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Rapid Phase Ambiguity Elimination Methods for DOA Estimator via Hybrid Massive MIMO Receive Array

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Chinese Journal of Electronics 2024年第1期33卷 175-184页

作者： Xichao ZHAN zhongwen SUN feng SHU Yiwen CHEN Xin CHENG Yuanyuan WU Qi ZHANG Yifan LI Peng ZHANG School of Information and Communication Engineering Hainan University School of Electronic and Optical Engineering Nanjing University of Science and Technology

For a sub-connected hybrid multiple-input multiple-output(MIMO) receiver with K subarrays and N antennas, there exists a challenging problem of how to rapidly remove phase ambiguity in only single time-slot. A direction of arrival(DOA) estimator of maximizing received power(Max-RP) is proposed to find the maximum value of K-subarray output powers, where each subarray is in charge of one sector, and the center angle of the sector corresponding to the maximum output is the estimated true DOA. To make an enhancement on precision, Max-RP plus quadratic interpolation(Max-RP-QI) method is designed. In the proposed Max-RP-QI, a quadratic interpolation scheme is adopted to interpolate the three DOA values corresponding to the largest three receive powers of Max-RP.To achieve the Cramer Rao lower bound, a Root-MUSIC plus Max-RP-QI scheme is developed. Simulation results show that the proposed three methods eliminate the phase ambiguity during one time-slot and also show low computational complexities. The proposed Root-MUSIC plus Max-RP-QI scheme can reach the Cramer Rao lower bound,and the proposed Max-RP and Max-RP-QI are still some performance losses 2–4 d B compared to the Cramer Rao lower bound.

关键词： Hybrid analog and digital Direction of arrival Massive hybrid multiple-input multiple-output Phase ambiguity Low computational complexity

Quantum corrections to the thermodynamics and phase transition of a black hole surrounded by a cavity in the extended phase space

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Communications in Theoretical Physics 2022年第8期74卷 116-124页

作者： zhongwen feng Xia Zhou Shiqi Zhou Shuzheng Yang Physics and Space Science College China West Normal UniversityNanchong 637009China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China

In the extended phase space,we investigate the rainbow gravity-corrected thermodynamic phenomena and phase structure of the Schwarzschild black hole surrounded by a spherical cavity.The results show that rainbow gravity has a very significant effect on the thermodynamic phenomena and phase structure of the black hole.It prevents the black hole from total evaporation and leads to a remnant with a limited temperature but no mass.Additionally,we restore the P-V criticality and obtain the critical quantities of the canonical ensemble.When the temperature or pressure is smaller than the critical quantities,the system undergoes two Hawking-Page-like phase transitions and one first-order phase transition,which never occurs in the original case.Remarkably,our findings demonstrate that the thermodynamic behavior and phase transition of the rainbow SC black hole surrounded by a cavity in the extended phase space are analogous to those of the Reissner–Nordstr?m anti-de Sitter black hole.Therefore,rainbow gravity activates the effect of electric charge and cutoff factor in the evolution of the black hole.

关键词： rainbow gravity phase transitions extended phase space

Modified Tunneling Radiation of Fermions from a Spherically Symmetric Spacetime with Dark Matter

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Journal of Applied Mathematics and Physics 2015年第8期3卷 931-936页

作者： zhongwen feng Xiaotao Zu School of Physical Electronics University of Electronic Science and Technology of China Chengdu China

In the paper, we use the generalized Dirac equation to study the Hawking temperature and entropy of a spherically symmetric spacetime with the dark matter. The results show that the dark matter can influence the thermodynamic properties of the black hole. Meanwhile, we find the GUP corrected temperature and entropy are not only determined by the nature of black but also related to the properties of tunneling particles. Besides, the GUP can slow down the increase of Hawking temperature and causes the remnants.

