Pub Date : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814361
Yukihiro Enomoto, S. Huang, Wenwei Yu
In recent years, stimulation of deep areas by temporal interference (TI) electric fields has attracted much attention. Previous studies have shown the feasibility of stimulating targeted deep areas mouse brain and nerve bundles for stimulation. However, the possibility to change stimulus focus without changing the electrode layout has not been investigated.In this study, we investigated whether the phase-shift of the TI could be a control parameter for the location of stimulus focus, using a 3D model with 2/3 muscle electrical property.The potential distribution was measured for different phase-shifting cases. The activating function was calculated and compared to confirm the presence or absence of local focuses.As a result, it was observed that sites with significant activating function change with a phase shift. Though all the sites appeared near electrodes, i.e., there were no such sites in the deeper part of the model away from the electrodes. This research is a fundamental step towards effective selective deep nerves from the skin surface.
{"title":"A Simulation Study on the Effect of Phase-shift of Temporal Interference Stimulation","authors":"Yukihiro Enomoto, S. Huang, Wenwei Yu","doi":"10.23919/AT-AP-RASC54737.2022.9814361","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814361","url":null,"abstract":"In recent years, stimulation of deep areas by temporal interference (TI) electric fields has attracted much attention. Previous studies have shown the feasibility of stimulating targeted deep areas mouse brain and nerve bundles for stimulation. However, the possibility to change stimulus focus without changing the electrode layout has not been investigated.In this study, we investigated whether the phase-shift of the TI could be a control parameter for the location of stimulus focus, using a 3D model with 2/3 muscle electrical property.The potential distribution was measured for different phase-shifting cases. The activating function was calculated and compared to confirm the presence or absence of local focuses.As a result, it was observed that sites with significant activating function change with a phase shift. Though all the sites appeared near electrodes, i.e., there were no such sites in the deeper part of the model away from the electrodes. This research is a fundamental step towards effective selective deep nerves from the skin surface.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"39 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124693126","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814365
Dor Zvulun, Y. Brick, A. Boag
To enable the development of low-rank compressible generalized sources integral equations, a modified three-dimensional source is presented. Its design is an extension of a two-dimensional generalized source, composed of an elemental source and an auxiliary absorbing shield. On the shield, equivalent sources are defined to approximately cancel the broadside radiation in the direction of potential observers on an essentially convex geometry. The design principles are discussed and means for the efficient computation of the generalized source’s modified Green’s function, from tabulated samples using non-uniform grids, are described.
{"title":"Three-Dimensional Generalized Sources for Integral Equation Solvers","authors":"Dor Zvulun, Y. Brick, A. Boag","doi":"10.23919/AT-AP-RASC54737.2022.9814365","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814365","url":null,"abstract":"To enable the development of low-rank compressible generalized sources integral equations, a modified three-dimensional source is presented. Its design is an extension of a two-dimensional generalized source, composed of an elemental source and an auxiliary absorbing shield. On the shield, equivalent sources are defined to approximately cancel the broadside radiation in the direction of potential observers on an essentially convex geometry. The design principles are discussed and means for the efficient computation of the generalized source’s modified Green’s function, from tabulated samples using non-uniform grids, are described.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125865700","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814395
M. Binois, R. Duvigneau, M. Elsawy, P. Genevet, Samira Kadhir, St'ephane Lanteri, Nicolas Lebbe
The last 10 years have witnessed an impressive amount of works aiming at the development of thin metamaterials for controlling the wavefront of light, and thus realize planar photonics also referred as flat optics or metaoptics. The concept of metasurface is at the heart of almost all the discoveries in this domain. Metasurfaces are arrays of subwavelength-spaced and optically thin optical elements, which enable new physics and phenomena that are distinctly different from those observed in three-dimensional bulk metamaterials. We present here our recent activities and achievements in relation with the design of metasurfaces, which are concerned with two topics: on one hand, we study numerical characterization approaches that are well suited to the multiscale nature of metasurfaces; on the other hand, we develop inverse design strategies for discovering non-classical metasurface configurations for a target optical functionality. These two topics are addressed in the context of a multidisciplinary collaborative project, which involve computational scientists and physicists. In particular, we apply the proposed numerical methodologies to the design of phase gradient metasurfaces and light front shaping metalenses. In some cases, the numerically designed metasurfaces have been frabricated and experimentally characterized to confirm their predicted performances.
