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Exploring Frontier Technologies in Video-Based Person Re-Identification: A Survey on Deep Learning Approach

Computers, Materials and Continua 2024年第1期81卷 25-51页

作者： Wang, Jiahe Gao, Xizhan zhu, fa Chen, Xingchi Shandong Provincial Key Laboratory of Ubiquitous Intelligent Computing School of Information Science and Engineering University of Jinan Jinan 250022 China College of Information Science and Technology College of Artificial Intelligence Nanjing Forestry University Nanjing 210037 China Department of Mathematics and Theories Peng Cheng Laboratory Shenzhen 518066 China

Video-based person re-identification (Re-ID), a subset of retrieval tasks, faces challenges like uncoordinated sample capturing, viewpoint variations, occlusions, cluttered backgrounds, and sequence uncertainties. Recent advancements in deep learning have significantly improved video-based person Re-ID, laying a solid foundation for further progress in the field. In order to enrich researchers’ insights into the latest research findings and prospective developments, we offer an extensive overview and meticulous analysis of contemporary video-based person ReID methodologies, with a specific emphasis on network architecture design and loss function design. Firstly, we introduce methods based on network architecture design and loss function design from multiple perspectives, and analyzes the advantages and disadvantages of these methods. Furthermore, we provide a synthesis of prevalent datasets and key evaluation metrics utilized within this field to assist researchers in assessing methodological efficacy and establishing benchmarks for performance evaluation. Lastly, through a critical evaluation of the experimental outcomes derived from various methodologies across four prominent public datasets, we identify promising research avenues and offer valuable insights to steer future exploration and innovation in this vibrant and evolving field of video-based person Re-ID. This comprehensive analysis aims to equip researchers with the necessary knowledge and strategic foresight to navigate the complexities of video-based person Re-ID, fostering continued progress and breakthroughs in this challenging yet promising research domain. © 2024 The Authors. Published by Tech Science Press.

关键词： Video-based person Re-ID deep learning survey of video Re-ID loss function

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Regulated reaction pathway of CO_(2)photoreduction into CH_(4)by metal atom pair sites

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Rare Metals 2024年第9期43卷 4620-4627页

作者： Dong-Po He Guang-Bing Huang Jun Hu Yang Wu Xiao-Dong Li Qing-Xia Chen Shan zhu Wen-Sheng Yan Jun-fa zhu Yang Pan Xing-Chen Jiao Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China Hefei National Research Center for Physical Sciences at Microscale National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Max Planck Institute of Microstructure Physics Weinberg 206120 HalleGermany State Grid Anhui Electric Power Research Institute Hefei 230601China

The carbon dioxide(CO_(2))reduction process involves complex protonation,making the resulting product often *** achieve the desired product,it is crucial to manipulate the reaction ***,we build the metal atom pair sites for selective CO_(2)photoreduction into *** a prototype,Ni atom pair sites loaded on the Mo S_(2)nanosheets were synthesized and verified by highresolution transmission electron microscopy(HRTEM),X-ray photoelectron spectroscopy(XPS)and X-rayabsorption near edge structure spectra(XANES).In-situ Fourier transform infrared spectroscopy(FTIR)monitors the*CHO group,a crucial intermediate in CH_(4)production,during CO_(2)photoreduction on the Ni-Mo S_(2)nanosheets,whereas this monitoring is not observed for the Mo S_(2)***,theoretical calculations disclose that over the Ni-Mo S_(2)nanosheet slab,the formation energy of*CHO intermediates is determined to be lower(0.585 e V)than the desorption energy of*CO intermediates for CO production(0.64 e V),implying the higher selectivity of CH_(4)production.

关键词： steps dioxide desired

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双叶片液压关节主被动联合柔顺控制分析

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吉林大学学报（工学版） 2024年第1期54卷 86-98页

作者：赵慧朱发强蒋林王诗虎武汉科技大学冶金装备及其控制教育部重点实验室武汉430081 武汉科技大学机器人与智能系统研究院武汉430081

双叶片液压被动柔顺回转关节在受到外界环境的碰撞时,关节的被动柔顺性会使关节阀体输出转角产生回调,碰撞结束后,输出转角又会迅速恢复。为了有效吸收剩余的冲击能量,本文将自适应阻抗控制作为回转关节的主动柔顺控制,与关节的被动柔... 详细信息

双叶片液压被动柔顺回转关节在受到外界环境的碰撞时,关节的被动柔顺性会使关节阀体输出转角产生回调,碰撞结束后,输出转角又会迅速恢复。为了有效吸收剩余的冲击能量,本文将自适应阻抗控制作为回转关节的主动柔顺控制,与关节的被动柔顺控制相结合,实现对关节的主被动联合柔顺控制,增大了回转关节在受到碰撞时的回调角度,能够更好地化解环境碰撞力。同时在关节的控制系统中设计并添加了一个模糊自适应PID(比例-积分-微分)控制器,作为自适应阻抗控制中的位置控制器,能够减小回转关节输出转角恢复后的稳态误差,提高了关节与外界接触时的安全性。

