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Interference mitigation and target detection for automotive FMCW radar with range-Doppler sparse regularization

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Science China(Information Sciences) 2024年第9期67卷 342-343页

作者： yan HUANG Yunxuan WANG Xiao ZHOU hui ZHANG Yuan mao Guisheng LIAO Wei HONG State Key Lab of Millimeter Waves Southeast University Department of Computer Science University College London National Key Lab of Radar Signal Processing Xidian University

The invention of vehicles has shaped our modern society and accelerated our economy while causing many tragic incidents simultaneously. Some advanced driver-assistance systems(ADAS) based on surrounding environment se... 详细信息

关键词： Radar interference

BSEC Method for Unveiling Open Clusters and its Application to Gaia DR3:83 New Clusters

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Research in Astronomy and Astrophysics 2024年第5期24卷 169-184页

作者： Zhong-Mu Li Cai-yan mao Institute of Astronomy and Information Dali UniversityDali 671003China

Open clusters(OCs) are common in the Milky Way, but most of them remain undiscovered. There are numerous techniques, including some machine-learning algorithms, available for the exploration of OCs. However, each method has its limitations and therefore, different approaches to discovering OCs hold significant values. We develop a comprehensive approach method to automatically explore the data space and identify potential OC candidates with relatively reliable membership determination. This approach combines the techniques of Hierarchical Density-Based Spatial Clustering of Applications with Noise, Gaussian mixture model, and a novel cluster member identification technique, color excess constraint. The new method exhibits efficiency in detecting OCs while ensuring precise determination of cluster memberships. Because the main feature of this technique is to add an extra constraint(EC) for the members of cluster candidates using the homogeneity of color excess,compared to typical blind search codes, it is called Blind Search-Extra Constraint(BSEC) method. It is successfully applied to the Gaia Data Release 3, and 83 new OCs are found, whose color–magnitude diagrams(CMDs) are fitted well to the isochrones. In addition, this study reports 621 new OC candidates with discernible main sequence or red giant branch. It is shown that BSEC technique can discard some false negatives of previous works, which takes about three percentage of known clusters. It shows that as an EC, the color excess(or twocolor) constraint is useful for removing fake cluster member stars from the clusters that are identified from the positions and proper motions of stars, and getting more precise CMDs, when differential reddening of member stars of a cluster is not large(e.g., ΔE(G_(BP)-G_(RP)) < 0.5 mag). It makes the CMDs of 15% clusters clearer(in particular for the region near turnoff) and therefore is helpful for CMD and stellar population studies. Our result suggests that the color excess con

关键词： Galaxy stellar content-(Galaxy:)open clusters and associations general-stars fundamental parameters

Clinical relevance of distolingual roots and periodontal status in mandibular first molars: a cross-sectional study employing CBCT analysis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第3期25卷 244-253页

作者： Feifei mao Meng WANG Shuai ZHOU yan ZHAO Jiaping HUANG Fengying YIN Haiping yanG Pei-hui DING Stomatology Hospital School of StomatologyZhejiang University School of MedicineZhejiang Provincial Clinical Research Center for Oral DiseasesKey Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhou 310016China

Objectives:Distolingual root of the permanent mandibular first molar(PMFM-DLR)has been frequently reported,which may complicate the treatment of *** study aimed to assess the morphological features of PMFM-DLR and investigate the correlation between the morphological features of PMFM-DLR and periodontal status in patients with Eastern Chinese ethnic *** and methods:A total of 836 cone beam computed tomography(CBCT)images with 1497 mandibular first molars were analyzed to observe the prevalence of PMFM-DLR at the patients and tooth levels in Eastern *** them,complete periodontal charts were available for 69 Chinese patients with 103 *** and regression analyses were used to evaluate the correlation between the morphological features of DLR,bone loss,and periodontal clinical parameters,including clinical attachment loss(CAL),probing pocket depth(PPD),gingival recession(GR),and furcation involvement(FI).Results:The patient-level prevalence and tooth-level prevalence of DLR in mandibular first molars were 29.4%and 26.3%,*** linear regression analysis suggested that bone loss at the lingual site and CAL were negatively affected by the angle of separation between distolingual and mesial roots in the transverse section,while they were significantly influenced by age and the angle of separation between distobuccal and mesial roots in the coronal ***:The prevalence of PMFM-DLR in Eastern China was relatively high in our *** morphological features of DLR were correlated with the periodontal status of mandibular first *** study provides critical information on the morphological features of DLR for improved diagnosis and treatment options of mandibular molars with DLR.

