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2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)最新文献

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Electronic Quadrature Hybrid Duplexer for Wireless Simultaneous Transmit Receive Operation 用于无线同步收发操作的电子正交混合双工器
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866334
D. Regev, Erez Zolkov, Nimrod Ginzberg, S. Shilo, D. Ezri, E. Cohen
{"title":"Electronic Quadrature Hybrid Duplexer for Wireless Simultaneous Transmit Receive Operation","authors":"D. Regev, Erez Zolkov, Nimrod Ginzberg, S. Shilo, D. Ezri, E. Cohen","doi":"10.1109/WMCS55582.2022.9866334","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866334","url":null,"abstract":"This article presents a new four-port electronic device – the directional quadrature hybrid isolator (DQHI). The topology of this duplexer is similar to the four-arm quadrature hybrid (QH) except for a 90° non-reciprocal phase shifter (NRPS) replacing one of the λ/4 Z0 arms. We derive the DQHI S-parameters and show that it performs a 0°/90° power division for an incident signal at port 2 into ports 3 and 4 exactly like a QH, functions as an ideal isolator between ports 1 and 2, enables high-isolation between port 1 to ports 3 and 4 and facilitates injection of self-interference cancellation (SIC) signal from port 4 into 3. Analytic evaluation of a dual-port N-path circuit as an NRPS is performed and the theoretical impact on the DQHI performance is examined. An 8-path, 65-nm NMOS design is utilized to simulate the performance with a 1 GHz clock resulting in 1.7 dB TX-to-antenna loss, antenna-RX loss of 3 dB, SIC-to-RX loss of 6.6 dB, TX-RX and TX-SIC isolations of 26 and 12.5 dB respectively.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122806913","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}
引用次数: 0
The Effect of Amplifier Nonlinearities on Directionally Modulated Signals in Phased-Array Transmitters 相控阵发射机中放大器非线性对定向调制信号的影响
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866395
Samuel Haug, Adam Goad, C. Baylis, Austin Egbert, R. Marks, Sarah A. Seguin, A. Martone, B. Kirk
{"title":"The Effect of Amplifier Nonlinearities on Directionally Modulated Signals in Phased-Array Transmitters","authors":"Samuel Haug, Adam Goad, C. Baylis, Austin Egbert, R. Marks, Sarah A. Seguin, A. Martone, B. Kirk","doi":"10.1109/WMCS55582.2022.9866395","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866395","url":null,"abstract":"Directionally modulated signals from an antenna allow for the secure transmission of different communication symbols in several directions at the same time. The information required to generate these directionally modulated signals is stored in a vector of relative current weights for each antenna element. In a realistic array environment, these signals must be amplified for transmission. We use these idealized element weights as the input voltages for each element’s power amplifier. The integrity of these relative weights through the amplification process is of great importance to the integrity of the transmitted communication symbols. Knowledge of these distortion effects may aid in the implementation of directionally modulated signals in a real array environment. We study the effects of nonlinear amplifier performance on this integrity through a nonlinear circuit simulation platform.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116643283","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}
引用次数: 1
Energy-Efficient RF-Optics Multi-Beam Systems Using Correlation Technologies: Toward Hybrid GaN-FDSOI Front-End-Modules 使用相关技术的高能效射频光学多光束系统:迈向混合GaN-FDSOI前端模组
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866246
S. Wane, F. Ferrero, J. Sombrin, L. Tombakdjian, D. Bajon, P. Ratajczak, F. Molina, M. Rack, L. Nyssens, J.-P. Raskin, D. Lederer, C. Craeye, G. Albertini, V. Huard, P. Poilvert, C. Tavernier, D. Floriot