关键词：机械电子工程液压关节模糊PID控制自适应阻抗控制主被动联合柔顺控制

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A review of vortex pinning in REBa_(2)Cu_(3)O_(7-x) coated conductors

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cMat 2024年第1期1卷 110-125页

作者： Tong-Xin Wang Da-Xing Huang fa-zhu Ding Hao Dong Hao Yu Chao-Chao Dun Hong-Wei Gu Key Laboratory of Applied Superconductivity and Institute of Electrical Engineering Chinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina The Molecular Foundry Lawrence Berkeley National Laboratory BerkeleyBerkeleyCaliforniaUSA

REBa_(2)Cu_(3)O_(7-x)exhibits outstanding qualities such as a high irreversible field(7 T)and strong current-carrying capacity(77 K,10^(6) A cm^(-2)),making it ideal for high magnetic field applications such as fusion,accelerators,and nuclear magnetic ***,the degradation of in-field critical current density(Jc)due to vortex motion is a significant *** indicates that improving vortex pinning can notably enhance Jc in REBCO,showing promise for its future high-field *** review explores vortex pinning mecha-nisms,artificial pinning centers(APCs),and how environmental conditions affect pinning characteristics,highlighting advancements in vortex pinning for REBCO in magnetic *** methods for introducing APCs are discussed and compared for evaluating their efficacy in achieving optimal nanoparticle distri-butions and consequent superconducting performance improvements,under-scoring the importance of nano-defect features(type,size,and distribution)in optimizing the superconducting properties of the ***,the re-view tackles current challenges,shares recent research breakthroughs,and out-lines future research directions for designing pinning landscapes to further improve REBCO performance.

关键词： critical current density magnetic field REBCO vortex pinning

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融合环形统计矢量的复合材料褶皱缺陷超声相位迁移成像

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物理学报 2024年第17期73卷 205-215页

作者：刘淑倩张海燕张辉朱文发陈祎婷刘雅洁上海大学通信与信息工程学院上海200444 上海工程技术大学城市轨道交通学院上海201620

超声波的相位变化携带着组织结构的重要信息,通过相位加权可提高超声图像的清晰度.针对褶皱散射回波微弱、受噪声影响大、时域修正成像耗时长等问题,提出一种基于相位虚部相干因子的频域相干成像方法.首先提取波场信号中的相位信息,然... 详细信息

超声波的相位变化携带着组织结构的重要信息,通过相位加权可提高超声图像的清晰度.针对褶皱散射回波微弱、受噪声影响大、时域修正成像耗时长等问题,提出一种基于相位虚部相干因子的频域相干成像方法.首先提取波场信号中的相位信息,然后采用环形统计获取相位虚部矩阵,通过相位虚部矩阵与相位迁移成像(phase shift migration,PSM)中的原频域矩阵相乘构建相位虚部相干因子(phase imaginary coherence factor,PICF),将相位虚部相干因子引入相位迁移成像,并对各层迁移波场进行修正,通过频域信号相乘恢复纤维纹理信息.对厚度为18 mm的碳玻纤维复合材料板进行检测,实验结果表明:未加权的相位迁移成像在10 mm深度以后的纤维铺层信息丢失,无法检测出深层区域的缺陷;用PICF加权后PSM成像可检测出位于11,15,16 mm处的3个纤维褶皱,褶皱缺陷成像清晰度和纹理细致度均得到提高,褶皱角度的检测误差约为10%,并且成像耗时仅为1.5 s,运算效率比时域全聚焦成像(total focusing method,TFM)至少提高8.67倍.

关键词：环形统计矢量相位迁移成像褶皱复合材料

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Controllable synthesis and tunable photocatalytic activity of TiO2 nanowires via alcohol-thermal method

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Rare Metals 2019年第5期38卷 390-396页

作者： Zheng-Xia Xu An-Qi Wang Yong-fa zhu School of Civil Engineering and Mechanics Yanshan UniversityQinhuangdao 066004China Department of Chemistry Tsinghua UniversityBeijing 100084China

Titania nanowires(TiO2-NW)with tunable aspect ratios and morphologies were directly synthesized using a simple alcohol-thermal ***,ethanol and acetic acid were used as solvents and lithium ion was used as the capping agent to promote the conversion of titanium butoxide into *** morphologies and crystal phases of TiO2-NW were determined by the molar ratio of solvents and the content(mol%)of lithium *** band gap of TiO2-NW with pure anatase phase is slightly bigger than that of TiO2-NW with a mixture of anatase and rutile *** TiO2-NW could achieve effective decolorization of methyl blue(the decolorization rate is over 95%)after 35-min ultraviolet(UV)irradiation.

