Pub Date : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263130
O. Dovgalyuk, R. Bondarenko, I. Yakovenko, E. Dyakov, Tatyana Syromyatnikova
Constructive implementation and functioning peculiarities of existing autonomous lighting complexes for Ukraine highways, which use renewable energy sources and energy storage systems in their work, are analyzed. The shortcomings in the investigated autonomous lighting complexes work the are revealed on the conducted analysis basis and the reasons for their occurrence are investigated. Measures to efficiency increase of autonomous lighting complexes operation for highways, which provide the opportunity to use the ready-made modern technical means, proposed. The need to take into account the actual climatic and technical conditions of devices operation to ensure the stable and reliable functioning of autonomous lighting complexes for highways is justified.
{"title":"Efficiency Increase of Autonomous Lighting Complexes Operation for Ukraine Highways","authors":"O. Dovgalyuk, R. Bondarenko, I. Yakovenko, E. Dyakov, Tatyana Syromyatnikova","doi":"10.1109/IEPS51250.2020.9263130","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263130","url":null,"abstract":"Constructive implementation and functioning peculiarities of existing autonomous lighting complexes for Ukraine highways, which use renewable energy sources and energy storage systems in their work, are analyzed. The shortcomings in the investigated autonomous lighting complexes work the are revealed on the conducted analysis basis and the reasons for their occurrence are investigated. Measures to efficiency increase of autonomous lighting complexes operation for highways, which provide the opportunity to use the ready-made modern technical means, proposed. The need to take into account the actual climatic and technical conditions of devices operation to ensure the stable and reliable functioning of autonomous lighting complexes for highways is justified.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122099869","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263195
G. Pavlov, M. Pokrovskiy, I. Vinnichenko, D. Vinnichenko, I. Zhuk
The energy parameters of the serial-to-serial resonant converter for wireless power transfer are analyzed. The expressions for determining static and dynamic losses of the resonant converter for wireless power transfer have been obtained with the usage of the state-variable method. The graphical dependencies of power loss and efficiency are obtained and analyzed.
{"title":"Energy Parameters of the Serial-To-Serial Resonant Converter with Pulse-Number Control for Wireless Power Transfer","authors":"G. Pavlov, M. Pokrovskiy, I. Vinnichenko, D. Vinnichenko, I. Zhuk","doi":"10.1109/IEPS51250.2020.9263195","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263195","url":null,"abstract":"The energy parameters of the serial-to-serial resonant converter for wireless power transfer are analyzed. The expressions for determining static and dynamic losses of the resonant converter for wireless power transfer have been obtained with the usage of the state-variable method. The graphical dependencies of power loss and efficiency are obtained and analyzed.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120917355","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263141
O. Shutenko, S. Ponomarenko
The paper presents a method to assess the reliability of the results of periodic monitoring of transformer oils. The verification of method efficiency by analysing real operating data is carried out. The causes of distortions in dependencies of oils quality indicators on the operating time have been analysed.
{"title":"Reliability Assessment of the Results of Periodic Monitoring of the Transformer Oils Condition","authors":"O. Shutenko, S. Ponomarenko","doi":"10.1109/IEPS51250.2020.9263141","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263141","url":null,"abstract":"The paper presents a method to assess the reliability of the results of periodic monitoring of transformer oils. The verification of method efficiency by analysing real operating data is carried out. The causes of distortions in dependencies of oils quality indicators on the operating time have been analysed.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133050658","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263121
Milad Kabirifar, M. Fotuhi‐Firuzabad, M. Moeini‐Aghtaie, Niloofar Pourghaderi
Active distribution network (ADN) expansion planning by modeling network active management is addressed in this paper. In this regard the expansion of distributed energy resources (DERs) and distribution network assets are jointly planned. In the proposed model active management is applied to efficiently utilize the DERs in the planning problem and alleviated the uncertainties. In this paper energy storage systems (ESSs) as an important DER are utilized in active management framework. To model active management of the network, based on load and renewable energy resources’ behavior, some operating levels are regarded for each planning time stage. The objective is to minimize the net present worth of investment, maintenance and operation costs for all planning stages and operating levels. As the problem is solved the expansion plans of network alternatives including feeders, transformers, and substations as long as DERs including micro turbines, wind turbines and ESSs are extracted. Furthermore, the optimal operations of the network and DERs are obtained through the operating levels. Associated uncertainties are considered using a correlated scenario based approach. The problem is mathematically modeled in the form of mixed integer linear programming (MILP).
