Pub Date : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708132
Anuradha Verma, Deepika Gupta, P. Sharma
In this paper, we consider a hybrid satellite-aerial-terrestrial network (HSATN) where the dual-hop communication from a satellite to ground user equipment (UE) is aided by a static aerial relay in the presence of interference. Specifically, we consider multiple high altitude platforms (HAPs) located in a 3-dimensional spherical sector above the surface of earth as interferers to the aerial relay. Further, we consider a single low altitude platform (LAP) located in a cylindrical terrestrial small cell to which act as an interferer to ground UE. By assuming the shadowed-Rician fading for satellite/HAPs links, the Rician fading for aerial relay link, and Nakagami-m fading for LAP link, we derive the outage probability (OP) of first and second hops as well as the end-to-end satellite to ground UE transmissions. Further, we depict the impact of underlying system parameters on the OP of considered HSATN. We verify our analytical results through simulations.
{"title":"Outage Performance of Hybrid Satellite-Aerial-Terrestrial Networks in the Presence of Interference","authors":"Anuradha Verma, Deepika Gupta, P. Sharma","doi":"10.1109/ACTS53447.2021.9708132","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708132","url":null,"abstract":"In this paper, we consider a hybrid satellite-aerial-terrestrial network (HSATN) where the dual-hop communication from a satellite to ground user equipment (UE) is aided by a static aerial relay in the presence of interference. Specifically, we consider multiple high altitude platforms (HAPs) located in a 3-dimensional spherical sector above the surface of earth as interferers to the aerial relay. Further, we consider a single low altitude platform (LAP) located in a cylindrical terrestrial small cell to which act as an interferer to ground UE. By assuming the shadowed-Rician fading for satellite/HAPs links, the Rician fading for aerial relay link, and Nakagami-m fading for LAP link, we derive the outage probability (OP) of first and second hops as well as the end-to-end satellite to ground UE transmissions. Further, we depict the impact of underlying system parameters on the OP of considered HSATN. We verify our analytical results through simulations.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115030256","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708216
Adyasa Priyadarsini Acharya, T. K. Das
This research paper describes the design of a modified tree-fractal antenna intended for RFID reader applications. The proposed planar antenna is linearly polarized and comprise of a tree-fractal shaped monopole radiator with a filleted ground plane. Simulation results indicate that the planar antenna exhibit a wider bandwidth (3.98 GHz – 8.6 GHz) with an omnidirectional radiation pattern. The overall dimension of the design i.e. 0.46λ × 0.36λ × 0.015λ (λ = wavelength at lowest cutoff frequency) shows that the proposed design is compact related to previously reported designs. With a peak realized gain of 3.6 dBi, the tree-fractal antenna is suitable for short-range RFID reader applications.
{"title":"Design of a Modified Tree-fractal Antenna for RFID Reader Applications","authors":"Adyasa Priyadarsini Acharya, T. K. Das","doi":"10.1109/ACTS53447.2021.9708216","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708216","url":null,"abstract":"This research paper describes the design of a modified tree-fractal antenna intended for RFID reader applications. The proposed planar antenna is linearly polarized and comprise of a tree-fractal shaped monopole radiator with a filleted ground plane. Simulation results indicate that the planar antenna exhibit a wider bandwidth (3.98 GHz – 8.6 GHz) with an omnidirectional radiation pattern. The overall dimension of the design i.e. 0.46λ × 0.36λ × 0.015λ (λ = wavelength at lowest cutoff frequency) shows that the proposed design is compact related to previously reported designs. With a peak realized gain of 3.6 dBi, the tree-fractal antenna is suitable for short-range RFID reader applications.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115705337","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708135
K. N. Kumar, Shekhar Singh, P. M. Pradhan
In this paper, a hybrid index and number modulation (HINM) technique is proposed for enhancing energy efficiency and spectrum efficiency of orthogonal frequency division multiplexing (OFDM) system. It transmits additional data bits by varying the number of activated subcarriers and the indices of activated subcarriers with in an OFDM sub-block. A low complexity threshold based detector is also proposed which detects the subcarrier activation pattern, decodes information bits and demodulate the pulse amplitude modulation symbols. The bit error rate and spectral efficiency of the proposed OFDM-HINM scheme are analyzed using Monte Carlo simulation study. The proposed OFDM-HINM scheme offers lower bit error rate and higher throughput in comparison to OFDM-index modulation, OFDM-subcarrier number modulation, and classical OFDM with equivalent spectral efficiency and power at mid to high signal to noise ratio.
