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Overcoming side reaction effects in the colloidal synthesis of ZnSe/ZnS core/shell quantum dots with an etching strategy

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Nano Research 2024年第8期17卷 7020-7026页

作者： jinhua he Chenhui Wang Mingrui Liu Muhammad Ramzan Zhiwei Long Xian-gang Wu Yu Chen Haizheng Zhong MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Engineering Research Center for Mixed Reality and Advanced Display Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

The potential use of large-size ZnSe quantum dots as blue emitters for display applications has greatly inspired the colloidal ***,we report the negative effects of side reactions of large-size ZnSe quantum *** side reactions between oleic acid and oleylamine generated amidation products and H_(2)O,which led to the hydrolysis of Zn(OA)2 to Zn(OH)2 and the subsequent formation of zinc oxide(ZnO)and zinc bis[diphenylphosphinate](Zn(DPPA)2)*** side reactions resulted in the formation of a defective surface including a Se-rich surface and oxygen-related *** negative effects can be overcome by adopting an etching strategy using potassium fluoride and myristic acid in *** overcoating a ZnS shell,blue emissive ZnSe/ZnS quantum dots with a maximum photoluminescence quantum yield of up to 91%were *** further fabricated ZnSe quantum dots-based blue light-emitting diodes with an emission peak at 456 *** device showed a turn-on voltage of 2.7 V with a maximum external quantum efficiency of 4.2%and a maximum luminance of 1223 cd·m^(−2).

关键词： quantum dots ZnSe side reactions surface etching light-emitting diodes

Can near-to-mid Infrared Spectral Energy Distribution Quantitatively Trace Protoplanetary Disk Evolution?

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Research in Astronomy and Astrophysics 2024年第7期24卷 34-46页

作者： Mingchao Liu jinhua he Zhen Guo Jixing Ge Yuping Tang Yunnan Observatories Chinese Academy of SciencesKunming 650216China Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Departamento de Astronomía Universidad de ChileLas Condes7591245 SantiagoChile Instituto de Física y Astronomía Universidad de Valparaísoave.Gran Bretaña1111Casilla 5030ValparaísoChile Centre for Astrophysics Research University of HertfordshireHatfield AL109ABUK Millennium Institute of Astrophysics Nuncio Monseñor Sotero Sanz 100Of.104ProvidenciaSantiagoChile Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Shanghai Key Lab for Astrophysics Shanghai Normal UniversityShanghai 200234China

Infrared(IR)spectral energy distribution(SED)is the major tracer of protoplanetary *** was recently proposed to use the near-to-mid IR(or K-24)SED slopeαdefined between 2 and 24μm as a potential quantitative tracer of disk *** critically examine the viability of this idea and confront it with additional statistics of IR luminosities and SED *** point out that,because the statistical properties of most of the complicated physical factors involved in disk evolution are still poorly understood in a quantitative sense,the only viable way is to assume them to be random so that an idealized“average disk”can be defined,which allows theαhistogram to trace its *** confirm that the statistics of the zeroth order(luminosity),first order(slopeα),and second order characteristics(concavity)of the observed K-24 SEDs indeed carry useful information upon the evolutionary processes of the“average disk”.We also stress that intrinsic diversities in K-24 SED shapes and luminosities are always large at the level of individual stars so that the application of the evolutionary path of the“average disk”to individual stars must be done with *** data of most curves in plots are provided on GitHub(Disk-age package https://***/starage/disk-age/).

关键词： stars formation-stars pre-main sequence-stars protostars-infrared stars-protoplanetary disks

Multifunctional Nacre‑Like Nanocomposite Papers for Electromagnetic Interference Shielding via heterocyclic Aramid/MXene Template‑Assisted In‑Situ Polypyrrole Assembly

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Nano-Micro Letters 2025年第3期17卷 37-54页

作者： jinhua Xiong Xu Zhao Zonglin Liu he Chen Qian Yan Huanxin Lian Yunxiang Chen Qingyu Peng Xiaodong he National Key Laboratory of Science and Technology On Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080People’s Republic of China

Robust, ultra-flexible, and multifunctional MXene-basedelectromagnetic interference (EMI) shielding nanocomposite filmsexhibit enormous potential for applications in artificial intelligence,wireless telecommunication, and portable/wearable electronic *** this work, a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole (PPy) (HMP) nanocomposite paper withlarge-scale, high strength, super toughness, and excellent tolerance tocomplex conditions is fabricated through the strategy of HA/MXenehydrogel template-assisted in-situ assembly of PPy. Benefiting from the"brick-and-mortar" layered structure and the strong hydrogen-bondinginteractions among MXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 MPa),outstanding toughness (57.6 MJ m−3), exceptional foldability, and structural stability against ultrasonication. By using the template effect ofHA/MXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness (EMI SE) of 54.1 dBat an ultra-thin thickness (25.4 μm) and a high specific EMI SE of 17,204.7 dB cm2g−1. In addition, the papers also have excellent applicationsin electromagnetic protection, electro-/photothermal de-icing, thermal therapy, and fire safety. These findings broaden the ideas for developinghigh-performance and multifunctional MXene-based films with enormous application potential in EMI shielding and thermal management.