{"title":"Multistage Active Distribution Network Integrated Planning Incorporating Energy Storage Systems and Active Network Management","authors":"Milad Kabirifar, M. Fotuhi‐Firuzabad, M. Moeini‐Aghtaie, Niloofar Pourghaderi","doi":"10.1109/IEPS51250.2020.9263121","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263121","url":null,"abstract":"Active distribution network (ADN) expansion planning by modeling network active management is addressed in this paper. In this regard the expansion of distributed energy resources (DERs) and distribution network assets are jointly planned. In the proposed model active management is applied to efficiently utilize the DERs in the planning problem and alleviated the uncertainties. In this paper energy storage systems (ESSs) as an important DER are utilized in active management framework. To model active management of the network, based on load and renewable energy resources’ behavior, some operating levels are regarded for each planning time stage. The objective is to minimize the net present worth of investment, maintenance and operation costs for all planning stages and operating levels. As the problem is solved the expansion plans of network alternatives including feeders, transformers, and substations as long as DERs including micro turbines, wind turbines and ESSs are extracted. Furthermore, the optimal operations of the network and DERs are obtained through the operating levels. Associated uncertainties are considered using a correlated scenario based approach. The problem is mathematically modeled in the form of mixed integer linear programming (MILP).","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115867943","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263211
M. Hasanov, A. Zakovorotniy, S. Leonov, G. Khrypunov, V. Dmitrienko, A. Klochko
A new method of synthesizing neural network for comparing, identifying, and classifying various objects through bipolar encoding of their attributes is offered. The mentioned method broadens the neuron network applicability sphere for solving tasks of identification and classification due to the use of proximity functions applying finer proximity attributes for discrete objects than the Hemming’s distance.
{"title":"Intellectual methods of comparing power generating objects","authors":"M. Hasanov, A. Zakovorotniy, S. Leonov, G. Khrypunov, V. Dmitrienko, A. Klochko","doi":"10.1109/IEPS51250.2020.9263211","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263211","url":null,"abstract":"A new method of synthesizing neural network for comparing, identifying, and classifying various objects through bipolar encoding of their attributes is offered. The mentioned method broadens the neuron network applicability sphere for solving tasks of identification and classification due to the use of proximity functions applying finer proximity attributes for discrete objects than the Hemming’s distance.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134313283","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263139
K. Rezvaya, Cherkashenko Mikhaylo, Viktor Drankovskiy, Tynyanova Irina, V. Makarov
In this work, the method of non-dimension averaged parameters is applied. It allows to choose the optimal geometry of the elements of the water passage at the initial stages of designing a new reversible hydraulic machine or modernizing an existing one. This method has proved positive in the numerical study of high-head reversible hydraulic machines at pressures of 200 and 500 m. Using the method of non-dimension averaged parameters in calculation it is necessary to have geometric parameters only in the specific cross-sections of the water passage. This is very effective in terms of saving time and computational resources. In the course of the work, three variants of the water passage of the high-head low-speed reversible ORO500 hydraulic machine were investigated. As a result, it was determined that the geometry of the water passage’s elements significantly effects the hydraulic machine’s parameters. The highest losses value (62 %) is in the inlet (spiral casing with stator and wicket gate). Therefore, the parameters of these elements were changed. Hydraulic efficiency increased by 1.16 % results from changing the parameters of the spiral casing (increasing the average flow angle by 100). Changing the geometry of the wicket gate leads to additional increasing of efficiency by 0.84 %.
