检索结果-南通市图书馆

China Today 2024年第7期73卷 74-78页

作者： MENG JIAXIN 不详

With a history of more than 800 years,Lijiang boasts picturesque sceneries,diverse cultures,and an abundance of well-preserved historical sites.THE old town of Lijiang,also known as the town of Dayan,is located in Gucheng District in Lijiang City,southwest China’s Yunnan Province.The current structures of the town can be traced back to the end of the Song Dynasty(960-1279)and the early era of the Yuan Dynasty(1271-1368).

关键词： Province. southwest scene

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

2,000,000 fps 2D and 3D imaging of periodic or reproducible scenes with single-pixel detectors

引用

Photonics Research 2022年第9期10卷 2157-2164页

作者： WENJIE JIANG YONGKAI YIN JUNPENG JIAO XIAN ZHAO BAOQING SUN School of Information Science and Engineering Shandong UniversityQingdao 266237China Key Laboratory of Laser&Infrared System Ministry of EducationQingdao 266237China Center for Optics Research and Engineering Shandong UniversityQingdao 266237China

Single-pixel imaging(SPI)can capture 2D images of the target with only a nonpixelated detector,showing promising application potential in nonvisible spectral imaging,low-photon imaging,lidar,and other extreme imaging fields.However,the imaging mechanism of traditional SPI makes it difficult to achieve high imaging speed,which is a primary barrier for its widespread application.To address this issue,in this work,we propose and demonstrate a novel high-speed 2D and 3D imaging scheme based on traditional SPI,termed time-resolved single-pixel imaging(TRSPI).Previous SPI works mainly utilize correlation between a stable target and iterative illumination masks to reconstruct a single image.In TRSPI,by further exploiting correlation information between a dynamic scene and every static mask,we can reconstruct a series of time-varying images of the dynamic scene,given the dynamic scene is repetitive or reproducible.Experimentally,we conducted 2D and 3D imaging on a rotating chopper with a speed of 4800 revolutions per minute(rpm),and imaging speeds up to 2,000,000 fps.It is believed that this technology not only opens up a novel application direction for SPI,but also will provide a powerful solution for high-speed imaging.

关键词： SPI utilize scene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Object detection in crowded scenes via joint prediction

引用

Defence Technology（防务技术） 2023年第3期21卷 103-115页

作者： Hong-hui Xu Xin-qing Wang Dong Wang Bao-guo Duan Ting Rui Department of Mechanical Engineering College of Field EngineeringArmy Engineering University of PLANanjing210007China

Detecting highly-overlapped objects in crowded scenes remains a challenging problem,especially for one-stage detector.In this paper,we extricate YOLOv4 from the dilemma in a crowd by fine-tuning its detection scheme,named YOLO-CS.Specifically,we give YOLOv4 the power to detect multiple objects in one cell.Center to our method is the carefully designed joint prediction scheme,which is executed through an assignment of bounding boxes and a joint loss.Equipped with the derived joint-object augmentation(DJA),refined regression loss(RL)and Score-NMS(SN),YOLO-CS achieves competitive detection performance on CrowdHuman and CityPersons benchmarks compared with state-of-the-art detectors at the cost of little time.Furthermore,on the widely used general benchmark COCO,YOLOCS still has a good performance,indicating its robustness to various scenes.

关键词： tuning prediction scene

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

scene

引用

人口与计划生育 2012年第4期 65-65页

河北省任县任城镇计生办开展"‘民心工程’村村行"主题宣传活动,为已婚育龄妇女免费进行生殖健康检查。(杨增军摄)

关键词：计生办上马墩街道 scene

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A Survey of 3D Indoor scene Synthesis

引用

Journal of Computer Science & Technology 2019年第3期34卷 594-608页

作者： Song-Hai Zhang Shao-Kui Zhang Yuan Liang Peter Hall Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology(BNRist) Beijing 100084China Department of Computer Science University of BathClaverton DownBathBA2 7AYU.K.

Indoor scene synthesis has become a popular topic in recent years.Synthesizing functional and plausible indoor scenes is an inherently difficult task since it requires considerable knowledge to both choose reasonable object categories and arrange objects appropriately.In this survey,we propose four criteria which group a wide range of 3D(three-dimensional)indoor scene synthesis techniques according to various aspects(specifically,four groups of categories).It also provides hints,througli comprehensively comparing all the techniques to demonstrate their effectiveness and drawbacks,and discussions of potential remaining problems.

关键词： content generation indoor scene synthesis layout arrangement probabilistic model

来源：

维普期刊数据库评论