Pub Date : 2018-10-01DOI: 10.23919/RADIO.2018.8572423
A. Slobozhanyuk
Metasurfaces have become a new paradigm in the studies of artificial subwavelength structures due to their potential to overcome many challenges typically associated with metamaterials. In this contribution, recent advances in the field of microwave metasurfaces are described with the focus on novel fundamental ideas of two-dimensional topologically protected structures as well as on applications in the field of medical imaging.
{"title":"Metasurfaces: From Fundamental Ideas of Topological Photonics to Applications in Magnetic Resonance Imaging","authors":"A. Slobozhanyuk","doi":"10.23919/RADIO.2018.8572423","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572423","url":null,"abstract":"Metasurfaces have become a new paradigm in the studies of artificial subwavelength structures due to their potential to overcome many challenges typically associated with metamaterials. In this contribution, recent advances in the field of microwave metasurfaces are described with the focus on novel fundamental ideas of two-dimensional topologically protected structures as well as on applications in the field of medical imaging.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122690409","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572480
A. Świerniak, D. Borys, Michal Krzeslak
We propose an extension of evolutionary games which enables to include time-varying external disturbances which may describe effects of environmental changes or controlled interventions. The main idea is to endow payoff tables with alterations of phenotype adjustment during the transient generations. This approach allows for modeling of biological effects of radiowaves on the cellular level.
{"title":"Games with Resources and Biological Effects of Radiowaves","authors":"A. Świerniak, D. Borys, Michal Krzeslak","doi":"10.23919/RADIO.2018.8572480","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572480","url":null,"abstract":"We propose an extension of evolutionary games which enables to include time-varying external disturbances which may describe effects of environmental changes or controlled interventions. The main idea is to endow payoff tables with alterations of phenotype adjustment during the transient generations. This approach allows for modeling of biological effects of radiowaves on the cellular level.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114333871","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572347
H. Pretl, Silvester Sadjina
The upgrade from 3GPP Long Term Evolution (LTE) towards LTE-Advanced introduced Carrier-Aggregation (CA), necessitating multiple receivers (RX) and transmitters (TX) operating concurrently on a single transceiver die, causing potential interference among them. The introduction of 5G New Radio (5G NR) will require Dual Connectivity (DC) with LTE in the first phase and thus also require a multitude of parallel-operating high-performance receive and transmit chains in a multi-mode LTE-A/5G NR transceiver, driving the need for analog and digital techniques for self-interference mitigation due to coupling between different parts of the transceiver. This paper catalogs the various cross-talk effects and presents digital as well as mixed-signal interference mitigation techniques in condensed form.
从3GPP长期演进(LTE)到LTE- advanced的升级引入了载波聚合(CA)，这需要多个接收器(RX)和发射器(TX)在单个收发器芯片上同时工作，从而导致它们之间的潜在干扰。5G新无线电(5G NR)的引入将需要在第一阶段使用LTE的双连接(DC)，因此还需要在多模LTE- a /5G NR收发器中使用大量并行操作的高性能接收和发送链，从而推动了对模拟和数字技术的需求，以减轻由于收发器不同部分之间耦合而产生的自干扰。本文对各种串扰效应进行了分类，并以简明的形式介绍了数字和混合信号干扰缓解技术。
{"title":"Self-Interference in LTE-Advanced and 5G NR Transceivers","authors":"H. Pretl, Silvester Sadjina","doi":"10.23919/RADIO.2018.8572347","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572347","url":null,"abstract":"The upgrade from 3GPP Long Term Evolution (LTE) towards LTE-Advanced introduced Carrier-Aggregation (CA), necessitating multiple receivers (RX) and transmitters (TX) operating concurrently on a single transceiver die, causing potential interference among them. The introduction of 5G New Radio (5G NR) will require Dual Connectivity (DC) with LTE in the first phase and thus also require a multitude of parallel-operating high-performance receive and transmit chains in a multi-mode LTE-A/5G NR transceiver, driving the need for analog and digital techniques for self-interference mitigation due to coupling between different parts of the transceiver. This paper catalogs the various cross-talk effects and presents digital as well as mixed-signal interference mitigation techniques in condensed form.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131990702","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572379
T. Sarkar