{"title":"Development of a Hybrid Index and Number Modulation Scheme for OFDM Systems","authors":"K. N. Kumar, Shekhar Singh, P. M. Pradhan","doi":"10.1109/ACTS53447.2021.9708135","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708135","url":null,"abstract":"In this paper, a hybrid index and number modulation (HINM) technique is proposed for enhancing energy efficiency and spectrum efficiency of orthogonal frequency division multiplexing (OFDM) system. It transmits additional data bits by varying the number of activated subcarriers and the indices of activated subcarriers with in an OFDM sub-block. A low complexity threshold based detector is also proposed which detects the subcarrier activation pattern, decodes information bits and demodulate the pulse amplitude modulation symbols. The bit error rate and spectral efficiency of the proposed OFDM-HINM scheme are analyzed using Monte Carlo simulation study. The proposed OFDM-HINM scheme offers lower bit error rate and higher throughput in comparison to OFDM-index modulation, OFDM-subcarrier number modulation, and classical OFDM with equivalent spectral efficiency and power at mid to high signal to noise ratio.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116160066","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708073
H. Senapati, Prasun Chongder, K. K. Ajith, S. Maiti
Ground penetrating radar (GPR) being an ultrawide band (UWB) radar system, antenna plays a vital role in optimizing its RF transceiver performance. Bowtie antenna is very popularly used in GPR applications as it can satisfy the stringent requirements of a UWB antenna. This paper presents the design of a UWB bow-tie antenna satisfying wide band width of 450MHz to 2.3GHz without dissipative loading. The simulation has been carried out in HFSS v17, and the antenna has been fabricated and tested to verify the desired performance. The proposed antenna can be used for the UWB GPR system for the detection of buried objects.
{"title":"Design Of UWB Bow Tie Antenna For GPR Object Detection","authors":"H. Senapati, Prasun Chongder, K. K. Ajith, S. Maiti","doi":"10.1109/ACTS53447.2021.9708073","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708073","url":null,"abstract":"Ground penetrating radar (GPR) being an ultrawide band (UWB) radar system, antenna plays a vital role in optimizing its RF transceiver performance. Bowtie antenna is very popularly used in GPR applications as it can satisfy the stringent requirements of a UWB antenna. This paper presents the design of a UWB bow-tie antenna satisfying wide band width of 450MHz to 2.3GHz without dissipative loading. The simulation has been carried out in HFSS v17, and the antenna has been fabricated and tested to verify the desired performance. The proposed antenna can be used for the UWB GPR system for the detection of buried objects.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116744579","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708139
D. Konhar, A. Behera, S. Mishra, D. Mishra
In this paper, a CPW-fed sectoral antenna is presented with a modified ground plane. The proposed antenna is compact with a size 15 × 12 × 0.8 mm3. Later, using T and curved Y-shaped strips WLAN (4.82 GHz ~ 5.22 GHz) and WiMAX (3.38 GHz ~ 4.08 GHz) bands are rejected. In both notch bands VSWR >>2 is observed. Parametric analysis is done to know the effect of strips used for band notch operation. An empirical formula relating to notch frequency and strip length is suggested. Ansys HFSS V.20 is used to design the proposed antenna.
{"title":"A compact sectoral antenna with Dual band-reject characteristic using T- and Y-shaped strip","authors":"D. Konhar, A. Behera, S. Mishra, D. Mishra","doi":"10.1109/ACTS53447.2021.9708139","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708139","url":null,"abstract":"In this paper, a CPW-fed sectoral antenna is presented with a modified ground plane. The proposed antenna is compact with a size 15 × 12 × 0.8 mm3. Later, using T and curved Y-shaped strips WLAN (4.82 GHz ~ 5.22 GHz) and WiMAX (3.38 GHz ~ 4.08 GHz) bands are rejected. In both notch bands VSWR >>2 is observed. Parametric analysis is done to know the effect of strips used for band notch operation. An empirical formula relating to notch frequency and strip length is suggested. Ansys HFSS V.20 is used to design the proposed antenna.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132968776","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708354
Bidyut Jyoti Boruah, A. K. Talukdar, K. K. Sarma
A hand gesture recognition system is a natural and simple way of communicating in today’s world. The development of teaching methods by using technology-dependent useful items to increase communication and interaction between the teacher and the student is a major part of today’s e-learning. In this paper, we have proposed an interactive learning-aid tool based on a vision-based hand gesture recognition system. The system uses MediaPipe for hand gesture recognition. The recognized hand gestures use a virtual-mouse-based object controlling system to control various virtual objects created using Unity. The system has been tested using six hand gestures and it is found that the system can be used effectively for controlling various virtual objects.
