Pub Date : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949966
A. Fokeev, Bullat Subgatullin, Yossef Ahmed
The disadvantages of the existing formalized methods of electrical loads calculation and selection of electrical equipment are considered. The application practice of methods for assessing the higher harmonic components influence on power electrical equipment is given. An approach for electrical loads calculation and selection of electrical equipment using well-known theoretical principles and methods for estimating the effect of higher harmonics on electrical equipment is proposed. At electric load calculation it's proposed to use the concept: power factor, displacement power factor and distortion power. Additionally at selection of electrical power equipment it's proposed to use the concept: derating factor for power transformers and correction coefficient for power cables.
{"title":"Methods of electrical loads calculation and selection of electrical power equipment","authors":"A. Fokeev, Bullat Subgatullin, Yossef Ahmed","doi":"10.1109/ICOECS46375.2019.8949966","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949966","url":null,"abstract":"The disadvantages of the existing formalized methods of electrical loads calculation and selection of electrical equipment are considered. The application practice of methods for assessing the higher harmonic components influence on power electrical equipment is given. An approach for electrical loads calculation and selection of electrical equipment using well-known theoretical principles and methods for estimating the effect of higher harmonics on electrical equipment is proposed. At electric load calculation it's proposed to use the concept: power factor, displacement power factor and distortion power. Additionally at selection of electrical power equipment it's proposed to use the concept: derating factor for power transformers and correction coefficient for power cables.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"10 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130392391","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949992
V. Vavilova
This paper is devoted to the study of the possibilities of using the orbital angular momentum in radio communication systems to increase the number of transmitted independent channels on a single frequency. The analytical calculation of the angular distribution of the multipole radiation for electric fields of the electric type and the calculation of the power of the multipole radiation were carried out. Radio channels were transmitted using an orbital angular momentum using computer simulation of multi-field radiation located along a circle, which in turn confirmed the results of analytical calculations. A study conducted in the work confirms the possibility of using multiplexing along the orbital angular momentum in radio communication systems.
{"title":"The Possibility of Using the Orbital Angular Momentum in Radio Communication Systems","authors":"V. Vavilova","doi":"10.1109/ICOECS46375.2019.8949992","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949992","url":null,"abstract":"This paper is devoted to the study of the possibilities of using the orbital angular momentum in radio communication systems to increase the number of transmitted independent channels on a single frequency. The analytical calculation of the angular distribution of the multipole radiation for electric fields of the electric type and the calculation of the power of the multipole radiation were carried out. Radio channels were transmitted using an orbital angular momentum using computer simulation of multi-field radiation located along a circle, which in turn confirmed the results of analytical calculations. A study conducted in the work confirms the possibility of using multiplexing along the orbital angular momentum in radio communication systems.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"41 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129180759","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8950015
F. Ismagilov, G. Kulikov, V. Vavilov, V. Ayguzina
This paper presents a model describing the primary magnetic field in the air gap of electromechanical energy converters with high-coercivity permanent magnets for aircrafts. It was obtained by using solutions of the Laplace partial differential equations in Cartesian coordinates. The verification method of this analytical model is presented and different software packages were used. The discrepancy between the solutions is in their two-dimensional and three-dimensional formulation in Cartesian and cylindrical coordinates is revealed. It is shown that the proposed analytical three-dimensional model is an effective interdisciplinary tool for the design of electromechanical energy converters with high-coercivity permanent magnets.
{"title":"Improving the quality of designing electromechanical energy converters for aircrafts by using a system-analytical modeling with the application of intelligent information technologies","authors":"F. Ismagilov, G. Kulikov, V. Vavilov, V. Ayguzina","doi":"10.1109/ICOECS46375.2019.8950015","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8950015","url":null,"abstract":"This paper presents a model describing the primary magnetic field in the air gap of electromechanical energy converters with high-coercivity permanent magnets for aircrafts. It was obtained by using solutions of the Laplace partial differential equations in Cartesian coordinates. The verification method of this analytical model is presented and different software packages were used. The discrepancy between the solutions is in their two-dimensional and three-dimensional formulation in Cartesian and cylindrical coordinates is revealed. It is shown that the proposed analytical three-dimensional model is an effective interdisciplinary tool for the design of electromechanical energy converters with high-coercivity permanent magnets.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129962367","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949954
I. Kirpichnikova, I. B. Makhsumov
This article provides a calculation of the gross technical and economic potential of solar energy from the Penjikent district in order to determine the possibility of using it to obtain and provide electrical and thermal energy. The results of the calculation of solar energy resources for the Penjikent district of the Republic of Tajikistan, obtained on the basis of using NASA metrological data for the last 20 years, are presented. Using data from NASA and the RETScreen Expert computer program, the work also determined the average monthly solar radiation intake for 22 years for all cities of Tajikistan and is given in the table. The conclusion was made about the expediency of using solar photovoltaic modules in the territory of the Penjikent district, where there is still no electricity in most areas of this region.
