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西南交通大学学报 2021年第4期56卷 828-838页

作者：张士前陈越时刘亚男马昕煦廖显东肖绪文中国建筑第八工程局有限公司上海200122 中国建筑股份有限公司北京100037 同济大学土木工程学院上海200092

装配式剪力墙结构是我国高层住宅常用的结构形式之一,其可靠的竖向连接是保证结构安全的关键.按照竖向分布钢筋在楼层处连接数量(连接程度)不同,装配式剪力墙竖向连接可分为全部连接、部分连接和不连接3种.基于国内外相关的研究成果,系... 详细信息

装配式剪力墙结构是我国高层住宅常用的结构形式之一,其可靠的竖向连接是保证结构安全的关键.按照竖向分布钢筋在楼层处连接数量(连接程度)不同,装配式剪力墙竖向连接可分为全部连接、部分连接和不连接3种.基于国内外相关的研究成果,系统总结了3种连接程度装配式剪力墙的竖向分布钢筋连接形式、构造特点与受力性能,并深入分析了竖向分布钢筋连接程度对剪力墙抗震性能影响,全面梳理了其研究存在的不足.在此基础上,提出基于剪力墙截面受压、受剪承载力等效原则的一种竖向分布钢筋不连接边缘构件现浇装配式剪力墙结构,并给出相关设计计算方法.最后对装配式剪力墙新型连接技术与无损检测技术等方面做出了展望,并指出竖向分布钢筋不连接装配式剪力墙结构是未来更具前景发展方向之一.

关键词：装配式剪力墙竖向分布钢筋连接程度强度等效原则设计计算方法

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Theoretical prediction of electronic, mechanical, and thermodynamic properties of layered ternary compounds (UC) n M 3 C 2 (M=Si or Al;n=1,2) and two-dimensional U 2 C

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Nuclear Engineering and Technology 2025年第10期57卷

作者： Yaxian Shi Chengzhen Miao Yujuan zhang Jianhui Lan xuwen Zhao Changchun Ge Xinggang Li School of Materials Science and Engineering University of Science and Technology Beijing 100083 Beijing China Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China Department of Materials Science and Engineering Southern University of Science and Technology (SUSTech) Shenzhen 518055 China

Following the 2011 Fukushima Daiichi nuclear catastrophe, there has been a significant surge in interest towards innovative materials capable of enhancing the safety, performance, and efficiency of nuclear reactors. This study introduces a new class of layered ternary compounds, specifically (UC) n Si 3 C 2 (n = 1,2), and derived two-dimensional (2D) U 2 C, discovered through first-principles calculations. We predict the electronic, mechanical, and thermodynamic properties of these compounds within the PBE and PBE + U frameworks, with a comparative analysis of the (UC) n Al 3 C 2 (n = 1,2) series. Our findings reveal that the USi 3 C 3 and U 2 Si 3 C 4 compounds exhibit mechanical and dynamic stabilities, suggesting their potential for experimental synthesis under specific conditions. These compounds demonstrate superior mechanical and thermal properties as nuclear fuels, including higher elastic moduli and improved ductility compared to (UC) n Al 3 C 2 compounds. The mechanical and dynamical stabilities of 2D U 2 C are confirmed, and the calculated thermal conductivity and mechanical properties position it as a promising candidate for high-performance nuclear fuel applications. We anticipate that the present work will bolster future experimental endeavors and help explore the practical applications of these novel materials in future nuclear systems.

关键词： Ternary layered carbides 2D U 2 C First-principle calculations Novel nuclear fuels

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Biocompatibility and effectiveness evaluation of a new hemostasic embolization agent: thrombin-loaded alginate-calcium microspheres

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JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY 2017年第16期70卷 C190-C191页

作者： Zhao, Lijun Li, Yang Rong, Jingjing Liang, Ming zhang, xuwen Sun, Jingyang Jun, Li Liu, Dan Gao, Naijing Li, Fei Wang, Xiaozeng Han, Yaling Shuang, Wang Peoples Liberat Army Inst Cardiovasc Res Dept Cardiol Beijing Peoples R China