{"title":"Using mathematical modeling for determination the optimal geometric parameters of a pump-turbine water passage","authors":"K. Rezvaya, Cherkashenko Mikhaylo, Viktor Drankovskiy, Tynyanova Irina, V. Makarov","doi":"10.1109/IEPS51250.2020.9263139","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263139","url":null,"abstract":"In this work, the method of non-dimension averaged parameters is applied. It allows to choose the optimal geometry of the elements of the water passage at the initial stages of designing a new reversible hydraulic machine or modernizing an existing one. This method has proved positive in the numerical study of high-head reversible hydraulic machines at pressures of 200 and 500 m. Using the method of non-dimension averaged parameters in calculation it is necessary to have geometric parameters only in the specific cross-sections of the water passage. This is very effective in terms of saving time and computational resources. In the course of the work, three variants of the water passage of the high-head low-speed reversible ORO500 hydraulic machine were investigated. As a result, it was determined that the geometry of the water passage’s elements significantly effects the hydraulic machine’s parameters. The highest losses value (62 %) is in the inlet (spiral casing with stator and wicket gate). Therefore, the parameters of these elements were changed. Hydraulic efficiency increased by 1.16 % results from changing the parameters of the spiral casing (increasing the average flow angle by 100). Changing the geometry of the wicket gate leads to additional increasing of efficiency by 0.84 %.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133223697","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263222
V. Ivakhno, V. Zamaruiev, B. Styslo, A. Blinov, D. Vinnikov, R. Kosenko
The article presents a control algorithm of a bidirectional isolated converter with insulated gate bipolar transistors (IGBT). The primary stage of the converter is a traditional full-bridge voltage-source inverter (Voltage-Fed, VF) based on IGBT with reverse diodes shunted by snubber capacitors. The secondary stage is based on IGBT with reverse diodes full-bridge Current-Fed (CF) inverter and a bidirectional four-quadrant power switch (FQS) based on two IGBT with reverse diodes is connected in series with the transformer. For the energy transfer mode from the VF stage to the CF stage, a separated-commutation switching algorithm that provides a zero current switching (ZCS) turn-off mode and an inductive snubber turn-on mode for the CF switches, and a zero-voltage-switching (ZVS) and capacitive snubber turn-off mode for the VF switches is described. Leakage inductance of the transformer is used as an inductive snubber. When the transistors of the VF stage are turning-off, an additional, in comparison with the known solutions, forced switching-on of the CF stage main transistors on the interval of half-period provides a resonant overcharge of the snubber capacitors. This ensures the ZVS mode of turning on of the VF stage transistors in a wide range of load current changes, up to idle mode. The proposed ideas are verified with simulations in MATLAB. The topology is proposed for high power battery energy storage systems.
{"title":"Wide ZVS Range Full-Bridge DC-DC Converter with Quasi-Resonant Switching","authors":"V. Ivakhno, V. Zamaruiev, B. Styslo, A. Blinov, D. Vinnikov, R. Kosenko","doi":"10.1109/IEPS51250.2020.9263222","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263222","url":null,"abstract":"The article presents a control algorithm of a bidirectional isolated converter with insulated gate bipolar transistors (IGBT). The primary stage of the converter is a traditional full-bridge voltage-source inverter (Voltage-Fed, VF) based on IGBT with reverse diodes shunted by snubber capacitors. The secondary stage is based on IGBT with reverse diodes full-bridge Current-Fed (CF) inverter and a bidirectional four-quadrant power switch (FQS) based on two IGBT with reverse diodes is connected in series with the transformer. For the energy transfer mode from the VF stage to the CF stage, a separated-commutation switching algorithm that provides a zero current switching (ZCS) turn-off mode and an inductive snubber turn-on mode for the CF switches, and a zero-voltage-switching (ZVS) and capacitive snubber turn-off mode for the VF switches is described. Leakage inductance of the transformer is used as an inductive snubber. When the transistors of the VF stage are turning-off, an additional, in comparison with the known solutions, forced switching-on of the CF stage main transistors on the interval of half-period provides a resonant overcharge of the snubber capacitors. This ensures the ZVS mode of turning on of the VF stage transistors in a wide range of load current changes, up to idle mode. The proposed ideas are verified with simulations in MATLAB. The topology is proposed for high power battery energy storage systems.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129582120","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263212
S. Shevchenko, D. Danylchenko, S. Dryvetskyi
The purpose of the article is to develop a method for determining the electrical strength of the system "wire insulation - line insulator", to conduct experimental studies of the electrical strength of the insulation of this system, to obtain values of the electrical strength of the insulation of the wires with a protective coating, which will be able to clarify the parameters of the resistance of overhead power transmission lines.
