factors of the copper concentrate, is a strong oxidizer that oxidized copper sulfide minerals as well as other minerals in the concentrate, which is formed by the oxidation of pyrite. Generally, mass change can occur during electron transition and phase transfer. Therefore, the chemical mechanism, oxidation process, and content alteration of the main components in copper concentrate were studied in this study in order to solve and define those problems. To study the real condition of the copper concentrate oxidation, the oxidation process of the copper concentrate was studied under 3 conditions such as in the shadow, in the sun, and the storage. Mongolian National Standard and International standards (MNS2078:1984, ISO 10258:2018) and XRD, AAS, ICP analysis were used to study the main components of the copper concentrate. By the study on the oxidation of copper concentrate at the mine site, copper was decreased by 0.77-0.85%, and iron was reduced by 0.30-0.64%. As a result of the oxidation study of concentrate that is kept in the mining site, temperature, relative humidity, and pH were highly correlated with concentrate oxidation.
氧化引起的铜精矿重量的变化和铜含量的减少造成经济损失。矿山在经过一定的运输和处理后，铜精矿总重增加，铜成分减少。三价铁是铜精矿的主要氧化因素之一，是一种强氧化剂，可以氧化硫化铜矿物以及精矿中的其他矿物，是由黄铁矿氧化形成的。一般来说，在电子跃迁和相转移过程中会发生质量变化。因此，本研究对铜精矿的化学机理、氧化过程、主要组分含量变化等进行了研究，以期解决和明确这些问题。为研究铜精矿氧化的真实情况，对铜精矿在阴暗处、日晒下和贮存下的氧化过程进行了研究。采用蒙古国家标准和国际标准(MNS2078:1984, ISO 10258:2018)和XRD、AAS、ICP分析对铜精矿的主要成分进行了研究。通过对现场铜精矿的氧化研究，铜的还原量为0.77 ~ 0.85%，铁的还原量为0.30 ~ 0.64%。通过对矿点保存的精矿氧化研究发现，温度、相对湿度和pH值与精矿氧化高度相关。
{"title":"Study of the effect of chalcopyrite and pyrite minerals on the oxidation of copper sulfide concentrate","authors":"G. G., Maralmaa. B, E. D","doi":"10.22353/mjeas.v2i1.48","DOIUrl":"https://doi.org/10.22353/mjeas.v2i1.48","url":null,"abstract":"Changes in the weight of copper concentrate from oxidation and a decrease in copper content create economic losses. Mining plants having problems with increasing overall weight of the copper concentrate and reduction of the copper composition after a certain period of transport and handling. Trivalent iron, one of the main oxidizing factors of the copper concentrate, is a strong oxidizer that oxidized copper sulfide minerals as well as other minerals in the concentrate, which is formed by the oxidation of pyrite. Generally, mass change can occur during electron transition and phase transfer. Therefore, the chemical mechanism, oxidation process, and content alteration of the main components in copper concentrate were studied in this study in order to solve and define those problems. To study the real condition of the copper concentrate oxidation, the oxidation process of the copper concentrate was studied under 3 conditions such as in the shadow, in the sun, and the storage. Mongolian National Standard and International standards (MNS2078:1984, ISO 10258:2018) and XRD, AAS, ICP analysis were used to study the main components of the copper concentrate. By the study on the oxidation of copper concentrate at the mine site, copper was decreased by 0.77-0.85%, and iron was reduced by 0.30-0.64%. As a result of the oxidation study of concentrate that is kept in the mining site, temperature, relative humidity, and pH were highly correlated with concentrate oxidation.","PeriodicalId":205479,"journal":{"name":"Mongolian Journal of Engineering and Applied Sciences","volume":"288 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133597042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In Mongolia, energy demand is increasing rapidly and installed capacity cannot keep up the demand due to a weak condition of both electricity access and grid structure. According to a survey, primary electricity demand by 2025 would be higher in the central region and tend to increase in other regions. Full coverage of the country by grid extension is difficult from a technical as well as an economic perspective because of high investment costs and high electrical loss over long distances, and low demand in the remote regions. Therefore, small power systems are suitable in remote regions and typical large-size power systems are not a very good option. However, a small fast reactor system may be suitable, having unique characters, to reduce nuclear waste and effective use of nuclear fuel. In this study, a preliminary design study on a small breed and burn type fast reactor was carried out using continuous energy Monte Carlo code MVP/GMVP II with the JENDL-3.3 data library. In the concept of breed and burn, igniting a burning wave is an important concern. This study concerns the igniting burning wave with enriched uranium for initiating the conversion process. As seen from the result, the proposed small reactor could operate more than seventy years under breed and burn mode.