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基于InSAR技术的中国地表形变一张图研制

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测绘地理信息 2024年第2期49卷 1-12页

作者：张过王舜瑶陈振炜秦绪文徐子兴刘峻宁刘宇涛周军元苏逸平武汉大学测绘遥感信息工程国家重点实验室湖北武汉430079 南阳师范学院河南南阳473000 中国地质调查局北京100037 千寻位置网络有限公司上海200438 湖北省测绘工程院湖北武汉430074 浙江省国土空间规划研究院浙江杭州311121

地表形变危害巨大且深远,利用合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)技术监测地表形变虽已较为成熟,但是超大范围,甚至全国范围的地表形变快速提取仍充满挑战。为快速获取全国地表形变信息,设计了一种... 详细信息

地表形变危害巨大且深远,利用合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)技术监测地表形变虽已较为成熟,但是超大范围,甚至全国范围的地表形变快速提取仍充满挑战。为快速获取全国地表形变信息,设计了一种基于超算并行计算的广域地表形变快速提取优化方法,并对干涉集基线组合方法、广域相位解缠算法、大气效应改正方法等进行了改进和创新。基于该方法,采用10157景哨兵1号数据,研制了中国全境2021年度40m分辨率地表形变速率图,经验证形变速率精度为4.82mm/a,有效覆盖度为94.6%,图幅间无明显接边差异。同时对国内典型地表形变区域进行了分析。研究为广域地表形变常态化快速提取提供了参考。

关键词：地表形变合成孔径雷达干涉测量(interferometric synthetic aperture radar,In SAR) 广域地表形变快速提取哨兵1号

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Bright optical eigenmode with about 1 nm3 volume

arXiv

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arXiv 2020年

作者： Li, Wancong Zhou, Qiang zhang, Pu Chen, xuwen School of Physics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Luoyu Road 1037 Wuhan430074 China

Concentrating optical field in an eigenmode with a tiny volume is vitally important for light-matter interactions at the fundamental level and underpins new technologies. In the past decades, researchers have investigated various approaches to shrink light and so far managed to reduce the volume of optical eigenmodes, under the quantum-optical definition, down to several ten nm3. Here we report on the discovery, characterization and engineering of a class of extremely localized eigenmodes that are resonances of atomistic protrusions on a metallic host nanoparticle and feature quantum-optical mode volumes of below 1 nm3. We theoretically demonstrate that these extremely localized modes can be made bright with radiation efficiencies reaching 30% and provide up to 4×107 times intensity enhancement. The existence of bright eigenmodes with the volume comparable to a photon emitter foresees exciting new optical physics, such as ultrastrong coupling with single optical emitters, angstrom-resolution optical imaging, and atomic-scale single-molecule photochemistry. Copyright © 2020, The Authors. All rights reserved.

关键词： Atomic physics

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Recent advances in bubble-based technologies: Underlying interaction mechanisms and applications

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APPLIED PHYSICS REVIEWS 2021年第1期8卷

作者： Qiao, Chenyu Yang, Diling Mao, Xiaohui Xie, Lei Gong, Lu Peng, xuwen Peng, Qiongyao Wang, Tao zhang, Hao Zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada

Gas bubbles widely exist in nature and numerous industrial processes. The physicochemical characteristics of bubbles such as large specific surface area, low density, and hydrophobicity make them an ideal platform for developing colloidal and interfacial technologies. Over the past few decades, much effort has been devoted to investigating the properties and behaviors of bubbles and their applications. A series of bubble-based technologies (BBTs) have been developed, which have attracted increasing attention and shown great importance in a wide range of engineering, material, and biological fields. These BBTs, such as bubble flotation and the bubble-liposome system, provide feasible and promising solutions to mineral separation, material assembling, medical diagnosis, and drug delivery. In this work, we have systematically reviewed the physicochemical characteristics of bubbles and how to modulate their behaviors in complex fluid systems, as well as the underlying fundamental interaction mechanisms of bubbles in related BBTs. Advanced nanomechanical techniques such as atomic force microscopy, which are used to quantify the interaction mechanisms in bubble-containing systems, have been introduced. The effects of various influential factors on the bubble behaviors are discussed, which provide potential approaches to improve the controllability and performance of BBTs. The recent advances in the applications of selected BBTs in engineering, biomedical, and material areas are presented. Some remaining challenging issues and perspectives for future studies have also been discussed. This review improves the fundamental understanding of characteristics and surface interaction mechanisms of bubbles, with useful implications for developing advanced BBTs.

