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Your search keyword '"Lei, Siyuan"' showing total 290 results
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290 results on '"Lei, Siyuan"'

15. Intensity modulated radiation therapy with stereotactic body radiation therapy boost for unfavorable prostate cancer: five-year outcomes

Author

Carrasquilla, Michael, primary, Sholklapper, Tamir, additional, Pepin, Abigail N., additional, Hodgins, Nicole, additional, Lei, Siyuan, additional, Rashid, Abdul, additional, Danner, Malika, additional, Zwart, Alan, additional, Bolanos, Grecia, additional, Ayoob, Marilyn, additional, Yung, Thomas, additional, Aghdam, Nima, additional, Collins, Brian, additional, Suy, Simeng, additional, Kumar, Deepak, additional, Hankins, Ryan, additional, Kowalczyk, Keith, additional, Dawson, Nancy, additional, and Collins, Sean, additional

Published
2023
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22. 2-D Multibeam Leaky-Wave Antenna Based on Modified Luneburg Lens

Author

Lei, Siyuan, Wei, Gao, Han, Kangkang, Qiu, Tiancheng, and Wang, Min

Abstract

In this letter, a multibeam leaky-wave antenna (LWA) based on a modified Luneburg lens (LL) beamforming network is proposed. The antenna performs a simple structure and low profile with 2-D beam scanning. First, the modified LL serves as a beamforming network since its variation range ratio of refractive index can be determined by the relative permittivity of the substrate. This can be simply achieved using a printed circuit board technique rather than the square root of two of conventional LL. Then, the relationship between the input port angle and the multibeam angle is analyzed using the geometric-optical method. Finally, a high-scanning-rate LWA array based on spoof surface plasmon polaritons is designed, and its open-stopband is effectively suppressed. A prototype is simulated and fabricated. The measured results show that the proposed antenna has a multibeam range of −42° to 40° in the E-plane and a beam scanning range of −53° to 44° in the H-plane within 8–10.5 GHz, which agrees well with the calculation and simulation.

Published
2024
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23. Dual Circularly Polarized and Linearly Sweeping Leaky-Wave Antenna

Author

Lei, Siyuan, Wei, Gao, Han, Kangkang, Qiu, Tiancheng, and Wang, Min

Abstract

In this letter, a dual circularly polarized periodic leaky-wave antenna based on spoof surface plasmon polaritons (SSPPs) with linearly sweeping beams is proposed. The antenna can simultaneously radiate left-handed circular polarization (LHCP) and right-handed circular polarization (RHCP) beams. Single-arm Archimedean spirals serve as radiators and are designed. Based on linearity analysis and curve fitting, SSPPs structure with potentially linear scanning ability are selected. Finally, the axial ratio (AR) and S-parameter for the proposed SSPPs antenna with spiral radiators are optimized around the broadside frequency using longitudinally asymmetric analysis. A prototype is fabricated and measured results show that the proposed antenna achieves a relative 3 dB AR bandwidth of 31.6% (8–11 GHz) with the same LHCP and RHCP scanning range of 65° and linearly sweeping ability.

Published
2024
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24. Effectiveness of Chinese herbal medicine combined with conventional medicine on acute exacerbation of chronic obstructive pulmonary disease: a systematic review and Meta-analysis