{"title":"IGNITING BURNING WAVE IN A SMALL NUCLEAR REACTOR SUITABLE FOR REMOTE AREAS IN MONGOLIA","authors":"T. A, M. B, O. S","doi":"10.22353/mjeas.v2i1.52","DOIUrl":"https://doi.org/10.22353/mjeas.v2i1.52","url":null,"abstract":"In Mongolia, energy demand is increasing rapidly and installed capacity cannot keep up the demand due to a weak condition of both electricity access and grid structure. According to a survey, primary electricity demand by 2025 would be higher in the central region and tend to increase in other regions. Full coverage of the country by grid extension is difficult from a technical as well as an economic perspective because of high investment costs and high electrical loss over long distances, and low demand in the remote regions. Therefore, small power systems are suitable in remote regions and typical large-size power systems are not a very good option. However, a small fast reactor system may be suitable, having unique characters, to reduce nuclear waste and effective use of nuclear fuel. In this study, a preliminary design study on a small breed and burn type fast reactor was carried out using continuous energy Monte Carlo code MVP/GMVP II with the JENDL-3.3 data library. In the concept of breed and burn, igniting a burning wave is an important concern. This study concerns the igniting burning wave with enriched uranium for initiating the conversion process. As seen from the result, the proposed small reactor could operate more than seventy years under breed and burn mode.","PeriodicalId":205479,"journal":{"name":"Mongolian Journal of Engineering and Applied Sciences","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121983011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-03DOI: 10.22353/mjeas.v1i01.911
N. Byambajargal, B. Ankhbayar, Khorloo Oyundolgor, A. Enkhbayar
In this paper, we introduce a multi-stage fine registration technique for registering noisy point clouds. At each stage, discrete surfaces that overlap each other are simultaneously transformed into a frequency domain by a fast Fourier transform (FFT) algorithm. In the frequency domain, an adjustable function is used as the low-pass filter, and then discrete surfaces are reconstructed by an inverse Fourier transform. The iterative closest point algorithm is used to register the newly generated surfaces and obtain the registration parameters. We then registered the original point clouds by using these parameters. The next stages are implemented in the same way as in the above; only the parameters are changed in the filter. After a few stages, our method can give a better result for the registration of noisy point clouds. We experimented with the proposed method for registering many types of noisy point clouds such as noisy point clouds with different noise levels or noisy and sparse point sets.
{"title":"Noisy Point Clouds Registration Using FFT Based on Multi-Stage Noise Removal","authors":"N. Byambajargal, B. Ankhbayar, Khorloo Oyundolgor, A. Enkhbayar","doi":"10.22353/mjeas.v1i01.911","DOIUrl":"https://doi.org/10.22353/mjeas.v1i01.911","url":null,"abstract":"In this paper, we introduce a multi-stage fine registration technique for registering noisy point clouds. At each stage, discrete surfaces that overlap each other are simultaneously transformed into a frequency domain by a fast Fourier transform (FFT) algorithm. In the frequency domain, an adjustable function is used as the low-pass filter, and then discrete surfaces are reconstructed by an inverse Fourier transform. The iterative closest point algorithm is used to register the newly generated surfaces and obtain the registration parameters. We then registered the original point clouds by using these parameters. The next stages are implemented in the same way as in the above; only the parameters are changed in the filter. After a few stages, our method can give a better result for the registration of noisy point clouds. We experimented with the proposed method for registering many types of noisy point clouds such as noisy point clouds with different noise levels or noisy and sparse point sets.","PeriodicalId":205479,"journal":{"name":"Mongolian Journal of Engineering and Applied Sciences","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125520404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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