关键词： Diagnosis

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Synthesis of hybrid dendritic mesoporous silica titanium nanoparticles to stabilize Pickering emulsions for enhanced oil recovery

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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 2021年 628卷 127237-127237页

作者： Jia, Han He, Juan Xu, Yingbiao Wang, Tingyi zhang, Lingyu Fan, Fangning Qin, xuwen Li, Zhe Lv, Kaihe Wang, Yabin China Univ Petr East China Sch Petr Engn Shandong Key Lab Oilfield Chem Qingdao 266580 Peoples R China China Univ Petr East China Minist Educ Key Lab Unconvent Oil & Gas Dev Qingdao 266580 Peoples R China SINOPEC Technol Inspect Ctr Shengli Oilfield Co Dongying 257000 Peoples R China Yanan Univ Coll Chem & Chem Engn Shaanxi Key Lab Chem React Engn Yanan 716000 Peoples R China

Nanoparticles stabilized Pickering emulsions have been widely applied in various fields. The size and morphology of nanoparticles are regarded as crucial factors for the emulsion stability. In this study, the dendritic mesoporous silica nanoparticles (DMSNs) and two kinds of hybrid dendritic mesoporous silica titanium nanoparticles (DMSTNs-0.01 and DMSTNs-0.03) have been successfully prepared and investigated for their potential application to stabilize Pickering emulsions. Scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and UV-Vis diffuse reflectance spectra are employed to confirm the successful fabrication of the nanoparticles. The stability of DMSNs and DMSTNs stabilized emulsions are systematically evaluated via the optical microscopy and static multiple light scattering. The DMSTNs-0.01 displays the greatest ability to stabilize emulsions. N-2 physisorption and atomic force microscopy demonstrate the stability of Pickering emulsions is closely related to the specific surface area and surface roughness of nanoparticles. Moreover, DMSTNs-0.01 stabilized O/W Pickering emulsions show satisfactory displacement performance (tertiary oil recovery of 14.05%) in core flooding experiments. Microscopic visualization tests further indicate the emulsions can effectively block the high permeability channels generated by initial water flooding to increase the flowing resistance and then cause the flow diversion of the repellent fluid to enlarge the sweep area.

关键词： Hybrid dendritic mesoporous silica titanium nanoparticles Pickering emulsions Surface roughness Specific surface area EOR

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IMageSEM at ImagecleFmed caption 2019 task: A two-stage medical concept detection strategy 20

IMageSEM at ImagecleFmed caption 2019 task: A two-stage medi...

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20th Working Notes of CLEF Conference and Labs of the Evaluation Forum, CLEF 2019

作者： Guo, Zhen Wang, xuwen zhang, Yu Li, Jiao Institute of Medical Information Medical Library Chinese Academy of Medical Sciences Peking Union Medical College Beijing100020 China

This paper presents the participation of the Image Semantics group (ImageSem) of the Institute of Medical Information at the ImageCLEFmed Caption task, which was launched by ImageCLEF 2019. The Concept Detection sub-task aims at identifying 5,528 semantic concepts from 70,786 training images and 10,000 test images. In this study, we proposed the two-stage concept detection strategy, including the medical image pre-classification based on body parts and the transfer learning-based multi-label classification model. We totally submitted 10 runs in the final evaluation. The evaluation results showed that we achieved an F1 Score of 0.2235, which ranked 8th overall. There is still a great room for improving the performance of concept detection from large-scale medical images. © 2019 CEUR-WS. All rights reserved.