{"title":"Energy-Efficient RF-Optics Multi-Beam Systems Using Correlation Technologies: Toward Hybrid GaN-FDSOI Front-End-Modules","authors":"S. Wane, F. Ferrero, J. Sombrin, L. Tombakdjian, D. Bajon, P. Ratajczak, F. Molina, M. Rack, L. Nyssens, J.-P. Raskin, D. Lederer, C. Craeye, G. Albertini, V. Huard, P. Poilvert, C. Tavernier, D. Floriot","doi":"10.1109/WMCS55582.2022.9866246","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866246","url":null,"abstract":"In this paper, we propose hybrid GaN-FDSOI Front-End-Modules (FEMs) combined with lens-based mmWave antenna modules for energy-efficient multi-beamforming systems. X-topology Lattice-based balanced (LB) and unbalanced (LU) differential switches are designed and fabricated using FDSOI platforms for building scalable multi-beamforming FEMs. Unified mmWave and Baseband correlation technologies based on energy density and EVM (Error Vector Magnitude) metrics are introduced for low complexity (leveraging sparsity of MIMO channels) cost-effective multi-beamforming systems. Combination of convolutional accelerators with analog signal processing for linking beam-selection algorithms to stochastic-wave-shaping (SWS) will create new paradigms for eliminating the concept of “elements” in arrays and replacing it by the vision of “radiating current flows” over a textured surface (metasurface or metavolume). The radiating metasurfaces or metavolumes which can be conformal to the patterned optical lenses are fed by a limited number of emitting/receiving points. The use of time-modulated correlation functions will foster new system architectures with critical functionalities including direction of arrival (DOA) estimation and secure communications.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116878711","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}
引用次数: 1
Massive MIMO Uplink Signal Detector for 5G and Beyond Networks 用于5G及以后网络的大规模MIMO上行信号检测器
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866166
Robin Chataut, R. Akl, U. K. Dey
{"title":"Massive MIMO Uplink Signal Detector for 5G and Beyond Networks","authors":"Robin Chataut, R. Akl, U. K. Dey","doi":"10.1109/WMCS55582.2022.9866166","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866166","url":null,"abstract":"Multiple-input Multiple-output (MIMO) technology uses multiple transmitter and receiver antennas for improving throughput and coverage. Massive MIMO is an advancement of MIMO technology that utilizes large numbers of antenna terminals at both transmitter and receiver to provide high spectral efficiency with simple processing. Massive MIMO today has become a captivating technology for future generation networks. Traditional linear, non-linear, and iterative uplink signal detection algorithms for massive MIMO systems do not provide optimal performance, and are computationally inefficient. This paper proposes a fast-convergent detector for massive MIMO systems based on the refinement of the Jacobi iterative method. The proposed algorithm utilizes a novel initialization matrix and a successive over-relaxation (SOR) preconditioner to enhance the convergence of the proposed method. The numerical results verify the optimal error and complexity performance of the proposed algorithm for uplink signal detection in massive MIMO systems.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117240896","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}
引用次数: 4
Prototype for an Optimized Drive Signal Control System for a 2.5 GHz Doherty Power Amplifier 2.5 GHz Doherty功率放大器驱动信号优化控制系统原型
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866287
Pallav Sah, Karthik Kakaraparty, M. Poulton, H. Luyen, I. Mahbub
{"title":"Prototype for an Optimized Drive Signal Control System for a 2.5 GHz Doherty Power Amplifier","authors":"Pallav Sah, Karthik Kakaraparty, M. Poulton, H. Luyen, I. Mahbub","doi":"10.1109/WMCS55582.2022.9866287","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866287","url":null,"abstract":"This paper presents an optimized drive signal control system for a 2.5 GHz Doherty power amplifier (PA). The proposed system enables independent control of the amplitudes and phases of the drive signals fed to the inputs of two parallel PAs that can be used in a Doherty PA architecture. This is achieved by incorporating a variable amplitude shifter (VAS) and a variable phase shifter (VPS) in each of the two parallel paths, which allows for driving uneven power levels with an arbitrary phase difference to the individual PAs. The specific VAS (Qorvo QPC6614) and VPS (Qorvo QPC2108) components that we used