Pub Date : 2013-12-01DOI: 10.1109/ICMAP.2013.6733465
A. Tripathi, B. K. Singh
This paper presents the analysis of simple, compact, CPW- fed monopole aperture antenna with 10dB return loss (VSWR<;2) band from 8 GHz to 12GHz for X-band applications. The antenna includes ground plane, rectangular slot and a crossed rectangular exciting stub. The antenna is very simple and easy to fabricate. The proposed antenna is designed on an inexpensive FR4_Epoxy substrate with dielectric constant of εr =4.4 and with the size of 30mm×25mm×1.5mm The fundamental parameters of the antenna such as bandwidth return loss, radiation pattern, and gain are obtained All justifies the acceptable antenna standards. Simulation tool, based on the finite element method (HFSS V 13.0) has been used to analyze and optimize the proposed antenna Antenna is applicable for radar and satellite communication system It covers complete X-band (8-12) GHz and having the efficiency of 97%.
本文介绍了一种简单、紧凑、在8ghz到12GHz频段上具有10dB回波损耗(VSWR< 2)的CPW馈电单极孔径天线，用于x波段应用。天线包括接地面、矩形槽和交叉矩形激励短段。该天线非常简单，易于制造。该天线设计在介电常数εr =4.4、尺寸为30mm×25mm×1.5mm的廉价FR4_Epoxy基板上，得到了天线的带宽回波损耗、辐射方向图和增益等基本参数，均符合可接受的天线标准。采用有限元仿真工具(HFSS V 13.0)对所提出的天线进行了分析和优化，该天线适用于雷达和卫星通信系统，覆盖了整个x波段(8-12)GHz，效率为97%。
{"title":"A CPW fed X-Band antenna for satellite & radar applications","authors":"A. Tripathi, B. K. Singh","doi":"10.1109/ICMAP.2013.6733465","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733465","url":null,"abstract":"This paper presents the analysis of simple, compact, CPW- fed monopole aperture antenna with 10dB return loss (VSWR<;2) band from 8 GHz to 12GHz for X-band applications. The antenna includes ground plane, rectangular slot and a crossed rectangular exciting stub. The antenna is very simple and easy to fabricate. The proposed antenna is designed on an inexpensive FR4_Epoxy substrate with dielectric constant of εr =4.4 and with the size of 30mm×25mm×1.5mm The fundamental parameters of the antenna such as bandwidth return loss, radiation pattern, and gain are obtained All justifies the acceptable antenna standards. Simulation tool, based on the finite element method (HFSS V 13.0) has been used to analyze and optimize the proposed antenna Antenna is applicable for radar and satellite communication system It covers complete X-band (8-12) GHz and having the efficiency of 97%.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125018610","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733476
Rohit Kumar Saini, S. Dwari
In this paper a rectangular slot antenna fed by coplanar waveguide (CPW) with circular shaped tuning stub for broadband circular polarization is presented. Two circular metallic arcs shaped grounded perturbation are introduced at diagonally opposite corners of the rectangular slot to obtain circular polarization with wide axial ratio bandwidth. This slot antenna has been designed and optimized on a FR4 substrate with dielectric constant εr= 4.3 and substrate thickness h=1.53mm. The simulated results of this antenna show impedance bandwidth 151.64% from frequency range 1.93GHz to 14.06GHz at VSWR ≤ 2 throughout this band and axial ratio band width 32.68% from frequency range 3.7GHz to 5.14GHz. The simulated radiation patterns of this antenna are Omni-directional in H-plane and Bi-directional in E-plane. The effect of variation in radius of metallic arcs on impedance bandwidth and axial ratio bandwidth has also been analyzed using HFSS Simulator. The proposed antenna can be easily integrated with radio-frequency/ Microwave Circuitry with low manufacturing cost.