{"title":"Calculation of gross, technical and economic potential of solar energy of the Republic of Tajikistan","authors":"I. Kirpichnikova, I. B. Makhsumov","doi":"10.1109/ICOECS46375.2019.8949954","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949954","url":null,"abstract":"This article provides a calculation of the gross technical and economic potential of solar energy from the Penjikent district in order to determine the possibility of using it to obtain and provide electrical and thermal energy. The results of the calculation of solar energy resources for the Penjikent district of the Republic of Tajikistan, obtained on the basis of using NASA metrological data for the last 20 years, are presented. Using data from NASA and the RETScreen Expert computer program, the work also determined the average monthly solar radiation intake for 22 years for all cities of Tajikistan and is given in the table. The conclusion was made about the expediency of using solar photovoltaic modules in the territory of the Penjikent district, where there is still no electricity in most areas of this region.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129606380","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949969
Z. Sukhinets, N. Prokopenko, A. I. Gulin, A. N. Krasnov, O. Dvornikov, A. L. Galiev
The paper analyses latest research in developing methods to measure high temperatures of gases. The calculation methodology of shape memory effect for the necessary frequency range using transformation functions. Sheet-oriented solutions and some results of the testing are presented.
{"title":"Dynamic temperature measurement of GTE gases with interference elimination","authors":"Z. Sukhinets, N. Prokopenko, A. I. Gulin, A. N. Krasnov, O. Dvornikov, A. L. Galiev","doi":"10.1109/ICOECS46375.2019.8949969","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949969","url":null,"abstract":"The paper analyses latest research in developing methods to measure high temperatures of gases. The calculation methodology of shape memory effect for the necessary frequency range using transformation functions. Sheet-oriented solutions and some results of the testing are presented.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124033742","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949882
Shilin Aleksandr Nikolaevich, Koptelova Irina Aleksandrovna, Kuznetsova Nadezhda Sergeevna
In connection with the introduction of computer technology into the educational process, the need arises to develop numerical simulation methods. This is especially relevant in technical colleges when studying the dynamic properties of technical systems described by high-order differential equations. To solve such problems, even before the introduction of computer technology, various graphical methods of engineering calculation and analysis were developed, but these methods are cumbersome and inaccurate. At present, due to the widespread introduction of digital substations in the power industry, there is a need for digital modeling of electrical and electronic devices. The basic mathematical model of electromechanical and electronic devices is their equivalent circuit. Therefore, for the convenience of modeling electrical circuits, an operator-discrete method has been developed that allows one to obtain difference equations directly according to the circuit. This method can be used in the modernization of analog control systems, since it makes it possible to obtain digital filter circuits or digital signal processing algorithms on universal computers using electrical circuits of analog regulators. On the basis of the conducted research of modeling methods, conclusions for practical calculations are obtained.