关键词： Distolingual root Mandibular first molar Periodontal clinical parameter Clinical attachment loss Cone beam computed tomography(CBCT)

Trend of glaucoma internal filtration surgeries in a tertiary hospital in China

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International Journal of Ophthalmology(English edition) 2023年第2期16卷 251-259页

作者： yang Cao Hai-Shuang Lin hui-yan mao Yin Zhao yan-Qian Xie Shao-Dan Zhang Qi Zhang Pei-Juan Wang Guo-Xing Li Ai-Wu Fang Yuan-Bo Liang The Eye Hospital School of Ophthalmology and OptometryWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina Glaucoma Research Institute Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Wenzhou 325027Zhejiang ProvinceChina

AIM:To evaluate the trend of glaucoma internal filtration surgeries for inpatients between 2015 and 2021 at the Eye Hospital of Wenzhou Medical ***:A review of the medical records of inpatients who had been diagnosed with glaucoma and received antiglaucoma surgery between January 1,2015 and December 31,2021 was *** glaucoma diagnosis in this study included primary open angle glaucoma,primary angleclosure glaucoma,secondary glaucoma,and paediatric *** types of surgeries were categorised as internal filtration,external filtration,and cyclodestruction surgery based on the pathway of aqueous humor *** trend of these glaucoma surgeries in the sample of patients with different types of glaucoma was then ***:The number of patients hospitalised for glaucoma surgery increased yearly,from 752 in 2015 to 1373 in 2021,at the Eye Hospital of Wenzhou Medical *** the patients diagnosed with primary open angle glaucoma,internal filtration surgery increased from 27.40%of the sample to 54.40%of the sample,while external filtration surgery decreased from 71.50%to 44.20%between 2015 and *** paediatric glaucoma,internal filtration surgery increased from 37.50%in 2015 to 88.20%in *** different types of surgeries were performed on the sample of patients with secondary glaucoma,the proportion of internal filtration surgery also showed an increase from 18.20%in 2015 to 40.90%in ***,internal filtration surgery in the patient sample with primary angle-closure glaucoma already accounted for over 70.00%in 2015,and showed a small increase by ***:As surgical technology and surgical experience continue to elevate and improve,the range of glaucoma surgeries are correspondingly *** study find that internal filtration surgeries accounted for an increasing proportion of treatments in the surgical management of glaucoma between 2015 and 2021.

关键词： glaucoma internal filtration surgery inpatient trend

Theoretical screening of cooperative N-bridged dual-atom sites for efficient electrocatalytic nitrogen reduction with remolding insight

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Nano Research 2024年第4期17卷 3413-3422页

作者： huimei Chen yan yang Chi Jiao Zhiwen Zhuo Junjie mao yan Liu Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China

The electrocatalytic nitrogen reduction reaction(e-NRR)is a promising alternative method for the Haber–Bosch ***,it still faces many challenges in searching for high activity,stability,and selectivity catalysts and ascertaining the catalytic mechanism with complete ***,a series of graphene-based N-bridged dual-atom catalysts(M1-N-M2/NC)are systematically investigated via first-principle calculation and a high-throughput screening *** result unveils that N_(2) adsorption on M1-N-M2/NC in bridge-on adsorption mode can effectively break the scaling relationship on single-atom catalysts(SACs).Moreover,V-N-Ru/NC and V-N-Os/NC are systematically screened out as promising e-NRR catalysts,with extremely low limiting potentials of-0.20 and-0.18 V,***,the adsorption site competition between*N_(2) and*H,as well as the competitive twin reactions of hydrogen evolution reaction(HER)on intermediates(N_(n)H_(m))during the e-NRR process,is systematically evaluated to form a remodeling insight for the reactions in mechanism,and the e-NRR of new proposed dual-atom catalysts(DACs)is strategically optimized for its high-efficiency performance potential via our remolding insight in e-NRR *** work provides new ideas and insights for the design and mechanism of e-NRR catalysts and an effective strategy for rapidly screening highly efficient e-NRR catalysts.

关键词： nitrogen reduction dual-atom catalysts high-throughput screening hydrogen evolution reaction density functional theory calculations

Autoimmune encephalitis after surgery for appendiceal cancer:A case report

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World Journal of Clinical Cases 2023年第11期11卷 2576-2581页

作者： yan-hui mao Lu Li Li-Ming Wen Jia-Min Qin Ya-Ling yang Li Wang Fan-Rong Wang Yi-Zhou Zhao Department of Gastroenterology Sichuan Mianyang 404 HospitalMianyang 621000Sichuan ProvinceChina Department of Pathology Sichuan Mianyang 404 HospitalMianyang 621000Sichuan ProvinceChina Department of Medical Imaging Sichuan Mianyang 404 HospitalMianyang 621000Sichuan ProvinceChina

BACKGROUND Primary cancer of the appendix is rare and often difficult to diagnose preoperatively due to the lack of specific clinical symptoms. Autoimmune encephalitis(AIE) is the most common cause of non-infectious encephalitis. The etiologies of AIE include tumors(paraneoplastic), infections(parainfections), or recessive infections. The tumors that have been reported to cause AIE include thymomas, ovarian teratomas, lung cancers, and breast cancers. However, there are no reports of AIE occurring after surgery for appendiceal cancer. This report describes the diagnosis and treatment of a patient with an appendiceal cancer and postoperative *** SUMMARY We report the case of a 47-year-old man who was transferred to our hospital due to a recurrent low intestinal obstruction. Abdominal enhanced computed tomography was used to consider the possibility of a terminal ileal tumor with serous infiltration and lymph node metastasis. A right hemi-colectomy was performed under general anesthesia with an ileo-transcolon anastomosis and laparoscopic exploration. The postoperative pathologic evaluation revealed a high-grade goblet cell carcinoma of the appendix, accompanied by mesangial and abdominal lymph node metastases, and neural tube and vascular infiltration. The operation was completed without complication. The patient developed restlessness on postoperative day 4, and gradually developed a disturbance of consciousness on postoperative day 6. He was transferred to West China Hospital of Sichuan University and diagnosed with *** Albeit rare, the occurrence of neurologic and psychiatric symptoms in patients with an appendiceal cancer postoperatively suggests the possibility of AIE.

