检索结果-内蒙古大学图书馆

Suppressed concentration quenching and tunable photoluminescence in Eu^(2+)-activated Rb_(3)Y(PO_(4))_(2) phosphors for full-spectrum lighting

引用

Light(science & Applications) 2024年第11期13卷 2688-2698页

作者： Ming Zhao Yeping Ge Yurong Li Xiaoyan Song Zhiguo Xia Xinping Zhang Institute of Information Photonics Technology School of Physics and Optoelectronic EngineeringBeijing University of TechnologyBeijing 10083China College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 10083China State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied TechniquesGuangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesSchool of Physics and OptoelectronicsSouth China University of TechnologyGuangzhou 510641China

Highly efficient inorganic phosphors are desirable for lighting-emitting diode light sources,and increasing the doping concentration of activators is a common approach for enhancing the photoluminescence quantum yield(PLQY).However,the constraint of concentration quenching poses a great challenge for improving the ***,we propose a fundamental design principle by separating activators and prolonging their distance in Eu^(2+)-activated Rb_(3)Y(PO_(4))_(2)phosphors to inhibit concentration quenching,in which different quenching rates are controlled by the Eu distribution at various crystallographic *** blue-violet-emitting Rb_(3)Y(PO_(4))2:xEu(x=0.1%–15%)phosphors,with the occupation of Rb1,Rb2 and Y sites by Eu^(2+),exhibit rapid luminescence quenching with optimum external PLQY of 10%due to multi-channel energy ***,as the Eu concentration increases above 20%,Eu^(2+)prefer to occupy the Rb1 and Y sites with separated polyhedra and large interionic distances,resulting in green emission with suppressed concentration quenching,achieving an improved external PLQY of 41%.Our study provides a unique design perspective for elevating the efficiency of Eu^(2+)-activated phosphors toward high-performance inorganic luminescent materials for full-spectrum lighting.

关键词： quenching lighting concentration

来源：评论

学校读者我要写书评

暂无评论

Enhancing Delay-Sensitive Task Offloading: A Multi-agent Deep Reinforcement Learning Algorithm for MEC-Based AIoT Systems 24th

Enhancing Delay-Sensitive Task Offloading: A Multi-agent Dee...

引用

24th International Conference on Algorithms and Architectures for Parallel Processing, ICA3PP 2024

作者： Tang, Fengjie Xu, Jia Liu, Xiao Yao, Aiting Fang, Mingyan Li, Xuejun Anhui Provincial International Joint Research Center for Advanced Technology in Medical Imaging School of Computer Science and Technology Anhui University Hefei China School of Information Technology Deakin University Geelong Australia

ISBN: (纸本)9789819615414

Artificial Intelligence of Things (AIoT) systems are widely utilized in various domains such as smart logistics and smart health. In AIoT systems, computational tasks earmarked for offloading by IoT devices often have different task priorities and heterogeneous resource requirements. However, these factors will affect the QoS of the solution and the task response time. Therefore, motivated by a typical smart warehouse system, a Multi-access Edge Computing (MEC) based distributed task offloading framework is proposed. Afterward, a delay-sensitive mixed-integer programming model is defined to address the imbalanced utilization of computing resources between edge and cloud servers during the offloading process. Finally, based on the attention mechanism, a Priority-Driven Multi-Agent Deep Reinforcement Learning algorithm (PDMA-DRL) is proposed to fulfill real-time resource requirements while reducing the task response time. The PDMA-DRL algorithm consists of two agents, and each agent corresponds to a sub-problem. Comprehensive experimental results demonstrate that our proposed PDMA-DRL algorithm can outperform representative existing methods in generating delay-sensitive task offloading plans and effectively reducing the task response time. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Deep reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

The electromagnetic gyrokinetic simulations of ITG and TEM instability in finite-β tokamak plasmas 50

The electromagnetic gyrokinetic simulations of ITG and TEM i...

引用

50th EPS Conference on Plasma Physics, EPS 2024

作者： Zhang, Guodong You, Jinxiang Wang, Zihao Wang, Lu Wang, Shaojie International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology China Department of Engineering and Applied Physics University of Science and Technology of China Hefei230023 China

来源：评论

学校读者我要写书评

暂无评论

Synergistic enhancement of cathode/anode interfaces with high water-retentive organohydrogel enabling highly stable zinc ion batteries

引用

Journal of Energy Chemistry 2024年第11期98卷 670-679页

作者： Xixi Zhang Qingxiu Yu Guangmeng Qu Xiaoke Wang Chuanlin Li Chenggang Wang Na Li Jinzhao Huang Cuiping Han Hongfei Li Xijin Xu School of Physics and Technology University of JinanJinan 250022ShandongChina School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100ShandongChina Faculty of Materials Science and Engineering and Low Dimensional Energy Materials Research Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina School of System Design and Intelligent Manufacturing Southern University of Science and TechnologyShenzhen 518055GuangdongChina