{"title":"Experimental Research of the Electrical Strength of the Insulated System “Protected Wire-Line Insulator”","authors":"S. Shevchenko, D. Danylchenko, S. Dryvetskyi","doi":"10.1109/IEPS51250.2020.9263212","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263212","url":null,"abstract":"The purpose of the article is to develop a method for determining the electrical strength of the system \"wire insulation - line insulator\", to conduct experimental studies of the electrical strength of the insulation of this system, to obtain values of the electrical strength of the insulation of the wires with a protective coating, which will be able to clarify the parameters of the resistance of overhead power transmission lines.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121704970","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263137
D. Tugay, S. Korneliuk, Valentyn Akymov, G. Zhemerov
The quality of compensation of harmonic distortions for network voltages and currents by means of the power active filter depends on the control system settings. The difference in quality indicators of power supply when placing phase sensors of the network to generate a reference signal for two possible cases – on the network terminals and on the load terminals (at the point of load connection) is showed in the paper. It is proved that in asymmetrical modes of three-phase power supply system operation the placement of phase voltage sensors on load terminals leads to a decrease in the efficiency, shift coefficient and an increase in the THD of a network phase voltages and currents in comparison with the second case. The developed theoretical propositions using the modeling of power supply system with power active filter in Matlab environment are confirmed.
{"title":"Localization of the Phase Voltage Measurement Location for Active Power Filter Controlling","authors":"D. Tugay, S. Korneliuk, Valentyn Akymov, G. Zhemerov","doi":"10.1109/IEPS51250.2020.9263137","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263137","url":null,"abstract":"The quality of compensation of harmonic distortions for network voltages and currents by means of the power active filter depends on the control system settings. The difference in quality indicators of power supply when placing phase sensors of the network to generate a reference signal for two possible cases – on the network terminals and on the load terminals (at the point of load connection) is showed in the paper. It is proved that in asymmetrical modes of three-phase power supply system operation the placement of phase voltage sensors on load terminals leads to a decrease in the efficiency, shift coefficient and an increase in the THD of a network phase voltages and currents in comparison with the second case. The developed theoretical propositions using the modeling of power supply system with power active filter in Matlab environment are confirmed.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125659293","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 : 2020-09-07DOI: 10.1109/IEPS51250.2020.9263081
A. Drozdov, G. Khrypunov, V. O. Nikitin, A. Meriuts, M. Khrypunov, M. Kirichenko, R. Zaitsev
The time-voltage characteristics of high-resistance Mo/p-CdTe/Mo structures under influence of single voltage pulses in range from 20 to 80 V and duration up to 30 ns were studied. We established that for high-resistivity Me-A2B6-Me structures, a restorable switching into a high electrical conductivity state can be realized as the effect of current pulses duration up to 30 ns and no more than 20 V voltage amplitude. It has been proposed the physical mechanism that leads to realizing switching effect. Such time-voltage characteristic allows to conclude that such Me-A2B6-Me structures is perspective for use as keys and switching elements of micro- and nanosystem technology.
{"title":"Switching Effects from a High-Resistance State to a High Electrical Conductivity State in Mo/P-Cdte/Mo Structure","authors":"A. Drozdov, G. Khrypunov, V. O. Nikitin, A. Meriuts, M. Khrypunov, M. Kirichenko, R. Zaitsev","doi":"10.1109/IEPS51250.2020.9263081","DOIUrl":"https://doi.org/10.1109/IEPS51250.2020.9263081","url":null,"abstract":"The time-voltage characteristics of high-resistance Mo/p-CdTe/Mo structures under influence of single voltage pulses in range from 20 to 80 V and duration up to 30 ns were studied. We established that for high-resistivity Me-A2B6-Me structures, a restorable switching into a high electrical conductivity state can be realized as the effect of current pulses duration up to 30 ns and no more than 20 V voltage amplitude. It has been proposed the physical mechanism that leads to realizing switching effect. Such time-voltage characteristic allows to conclude that such Me-A2B6-Me structures is perspective for use as keys and switching elements of micro- and nanosystem technology.","PeriodicalId":235261,"journal":{"name":"2020 IEEE 4th International Conference on Intelligent Energy and Power Systems (IEPS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133879727","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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