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Research 2022年第4期2022卷 333-345页

作者： Hongquan Zhao Guoxing Zhang Bing Yan Bo Ning chunxiang wang Yang Zhao Xuan Shi Chongqing Institute of Green and Inteligent Technology Chinese Academy of SciencesChina University of Chinese Academy of Sciences Bejing 100064China Chongqing University of Posts and Telecommunications Chongqing 400065China

Doping in 2D materials is an important method for tuning of band structures.For this purpose,it is important to develop controllable doping techniques.Here,we demonstrate a substitutional doping strategy by erbium(Er)ions in the synthesis of monolayer WS2 by chemical vapor deposition.Substantial enhancements in photoluminescent and photoresponsive properties are achieved,which indicate a tungsten vacancy suppression mechanism by Er filling.Er ion doping in the monolayer WS2 is proved by X-ray diffraction(XRD)and X-ray photoelectron spectra(XPS),fluorescence,absorption,excitation,and Raman spectra.11.5 at%of the maximum Er concentration is examined by energy dispersive X-ray spectroscopy(EDX).Over 6 times enhancement of intensities with 7.9 nm redshift in peaks are observed from the fluorescent spectra of Er-doped WS2 monolayers compared with their counterparts of the pristine WS2 monolayers,which agrees well with the density functional theory calculations.In addition,over 11 times of dark current,469 times of photocurrents,photoresponsivity,and external quantum efficiency,and two orders of photoresponse speed are demonstrated from the Er-doped WS2 photodetector compared with those of the pristine WS2 device.Our findings prove rare-earth doping in 2D materials,the exciting and ideal technique for substantially enhanced photoluminescent and photoresponsive properties.

关键词： excitation vacancy rare

Cy-CNN: cylinder convolution based rotation-invariant neural network for point cloud registration

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Science China(Information Sciences) 2023年第5期66卷 73-87页

作者： Hengwang ZHAO Zhidong LIANG Yuesheng HE chunxiang wang Ming YANG Department of Automation Shanghai Jiao Tong University Research Institute of Robotics Shanghai Jiao Tong University

Point cloud registration is a challenging problem in the condition of large initial misalignments and noises. A major problem encountered in the registration algorithms is the definition of correspondence between two point clouds. Point clouds contain rich geometric information and the same geometric structure implies the same feature even if they are in diferent poses, which motivates us to seek a rotation-invariant feature representation for calculating the correspondence. This work proposes a rotation-invariant neural network for point cloud registration. To acquire rotation-invariant features, we firstly propose a rotationinvariant point cloud representation(RIPR) at the input level. Instead of using the original coordinates,we propose to use point pair features(PPF) and the transformed coordinates in the local reference frame(LRF) to represent a point. Then, we design a new convolution operator named Cylinder-Conv which utilizes the symmetry of cylinder-shaped voxels and the hierarchical geometry information of the surface of3D shapes. By specifying the cylinder-shaped structures and directions, Cylinder-Conv can better capture the local neighborhood geometry of each point and maintain rotation-invariance. Finally, we combine RIPR and Cylinder-Conv to extract normalized rotation-invariant features to generate the correspondence and perform a diferentiable singular value decomposition(SVD) step to estimate the rigid transformation. The proposed network presents state-of-the-art performance on point cloud registration. Experiments show that our method is robust to initial misalignments and noises.

关键词： deep learning point cloud registration rotation invariant computer vision

Fusing Geometrical and Visual Information via Superpoints for the Semantic Segmentation of 3D Road Scenes

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Tsinghua Science and Technology 2020年第4期25卷 498-507页

作者： Liuyuan Deng Ming Yang Zhidong Liang Yuesheng He chunxiang wang the Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China the Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240China the Research Institute of Robotics Shanghai Jiao Tong UniversityShanghai 200240China

This paper addresses the problem of the semantic segmentation of large-scale 3D road scenes by incorporating the complementary advantages of point clouds and images.To make full use of geometrical and visual information,this paper extracts 3D geometric features from a point cloud using a deep neural network for 3D semantic segmentation and extracts 2D visual features from images using a Convolutional Neural Network(CNN)for 2D semantic segmentation.In order to bridge the features of the two modalities,this paper uses superpoints as an intermediate representation to connect the 2D features with the 3D features.A superpoint-based pooling method is proposed to fuse the features from the two different modalities for joint learning.To evaluate the approach,the paper generates 3D scenes from the Virtual KITTI dataset.The results of the experiments demonstrate that the proposed approach is capable of segmenting large-scale 3D road scenes based on the compact and semantically homogeneous superpoints,and that it achieves considerable improvements over the 2D image and 3D point cloud semantic segmentation methods.