{"title":"CPW-fed broadband circularly polarized microstrip rectangular slot antenna with circular shaped tuning stub","authors":"Rohit Kumar Saini, S. Dwari","doi":"10.1109/ICMAP.2013.6733476","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733476","url":null,"abstract":"In this paper a rectangular slot antenna fed by coplanar waveguide (CPW) with circular shaped tuning stub for broadband circular polarization is presented. Two circular metallic arcs shaped grounded perturbation are introduced at diagonally opposite corners of the rectangular slot to obtain circular polarization with wide axial ratio bandwidth. This slot antenna has been designed and optimized on a FR4 substrate with dielectric constant εr= 4.3 and substrate thickness h=1.53mm. The simulated results of this antenna show impedance bandwidth 151.64% from frequency range 1.93GHz to 14.06GHz at VSWR ≤ 2 throughout this band and axial ratio band width 32.68% from frequency range 3.7GHz to 5.14GHz. The simulated radiation patterns of this antenna are Omni-directional in H-plane and Bi-directional in E-plane. The effect of variation in radius of metallic arcs on impedance bandwidth and axial ratio bandwidth has also been analyzed using HFSS Simulator. The proposed antenna can be easily integrated with radio-frequency/ Microwave Circuitry with low manufacturing cost.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125864956","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733451
A. Mickelson
The ultimate goal of nonlinear optics has been all-optical systems in which processing (logic) functions work in tandem with interconnections to carry out processing without electrical conversion. Laser-based nonlinear optics was already demonstrated in the 1961 [1], only months after the 1960 demonstration of the ruby laser [2]. Nonlinear optics has a rich history extending to the present. The reality of nonlinear optics is that electronic based nonlinearities are fast (subpicosecond) but require large electromagnetic fields. Plasmonics and strongly guiding optics (in the present case, silicon photonics) promise nanometric confinement and even guidance of intense optical fields over significant (many wavelength) distances. The optical field enhancement that can be obtained by strong guidance can be sufficient to achieve the magnitudes necessary for nonlinear optics with compact (chip-level) sources.
{"title":"Silicon photonic slot guides for nonlinear optics","authors":"A. Mickelson","doi":"10.1109/ICMAP.2013.6733451","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733451","url":null,"abstract":"The ultimate goal of nonlinear optics has been all-optical systems in which processing (logic) functions work in tandem with interconnections to carry out processing without electrical conversion. Laser-based nonlinear optics was already demonstrated in the 1961 [1], only months after the 1960 demonstration of the ruby laser [2]. Nonlinear optics has a rich history extending to the present. The reality of nonlinear optics is that electronic based nonlinearities are fast (subpicosecond) but require large electromagnetic fields. Plasmonics and strongly guiding optics (in the present case, silicon photonics) promise nanometric confinement and even guidance of intense optical fields over significant (many wavelength) distances. The optical field enhancement that can be obtained by strong guidance can be sufficient to achieve the magnitudes necessary for nonlinear optics with compact (chip-level) sources.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122711848","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733520
V. Priye, A. Mickelson
Multiple scale analysis of slot waveguide electrooptic modulator of few nanometer width and lower refractive index than the adjacent waveguides is presented for the first time to predict phase modulation due to variation in the refractive index in the slot by application of external voltage. The effect of different electrooptic coefficient pertaining to diverse polymers on voltage required for π phase change is investigated. Phase modulation and corresponding intensity modulation for practical waveguide configuration is theoretically demonstrated.
{"title":"Multiple scale analysis of low index subwavelength slot waveguide electrooptic modulator","authors":"V. Priye, A. Mickelson","doi":"10.1109/ICMAP.2013.6733520","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733520","url":null,"abstract":"Multiple scale analysis of slot waveguide electrooptic modulator of few nanometer width and lower refractive index than the adjacent waveguides is presented for the first time to predict phase modulation due to variation in the refractive index in the slot by application of external voltage. The effect of different electrooptic coefficient pertaining to diverse polymers on voltage required for π phase change is investigated. Phase modulation and corresponding intensity modulation for practical waveguide configuration is theoretically demonstrated.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122997697","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733473
L. Murmu, G. Singh, Sushrut Das
A novel dual-mode hexagonal loop resonator bandpass filter with a step impedance open-end stub perturbation is proposed along with possible applications. It is shown that different responses can be realized using only a single dual-mode resonator by changing the parameters of the perturbation. As compared to rectangle and square counterparts the interior angles are large in hexagonal geometry which promises better confinement in the microstrip circuits. The structure is very simple, easy to fabricate and useful for communication system.
