Pub Date : 2021-11-19DOI: 10.1109/apeie52976.2021.9647581
E. Erushin, N. Kostyukova, B. Nyushkov, A. Boyko, A. Y. Kiryakova, D. Kolker
The authors present advanced experimental methods of spectral narrowing in optical parametric oscillators. One of the studied approaches relies on the use of a volume Bragg grating in the resonators of optical parametric generators. The other approaches are based on injection seeding techniques employing different seed lasers (namely, a narrow-linewidth He-Ne laser and a tunable diode laser). Both methods demonstrated significant narrowing of the spectral line. Using the volume Bragg grating, it was possible to reduce the width of the optical parametric generator line from 180 nm to 640 pm, and the tuning range was 67 nm. The output power of this configuration was 689 mW at 5 kHz and pulse duration 8 ns. The injection seeding was carried out at an idler wave (He-Ne laser at $3.39 mu mathrm{m}$) and at a signal wave (diode laser at $1.538div 1.544, mumathrm{m}$). In both cases, the linewidth after seeding was approximately the same and amounted about 0.5 nm.
{"title":"Spectral Narrowing Techniques for Optical Parametric Oscillators at Near and Mid-IR Region","authors":"E. Erushin, N. Kostyukova, B. Nyushkov, A. Boyko, A. Y. Kiryakova, D. Kolker","doi":"10.1109/apeie52976.2021.9647581","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647581","url":null,"abstract":"The authors present advanced experimental methods of spectral narrowing in optical parametric oscillators. One of the studied approaches relies on the use of a volume Bragg grating in the resonators of optical parametric generators. The other approaches are based on injection seeding techniques employing different seed lasers (namely, a narrow-linewidth He-Ne laser and a tunable diode laser). Both methods demonstrated significant narrowing of the spectral line. Using the volume Bragg grating, it was possible to reduce the width of the optical parametric generator line from 180 nm to 640 pm, and the tuning range was 67 nm. The output power of this configuration was 689 mW at 5 kHz and pulse duration 8 ns. The injection seeding was carried out at an idler wave (He-Ne laser at $3.39 mu mathrm{m}$) and at a signal wave (diode laser at $1.538div 1.544, mumathrm{m}$). In both cases, the linewidth after seeding was approximately the same and amounted about 0.5 nm.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124050955","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647604
A. Chugunov, N. Petukhov, A. Malyshev, V. Pudlovskiy, O. Glukhov, A. Frolov
Currently provision of reliable PNT information in GNSS-challenged conditions is remaining a difficult task because of several factors which have a significant impact on signal propagation and its steady and proper reception such as multipath, attenuation or blockage of the GNSS LOS signal, interference by wide class of signals in GNSS frequency band. To improve the reliability of PNT information in outdoor urban environments, it is proposed to use UWB LNS due to low multipath effect on its signals. For this reason, the main purpose of this work is evaluation of the features of constructing LNS based on UWB signals in urban conditions, as well as comparison of error of navigation solution and plane coordinates based on GNSS and UWB signals. Two experiments described in this paper were conducted. The first experiment was aimed at determining the maximum operating range of UWB LNS, the second experiment was focused on evaluation of UWB LNS performance in outdoor urban environments. In conclusion discussion of obtained results is presented.