关键词： Generalized Uncertainty Principle Spherically Symmetric Spacetime Dark Matter

新时代雷锋精神育人与高校思政文化融合路径研究

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安阳师范学院学报 2024年第1期26卷 125-129页

作者：潘忠文湖南财政经济学院经济学院湖南长沙410205

新时代下弘扬和发展雷锋精神,培育德才兼备的时代大学生,是整个社会不可推卸的责任和义务。雷锋精神育人与高校思政文化的有效融合有利于引导高校大学生树立正确的人生观和价值观,关系着高校大学生的健康成长和发展。基于新时代背景,深... 详细信息

新时代下弘扬和发展雷锋精神,培育德才兼备的时代大学生,是整个社会不可推卸的责任和义务。雷锋精神育人与高校思政文化的有效融合有利于引导高校大学生树立正确的人生观和价值观,关系着高校大学生的健康成长和发展。基于新时代背景,深入分析雷锋精神育人与高校思政文化的新时代内涵,进一步探究雷锋精神育人与高校思政文化融合的有效路径,具有重要意义。

关键词：雷锋精神育人高校思政文化大学生

The Jiao Tong University Spectroscopic Telescope Project

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Astronomical Techniques and Instruments 2024年第1期1卷 16-30页

作者： JUST Team Chengze Liu Ying Zu Fabo feng Zhaoyu Li Yu Yu Hua Bai Xiangqun Cui Bozhong Gu Yizhou Gu Jiaxin Han Yonghui Hou zhongwen Hu Hangxin Ji Yipeng Jing Wei Li Zhaoxiang Qi Xianyu Tan Cairang Tian Dehua Yang Xiangyan Yuan Chao Zhai Congcong Zhang Jun Zhang Haotong Zhang Pengjie Zhang Yong Zhang Yi Zhao Xianzhong Zheng Qingfeng Zhu Xiaohu Yang Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China Department of Astronomy School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China University of Chinese Academy of Sciences NanjingNanjing 211135China University of Chinese Academy of Sciences Beijing 101408China Lenghu Technology Innovation Industrial Park Management Committee Lenghu 817400China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Department of Astronomy University of Science and Technology of ChinaHefei 230026China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China

The Jiao Tong University Spectroscopic Telescope(JUST)is a 4.4-meter f/6.0 segmented-mirror telescope dedicated to spectroscopic observations.The JUST primary mirror is composed of 18 hexagonal segments,each with a diameter of 1.1 m.JUST provides two Nasmyth platforms for placing science instruments.One Nasmyth focus fits a field of view of 10′and the other has an extended field of view of 1.2°with correction optics.A tertiary mirror is used to switch between the two Nasmyth foci.JUST will be installed at a site at Lenghu in Qinghai Province,China,and will conduct spectroscopic observations with three types of instruments to explore the dark universe,trace the dynamic universe,and search for exoplanets:(1)a multi-fiber(2000 fibers)medium-resolution spectrometer(R=4000-5000)to spectroscopically map galaxies and large-scale structure;(2)an integral field unit(IFU)array of 500 optical fibers and/or a long-slit spectrograph dedicated to fast follow-ups of transient sources for multi-messenger astronomy;(3)a high-resolution spectrometer(R~100000)designed to identify Jupiter analogs and Earth-like planets,with the capability to characterize the atmospheres of hot exoplanets.

关键词： Astronomical instrumentation Optical telescopes Large-scale structure of the universe Redshift surveys Time domain astronomy Exoplanet astronomy

Efficacy and safety of LY01005 versus goserelin implant in Chinese patients with prostate cancer: A multicenter, randomized, open-label, phase III, non-inferiority trial

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Chinese Medical Journal 2023年第10期136卷 1207-1215页

