Computational Problems of Electrical Engineering最新文献_第3页

Control of mathematical modeling process of dynamics of harmful substances concentrations on the basis of ontological approach 基于本体论方法的有害物质浓度动力学数学建模过程控制

Computational Problems of Electrical Engineering Pub Date : 2022-06-02 DOI: 10.23939/jcpee2022.01.007

M. Dyvak, A. Melnyk, A. Pukas, L. Dostálek

{"title":"Control of mathematical modeling process of dynamics of harmful substances concentrations on the basis of ontological approach","authors":"M. Dyvak, A. Melnyk, A. Pukas, L. Dostálek","doi":"10.23939/jcpee2022.01.007","DOIUrl":"https://doi.org/10.23939/jcpee2022.01.007","url":null,"abstract":"The problem of building a mathematical model of the dynamics of nitrogen dioxide concentrations at different parts of the city is considered in the paper. The peculiarities of the construction of such models on the basis of periodic measurement of concentrations of harmful substances and identification on the basis of the measurements obtained are considered. This paper also proposes an ontological approach as a control tool that greatly simplifies the systematic standardized methods of the models storage, the process of their construction and appropriate usage in practice. The use of the ontological model allows formalizing the process of obtaining, storing and using relevant knowledge and is suitable for more intelligent systems, such as identification of obviously erroneous solutions based on the model, predictive control of the model, optimization of the decision-making process based on knowledge and modeling of an appropriate technological flow chart. This paper also describes the features of the construction of the corresponding ontological model, the pattern of choice of a nonlinear model with \"switching\" to different conditions. Relevant experimental studies have also been conducted to confirm the effectiveness of the proposed approach.","PeriodicalId":325908,"journal":{"name":"Computational Problems of Electrical Engineering","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122868975","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: 1

Transport phenomena in copper doped cadmium telluride: calculation from the first principles 铜掺杂碲化镉的输运现象:从第一性原理计算

Computational Problems of Electrical Engineering Pub Date : 2022-06-02 DOI: 10.23939/jcpee2022.01.037

O. Malyk, I. Petrovych, H. Kenyo

引用次数: 0

Quantum accumulation of electrical energy at interfacial boundaries in heterophase inorganic / organic clathrates 异相无机/有机包合物界面边界处电能的量子积累

Computational Problems of Electrical Engineering Pub Date : 2022-06-02 DOI: 10.23939/jcpee2022.01.030

V. Maksymych, R. Shvets, F. Ivashchyshyn

引用次数: 0

Ways and methods of improving the effciency of overhead power line 提高架空电力线路效率的途径和方法

Computational Problems of Electrical Engineering Pub Date : 2021-11-30 DOI: 10.23939/jcpee2021.02.018

Artem Savieliev

引用次数: 0

Correlation of the glass transition temperature and average energetic connectivity in network chalcogenide glasses 网络硫系玻璃的玻璃化转变温度与平均能连通性的关系

Computational Problems of Electrical Engineering Pub Date : 2021-11-30 DOI: 10.23939/jcpee2021.02.032

M. Shpotyuk, O. Shpotyuk

{"title":"Correlation of the glass transition temperature and average energetic connectivity in network chalcogenide glasses","authors":"M. Shpotyuk, O. Shpotyuk","doi":"10.23939/jcpee2021.02.032","DOIUrl":"https://doi.org/10.23939/jcpee2021.02.032","url":null,"abstract":"A correlation ratio between a glass transition temperature Tg and average bond energy E (obtained for chalcogenide glasses in L. Tichý & H. Tichá [J. Non-Cryst. Solids, 189, 1995]) was critically analyzed in this paper. As a result, this ratio was shown to have been obtained using incorrect calculations of the average bond energy E through inappropriate application of different averaging procedures for different terms of this parameter and, therefore, it cannot be used in practice. A mathematical algorithm for calculating the average energy bonding was adjusted by the atom-averaging procedure for the both energy of the “network part of a matrix” Ec (energy of heteropolar bonds) and energy of a \"residual matrix\" Erm (energy of homopolar bonds), as well as considering the impossibility of forming covalent chemical bonds between cations of different type. It was stated that the linear ratio between the glass transition temperature Tg and energy bonding E can be obtained by the ratio Tg ≅ 326∙(E – 0.94) and this claim was proved for 145 typical representatives of the covalent-bonded network chalcogenide glasses (Ge-As-S/Se-type systems).","PeriodicalId":325908,"journal":{"name":"Computational Problems of Electrical Engineering","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127885737","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