关键词： scene understanding point cloud semantic segmentation multi-modal information fusion deep learning

End-to-end learning for high-precision lane keeping via multi-state model

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CAAI Transactions on Intelligence Technology 2018年第4期3卷 185-190页

作者： Wei Yuan Ming Yang Hao Li chunxiang wang Bing wang Department of Automation Key Laboratory of System Control and Information ProcessingShanghai Jiao Tong UniversityMinistry of Education of ChinaShanghai 200240People’s Republic of China Department of Automation & SJTU-ParisTech Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

High-precision lane keeping is essential for the future autonomous driving.However,due to the imbalanced and inaccurate datasets collected by human drivers,current end-to-end driving models have poor lane keeping the effect.To improve the precision of lane keeping,this study presents a novel multi-state model-based end-to-end lane keeping method.First,three driving states will be defined:going straight,turning right and turning left.Second,the finite-state machine(FSM)table as well as three kinds of training datasets will be generated based on the three driving states.Instead of collecting the dataset by human drivers,the accurate dataset will be collected by the high-performance path following controller.Third,three sets of parameters based on 3DCNN-LSTM model will be trained for going straight,turning left and turning right,which will be combined with FSM table to form a multi-state model.This study evaluates the multi-state model by testing it on five tracks and recording the lane keeping error.The result shows the multi-state model-based end-to-end method performs the higher precision of lane keeping than the traditional single end-to-end model.

关键词： High-precision lane keeping

红色金融的最高尊严——中华苏维埃共和国国家银行玉印

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南方文物 2024年第2期 265-269,274页

作者：袁兴钱汪春翔罗敏江西省博物馆江西师范大学瑞金中央革命根据地纪念馆

1931年11月,中华苏维埃共和国成立。1932年2月,中华苏维埃共和国国家银行宣告成立,与此同时制备了中华苏维埃共和国国家银行玉印。此枚小小的苏维埃国家银行印章代表着红色金融管理机构的最高职权,在中央苏区及其所属省、县苏区建立银... 详细信息

1931年11月,中华苏维埃共和国成立。1932年2月,中华苏维埃共和国国家银行宣告成立,与此同时制备了中华苏维埃共和国国家银行玉印。此枚小小的苏维埃国家银行印章代表着红色金融管理机构的最高职权,在中央苏区及其所属省、县苏区建立银行机构,统一货币和财政收支等工作中发挥了不可替代的作用。如今这枚印章在瑞金中央革命根据地纪念馆的展柜里,仿佛依然在向世人诉说土地革命时期中国共产党在金融战线探索实践的伟大历程。

关键词：苏维埃国家银行玉印红色金融

Giant renal angiomyolipoma with tuberous sclerosis complex

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Frontiers of Medicine 2009年第4期3卷 495-498页

作者： Ouyan SHI Guodong XU chunxiang wang Faculty of Basic Medicine Tianjin Medical UniversityTianjin 300070China Department of Pediatric Surgery Tianjin Children’s HospitalTianjin 300070China

Though rare,angiomyolipomas(AMLs)are the most common mesenchymal tumors of kidney.In general,AMLs can always be associated with two conditions affecting other organ systems:tuberous sclero-sis complex(TSC)and sporadic lymphangioleiomyoma-tosis.This article presents a case of renal AML occurring in a 14-year-old girl with a deﬁnite diagnosis of TSC.She had been diagnosed with TSC at the age of three,and a schedule for close observation was disobeyed.At this time,she underwent a series of examinations:physical examina-tion,ultrasonography,angiography,computed tomography(CT),and magnetic resonance imaging(MRI)scans.The physical examination showed adenoma sebaceum in a butterﬂy paranasal distribution,and a mass was palpated in the left upper quadrant.There were no neurological deﬁcits.Imaging studies(including ultrasonography,angiography,CT,and MRI)of the abdomen showed a large heterogeneous mass arising from the left kidney.Partial nephrectomy was performed.The pathological diagnosis was hemorrhagic renal AML.No recurrence was found in the three-year follow-up.We concluded that schedule of close observation on patients with TSC should be strictly abided by for the high morbidity of AMLs.The speciﬁc risks of renal AMLs are spontaneous hemorrhage and rupture.Treatment options for AMLs include conservative and interventional(total/partial nephrectomy,cryoptherapy,and embolization)treatments.

