Pub Date : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105404
S. Pal, Y. Hobara, S. Chakrabarti, P. Schnoor
In this paper, sub-ionospheric Very Low Frequency/Low Frequency (VLF/LF) radio signals over the North Atlantic zone and North Pacific zone have been analysed during the major Sudden Stratospheric Warming (SSW) event of January, 2009. Signals from the transmitters like, NAA (24.0 kHz) and NKR (37.5 kHz) received at Germany and signals from the transmitters like, NLK (24.8 kHz) and NPM (21.4 kHz) received at Japan are considered for possible lower ionospheric response to the SSW event. Very clear and significant increase/decrease of average nighttime and daytime VLF/LF amplitudes from the quiet signals have been found associated with the SSW event.
{"title":"Response of the sub-ionospheric VLF/LF signals to the major SSW event of 2009","authors":"S. Pal, Y. Hobara, S. Chakrabarti, P. Schnoor","doi":"10.23919/URSIGASS.2017.8105404","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105404","url":null,"abstract":"In this paper, sub-ionospheric Very Low Frequency/Low Frequency (VLF/LF) radio signals over the North Atlantic zone and North Pacific zone have been analysed during the major Sudden Stratospheric Warming (SSW) event of January, 2009. Signals from the transmitters like, NAA (24.0 kHz) and NKR (37.5 kHz) received at Germany and signals from the transmitters like, NLK (24.8 kHz) and NPM (21.4 kHz) received at Japan are considered for possible lower ionospheric response to the SSW event. Very clear and significant increase/decrease of average nighttime and daytime VLF/LF amplitudes from the quiet signals have been found associated with the SSW event.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126197896","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8104987
L. Nowosielski, M. Wnuk
Microstrip antennas have been since more than ten years one of the most innovative areas of antenna technology. As the novelty in article, one of possible diagnostic methods of microstrip antennas is presented, which is based on using thermography. Within the method proposed a distribution of temperatures recorded by the thermovision camera on the microstrip antenna surface is used for its diagnostics. The above diagnostics is based on verification of antenna parameters (SWR) influencing local changes of the temperature distribution on the antenna surface. The proposed methodology of antennas diagnostics was discussed basing on the example of three models of microstrip antennas.
{"title":"The new method of the microstrip antennas diagnosing","authors":"L. Nowosielski, M. Wnuk","doi":"10.23919/URSIGASS.2017.8104987","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8104987","url":null,"abstract":"Microstrip antennas have been since more than ten years one of the most innovative areas of antenna technology. As the novelty in article, one of possible diagnostic methods of microstrip antennas is presented, which is based on using thermography. Within the method proposed a distribution of temperatures recorded by the thermovision camera on the microstrip antenna surface is used for its diagnostics. The above diagnostics is based on verification of antenna parameters (SWR) influencing local changes of the temperature distribution on the antenna surface. The proposed methodology of antennas diagnostics was discussed basing on the example of three models of microstrip antennas.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126446507","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105315
S. A. Elhamied, H. Malhat, S. Zainud-Deen
This paper investigates the radiation characteristics of on-chip microstrip patch reflectarray for 60 GHz system. The proposed reflectarray is fed using on-chip cylindrical dielectric resonator antenna, CDRA placed at a distance 42.5 mm from the array aperture. The antenna introduces good impedance matching at 61 GHz. The impedance bandwidth is 1.35 GHz. The reflectarray consists of 289 unit-cell elements covering an area of 42.5 × 42.5 mm2 in x-y plane. Each unit-cell element consists of a square microstrip patch surrounded by four rectangular strips. The phase of the reflected plane wave from the unit-cell element is controlled by varying the patch length. The reflectarray structure and the CDRA are simulated using full wave simulation, finite integration technique, FIT. A maximum gain if 17.5 dBi is achieved and 2.85 % bandwidth is obtained. Offset beams scanning in different directions are investigated.
