检索结果-南通市图书馆

Visible-light emission properties of α-TeO_2:Ho^(3+)/Yb^(3+)/Eu^(3+) nanoparticles via both up-and down-conversion modes

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2016年第11期34卷 1069-1076页

作者：张遥范国康胡辉陈伟龙白燕 Department of Chemistry Jinan University

In this study,α-TeO2：Ho3＋/Yb3＋,α-TeO2：Eu3＋ andα-TeO2：Ho3＋/Yb3＋/Eu3＋ nanoparticles were prepared via a simple hydrothermal process. The up- and down-conversion properties of the as-prepared nanoparticles were tested at room temperature un-der a near-infrared photo source （980 nm） and UV-vis photo source, *** results indicated thatα-TeO2 NPs were a kind of outstanding host material for both up- and down-conversion luminescence. Theα-TeO2：Ho3＋/Yb3＋nanoparticles showed sharp up-conversion emission at 545 and 660 nm under 980 nm excitation, ascribed to the5S2→5I8 and5F5→5I8（Ho3＋） transitions, and weaker down-conversion emission at 545 nm under 455 nm excitation, ascribed to the5S2→5I8（Ho3＋） transitions. Theα-TeO2：Eu3＋nanoparticles showed strong down-conversion emission at 592 and 615 nm under 395 nm excitation, attributed to the5D0→7F1 and 5D0→7F2 （Eu3＋） transitions. Possessing the advantages of these two luminescent materials, the as-prepared tri-doped samples ofα-TeO2：0.5Ho3＋/10Yb3＋/3Eu3＋（mol.%）nanoparticles could successfully emit visible light via both up- and down-conversion modes.

关键词： up-conversion down-conversion luminescence α-TeO2 nanoparticles rare earths

Transverse Emittance Reconstruction with Space Charge Effect

在线全文

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2019年第1期 291-292页

作者： Wang Wangsheng chen weilong Feng Chi 不详

Emittance is a key figure of merit for charged particle beams,and various diagnostic techniques have been developed to try to measure it *** measure the transverse emittance,a traditional emittance measurement device,... 详细信息

关键词： scanner section Emittance

Bioinspired Ultrasensitive Flexible Strain Sensors for Real‑Time Wireless Detection of Liquid Leakage

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第3期17卷 310-327页

作者： weilong Zhou Yu Du Yingying chen Congyuan Zhang Xiaowei Ning Heng Xie Ting Wu Jinlian Hu Jinping Qu Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205People’s Republic of China Department of Biomedical Engineering City University of Hong KongHong KongSAR 999077People’s Republic of China

Liquid leakage of pipeline networks not only results in considerableresource wastage but also leads to environmental pollution and ecological *** response to this global issue, a bioinspired superhydrophobic thermoplastic polyurethane/carbon nanotubes/graphene nanosheets flexible strain sensor (TCGS) hasbeen developed using a combination of micro-extrusion compression molding andsurface modification for real-time wireless detection of liquid leakage. The TCGSutilizes the synergistic effects of Archimedean spiral crack arrays and micropores,which are inspired by the remarkable sensory capabilities of scorpions. This designachieves a sensitivity of 218.13 at a strain of 2%, which is an increase of 4300%. Additionally, it demonstrates exceptional durability bywithstanding over 5000 usage cycles. The robust superhydrophobicity of the TCGS significantly enhances sensitivity and stability indetecting small-scale liquid leakage, enabling precise monitoring of liquid leakage across a wide range of sizes, velocities, and compositionswhile issuing prompt alerts. This provides critical early warnings for both industrial pipelines and potential liquid leakage scenariosin everyday life. The development and utilization of bioinspired ultrasensitive flexible strain sensors offer an innovative and effectivesolution for the early wireless detection of liquid leakage.