{"title":"Advanced Numerical Modeling Methods for the Characterization and Optimization of Metasurfaces","authors":"M. Binois, R. Duvigneau, M. Elsawy, P. Genevet, Samira Kadhir, St'ephane Lanteri, Nicolas Lebbe","doi":"10.23919/AT-AP-RASC54737.2022.9814395","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814395","url":null,"abstract":"The last 10 years have witnessed an impressive amount of works aiming at the development of thin metamaterials for controlling the wavefront of light, and thus realize planar photonics also referred as flat optics or metaoptics. The concept of metasurface is at the heart of almost all the discoveries in this domain. Metasurfaces are arrays of subwavelength-spaced and optically thin optical elements, which enable new physics and phenomena that are distinctly different from those observed in three-dimensional bulk metamaterials. We present here our recent activities and achievements in relation with the design of metasurfaces, which are concerned with two topics: on one hand, we study numerical characterization approaches that are well suited to the multiscale nature of metasurfaces; on the other hand, we develop inverse design strategies for discovering non-classical metasurface configurations for a target optical functionality. These two topics are addressed in the context of a multidisciplinary collaborative project, which involve computational scientists and physicists. In particular, we apply the proposed numerical methodologies to the design of phase gradient metasurfaces and light front shaping metalenses. In some cases, the numerically designed metasurfaces have been frabricated and experimentally characterized to confirm their predicted performances.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125806830","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814259
Giorgos Kokkinis, Z. Zaharis, P. Lazaridis, N. Kantartzis
In this paper, an effort is made to solve the direction of arrival (DoA) estimation problem by constructing a convolutional neural network (CNN) architecture, which estimates the angles of arrival of the incoming source signals received by a uniform linear array (ULA) antenna. The input of the CNN is the sampled correlation matrix of the signals, while the the output is a pool of the highest probabilities of the network’s estimated values. The problem is modeled as a multi-label classification task, meaning that the space of angles is divided into a grid of multiple classes. To model the problem in this way, we assume that we cannot have two or more signals coming from the same angle. This also allows us to further increase the quality of our predictions, meaning that we can set an a priori minimum distance between each given output. In this way we can filter out duplicate outputs and have the desired result.
{"title":"Direction of Arrival Estimation Applied to Antenna Arrays using Convolutional Neural Networks","authors":"Giorgos Kokkinis, Z. Zaharis, P. Lazaridis, N. Kantartzis","doi":"10.23919/AT-AP-RASC54737.2022.9814259","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814259","url":null,"abstract":"In this paper, an effort is made to solve the direction of arrival (DoA) estimation problem by constructing a convolutional neural network (CNN) architecture, which estimates the angles of arrival of the incoming source signals received by a uniform linear array (ULA) antenna. The input of the CNN is the sampled correlation matrix of the signals, while the the output is a pool of the highest probabilities of the network’s estimated values. The problem is modeled as a multi-label classification task, meaning that the space of angles is divided into a grid of multiple classes. To model the problem in this way, we assume that we cannot have two or more signals coming from the same angle. This also allows us to further increase the quality of our predictions, meaning that we can set an a priori minimum distance between each given output. In this way we can filter out duplicate outputs and have the desired result.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125844463","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814362
Devojyoti Kansabanik, D. Oberoi, Surajit Mondal
Magnetic field couples the solar interior to the solar atmosphere, known as corona. Coronal magnetic field is one of the crucial parameters which determines the coronal structures and regulates the space weather phenomena like flares, coronal mass ejections, energetic particle events and solar winds [1], [18]. Measuring the magnetic field at middle and higher coronal heights are extremely difficult problem and to date there is no single measurement technique available to measure the higher coronal magnetic fields routinely. polarization measurements of the low-frequency radio emissions are an ideal tool to probe the coronal magnetic fields at higher coronal heights (> 1R⊙). Till date most of the low-frequency polarization observations of the Sun were limited to bright solar radio bursts. Here we developed a novel algorithm for performing precise polarization calibration of the solar observations done with Murchison Widefield Array, a future Square Kilometer Array (SKA) precursor. We have brought down the instrumental polarization < 1%. We anticipate this method will allow us to detect very low level polarised emissions from coronal thermal emissions, which will become a tool for routine measurements of global coronal magnetic field at higher coronal heights. This method can be easily adopted for future SKA and open a window of new discoveries using high fidelity spectro-polarimetric snapshot imaging of the Sun at low radio frequencies.
