Results 11 to 20 of about 13,158 (119)
Mechanoluminescent Mixed‐Anion Borate Sr2B5O9Cl:Eu for Dynamic Anticounterfeiting
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Mechanoluminescence (ML)—the emission of light in response to mechanical stimuli—offers a direct and visually intuitive route for transducing mechanical information into optical signals. Herein, we report a mixed‐anion strategy to prepare mixed‐anion borate Sr2B5O9Cl:Eu phosphors through a facile, low‐temperature, and ambient‐atmosphere solid ...
Yuhong Han +7 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2023 为对一种预制装配式钢-混凝土组合梁栓钉抗剪连接件的构造设计方法和施工安装误差影响进行深入研究，完成了18个预制装配式栓钉连接件和2个普通现浇栓钉连接件的静力推出试验。在优化预制孔填料强度等级的基础上，主要研究栓钉直径、孔径比（预留孔径和栓钉直径的比值）和施工安装误差对预制装配式栓钉连接件破坏形态、抗剪承载力、抗剪刚度及抗滑移性能的影响规律。试验结果表明：连接件的破坏形态为仅栓钉剪断或伴随混凝土开裂的栓钉剪断，安装误差对抗剪刚度影响较大，对抗剪承载力和极限滑移影响很小 ...
霍静思, 陈日正, 魏振, 刘汗青
doaj
Functional Ecology, Volume 40, Issue 7, Page 2068-2082, July 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang +5 more
wiley +1 more source
Higher Education Quarterly, Volume 80, Issue 3, July 2026.ABSTRACT Amid intensified global talent competition and domestic demographic pressures, China, Japan and South Korea (hereafter, ‘Korea’) have expanded their international student policies beyond attraction and recruitment to include stronger measures for post‐study employment and retention, repositioning international students as strategic populations
Lilan Chen, Yingxin Liu, Xin Li
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Jianzhu Gangjiegou Jinzhan, 2017 以试验数据为依据,分别采用我国现行规范有效宽度法、规范拟修订稿有效宽度法和直接强度法计算了202个轴压构件、62个受弯构件、55个压弯构件的稳定承载力,通过试验值与计算结果的对比,综合研究了3种方法之间的差异性,对可靠度进行了定性分析。结果表明,拟修订的有效宽度法和直接强度法所得试验值与计算值之比的平均值更接近于1.0,且计算结果偏于安全,优于现行规范有效宽度法。从变异系数的结果可以看出修订有效宽度法和直接强度法的计算结果相差不大,并且它们的离散性都比现行规范有效宽度法小。
王春刚, 孔德礼, 张耀春
doaj
He jishu无损检测反应堆乏燃料棒内部结构是燃料辐照后性能评价的一项重要内容，相比其他射线检测方式，中子成像在强放射性燃料棒检测上有穿透性强、图像灵敏度高、间接成像可避免成像元器件辐照损伤等独特优势。本研究利用中国先进研究堆（China Advanced Research Reactor，CARR）中子成像设施，在中子注量率为1×108 n·cm-2·s-1、中子束流的准直比为63的试验条件下，分别采用间接成像法与直接成像法开展了带有人工缺陷的燃料棒模拟件与真实乏燃料样品的无损检测实验，并对比两种成像方式的优劣 ...
汤 琪 +8 more
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基于显著性信息的Fit CutMix数据增强算法在医学影像上的应用
智能科学与技术学报, 2023 深度卷积神经网络是图像分类领域的主流算法之一，但是其训练需要大量标注数据，在阿尔茨海默病医学影像等小数据集上易出现过拟合现象。数据增强算法可以用于扩充数据量，其中 CutMix 数据增强算法近来被广泛应用，但是现有方法生成的增强图像往往忽略原始图像显著区域，且增强图像的标签设计考虑的因素较为单一。针对这些问题，提出Fit CutMix数据增强算法。该算法一是利用基于显著性极值迁移的区域替换策略生成增强样本，集中源样本与目标样本中显著性高的区域；二是综合源样本与目标样本的面积和显著性信息赋予增强样本标签 ...
罗欣欢, 王奕璇, 李炜, 陈曦
doaj +1 more source
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Electromagnetic wave absorption materials require high dielectric loss and excellent impedance matching performance. However, current conventional biomass‐derived electromagnetic wave absorption materials are still limited by low electrical conductivity and a single structure.
Yue Zhang +9 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2013 结构强度折减系数是基于强度抗震设计法中确定设计地震作用的关键。我国现行《建筑抗震设计规范》[1]（GB 50011—2010,简称《规范》）对不同的结构体系采用单一的强度折减系数,不尽合理。在已有强度折减系数方法基础上,提出了以中震位移限值为极限位移的改进间接确定强度折减系数方法,将其应用于钢框架结构强度折减系数中,并与直接强度折减系数方法进行对比分析,验证了此方法的有效性和准确性,研究表明钢框架结构强度折减系数不受建筑层数的影响,其强度折减系数接近于4。
张伟莉, 李钢
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The urgent environmental crisis caused by polyethylene terephthalate (PET) waste necessitates efficient upcycling strategies. Herein, we establish a novel pathway to transform waste PET plastic into a high‐performance catalytic material for mediating the oxygen evolution reaction (OER). Through a one‐step hydrothermal process, waste PET serves
Xin Wang +5 more
wiley +1 more source