关键词： Thermoplastic polyurethane Bioinspired Cracks Liquid leakage Flexible strain sensor

Prospective and Practical Significance of Virtual Autopsy Laboratory

在线全文

学校读者我要写书评

暂无评论

Journal of Forensic Science and Medicine 2021年第1期7卷 28-32页

作者： Yimeng Wang Zhiming chen Gang Liu Wanan Zhu Wenxin Wang Dandan Zhou weilong chen Yanbin Gao Jun Yang Feng Huang Huimao Zhang Guangchi Yu Lijun Wang Department of Clinical Medicine Jilin UniversityChangchunChina Department of Forensic Medicine College of Basic Medical SciencesJilin UniversityChangchunChina Evidence Identification Center jIlin Province Public Security BureauChangchunChina Department of Radiology First Hospital of Jilin UniversityChangchunChina Institute for Artificial Intelligence and Clinical Innovation Neusoft Medical Systems Co.Ltd.ShenyangChina Changchun Public Security Bureau Forensic CenterChangchunChina

The virtual anatomy laboratory was jointly established by the Jilin Province Department of Public Security,Public Security Bureau of Changchun,Jilin University and Neusoft Medical Systems Co.,*** December 30,*** of the laboratory construction,virtual autopsy process,case analysis,research and development,establishment of standards,application in teaching,and other aspects of the center are summarized in this *** addition,we expound the prospective and practical significance of the virtual anatomy *** on computed tomography and magnetic resonance detection methods,the prospective applications of virtual anatomy in forensic identification are explored through the analyses of two real-life *** information from traditional anatomy as the gold standard,this study expanded on and explored the application technology and scenarios of virtual anatomy in imaging,clinical diagnosis,and equipment manufacturing,among other *** four cooperating units have their strengths and will yield valuable scientific research results and social benefits.

关键词： Computed tomography forensic magnetic resonance imaging virtual autopsy

市县统筹的城镇开发边界划定实践与思考——以赣州市为例

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

城市规划学刊 2022年第3期 57-64页

作者：谢英挺陈卫龙厦门市城市规划设计研究院有限公司

剖析当前城镇开发边界划定工作中存在的市级规划对县级规划战略引领不足、关联指标对城镇开发边界约束较大、城镇开发边界与永久基本农田协调困难、市县城镇开发边界的动态监测与修正规则缺失等实际问题及其成因，总结赣州市“三区三线... 详细信息

剖析当前城镇开发边界划定工作中存在的市级规划对县级规划战略引领不足、关联指标对城镇开发边界约束较大、城镇开发边界与永久基本农田协调困难、市县城镇开发边界的动态监测与修正规则缺失等实际问题及其成因，总结赣州市“三区三线”划定试点工作经验，介绍赣州市制定全域空间策略、合理分解市县约束指标、采用多情景比较方法建立全域监测机制的技术创新，提出“战略引领、指标约束、三线协调、统筹监测”的市县统筹工作路径，形成“图数线”对应的城镇开发边界划定方法，发挥城镇开发边界在空间治理中的综合作用，有效引导市域国土空间的保护与开发。赣州作为试点城市，其实践探索也将推动市县城镇开发边界划定与管控从“静态”转向“动态”、从“数量”转向“质量”、从“刚性”转向“弹性”，从而达到划定工作与空间治理结合的目的。

关键词：城镇开发边界划定市县统筹 “图数线”对应 “三区三线” 赣州市

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于变体GA的进攻作战抢修任务动态调度

系统工程与电子技术 2017年第3期39卷 577-583页

作者：陈伟龙陈春良史宪铭高恒装甲兵工程学院技术保障工程系北京100072 军械工程学院装备指挥与管理系河北石家庄050003 南京炮兵学院自行火炮系江苏南京211132

针对进攻作战中装备不断损伤,而抢修时间与抢修力量有限的突出矛盾,提出了"如何动态地为各抢修组优选最佳待修装备、明确不同抢修组间的任务分工和同一抢修组内的抢修序列,使得损伤装备获得尽可能多的二次作战时间"的现实军事问题。抽... 详细信息