{"title":"On-chip microstrip patch reflectarray","authors":"S. A. Elhamied, H. Malhat, S. Zainud-Deen","doi":"10.23919/URSIGASS.2017.8105315","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105315","url":null,"abstract":"This paper investigates the radiation characteristics of on-chip microstrip patch reflectarray for 60 GHz system. The proposed reflectarray is fed using on-chip cylindrical dielectric resonator antenna, CDRA placed at a distance 42.5 mm from the array aperture. The antenna introduces good impedance matching at 61 GHz. The impedance bandwidth is 1.35 GHz. The reflectarray consists of 289 unit-cell elements covering an area of 42.5 × 42.5 mm2 in x-y plane. Each unit-cell element consists of a square microstrip patch surrounded by four rectangular strips. The phase of the reflected plane wave from the unit-cell element is controlled by varying the patch length. The reflectarray structure and the CDRA are simulated using full wave simulation, finite integration technique, FIT. A maximum gain if 17.5 dBi is achieved and 2.85 % bandwidth is obtained. Offset beams scanning in different directions are investigated.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128015584","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105079
J. Vanhamel, S. Berkenbosch, E. Dekemper, P. Leroux, E. Neefs, E. V. Van Lil
In the frame of a mission of the European Space Agency (ESA) a space qualified RF-generator needs to be developed to drive an AOTF (Acousto-Optical Tunable Filter) to make hyper-spectral images of the limb of the Earth. Custom off-the-shelf electronics can not fulfil the requirements for this scientific mission, hence alternative solutions for the RF-generation are investigated. This paper describes one of the possible solutions.
{"title":"Testing of a possible RF-generator for a space based AOTF application in the frame of an ESA space mission","authors":"J. Vanhamel, S. Berkenbosch, E. Dekemper, P. Leroux, E. Neefs, E. V. Van Lil","doi":"10.23919/URSIGASS.2017.8105079","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105079","url":null,"abstract":"In the frame of a mission of the European Space Agency (ESA) a space qualified RF-generator needs to be developed to drive an AOTF (Acousto-Optical Tunable Filter) to make hyper-spectral images of the limb of the Earth. Custom off-the-shelf electronics can not fulfil the requirements for this scientific mission, hence alternative solutions for the RF-generation are investigated. This paper describes one of the possible solutions.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128077466","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105174
M. Bevacqua, Tommaso Isemia
A novel strategy is proposed to achieve qualitative characterization of penetrable and impenetrable objects buried in lossy soils. The approach, aimed to support reconstruction, is based on the consideration that for high conductivity and dielectric scatterers, induced and ‘equivalent’ currents can be considered localized on the boundary. In particular, an ad hoc sparsity promoting inversion approach which also allow to enforce congruence amongst the different currents is proposed to localize and retrieve the shape of the unknown objects.
{"title":"Sparsity promotion and inverse source problems for qualitative reconstruction of buried targets","authors":"M. Bevacqua, Tommaso Isemia","doi":"10.23919/URSIGASS.2017.8105174","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105174","url":null,"abstract":"A novel strategy is proposed to achieve qualitative characterization of penetrable and impenetrable objects buried in lossy soils. The approach, aimed to support reconstruction, is based on the consideration that for high conductivity and dielectric scatterers, induced and ‘equivalent’ currents can be considered localized on the boundary. In particular, an ad hoc sparsity promoting inversion approach which also allow to enforce congruence amongst the different currents is proposed to localize and retrieve the shape of the unknown objects.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125465192","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105035
K. Sun, J. Lee, J. Graham
The field distributions of various modes in rectangular waveguides filled with uniaxial media are presented. The presented cases include aligned cases when the optic axis is parallel to one of the coordinate axes and the tilted cases when the optic axis is not parallel to any of the coordinate axes but still lies within one of the two side-wall planes. In the aligned uniaxial-z case the analytical solution is compared with the results of the dyadic green's functions (DGF). In other aligned cases the field distributions of selected extra-ordinary wave modes are also plotted and to be compared with the isotropic case. In the tilted cases, the field distributions of the hybrid modes which are coupled ordinary-waves and extra-ordinary waves show asymmetry which is not seen in the aligned cases and isotropic case. The validity of the hybrid mode field plots are verified by comparing a limiting tilted case with analytical solutions of an aligned case.
