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Efficient and bright broadband electroluminescence based on environmentfriendly metal halide nanoclusters

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Light(Science & Applications) 2024年第4期13卷 727-737页

作者： Dingshuo Zhang meiyi zhu Yifan He Qingli Cao Yun Gao Hongjin Li Guochao Lu Qiaopeng Cui Yongmiao Shen Haiping He Xingliang Dai Zhizhen Ye School of Materials Science and Engineering State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University310027 HangzhouChina Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials and Engineering Research Centre of Zhejiang Province Institute of WenzhouZhejiang University325006 WenzhouChina Wenzhou XINXINTAIJING Tech.Co.Ltd. 325006 WenzhouChina Department of Chemistry Zhejiang Sci-Tech University310018 HangzhouChina

Broadband electroluminescence based on environment-friendly emitters is promising for healthy lighting yet remains an unprecedented challenge to *** copper halide-based emitters are competitive candidates for broadband emission,but their high-performance electroluminescence shows inadequate broad emission bandwidth of less than 90 ***,we demonstrate efficient ultra-broadband electroluminescence from a copper halide(CuI)nanocluster single emitter prepared by a one-step solution synthesis-deposition process,through dedicated design of ligands and subtle selection of *** CuI nanocluster exhibits high rigidity in the excitation state as well as dual-emissive modes of phosphorescence and temperature-activated delayed fluorescence,enabling the uniform cluster-composed film to show excellent stability and high photoluminescent *** consequence,ultra-broadband light-emitting diodes(LEDs)present nearly identical performance in an inert or air atmosphere without encapsulation and outstanding high-temperature operation performance,reaching an emission full width at half maximum(FWHM)of~120 nm,a peak external quantum efficiency of 13%,a record maximum luminance of~50,000 cd m^(−2),and an operating half-lifetime of 137 h at 100 cd m^(−2).The results highlight the potential of copper halide nanoclusters for next-generation healthy lighting.

关键词： halide cluster rigidity

Profile of Dr. Jiaojun zhu

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Science China(Life Sciences) 2025年第2期68卷 311-313页

作者： zhu, Jiaojun

Dr. Jiaojun zhu is the director general of Institute of Applied Ecology(IAE), Chinese Academy of Sciences(CAS)(2018 to present). He received his B.S. degree in Forest Science from Shenyang Agricultural University, China in July 1987, and subsequently joined Institute of Forestry and Soil, CAS(now known as the IAECAS) to pursue his M.S. degree in *** graduation, he served as a research assistant and an associate research fellow in the IAE-CAS from 1990 to 1996.

关键词： Forest pursue assistant

新疆石河子地区急性ST段抬高型心肌梗死患者院前救治现状及影响因素分析

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临床心血管病杂志 2020年第2期36卷 129-133页

作者：张艺珊孟晓芹朱美意新疆石河子大学医学院第一附属医院急诊科新疆石河子832000 新疆石河子大学医学院第一附属医院耳鼻喉科

目的:对新疆石河子某三甲医院胸痛中心建立后急性ST段抬高型心肌梗死(ST segment elevation myocardial infarction,STEMI)经皮冠状动脉介入(percutaneous coronary intervention,PCI)患者发病至入院的时间管理现状进行调查,并分析其影... 详细信息

目的:对新疆石河子某三甲医院胸痛中心建立后急性ST段抬高型心肌梗死(ST segment elevation myocardial infarction,STEMI)经皮冠状动脉介入(percutaneous coronary intervention,PCI)患者发病至入院的时间管理现状进行调查,并分析其影响因素,为进一步优化本地区胸痛中心院前救治流程提供理论参考。方法:选取2017-12-01-2018-11-31在石河子某三甲医院行直接PCI手术的222例患者,统计其发病至入院时间,描述院前救治的现状并分析其影响因素。结果:发病至入院时间≤3 h者110例(49.5%),>3 h者112例(50.5%)。是否呼叫120、首诊医院为PCI医院、服药史和对疾病的认知是STEMI患者院前延迟的独立影响因素。结论:本地区在缩短发病至入院时间方面尚待提高,应加强心肌梗死预防及治疗方式的宣传普及,让群众了解急救医疗服务系统,发病后及时拨打救援电话或到PCI医院就诊,可有效减少院前救治时间,提高抢救率并改善预后。