{"title":"Experimental Evaluation of UWB Local Navigation System Performance Used for Pedestrian and Vehicle Positioning in Outdoor Urban Environments","authors":"A. Chugunov, N. Petukhov, A. Malyshev, V. Pudlovskiy, O. Glukhov, A. Frolov","doi":"10.1109/apeie52976.2021.9647604","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647604","url":null,"abstract":"Currently provision of reliable PNT information in GNSS-challenged conditions is remaining a difficult task because of several factors which have a significant impact on signal propagation and its steady and proper reception such as multipath, attenuation or blockage of the GNSS LOS signal, interference by wide class of signals in GNSS frequency band. To improve the reliability of PNT information in outdoor urban environments, it is proposed to use UWB LNS due to low multipath effect on its signals. For this reason, the main purpose of this work is evaluation of the features of constructing LNS based on UWB signals in urban conditions, as well as comparison of error of navigation solution and plane coordinates based on GNSS and UWB signals. Two experiments described in this paper were conducted. The first experiment was aimed at determining the maximum operating range of UWB LNS, the second experiment was focused on evaluation of UWB LNS performance in outdoor urban environments. In conclusion discussion of obtained results is presented.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126266292","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647644
A. A. Velichko, N. I. Filimonova, V. Ilyushin, Alexei Yu. Krupin, I. E. Rudenko
In this work the parameters of the strain gauges made on the “silicon on insulator” structures are investigated. Industrial silicon-on-sapphire structures and the Si/CaF2/Si (100) structures, obtained by molecular beam epitaxy, as a substrate were used. The piezoresistors were created by the ion implantation of the boron ions with the equal process conditions: volume concentration, accelerating voltage, topological layout and geometric dimensions. The rapid thermal annealing were used to eliminate radiation defects and to activate impurity atoms in the epitaxial silicon layer of both structures. It was found that resistance stabilization of the epitaxial silicon layer in the Si/CaF2/Si structures took significantly less time than in the silicon-on-sapphire structures, which indicates a higher structural perfection of the epitaxial silicon layers on the CaF2 / Si substrate. The piezoresistors formed on the Si/CaF2/Si structures had the same sensitivity as the piezoresistors based on the silicon-on-sapphire structures. The experimental dependences of the resistance on the applied load are linear and in a quality manner coincide with the calculated dependences. With the same parameters of the piezoresistors, quality of Si layers on the CaF2/Si substrate is higher, and their cost is significantly lower than the silicon-on-sapphire structures. It is important to note that, despite the lower sensitivity compared to the piezoresistors based on the monolithic silicon, the piezoresistors based on the SOI structures have a higher working temperature and radiation resistance.
{"title":"The Strain Gauges on the SOI Structures","authors":"A. A. Velichko, N. I. Filimonova, V. Ilyushin, Alexei Yu. Krupin, I. E. Rudenko","doi":"10.1109/apeie52976.2021.9647644","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647644","url":null,"abstract":"In this work the parameters of the strain gauges made on the “silicon on insulator” structures are investigated. Industrial silicon-on-sapphire structures and the Si/CaF2/Si (100) structures, obtained by molecular beam epitaxy, as a substrate were used. The piezoresistors were created by the ion implantation of the boron ions with the equal process conditions: volume concentration, accelerating voltage, topological layout and geometric dimensions. The rapid thermal annealing were used to eliminate radiation defects and to activate impurity atoms in the epitaxial silicon layer of both structures. It was found that resistance stabilization of the epitaxial silicon layer in the Si/CaF2/Si structures took significantly less time than in the silicon-on-sapphire structures, which indicates a higher structural perfection of the epitaxial silicon layers on the CaF2 / Si substrate. The piezoresistors formed on the Si/CaF2/Si structures had the same sensitivity as the piezoresistors based on the silicon-on-sapphire structures. The experimental dependences of the resistance on the applied load are linear and in a quality manner coincide with the calculated dependences. With the same parameters of the piezoresistors, quality of Si layers on the CaF2/Si substrate is higher, and their cost is significantly lower than the silicon-on-sapphire structures. It is important to note that, despite the lower sensitivity compared to the piezoresistors based on the monolithic silicon, the piezoresistors based on the SOI structures have a higher working temperature and radiation resistance.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125596177","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647691
Nikolay V. Nurlatov
The work examines the power supply system for autonomous infrastructure facilities. A circuit of an energy-efficient cascade DC voltage converter based on resonance structures with switching capacitors is considered. The primary source of electrical energy is a low-voltage storage battery, the voltage on which varies in the range of 16–25 V. An adjustable output cascade used in converter stabilizes the voltage across the load when the input voltage changes. Load power 3.5 kW. Mild wiring technology allows reducing dynamic power losses in power semiconductor switches and levels down the electromagnetic interference. Expressions for calculating the parameters of the reactive elements of the cascade converter are given. The elements were calculated and simulated in the PSIM environment. For a comparative assessment of weight-size parameters, a diagram of a resonance structures-based step-up converter with switching capacitors is shown. The weight-size indicators of the converters have been calculated. The number of semiconductor elements in a cascade converter is 2.8 times smaller than in a boost converter.