{"title":"Hexagonal bandpass filter using open end step impedance stub perturbation","authors":"L. Murmu, G. Singh, Sushrut Das","doi":"10.1109/ICMAP.2013.6733473","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733473","url":null,"abstract":"A novel dual-mode hexagonal loop resonator bandpass filter with a step impedance open-end stub perturbation is proposed along with possible applications. It is shown that different responses can be realized using only a single dual-mode resonator by changing the parameters of the perturbation. As compared to rectangle and square counterparts the interior angles are large in hexagonal geometry which promises better confinement in the microstrip circuits. The structure is very simple, easy to fabricate and useful for communication system.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128248856","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733547
Riya Dey, A. Pandey, V. K. Rai
The frequency upconversion emission from Er3+-Yb3+ codoped Y2O3 phosphor synthesized by low temperature, urea assisted combustion technique has been studied upon excitation at 980 nm diode laser. The effect of incorporation of Zn2+ ion on upconversion (UC) emission bands around 409 nm, 523 nm, 551 nm, 661 nm arises due to the transitions 2H9/2 → 4I15/2, 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2 of Er3+ ions have been investigated. The basic mechanism involved in UC process and reason of intensity enhancement on Zn2+ codoping have been explained by energy level structure and decay time analyses. The present study indicates that the developed phosphors may be of significant interest for use in photonic applications.
{"title":"Effect of codoping of Zn2+ ion on the upconversion of Er3+-Yb3+ codoped Y2O3 phosphor","authors":"Riya Dey, A. Pandey, V. K. Rai","doi":"10.1109/ICMAP.2013.6733547","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733547","url":null,"abstract":"The frequency upconversion emission from Er<sup>3+</sup>-Yb<sup>3+</sup> codoped Y<sub>2</sub>O<sub>3</sub> phosphor synthesized by low temperature, urea assisted combustion technique has been studied upon excitation at 980 nm diode laser. The effect of incorporation of Zn<sup>2+</sup> ion on upconversion (UC) emission bands around 409 nm, 523 nm, 551 nm, 661 nm arises due to the transitions <sup>2</sup>H<sub>9/2</sub> → <sup>4</sup>I<sub>15/2</sub>, <sup>2</sup>H<sub>11/2</sub> → <sup>4</sup>I<sub>15/2</sub>, <sup>4</sup>S<sub>3/2</sub> → <sup>4</sup>I<sub>15/2</sub> and <sup>4</sup>F<sub>9/2</sub> → <sup>4</sup>I<sub>15/2</sub> of Er<sup>3+</sup> ions have been investigated. The basic mechanism involved in UC process and reason of intensity enhancement on Zn<sup>2+</sup> codoping have been explained by energy level structure and decay time analyses. The present study indicates that the developed phosphors may be of significant interest for use in photonic applications.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129159426","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733495
Abhishek Sharma, B. Kanaujia, Sachin Kumar
A compact circular microstrip antenna loaded with T-shaped slot is presented. The same antenna is then enclosed in a metallic cavity to achieve further compactness. A 50% compactness is achieved using cavity backed configuration when compared with conventional circular microstrip antenna. Alternatively, miniaturization is also achieved by employing symmetry with respect to the feed-axis and using only half of the antenna configuration. The effect of notch and slot length on the resonant frequency is also investigated and observed that the resonant frequency of the antenna can be varied simply by varying either the notch length or the slot length.
{"title":"Compact microstrip antenna loaded with T-shaped slots","authors":"Abhishek Sharma, B. Kanaujia, Sachin Kumar","doi":"10.1109/ICMAP.2013.6733495","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733495","url":null,"abstract":"A compact circular microstrip antenna loaded with T-shaped slot is presented. The same antenna is then enclosed in a metallic cavity to achieve further compactness. A 50% compactness is achieved using cavity backed configuration when compared with conventional circular microstrip antenna. Alternatively, miniaturization is also achieved by employing symmetry with respect to the feed-axis and using only half of the antenna configuration. The effect of notch and slot length on the resonant frequency is also investigated and observed that the resonant frequency of the antenna can be varied simply by varying either the notch length or the slot length.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130154244","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733510
J. Andrews, V. Mathew
The microwave propagation through a High Temperature Superconducting (HTS) Coplanar Waveguide (CPW) exposed to a magnetic field is simulated for a wide range of temperature, applied field and transmission line geometry. The magnetic field effects of a HTS coplanar waveguide is studied using the modified two-fluid model proposed by Coffey and Clem (CC). The surface impedance of the high temperature superconducting strip is determined using the CC model. This enters as the complex valued resistive boundary condition and by using the Galerkin's procedure, we study the propagation parameters and the unloaded Q value of the coplanar waveguide. The spectral domain dyadic Green's functions for the transmission line are formulated by treating coplanar waveguide as a coupled slotline. The results are in tune with the vortex dynamics explored by CC model. The simulation of transmission characteristics of the coplanar waveguide in the microdimensions shows lower dispersion and attenuation. The variations in signal transmission are explained using the vortex effects.
