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Vector meson's spin alignments in high energy reactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 5-20页

作者： Jin-Hui Chen Zuo-Tang Liang yu-Gang Ma Xin-Li sheng Qun Wang Key Laboratory of Nuclear Physics and Ion-beam Application (MoE) Institute of Modern PhysicsFudan University Institute of Frontier and Interdisciplinary Science Key Laboratory of Particle Physics and Particle Irradiation (MOE)Shandong University INFN-Firenze Department of Modern Physics University of Science and Technology of China School of Mechanics and Physics Anhui University of Science and Technology

The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider （RHIC） at Brookhaven National Laboratory （BNL）.It provides a unique opportunity to probe the correlation between the polarized quark and antiquark in the strongly coupled quark-gluon plasma （sQGP） produced in relativistic heavy ion collisions,opening a new window to explore the properties of s *** addition,spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e+e-annihilations at high energies where hadron production is dominated by quark fragmentation *** results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization *** comprehensive studies in different hadronization processes are *** this article,we present a brief review of theoretical and experimental advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions,with emphasis on hadronization mechanisms.

关键词： vector meson spin alignment global polarization relativistic heavy ion collisions fragmentation

MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self‑Powered Motion Sensing

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Nano-Micro Letters 2025年第3期17卷 265-279页

作者： yu‑Ze Wang yu‑Chang Wang Ting‑Ting Liu Quan‑Liang Zhao Chen‑Sha Li Mao‑sheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China School of Materials Science and Engineering Peking UniversityBeijing 100871People’s Republic of China School of Mechanical and Material Engineering North China University of TechnologyBeijing 100144People’s Republic of China Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080People’s Republic of China

Polymeric microwave actuators combining tissue-like softness with programmablemicrowave-responsive deformation hold great promise for mobile intelligentdevices and bionic soft robots. However, their application is challenged by restricted electromagneticsensitivity and intricate sensing coupling. In this study, a sensitized polymericmicrowave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx(MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique spacechargepolarization and interfacial polarization, resulting in significant improvements of230% in the dielectric loss factor and 830% in the apparent efficiency of electromagneticenergy harvest. The sensitized microwave actuation demonstrates as the shortenedresponse time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (upto 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combinesdriving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) duringactuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approachfor developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

基于深度学习和复杂空间关系特征的多尺度遥感图像检索

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东北师大学报（自然科学版） 2018年第1期50卷 54-62页

作者：王生生张宇婷吉林大学计算机科学与技术学院吉林长春130012

深度学习技术逐渐成为解决图像检索和图像分类问题的主流技术,然而现有算法不能有效地处理遥感图像中的复杂空间关系以及多尺度特征问题.为有效解决遥感图像检索问题,提出了一种综合考虑空间关系与尺度特征的新方法.首先,用深度学习方... 详细信息

深度学习技术逐渐成为解决图像检索和图像分类问题的主流技术,然而现有算法不能有效地处理遥感图像中的复杂空间关系以及多尺度特征问题.为有效解决遥感图像检索问题,提出了一种综合考虑空间关系与尺度特征的新方法.首先,用深度学习方法检测过的遥感图像抽象为点集;其次,构造Delaunay三角网以描述全局空间关系特征;最后,在空间特征相同的部分中使用模糊性状模型匹配局部空间特征.该模型有效地规避了因尺度不同而产生的视觉差异.在UC Merced Land-Use和RS19等公开数据集上进行实验,结果表明,该算法在多尺度遥感图像检索精度方面的表现优于其他相关方法.