for the test system provide an amplitude attenuation range from 22 dB to 31.5 dB with a step size of 0.5 dB and a phase range from 0° to 360° at the intended operating frequency of 2.5 GHz, offering the benefit of characterizing the behavior of PAs under test for a large range of drive signals to optimize the output performance such as power added efficiency or adjacent channel leakage ratio. For demonstration, the proposed drive signal control system is integrated with two parallel GaN transistor-based PAs (Qorvo QPD0005) with a P1dB of 37.7 dBm, whose output signals are combined and then measured to provide system characterization. Each PA is preceded by a drive amplifier with a gain of 17.8 dB to boost the power fed into the PA. The proposed circuit also incorporates a 20 dB directional coupler and a 3 dB Wilkinson power splitter, which were designed, fabricated on an FR4 substrate, and experimentally verified. While Qorvo QPD0005 was used as a specific test-case in this demonstration, the proposed system can be used to characterize the behavior of a wide range of Doherty PAs.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114548482","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}
引用次数: 0
Effective Linearization of Millimeter-Wave Power Amplifiers Using LUT-Based Digital Predistortion (DPD) 基于lut的数字预失真(DPD)毫米波功率放大器的有效线性化
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866349
G. Somasundaram, J. Mayeda, D. Lie, Jerry Lopez
{"title":"Effective Linearization of Millimeter-Wave Power Amplifiers Using LUT-Based Digital Predistortion (DPD)","authors":"G. Somasundaram, J. Mayeda, D. Lie, Jerry Lopez","doi":"10.1109/WMCS55582.2022.9866349","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866349","url":null,"abstract":"In this paper, we present an effective Digital Pre- Distortion algorithm (DPD) and successfully linearized three millimeter-wave (mm-Wave) power amplifiers (PAs). The DPD algorithm computes look-up tables (LUT) to estimate the PA co-efficients to pre-distort the input signal. All PAs of various gain and POUT after DPD have achieved Adjacent Channel Leakage Ratio (ACLR) improvement of around 13 dB to −50 dBc at 24 GHz, and with Error Vector Magnitude (EVM) reduction of about 1.5% to 5.5%. The LUT DPD algorithm works well for 256 QAM (Quadrature Amplitude Modulation) LTE (Long Term Evolution) modulated input signal with a bandwidth of 20 MHz, and a peak-to-average-power-ratio (PAPR) of 8.7 dB.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127596060","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}
引用次数: 2
A 410-GHz Detector using AC-coupled Substrate-Integrated Waveguide Slot Antenna in CMOS 基于CMOS交流耦合基板集成波导缝隙天线的410 ghz探测器
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866391
Md Toaha Anas, Saad Azmeen-ur-Rahman, W. Choi
{"title":"A 410-GHz Detector using AC-coupled Substrate-Integrated Waveguide Slot Antenna in CMOS","authors":"Md Toaha Anas, Saad Azmeen-ur-Rahman, W. Choi","doi":"10.1109/WMCS55582.2022.9866391","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866391","url":null,"abstract":"In this paper, a 410-GHz detector is designed using an AC-coupled on-chip substrate-integrated waveguide (SIW) slot antenna in a 65-nm CMOS process. The antenna shows simulated radiation efficiency of 35% and −10-dB bandwidth of 20 GHz at 410 GHz. Since SIW structures are DC-shorted in the sidewall, additional AC-coupling structures are necessary for circuit integration. In this work, an AC-coupling structure is implemented by exploiting the antenna sidewall as a metal-oxide-metal capacitor without increasing the size or introducing additional loss. A diode-connected NMOS transistor is used to design the detector. The detector exhibits simulated voltage responsivity of 316 V/W and noise equivalent power of 37 pW/√Hz at 410 GHz, demonstrating AC-coupled SIW slot antenna can be employed for THz detection.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128284424","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}
引用次数: 0
A Dual-Band Transmitarray Antenna with Independent Beam Control at Ka Band Ka波段独立波束控制的双频发射阵列天线
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866157
Abdul-Sattar Kaddour, S. Georgakopoulos