作者： Chengyuan Gu Zengjun Wang Tianxin Lin Zhiyu Liu Weiqing Han Xuhui Zhang Chao Liang Hao Liu Yang Yu Zhenzhou Xu Shuang Liu Jingen Wang Linghua Jia Xin Yao Wenfeng Liao Cheng Fu Zhaohui Tan Guohua He Guoxi Zhu Rui Fan Wenzeng Yang Xin Chen Zhizhong Liu Liqiang Zhong Benkang Shi Degang Ding Shubo Chen Junli Wei Xudong Yao Ming Chen Zhanpeng Lu Qun Xie Zhiquan Hu Yinhuai Wang Hongqian Guo Tiwu Fan Zhaozhao Liang Peng Chen Wei Wang Tao Xu Chunsheng Li Jinchun Xing Hong Liao Dalin He Zhibin Wu Jiandi Yu zhongwen feng Mengxiang Yang Qifeng Dou Quan Zeng Yuanwei Li Xin Gou Guangchen Zhou Xiaofeng Wang Rujian Zhu Zhonghua Zhang Bo Zhang Wanlong Tan Xueling Qu Hongliang Sun Tianyi Gan Dingwei Ye Department of Urology Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Department of Urology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210029China Department of Urology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhouGuangdong 510120China Department of Urology The Second Affiliated Hospital of Dalian Medical UniversityDalianLiaoning 116023China Department of Urology The Affiliated Cancer Hospital of Xiangya School of MedicineCentral South UniversityHunan Cancer CenterChangshaHunan 410013China Department of Urology First Hospital of Shanxi Medical UniversityTaiyuanShanxi 030000China Department of Urology Jiangxi Provincial People’s HospitalSchool of MedicineNanchang UniversityNanchangJiangxi 330006China Department of Urology Tianjin Medical University Cancer Institute and HospitalTianjin 300060China Department of Urology Cancer Hospital of China Medical UniversityLiaoning Cancer Hospital and InstituteShenyangLiaoning 110043China Department of Urology Inner Mongolia People’s HospitalHohhotInner Mongolia 010010China Department of Urinary Surgery Taizhou Hospital of Traditional Chinese MedicineTaizhouJiangsu 225300China Department of Urology Linfen People’s HospitalLinfenShanxi 041000China Department of Urology Zhengzhou Central Hospital Affiliated to Zhengzhou UniversityZhengzhouHenan 450006China Department of Urology The Affiliated Hospital of Hebei UniversityBaodingHebei 071000China Department of Urology Chifeng Municipal HospitalChifeng Clinical Medical College of Inner Mongolia Medical UniversityChifengInner Mongolia 024000China Department of Urology Baogang HospitalBaotouInner Mongolia 014010China Department of Oncology The Second People’s Hospital of YibinYibinSichuan 644000China Department of Urology Qilu Hospital of Shandong UniversityJinanShandong 250014China Department of Urology Henan Provincial People’s Hos

Background:LY01005(Goserelin acetate sustained-release microsphere injection)is a modified gonadotropin-releasing hormone(GnRH)agonist injected monthly.This phase III trial study aimed to evaluated the efficacy and safety of LY01005 in Chinese patients with prostate cancer.Methods:We conducted a randomized controlled,open-label,non-inferiority trial across 49 sites in China.This study included 290 patients with prostate cancer who received either LY01005 or goserelin implants every 28 days for three injections.The primary efficacy endpoints were the percentage of patients with testosterone suppression≤50 ng/dL at day 29 and the cumulative probability of testosterone≤50 ng/dL from day 29 to 85.Non-inferiority was prespecified at a margin of-10%.Secondary endpoints included significant castration(≤20 ng/dL),testosterone surge within 72 h following repeated dosing,and changes in luteinizing hormone,follicle-stimulating hormone,and prostate specific antigen levels.Results:On day 29,in the LY01005 and goserelin implant groups,testosterone concentrations fell below medical-castration levels in 99.3%(142/143)and 100%(140/140)of patients,respectively,with a difference of-0.7%(95%confidence interval[CI],-3.9%to 2.0%)between the two groups.The cumulative probabilities of maintaining castration from days 29 to 85 were 99.3%and 97.8%,respectively,with a between-group difference of 1.5%(95%CI,-1.3%to 4.4%).Both results met the criterion for non-inferiority.Secondary endpoints were similar between groups.Both treatments were well-tolerated.LY01005 was associated with fewer injection-site reactions than the goserelin implant(0%vs.1.4%[2/145]).Conclusion:LY01005 is as effective as goserelin implants in reducing testosterone to castration levels,with a similar safety profile.Trial registration:ClinicalTrials.gov,NCT04563936.

关键词： Prostatic neoplasms LY01005 Gonadotropin-releasing hormone agonist Efficacy Safety

FVID: Fishing Vessel Type Identification Based on VMS Trajectories

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Journal of Ocean University of China 2019年第2期18卷 403-412页

作者： HUANG Haiguang HONG feng LIU Jing LIU Chao feng Yuan GUO zhongwen College of Information Science and Engineering Ocean University of China Wenzhou Ocean and Fishery Vessel Safety Rescue Information Center