关键词： Appendiceal cancer Goblet cell carcinoma Repeated ileus Postoperative Autoimmune encephalitis Case report

Multi-scale collaborative design method for macroscopic thermal optimization and mesoscopic woven structure of hypersonic vehicle's TOCMC leading edge

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Chinese Journal of Aeronautics 2024年第4期37卷 524-541页

作者： Chenwei ZHAO Zecan TU Junkui mao Jian hui Pingting CHEN College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 21016China Integrated Energy Institute Nanjing University of Aeronautics and AstronauticsNanjing 210016China

A new thermal protection design method for hypersonic vehicle's leading edge is proposed, which can effectively reduce temperature of the leading edge without additional cooling measures. This method reduces the leading-edge's temperature by the multi-scale collaborative design of the macroscopic thermal optimization and the mesoscopic woven structures of Three-dimensional Orthogonal Woven Ceramic Matrix Composites(TOCMC). The macroscopic thermal optimization is achieved by designing different mesoscopic woven structures in different regions to create combined heat transfer channels to dredge the heat. The combined heat transfer channel is macroscopically represented by the anisotropic thermal conductivity of TOCMC. The thermal optimization multiple linear regression model is established to optimize the heat transport channel, which predicts Theoretical Optimal Thermal Conductivity Configuration(TOTCC) in different regions to achieve the lowest leading-edge temperature. The function-oriented mesostructure design method is invented to design the corresponding mesostructure of TOCMC according to the TOTCC, which consists of universal thermal conductivity prediction formulas for TOCMC. These universal formulas are firstly derived based on the thermal resistance network method, which is verified by experiments with an error of 6.25%. The results show that the collaborative design method can effectively reduce the leading edge temperature by about 12.8% without adding cooling measures.

关键词： Multi-scale collaborative design Thermal optimization Ceramic matrix composite Hypersonic vehicle Thermal protection Intelligent optimization

Research progress on natural products against hepatocellular carcinoma

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BIOCELL 2024年第6期48卷 905-922页

作者： LINGLI ZHANG yan LI JINGXIN mao Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System Chongqing Medical and Pharmaceutical CollegeChongqing400030China Provincial Key Laboratory of Pharmaceutical Bioactive Substances School of Life Sciences and BiopharmaceuticalsGuangdong Pharmaceutical UniversityGuangzhou510006China

Hepatocellular carcinoma(HCC)remains a prevalent and challenging malignancy globally,characterized by its numerous causal factors and generally unfavorable *** the relentless pursuit of effective treatment modalities,natural products have emerged as a promising and relatively non-toxic alternative,garnering signiﬁcant *** integration of natural products with contemporary medical research has yielded encouraging therapeutic outcomes in the management of *** review offers a comprehensive overview of the causal factors underlying HCC,and the diverse treatment options available,and highlights the advancements made by natural products in anti-HCC ***,we provide an outline of the various types of natural products,their corresponding nomenclature,target molecules,and mechanisms of action that exhibit anti-HCC *** products are anticipated to play a pivotal role in future comprehensive treatment plans for liver cancer,potentially offering patients improved survival rates and an enhanced quality of life.

关键词： Hepatocellular carcinoma Natural products Targets Research progress Drug

The hard X-ray nanoprobe beamline at the SSRF

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Nuclear Science and Techniques 2024年第7期35卷 79-88页

作者： yan He hui Jiang Dong-Xu Liang Zhi-Sen Jiang Huai-Na Yu Hua Wang Cheng-Wen mao Jia-Nan Xie Ai-Guo Li Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai201210China

The hard X-ray nanoprobe beamline BL13U is a phase-Ⅱ beamline project at the Shanghai Synchrotron Radiation *** beamline aims to enable comprehensive experiments at high spatial resolutions ranging from 50 to 10 nm. The X-ray energy range of the beamline, 5–25 keV, can detect most elements in the periodic table. Two operating modes were designed to accommodate the experimental requirements of high-energy resolution or high photon flux, respectively. X-ray nanofluorescence, nanodiffraction, and coherent diffraction imaging are developed as the main experimental techniques for BL13U. This paper describes the beamline optics, end station configurations, experimental methods under development, and preliminary test results. This comprehensive overview aims to provide a clear understanding of the beamline capabilities and potential applications.

关键词： Shanghai synchrotron radiation facility Hard X-ray nanoprobe X-ray nanofocusing