Criterion modelling of the process of redundancy of renewable energy sources power generation instability by electrochemical accumulators 电化学蓄能器对可再生能源发电不稳定冗余过程的准则建模

Computational Problems of Electrical Engineering Pub Date : 2021-11-30 DOI: 10.23939/jcpee2021.02.012

P. Lezhniuk, V. Komar, O. Rubanenko

{"title":"Criterion modelling of the process of redundancy of renewable energy sources power generation instability by electrochemical accumulators","authors":"P. Lezhniuk, V. Komar, O. Rubanenko","doi":"10.23939/jcpee2021.02.012","DOIUrl":"https://doi.org/10.23939/jcpee2021.02.012","url":null,"abstract":"The paper analyzes the methods and ways for the redundancy of renewable energy sources (RESs) instability in electric power systems (PS). It is shown that these can be maneuverable capacities, in particular, thermal and hydropower plants, accumulators, hydrogen technologies, biogas plants. It is substantiated that, for various reasons, for the RESs to be developed and their capacity to be increased in power systems, electrochemical accumulators and highly maneuverable capacities existing in the PS are the most prepared for implementation. Mathematical models based on similarity theory and the criterion method have been developed for them. This approach is preferable due to the fact that with the minimum available information, it provides the opportunity to compare different ways of compensation of RESs generation instability, to assess their proportionality, as well as to determine the sensitivity of costs to the capacity of the redundancy methods. Criterion models which allow us to design dependences of the costs for the redundancy of RESs generation instability on the capacity of electrochemical accumulators, on the capacity of the system reserve, as well as on the capacity of power lines have been formed. Such dependencies make it possible to more reasonably choose certain methods of redundancy in accordance with the characteristics and requirements of PS.","PeriodicalId":325908,"journal":{"name":"Computational Problems of Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130399538","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: 1

Electrical interaction of electron-proton tandem 电子-质子串联的电相互作用

Computational Problems of Electrical Engineering Pub Date : 2021-11-30 DOI: 10.23939/jcpee2021.02.038

Vasyl Tchaban

引用次数: 1

Research into machine learning algorithms for the construction of mathematical models of multimodal data classification problems 多模态数据分类问题数学模型构建的机器学习算法研究

Computational Problems of Electrical Engineering Pub Date : 2021-11-30 DOI: 10.23939/jcpee2021.02.001

N. Boyko

引用次数: 0

Sputtering rate of lead, tin and germanium tellurides with low energy argon ions 低能氩离子对碲化铅、锡和锗的溅射速率研究

Computational Problems of Electrical Engineering Pub Date : 2021-04-25 DOI: 10.23939/jcpee2021.01.036

D. Zayachuk, Vasyl E. Slynko, A. Csík

{"title":"Sputtering rate of lead, tin and germanium tellurides with low energy argon ions","authors":"D. Zayachuk, Vasyl E. Slynko, A. Csík","doi":"10.23939/jcpee2021.01.036","DOIUrl":"https://doi.org/10.23939/jcpee2021.01.036","url":null,"abstract":"Sputtering of PbTe, SnTe, and GeTe crystal samples by low-energy Ar+ ions are investigated, and the sputtering rate vsp of the studied compounds, as well as its dependence on both the composition of crystal matrix and the sputtering energy are determined. It is found that under the same conditions the sputtering rate in the sequence of GeTe-SnTe-PbTe telluride compounds increases when their average atomic weight increases. This phenomenon is explained by changes in the surface binding energy of metal atoms in lead, tin and germanium tellurides. It is shown that for all compounds the sputtering rate also increases with the increase in the sputtering energy. In the energy range from 160 to 550 eV,this increase is almost linear. The coefficients of change in the sputtering rate with energy dvsp/dE are calculated. The surface density of Ar+ ion-induced structures and the relative area of the sputtered surface covered by these structures are determined for the natural lateral surfaces of a PbTe crystal grown from melt by the Bridgman method as a function of sputtering energy. It is shown that both studied parameters decrease exponentially with increasing the sputtering energy.","PeriodicalId":325908,"journal":{"name":"Computational Problems of Electrical Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123548877","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 magnetic fields of electrical devices based on their circuit models 基于电路模型的电气器件磁场分析

Computational Problems of Electrical Engineering Pub Date : 2021-04-25 DOI: 10.23939/jcpee2021.01.007

V. Horyachko, O. Hamola, Taras Ryzhyi

引用次数: 0