{"title":"A Dual-Band Transmitarray Antenna with Independent Beam Control at Ka Band","authors":"Abdul-Sattar Kaddour, S. Georgakopoulos","doi":"10.1109/WMCS55582.2022.9866157","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866157","url":null,"abstract":"This paper presents a three-layer, dual-band, linearly polarized, transmitarray antenna (TA) operating in the Ka band (19 GHz/29 GHz) for satellite communication systems. The proposed 5.2×5.2 mm2 unit-cell is based on two folded rectangular strips on the receiving and transmitting layers, which are connected using metalized vias. Each folded rectangular strip is designed to achieve a 180° phase resolution (i.e., 1-bit phase quantization) at its corresponding operating frequency. The proposed radiating element can form independent linearly polarized beams at each frequency band using the same radiating aperture. This TA design provides a maximum gain of 21.2 and 24.5 dBi at 19 GHz and 29 GHz, respectively.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133498698","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}
引用次数: 0
6–12 GHz Horn Antenna Array with Thermal Analysis for Power Amplifier Integration 6-12 GHz喇叭天线阵列与功率放大器集成热分析
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866264
Paige Danielson, L. Marzall, Jack A. Molles, Z. Popovic
{"title":"6–12 GHz Horn Antenna Array with Thermal Analysis for Power Amplifier Integration","authors":"Paige Danielson, L. Marzall, Jack A. Molles, Z. Popovic","doi":"10.1109/WMCS55582.2022.9866264","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866264","url":null,"abstract":"This paper presents the design and characterization of an octave-bandwidth 6–12 GHz 4-element linear array. The antenna elements are small-aperture linearly-polarized high-gain flared ridge horns, loaded with machined dielectric lenses and fed with ridge waveguide-to-microstrip transitions. A broadband Wilkinson power divider feeds the array elements in phase. Absorbers are added to limit the back radiation from the metal fixture and the microstrip-to-ridged waveguide transition, which improves the radiation pattern. The measured patterns match the simulations, with gain varying from 6.1 dBi to 12.9 dBi over the bandwidth. The array is designed for integration with high-power solid-state amplifiers and thermal simulations are performed to quantify the temperature distribution across the array with expected heat power between 2 and 20W dissipated by the amplifiers in the feed network.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124910382","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}
引用次数: 3
Enhancing High-Frequency Performance of Millimeter-Wave Transistors by Optimizing Device Width 优化器件宽度提高毫米波晶体管高频性能
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS) Pub Date : 2022-04-19 DOI: 10.1109/WMCS55582.2022.9866276
Amirreza Ghadimi Avval, Soheil Nouri, S. El-Ghazaly
{"title":"Enhancing High-Frequency Performance of Millimeter-Wave Transistors by Optimizing Device Width","authors":"Amirreza Ghadimi Avval, Soheil Nouri, S. El-Ghazaly","doi":"10.1109/WMCS55582.2022.9866276","DOIUrl":"https://doi.org/10.1109/WMCS55582.2022.9866276","url":null,"abstract":"The high-frequency operability of millimeter-wave devices is investigated in this paper. An AlGaN/GaN HEMT device is studied, and the results obtained from the distributed modeling approach is compared with measurements. To validate the performance of the modeling approach, non-linear operation of the model under large signal analysis is demonstrated. According to the distributed model, the signal behavior on the input and output electrodes are observed for various operating frequencies. The main reasons for the discrepancies in the output power and gain of the device are explained and the limitations arisen from the device width in higher frequency bands can be exploited. Finally, a solution is provided to demonstrate alleviating the frequency restrictions and nonlinear frequency-gain relations for devices configured with the current fabrication technologies.","PeriodicalId":447341,"journal":{"name":"2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129123785","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}
引用次数: 3
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