{"title":"Development of a Learning-aid tool using Hand Gesture Based Human Computer Interaction System","authors":"Bidyut Jyoti Boruah, A. K. Talukdar, K. K. Sarma","doi":"10.1109/ACTS53447.2021.9708354","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708354","url":null,"abstract":"A hand gesture recognition system is a natural and simple way of communicating in today’s world. The development of teaching methods by using technology-dependent useful items to increase communication and interaction between the teacher and the student is a major part of today’s e-learning. In this paper, we have proposed an interactive learning-aid tool based on a vision-based hand gesture recognition system. The system uses MediaPipe for hand gesture recognition. The recognized hand gestures use a virtual-mouse-based object controlling system to control various virtual objects created using Unity. The system has been tested using six hand gestures and it is found that the system can be used effectively for controlling various virtual objects.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121836928","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708111
Aneeta Christopher, R. Harikishan, P. Sudeep
Recently, deep learning methods are employed for image restoration tasks. An unsupervised learning technique is appropriate for many real time applications due to the scarcity of a large amount of data for training. The conventional deep image prior (DIP) is a CNN based denoiser prior that perform different image restoration tasks by using only a single degraded image. Alternating Direction Method of Multipliers (ADMM) framework over a standard sub-gradient method has already been proposed with DIP method. Inspired by this, we propose a variant of ADMM-DIP method for enhancing single coil magnitude magnetic resonance (MR) images. It is well known that the noise distribution in single coil magnitude MR images is stationary Rician. We achieve the Rician noise removal from single MR image by utilizing the combined effect of MSE, KL divergence and perceptual loss functions. Also, the attention guided dense upsampling network (AUNet) was engaged as the CNN denoiser prior. Our experiments on simulated MR images indicate a better performance of the proposed method. We evaluated different denoising methods both qualitatively and quantitatively.
{"title":"ADMM based Deep Denoiser Prior for Enhancing Single Coil Magnitude MR images","authors":"Aneeta Christopher, R. Harikishan, P. Sudeep","doi":"10.1109/ACTS53447.2021.9708111","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708111","url":null,"abstract":"Recently, deep learning methods are employed for image restoration tasks. An unsupervised learning technique is appropriate for many real time applications due to the scarcity of a large amount of data for training. The conventional deep image prior (DIP) is a CNN based denoiser prior that perform different image restoration tasks by using only a single degraded image. Alternating Direction Method of Multipliers (ADMM) framework over a standard sub-gradient method has already been proposed with DIP method. Inspired by this, we propose a variant of ADMM-DIP method for enhancing single coil magnitude magnetic resonance (MR) images. It is well known that the noise distribution in single coil magnitude MR images is stationary Rician. We achieve the Rician noise removal from single MR image by utilizing the combined effect of MSE, KL divergence and perceptual loss functions. Also, the attention guided dense upsampling network (AUNet) was engaged as the CNN denoiser prior. Our experiments on simulated MR images indicate a better performance of the proposed method. We evaluated different denoising methods both qualitatively and quantitatively.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121839983","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708155
M. K. Shrivastava, P. Kumar
This paper presents a miniaturized microstrip antenna for Super Wide Band (SWB) (3–40 GHz) applications. The antenna consists of two asymmetrical annular rings where the first ring is connected to the feed line and the second ring is a gap coupled within the first ring. In addition to this, four stubs are connected with the antenna’s radiating element. To obtain the SWB, three circular slots are cut in the ground structure. The dimension of antenna is 16 mm × 16 mm × 1.6 mm. FR4 is used as dielectric material which has dielectric constant 4.4 and loss tangent 0.02. As the result shows the maximum gain of the antenna is 2.8 dBi. In case of VSWR ≤ 2, the bandwidth ratio and percentage bandwidth are 13.3:1 and 172%, respectively.
