Coronavirus SARS-CoV-2 enters the host cell via binding with the angiotensin-converting enzyme 2 (ACE2), and here we used computational modelling to study the molecular recognition pattern of this interaction The fragment of the N-terminal part of the enzyme containing amino acids 19-45 was used as the lead peptide in this study The structure of this peptide was systematically modified by successive replacement of its amino acids with alanine, serine, glycine, and phenylalanine Then docking energies were calculated for all these mutant peptides These docking energies were correlated with physical descriptors, proposed for the modelling of peptide-protein interactions, characterizing hydrophilicity and volume-related properties of amino acid side chains From these correlations the corresponding specificity factors were obtained for all amino acid positions, and thus the full description of the molecular recognition pattern of the ACE2 alpha 1 domain by the virus S1 protein binding site was obtained
{"title":"Mapping the ACE2 binding site on the SARS-CoV-2 spike protein S1: molecular recognition pattern","authors":"A. Kuznetsov, J. Järv","doi":"10.3176/proc.2020.4.09","DOIUrl":"https://doi.org/10.3176/proc.2020.4.09","url":null,"abstract":"Coronavirus SARS-CoV-2 enters the host cell via binding with the angiotensin-converting enzyme 2 (ACE2), and here we used computational modelling to study the molecular recognition pattern of this interaction The fragment of the N-terminal part of the enzyme containing amino acids 19-45 was used as the lead peptide in this study The structure of this peptide was systematically modified by successive replacement of its amino acids with alanine, serine, glycine, and phenylalanine Then docking energies were calculated for all these mutant peptides These docking energies were correlated with physical descriptors, proposed for the modelling of peptide-protein interactions, characterizing hydrophilicity and volume-related properties of amino acid side chains From these correlations the corresponding specificity factors were obtained for all amino acid positions, and thus the full description of the molecular recognition pattern of the ACE2 alpha 1 domain by the virus S1 protein binding site was obtained","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69946527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Tufail, P. Paris, I. Jõgi, M. Aints, A. Siiman, H. Riisalu, M. Laan
. Diffuse reflectance spectroscopy in near infrared region was used as a fast laboratory method for quantitative assessment of the calorific value and the moisture content of Estonian oil shale. Samples of different caloricity were collected from Narva open cast mine and from beneficiation plant of Estonia underground mine, Estonia. The set of crushed oil shale samples, which moisture content was varied were tested by the help of a commercial multipurpose analyser, where Fouriertransform spectrometer recorded spectra in near infrared region and the software used partial least squares regression method. Results were related to the values of caloricity and moisture content, obtained by the bomb calorimeter and weighing methods, respectively. Bands characterizing organic and inorganic parts of the samples as well as the presence of the free water were ascertained by the infrared spectroscopy. Using the software provided by the analyser, the calorific value and the moisture content of samples were predicted. The prediction error of the lower caloricity was 1 MJkg –1 and prediction error of the weight percent of the moisture content was 1.35%. The comparison between achieved results and the values obtained from earlier laserinduced breakdown spectroscopy (LIBS) measurements shows that in la boratory conditions more precise prediction can be made by diffuse reflectance measurements. Further improvement of the prediction accuracy could be achieved by modified software which considers observed nonlinear effects in spectra.
{"title":"Application of diffuse reflectance spectroscopy for quick laboratory assessment of Estonian oil shale quality","authors":"I. Tufail, P. Paris, I. Jõgi, M. Aints, A. Siiman, H. Riisalu, M. Laan","doi":"10.3176/proc.2020.2.04","DOIUrl":"https://doi.org/10.3176/proc.2020.2.04","url":null,"abstract":". Diffuse reflectance spectroscopy in near infrared region was used as a fast laboratory method for quantitative assessment of the calorific value and the moisture content of Estonian oil shale. Samples of different caloricity were collected from Narva open cast mine and from beneficiation plant of Estonia underground mine, Estonia. The set of crushed oil shale samples, which moisture content was varied were tested by the help of a commercial multipurpose analyser, where Fouriertransform spectrometer recorded spectra in near infrared region and the software used partial least squares regression method. Results were related to the values of caloricity and moisture content, obtained by the bomb calorimeter and weighing methods, respectively. Bands characterizing organic and inorganic parts of the samples as well as the presence of the free water were ascertained by the infrared spectroscopy. Using the software provided by the analyser, the calorific value and the moisture content of samples were predicted. The prediction error of the lower caloricity was 1 MJkg –1 and prediction error of the weight percent of the moisture content was 1.35%. The comparison between achieved results and the values obtained from earlier laserinduced breakdown spectroscopy (LIBS) measurements shows that in la boratory conditions more precise prediction can be made by diffuse reflectance measurements. Further improvement of the prediction accuracy could be achieved by modified software which considers observed nonlinear effects in spectra.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69930993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Rassõlkin, A. Belahcen, A. Kallaste, T. Vaimann, Vyacheslavovich Lukichev, S. Orlova, H. Heidari, B. Asad, Jaime Pando
. Nowadays a lot of attention is paid on the issues of global warming and climate change. Human impact on the environment is noticeable from the aspect of resource life cycles. Energy efficiency requirements have led to the research and development of alternative technologies for the rotating electrical machines. The life cycle assessment brings out important procedures which can help to reduce machines’ impact on the environment, being therefore an instrument for the assessment of the influence of particular products on the environment from cradle to grave – beginning with working out the materials, followed by manufacturing, transporting, marketing, use, and recycling. Three types of electrical machines have been chosen for comparison: synchronous reluctance motor, permanent magnet assisted synchronous reluctance motor and induction motor. The article presents a life cycle assessment case study based on experimental results of motors designed by the research group.
