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Tracking multiple people under occlusion and across cameras using probabilistic models

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第7期10卷 985-996页

作者： xuan-he wang Ji-lin LIU Institute of Information and Communication Engineering Zhejiang University Hangzhou 310027 China Zhejiang Provincial Key Laboratory of lnformation Network Technology Hangzhou 310027 China

Tracking multiple people under occlusion and across cameras is a challenging question for discussion. Furthermore, the cameras in this study are used to extend the field of view, which are distinguished from the same field of view. Such corre- spondence between multiple cameras is a burgeoning research subject in the area of computer vision. This paper effectively solves the problems of tracking multiple people who pass from one camera to another and segmenting people under occlusion using probabilistic models. The probabilistic models are composed of blob model, motion model and color model, which make the most of the space, motion and color information. First, we present a color model that uses maximum likelihood estimation based on non-parametric kernel density estimation. Second, we introduce a blob model based on mean shift, which segments the body into many regions according to the color of each person in order to spatially localize the color features corresponding to the way people are dressed. Clothes can be any mixture of colors. Third, we bring forward a motion model based on statistical probability which indicates the movement position of the same person between two successive frames in a single camera. Finally, we effectively unify the three models into a general probabilistic model and attain a maximization likelihood probability image, which is used to segment the foreground region under occlusion and to match people across multiple cameras.

关键词： Color model Motion model Blob model People occlusion People tracking Kernel density estimation

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Wafer‑Scale Vertical 1D GaN Nanorods/2D MoS_(2)/PEDOT:PSS for Piezophototronic Effect‑Enhanced Self‑Powered Flexible Photodetectors

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Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin Tang Hongsheng Jiang Zhengliang Lin xuan wang Wenliang wang Guoqiang Li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

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基于动态污点跟踪的敏感文件泄露检测方法

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华中科技大学学报（自然科学版） 2016年第11期44卷 39-42,81页

作者：李伟明贺玄王永剑华中科技大学计算机科学与技术学院湖北武汉430074 公安部第三研究所信息网络安全公安部重点实验室上海201204

为了解决网络应用程序引起的服务器敏感信息泄露问题,提出了基于动态污点跟踪的敏感文件泄露检测方法.该方法先标记敏感文件的读写缓冲区为污点源,然后实时跟踪文件缓冲区的处理流程,监测污染源是否传播到其他内存位置,或者写入其他文件... 详细信息

为了解决网络应用程序引起的服务器敏感信息泄露问题,提出了基于动态污点跟踪的敏感文件泄露检测方法.该方法先标记敏感文件的读写缓冲区为污点源,然后实时跟踪文件缓冲区的处理流程,监测污染源是否传播到其他内存位置,或者写入其他文件.最后检测发送缓冲区是否包含污点数据,以确定是否发生敏感文件的泄露.实验结果表明:提出的方法不仅能够监控用户指定的敏感文件,还能防止应用程序将敏感信息写入其他文件或者发送到网络上.

关键词：动态污点跟踪敏感信息泄露文件泄露敏感文件目录遍历漏洞

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Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry

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Journal of Energy Chemistry 2025年第1期100卷 192-200页

作者： Hua Gao Yunfeng Zhang Menglei wang Ruoxuan Yang Shuai Feng xuan Cao Yaping Zhang Zhongyuan Lu Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology School of Material Science and Engineering Henan University of Technology College of Chemistry and Chemical Engineering Taishan University

Lithium-sulfur （Li-S） batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy ***,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of Li-S *** rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be ***,a universal synthetic strategy to construct a series of three-dimensional （3D） porous graphene-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating the Li-S redox *** has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical *** Li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,the soft-packaged Li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g-1and guarantees for the continuous 30 min work of fan *** investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable Li-S batteries.

关键词： Redox reactions

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经济发展新常态与供给侧结构性改革——国内相关研究进展与评述

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改革与战略 2017年第9期33卷 33-39页

作者：张开聂倩贺璇王声啸中共中央党校经济学部北京100091 中共中央党校研究生院北京100091

文章梳理了以习近平同志为核心的党中央对经济发展新常态和供给侧结构性改革的理论判断和政策主张,对国内基于马克思主义政治经济学和西方经济学理论框架有代表性的观点进行了综述、对比和评价。在经济发展新常态背景下,中国所进行的供... 详细信息

文章梳理了以习近平同志为核心的党中央对经济发展新常态和供给侧结构性改革的理论判断和政策主张,对国内基于马克思主义政治经济学和西方经济学理论框架有代表性的观点进行了综述、对比和评价。在经济发展新常态背景下,中国所进行的供给侧结构性改革必须以马克思主义政治经济学为指导,坚持中国特色社会主义政治经济学才是供给侧结构性改革的理论基础。

关键词：经济发展新常态供给侧结构性改革马克思主义政治经济学西方经济学评述

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Neuroprotective effects of Triptolide(T10) on Parkinsonian model and the related mechanisms

Neuroprotective effects of Triptolide(T10) on Parkinsonian m...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Yi-Zheng wang,Hong wang,Jia-Hui DENG,Yi he,xuan wang,Xiao-Min wang~* Department of neurobiology and Key Laboratory of the Neurodegenerative Disorders of the Chinese Ministry of Education,Capital Medical University,Youanmen,Beijing 100069,China

