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一种自监督掩码图像建模的遮挡目标检测方法

重庆理工大学学报（自然科学） 2024年第6期38卷 186-193页

作者：冯欣胡成杭重庆理工大学计算机科学与工程学院重庆400054

为提升目标检测网络在更多遮挡场景下的适应性和检测效果,提出了一种自监督掩码图像建模方法,该方法将训练分为2个阶段:预训练阶段和微调阶段。在预训练阶段,采用局部掩码和重建的代理任务对无标签图像进行训练。在微调阶段,针对被遮挡... 详细信息

为提升目标检测网络在更多遮挡场景下的适应性和检测效果,提出了一种自监督掩码图像建模方法,该方法将训练分为2个阶段:预训练阶段和微调阶段。在预训练阶段,采用局部掩码和重建的代理任务对无标签图像进行训练。在微调阶段,针对被遮挡目标尺度变化和不同大小目标的检测问题,提出了基于视觉Transformer(vision transformer,ViT)的金字塔结构。通过在Crowdhuman和CityPersons数据集上进行对比分析,自监督掩码图像建模方法在检测被遮挡目标方面优于其他方法。

关键词：目标检测自监督局部掩码图像建模视觉Transformer

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速度美学视域下的网络电影倍速播放研究

电影评介 2024年第5期 40-45页

作者：胡斌慧蔡伟南京艺术学院电影电视学院南京艺术学院戏剧与影视创研中心

“电影,这一20世纪的文化形式,在计算机用户的工具箱里找到了新的生命……电影的美学策略己经成为计算机软件的基本组织原则。进入电影叙事的虚构世界的窗口已经成为进入数据场景(datascape)的窗口。简而言之,曾经作为电影的东西如今成... 详细信息

“电影,这一20世纪的文化形式,在计算机用户的工具箱里找到了新的生命……电影的美学策略己经成为计算机软件的基本组织原则。进入电影叙事的虚构世界的窗口已经成为进入数据场景(datascape)的窗口。简而言之,曾经作为电影的东西如今成为了人与计算机的界面。”[1]电影与计算机技术的融合不仅仅是技术层面的结合,更是文化与技术之间的互动。在这个过程中,电影的叙事方式和美学原则被重新解读和应用,与现代技术和信息传输方式相结合,为人们提供了全新的观影体验和文化解读。

关键词：计算机软件计算机技术信息传输方式倍速网络电影美学策略美学原则虚构世界

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Multi-Panel Extra-Large Scale MIMO Based Joint Activity Detection and Channel Estimation for Near-Field Massive IoT Access

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China Communications 2023年第5期20卷 232-243页

作者： Zhen Gao Hanlin Xiu Yikun mei Anwen Liao Malong Ke Chun hu Mohamed-Slim Alouini School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China MIIT Key Laboratory of Complex-Field Intelligent Sensing Beijing Institute of TechnologyBeijing 100081China The Advanced Technology Research Institute of Beijing Institute of Technology Jinan 250307China Yangtze Delta Region Academy of Beijing Institute of Technology(Jiaxing) Jiaxing 314019China Electrical Engineering Program Division of Physical Sciences and EngineeringKing Abdullah University of Science and TechnologyThuwal 23955Saudi Arabia

The extra-large scale multiple-input multiple-output(XL-MIMO)for the beyond fifth/sixth generation mobile communications is a promising technology to provide Tbps data transmission and stable access ***,the extremely large antenna array aperture arouses the channel near-field effect,resulting in the deteriorated data rate and other challenges in the practice communication ***,multi-panel MIMO technology has attracted extensive attention due to its flexible configuration,low hardware cost,and wider *** combining the XL-MIMO and multi-panel array structure,we construct multi-panel XL-MIMO and apply it to massive Internet of Things(IoT)***,we model the multi-panel XL-MIMO-based near-field channels for massive IoT access scenarios,where the electromagnetic waves corresponding to different panels have different angles of arrival/departure(AoAs/AoDs).Then,by exploiting the sparsity of the near-field massive IoT access channels,we formulate a compressed sensing based joint active user detection(AUD)and channel estimation(CE)problem which is solved by AMP-EM-MMV *** simulation results exhibit the superiority of the AMP-EM-MMV based joint AUD and CE scheme over the baseline algorithms.

