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Magnetic nanoparticle-modified hollow double-shell SiC@C@FeCo with excellent electromagnetic wave absorption

Nano Research 2024年第4期17卷 3164-3174页

作者： Guiyu Peng Jintang Zhou jiaqi tao Weize Wang Jun Liu Junru Yao Yijie Liu Zhengjun Yao College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211100China

Integrated micro and nanostructures,heterogeneous components,defects,and interfaces is the way to develop high-performance microwave absorbing ***,there still needs to be more precise experimental routes and effective *** this work,by a continuous process of vacuum sintering,hydrothermal,and carbon thermal reduction,magnetic FeCo nanoparticles were successfully embedded on the hollow double-shell mesoporous SiC@C surface,thus solving the challenges of a single component loss *** hollow double-shell nanostructure introduces air to enhance impedance matching while significantly reducing the density of the *** extensive defects and heterogeneous grain boundaries effectively enhance the polarization loss *** magnetic loss mechanism introduced by the magnetic particles effectively improves the impedance matching properties of the *** synergy of these multiple advantages has enabled the SCFC_(2)-8(here SiC@C@FeCo is abbreviated to SCFC,2 represents the initial metal ion content,and 8 represents the hydrothermal time)sample to achieve an adequate absorption bandwidth of 6.09 GHz at 2.0 *** a minimum reflection loss of-60.56 dB,the absorption bandwidth can cover the entire C,X,and Ku bands by adjusting the matching thickness(1.3–4.0 mm).This work provides a valuable paradigm for the deeper exploitation of microwave absorption potential and guides the development of other high-performance materials.

关键词： SiC@C@FeCo(SCFC)composites core–shell hollow structure microwave absorption

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敦煌壁画飞天形象在中国人物画中的运用和发展探究

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艺术科技 2024年第11期37卷 41-43页

作者：陶佳琪南通大学艺术学院江苏南通226019

目的:文章研究敦煌壁画飞天形象在中国人物画中的运用和发展,通过对敦煌壁画飞天形象的特点进行剖析,结合中国人物画的艺术特色,探讨飞天形象在中国人物画中的独特表现方式和艺术风格,及其未来发展趋势。方法:通过对比分析不同时期飞天... 详细信息

目的:文章研究敦煌壁画飞天形象在中国人物画中的运用和发展,通过对敦煌壁画飞天形象的特点进行剖析,结合中国人物画的艺术特色,探讨飞天形象在中国人物画中的独特表现方式和艺术风格,及其未来发展趋势。方法:通过对比分析不同时期飞天形象的演变轨迹,揭示其对中国人物画发展的重要影响;采用案例分析法,鉴赏不同时期画家的人物画特点,分析敦煌飞天形象对中国人物画发展的影响。结果:敦煌壁画飞天形象具有丰富的象征意义和艺术内涵,对中国人物画的创作和表现方式产生了深远影响,为中国人物画的发展提供了灵感来源。在艺术创作过程中,中国人物画创作者可以根据敦煌飞天形象设计出更饱满的艺术形象,也能使敦煌飞天形象为更多艺术爱好者所接受。结论:敦煌壁画飞天形象在中国人物画中具有独特地位和重要价值,为中国人物画的研究和创作提供了新的视角和思路。

关键词：敦煌壁画飞天形象人物画中国古代艺术艺术发展

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Control of fine particulate nitrate during severe winter haze in“2+26”cities

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Journal of Environmental Sciences 2024年第2期136卷 261-269页

作者： Chuang Qin Xiao Fu tao Wang Jian Gao jiaqi Wang Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Civil and Environmental Engineering Hong Kong Polytechnic UniversityHong Kong 99907China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 10084China

The“2+26”cities,suffering the most severe winter haze pollution,have been the key region for air quality improvement in *** prominent nitrate pollution is one of the most challenging environmental issues in this region,necessitating development of an effective control ***,we use observations,and state-of-the-art model simulations with scenario analysis and process analysis to quantify the effectiveness of the future SO_(2)-NO_(X)-VOC-NH_(3) emission control on nitrate pollution mitigation in“2+26”*** on a serious winter haze episode,we find that limited NO_(X)emission reduction alone in the short-term period is a less effective choice than VOC or NH_3emission reduction alone to decrease nitrate concentrations,due to the accelerated NO_(X)-HNO_(3)conversion by atmospheric oxidants and the enhanced HNO_(3)to NO_(3)^(-)partition by ammonia,although deep NO_(X)emission reduction is essential in the long-term *** synergistic NH_(3) and VOC emission control is strongly recommended,which can counteract the adverse effects of nonlinear photochemistry and aerosol chemical feedback to decrease nitrate *** extra benefits will be reduced if the synergistic NH_(3) and VOC reduction is delayed,and thus reducing emission of multiple precursors is urgently required for the effective control of increasingly severe winter nitrate pollution in“2+26”cities.