Parkinson’s disease(PD) is a progressive neurodegenerative disorder characterized by the degeneration of dopaminergic(DAergic) neurons located in substantia nigra pars compacta(SNpc).It has been demonstrated that the inflammation in the central nervous system(CNS) is closely associated with the pathogenesis of *** hallmark of the brain inflammation is the activation of *** activation,microglia can produce a variety of cytotoxic mediators,including nitric oxide(NO),proinflammatory cytokines,excitatory amino acid,reactive oxygen intermediates,and arachidonic acid and ***,research has indicated that the phagocyte oxidase (PHOX) activation may contribute to the lipopolysaccharide(LPS)-induced reactive oxygen species(ROS) increase, which was produced much earlier than the release of those above *** previous study has elucidated that a monomer from the Chinese traditial herb-triptolide(T)’s neuroprotective effect may be related to its inhibiting the inflammatory ***,the present study was conducted to investigate that whether T could effect on the PHOX,and to explore the translocation of the subunits of PHOX,p47 and p67,from cytosol to membrane. An inflammatory PD mouse model was established by injecting LPS into the substantia nigra,which induced the loss of DAergic neurons in substantia nigra,and decreased the time of rota-rod *** data indicated that T reduced the inflammation-mediated the death of DAergic *** order to clarify that whether T protected DAergic neurons through inhibiting the over-activation of microglia by regulate the activity of PHOX, studies on the molecular mechanisms were explored on the BV-2 cell line(a murine microglia cell line).The results showed that high dose(30 nM) of T decreased the expression of p47 in cytoplasm,while no matter a low dose (3 nM),a medium dose(10 nM) or a high dose(30 nM) inhibited p47 translocation from cytosol to membrane, suggesting that T

关键词： Parkinson’s disease T10 phagocyte oxidase

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Resolving the developmental mechanisms of cardiac microthrombosis of SARS-CoV-2 based on single-cell transcriptome analysis

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Science China Life Sciences 2025年第1期 103-115页

作者： Xizi Luo Nan Zhang Yuntao Liu Beibei Du xuan wang Tianxu Zhao Bingqiang Liu Shishun Zhao Jiazhang Qiu Guoqing wang State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Basic MedicineJilin University State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Veterinary MedicineJilin University College of Mathematics Jilin University Bioinformatic Lab School of MathematicsShandong University Department of Cardiology China-Japan Union HospitalJilin University

The coronavirus disease 2019（COVID-19） outbreak caused by the severe acute respiratory syndrome coronavirus-2（SARS-CoV-2） developed into a global health emergency. Systemic microthrombus caused by SARS-CoV-2 infection is a common complication in patients with COVID-19. Cardiac microthrombosis as a complication of SARS-CoV-2 infection is the primary cause of cardiac injury and death in patietns with severe COVID-19. In this study, we performed single-cell sequencing analysis of the right ventricular free wall tissue from healthy donors,patients who died during the hypercoagulable period of characteristic coagulation abnormality（CAC）, and patients who died during the fibrinolytic period of CAC. We collected 61,187 cells enriched in 24 immune cell subsets and 13 cardiac-resident cell subsets. We found that in the course of SARS-CoV-2 infected heart microthrombus, MYO1EhighRASGEF1Bhighmonocyte-derived macrophages promoted hyperactivation of the immune system and initiated the extrinsic coagulation pathway by activating chemokines CCL3, CCL5. This series of events is the main cause of cardiac microthrombi following SARS-CoV-2 infection. In a SARS-CoV-2 infected heart microthrombus, excessive immune activation is accompanied by an increase in cellular iron content, which in turn promotes oxidative stress and intensifies intercellular competition. This induces cells to alter their metabolic environment, resulting in increased sugar uptake via the glycosaminoglycan synthesis pathway. In addition, high levels of reactive oxygen species generated by elevated iron levels promote increased endogenous malondialdehyde synthesis in a subpopulation of cardiac endothelial cells. This exacerbates endothelial cell dysfunction and exacerbates the coagulopathy process.

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基于辐射原理狭窄垂直封闭空腔热阻强化措施的实验研究

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辐射研究与辐射工艺学报 2017年第2期35卷 56-64页

作者：李思思周文和何炫王良璧兰州交通大学环境与市政工程学院兰州730070 兰州交通大学铁道车辆热工教育部重点实验室兰州730070

列车车体围护结构中普遍存在的狭窄空腔增加了车体围护结构的热阻,同时也为进一步降低空腔的辐射换热份额创造了条件。通过实验方法,利用粘贴铝箔方式改变空腔内壁面辐射特性,以期改善空腔热工性能效果进行了研究。结果发现:常规车体壁... 详细信息

列车车体围护结构中普遍存在的狭窄空腔增加了车体围护结构的热阻,同时也为进一步降低空腔的辐射换热份额创造了条件。通过实验方法,利用粘贴铝箔方式改变空腔内壁面辐射特性,以期改善空腔热工性能效果进行了研究。结果发现:常规车体壁面空腔辐射换热份额很大,不容忽视;在空腔内壁面附着铝箔等高反射率表层,可有效降低空腔的辐射换热份额,且随着空腔厚度的增大,空腔当量导热系数降低的效果更为明显,最大可达无铝箔空腔的62%左右;冷面单面粘贴铝箔方式的效果与热面单面粘贴铝箔方式的效果几乎相同,双面粘贴铝箔方式效果最好,优于单面铝箔方式5%左右。

关键词：狭窄空腔辐射换热强化空腔热阻当量导热系数

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