{"title":"Life cycle analysis of electrical motor-drive system based on electrical machine type","authors":"A. Rassõlkin, A. Belahcen, A. Kallaste, T. Vaimann, Vyacheslavovich Lukichev, S. Orlova, H. Heidari, B. Asad, Jaime Pando","doi":"10.3176/proc.2020.2.07","DOIUrl":"https://doi.org/10.3176/proc.2020.2.07","url":null,"abstract":". Nowadays a lot of attention is paid on the issues of global warming and climate change. Human impact on the environment is noticeable from the aspect of resource life cycles. Energy efficiency requirements have led to the research and development of alternative technologies for the rotating electrical machines. The life cycle assessment brings out important procedures which can help to reduce machines’ impact on the environment, being therefore an instrument for the assessment of the influence of particular products on the environment from cradle to grave – beginning with working out the materials, followed by manufacturing, transporting, marketing, use, and recycling. Three types of electrical machines have been chosen for comparison: synchronous reluctance motor, permanent magnet assisted synchronous reluctance motor and induction motor. The article presents a life cycle assessment case study based on experimental results of motors designed by the research group.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69931351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
One of the most important drawbacks limiting the application of MoS2 nanotubes (NTs) as an oil additive is their temperature sensitivity. Recent studies showed that MoS2 NTs can be substituted by MoO3 NTs in conjunction with S-containing lubricants by exploiting a novel approach of in-situ tribochemical sulphurization. The objective of this work was to investigate the temperature influence on tribological properties of innovative lubricant additives in the form of MoS2 and MoO3 NTs. The NTs were mixed in base oil with and without the presence of S-containing additives. The tribological performance was investigated using a SRV reciprocating sliding testing machine in a steel ball on a steel disc configuration under temperature ramping conditions. The results showed very positive synergy between the traditional anti-wear additive and the innovative MoO3 and MoS2 NTs, causing superb tribological performance up to temperatures of 200 °C. The presented findings show that the in-situ sulphurization of MoO3 NTs was promoted by using the traditional zinc dialkyl dithiophosphates (ZDDP) anti-wear additive, which ensured the stability of this additive combination at severe oil temperature and tribotest conditions. The tribochemically formed tribofilm derived from ZDDP and in-situ sulphurized MoO3 was much thicker compared to other lubricating blends investigated in our research so far.
{"title":"Tribological synergy between classical ZDDP and innovative MoS2 and MoO3 nanotube additives at elevated temperatures","authors":"A. Tomala, M. R. Ripoll, R. Michalczewski","doi":"10.3176/PROC.2019.2.09","DOIUrl":"https://doi.org/10.3176/PROC.2019.2.09","url":null,"abstract":"One of the most important drawbacks limiting the application of MoS2 nanotubes (NTs) as an oil additive is their temperature sensitivity. Recent studies showed that MoS2 NTs can be substituted by MoO3 NTs in conjunction with S-containing lubricants by exploiting a novel approach of in-situ tribochemical sulphurization. The objective of this work was to investigate the temperature influence on tribological properties of innovative lubricant additives in the form of MoS2 and MoO3 NTs. The NTs were mixed in base oil with and without the presence of S-containing additives. The tribological performance was investigated using a SRV reciprocating sliding testing machine in a steel ball on a steel disc configuration under temperature ramping conditions. The results showed very positive synergy between the traditional anti-wear additive and the innovative MoO3 and MoS2 NTs, causing superb tribological performance up to temperatures of 200 °C. The presented findings show that the in-situ sulphurization of MoO3 NTs was promoted by using the traditional zinc dialkyl dithiophosphates (ZDDP) anti-wear additive, which ensured the stability of this additive combination at severe oil temperature and tribotest conditions. The tribochemically formed tribofilm derived from ZDDP and in-situ sulphurized MoO3 was much thicker compared to other lubricating blends investigated in our research so far.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3176/PROC.2019.2.09","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69929555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The propagation of signals in nerves is characterized by complexity where the interactions between the electrical signal and accompanying mechanical and thermal effects must be taken into account. That is why in the modelling of wave phenomena the knowledge from physiology, physics, and mathematics must be cast into a whole. In this paper the wave phenomena in nerves are characterized from the viewpoint of complexity and interdisciplinarity, followed by the analysis of principles and criteria in the modelling of biological systems. The central part is the description of the step-by-step approach in building up a coupled mathematical model of signal propagation in axons. Attention is paid to the coupling forces which link the single waves into an ensemble. The mathematical description of the model is presented in the Appendix.