关键词： Nitrate Winter haze pollution Emission reduction “2+26”cities

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基于永磁体间磁力作用的不倒杆

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大学物理实验 2024年第3期37卷 22-26页

作者：吕庆荣蒋宇胡华磊汪澈陶嘉琪李浩冯双久安徽大学物理与光电工程学院安徽合肥230601 安徽大学材料科学与工程学院安徽合肥230601 安徽大学集成电路学院安徽合肥230601

利用永磁体间的同极相斥作用,构造一个磁力势阱,设计制作高度可调、底部防滑的不倒杆装置。该装置抗干扰能力强、稳定性好,结构简单、设计巧妙,永磁体间磁力约束不需要外界提供电源,具有无接触控制、节能低成本等优势。

关键词：平衡与稳定永磁体间磁力作用不倒杆

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Studying the variable energy band structure for energy storage materials in charge/discharge process

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Chinese Chemical Letters 2024年第2期35卷 584-589页

作者： Xuancheng Chen Yu Huan Ningqiang Sun Yuanhui Su Xuesong Shen Guoqing Li jiaqi Zhang tao Wei University of Jinan Ji'nan 250022China Weichai Power Co. Ltd.Weifang 261061China

So far,a clear understanding about the relationship of variable energy band structure with the corresponding charge-discharge process of energy storage materials is still ***,using optical spectroscopy(red-green-blue(RGB)value,reflectivity,transmittance,UV-vis,XPS,UPS)to studyα-Co(OH)_(2) electrode working in KOH electrolyte as the research object,we provide direct experimental evidence that:(1)The intercalation of OH-ions will reduce the valence/conduction band(VB and CB)and band gap energy(Eg)values;(2)The deintercalation of OH-ions corresponds with the reversion of VB,CB and E_(g) to the initial values;(3)The color of Co(OH)_(2) electrode also exhibit regular variations in RGB value during the charge-discharge process.

关键词： Variable energy band structure Energy storage materials Charge-discharge process Optical spectroscopy Supercapacitors

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Analysis of the joint detection capability of the SMILE satellite and EISCAT-3D radar

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Earth and Planetary Physics 2024年第1期8卷 299-306页

作者： JiaoJiao Zhang TianRan Sun XiZheng Yu DaLin Li Hang Li jiaqi Guo ZongHua Ding tao Chen Jian Wu Chi Wang State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Key Laboratory of Solar Activity and Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 101408China Key Laboratory of Electronics and Information Technology for Space Systems Chinese Academy of SciencesBeijing 100190China China Research Institute of Radio-wave Propagation Qingdao 266075China

The Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite is a small magnetosphere–ionosphere link explorer developed cooperatively between China and *** pioneers the use of X-ray imaging technology to perform large-scale imaging of the Earth’s magnetosheath and polar cusp *** uses a high-precision ultraviolet imager to image the overall configuration of the aurora and monitor changes in the source of solar wind in real time,using in situ detection instruments to improve human understanding of the relationship between solar activity and changes in the Earth’s magnetic *** SMILE satellite is scheduled to launch in *** European Incoherent Scatter Sciences Association(EISCAT)-3D radar is a new generation of European incoherent scatter radar constructed by EISCAT and is the most advanced ground-based ionospheric experimental device in the high-latitude polar *** has multibeam and multidirectional quasi-real-time three-dimensional(3D)imaging capabilities,continuous monitoring and operation capabilities,and multiple-baseline interferometry *** detection by the SMILE satellite and the EISCAT-3D radar is of great significance for revealing the coupling process of the solar wind–magnetosphere–***,we performed an analysis of the joint detection capability of the SMILE satellite and EISCAT-3D,analyzed the period during which the two can perform joint detection,and defined the key scientific problems that can be solved by joint *** addition,we developed Web-based software to search for and visualize the joint detection period of the SMILE satellite and EISCAT-3D radar,which lays the foundation for subsequent joint detection experiments and scientific research.

关键词： Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)satellite European Incoherent Scatter Sciences Association(EISCAT)-3D radar joint detection

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Research on the Comprehensive Development Trend of National Fitness Activity Centers

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Journal of World Architecture 2024年第3期8卷 84-92页

作者： Liang tao jiaqi Wang South China University of Technology Guangzhou 510000Guangdong ProvinceChina

With the further advancement of the“National Fitness”strategy and the continuous development of the information age,the National Fitness Activity Centers have become more *** comprehensiveness is reflected in the design of diversified sports functions and *** article serves to explore the comprehensive development trend of National Fitness Activity *** summarizing and sorting out domestic and foreign cases,the trend of the comprehensive development of National Fitness Activity Centers is predicted at three levels:industry,city,and individual functions.