关键词： extra-large scale MIMO massive IoT access active user detection channel estimation multipanel approximate message passing

Phase separation and crystallization of La2O3 doped ZnO-B2O3-SiO2 glass

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Journal of Rare Earths 2019年第7期37卷 767-772页

作者： Mitang Wang Long Fang mei Li Zhaogang Liu Yanhong hu Xiaowei Zhang Wei Deng Ruhil Dongol School of Materials and Metallurgy Inner Mongolia University of Science&TechnologyBaotou 014010China Key Laboratory of Green Extraction&Efficient Utilization of Light Rare-Earth Resources Ministry of EducationBaotou 014010China Materials and Engineering Research Institute Sheffield Hallam University City CampusSheffield S1 1WBUK New York State College of Ceramics Alfred UniversityAlfredNY14802USA

In order to investigate the effect of the La2O3 on the phase separation and crystallization of ZnO-B2O3-SiO2 glass, after the occurence of the phase separation and crystallization of glasses by heat treatment, the microstructure morphology and distribution of elements in different sample areas were characterized by the scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS);the non-isothermal crystallization kinetics of the glass samples was studied by using a differential scanning calorimeter(DSC) and the precipitated crystals of crystallized glass were determined by the X-ray diffraction(XRD). The results suggest that the phase separation and crystallization of 60ZnO-30 B2O3-10SiO2 glass occur at glass surface, and the incorporation of small amount(<4 mol%) of La2O3 significantly inhibits the glass phase separation and consequently improves the thermal stability of *** of La2O3 accelerates the glass crystallization at the elevated temperature(660 ℃), making the depth of crystal layer thicker and diffraction intensity in XRD patterns stronger. However, due to the precipitation of several crystals that occur simultaneously when La2O3 doping amount is 4 mol%, crystallization of the 60ZnO-30B2O3-10SiO2 glass is obviously depressed, the crystallization activation energy Ec and the relative crystallinity Xc of the glass reach the maximum and the minimum values, *** transition from one-dimensional growth of crystals to two-dimensional growth of crystals results from La2O3 addition, the one-dimensional growth of crystals remains dominant in crystallization process. This work can provide some useful information for preparing glass ceramics with nano-crystals precipitated in the glass surface.

关键词： Zinc borosilicate glass La2O3 Phase separation Crystallization Rare earths

环塔里木经济带生态系统服务价值的时空演变及空间分异机制

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湖北农业科学 2024年第6期63卷 35-43,52页

作者：王梦杰胡江玲张赛赛新疆师范大学地理科学与旅游学院乌鲁木齐830054

基于环塔里木经济带1990年、2005年和2020年3期土地利用数据,分析土地利用变化特征、生态系统服务价值(ESV)时空变化,并在地理探测器工具的支撑下探究环塔里木经济带ESV的空间分异机制。结果表明,1990—2020年,研究区草地、水域和林地... 详细信息

基于环塔里木经济带1990年、2005年和2020年3期土地利用数据,分析土地利用变化特征、生态系统服务价值(ESV)时空变化,并在地理探测器工具的支撑下探究环塔里木经济带ESV的空间分异机制。结果表明,1990—2020年,研究区草地、水域和林地面积均减少,建设用地、耕地和未利用地面积均增加;从外围山地向中部盆地,ESV存在明显的波动式递减现象;ESV冷热点呈“外部呈环状热点散布、内部呈片状冷点聚集”的空间分布格局;环塔里木经济带ESV空间分异的主要驱动因素是未利用地占比、气象因子和高程,各因素间交互作用表现为增强关系,自然因素的解释力高于社会经济因素。

关键词：土地利用变化生态系统服务价值热点分析地理探测器环塔里木经济带

Relating atomic local structures and Curie temperature of NdFeB permanent magnets:an X-ray absorption spectroscopic study

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Rare Metals 2018年第11期37卷 983-988页

作者： Mu-Nan Yang Hang Wang Yong-Feng hu Liu-Yi-mei Yang Aimee Maclennan Bin Yang Institute of Engineering Research Jiangxi University of Scienceand Technology Canadian Light Source University of Saskatchewan

Relationship between atomic local structures and Curie temperature of NdFeB permanent magnets was investigated semi-quantitatively using synchrotron radiation technique. Fe K-edge X-ray absorption spectroscopy(XAS) was employed to study the local structure of Fe atoms for samples before and after doping Dy, Tb or Gd. It is found that the bond lengths and coordination numbers are changed. Thus, the exchange interaction between Fe atoms increases with Dy, Tb or Gd doping, resulting in the improvement of Curie temperature of NdFeB permanent magnets. The doping effect is proven by experimental measurement of the magnetic properties. Microstructural characterization using scanning electron microscopy(SEM) was also used to further analyze the effect of different rare earth elements doping on Curie temperature of NdFeB permanent magnets.