The objective of this short course is to illustrate the basic principles of a higher order basis in computational electromagnetics. The basic principles will be illustrated through its application in the solution of integral equations and in finite elements. Basically use of a higher order basis not only provides the continuity of the current but also of the charge in an integral equation setting. This results in partial elimination of the breakdown at very low frequency. Also, the number of unknowns to approximate a given problem is dramatically reduced. In addition, the defect at an internal resonant frequency in the analysis of a closed body is highly localized without seriously affecting the solution and therefore one can use an EFIE formulation rather than a CFIE. Typically, for a higher order basis, only 10�20 unknowns per wavelength squared of surface area are needed, leading to a reduction of an order of the magnitude of the size of the impedance matrix that needs to be solved. Hence, problems using the subsectional basis that require a supercomputer to solve can easily be solved on a laptop computer. Also, electrically large problems can easily be handled using modest computer resources, whereas the same problems cannot be solved on large computers using the sub sectional basis because the matrix sizes will be extremely large! For example, if one wishes to analyze a metallic cube with each dimension of four times the wavelength, using 10 subsections per wavelength in a piecewise sub sectional basis will lead to a total of approximately 57,600 unknowns, whereas with the higher order basis, it will use approximately 2700 unknowns and the total solution time on a laptop PC will be less than a minute! When applying this methodology to the finite element method it will be seen that similar improvement is not only achieved in the computational procedures but also the rate of convergence is highly accelerated. Many other interesting and salient features of the higher order basis are also discussed in this presentation.
{"title":"The use of a Higher Order Basis in Computational Electromagnetics","authors":"T. Sarkar","doi":"10.23919/RADIO.2018.8572379","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572379","url":null,"abstract":"The objective of this short course is to illustrate the basic principles of a higher order basis in computational electromagnetics. The basic principles will be illustrated through its application in the solution of integral equations and in finite elements. Basically use of a higher order basis not only provides the continuity of the current but also of the charge in an integral equation setting. This results in partial elimination of the breakdown at very low frequency. Also, the number of unknowns to approximate a given problem is dramatically reduced. In addition, the defect at an internal resonant frequency in the analysis of a closed body is highly localized without seriously affecting the solution and therefore one can use an EFIE formulation rather than a CFIE. Typically, for a higher order basis, only 10�20 unknowns per wavelength squared of surface area are needed, leading to a reduction of an order of the magnitude of the size of the impedance matrix that needs to be solved. Hence, problems using the subsectional basis that require a supercomputer to solve can easily be solved on a laptop computer. Also, electrically large problems can easily be handled using modest computer resources, whereas the same problems cannot be solved on large computers using the sub sectional basis because the matrix sizes will be extremely large! For example, if one wishes to analyze a metallic cube with each dimension of four times the wavelength, using 10 subsections per wavelength in a piecewise sub sectional basis will lead to a total of approximately 57,600 unknowns, whereas with the higher order basis, it will use approximately 2700 unknowns and the total solution time on a laptop PC will be less than a minute! When applying this methodology to the finite element method it will be seen that similar improvement is not only achieved in the computational procedures but also the rate of convergence is highly accelerated. Many other interesting and salient features of the higher order basis are also discussed in this presentation.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116794327","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572460
M. Rabah, D. Seetharamdoo, Chukwuka Ozuem
This paper discusses the problem of integrating metamaterial (MTM) structures with antennas. We present a new approach based on the computation of the energies of the surface current modes by means of the theory of characteristic modes (TCM). We also introduce new simple formulation to compute the stored energy using the impedance operation of the method of moment (MoM). This analysis can be done the antenna (driven element) and the inclusion (resonant element).