{"title":"Criteria for modelling wave phenomena in complex systems:the case of signals in nerves","authors":"J. Engelbrecht, K. Tamm, T. Peets","doi":"10.3176/PROC.2019.3.05","DOIUrl":"https://doi.org/10.3176/PROC.2019.3.05","url":null,"abstract":"The propagation of signals in nerves is characterized by complexity where the interactions between the electrical signal and accompanying mechanical and thermal effects must be taken into account. That is why in the modelling of wave phenomena the knowledge from physiology, physics, and mathematics must be cast into a whole. In this paper the wave phenomena in nerves are characterized from the viewpoint of complexity and interdisciplinarity, followed by the analysis of principles and criteria in the modelling of biological systems. The central part is the description of the step-by-step approach in building up a coupled mathematical model of signal propagation in axons. Attention is paid to the coupling forces which link the single waves into an ensemble. The mathematical description of the model is presented in the Appendix.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3176/PROC.2019.3.05","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69930217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Focus is on the turbulence for a plunging breaker. Laser Doppler anemometer point measurements were used to determine the velocity matrix of a breaking wave on a sloping bottom. Using the Reynolds stress anisotropy for incompressible fluid, it was found that the ensemble averaged measured velocity predicted eddy viscosity is associated with peaks, which are absent in the broadly accepted empirical predictions. The instantaneous eddy viscosity coefficient was determined according to the Reynolds stresses, modified mean velocity and its gradient components and turbulent kinetic energy. The modified mean velocity and its derivatives improve eddy viscosity predictions during the wave period, which gives evidence that the velocity used corresponds well to a rotational part. In addition to the measurement predictions, empirical formulae were used to estimate the eddy viscosity values during the wave period. Furthermore, a meshless numerical model is proposed to determine artificial viscosity and demonstrate its dependence on eddy viscosity in the case of weakly compressible fluid.
{"title":"Experimental study of eddy viscosity for breaking waves on sloping bottom and comparisons with empirical and numerical predictions","authors":"N. Oldekop, T. Liiv, J. Laanearu","doi":"10.3176/PROC.2019.3.07","DOIUrl":"https://doi.org/10.3176/PROC.2019.3.07","url":null,"abstract":"Focus is on the turbulence for a plunging breaker. Laser Doppler anemometer point measurements were used to determine the velocity matrix of a breaking wave on a sloping bottom. Using the Reynolds stress anisotropy for incompressible fluid, it was found that the ensemble averaged measured velocity predicted eddy viscosity is associated with peaks, which are absent in the broadly accepted empirical predictions. The instantaneous eddy viscosity coefficient was determined according to the Reynolds stresses, modified mean velocity and its gradient components and turbulent kinetic energy. The modified mean velocity and its derivatives improve eddy viscosity predictions during the wave period, which gives evidence that the velocity used corresponds well to a rotational part. In addition to the measurement predictions, empirical formulae were used to estimate the eddy viscosity values during the wave period. Furthermore, a meshless numerical model is proposed to determine artificial viscosity and demonstrate its dependence on eddy viscosity in the case of weakly compressible fluid.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69930289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Manufacturing industry robotization is spreading into wider range of processes. Determination if robotization is suitable for the company is one of the most critical issues before selecting industrial robot and designing the robot cell. A survey was carried out among Estonian small and medium sized manufacturing enterprises (SMEs) for this study to determine the utilization of industrial robot (IR) in the industry. More specific study of production unit was conducted, using gathered information, to estimate how the objectives of the production cell design were achieved. The aim of the present scientific work is to map the knowledge whether robotization is suitable or not for the company or working processes and to appoint parameters obtained after using the robot cell for practical manufacturing processes. The study results comprise the suitability assessment method with the set of criteria and key performance indicators (KPIs), that best describe implemented production unit profitability and help SMEs to gain additional economic-technical information for future robot-based unit development.