关键词： Nanowires TiO2 Photocatalysis Degradation Photocurrent

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基于制剂原料及中间体理化性质的中药凝胶贴膏成型规律研究

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中国中药杂志 2024年第3期49卷 634-643页

作者：杨光朱森发田文秀李文杰鲜洁晨洪燕龙上海中医药大学上海中医健康服务协同创新中心上海201203 南昌市洪都中医院上海201203 上海中医药大学创新中药研究院上海201203 中药现代制剂技术教育部工程研究中心江西南昌330006

以中药饮片细粉为制剂原料,研究制剂原料及中间体理化性质与中药凝胶贴膏成型质量之间的相关性及其成型规律。选取48种中药复方为模型处方制备凝胶贴膏,使用旋转流变仪分别测定各处方膏体的储能模量(G′)、损耗模量(G″)、屈服应力(τ)... 详细信息

以中药饮片细粉为制剂原料,研究制剂原料及中间体理化性质与中药凝胶贴膏成型质量之间的相关性及其成型规律。选取48种中药复方为模型处方制备凝胶贴膏,使用旋转流变仪分别测定各处方膏体的储能模量(G′)、损耗模量(G″)、屈服应力(τ)、蠕变柔量[J(t)]等流变学参数。通过主观评分和客观评分对制备的中药凝胶贴膏进行质量评价,对各处方膏体的特征物理性质进行聚类、主成分等统计分析。以膏体的流变学性质对贴膏成型质量进行预测,贴膏7 d后成型质量预测准确率为83.72%,对30 d后的贴膏成型质量预测准确率达88.37%。当膏体G′、G″等参数较大且J(t)较小时,贴膏成型质量较好;当膏体的涂布点≥3时,膏体涂布困难。此外,当处方中含金属离子中药占比较高时,主要影响贴膏30 d成型质量,黏性较低。当处方中含酸性化学成分占比较高时,主要影响贴膏7 d成型质量,残留较多。研究结果提示基于膏体的流变学性质,可预测中药饮片细粉凝胶贴膏的成型质量,为中药凝胶贴膏的处方开发提供参考。

关键词：凝胶贴膏特征物理性质成型质量旋转流变仪

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Editorial for rare metals, special issue on photocatalysis

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Rare Metals 2019年第5期38卷 359-360页

作者： Tie-Rui Zhang Gang Liu Yong-fa zhu Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Chemistry Tsinghua UniversityBeijing 100084China

Burning of fuels is an irreversible entropy increasing process,requiring additional energies derived from the environment to let the process *** theory,photon energy delivered from the sun could fix the huge energy demand in a clean and sustainable *** is such an ideal approach to reconvert inert molecules directly into fuels and other chemical feedstocks using photon energy without any other energy inputs.

关键词： irreversible entropy Editorial photocatalysis

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Dielectric Properties of Porous Reaction-boned Si_3N_4 Ceramics with Controlled Porosity and Pore Size

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Journal of Materials Science & Technology 2008年第2期24卷 207-210页

作者： Jie XU Dongmei zhu fa LUO Wancheng ZHOU Peng LI State KeyLaboratory of Solidification Processing Northwestern Polytechnical University Xi＇an 710072 China

This paper presents the microwave dielectric properties of reaction bonded porous silicon nitride ceramics with variant porosity and pore size, which were prepared by adding pore-forming agent grains into the silicon powders. The experimental results show that the dielectric constant and the dielectric loss of the samples reduce evidently with increasing porosity in the sample. When the porosity is constant, the dielectric constant and the dielectric loss of the ceramics decrease visibly as the pore size increases. Among all the obtained samples, the minimum dielectric constant is about 2.4.

关键词： Porous silicon nitride ceramics Reaction bonded Dielectric properties Radome

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Preparation and characteristic of NASICON ceramics

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Rare Metals 2006年第z1期25卷 39-42页

作者： zhu Dongmei LUO fa XIE Zhanglong ZHOU Wancheng State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''an 710072 China

Hot-pressed sintering was employed to prepare the sodium super ionic conductor (Na1+xZr2SixP3-xO12, 1.8≤x≤2.2) ceramics and compare with the sample obtained from normal-press sintering. The phase formation, density, and conductivity of the hot-press sintered and the normal-press sintered samples were investigated in detail. Results show that the density of NASICON ceramics and the degree of crystallization can be improved by hot-press process efficiently. The density of the sample sintered by normal sintering is obviously lower than that sintered by hot press. XRD analysis indicates all the hot press sintered samples contain mainly monoclinic NASICON and no ZrO2 phase was found. The ionic conductivity of normal-press sintered sample is much lower than that of hot-press sintered sample. When the composition is close to Na3Zr2Si2PO12, the dc conductivities of the hot press sintered samples were in the order of 10-3 S·cm-1. The variation of the ac conductivity with frequency in the high frequency region agrees with the power law feature of σ(ω)∝ωn(0

关键词： NASICON normal sintering hot pressed sintering electronic conductivity

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