{"title":"Resonance Structure-based DC Voltage Variable Cascade Converter with Switching Capacitors","authors":"Nikolay V. Nurlatov","doi":"10.1109/apeie52976.2021.9647691","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647691","url":null,"abstract":"The work examines the power supply system for autonomous infrastructure facilities. A circuit of an energy-efficient cascade DC voltage converter based on resonance structures with switching capacitors is considered. The primary source of electrical energy is a low-voltage storage battery, the voltage on which varies in the range of 16–25 V. An adjustable output cascade used in converter stabilizes the voltage across the load when the input voltage changes. Load power 3.5 kW. Mild wiring technology allows reducing dynamic power losses in power semiconductor switches and levels down the electromagnetic interference. Expressions for calculating the parameters of the reactive elements of the cascade converter are given. The elements were calculated and simulated in the PSIM environment. For a comparative assessment of weight-size parameters, a diagram of a resonance structures-based step-up converter with switching capacitors is shown. The weight-size indicators of the converters have been calculated. The number of semiconductor elements in a cascade converter is 2.8 times smaller than in a boost converter.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121857565","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647467
A. Kapitanov, S. Egorov, V. Meshkov
The article considers the solution of one of the main tasks of modern mechanical engineering which is the modeling of modern production systems in the field of engineering. The choice of type of production system model is considered. It is shown that from the systematological point of view all existing models are divided into imitation (portrait) and optimization, and the problem of production systems designing belongs to the class of weakly structured problems. Consequently, at the stage of macro-design it is advisable to use optimizing models rather than imitation models. An expanded definition of technological process as a set of production design, technological process design of the sequence of form-building products, manufacturing is given. The concept of production flexibility and production system adaptation to changing conditions is defined. These solutions can be used both in production automation, and in the development of computer-aided design and modeling systems, flexible production systems, and also fully meet the goals and objectives of procedia engineering.
{"title":"The Features of Production Systems Modeling","authors":"A. Kapitanov, S. Egorov, V. Meshkov","doi":"10.1109/apeie52976.2021.9647467","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647467","url":null,"abstract":"The article considers the solution of one of the main tasks of modern mechanical engineering which is the modeling of modern production systems in the field of engineering. The choice of type of production system model is considered. It is shown that from the systematological point of view all existing models are divided into imitation (portrait) and optimization, and the problem of production systems designing belongs to the class of weakly structured problems. Consequently, at the stage of macro-design it is advisable to use optimizing models rather than imitation models. An expanded definition of technological process as a set of production design, technological process design of the sequence of form-building products, manufacturing is given. The concept of production flexibility and production system adaptation to changing conditions is defined. These solutions can be used both in production automation, and in the development of computer-aided design and modeling systems, flexible production systems, and also fully meet the goals and objectives of procedia engineering.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115851761","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647679
Zagdkhorol Bayasgalan, Tsetsaee Bayasgalan, W. Hardt, I. Reva
This paper presents possibilities to improve flexibility for integrated energy systems using optimization techniques in a capacity market. Long-term planning of the energy system is considered. Meeting the rapidly growing demand for electricity requires a complete integrated power system solution that must support consumers, stakeholders, and regional operations. The rapid change in the global economy is creating an energy transition towards the strategic future of power systems and energy markets - a new era of flexible grids, or the era of energy flexibility. The proposed capacity market model improves the competitiveness of the energy market system in accordance with the assessment and flexibility of electricity security. It also presents recommendations for evaluating the dimensions of the integrated energy system. All participants in the energy market can accept it as a useful tool to support decision-making and increase the sustainability of the energy system. The smart grids provide the reliability of power supply in an increasingly complex operating environment, achieved through observability, digitalization, and an increase in the number of measurements. Power supply and grid companies remain the main drivers of change.
{"title":"Improvement of Flexibility in the Integrated Energy Systems","authors":"Zagdkhorol Bayasgalan, Tsetsaee Bayasgalan, W. Hardt, I. Reva","doi":"10.1109/apeie52976.2021.9647679","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647679","url":null,"abstract":"This paper presents possibilities to improve flexibility for integrated energy systems using optimization techniques in a capacity market. Long-term planning of the energy system is considered. Meeting the rapidly growing demand for electricity requires a complete integrated power system solution that must support consumers, stakeholders, and regional operations. The rapid change in the global economy is creating an energy transition towards the strategic future of power systems and energy markets - a new era of flexible grids, or the era of energy flexibility. The proposed capacity market model improves the competitiveness of the energy market system in accordance with the assessment and flexibility of electricity security. It also presents recommendations for evaluating the dimensions of the integrated energy system. All participants in the energy market can accept it as a useful tool to support decision-making and increase the sustainability of the energy system. The smart grids provide the reliability of power supply in an increasingly complex operating environment, achieved through observability, digitalization, and an increase in the number of measurements. Power supply and grid companies remain the main drivers of change.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132400785","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647640
A. G. Borodinov, V. Manoilov, I. V. Zarutskiy, A. Petrov, V. Kurochkin
Counting the occurrence of different k-mers often arises in problems of genome assembly. Analysis of the frequency distribution of k-mers makes it possible to find assembly errors in already formed contigs. Currently, in connection with the development of instrumentation for genetic analysis, there is an urgent need to develop methods for assessing the quality of genomic assembly. Such techniques will make it possible to assess the reliability of genetic analysis in existing and newly developed devices. In this work, based on the analysis of various software tools, programs are selected that allow assessing the quality of genomic assembly in parallel sequencing sequencers. Using the selected programs, the data obtained on the domestic sequencer for parallel sequencing Nanofor SPS were processed. Based on the results of processing these data, the quality of the genomic assembly was assessed by the method of k-mers analysis and recommendations for improving the hardware and software of the Nanofor SPS device were given.
