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Dual-stream coupling network with wavelet transform for cross-resolution person re-identification

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Journal of Systems Engineering and Electronics 2023年第3期34卷 682-695页

作者： SUN Rui YANG Zi ZHAO Zhenghui zhang xudong Key Laboratory of Knowledge Engineering with Big Data(Ministry of Education) Hefei University of TechnologyHefei 230601China School of Computer and Information Hefei University of TechnologyHefei 230601China

Person re-identification is a prevalent technology deployed on intelligent surveillance.There have been remarkable achievements in person re-identification methods based on the assumption that all person images have a sufficiently high resolution,yet such models are not applicable to the open world.In real world,the changing distance between pedestrians and the camera renders the resolution of pedestrians captured by the camera inconsistent.When low-resolution(LR)images in the query set are matched with high-resolution(HR)images in the gallery set,it degrades the performance of the pedestrian matching task due to the absent pedestrian critical information in LR images.To address the above issues,we present a dualstream coupling network with wavelet transform(DSCWT)for the cross-resolution person re-identification task.Firstly,we use the multi-resolution analysis principle of wavelet transform to separately process the low-frequency and high-frequency regions of LR images,which is applied to restore the lost detail information of LR images.Then,we devise a residual knowledge constrained loss function that transfers knowledge between the two streams of LR images and HR images for accessing pedestrian invariant features at various resolutions.Extensive qualitative and quantitative experiments across four benchmark datasets verify the superiority of the proposed approach.

关键词： cross-resolution feature invariant learning person re-identification residual knowledge transfer wavelet transform

师范生手机依赖对学业挫折感的影响:一个有调节的中介模型

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肇庆学院学报 2024年第2期45卷 85-93页

作者：陈晓丹张旭东肇庆学院教育科学学院广东肇庆526061

为探寻师范生手机依赖与学业挫折感的关系,考察人生意义的中介作用和自我管理能力的调节作用,采用手机依赖性量表、自我管理能力量表、青年学生学业挫折感问卷和人生意义量表对广东省普通高等院校628名师范生进行调查.结果表明:(1)师范... 详细信息

为探寻师范生手机依赖与学业挫折感的关系,考察人生意义的中介作用和自我管理能力的调节作用,采用手机依赖性量表、自我管理能力量表、青年学生学业挫折感问卷和人生意义量表对广东省普通高等院校628名师范生进行调查.结果表明:(1)师范生手机依赖可显著正向预测学业挫折感,人生意义与自我管理能力可显著负向预测学业挫折感;(2)师范生人生意义在手机依赖和学业挫折感之间起部分中介作用;(3)师范生自我管理能力在人生意义与学业挫折感之间、手机依赖与学业挫折感之间起调节作用.

关键词：师范生手机依赖学业挫折感人生意义自我管理能力中介模型

A survey of unmanned aerial vehicle flight data anomaly detection:Technologies,applications,and future directions

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Science China(Technological Sciences) 2023年第4期66卷 901-919页

作者： YANG Lei LI ShaoBo LI ChuanJiang zhang AnSi zhang xudong School of Mechanical Engineering Guizhou UniversityGuiyang 550025China State Key Laboratory of Public Big Data Guizhou UniversityGuiyang 550025China

Flight data anomaly detection plays an imperative role in the safety and maintenance of unmanned aerial vehicles(UAVs).It has attracted extensive attention from researchers.However,the problems related to the difficulty in obtaining abnormal data,low model accuracy,and high calculation cost have led to severe challenges with respect to its practical applications.Hence,in this study,firstly,several UAV flight data simulation softwares are presented based on a brief presentation of the basic concepts of anomalies,the contents of UAV flight data,and the public datasets for flight data anomaly detection.Then,anomaly detection technologies for UAV flight data are comprehensively reviewed,including knowledge-based,model-based,and data-driven methods.Next,UAV flight data anomaly detection applications are briefly described and analyzed.Finally,the future trends and directions of UAV flight data anomaly detection are summarized and prospected,which aims to provide references for the following research.

关键词： unmanned aerial vehicle(UAV) flight data anomaly detection data-driven

Simultaneous acquisition of Fe3O4 monocrystals:Tunable magnetic properties with various morphologies

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Progress in Natural Science:Materials International 2020年第1期30卷 41-46页

作者： Zemin Zheng Yiming Cao Zhe Li Huiyong Li Dafeng Hu Hao Jiang Xuemin Geng Jiangwei Lu xudong zhang Peng Yang Yanfen Wan School of Materials Science and Engineering Yunnan Key Laboratory for Micro/nano Materials & TechnologyYunnan University Center for Magnetic Materials and Devices & Key Laboratory for Advanced Functional and Low Dimensional Materials of Yunnan Higher Education Institute Qujing Normal University

Fe3O4nanoparticles(NPs) with a face-centered cubic(fcc) structure and two different morphologies(nanospheres and nanoprisms) were synthesized by a facile one-step method.The synthesized Fe3O4nanospheres and nanoprisms were monocrystalline and separable in a magnetic field.In different volume ratios of oleylamine(OAm) to dibenzyl ether,the sizes of the prepared Fe3O4NPs ranged from 5 to 21 nm.The OAm amount in the synthesis can significantly control the morphology of Fe3O4NPs.As the OAm content increased from 10 ml to 30 ml,the faceted nanoprisms shrank while the nanospheres enlarged.At an OAm content of 25 ml,the nanoprisms diminished while more hexagonal and sphere-like particles appeared,implying a critical point of morphology transition from triangle to hexagon.The magnetic properties also depended on the NP morphology and size.The prepared Fe3O4NPs are promising candidates in medical applications such as magnetic resonance imaging,targeted drug delivery,blood purification,and tumor hyperthermia.