关键词： National fitness National fitness activity center Comprehensive development trend

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Lymph node-biomimetic scaffold boosts CAR-T therapy against solid tumor

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National Science Review 2024年第4期11卷 206-215页

作者： Ziyan Liao Jie Jiang Wei Wu jiaqi Shi Yanfang Wang Yuejun Yao tao Sheng Feng Liu Wei Liu Peng Zhao Feifei Lv Jie Sun Hongjun Li Zhen Gu Department of General Surgery Sir Run Run Shaw Hospital School of Medicine Zhejiang University National Key Laboratory of Advanced Drug Delivery and Release Systems College of Pharmaceutical Sciences Zhejiang University Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang University Liangzhu Laboratory Zhejiang University Bone Marrow Transplantation Center of the First Affiliated Hospital and Department of Cell Biology Zhejiang University School of Medicine Department of Medical Oncology The First Affiliated Hospital School of Medicine Zhejiang University Department of Laboratory Medicine The First Affiliated Hospital Zhejiang University School of Medicine Department of Hepatobiliary and Pancreatic Surgery The Second Affiliated HospitalSchool of MedicineZhejiang University Jinhua Institute of Zhejiang University MOE Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Department of Polymer Science and EngineeringZhejiang University

The limited infiltration and persistence of chimeric antigen receptor(CAR)-T cells is primarily responsible for their treatment deficits in solid tumors. Here, we present a three-dimensional scaffold, inspired by the physiological process of T-cell proliferation in lymph nodes. This scaffold gathers the function of loading,delivery, activation and expansion for CAR-T cells to enhance their therapeutic effects on solid tumors. This porous device is made from poly(lactic-co-glycolic acid) by a microfluidic technique with the modification of T-cell stimulatory signals, including anti-CD3, anti-CD28 antibodies, as well as cytokines. This scaffold fosters a 50-fold CAR-T cell expansion in vitro and a 15-fold cell expansion in vivo. Particularly, it maintains long-lasting expansion of CAR-T cells for up to 30 days in a cervical tumor model and significantly inhibits the tumor growth. This biomimetic delivery strategy provides a versatile platform of cell delivery and activation for CAR-T cells in treating solid tumors.

关键词： drug delivery cell therapy bioinspired biomaterials cancer immunotherapy

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制造领域知识图谱的应用研究现状与前沿

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计算机集成制造系统 2022年第12期28卷 3720-3736页

作者：陶家琦李心雨郑湃彭涛许开州鲍劲松浙江大学流体动力与机电系统国家重点实验室浙江杭州310027 东华大学机械工程学院上海201620 香港理工大学工业与系统工程系中国香港999077 上海新力动力设备研究所上海201109

在制造系统中获取并利用知识辅助决策,发展认知学习能力,已成为发展新一代智能制造的核心需求,而知识图谱为满足这一需求提供了成熟的条件。知识图谱与制造系统的融合应用成为今后发展的必然趋势。为全面深入地了解制造领域知识图谱的... 详细信息

在制造系统中获取并利用知识辅助决策,发展认知学习能力,已成为发展新一代智能制造的核心需求,而知识图谱为满足这一需求提供了成熟的条件。知识图谱与制造系统的融合应用成为今后发展的必然趋势。为全面深入地了解制造领域知识图谱的研究现状并探究其发展应用前沿,在充分搜集整理现有文献的基础上,首先从发文量趋势、文章关键词、研究的关键技术和涉及的案例场景等多个维度进行了统计和分析,然后根据现有研究成果的共性总结出制造领域知识图谱的三个应用层次:语义关联、定性决策和综合决策,最后总结了制造领域知识图谱面临的高质量制造知识获取、复杂制造知识表示、行业制造图谱开放共享等一系列复杂挑战,并对制造领域知识图谱在应用层次、动态时效性和服务对象等方面的未来发展进行展望。

关键词：知识图谱认知智能智能制造认知制造知识工程

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A Global Optimality Principle for Fully Coupled Mean-field Control Systems

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 379-413页

作者： tao HAO School of Statistics and Mathematics Shandong University of Finance and EconomicsJinan 250014China

This paper concerns a global optimality principle for fully coupled mean-field control *** the first-order and the second-order variational equations are fully coupled mean-field linear FBSDEs. A new linear relation is introduced, with which we successfully decouple the fully coupled first-order variational equations. We give a new second-order expansion of Y^(ε) that can work well in mean-field framework. Based on this result, the stochastic maximum principle is proved. The comparison with the stochastic maximum principle for controlled mean-field stochastic differential equations is supplied.

关键词： optimal control global maximum principle fully coupled general mean-field FBSDE adjoint equation recursive utility

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