Б. Тайванбат, О. Алтансүх, М. Энх-Үүр, K. Van Leeuwen, Steven H. A. Koop
{"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}
{"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}
{"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}
N. Byambajargal, B. Ankhbayar, Khorloo Oyundolgor, A. Enkhbayar
{"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}