{"title":"Modeling of High Temperature Superconducting Coplanar Waveguides for microwave propagation under a magnetic field","authors":"J. Andrews, V. Mathew","doi":"10.1109/ICMAP.2013.6733510","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733510","url":null,"abstract":"The microwave propagation through a High Temperature Superconducting (HTS) Coplanar Waveguide (CPW) exposed to a magnetic field is simulated for a wide range of temperature, applied field and transmission line geometry. The magnetic field effects of a HTS coplanar waveguide is studied using the modified two-fluid model proposed by Coffey and Clem (CC). The surface impedance of the high temperature superconducting strip is determined using the CC model. This enters as the complex valued resistive boundary condition and by using the Galerkin's procedure, we study the propagation parameters and the unloaded Q value of the coplanar waveguide. The spectral domain dyadic Green's functions for the transmission line are formulated by treating coplanar waveguide as a coupled slotline. The results are in tune with the vortex dynamics explored by CC model. The simulation of transmission characteristics of the coplanar waveguide in the microdimensions shows lower dispersion and attenuation. The variations in signal transmission are explained using the vortex effects.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127002282","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733459
S. Chatterjee, D. R. Poddar, Arijit Majumder
A design of eight element end fed asymmetric iris excited centered slotted array antenna is presented in this paper. Mutual coupling effect is corrected by detuning the array elements within its dynamic range, relative to iris design parameters. Improved optimized design proposes -33.53dB of first side lobe level at design frequency of 10GHz and 14.90dB gain is observed. Relative magnitude of field distribution on slot surfaces and corresponding radiated power is also reported as a consequence of optimized design parameter.
{"title":"End fed iris excited centered slotted array antenna design with mutual coupling correction","authors":"S. Chatterjee, D. R. Poddar, Arijit Majumder","doi":"10.1109/ICMAP.2013.6733459","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733459","url":null,"abstract":"A design of eight element end fed asymmetric iris excited centered slotted array antenna is presented in this paper. Mutual coupling effect is corrected by detuning the array elements within its dynamic range, relative to iris design parameters. Improved optimized design proposes -33.53dB of first side lobe level at design frequency of 10GHz and 14.90dB gain is observed. Relative magnitude of field distribution on slot surfaces and corresponding radiated power is also reported as a consequence of optimized design parameter.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114211149","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 : 2013-12-01DOI: 10.1109/ICMAP.2013.6733486
L. Pappula, D. Ghosh
This paper discusses the application of nature-inspired optimization techniques for the synthesis of large arrays of antennas. Here the technique of Invasive Weed Optimization (IWO) is chosen for the optimization of the amplitude and/or phase of the excitation at the individual elements of the array. The result of such optimization is performance improvement of the array in terms of minimization of sidelobe levels (SLL) and positioning of nulls at desired locations as compared to the uniformly excited linear array. It is seen that even large arrays of 100 elements can be effectively synthesized using this proposed algorithm.
{"title":"Large array synthesis using Invasive Weed Optimization","authors":"L. Pappula, D. Ghosh","doi":"10.1109/ICMAP.2013.6733486","DOIUrl":"https://doi.org/10.1109/ICMAP.2013.6733486","url":null,"abstract":"This paper discusses the application of nature-inspired optimization techniques for the synthesis of large arrays of antennas. Here the technique of Invasive Weed Optimization (IWO) is chosen for the optimization of the amplitude and/or phase of the excitation at the individual elements of the array. The result of such optimization is performance improvement of the array in terms of minimization of sidelobe levels (SLL) and positioning of nulls at desired locations as compared to the uniformly excited linear array. It is seen that even large arrays of 100 elements can be effectively synthesized using this proposed algorithm.","PeriodicalId":286435,"journal":{"name":"2013 International Conference on Microwave and Photonics (ICMAP)","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125795407","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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