关键词： Permanent magnet Synchrotron radiation X-ray absorption fine structure Crystal structure Curie temperature

Eosinophil extracellular traps in respiratory ailment:Pathogenic mechanisms and clinical translation

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第3期10卷 213-224页

作者： Shun-Yu Wu Bo-Yu Cai Tian-Yu Wang Zhi-Wen Cao hu Peng huan-Hai Liu Department of Otolaryngology The Second Affiliated Hospital of the Naval Military Medical University(Shanghai Changzheng Hospital)ShanghaiChina

Background:Eosinophilic extracellular traps(EETs)are reticular complexes comprising deoxyribonucleic-Acid(DNA)fibers and granule ***:EETs play a crucial role in antimicrobial host responses and are pathogenic when overproduced or under *** created by eosinophils appear to enable vital immune responses against extra-cellular pathogens,nevertheless,trap overproduction is evident in ***&Methods:As considerably research is performed,new data affirmed that EETs can alter the outcome of respiratory ***:We probe into the disclosure and specificity of EETs produced in reaction to various stimuli and propose a role for those frameworks in ailment pathogenesis and the establishment of chronic,unresolved ***:Whether EETs can be used as a prospective brand-new target for the diagnosis,treatment and prognosis of respiratory ailments is a scientific theme worth ***:We probe into the disclosure and specificity of EETs produced in reaction to various stimuli and propose a role for those frameworks in ailment pathogenesis and the establishment of chronic,unresolved inflammation.

关键词： cytolysis degranulation eosinophil extracellular traps eosinophils respiratory ailments

Influence of the roots of mixed-planting species on the shear strength of saline loess soil

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Journal of Mountain Science 2021年第3期18卷 806-818页

作者： LIU Ya-bin hu Xia-song YU Dong-mei Zhu Hai-li LI Guo-rong Department of Geological Engineering Qinghai UniversityXining 810016China Qinghai Institute of Salt Lakes Chinese Academy of ScienceXining 810008China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Geology and Environment of Salt LakesXining 810008China

In order to improve our knowledge of the mechanical effect of the roots of mixed-plantings on soil reinforcement and slope protection,the influence of roots of a mixed-planting with four herb species(Medicago sativa L.,Elymus nutans Griseb.,Puccinellia distanx(L.),and Poa pratensis L.)and one shrub species(Caragana korshinskii Kom.)were investigated on the shear strength characteristics of saline loess *** root distribution characteristics were assessed via a survey when the plants grew for one *** effects of the root biomass density,the root mass ratio(RMR)of the fine roots to the coarse roots,the moisture content,and the salt content on the shear strength index of the rooted soil were analyzed via a triaxial compression test,and the mechanism of these effects was *** results indicate that the biomass density decreased linearly with increasing *** RMR initially decreased with depth and then increased,exhibiting in a quadratic *** cohesion of the rooted soil increased linearly as the biomass density *** cohesion of the rooted soil initially increased with increasing RMR and salt content,and then it *** turning point of the cohesion occurred when the RMR was 0.6 and the salt content was 1.18%.The internal friction angle of the rooted soil initially increased with biomass density and then decreased,and the turning point of the internal friction angle occurred when the biomass density was 0.015 g/*** relationships between the internal friction angle of the rooted soil and the RMR and salt content were exponential incremental and linear subtractive relationship,*** the cohesion and the internal friction angle of the rooted soil linearly decreased with increasing moisture content.

关键词： Xining Basin Herb species Shrub species Rooted soil Saline loess soil Soil reinforcement Shear strength index

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央行信息披露对通胀预期的非对称效应研究

金融监管研究 2024年第5期 41-60页

作者：胡恒强张洁南京财经大学金融学院南京农业大学金融学院

本文构建了央行分层化信息披露指数,测度了公众通胀预期,并基于MSVAR模型分区制探讨了央行信息披露对通胀预期的非对称效应。研究结果表明:(1)央行信息披露可以有效引导公众通胀预期,且在经济繁荣区制下,央行信息披露对通胀预期的引导... 详细信息

本文构建了央行分层化信息披露指数,测度了公众通胀预期,并基于MSVAR模型分区制探讨了央行信息披露对通胀预期的非对称效应。研究结果表明:(1)央行信息披露可以有效引导公众通胀预期,且在经济繁荣区制下,央行信息披露对通胀预期的引导作用大于经济平稳及经济衰退区制;(2)央行使用描述物价上涨、经济增长加速的措辞频率越高,公众通胀预期就越高,即目标性央行信息披露对通胀预期的影响为正,且这种正向影响在经济衰退区制下更大;(3)央行宽松性货币政策意图越强,公众通胀预期越高,即政策性央行信息披露对通胀预期的影响也为正,且这种正向影响在经济繁荣区制下更大。与目标性央行信息披露相比,政策性央行信息披露对通胀预期的影响较小。本文的结论为央行进一步健全信息披露机制提供了新的思路。

关键词：央行信息披露通胀预期非对称效应 MSVAR