关键词：遥感图像空间关系多尺度模糊形状模型

Single-cell transcriptomic profiling reveals ZEB1-mediated regulation in microglial subtypes and the impact of exercise on neuroinflammatory responses

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Traditional Medicine Research 2025年第2期10卷 55-64页

作者： Jin-Fang Wu Yi-sheng Chen yu-Chun Xie Department of Rehabilitation Medicine Jiangsu Province Geriatric HospitalNanjing 210024China Fujian Key Laboratory of Toxicant and Drug Toxicology Medical CollegeNingde Normal UniversityNingde 352100China Central Laboratory Jiangsu Province Geriatric HospitalNanjing 210024China

Background:This study aims to identify distinct cellular subtypes within brain tissue using single-cell transcriptomic analysis,focusing on specific biomarkers that differentiate cell types and the effects of traditional and exercise ***:Four samples were analyzed:older control(OC),older exercise(OE),younger control(YC),and younger exercise(YE).Single-cell RNA sequencing was used to distinguish cellular subtypes through their biomarker *** visualization included violin and t-SNE plots to illustrate biomarker expression across cell clusters such as oligodendrocytes,microglia,and ***,BV2 cells were exposed to amyloid-beta fragments to simulate Alzheimer’s disease,assessing the impact of exercise-induced cellular ***:Distinct cellular subtypes were identified:oligodendrocytes(MBP,St18),microglia(Dock8),and astrocytes(Aqp4,Gpc5).Sample OE was predominantly oligodendrocytes,while YE had more astrocytes,inhibitory neurons,and Canal-Retzius *** showed a significant presence of Olfm3+ganglion ***1 gene knockout revealed changes in SMAD family gene expression,which regulate *** stress levels were also ***:This profiling enhances our understanding of brain cellular functions and interactions,potentially informing targeted therapies in neurological *** may influence brain cell immune responses and cell death pathways by regulating specific gene expressions,offering new insights for treating neuroinflammation and degeneration.

关键词： single-cell transcriptomics brain tissue cellular subtypes biomarker expression neuronal diversity

Insight into the particle shape on the impact of dry granular flow against a rigid barrier: A DEM study

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Journal of Earth Science 2025年

作者： Rui-Xiao Zhan Dong Su Xiang-sheng Chen yuan-Jun Jiang Guo-Ping Lei Jing-Jing yu Key Laboratory for Resilient Infrastructures of Coastal Cities (MOE)， Shenzhen University College of Civil and Transportation Engineering， Shenzhen University School of Architecture and Urban Planning， Shenzhen University Shenzhen Key Laboratory of Green， Efficient and Intelligent Construction of Underground Metro Station， Shenzhen University Institute of Mountain Hazards and Environment， Chinese Academy of Sciences School of Transportation， Civil Engineering & Architecture， Foshan University

The effect of particle shape on the impact of dry granular flow remains an open area for further investigation. Five distinct particle shapes were examined in this study using discrete element simulations after calibrating the numerical model using a published work. The findings indicated that the particle shape had a significant influence on granular mobility. With negligible variations in normalized kinetic energy between particles of different shapes， the effect of particle shape on the increasing rate of kinetic energy became more obvious. All irregular particle scenarios had longer accumulated particle lengths down the channel than spherical particles. Variations in particle shape led to adjustments in the distribution of impact forces on the barrier. These findings substantially enhance our understanding of the distinctive effects of particle shapes on the impact mechanism of dry granular flow.

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Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang sheng-Jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

羧丙基甲基纤维素对原位化学发泡轻集料混凝土性能的影响

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过程工程学报 2016年第4期16卷 679-683页

作者：樊传刚吴瑞陈贺孟方方李家茂盛玉生安徽工业大学材料科学与工程学院安徽马鞍山243002 马鞍山17冶工程科技有限公司安徽马鞍山243000 安徽舒城盛宏陶粒厂安徽六安231300

以污泥烧胀陶粒为轻集料、羧丙基甲基纤维素(HPMC)为稳泡剂、H_2O_2溶液为化学发泡剂、膨胀珍珠岩为发泡剂载体制备原位发泡轻集料混凝土.结果表明,HPMC掺量为0.05%~0.125%(ω)时具有较好的稳泡和抗离析双重作用,试样密度随HPMC量增加... 详细信息