{"title":"Digital modeling of electrical and electronic devices","authors":"Shilin Aleksandr Nikolaevich, Koptelova Irina Aleksandrovna, Kuznetsova Nadezhda Sergeevna","doi":"10.1109/ICOECS46375.2019.8949882","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949882","url":null,"abstract":"In connection with the introduction of computer technology into the educational process, the need arises to develop numerical simulation methods. This is especially relevant in technical colleges when studying the dynamic properties of technical systems described by high-order differential equations. To solve such problems, even before the introduction of computer technology, various graphical methods of engineering calculation and analysis were developed, but these methods are cumbersome and inaccurate. At present, due to the widespread introduction of digital substations in the power industry, there is a need for digital modeling of electrical and electronic devices. The basic mathematical model of electromechanical and electronic devices is their equivalent circuit. Therefore, for the convenience of modeling electrical circuits, an operator-discrete method has been developed that allows one to obtain difference equations directly according to the circuit. This method can be used in the modernization of analog control systems, since it makes it possible to obtain digital filter circuits or digital signal processing algorithms on universal computers using electrical circuits of analog regulators. On the basis of the conducted research of modeling methods, conclusions for practical calculations are obtained.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123074739","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949980
M. Sitnikov, Yurij I. Sepp
In modern literature, little attention is paid to contact connections, as well as to an analysis of their condition. At the same time, contact connections can induce additional current harmonics, which depend on the state of the contact. When contact is affected by any vibration, then due to nonlinear dependence of transitional contact resistance on the magnitude of the contact-compressing force, the harmonic composition of currents flowing through a contact connection changes. It is known that additional harmonics in the electrical network lead to additional heat losses, as well as to overheating in the insulation of the windings of electrical machines. In the electric power system, the most frequent consumers are AC motors, therefore, the numerical effect of this nonlinearity on the parameters of a three-phase induction motor is estimated.
{"title":"Influence of Contact Connection's Vibration on Induction Motor's Parameters under During Start-up","authors":"M. Sitnikov, Yurij I. Sepp","doi":"10.1109/ICOECS46375.2019.8949980","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949980","url":null,"abstract":"In modern literature, little attention is paid to contact connections, as well as to an analysis of their condition. At the same time, contact connections can induce additional current harmonics, which depend on the state of the contact. When contact is affected by any vibration, then due to nonlinear dependence of transitional contact resistance on the magnitude of the contact-compressing force, the harmonic composition of currents flowing through a contact connection changes. It is known that additional harmonics in the electrical network lead to additional heat losses, as well as to overheating in the insulation of the windings of electrical machines. In the electric power system, the most frequent consumers are AC motors, therefore, the numerical effect of this nonlinearity on the parameters of a three-phase induction motor is estimated.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115713681","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}
One of the problems of the oil industry is the significant amount of water in the oil-containing fluid being extracted from wells. For some fields, the indicator of water content reaches 75–77%. The content of salts, water, and mechanical impurities in the oil, has a negative impact on the operation of the equipment of oil refineries. In the paper we propose an original design of dehydrator, containing systems of oppositely charged electrodes located between magnetization coils of alternating electric current. In the design the separation of the oil-water emulsion additionally occurs due to the crossed forces of the electric and magnetic fields. For the dehydrator design under consideration mathematical modeling was performed with aim of investigation and simulation of water droplets movement under the action of the electric and magnetic fields existing inside the dehydrator. As the result of the numerical simulation of the dehydration process in the design under consideration shows, applying of crossed electric and magnetic fields leads to a significant increase in the probability of collisions of water droplets, accelerates their growth and sedimentation velocity by gravity, that allows to raise the dehydrator productivity in the comparison with the cases of using only an electric or only magnetic field. Given design of dehydrator can be used in the gas and oil industry.
{"title":"Magnetoelectrodehydrator","authors":"Khajrullin Irek Khanifovich, Maksudov Denis Vilevich, Yangirov Ilgiz Flusovich, Okhotnikov Mikhail Valerievich","doi":"10.1109/ICOECS46375.2019.8950018","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8950018","url":null,"abstract":"One of the problems of the oil industry is the significant amount of water in the oil-containing fluid being extracted from wells. For some fields, the indicator of water content reaches 75–77%. The content of salts, water, and mechanical impurities in the oil, has a negative impact on the operation of the equipment of oil refineries. In the paper we propose an original design of dehydrator, containing systems of oppositely charged electrodes located between magnetization coils of alternating electric current. In the design the separation of the oil-water emulsion additionally occurs due to the crossed forces of the electric and magnetic fields. For the dehydrator design under consideration mathematical modeling was performed with aim of investigation and simulation of water droplets movement under the action of the electric and magnetic fields existing inside the dehydrator. As the result of the numerical simulation of the dehydration process in the design under consideration shows, applying of crossed electric and magnetic fields leads to a significant increase in the probability of collisions of water droplets, accelerates their growth and sedimentation velocity by gravity, that allows to raise the dehydrator productivity in the comparison with the cases of using only an electric or only magnetic field. Given design of dehydrator can be used in the gas and oil industry.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130837438","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949965
Oleg Khasanov, Z. Khasanov, N. Khasanova
The problem of adaptive-coordinated control of a robotic technological complex of plasma coating is discussed. The possibilities of application of adaptive control algorithms for acceleration and braking of actuating mechanisms of electric drives under conditions of incomplete a priori information are given. To improve the quality of motion control of interconnected electric drives, it is proposed to use a linearized dynamic model for each localized section of the trajectory, the characteristics of which are detailed by means of robust-adaptive control during operation. The simulation is carried out taking into account the dynamic characteristics of the multi-connected electric drives of the robotic complex.
