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Proceedings of the Technical University of Sofia最新文献

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Analysis of the Real Estate Market in Sofia, Bulgaria, during the COVID-19 pandemic 2019冠状病毒病疫情期间保加利亚索非亚房地产市场分析
Proceedings of the Technical University of Sofia Pub Date : 2022-04-01 DOI: 10.47978/tus.2022.72.01.003
M. Marinov, I. Draganov
{"title":"Analysis of the Real Estate Market in Sofia, Bulgaria, during the COVID-19 pandemic","authors":"M. Marinov, I. Draganov","doi":"10.47978/tus.2022.72.01.003","DOIUrl":"https://doi.org/10.47978/tus.2022.72.01.003","url":null,"abstract":"","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128839390","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}
引用次数: 0
An Оverview of the Мultipath Тechnologies, their Importance and Types 一个Оverview的Мultipath Тechnologies，他们的重要性和类型
Proceedings of the Technical University of Sofia Pub Date : 2022-04-01 DOI: 10.47978/tus.2022.72.01.004
N. Jabbar, G. Lencse
{"title":"An Оverview of the Мultipath Тechnologies, their Importance and Types","authors":"N. Jabbar, G. Lencse","doi":"10.47978/tus.2022.72.01.004","DOIUrl":"https://doi.org/10.47978/tus.2022.72.01.004","url":null,"abstract":"One of the challenges for networks that operate according to traditional protocols is to solve the limitations of the single interface or the single path. Especially in mobile phone networks (4G, 5G, and Wi-Fi) and networks that support smart devices, it is an important question, how to take advantage of network resources or distribute traffic between paths and choose the alternative path in case the current path fails. As a result of the rapid development of applications that depend on the multipath interface, a massive increase in traffic has been occurred. The solutions and algorithms that were studied and discussed gave realistic and distinct solutions to increase throughput and reduce delays, which in turn achieves obtaining high-quality data transmission through multiple paths and thus be able to aggregate resources and reduce blocking in the network in terms of QoS (Quality of Service), QoE (Quality of Experience), which allows faster data transfer compared to cases that use a single path. In this paper, we review a set of technologies that provide multipath services (such as MPT, MPTCP, MMPTCP, AOMDV, and OAOMDV) which have been designed and proven through researchers' experiments to be helpful and promising in solving the above problems. Most of these multipath technologies are in the process of being built, some of which need additions to deal with data packets and others to be sufficient and comprehensive facing with the rapid growth of technology.","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128667336","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}
引用次数: 4
Design of EEG Experiments for Motor Imagery Mental Task Classification 运动意象心理任务分类的脑电实验设计
Proceedings of the Technical University of Sofia Pub Date : 2021-12-07 DOI: 10.47978/tus.2022.72.01.001
Ivaylo Ivaylov, A. Manolova, Milena Lazarova
{"title":"Design of EEG Experiments for Motor Imagery Mental Task Classification","authors":"Ivaylo Ivaylov, A. Manolova, Milena Lazarova","doi":"10.47978/tus.2022.72.01.001","DOIUrl":"https://doi.org/10.47978/tus.2022.72.01.001","url":null,"abstract":"","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"136 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120977074","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}
引用次数: 0
Aviation Services in Tourism during the COVID-19 Pandemic 2019冠状病毒病大流行期间的旅游航空服务
Proceedings of the Technical University of Sofia Pub Date : 2021-12-07 DOI: 10.47978/tus.2022.72.01.002
Aneta Blazheva, T. Tashev, I. Draganov
{"title":"Aviation Services in Tourism during the COVID-19 Pandemic","authors":"Aneta Blazheva, T. Tashev, I. Draganov","doi":"10.47978/tus.2022.72.01.002","DOIUrl":"https://doi.org/10.47978/tus.2022.72.01.002","url":null,"abstract":"In this paper, an investigation is being made over the tendency of air flights rate around the world due to the COVID-19 pandemic in 2020 considering all the negative effects in limiting tourist mobility. There is an attempt to support the customer activities in tourism through travel information portals with suitably extended marketing strategies some of which are being effectively applied in this study. These include but are not limited to active maintenance of Facebook page, weekly Newsletters, and others which prove to be stimulating the user’s interests as some of the presented statistics show.","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128018706","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}
引用次数: 0
Fractional Control of а Model of the Current-Decoupled AC Motor 电流解耦交流电机模型的分式控制
Proceedings of the Technical University of Sofia Pub Date : 2021-11-04 DOI: 10.47978/tus.2021.71.04.002
B. Grasiani, N. Nikolova
{"title":"Fractional Control of а Model of the Current-Decoupled AC Motor","authors":"B. Grasiani, N. Nikolova","doi":"10.47978/tus.2021.71.04.002","DOIUrl":"https://doi.org/10.47978/tus.2021.71.04.002","url":null,"abstract":"This paper proposes an approach to oppose the parameters disturbances in control system. This control principle is applied in the present work to the Current-Decoupled AC Motor of a technological module. Index Terms – fractal control, robust stability margin, robust performance margin, robust performance, robust stability.","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115446688","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}
引用次数: 0
Application of Volume of Fluid Method for the Droplet Modelling in Microfluidic Channels 流体体积法在微流体通道中液滴建模中的应用
Proceedings of the Technical University of Sofia Pub Date : 2021-11-04 DOI: 10.47978/tus.2021.71.04.001
Emil Grigorov