关键词： ST段抬高型急性心肌梗死院前急救胸痛中心急救医疗服务系统

Modification of Maxwell model for conductivity prediction of carbon nanotubes-filled polymer composites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue zhu Longyuan LI Ningtao zhu Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline Key Laboratory of Impact and Safety Engineering (Ningbo University) Ministry of Education School of Engineering Computing and Mathematics University of Plymouth Xi'an Zhanshi Testing & Engineering Co.Ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent years due to their outstanding electrical, thermal, and mechanical properties. The incorporation of small amounts of CNTs in polymers can substantially improve the sensitivity of the polymer's electrical conductivity. This paper presents a modified Maxwell model to evaluate the electrical conductivity of CNTs-filled polymer composites by introducing a transition zone to account for the tunneling effect. In this modified Maxwell model, the CNTs-filled polymer composite is modeled as a three-phase composite, consisting of a matrix(polymer), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical conductivity(EEC) of the composite is calculated based on the volume fractions and electrical conductivities of the matrix, inclusions, and transition zone. The model's validity is confirmed through the use of available test data, which demonstrates its capability to accurately capture the nonlinear conductivity behavior observed in CNTs-polymer composites. This study offers valuable insights into the design of high-performance conductive polymer nanocomposites, and enhances the understanding of electrical conduction mechanisms in CNT-dispersed polymer composites.

关键词： carbon nanotube (CNT) composite electrical conductivity Maxwell model O242.2 O441.1 polymer tunneling

ST段抬高型心肌梗死患者介入治疗时间管理现状及影响因素

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护理学杂志 2020年第4期35卷 1-4页

作者：张艺珊孟晓芹朱美意石河子大学医学院第一附属医院急诊科新疆石河子832000 石河子大学医学院第一附属医院耳鼻喉科新疆石河子832000

目的了解急性ST段抬高型心肌梗死患者在经皮冠状动脉介入(PCI)诊治过程中入门-球囊扩张(D2B)的时间管理现状,并分析其相关影响因素,为进一步优化胸痛中心救治流程提供参考。方法选取2017年12月1日至2018年11月31日急诊就诊并行PCI治疗的... 详细信息

目的了解急性ST段抬高型心肌梗死患者在经皮冠状动脉介入(PCI)诊治过程中入门-球囊扩张(D2B)的时间管理现状,并分析其相关影响因素,为进一步优化胸痛中心救治流程提供参考。方法选取2017年12月1日至2018年11月31日急诊就诊并行PCI治疗的222例患者,将D2B时间分成5个时间段(进医院大门-首份心电图、抽血-现场快速检验出结果、通知重要相关科室会诊-会诊医生到达、医患沟通-签署知情同意书、送入介入室-球囊扩张时间),统计每一时间段的时间分布情况,并分析其影响因素。结果患者D2B时间为76(64,89)min,83.3%患者D2B时间符合中国胸痛中心认证标准。多元线性回归分析显示,年龄、非PCI医院转入、支付费用能力和对疾病的认知是影响D2B时间的主要因素(P<0.05,P<0.01)。结论ST段抬高型心肌梗死患者D2B中位时间符合胸痛中心标准,接诊时需关注年龄大、支付费用能力低、对疾病认知不足的患者,并进一步简化流程,加强非PCI医院与PCI医院间的合作与联系,以切实缩短D2B时间。

关键词：胸痛中心急性心肌梗死入门-球囊扩张时间经皮冠状动脉介入心肌缺血急诊急救疾病认知

New insight into the origin and evolution of the flora and fauna of Hainan Island,China

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Science China Earth Sciences 2025年第1期68卷 52-61页

作者： Hua zhu Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesYunnan International Joint Laboratory of Southeast Asia Biodiversity ConservationYunnan Key Laboratory for the Conservation of Tropical Rainforests and Asian ElephantsMengla666303China

The origin of the biota of Hainan Island,China,remains a fundamental scientific *** studies on the biota,geological tectonics,and paleomagnetism proposed that during the Eocene,Hainan Island connected Vietnam and Guangxi,and then moved to the southeast to reach its present *** review mainly discusses its biota origin from molecular phylogeny and palaeobotanical *** formation and evolution of the biological groups of Hainan Island were identified via research on their genomes,phylogeny,and molecular *** research showed that the genera and species that appeared and diverged early in their evolution(i.e.,before the Miocene)can be explained by the land connection between Hainan Island,Vietnam,and Guangxi during the *** to Southeast Asian tectonic theory,in the Middle Miocene(at about 15 million years ago),Hainan Island had moved to its present *** population and genetic divergence of species with late divergence times(after 15 Ma)can be reasonably explained by the close proximity(or land connection)between Hainan Island and the Leizhou Peninsula,enabling genetic communication between Hainan Island and the Chinese mainland,but have exceptional *** have been obtained through palaeobotanical studies,showing that in the Eocene-Oligocene period,southwest China and Hainan Island had subtropical vegetation and ***,the fossil group in southeast China(in Maoming,near present-day Hainan Island)in the Late Eocene indicated a tropical rainforest vegetation and *** suggests that in the Paleogene,Hainan Island may have been located near or on the southwest border of Guangxi and northern Vietnam,rather than in its present *** floristic division of the flora of Hainan Island basically presents a northeast-southwest inclined distribution *** pattern can be explained by the counterclockwise rotation of Hainan Island during its movement to the southeast as prop