{"title":"A novel algorithm for high fidelity spectro-polarimetric snapshot imaging of the low-frequency radio Sun using SKA-low precursor","authors":"Devojyoti Kansabanik, D. Oberoi, Surajit Mondal","doi":"10.23919/AT-AP-RASC54737.2022.9814362","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814362","url":null,"abstract":"Magnetic field couples the solar interior to the solar atmosphere, known as corona. Coronal magnetic field is one of the crucial parameters which determines the coronal structures and regulates the space weather phenomena like flares, coronal mass ejections, energetic particle events and solar winds [1], [18]. Measuring the magnetic field at middle and higher coronal heights are extremely difficult problem and to date there is no single measurement technique available to measure the higher coronal magnetic fields routinely. polarization measurements of the low-frequency radio emissions are an ideal tool to probe the coronal magnetic fields at higher coronal heights (> 1R⊙). Till date most of the low-frequency polarization observations of the Sun were limited to bright solar radio bursts. Here we developed a novel algorithm for performing precise polarization calibration of the solar observations done with Murchison Widefield Array, a future Square Kilometer Array (SKA) precursor. We have brought down the instrumental polarization < 1%. We anticipate this method will allow us to detect very low level polarised emissions from coronal thermal emissions, which will become a tool for routine measurements of global coronal magnetic field at higher coronal heights. This method can be easily adopted for future SKA and open a window of new discoveries using high fidelity spectro-polarimetric snapshot imaging of the Sun at low radio frequencies.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126018012","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814279
V. Prayag, G. Hellbourg, M. Virgin
The DSA-2000 radio telescope is currently being designed to become the fastest and most sensitive astronomical survey instrument. An important factor in this design is the future Radio Frequency Interference (RFI) environment of the telescope. A careful site selection and RFI risks assessment are important to ensure that the specifications of the telescope are met. To this end, a mobile RFI survey station has been developed to provide an accurate picture of the RFI environment of a candidate telescope site. This paper presents this monitoring station and preliminary results captured at the Owens Valley Radio Observatory.
{"title":"Design of a mobile RFI monitoring station for DSA-2000 candidate sites surveys","authors":"V. Prayag, G. Hellbourg, M. Virgin","doi":"10.23919/AT-AP-RASC54737.2022.9814279","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814279","url":null,"abstract":"The DSA-2000 radio telescope is currently being designed to become the fastest and most sensitive astronomical survey instrument. An important factor in this design is the future Radio Frequency Interference (RFI) environment of the telescope. A careful site selection and RFI risks assessment are important to ensure that the specifications of the telescope are met. To this end, a mobile RFI survey station has been developed to provide an accurate picture of the RFI environment of a candidate telescope site. This paper presents this monitoring station and preliminary results captured at the Owens Valley Radio Observatory.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114229298","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814435
Georgios Kougioumtzidis, V. Poulkov, Z. Zaharis, P. Lazaridis
The open radio access network (O-RAN) concept refers to the architectural design of next generation RAN that is built on the principles of openness and intelligence. This paper presents an overview of the concept of O-RAN, by analyzing its architecture and examining its main building blocks. Moreover, it highlights the significance of quality of experience (QoE) for the envisioned future wireless networks, and analyzes the importance of integrating QoE-awareness in O-RAN’s design. Furthermore, it provides an analysis of the methodology of embedding artificial intelligence models in O-RAN’s architecture with the form of xApps.