针对进攻作战中装备不断损伤,而抢修时间与抢修力量有限的突出矛盾,提出了"如何动态地为各抢修组优选最佳待修装备、明确不同抢修组间的任务分工和同一抢修组内的抢修序列,使得损伤装备获得尽可能多的二次作战时间"的现实军事问题。抽象出进攻作战抢修任务动态调度这一新问题,构建了其数学模型,设计了变体遗传算法进行编程求解。运用Matlab软件进行了28待修装备3抢修组的调度实例求解,实例证明提出的模型科学合理,求解算法方便高效,能够动态地追踪问题最优解的变化。

关键词：进攻作战抢修任务动态调度变体遗传算法

在线全文

学校读者我要写书评

暂无评论

机场外迁:战略应对与再开发策略

城市规划学刊 2018年第S1期 102-108页

作者：陈卫龙范红轮厦门市城市规划设计研究院总规所

转型时期,机场外迁与再开发已是国内许多城市发展的普遍趋势和重大事件,国内许多城市已相继开展机场外迁工作,并进行旧机场再开发实践。机场外迁相关的研究多数聚焦在用地再开发层面,缺乏从城市发展战略层面对机场外迁进行研究。分析了... 详细信息

转型时期,机场外迁与再开发已是国内许多城市发展的普遍趋势和重大事件,国内许多城市已相继开展机场外迁工作,并进行旧机场再开发实践。机场外迁相关的研究多数聚焦在用地再开发层面,缺乏从城市发展战略层面对机场外迁进行研究。分析了机场外迁带来的调整城市空间结构和提升机场地区建成环境品质的机会,指出了机场外迁引发的单中心城市问题加剧和"产业空心化"问题。通过比较研究,分析借鉴国内外旧机场再开发经验,总结了旧机场的再开发在落实全市战略、规划策略、项目开发模式和长期谋划与研究等方面的经验。结合具体实践,以厦门高崎机场外迁为例,尝试以基于机场外迁的湖里区空间发展战略规划为例,阐述从宏观战略应变到微观用地再开发的规划思路,为即将开展机场外迁及再开发工作的城市提供借鉴。

关键词：机场外迁湖里区战略规划空间结构调整再开发

6-12 Optimization Studies of the Superconducting Linac

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2015年第1期 273-274页

作者： Tao Yue Wang Zhujun Liu Shuhui Jia Huan chen weilong Feng Chi He Yuan 不详

The research accelerators are growing in energy and power which induces an increase of the project costs(Fig. 1).The RF cavities and power supply mainly contribute the cost of the superconducting linac, which is a competitive technology for high power machine. A code with optimization algorithm is developed to optimize the beta value of SC cavity family and transition energy to increase the TTF value of the whole linac.

关键词： Superconducting Linac

规模—结构二元互动下的城市开发边界划定与管控策略研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

规划师 2020年第18期36卷 71-76页

作者：陈卫龙何子张厦门市城市规划设计研究院

文章首先通过梳理国家层面的相关文件,提出国家划定城市开发边界的目的不是为了划定空间物理边界,而是为了在强化对地方城市空间开发形态与规模管控的同时,保留地方的发展弹性;其次,基于规模—结构二元互动特征,将城市分为大增量—结构... 详细信息

文章首先通过梳理国家层面的相关文件,提出国家划定城市开发边界的目的不是为了划定空间物理边界,而是为了在强化对地方城市空间开发形态与规模管控的同时,保留地方的发展弹性;其次,基于规模—结构二元互动特征,将城市分为大增量—结构培育型城市、小增量—结构优化型城市、存量紧凑—结构提升型城市、精明收缩—结构重组型城市四种类型,并分析这四种类型城市的特征;最后,提出针对这四种类型的城市提出城市开发边界划定与管控策略。

关键词：规模—结构二元互动城市开发边界空间管控