{"title":"Application of Volume of Fluid Method for the Droplet Modelling in Microfluidic Channels","authors":"Emil Grigorov","doi":"10.47978/tus.2021.71.04.001","DOIUrl":"https://doi.org/10.47978/tus.2021.71.04.001","url":null,"abstract":"We used the volume-of-fluid (VOF) method to investigate the droplet formation regime and its transition in a square microfluidic flow-focusing device. Droplet shape, size, and its formation frequency were examined in a threedimensional numerical simulation. The results were evaluated through examination of the regimes of droplet formation and the formation of droplet of given size as a function of different parameters. Comparison of the simulation results with preexisting experimental data from the literature showed good agreement, validating the VOF","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123953650","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}
引用次数: 0
Analysis of Load Profiles with Dynamic Loads, External Consumption and Added PV Generation 动态负荷、外部消耗和新增光伏发电的负荷分析
Proceedings of the Technical University of Sofia Pub Date : 2021-11-04 DOI: 10.47978/tus.2021.71.04.009
G. Milushev
{"title":"Analysis of Load Profiles with Dynamic Loads, External Consumption and Added PV Generation","authors":"G. Milushev","doi":"10.47978/tus.2021.71.04.009","DOIUrl":"https://doi.org/10.47978/tus.2021.71.04.009","url":null,"abstract":"The Examination of Load Profiles is powerful method for specifying problematic loads in installations. The examiner experience plays a significant role in reaching the proper conclusions and deciding the next actions to mitigate negative effects, disconnection, replacing or removal of the problematic loads. Usually, an examiner gains experience over time as they encounter various cases throughout their career. A way expedite the process of obtaining better experience is by sharing and studying complex cases documented by other experts from the engineering community. The present paper aims to share an experience of analysis of load profiles of a client with very dynamic own loads, additional external consumption out of his own premises, and installed PV generation for internal needs only. Index Terms — Energy efficiency, Load management, Photovoltaic systems, Power engineering, Power generation","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129683834","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}
引用次数: 0
Operation with a Smart Manufacturing System 使用智能制造系统进行操作
Proceedings of the Technical University of Sofia Pub Date : 2021-11-04 DOI: 10.47978/tus.2021.71.04.006
A. Taneva, K. Kutryanski, M. Petrov
{"title":"Operation with a Smart Manufacturing System","authors":"A. Taneva, K. Kutryanski, M. Petrov","doi":"10.47978/tus.2021.71.04.006","DOIUrl":"https://doi.org/10.47978/tus.2021.71.04.006","url":null,"abstract":"The aim of this paper is to present basic hardware components of a flexible assembly system (FAS) and discuss it characteristics, classify the systems and describe a real application. The FAS-200 system offers professional training according to the industrial reality, simulating a real assembly process and including different technologies from Industry 4.0. This system consists of an automated flexible assembly cell with five different stages: assembly, handling, quality inspection, transfer and warehouse. The FAS-200 system is the ideal answer to research and training in industrial automation. It is fully modular and flexible equipment and in keeping with industrial reality. The technologies included in its different assembly modules, as well as the assembly process with several variants, allow the user to develop the professional skills required by modern automated industry. Index Terms — Flexible manufacturing systems, Flexible assembly systems, Intelligent manufacturing systems.","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130823903","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}
引用次数: 0
Robust DRC-Systems 健壮的DRC-Systems
Proceedings of the Technical University of Sofia Pub Date : 2021-11-04 DOI: 10.47978/tus.2021.71.04.004
Emil Nikolov
{"title":"Robust DRC-Systems","authors":"Emil Nikolov","doi":"10.47978/tus.2021.71.04.004","DOIUrl":"https://doi.org/10.47978/tus.2021.71.04.004","url":null,"abstract":"In this work are proposed, researched and analyzed structures, methods and algorithms for designing of fractional DRC-, DRC.Clegg-, DRC.Clegg.Inverserobust systems. For their development, inverse solutions of the synthesis problem were used using rational fractional operators from the theory of generalized fractional calculus. Their potential advantages are proven. Results of perturbation analysis for numerical example are presented. Index Terms inverses models, fractional DRC-, DRC.Clegg-, DRC.Clegg.Inverse-systems, ML-Clegg-differentiation filters, perturbation quality analysis.","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114893982","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}
引用次数: 0
Enzyme Biosensor for Determination of Glucose in Honey Bee 酶生物传感器测定蜜蜂体内葡萄糖
Proceedings of the Technical University of Sofia Pub Date : 2021-11-04 DOI: 10.47978/tus.2021.71.04.007
A. Pandelova, D. Dimitrov, N. Stoyanov
{"title":"Enzyme Biosensor for Determination of Glucose in Honey Bee","authors":"A. Pandelova, D. Dimitrov, N. Stoyanov","doi":"10.47978/tus.2021.71.04.007","DOIUrl":"https://doi.org/10.47978/tus.2021.71.04.007","url":null,"abstract":"an enzyme biosensor for determination of glucose in honey was developed by using enzyme glucose oxidase. The measuring range of the biosensor and its response are determined. A measurement with real samples was made. Index Terms — biosensor, glucose, honey","PeriodicalId":280258,"journal":{"name":"Proceedings of the Technical University of Sofia","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124415908","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}
引用次数: 0
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