{"title":"Field distributions of the hybrid modes in rectangular waveguides filled with uniaxial media with tilted optic axis lying in sidewall planes","authors":"K. Sun, J. Lee, J. Graham","doi":"10.23919/URSIGASS.2017.8105035","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105035","url":null,"abstract":"The field distributions of various modes in rectangular waveguides filled with uniaxial media are presented. The presented cases include aligned cases when the optic axis is parallel to one of the coordinate axes and the tilted cases when the optic axis is not parallel to any of the coordinate axes but still lies within one of the two side-wall planes. In the aligned uniaxial-z case the analytical solution is compared with the results of the dyadic green's functions (DGF). In other aligned cases the field distributions of selected extra-ordinary wave modes are also plotted and to be compared with the isotropic case. In the tilted cases, the field distributions of the hybrid modes which are coupled ordinary-waves and extra-ordinary waves show asymmetry which is not seen in the aligned cases and isotropic case. The validity of the hybrid mode field plots are verified by comparing a limiting tilted case with analytical solutions of an aligned case.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132016202","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8104970
Paweł T. Kosz, S. Ambroziak, L. Correia
This paper presents an off-body radio channel measurements in a ferry passenger cabin at 2.45 GHz band, for static sleeping scenarios with different body orientation and on-body antennas placements, and also for upper and lower sleeping berths. The measurements have been performed with two types of on-body wearable receiving antennas: FlexPIFA (flexible planar inverted F antenna), and FlexNotch (flexible adhesive-backed notch antenna) and one patch off-body transmitting antenna. The measurement equipment, measurement environment and investigated scenarios are described. A preliminary analysis of the results — the mean value (μ) and standard deviation (σ) — is presented. In general, the propagation path loss mainly depends on the type and location of the receiving antennas, and also on the body orientation during sleeping and surrounding elements of environment. The lowest mean path loss values (both below 56 dB) were obtained for upper sleeping berth and scenario, where receiving FlexPIFA antennas were mounted on chest and back during lying on the left side. In contrast, the highest values (both over 70 dB) were obtained for upper sleeping berth and scenario, where FlexNotch antennas were mounted on chest and right wrist during lying on the left side. Moreover, the standard deviation varies in a range from 3.7 dB up to 8.0 dB for all cases.
{"title":"Radio channel measurements in off-body communications in a ferry passenger cabin","authors":"Paweł T. Kosz, S. Ambroziak, L. Correia","doi":"10.23919/URSIGASS.2017.8104970","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8104970","url":null,"abstract":"This paper presents an off-body radio channel measurements in a ferry passenger cabin at 2.45 GHz band, for static sleeping scenarios with different body orientation and on-body antennas placements, and also for upper and lower sleeping berths. The measurements have been performed with two types of on-body wearable receiving antennas: FlexPIFA (flexible planar inverted F antenna), and FlexNotch (flexible adhesive-backed notch antenna) and one patch off-body transmitting antenna. The measurement equipment, measurement environment and investigated scenarios are described. A preliminary analysis of the results — the mean value (μ) and standard deviation (σ) — is presented. In general, the propagation path loss mainly depends on the type and location of the receiving antennas, and also on the body orientation during sleeping and surrounding elements of environment. The lowest mean path loss values (both below 56 dB) were obtained for upper sleeping berth and scenario, where receiving FlexPIFA antennas were mounted on chest and back during lying on the left side. In contrast, the highest values (both over 70 dB) were obtained for upper sleeping berth and scenario, where FlexNotch antennas were mounted on chest and right wrist during lying on the left side. Moreover, the standard deviation varies in a range from 3.7 dB up to 8.0 dB for all cases.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130244049","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8104963
T. Anthony, A. Zaghloul
Specially arranged metamaterial structures may lead to a higher degree of constitutive parameter tailoring. This paper investigates a multi-fin metamaterial-loaded monopole with a metal cap. Capacitively-loaded-loop (CLL) metamaterial elements are placed on fins, radially arranged around the monopole antenna. The metamaterial fins change the radiation pattern of the monopole to a sectoral beam in the azimuth plane with a significant front-to-back ratio, and the elevation peak relocates normal to the monopole due to a metal cap. An experimental model is built with six manufactured fin inserts inside an additively manufactured (3D-printed) holder that surrounds the monopole. Simulation and measurement results are compared and show agreement.
