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TL;DR: In this article, an artificial neural network (ANN) model is built for predicting PSA system performance and further optimizing the operation parameters of the PSA cycle, and an optimization algorithm based on the ANN model which was trained on the data produced from Aspen model is used to train ANN model.
74 citations
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TL;DR: In this letter, secure beamforming designs are investigated in a multiple-input multiple-output secrecy channels with simultaneous wireless information and power transfer and an SCA-based iterative algorithm is proposed in the perfect channel state information (CSI) case to obtain a near-optimal rank-one solution.
Abstract: In this letter, secure beamforming designs are investigated in a multiple-input multiple-output secrecy channels with simultaneous wireless information and power transfer. In order to achieve fairness among different multiple energy harvesting receivers, the minimum harvested energy is maximized under the secrecy rate requirements. In particular, in order to reduce the computational complexity of the semidefinite programming problem, a successive convex approximation (SCA) iterative algorithm is proposed in the perfect channel state information (CSI) case to obtain a near-optimal rank-one solution. Moreover, the original problem is extended to the imperfect CSI case by incorporating a norm-bounded error model, where an SCA-based iterative algorithm is also proposed. Simulation results reveal that the SCA-based iterative algorithm achieves the same performance as the semidefinite relaxation method with reduced complexity.
74 citations
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TL;DR: The results from this analysis provide one perspective of the field of medical informatics and are used to suggest future research directions to address issues related to better understanding of communication and social networks in the field to inform better provision of information services.
Abstract: Objective: This study presents the results of an author co-citation analysis of the interdisciplinary field of medical informatics.
Methods: An author co-citation analysis was conducted for the years 1994 to 1998, using the fifty most-cited American College of Medical Informatics fellows as an author population. Co-citation data were calculated for every author pair, and multivariate analyses were performed to ultimately show the relationships among all authors. A multidimensional map was created, wherein each author is represented as a point, and the proximity of these points reflects the relationships of authors as perceived by multiple citers.
Results and Conclusion: The results from this analysis provide one perspective of the field of medical informatics and are used to suggest future research directions to address issues related to better understanding of communication and social networks in the field to inform better provision of information services.
74 citations
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TL;DR: In this paper, two parasitic mushroom-type arrays are incorporated along with the two radiating edges of a main radiating patch, and the current distributions on those metal patches are nearly uniform so that high gains are achieved over the entire operating bandwidth.
Abstract: This letter presents a novel broadband microstrip patch antenna with a simple geometry. Two parasitic mushroom-type arrays are incorporated along with the two radiating edges of a main radiating patch. First, thanks to the mushroom-type structure, a new resonant mode, characterized as quasi-TM $_{30}$ mode, is generated. Besides, the main radiating patch produces the original TM $_{10}$ mode. Thus, wideband performance is realized on the basis of the two combined modes. Second, the current distributions on those metal patches are nearly uniform so that high gains are achieved over the entire operating bandwidth. Measured results indicate that the enhanced impedance bandwidth is from 11.9 to 18.2 GHz, which covers the whole Ku-band. Meanwhile, a nearly constant peak-radiating gain between 10 and 10.5 dBi at broadside radiation is obtained. The proposed antenna maintains the advantages of wide bandwidth, ease of fabrication, flat and high gains, and a low profile less than ${\lambda _0}$ /13 thickness substrate.
73 citations
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TL;DR: Simulation results show that the proposed RSBF scheme can effectively improve the ASR and also outperforms other benchmark schemes, for both colluding and noncolluding eavesdropping scenarios.
Abstract: In this letter, we investigate the robust and secure beamforming (RSBF) in an intelligent reflecting surface (IRS) aided millimeter wave (mmWave) multiple input single output (MISO) system, where multiple single antenna eavesdroppers (Eves) are arbitrarily distributed nearby the legitimate receiver (Bob). Considering the channel state information (CSI) of cascaded wiretap channels is imperfectly known at the legitimate transmitter (Alice), the RSBF design problems to maximize the worst case of achievable secrecy rate (ASR) are formulated under the total transmission power and unit-modulus constraints. Since the problems are difficult to solve optimally due to their non-convexity and coupled variables, we substitute the wiretap channels by a weighted combination of discrete samples and propose a RSBF scheme based on alternating optimization and semidefinite relaxation (SDR) techniques, for both colluding and noncolluding eavesdropping scenarios. Simulation results show that the proposed RSBF scheme can effectively improve the ASR and also outperforms other benchmark schemes.
73 citations
Authors
Showing all 2106 results
Name | H-index | Papers | Citations |
---|---|---|---|
Xiang-Gen Xia | 72 | 744 | 20563 |
Wei Xiong | 58 | 364 | 10835 |
S. Shyam Sundar | 53 | 210 | 10261 |
Mary Beth Oliver | 40 | 151 | 6854 |
James E. Katz | 39 | 152 | 8957 |
Qihui Wu | 39 | 295 | 7001 |
Timothy L. Sellnow | 37 | 137 | 5557 |
Homero Gil de Zúñiga | 37 | 134 | 8158 |
J. David Johnson | 31 | 100 | 3924 |
Zizi Papacharissi | 30 | 63 | 9078 |
Guoru Ding | 30 | 155 | 4729 |
Jinlong Wang | 29 | 127 | 3201 |
Yueming Cai | 29 | 206 | 3198 |
Yuhua Xu | 29 | 170 | 4196 |
Panlong Yang | 27 | 191 | 2374 |