{"title":"The modeling of multicircuit control systems in robotized technological complex","authors":"Oleg Khasanov, Z. Khasanov, N. Khasanova","doi":"10.1109/ICOECS46375.2019.8949965","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949965","url":null,"abstract":"The problem of adaptive-coordinated control of a robotic technological complex of plasma coating is discussed. The possibilities of application of adaptive control algorithms for acceleration and braking of actuating mechanisms of electric drives under conditions of incomplete a priori information are given. To improve the quality of motion control of interconnected electric drives, it is proposed to use a linearized dynamic model for each localized section of the trajectory, the characteristics of which are detailed by means of robust-adaptive control during operation. The simulation is carried out taking into account the dynamic characteristics of the multi-connected electric drives of the robotic complex.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131240491","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949945
G. Kornilov, T. Khramshin, I. R. Abdulveleev
Modern adjustable electric drives of rolling mills are commonly manufactured on AC with a two-link frequency converter. Stable operation of electric drives with active front ends can be provided at fulfilling certain requirements to supply voltage quality. In the systems of plant power supply at single grid-to-ground faults in the grid 110-220 kV one can observe unbalanced voltage sags in the grid 10 kV. At occurrence of unbalanced voltage sags the conditions for negative sequence over-current flow on the part of active front ends are generated. Negative sequence over-current occurrence leads to the active front end disconnection and violation of an operating cycle. Such situations are especially inadmissible at electric drive power supply of continuous production to which continuous rolling mills also relate. The problem of increasing the stability of active front ends can be provided due to circuit designs as well as by adapting the systems of active front end control. The article considers methods for improving the stability of active front ends to unbalanced voltage sags due to control system upgrade. The authors analyze control systems with feedforward control on negative phase-sequence voltage and grid voltage correction. The simulation results demonstrated that critical values limits capable of causing converter disconnection - grid current and voltage fluctuation in the DC link - don't exceed permissible values in case one applies the control system with correction on the grid voltage and a filter of sliding average with a finite impulse response.
{"title":"Increasing stability of electric drives of rolling mills with active front ends at voltage sag","authors":"G. Kornilov, T. Khramshin, I. R. Abdulveleev","doi":"10.1109/ICOECS46375.2019.8949945","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949945","url":null,"abstract":"Modern adjustable electric drives of rolling mills are commonly manufactured on AC with a two-link frequency converter. Stable operation of electric drives with active front ends can be provided at fulfilling certain requirements to supply voltage quality. In the systems of plant power supply at single grid-to-ground faults in the grid 110-220 kV one can observe unbalanced voltage sags in the grid 10 kV. At occurrence of unbalanced voltage sags the conditions for negative sequence over-current flow on the part of active front ends are generated. Negative sequence over-current occurrence leads to the active front end disconnection and violation of an operating cycle. Such situations are especially inadmissible at electric drive power supply of continuous production to which continuous rolling mills also relate. The problem of increasing the stability of active front ends can be provided due to circuit designs as well as by adapting the systems of active front end control. The article considers methods for improving the stability of active front ends to unbalanced voltage sags due to control system upgrade. The authors analyze control systems with feedforward control on negative phase-sequence voltage and grid voltage correction. The simulation results demonstrated that critical values limits capable of causing converter disconnection - grid current and voltage fluctuation in the DC link - don't exceed permissible values in case one applies the control system with correction on the grid voltage and a filter of sliding average with a finite impulse response.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114868150","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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