{"title":"On the Use of Modal Powers and Energies in the Analysis and Design of Metamaterial Structures","authors":"M. Rabah, D. Seetharamdoo, Chukwuka Ozuem","doi":"10.23919/RADIO.2018.8572460","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572460","url":null,"abstract":"This paper discusses the problem of integrating metamaterial (MTM) structures with antennas. We present a new approach based on the computation of the energies of the surface current modes by means of the theory of characteristic modes (TCM). We also introduce new simple formulation to compute the stored energy using the impedance operation of the method of moment (MoM). This analysis can be done the antenna (driven element) and the inclusion (resonant element).","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122236985","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572318
A. Alonge, T. Afullo
Recently, rainfall process over wireless radio links has been designated as an unstable semi-Markovian queue with chaotic service description during rain events. A formal explanation for such queue service behaviour in natural queues like rainfall phenomenon, may be related to the presence of stratified cloud layers representing rain cells, during rain events. In this paper, the concept of service aggregation of rainfall queues obtained from ground measurements is examined in Durban (29°52'S, 30°58'E) in South Africa and Butare (2°36'S, 29°44'E) in Rwanda are further analysed. Our results suggest that - two or more parallel queue servers maybe present - at different strata in the troposphere during typical rain events at these sites.
{"title":"Service Aggregation in Motional Rainfall Cell Queues Over Wireless Radio Links","authors":"A. Alonge, T. Afullo","doi":"10.23919/RADIO.2018.8572318","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572318","url":null,"abstract":"Recently, rainfall process over wireless radio links has been designated as an unstable semi-Markovian queue with chaotic service description during rain events. A formal explanation for such queue service behaviour in natural queues like rainfall phenomenon, may be related to the presence of stratified cloud layers representing rain cells, during rain events. In this paper, the concept of service aggregation of rainfall queues obtained from ground measurements is examined in Durban (29°52'S, 30°58'E) in South Africa and Butare (2°36'S, 29°44'E) in Rwanda are further analysed. Our results suggest that - two or more parallel queue servers maybe present - at different strata in the troposphere during typical rain events at these sites.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"12 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123693370","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572312
Isahar Gabay, A. Shemer, A. Schwarz, Z. Zalevsky, M. Mizrahi, E. Holdengreber, E. Farber
In this paper we show how frequency and time multiplexing super resolution techniques can enhance the spatial resolution of a microwave detection RADAR system while overcoming the resolution limits associated with the size of the antenna as well as the number of the detection channels.
{"title":"Microwave Superresolving Imagining Configurations","authors":"Isahar Gabay, A. Shemer, A. Schwarz, Z. Zalevsky, M. Mizrahi, E. Holdengreber, E. Farber","doi":"10.23919/RADIO.2018.8572312","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572312","url":null,"abstract":"In this paper we show how frequency and time multiplexing super resolution techniques can enhance the spatial resolution of a microwave detection RADAR system while overcoming the resolution limits associated with the size of the antenna as well as the number of the detection channels.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133032483","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572381
M. Ahuna, T. Afullo, A. Alonge
The size of the falling rain drop dictates the extent in which an electromagnetic wave is scattered and absorbed. In this study, an investigation is carried out with the goal of establishing the effects and contributions of heavy rain storms on the maximum drop sizes present in the measured rainfall rate, hence the extent of an electromagnetic wave attenuation. This investigation is carried out in Durban, South Africa (29°52'S, 30°58'E). Results of the study show that at the same rainfall rate, a wireless link will be exposed to different outage levels dependent on different storm magnitudes.
{"title":"Specific Rain Attenuation Dependence on Rain Storm Magnitudes and Measured Drop Sizes","authors":"M. Ahuna, T. Afullo, A. Alonge","doi":"10.23919/RADIO.2018.8572381","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572381","url":null,"abstract":"The size of the falling rain drop dictates the extent in which an electromagnetic wave is scattered and absorbed. In this study, an investigation is carried out with the goal of establishing the effects and contributions of heavy rain storms on the maximum drop sizes present in the measured rainfall rate, hence the extent of an electromagnetic wave attenuation. This investigation is carried out in Durban, South Africa (29°52'S, 30°58'E). Results of the study show that at the same rainfall rate, a wireless link will be exposed to different outage levels dependent on different storm magnitudes.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"64 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134624641","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572449
L. Quazzo, Y. Bacher, N. Froidevaux, H. Braquet, G. Jacquemod
Fast Transient Burst (FTB) tests are performed on Integrated Circuits (IC) in order to simulate a common mode conducted disturbance on supply. Power network distribution is known as the main contributor of FTB weakness of the IC. Due to electromagnetic disturbance, it is not possible to perform measurements during the FTB test. This paper focuses on resonance analysis of the Power Distribution Network (PDN), based on dedicated measurement set-ups. Indeed, the resonance frequencies of the PDN are correlated with the propagation of the FTB signal injected in the circuit. Finally, this study is going to allow us to increase the robustness of the circuit.