{"title":"Modeling and measurement of a multi-fin metamaterial-loaded monopole with metal cap","authors":"T. Anthony, A. Zaghloul","doi":"10.23919/URSIGASS.2017.8104963","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8104963","url":null,"abstract":"Specially arranged metamaterial structures may lead to a higher degree of constitutive parameter tailoring. This paper investigates a multi-fin metamaterial-loaded monopole with a metal cap. Capacitively-loaded-loop (CLL) metamaterial elements are placed on fins, radially arranged around the monopole antenna. The metamaterial fins change the radiation pattern of the monopole to a sectoral beam in the azimuth plane with a significant front-to-back ratio, and the elevation peak relocates normal to the monopole due to a metal cap. An experimental model is built with six manufactured fin inserts inside an additively manufactured (3D-printed) holder that surrounds the monopole. Simulation and measurement results are compared and show agreement.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130427716","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105115
Guanbo Chen, J. Stang, M. Moghaddam
In this paper, we propose an inverse scattering method with compressive sensing to image and track the metallic ablation probe during the interstitial thermal therapy. The contrast source inversion (CSI) method is used to solve the inverse scattering problem, which determines the location of the probe by utilizing the scattered field data produced by the contrast source current at the probe surface. A fast spectral gradient-projection method is used to solve the linear inverse problem with sparsity constraints and reconstructs the surface profile of the metallic probe. The proposed method will first be validated numerically by imaging a PEC probe in a realistic interstitial thermal therapy model, and then be validated experimentally with a vector network analyzer based inverse scattering measurement system.
{"title":"Real-time tracking of metallic treatment probe in interstitial thermal therapy","authors":"Guanbo Chen, J. Stang, M. Moghaddam","doi":"10.23919/URSIGASS.2017.8105115","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105115","url":null,"abstract":"In this paper, we propose an inverse scattering method with compressive sensing to image and track the metallic ablation probe during the interstitial thermal therapy. The contrast source inversion (CSI) method is used to solve the inverse scattering problem, which determines the location of the probe by utilizing the scattered field data produced by the contrast source current at the probe surface. A fast spectral gradient-projection method is used to solve the linear inverse problem with sparsity constraints and reconstructs the surface profile of the metallic probe. The proposed method will first be validated numerically by imaging a PEC probe in a realistic interstitial thermal therapy model, and then be validated experimentally with a vector network analyzer based inverse scattering measurement system.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134057175","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 : 2017-08-01DOI: 10.23919/URSIGASS.2017.8105356
J. Tissier, M. Latrach
In this paper, a broadband rectenna, for ambient RF energy harvesting applications, is presented. It is composed of a broadband spiral antenna with its balun, optimized to cover the principal frequency bands where there is RF energy to harvest (GSM900, GSM1800, UMTS2100 and WIFI). This antenna will be associated, in a first step, with a dual-band rectifier (GSM900-GSM1800) to do a complete rectenna. Source-pull simulations have been used to determine the optimal diode impedance giving the maximum conversion efficiency, in frequency bands of interest, for low input RF power levels. A broadband matching network has then been synthesized to ensure optimal operation of the rectifier in the GSM900 and GSM1800 bands.
{"title":"Broadband rectenna for ambient RF energy harvesting applications","authors":"J. Tissier, M. Latrach","doi":"10.23919/URSIGASS.2017.8105356","DOIUrl":"https://doi.org/10.23919/URSIGASS.2017.8105356","url":null,"abstract":"In this paper, a broadband rectenna, for ambient RF energy harvesting applications, is presented. It is composed of a broadband spiral antenna with its balun, optimized to cover the principal frequency bands where there is RF energy to harvest (GSM900, GSM1800, UMTS2100 and WIFI). This antenna will be associated, in a first step, with a dual-band rectifier (GSM900-GSM1800) to do a complete rectenna. Source-pull simulations have been used to determine the optimal diode impedance giving the maximum conversion efficiency, in frequency bands of interest, for low input RF power levels. A broadband matching network has then been synthesized to ensure optimal operation of the rectifier in the GSM900 and GSM1800 bands.","PeriodicalId":377869,"journal":{"name":"2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134116779","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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