Author

GUO, Wen, LI, Xuanlin, ZHAO, Hulei, LEI, Siyuan, XIE, Yang, and LI, Jiansheng

Subjects
Meta Analysis
Abstract

OBJECTIVE: To systematically evaluate the efficacy and safety of Chinese herbal medicine (CHM) combined with conventional Western Medicine (CWM) on acute exacerbation of chronic obstructive pulmonary disease (AECOPD) based on high-quality randomized placebo-controlled trials. METHODS: We searched PubMed, Embase, Cochrane Library, China National Knowledge Infrastructure Database, Chinese Biomedical Literature Database, China Science and Technology Journal Database, and Wanfang databases for randomized placebo-controlled trials of CHM treatment for AECOPD from inception to June 4, 2021. The Cochrane Collaboration’s tool and the Grading of Recommendations, Assessment, Development and Evaluation were used to assess the risk of bias and the evidence quality of the included studies. Revman 5.3 software was used for Meta-analysis. RESULTS: A total of 9 trials involving 1591 patients were included. The Meta-analysis showed that based on CWM treatment, CHM group had significant advantages over the placebo group in ameliorating clinical total effective rate [RR = 1.29, 95% CI (1.07, 1.56), P = 0.007, low quality] and TCM symptom scores [MD = -2.99, 95% CI (-4.46, -1.53), P < 0.0001, moderate quality], improving arterial blood gas results [PaO(2): MD = 4.51, 95% CI (1.97, 7.04), P = 0.0005, moderate quality; PaCO(2): MD = -2.87, 95% CI (-4.28, -1.46), P < 0.0001, moderate quality], reducing CAT scores [MD = -2.08, 95% CI (-2.85, -1.31), P < 0.000 01, moderate quality]，length of hospitalization [MD = -1.87, 95% CI (-3.33, -0.42), P = 0.01, moderate quality], and acute exacerbation rate [RR = 0.60, 95% CI (0.43, 0.83), P = 0.002, moderate quality]. No serious CHM-related adverse events were reported. CONCLUSIONS: The current evidence indicates that CHM is an effective and well-tolerated adjunct therapy for AECOPD patients receiving CWM. However, considering the high heterogeneity, this conclusion requires confirmation.

Published
2023

42. Design of Broadband 9×9 Butler Matrix and its Extension for Multibeam Application

Author

Han, Kangkang, Wei, Gao, Lei, Siyuan, Wang, Min, and Qiu, Tiancheng

Abstract

In this brief, a broadband $9\times9$ Butler Matrix (BM) and its extension for multibeam antenna array (MAA) application are presented. Based on the configuration of $3\times3$ beamforming network (BFN) comprised of three couplers and two 90° phase shifters, the topology of $9\times9$ BM is built, which can provide in-phase signals at output ports. And a broadband $9\times9$ BM is implemented to verify the design by adopting broadband components. The results indicate that the designed broadband $9\times9$ BM achieves equal power division and 9 uniformly distributed progressive phases (PPs) between output signals in a relative bandwidth of 40% when the 9 input ports are excited, respectively. And the fabricated $9\times9$ BM is applied in MAA for producing 9 beams including a boresight beam. In addition, according to the design method of $9\times9$ BM, the topology of the extended $27\times27$ BM is built and presented, which validates that an extended BM with higher order can be realized by the design method, and the extended BM can also provide in-phase signals at output ports.

Published
2023
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44. Joint mobilization for frozen shoulder

Author

Yao, Junjie, primary, Liu, Chang, additional, Pang, Tingting, additional, Li, Jiahui, additional, Lei, Siyuan, additional, Zhang, Jiangchun, additional, Wang, Yufeng, additional, and Shang, Qiangqiang, additional

Published
2022
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46. Rationale for Utilization of Hydrogel Rectal Spacers in Dose Escalated SBRT for the Treatment of Unfavorable Risk Prostate Cancer

Author

Repka, Michael C., primary, Creswell, Michael, additional, Lischalk, Jonathan W., additional, Carrasquilla, Michael, additional, Forsthoefel, Matthew, additional, Lee, Jacqueline, additional, Lei, Siyuan, additional, Aghdam, Nima, additional, Kataria, Shaan, additional, Obayomi-Davies, Olusola, additional, Collins, Brian T., additional, Suy, Simeng, additional, Hankins, Ryan A., additional, and Collins, Sean P., additional

Published
2022
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50. sj-docx-3-cre-10.1177_02692155221095481 - Supplemental material for Clinical evidence for improving exercise tolerance and quality of life with pulmonary rehabilitation in patients with idiopathic pulmonary fibrosis: A systematic review and meta-analysis

Author

Lei, Siyuan, Li, Xuanlin, Xie, Yang, and Li, Jiansheng

Subjects
FOS: Clinical medicine, 110604 Sports Medicine, FOS: Health sciences, 110904 Neurology and Neuromuscular Diseases, 110314 Orthopaedics
Abstract

Supplemental material, sj-docx-3-cre-10.1177_02692155221095481 for Clinical evidence for improving exercise tolerance and quality of life with pulmonary rehabilitation in patients with idiopathic pulmonary fibrosis: A systematic review and meta-analysis by Siyuan Lei, Xuanlin Li, Yang Xie, and Jiansheng Li in Clinical Rehabilitation

Published
2022
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