关键词： MXene Remarkable mechanical properties heterocyclic aramid Electromagnetic interference shielding Polypyrrole Multifunctionality

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基于内嵌式SMA电机的多指手驱动控制系统

华中科技大学学报（自然科学版） 2007年第6期35卷 64-66页

作者：杨凯贺晋华辜承林华中科技大学电气与电子工程学院湖北武汉430074

提出了嵌入式方法,室温时将多根形状记忆合金丝嵌入液态橡胶中固化成弹性棒,由此构成内嵌式形状记忆合金电机.以结构小巧紧凑、功能完备稳定的人手为模型与目标,直接将内嵌式形状记忆合金电机作为指节,构造多指拟人机械手.阐述了记忆合... 详细信息

提出了嵌入式方法,室温时将多根形状记忆合金丝嵌入液态橡胶中固化成弹性棒,由此构成内嵌式形状记忆合金电机.以结构小巧紧凑、功能完备稳定的人手为模型与目标,直接将内嵌式形状记忆合金电机作为指节,构造多指拟人机械手.阐述了记忆合金机械手的驱动控制系统的构成与实现.对DSP最小系统、加热模块、检测模块进行了设计.进行了软件系统的规划和实现,构建了完整的记忆合金机械手驱动控制系统.对单机阶跃响应以及多机协调运行等内容进行了实验研究.实验表明,单指节响应上升时间约为0.55 s,机械手基本能够按预定轨迹运行.

关键词：内嵌式记忆合金电机机械手驱动控制系统

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新型记忆合金拟人执行器机构与参数设计

华中科技大学学报（自然科学版） 2008年第3期36卷 122-125页

作者：杨凯贺晋华辜承林华中科技大学电气与电子工程学院湖北武汉430074

室温时将多根形状记忆合金丝嵌入液态橡胶中固化成弹性棒,实现平面弯曲运动且响应快速.采用外部信号反馈方式,设计曲率传感器实现电机的精确位置控制.以结构小巧紧凑、功能完备稳定的人手为模型与目标,直接将平面弯曲型内嵌式形状记忆... 详细信息

室温时将多根形状记忆合金丝嵌入液态橡胶中固化成弹性棒,实现平面弯曲运动且响应快速.采用外部信号反馈方式,设计曲率传感器实现电机的精确位置控制.以结构小巧紧凑、功能完备稳定的人手为模型与目标,直接将平面弯曲型内嵌式形状记忆合金电机作为指节,构造拟人执行器.从仿生学角度,结合实验研究,对平面弯曲内嵌式形状记忆合金的长度、棒半径、丝半径、可回复曲率与偏心距等关键结构参数进行优化设计.由常见机械手结构型式与特点入手,提出了带手掌三指结构.最后结合可操作体积评价指标,确定了拟人执行器拇指与中指和无名指的间距.

关键词：形状记忆合金内嵌式电机平面弯曲拟人执行器优化设计

Progress in research on tumor microenvironment-based spatial omics technologies

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Oncology Research 2023年第6期31卷 877-885页

作者： FANGMEI XIE NAITE XI ZEPING HAN WENFENG LUO JIAN SheN JINGGENG LUO XINGKUI TANG TING PANG YUBING LV JIABING LIANG LIYIN LIAO HAOYU ZHANG YONG JIANG YUGUANG LI jinhua he Central Laboratory Panyu Central Hospital of GuangzhouGuangzhouChina Department of General Surgery Panyu Central Hospital of GuangzhouGuangzhouChina Administrating Office He Xian Memorial HospitalSouthern Medical UniversityGuangzhouChina

Spatial omics technology integrates the concept of space into omics research and retains the spatial information of tissues or organs while obtaining molecular *** is characterized by the ability to visualize changes in molecular information and yields intuitive and vivid visual *** omics technologies include spatial transcriptomics,spatial proteomics,spatial metabolomics,and other technologies,the most widely used of which are spatial transcriptomics and spatial *** tumor microenvironment refers to the surrounding microenvironment in which tumor cells exist,including the surrounding blood vessels,immune cells,fibroblasts,bone marrow-derived inflammatory cells,various signaling molecules,and extracellular matrix.A key issue in modern tumor biology is the application of spatial omics to the study of the tumor microenvironment,which can reveal problems that conventional research techniques cannot,potentially leading to the development of novel therapeutic agents for *** paper summarizes the progress of research on spatial transcriptomics and spatial proteomics technologies for characterizing the tumor immune microenvironment.