{"title":"Intelligent and QoE-aware Open Radio Access Networks","authors":"Georgios Kougioumtzidis, V. Poulkov, Z. Zaharis, P. Lazaridis","doi":"10.23919/AT-AP-RASC54737.2022.9814435","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814435","url":null,"abstract":"The open radio access network (O-RAN) concept refers to the architectural design of next generation RAN that is built on the principles of openness and intelligence. This paper presents an overview of the concept of O-RAN, by analyzing its architecture and examining its main building blocks. Moreover, it highlights the significance of quality of experience (QoE) for the envisioned future wireless networks, and analyzes the importance of integrating QoE-awareness in O-RAN’s design. Furthermore, it provides an analysis of the methodology of embedding artificial intelligence models in O-RAN’s architecture with the form of xApps.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126218187","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814202
A. Lee, Jin Seo Park, Hyung-Do Choi
The surface model of a rhesus monkey in the Visible Monkey project of Korea had been implemented. However, the posture of the monkey model is very different from that of a live monkey because the original images were obtained in a supine position. Therefore, the monkey models in walking and sitting postures, close to those of a live monkey were realized. This paper presents the SAR results calculated for the monkey model in a walking posture exposed to electromagnetic fields in a reverberation chamber.
{"title":"A Rhesus Monkey Model and WBA SAR","authors":"A. Lee, Jin Seo Park, Hyung-Do Choi","doi":"10.23919/AT-AP-RASC54737.2022.9814202","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814202","url":null,"abstract":"The surface model of a rhesus monkey in the Visible Monkey project of Korea had been implemented. However, the posture of the monkey model is very different from that of a live monkey because the original images were obtained in a supine position. Therefore, the monkey models in walking and sitting postures, close to those of a live monkey were realized. This paper presents the SAR results calculated for the monkey model in a walking posture exposed to electromagnetic fields in a reverberation chamber.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121107693","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814364
O. Fiser, M. Kovalchuk
In our paper we deal with the generalized method of frequency scaling. From the attenuation known at one frequency, we determine the rain rate by the inverse procedure of any rain attenuation prediction model, which we then use to estimate the rain attenuation on another frequency. We compare the results on one hand with exact values, on the other hand with the results after the ITU-R frequency scaling method. The method proposed by us seems to be more accurate at the level of instantaneous frequency scaling and also at the level of the attenuation distribution function.
{"title":"On Frequency Scaling of Rain Attenuation","authors":"O. Fiser, M. Kovalchuk","doi":"10.23919/AT-AP-RASC54737.2022.9814364","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814364","url":null,"abstract":"In our paper we deal with the generalized method of frequency scaling. From the attenuation known at one frequency, we determine the rain rate by the inverse procedure of any rain attenuation prediction model, which we then use to estimate the rain attenuation on another frequency. We compare the results on one hand with exact values, on the other hand with the results after the ITU-R frequency scaling method. The method proposed by us seems to be more accurate at the level of instantaneous frequency scaling and also at the level of the attenuation distribution function.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126275715","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 : 2022-05-29DOI: 10.23919/AT-AP-RASC54737.2022.9814225
M. Messerotti
Space Weather perturbations are originated by a variety of plasma processes, whose signatures are observable in the radio spectrum. The interpretation of these signatures to infer the physics at the sources is a fundamental requirement in developing Space Weather science and operation models. Hence, the advancement both of radio observation techniques and radio emission and propagation modelling is a must. A step to achieve this goal cannot be separated from the availability of a collaborative approach for data and model sharing and reviewing.
{"title":"Advancing Radio Diagnostics of Space Weather Plasma Processes","authors":"M. Messerotti","doi":"10.23919/AT-AP-RASC54737.2022.9814225","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814225","url":null,"abstract":"Space Weather perturbations are originated by a variety of plasma processes, whose signatures are observable in the radio spectrum. The interpretation of these signatures to infer the physics at the sources is a fundamental requirement in developing Space Weather science and operation models. Hence, the advancement both of radio observation techniques and radio emission and propagation modelling is a must. A step to achieve this goal cannot be separated from the availability of a collaborative approach for data and model sharing and reviewing.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126509680","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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