以污泥烧胀陶粒为轻集料、羧丙基甲基纤维素(HPMC)为稳泡剂、H_2O_2溶液为化学发泡剂、膨胀珍珠岩为发泡剂载体制备原位发泡轻集料混凝土.结果表明,HPMC掺量为0.05%~0.125%(ω)时具有较好的稳泡和抗离析双重作用,试样密度随HPMC量增加而轻微增大,养护28 d的试样抗压、抗折强度和导热系数均随HPMC量增加而增大,48 h的吸水率随其量增加而降低;HPMC掺量为0.125%~0.15%(ω)时,试样性能随其量增加出现相反的变化规律.HPMC掺量为0.125%(ω)时,试样密度为1 245 kg/m^3,养护28 d的试样抗压强度为31 MPa,抗折强度为6 MPa,48 h的吸水率为6.1%,导热系数为0.33 W/(m?K).

关键词：轻集料混凝土原位化学发泡污泥烧胀陶粒稳泡剂

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乡镇企业经济效益分析

内蒙古农牧学院学报 1988年第2期 151-162页

作者：李季圣朱生玉内蒙古农牧学院农牧业经济系

本文主要是分析了呼市郊区乡镇企业近几年经济效益的发展状况、寻求经济效益下降的原因和提高效益的途经,以促进乡镇企业在市场竞争日益激烈的新形势下,能稳步健康的发展。呼市郊区乡村两级乡镇企业发展很快,1981年以来,总产值和总收入... 详细信息

本文主要是分析了呼市郊区乡镇企业近几年经济效益的发展状况、寻求经济效益下降的原因和提高效益的途经,以促进乡镇企业在市场竞争日益激烈的新形势下,能稳步健康的发展。呼市郊区乡村两级乡镇企业发展很快,1981年以来,总产值和总收入年递增率分别为19.39％和18.91％,但经济效益却呈下降趋势,利润率由81年的17.54％下降到86年的10.86％,主要原因是乡镇企业经营管理水平较低,经营承包责任制还没有成为企业的基本管理制度。财务管理混乱,企业普遍不搞成本核算;自有资金少,靠贷款过日子;职工队伍素质不高,技术力量缺乏。为此,必须深化改革,增强企业内在活力,改变落后的经营管理方式,引进竞争机制,积极推行和完善承包责任制,抓紧人才培训工作,不断提高职工素质,加强横向经济联合,变封闭型生产为开放经营,真正使乡镇企业的经济建设工作由追求产值增长转向讲求经济效益的轨道上来。

关键词：乡镇企业经济效益经营承包责任制财务管理横向经济联合职工队伍素质资金的积累和使用

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中速磨煤机用碳精密封环材质对比与选择

中国电力 2006年第7期39卷 92-94页

作者：胡亚非张燕京盛玉生中国矿业大学江苏徐州221008 江苏徐塘发电有限责任公司江苏徐州221000 江苏新海发电有限公司江苏连云港222023

碳精密封环是火电厂中速磨煤机中量大面广、易损的关键性和基础性零部件。针对电厂用户对碳精密封环选用不当导致磨煤机密封环费用成倍增加甚至影响生产的现状,比较了浸锑碳精密封环和浸树脂碳精密封环的制备工艺、加工工艺和生产成本... 详细信息

碳精密封环是火电厂中速磨煤机中量大面广、易损的关键性和基础性零部件。针对电厂用户对碳精密封环选用不当导致磨煤机密封环费用成倍增加甚至影响生产的现状,比较了浸锑碳精密封环和浸树脂碳精密封环的制备工艺、加工工艺和生产成本的重大差异,对材质的机械性能、适用条件、使用效果和使用寿命进行了详细分析,确定了根据磨煤机的煤质情况、以满足磨煤机大修周期使用寿命为前提的最佳碳精密封环性价比选择原则。介绍的碳精密封环材质重量识别方法简单,可帮助电厂正确识别和选择碳精密封环。

关键词：中速磨煤机碳精密封环浸锑浸树脂