{"title":"Resonance Analysis Methods for Estimation of FTB Propagation in Integrated Circuits","authors":"L. Quazzo, Y. Bacher, N. Froidevaux, H. Braquet, G. Jacquemod","doi":"10.23919/RADIO.2018.8572449","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572449","url":null,"abstract":"Fast Transient Burst (FTB) tests are performed on Integrated Circuits (IC) in order to simulate a common mode conducted disturbance on supply. Power network distribution is known as the main contributor of FTB weakness of the IC. Due to electromagnetic disturbance, it is not possible to perform measurements during the FTB test. This paper focuses on resonance analysis of the Power Distribution Network (PDN), based on dedicated measurement set-ups. Indeed, the resonance frequencies of the PDN are correlated with the propagation of the FTB signal injected in the circuit. Finally, this study is going to allow us to increase the robustness of the circuit.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"97 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133723204","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 : 2018-10-01DOI: 10.23919/RADIO.2018.8572414
Monika Chauhan, Biswajeet Mukherjee
In this paper, a novel Fractal Cylindrical Dielectric Resonator Antenna (FCDRA) is presented for Ultra-Wide Band applications (UWB). The proposed antenna is constructed by 30°, 60°, 120°angular portion of cylinder with radius ratio (1:2:3). Stacking of Rogers 3010 $(varepsilon_{mathrm{r}}=10.2)$ and FR-4 $(varepsilon_{mathrm{r}}=4.4)$ dielectric materials are used in proposed antenna for enhancement of the bandwidth. This fractal geometry offers 9.2 GHz operating bandwidth which spans from 3.6 GHz - 12.8 GHz. Proposed antenna attains maximum gain of 9.45 dBi with more than 89% efficiency which is suitable for satellite communication, WiMAX application. Hybrid Electromagnetic $mathbf{HE}_{11 delta}, mathbf{HE}_{12delta}$ modes are identified at 4.43 GHz & 8.31 GHz resonant frequencies respectively.
本文提出了一种用于超宽带应用的新型分形圆柱介质谐振器天线(FCDRA)。该天线由圆柱体的30°、60°、120°角组成，其半径比为1:2:3。采用罗杰斯3010 $(varepsilon_{mathrm{r}}=10.2)$和FR-4 $(varepsilon_{mathrm{r}}=4.4)$介质材料叠加，提高了天线的带宽。这种分形几何提供了9.2 GHz的工作带宽，范围从3.6 GHz到12.8 GHz。该天线的最大增益为9.45 dBi，增益大于89% efficiency which is suitable for satellite communication, WiMAX application. Hybrid Electromagnetic $mathbf{HE}_{11 delta}, mathbf{HE}_{12delta}$ modes are identified at 4.43 GHz & 8.31 GHz resonant frequencies respectively.
{"title":"High Gain Fractal Cylindrical Dielectric Resonator Antenna for UWB Application","authors":"Monika Chauhan, Biswajeet Mukherjee","doi":"10.23919/RADIO.2018.8572414","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572414","url":null,"abstract":"In this paper, a novel Fractal Cylindrical Dielectric Resonator Antenna (FCDRA) is presented for Ultra-Wide Band applications (UWB). The proposed antenna is constructed by 30°, 60°, 120°angular portion of cylinder with radius ratio (1:2:3). Stacking of Rogers 3010 $(varepsilon_{mathrm{r}}=10.2)$ and FR-4 $(varepsilon_{mathrm{r}}=4.4)$ dielectric materials are used in proposed antenna for enhancement of the bandwidth. This fractal geometry offers 9.2 GHz operating bandwidth which spans from 3.6 GHz - 12.8 GHz. Proposed antenna attains maximum gain of 9.45 dBi with more than 89% efficiency which is suitable for satellite communication, WiMAX application. Hybrid Electromagnetic $mathbf{HE}_{11 delta}, mathbf{HE}_{12delta}$ modes are identified at 4.43 GHz & 8.31 GHz resonant frequencies respectively.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114250110","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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