{"title":"A Miniaturized Super Wideband Microstrip Antenna","authors":"M. K. Shrivastava, P. Kumar","doi":"10.1109/ACTS53447.2021.9708155","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708155","url":null,"abstract":"This paper presents a miniaturized microstrip antenna for Super Wide Band (SWB) (3–40 GHz) applications. The antenna consists of two asymmetrical annular rings where the first ring is connected to the feed line and the second ring is a gap coupled within the first ring. In addition to this, four stubs are connected with the antenna’s radiating element. To obtain the SWB, three circular slots are cut in the ground structure. The dimension of antenna is 16 mm × 16 mm × 1.6 mm. FR4 is used as dielectric material which has dielectric constant 4.4 and loss tangent 0.02. As the result shows the maximum gain of the antenna is 2.8 dBi. In case of VSWR ≤ 2, the bandwidth ratio and percentage bandwidth are 13.3:1 and 172%, respectively.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122345417","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708184
Srikanth Burra, Asutosh Kar
The acoustic echo canceller developed based on a linear echo path suffers performance degradation due to distortion induced by the electronic components in hands-free devices. Recently kernel-based approach is proposed to minimize the effects of distortion. Here, the distortion is modeled using the kernel method. However, there exists a scope to further enhance the performance of echo cancellers. In this work, we propose an improved variant of the kernel approach for enhancing the performance by maintaining a better trade-off between the rate of convergence and steady-state. Simulation results show that the proposed approach was able to perform better than the existing kernel method in minimizing the impact of the sigmoidal-based saturation distortion on the echo cancellation performance.
{"title":"Adaptive Kernelized Subfilter Nonlinear AEC Algorithm","authors":"Srikanth Burra, Asutosh Kar","doi":"10.1109/ACTS53447.2021.9708184","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708184","url":null,"abstract":"The acoustic echo canceller developed based on a linear echo path suffers performance degradation due to distortion induced by the electronic components in hands-free devices. Recently kernel-based approach is proposed to minimize the effects of distortion. Here, the distortion is modeled using the kernel method. However, there exists a scope to further enhance the performance of echo cancellers. In this work, we propose an improved variant of the kernel approach for enhancing the performance by maintaining a better trade-off between the rate of convergence and steady-state. Simulation results show that the proposed approach was able to perform better than the existing kernel method in minimizing the impact of the sigmoidal-based saturation distortion on the echo cancellation performance.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127980583","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 : 2021-12-15DOI: 10.1109/ACTS53447.2021.9708321
V. Narayanan, G. Abhilash
This paper proposes a method to reconstruct a signal from its Blind Compressive measurements by formulating it as a constrained optimization problem. It considers two objective functions; one function to recover the sparse representation coefficients and the other function to estimate the signal ensuring the consistency with the given compressed measurements. The sparsifying basis is learned from the reconstructed signals using a probability based transform learning algorithm. The reconstruction of the signal, and the learning of the sparsifying basis are performed using an alternating optimization strategy. The high-frequency artifacts on the reconstructed signal are circumvented by applying total variation minimization. The convergence of the proposed algorithm which uniquely reconstructs the signal up to a practically acceptable lower bound on the estimation error is also established.
{"title":"Reconstruction of Signals from their Blind Compressive Measurements","authors":"V. Narayanan, G. Abhilash","doi":"10.1109/ACTS53447.2021.9708321","DOIUrl":"https://doi.org/10.1109/ACTS53447.2021.9708321","url":null,"abstract":"This paper proposes a method to reconstruct a signal from its Blind Compressive measurements by formulating it as a constrained optimization problem. It considers two objective functions; one function to recover the sparse representation coefficients and the other function to estimate the signal ensuring the consistency with the given compressed measurements. The sparsifying basis is learned from the reconstructed signals using a probability based transform learning algorithm. The reconstruction of the signal, and the learning of the sparsifying basis are performed using an alternating optimization strategy. The high-frequency artifacts on the reconstructed signal are circumvented by applying total variation minimization. The convergence of the proposed algorithm which uniquely reconstructs the signal up to a practically acceptable lower bound on the estimation error is also established.","PeriodicalId":201741,"journal":{"name":"2021 Advanced Communication Technologies and Signal Processing (ACTS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125010656","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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