{"title":"Methodology for Assessing the Quality of Genomic Assembly Based on the Analysis of K-Mers Frequency in a Parallel Sequencing Sequencer","authors":"A. G. Borodinov, V. Manoilov, I. V. Zarutskiy, A. Petrov, V. Kurochkin","doi":"10.1109/apeie52976.2021.9647640","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647640","url":null,"abstract":"Counting the occurrence of different k-mers often arises in problems of genome assembly. Analysis of the frequency distribution of k-mers makes it possible to find assembly errors in already formed contigs. Currently, in connection with the development of instrumentation for genetic analysis, there is an urgent need to develop methods for assessing the quality of genomic assembly. Such techniques will make it possible to assess the reliability of genetic analysis in existing and newly developed devices. In this work, based on the analysis of various software tools, programs are selected that allow assessing the quality of genomic assembly in parallel sequencing sequencers. Using the selected programs, the data obtained on the domestic sequencer for parallel sequencing Nanofor SPS were processed. Based on the results of processing these data, the quality of the genomic assembly was assessed by the method of k-mers analysis and recommendations for improving the hardware and software of the Nanofor SPS device were given.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130929953","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647528
A. Zemlyanov, G. Matvienko
The results of complex studies of propagation of a wide (5 cm diameter) femtosecond laser beam generated by a titanium-sapphire laser (wavelength 0.78 $mumathrm{m}$, peak pulse power 1 TW) are discussed. Both the location of the domain where filamentation occurs and its structure were changed by introducing controlled distortions of the wave phase at the expense of a multi-element deformable mirror. The advantages of using this mirror (compared to spherical lenses and mirrors) for laser radiation focusing are demonstrated. Focusing femtosecond laser radiation with a bimorph deformable mirror allows the filamentation region to be moved along the entire path and does not (significantly) decrease its length. The spatial position of the high-intensity light channels formed in the laser beam can be configured. The existence of a regime of radiation propagation without ionization is shown, in which ordered sets of high-intensity (1011–1012 W/cm2) weakly diverging (less than 0.01 mrad) light channels are formed. These channels are characterized by a millimeter diameter and large spatial extent (over 100 m).
{"title":"Propagation of Femtosecond Radiation in Air and the Formation of Subdiffraction Divergence Beams","authors":"A. Zemlyanov, G. Matvienko","doi":"10.1109/apeie52976.2021.9647528","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647528","url":null,"abstract":"The results of complex studies of propagation of a wide (5 cm diameter) femtosecond laser beam generated by a titanium-sapphire laser (wavelength 0.78 $mumathrm{m}$, peak pulse power 1 TW) are discussed. Both the location of the domain where filamentation occurs and its structure were changed by introducing controlled distortions of the wave phase at the expense of a multi-element deformable mirror. The advantages of using this mirror (compared to spherical lenses and mirrors) for laser radiation focusing are demonstrated. Focusing femtosecond laser radiation with a bimorph deformable mirror allows the filamentation region to be moved along the entire path and does not (significantly) decrease its length. The spatial position of the high-intensity light channels formed in the laser beam can be configured. The existence of a regime of radiation propagation without ionization is shown, in which ordered sets of high-intensity (1011–1012 W/cm2) weakly diverging (less than 0.01 mrad) light channels are formed. These channels are characterized by a millimeter diameter and large spatial extent (over 100 m).","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131874160","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647605
Rinat G. Gorokhovsky, S. Polosatkin
A gamma-ray attenuation method is an effective way for measurement of fraction content in oil/water mix in the petroleum industry. In particular, it is successfully applied for measurements of oil content of three-phase flux (oil/water/gas) in flowmeters of producing oil and gas wells. Another application of gamma densitometry is a direct measurement of dynamics of saturation of rock core samples in experimental studies of multiphase fluid filtration. Nonetheless, a realization of such measurement has a fundamental limitation associated with the large absorption of radiation in the core material and a weak dependence of attenuation on the composition of the fluid. The objectives of this work are to determine the optimal energies of gamma rays and to evaluate the time need for collecting sufficient statistics required to measure oil and water concentrations in the core. Based on the analysis of statistical errors, the optimal energy was found for one (“low energy”) of the two spectral lines used for the radiography of 40 keV. The energy of the second spectral line should be within the range of 80–300 keV. For reasonable parameters of gamma-ray source and geometry of the system, oil content measurement accuracy of 1% can be reached in 100 seconds.