关键词： Classification (of information)

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Smart hypoxia-responsive transformable and charge-reversible nanoparticles for the deep penetration and tumor microenvironment modulation of pancreatic cancer

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BIOMATERIALS 2022年第0期287卷 000-000页

作者： Chen, Hongyi Guo, Qin Chu, Yongchao Li, Chao zhang, Yiwen Liu, Peixin Zhao, Zhenhao Wang, Yu Luo, Yifan Zhou, Zheng zhang, Tongyu Song, Haolin Li, xuwen Li, Chufeng Su, Boyu You, Haoyu Sun, Tao Jiang, Chen Fudan Univ Key Lab Smart Drug Delivery State Key Lab Med Neurobiol Dept PharmaceutSch PharmInst Brain SciMinist Ed Shanghai 201203 Peoples R China Fudan Univ Inst Brain Sci MOE Frontiers Ctr Brain Sci Sch PharmDept Pharmaceut Shanghai 201203 Peoples R China

The compact extracellular matrix (ECM) of pancreatic ductal adenocarcinoma (PDAC) is the major physical barrier that hinders the delivery of anti-tumor drugs, leading to strong inherent chemotherapy resistance as well as establishing an immunosuppressive tumor microenvironment (TME). However, forcibly destroying the stroma barrier would break the balance of delicate signal transduction and dependence between tumor cells and matrix components. Uncontrollable growth and metastasis would occur, making PDAC more difficult to control. Hence, we design and construct an aptamer-decorated hypoxia-responsive nanoparticle s(DGL)(n)@Apt co-loading gemcitabine monophosphate and STAT3 inhibitor HJC0152. This nanoparticle can reverse its surficial charge in the TME, and reduce the size triggered by hypoxia. The released ultra-small DGL particles loading gemcitabine monophosphate exhibit excellent deep-tumor penetration, chemotherapy drugs endocytosis promotion, and autophagy induction ability. Meanwhile, HJC0152 inhibits overactivated STAT3 in both tumor cells and tumor stroma, softens the stroma barrier, and reeducates the TME into an immune-activated state. This smart code -livery strategy provides an inspiring opportunity in PDAC treatment.

关键词： Hypoxia-responsive Sizereduction Chargereversal Deeppenetration TMEmodulation

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基于德尔菲法构建慢性心力衰竭病人居家容量管理行为偏差评估工具

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护理研究 2024年第13期38卷 2281-2287页

作者：徐佳忆张慧超孙兴陈辰徐冬梅殷徐雯宋海燕周媛顾则娟南京中医药大学护理学院江苏210023 南京医科大学附属妇产医院南京医科大学护理学院南京医科大学第一附属医院

目的:构建慢性心力衰竭病人居家容量管理行为偏差评估工具。方法:通过文献回顾、半结构化访谈、小组讨论、专家函询形成慢性心力衰竭病人居家容量管理行为偏差评估工具初稿,采用德尔菲法进行2轮专家函询,对评估工具各条目进行修订,形成... 详细信息

目的:构建慢性心力衰竭病人居家容量管理行为偏差评估工具。方法:通过文献回顾、半结构化访谈、小组讨论、专家函询形成慢性心力衰竭病人居家容量管理行为偏差评估工具初稿,采用德尔菲法进行2轮专家函询,对评估工具各条目进行修订,形成最终评估工具。结果:2轮专家咨询积极系数为88.00%和90.91%,权威系数分别为0.891和0.900,肯德尔协调系数(Kendall′s W)值分别为0.108和0.206,均P<0.001。最终形成的评估工具共有8个维度、49个条目,即基本信息(6个条目),限制液体摄入量(6个条目),监测液体排出量(6个条目),限制钠盐摄入(8个条目),监测体重(8个条目),监测心力衰竭相关症状体征及血压、心率(6个条目),关注就医指征(4个条目)和利尿剂的调整时机(5个条目)。结论:基于德尔菲法构建的慢性心力衰竭病人居家容量管理行为偏差评估工具具有较高的可靠性,可用于慢性心力衰竭病人居家容量管理行为偏差现状及影响因素的调查,为提高病人院外自我管理能力、改善容量管理现状、制定干预方案提供参考依据。

关键词：慢性心力衰竭容量管理行为偏差延续性护理德尔菲法

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