关键词： Fe 3 O 4 Nanoparticles Nanoprism Nanosphere Superparamagnetic

Experimental study on grain size and soluble salt of saline soil in western Jilin Province, China

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Research in Cold and Arid Regions 2015年第5期7卷 573-578页

作者： Tian Wen Yu Qing Wang xudong zhang Xin Zhou Gang Wang CenCen Niu College of Construction Engineering Jilin University

Western Jilin Province is a typical seasonal frost region, and is also one of the severest salinization areas of China. In this study, we aim to examine the saline soil in Da＇an and Wukesong areas, western Jilin Province, and mainly analyze the granulometric composition and distribution of salt in soil profiles. Four sampling sites, two in Da＇an and two in Wukesong respectively, are chosen for study. The granulometric composition, especially silt and clay content change in different sites and soil depths are analyzed. Analysis of total and components of soluble salt shows that the surface soil is weak carbonate saline, in which the main cation is Na＋ and the main anion is HCO3-. The total amount of soluble salt presents a decreasing tendency with increasing depth. The comprehensive analysis ofgranulometric composition and soluble salt shows that the clay content and soluble salt content present similar variation tendency with an increase of depth.

关键词： saline soil grain size soluble salt

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患者报告结局在淋巴瘤临床研究中的应用进展

中国综合临床 2024年第2期40卷 133-138页

作者：赵婉越钱思宇宋云飞常宇笑张旭东郑州大学第一附属医院肿瘤科郑州450052

随着生物-心理-社会医学模式备受重视,患者报告结局取得了重大进展。现通过综合分析和总结领域内的文献,探讨患者报告结局在淋巴瘤临床研究中的应用进展,旨在为未来的相关研究提供有益参考。

关键词：淋巴瘤患者报告结局健康相关生命质量

基于SAFETI软件的煤层气管道高后果区风险定量分析研究

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工业安全与环保 2024年第1期50卷 63-65页

作者：张玉涛张哲武洋张旭东中海油安全技术服务有限公司天津300457 天津北海油人力资源咨询服务有限公司天津300457

以某煤层气管道高后果区为例,采用SAFETI软件计算该区域内的个人风险和社会风险。结果表明,有2处单位的个人风险超过可接受水平,企业应采取必要的风险减缓措施;社会风险F-N曲线全部处于“尽可能降低区”,可结合实际情况采取适当措施降... 详细信息

以某煤层气管道高后果区为例,采用SAFETI软件计算该区域内的个人风险和社会风险。结果表明,有2处单位的个人风险超过可接受水平,企业应采取必要的风险减缓措施;社会风险F-N曲线全部处于“尽可能降低区”,可结合实际情况采取适当措施降低风险。本文在定量计算时考虑极端工况,计算结果相对保守,若有更加详细的资料可以开展多种场景的模拟计算,计算结果将更加具体和准确。

关键词：煤层气长输管道高后果区定量风险分析 SAFETI

A study of soil dispersivity in Qian'an, western Jilin Province of China

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Research in Cold and Arid Regions 2015年第5期7卷 579-586页

作者： xudong zhang Qing Wang TianWen Yu ShuoChao Bao Gang Wang Xin Zhou CenCen Niu College of Construction Engineering Jilin University

Saline soil is vulnerable to water erosion because of its dispersivity. This characteristic has a great influence on dam and slope engineering. There is a large area of saline soil in western Jilin Province, the seasonal frost zone, and this soil is highly dispersive. We studied the properties of soil samples collected from vertical holes near Qian＇an Dabusu Lake, as- sessing the particle size distribution and the chemical components. We also comprehensively identified the level of soil dispersivity by three standard methods, the pinhole test, the crumb test, and the double-hydrometer test. The soil compo- sition and basic physicochemical properties are proved to be the most important factors which determine the dispersion degree of the saline soil. Our results showed that, within depth ranges from 0 to 1 m, silt particles highly influenced the soil dispersivity, and the total soluble salt accounted for ≥0.3%. At the first sampling point, in a tall soil column, the dispersion degree decreased with increasing depth, but this was not as obvious at the second sampling point, which was in a flat area. Nevertheless, the superficial soils of these two sampling sites were strongly dispersive, which must be taken into consid- eration for soil engineering in this region.

关键词： particle-size analysis chemical properties dispersivity dispersion

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CCG25压密注浆桩钻机的研制及应用

水利建设与管理 2024年第3期44卷 81-84页

作者：田新红张旭东湖南宏禹工程集团有限公司湖南长沙410007

现有压密注浆需要用到钻机、拔管机等多种设备,注浆时人工用量多、移动速度慢,需经常拆卸管,施工步骤多。为解决这些问题,研发了CCG25压密注浆桩钻机。该机采用电液驱动、集中控制,实现了钻孔与连续拔管灌浆一体化,具备自动拆卸钻杆和... 详细信息

现有压密注浆需要用到钻机、拔管机等多种设备,注浆时人工用量多、移动速度慢,需经常拆卸管,施工步骤多。为解决这些问题,研发了CCG25压密注浆桩钻机。该机采用电液驱动、集中控制,实现了钻孔与连续拔管灌浆一体化,具备自动拆卸钻杆和行走功能,能够提高施工时工人安全性并降低劳动强度。此外,研发了钻机配套用直径为90mm的新型钻杆和大孔径的钻头,满足了钻孔、压密灌浆一体化施工要求。工地试验表明,钻机钻进、拔钻及灌浆速度和效率较高,劳动强度较低,机器操作和转移方便,完全满足工程需求,对钻孔压密注浆桩施工起到了积极的作用。

关键词：压密注浆桩钻机钻孔与连续拔管灌浆一体化自动拆卸钻杆