{"title":"Assessment of the Applicability Gamma Ray Attenuation Method for Measurement of Three-PhasePermeability of Core Samples","authors":"Rinat G. Gorokhovsky, S. Polosatkin","doi":"10.1109/apeie52976.2021.9647605","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647605","url":null,"abstract":"A gamma-ray attenuation method is an effective way for measurement of fraction content in oil/water mix in the petroleum industry. In particular, it is successfully applied for measurements of oil content of three-phase flux (oil/water/gas) in flowmeters of producing oil and gas wells. Another application of gamma densitometry is a direct measurement of dynamics of saturation of rock core samples in experimental studies of multiphase fluid filtration. Nonetheless, a realization of such measurement has a fundamental limitation associated with the large absorption of radiation in the core material and a weak dependence of attenuation on the composition of the fluid. The objectives of this work are to determine the optimal energies of gamma rays and to evaluate the time need for collecting sufficient statistics required to measure oil and water concentrations in the core. Based on the analysis of statistical errors, the optimal energy was found for one (“low energy”) of the two spectral lines used for the radiography of 40 keV. The energy of the second spectral line should be within the range of 80–300 keV. For reasonable parameters of gamma-ray source and geometry of the system, oil content measurement accuracy of 1% can be reached in 100 seconds.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116421825","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 : 2021-11-19DOI: 10.1109/apeie52976.2021.9647633
Anastasiya V. Garenskaya, M. Bakaev, O. Razumnikova
The need to assign a particular human subject to a certain group arises in many tasks related to measurement of cognitive abilities or their application in interaction tasks. Analysis of frequencies in electroencephalograms is one of the useful approaches for the differentiation, but there is no agreed-upon method due to different frequency bands associated with various cognitive functions and personality traits. In a pilot study described in the paper, two obviously different groups of EEG signals for 26 subjects are employed: recorded with the subjects’ eyes open and the eyes closed. Brain activity maps in WinEEG are produced and 3 alternative algorithms are used to calculate pairwise image similarities for the maps per three groups: EO-EO, EC-EC, and EC-EO. The differences between all the groups are statistically significant, and the proposed “coarsening” approach towards EEG classification can easily yield accuracy of 81.25%. Its potential benefits include no need for advanced brain electric activity registration equipment and no reliance on sophisticated analysis methods that are not entirely resilient to noise in the EEG signals.
{"title":"Telling Minds Apart: Classification of EEG Signals Based on Comparison of Brain Activity Maps","authors":"Anastasiya V. Garenskaya, M. Bakaev, O. Razumnikova","doi":"10.1109/apeie52976.2021.9647633","DOIUrl":"https://doi.org/10.1109/apeie52976.2021.9647633","url":null,"abstract":"The need to assign a particular human subject to a certain group arises in many tasks related to measurement of cognitive abilities or their application in interaction tasks. Analysis of frequencies in electroencephalograms is one of the useful approaches for the differentiation, but there is no agreed-upon method due to different frequency bands associated with various cognitive functions and personality traits. In a pilot study described in the paper, two obviously different groups of EEG signals for 26 subjects are employed: recorded with the subjects’ eyes open and the eyes closed. Brain activity maps in WinEEG are produced and 3 alternative algorithms are used to calculate pairwise image similarities for the maps per three groups: EO-EO, EC-EC, and EC-EO. The differences between all the groups are statistically significant, and the proposed “coarsening” approach towards EEG classification can easily yield accuracy of 81.25%. Its potential benefits include no need for advanced brain electric activity registration equipment and no reliance on sophisticated analysis methods that are not entirely resilient to noise in the EEG signals.","PeriodicalId":272064,"journal":{"name":"2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116873340","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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