Vessel Monitoring System(VMS) provides a new opportunity for quantified fishing research. Many approaches have been proposed to recognize fishing activities with VMS trajectories based on the types of fishing vessels. However, one research problem is still calling for solutions, how to identify the fishing vessel type based on only VMS trajectories. This problem is important because it requires the fishing vessel type as a preliminary to recognize fishing activities from VMS trajectories. This paper proposes fishing vessel type identification scheme(FVID) based only on VMS trajectories. FVID exploits feature engineering and machine learning schemes of XGBoost as its two key blocks and classifies fishing vessels into nine types. The dataset contains all the fishing vessel trajectories in the East China Sea in March 2017, including 10031 pre-registered fishing vessels and 1350 unregistered vessels of unknown types. In order to verify type identification accuracy, we first conduct a 4-fold cross-validation on the trajectories of registered fishing vessels. The classification accuracy is 95.42%. We then apply FVID to the unregistered fishing vessels to identify their types. After classifying the unregistered fishing vessel types, their fishing activities are further recognized based upon their types. At last, we calculate and compare the fishing density distribution in the East China Sea before and after applying the unregistered fishing vessels, confirming the importance of type identification of unregistered fishing vessels.

关键词： VMS vessel type identification fishing density trajectory analysis classification

Rapid Phase Ambiguity Elimination Methods for DOA Estimator via Hybrid Massive MIMO Receive Array

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Chinese Journal of Electronics 2023年

作者： ZHAN Xichao SUN zhongwen SHU feng CHEN Yiwen CHENG Xin WU Yuanyuan ZHANG Qi LI Yifan ZHANG Peng Hainan University Nanjing University of Science and Technology

For a sub-connected hybrid multiple-input multiple-output(MIMO) receiver with K subarrays and N antennas, there exists a challenging problem of how to rapidly remove phase ambiguity in only single time-slot. First, a DOA estimator of maximizing received power(Max-RP) is proposed to find the maximum value of K-subarray output powers, where each subarray is in charge of one sector, and the center angle of the sector corresponding to the maximum output is the estimated true DOA. To make an enhancement on precision, MaxRP plus quadratic interpolation(Max-RP-QI) method is designed. In the proposed Max-RP-QI, a quadratic interpolation scheme is adopted to interpolate the three DOA values corresponding to the largest three receive powers of Max-RP. Finally, to achieve the CRLB, a Root-MUSIC plus Max-RP-QI scheme is developed. Simulation results show that the proposed three methods eliminate the phase ambiguity during one time-slot and also show lowcomputational-complexities. In particular, the proposed Root-MUSIC plus Max-RP-QI scheme can reach the CRLB, and the proposed Max-RP and Max-RP-QI are still some performance losses 2d B～4d B compared to the CRLB.

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基于斑马鱼模型的藿香紫苏饮免疫调节功能研究

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食品与发酵科技 2024年第1期60卷 88-92页

作者：徐懿乔宋娟娟周彬冯洁李伟王晨王忠稳曹菁郝江伟黄盼傅雅丽杭州环特生物科技股份有限公司杭州310051 劲牌持正堂药业有限公司黄石435000 中药保健食品质量与安全湖北省重点实验室(劲牌有限公司) 大冶435100 黄石市食品药品检验检测中心黄石435000

研究藿香紫苏饮对由酒石酸长春瑞滨所诱导的免疫力低下斑马鱼的免疫功能的调节作用。通过给斑马鱼静脉注射0.2 mg/mL酒石酸长春瑞滨诱导建立免疫力低下模型,将斑马鱼随机分为正常对照组、模型对照组、藿香紫苏饮低剂量组(500μg/mL)、... 详细信息

研究藿香紫苏饮对由酒石酸长春瑞滨所诱导的免疫力低下斑马鱼的免疫功能的调节作用。通过给斑马鱼静脉注射0.2 mg/mL酒石酸长春瑞滨诱导建立免疫力低下模型,将斑马鱼随机分为正常对照组、模型对照组、藿香紫苏饮低剂量组(500μg/mL)、藿香紫苏饮中剂量组(1 000μg/mL)、藿香紫苏饮高剂量组(2 000μg/mL),每组30尾。使用荧光显微镜观察并分析各组斑马鱼巨噬细胞吞噬功能及T细胞减少的改善效果。结果表明,藿香紫苏饮高剂量组(2 000μg/mL)斑马鱼体内剩余荧光微球数量显著低于模型对照组(P<0.05);藿香紫苏饮低、中、高剂量组斑马鱼T细胞荧光强度显著高于模型对照组(P<0.01)。藿香紫苏饮具有促进斑马鱼巨噬细胞吞噬、改善T细胞减少的功效。

关键词：藿香紫苏饮斑马鱼巨噬细胞 T细胞吞噬