{"title":"Suitability analysis of using industrial robots in manufacturing","authors":"T. Kangru, J. Riives, Kashif Mahmood, T. Otto","doi":"10.3176/proc.2019.4.06","DOIUrl":"https://doi.org/10.3176/proc.2019.4.06","url":null,"abstract":"Manufacturing industry robotization is spreading into wider range of processes. Determination if robotization is suitable for the company is one of the most critical issues before selecting industrial robot and designing the robot cell. A survey was carried out among Estonian small and medium sized manufacturing enterprises (SMEs) for this study to determine the utilization of industrial robot (IR) in the industry. More specific study of production unit was conducted, using gathered information, to estimate how the objectives of the production cell design were achieved. The aim of the present scientific work is to map the knowledge whether robotization is suitable or not for the company or working processes and to appoint parameters obtained after using the robot cell for practical manufacturing processes. The study results comprise the suitability assessment method with the set of criteria and key performance indicators (KPIs), that best describe implemented production unit profitability and help SMEs to gain additional economic-technical information for future robot-based unit development.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69930554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Gulistan, N. Yaqoob, Seifedine Kadry, Muhammad Azhar
Using the notion of generalized fuzzy sets, we introduce the notions of generalized fuzzy hyperideals, generalized fuzzy bi-hyperideals, and generalized fuzzy normal bi-hyperideals in an ordered nonassociative and non-commutative algebraic structure, namely an ordered LA-semihypergroup, and we characterize these hyperideals. We provide some results related to the images and preimages of generalized fuzzy hyperideals in ordered LA-semihypergroups.
{"title":"On generalized fuzzy sets in ordered LA-semihypergroups","authors":"M. Gulistan, N. Yaqoob, Seifedine Kadry, Muhammad Azhar","doi":"10.3176/PROC.2019.1.06","DOIUrl":"https://doi.org/10.3176/PROC.2019.1.06","url":null,"abstract":"Using the notion of generalized fuzzy sets, we introduce the notions of generalized fuzzy hyperideals, generalized fuzzy bi-hyperideals, and generalized fuzzy normal bi-hyperideals in an ordered nonassociative and non-commutative algebraic structure, namely an ordered LA-semihypergroup, and we characterize these hyperideals. We provide some results related to the images and preimages of generalized fuzzy hyperideals in ordered LA-semihypergroups.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3176/PROC.2019.1.06","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69929029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Drunka, J. Grabis, D. Jankoviča, D. Rašmane, A. Krumina
Synthesis of TiO2 nanotube coatings, nanoporous coatings, and nanofibres by using titanium anodizing, microplasma electrolytic oxidation, and microwave-assisted hydrothermal synthesis in different regimes was studied. Optimal conditions for each of the methods for obtaining nanostructures were determined. The obtained TiO2 nanofibres and nanotube and nanoporous coatings were modified with Au, Ag, Pt, Pd, S, WO3, and Eu2O3, nanoparticles to improve photocatalytic activity under ultraviolet and visible light irradiation. Photocatalytic properties of photocatalysts were tested by the degradation of methylene blue solution under the influence of ultraviolet and visible light irradiation. The obtained modified photocatalysts exhibited higher photocatalytic activity than pure TiO2 nanostructured photocatalysts. Properties of modified photocatalysts obtained with different methods are compared.
{"title":"Photocatalytic properties of TiO2 nanostructures of different morphology modified with various modifiers","authors":"R. Drunka, J. Grabis, D. Jankoviča, D. Rašmane, A. Krumina","doi":"10.3176/PROC.2019.2.08","DOIUrl":"https://doi.org/10.3176/PROC.2019.2.08","url":null,"abstract":"Synthesis of TiO2 nanotube coatings, nanoporous coatings, and nanofibres by using titanium anodizing, microplasma electrolytic oxidation, and microwave-assisted hydrothermal synthesis in different regimes was studied. Optimal conditions for each of the methods for obtaining nanostructures were determined. The obtained TiO2 nanofibres and nanotube and nanoporous coatings were modified with Au, Ag, Pt, Pd, S, WO3, and Eu2O3, nanoparticles to improve photocatalytic activity under ultraviolet and visible light irradiation. Photocatalytic properties of photocatalysts were tested by the degradation of methylene blue solution under the influence of ultraviolet and visible light irradiation. The obtained modified photocatalysts exhibited higher photocatalytic activity than pure TiO2 nanostructured photocatalysts. Properties of modified photocatalysts obtained with different methods are compared.","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3176/PROC.2019.2.08","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69929520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Nguyen, M. Tran, Duy-Hung Ha, T. Trang, M. Voznák
{"title":"Multi-source in DF cooperative networks with the PSR protocol based full-duplex energy harvesting over a Rayleigh fading channel: performance analysis","authors":"T. Nguyen, M. Tran, Duy-Hung Ha, T. Trang, M. Voznák","doi":"10.3176/PROC.2019.3.03","DOIUrl":"https://doi.org/10.3176/PROC.2019.3.03","url":null,"abstract":"","PeriodicalId":54577,"journal":{"name":"Proceedings of the Estonian Academy of Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3176/PROC.2019.3.03","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69930141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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