关键词： Molecular phylogeny Biogeography Paleobotany Origin of flora and fauna Hainan Island of China

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车联网中视频语义驱动的资源分配算法

通信学报 2021年第7期42卷 1-11页

作者：陈九九冯春燕郭彩丽杨洋孙启政朱美逸北京邮电大学北京先进信息网络实验室北京100876

针对车联网中视频语义理解等智能计算业务需求下传统资源分配方式不再适用的问题,研究了视频语义驱动的资源分配算法。首先,以目标检测任务为例,提出视频语义驱动的资源分配指导模型并给出模型参数的求解算法;其次,构建了车联网场景中... 详细信息

针对车联网中视频语义理解等智能计算业务需求下传统资源分配方式不再适用的问题,研究了视频语义驱动的资源分配算法。首先,以目标检测任务为例,提出视频语义驱动的资源分配指导模型并给出模型参数的求解算法;其次,构建了车联网场景中视频语义驱动的资源分配优化问题,将该问题转化成凸问题并利用凸优化算法求解;进一步,为降低凸优化算法的复杂度,提出了基于强化Q学习的资源分配算法;最后,仿真验证了所提资源分配算法的性能优势。

关键词：资源分配车联网视频语义目标检测强化学习

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面向智能任务的语义通信:理论、技术和挑战

通信学报 2022年第6期43卷 41-57页

作者：刘传宏郭彩丽杨洋陈九九朱美逸孙鲁楠北京邮电大学先进信息网络北京实验室北京100876 北京邮电大学网络体系构建与融合北京市重点实验室北京100876

未来机-机、人-机万物智能互联对传统通信方式提出了挑战,提取信源语义信息进行传输的语义通信方法为6G提供了新的解决方法。首先,综述了语义通信的发展历程和研究现状,分析了语义通信目前面临的两大瓶颈问题,提出了面向智能任务的语义... 详细信息

未来机-机、人-机万物智能互联对传统通信方式提出了挑战,提取信源语义信息进行传输的语义通信方法为6G提供了新的解决方法。首先,综述了语义通信的发展历程和研究现状,分析了语义通信目前面临的两大瓶颈问题,提出了面向智能任务的语义通信架构,给出了面向智能任务的语义信息熵和语义信道容量的度量方法;其次,针对不同的智能任务,分别提出了语义编码和语义联合信源信道编码方案;再次,搭建了语义通信平台,对所提方法进行实验验证;最后,对语义通信未来的挑战和开放性问题进行了总结。语义通信方法相较于传统通信方法可以大大降低传输数据量和传输时延,将在未来万物智联的通信中发挥重要作用。

关键词： 6G 语义熵语义通信语义编码智能任务

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基于欧拉运动放大的微小振动测量技术综述

电子测量技术 2023年第11期46卷 90-98页

作者：朱美意陈日东郑德智北京航空航天大学仪器科学与光电工程学院北京100191 北京航空航天大学前沿科学技术创新研究院北京100191

在工程振动测量领域,近年基于机器视觉的振动测量方法是最常用的技术手段。针对微小幅度振动测量问题,依赖于传统图像处理算法的视觉测量方法难以测准测精,对此,基于机器视觉的运动放大方法是很好的解决方案。这种方法将人眼难以察觉的... 详细信息

在工程振动测量领域,近年基于机器视觉的振动测量方法是最常用的技术手段。针对微小幅度振动测量问题,依赖于传统图像处理算法的视觉测量方法难以测准测精,对此,基于机器视觉的运动放大方法是很好的解决方案。这种方法将人眼难以察觉的微小运动进行放大,再结合图像运动信息提取方法,实现了更准确的运动信息测量。本文总结了目前常用的基于机器视觉的振动测量方法,重点围绕基于机器视觉的运动放大技术展开详细介绍。运动放大技术主要分为拉格朗日放大方法及欧拉放大方法,本文介绍了拉格朗日放大技术和欧拉放大技术方法的起源发展,对两类方法的核心进行了对比分析,阐述了欧拉运动放大技术的优越性,进一步详细介绍了多种欧拉放大技术的改进方法,分析了各类改进方法的特点和局限性。最后,总结了基于欧拉运动放大的微小振动测量技术的发展前景。

关键词：机器视觉振动测量运动放大拉格朗日放大欧拉放大