关键词： Spatial omics Spatial transcriptomics Spatial proteomics Tumor microenvironment

Design of robust output-feedback repetitive controller for class of linear systems with uncertainties

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Science China(Information Sciences) 2010年第5期53卷 1006-1015页

作者： WU Min 1 ? , ZHOU Lan 1 , She jinhua 2 & he Yong 1 1 School of Information Science and Engineering, Central South University, Changsha 410083, China 2 School of Computer Science, Tokyo University of Technology, Tokyo 192-0982, Japan School of Information Science and Engineering Central South University Changsha China School of Computer Science Tokyo University of Technology Tokyo Japan

Repetitive control, which adds a human-like learning capability to a control system, is widely used in many fields. This paper deals with the problem of designing a robust repetitive-control system based on output feedback for a class of plants with time-varying structured uncertainties. A continuous-discrete two-dimensional hybrid model is established that accurately describes the features of repetitive control so as to enable independent adjustment of the control and learning actions. A sufficient condition for the robust stability of the repetitivecontrol system is given in terms of a linear matrix inequality. The condition is then used to obtain the parameters of the repetitive controller. Finally, a numerical example demonstrates the effectiveness of the method.

关键词： learning output feedback repetitive control robust control linear matrix inequality

中国海外投资项目政治风险的演化:基于合法性视角的案例研究

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管理评论 2019年第6期31卷 277-288页

作者：何金花田志龙华中科技大学管理学院武汉430074

对中国海外投资项目而言,政治风险是其面临的重要挑战。本文基于合法性视角,对莱比塘铜矿项目的政治风险历程进行分析,研究发现:(1)中国海外投资项目的政治风险经历了三个阶段:利益相关方对投资项目非理性负面态度的形成、利益相关方针... 详细信息

对中国海外投资项目而言,政治风险是其面临的重要挑战。本文基于合法性视角,对莱比塘铜矿项目的政治风险历程进行分析,研究发现:(1)中国海外投资项目的政治风险经历了三个阶段:利益相关方对投资项目非理性负面态度的形成、利益相关方针对投资项目非理性政治对抗事件及行为的扩散、利益相关方针对投资项目政治对抗事件及行为的平息;(2)在海外投资项目政治风险的演化过程中,投资项目在东道国的合法性扮演了重要角色。其中,认知合法性的缺失推动了政治风险能量的积累,规制合法性、规范合法性、认知合法性危机加速了政治风险能量的释放,规制、规范、认知合法性的重构调整了政治风险能量的平稳。本研究的主要贡献在于:基于合法性视角构建了中国海外投资项目政治风险的演化过程模型,对'一带一路'背景下中国企业海外投资项目政治风险的防范和管理具有重要实践意义。

关键词：海外投资项目政治风险合法性案例研究

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尘埃辐射转移模型

天文学进展 2000年第3期18卷 249-259页

作者：何金华陈培生中国科学院云南天文台昆明650011 中国科学院国家天文观测中心

尘埃辐射转移模型对解释和探索宇宙中众多的多尘埃天体的观测现象可发挥重要的作用．目前所见到的四种球对称系统中的尘埃辐射转移方法可被总结为：二流Ｅｄｄｉｎｇｔｏｎ近似模型方法、Ｅｄｄｉｎｇｔｏｎ因子迭代模型方法、射线跟踪... 详细信息

尘埃辐射转移模型对解释和探索宇宙中众多的多尘埃天体的观测现象可发挥重要的作用．目前所见到的四种球对称系统中的尘埃辐射转移方法可被总结为：二流Ｅｄｄｉｎｇｔｏｎ近似模型方法、Ｅｄｄｉｎｇｔｏｎ因子迭代模型方法、射线跟踪法和Ｍｏｎｔｅ－Ｃａｒｌｏ模型方法。除了第一种方法外，其余方法在原理上都没有近似性。现在使用最多的是后两种方法。Ｍｏｎｔｅ－Ｃａｒｌｏ方法是其中最灵活的一种，它可被用于对非球对称系统的辐射转移模拟。辐射转移模型研究工作在球对称系统中已相当成熟，此领域的发展方向主要有：在应用中不断完善模型的细节，如尘埃种类、消光特性，介质团块性等方面；发展非球对称系统中的辐射转移模拟，包括旋转对称和任意结构系统；辐射转移模型与其它相关天体物理模型的结合应用，如与流体动力学模型、尘埃形成模型、中心星结构和演化模型等相结合，将更加合理地解释天体形成和演化过程．

关键词：尘埃辐射转移方法模型