关键词： renal angiomyolipoma tuberous sclerosis complex hemorrhage

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新生儿大脑-肋骨-下颌综合征1例

中国医学影像技术 2024年第3期40卷 471-472页

作者：门玥琪孙焱王春祥天津市儿童医院(天津大学儿童医院)医学影像科天津300134

患儿男,生后1天,娩出时胎龄39周,出生体质量3.23kg,下颌小、腭裂,伴吐沫、吸气性喉鸣;孕妇妊娠期间未接受规律产前检查,患儿无生后窒息史或相关家族史。查体:肛温36.5℃,呼吸45次/分,脉搏130次/分,血压65/35 mmHg,血氧饱和度96%;下颌后... 详细信息

患儿男,生后1天,娩出时胎龄39周,出生体质量3.23kg,下颌小、腭裂,伴吐沫、吸气性喉鸣;孕妇妊娠期间未接受规律产前检查,患儿无生后窒息史或相关家族史。查体:肛温36.5℃,呼吸45次/分,脉搏130次/分,血压65/35 mmHg,血氧饱和度96%;下颌后缩,上腭见宽大裂隙,舌根后坠;双侧胸廓随呼吸起伏一致,双肺呼吸音粗,闻及湿啰音;心前区未闻及明显杂音;肠鸣音存在;四肢活动可。

关键词：大脑-肋骨-下颌综合征体层摄影术,X线计算机

Airway Obstruction Caused by Neck Teratoma in an Infant: Case Report and Literature Review

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Chinese Journal of Clinical Oncology 2007年第4期4卷 282-284页

作者： Chunquan Cai Jizhong wang chunxiang wang Hui Feng Department of Surgery Tianjin Children＇s Hospital Tianjin 300074 China. Department of Radiology Tianjin Children＇s Hospital Tianjin 300074 China.

Teratomas are congenital tumors that derive from all 3 germ lay- ers. Most teratomas of the head and neck present in the pediatric- age group. We report a case of a 5-month-old infant who presented with a teratoma

关键词：颈部肿瘤畸胎瘤气道阻塞治疗方法

革命文物主题游径的设计探索及建设路径研究——以江西革命老区为例

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老区建设 2024年第4期 73-80页

作者：汪春翔康艳丽江西师范大学苏区振兴研究院江西师范大学马克思主义学院

革命文物主题游径建设是深入贯彻落实习近平文化思想、弘扬革命文化和社会主义先进文化的必然要求和生动实践。作为革命文化、革命精神的物质载体,革命文物承载着中国共产党和人民的革命行动、民族精神和时代诉求。富有光荣革命传统的... 详细信息

革命文物主题游径建设是深入贯彻落实习近平文化思想、弘扬革命文化和社会主义先进文化的必然要求和生动实践。作为革命文化、革命精神的物质载体,革命文物承载着中国共产党和人民的革命行动、民族精神和时代诉求。富有光荣革命传统的江西革命老区,革命文物资源丰富,要从加强主题研究阐释、合理释放文物资源、创新活化利用形式、完善公共服务设施、唱响特色文化品牌等方面充分活化利用好革命文物资源,高质量推进“四大摇篮”“建军大业”“可爱的中国”“毛主席调查研究”“中央红军长征集结出发地”等革命文物主题游径建设,为奋力谱写中国式现代化江西篇章贡献文化力量。

关键词：革命文物主题游径江西省革命老区实践路径

老年急性胰腺炎患者临床特征的单中心回顾性研究

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中国现代医生 2024年第19期62卷 84-88页

作者：张朋飞王春香蒋丰娟扬州大学附属江都人民医院消化内科江苏扬州225000

目的探讨老年急性胰腺炎(acute pancreatitis,AP)患者的临床特征,为老年AP患者的防治提供依据。方法收集2021年3月至2023年3月于扬州大学附属江都人民医院诊治的AP患者的临床资料,根据年龄将其分为老年组(年龄≥65岁,167例)和非老年组... 详细信息

目的探讨老年急性胰腺炎(acute pancreatitis,AP)患者的临床特征,为老年AP患者的防治提供依据。方法收集2021年3月至2023年3月于扬州大学附属江都人民医院诊治的AP患者的临床资料,根据年龄将其分为老年组(年龄≥65岁,167例)和非老年组(年龄<65岁,303例)。比较两组患者的临床特征、生化指标、死亡率、重症监护病房(intensive care unit,ICU)住院率、住院时间、Ranson评分、查尔森合并症指数(Charlson comorbidity index,CCI)等。结果老年组患者的年龄显著大于非老年组,乳酸脱氢酶、天冬氨酸转氨酶、血清淀粉酶、Ranson评分和心血管合并症、肺部合并症、神经系统合并症、CCI≥2的比例及黄疸发生率均显著高于非老年组(P<0.05),老年组患者的死亡率、ICU住院率均显著高于非老年组,住院时间显著长于非老年组(P<0.05)。多因素分析结果显示,年龄≥65岁、Ranson评分≥3分、CCI≥2、胰腺坏死均是AP患者死亡和进入ICU的独立危险因素(P<0.05),年龄≥65岁、胰腺坏死、胆源性病因是住院时间延长的独立危险因素(P<0.05)。结论与中青年患者相比,老年AP患者的死亡率、ICU住院率较高,住院时间延长,早期识别和及时治疗是改善老年AP患者预后的关键因素。

关键词：急性胰腺炎老年人死亡重症监护病房住院时间