Current aqueous battery electrolytes,including conve ntional hydrogel electrolytes,exhibit unsatisfactory water retention *** sustained water loss will lead to subsequent polarization and increased internal resistance,ultimately resulting in battery ***,a double network(DN) orga no hydrogel electrolyte based on dimethyl sulfoxide(DMSO)/H_(2)O binary solvent was *** directionally reconstructing hydrogen bonds and reducing active H_(2)O molecules,the water retention ability and cathode/anode interfaces were synergistic *** a result,the synthesized DN organohydrogel demonstrates exceptional water retention capabilities,retaining approximately 75% of its original weight even after the exposure to air for 20 *** Zn MnO_(2) battery delivers an outstanding specific capacity of275 mA h g^(-1) at 1 C,impressive rate performance with 85 mA h g^(-1) at 30 C,and excellent cyclic stability(95% retention after 6000 cycles at 5 C).Zn‖Zn symmetric battery can cycle more than 5000 h at 1 mA cm^(-2) and 1 mA h cm^(-2) without short *** study will encourage the further development of functional organohydrogel electrolytes for advanced energy storage devices.

关键词： Enhanced water-retentive Organohydrogel electrolyte Stable Zn||MnO+2 batteries Enhancement of cathode/anode interfaces

来源：评论

学校读者我要写书评

暂无评论

In situ formed cross-linked polymer networks as dual-functional layers for high-stable lithium metal batteries

引用

Journal of Energy Chemistry 2023年第4期79卷 253-262页

作者： Lei Shi Wanhui Wang Chunjuan Wang Yang Zhou Yuezhan Feng Tiekun Jia Fang Wang Zhiyu Min Ji Hu Zhigang Xue School of Materials Science and Engineering School of Environmental Engineering and ChemistryLuoyang Institute of Science and TechnologyLuoyang 471023HenanChina Key Laboratory for Material Chemistry of Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Key Laboratory of Advanced Materials Processing&Mold(Ministry of Education) National Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002HenanChina Henan Intelligent Manufacturing Engineering Technology Research Center for Building Profile Luoyang Institute of Science and TechnologyLuoyang 471023HenanChina Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium based Battery Luoyang Institute of Science and TechnologyLuoyang 471023HenanChina

Lithium-metal anodes(LMAs)have been recognized as the ultimate anodes for next-generation batteries with high energy density,but stringent assembly-environment conditions derived from the poor moisture stability dramatically hinder the transformation of LMAs from laboratory to ***,an in situ formed cross-linked polymer layer on LMAs is designed and constructed by a facile thiol-acrylate click chemistry reaction between poly(ethylene glycol)diacrylate(PEGDA)and the crosslinker containing multi thiol groups under UV *** to the hydrophobic nature of the layer,the treated LMAs demonstrate remarkable humid stability for more than 3 h in ambient air(70%relative humidity).The coating humid-resistant protective layer also possesses a dual-functional characterization as solid polymer electrolytes by introducing lithium bis(trifluoromethanesulfonyl)imide in the system in *** intimate contact between the polymer layer and LMAs reduces interfacial resistance in the assembled Li/LiFePO_(4)or Li/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)full cell effectively,and endows the cell with an outstanding cycle performance.

关键词： Lithium-metal anode Humid-resistant protective film Solid-state polymer electrolytes Cross-linked polymers

来源：评论

学校读者我要写书评

暂无评论

Identifying dehydration-induced shear velocity anomaly in the Earth’s core-mantle boundary

引用

The Innovation 2025年第1期6卷 47-53,46页

作者： Songsong Han Xiaoming Cui Baolong Zhang Xiaohong Li Sidao Ni Heping Sun Mingqiang Hou Qingyang Hu State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430077China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Center for High Pressure Science and Technology Advanced Research Beijing 100193China

The steep temperature gradient near the bottom of the mantle is known to generate a negative correlation between the shear wave velocity(VS)and the depth in most regions of the D00 layer,as detected by seismological ***,increasing VSwith depth is observed at the D00 layer beneath Central America,where the Farallon slab sinks,and the origin of this anomaly has not beenwell ***,we calculate the thermoelastic constants and obtain the elastic wave velocities of hydrous phase H with various Al contents and cation configurations,which may act as a water carrier to the D00 *** find its VS to be substantially lower than the post-perovskite-type *** dehydration of Al-enriched phase H and the redistribution of Al from the hydrous component to dry silicates would gradually raise the VS below the top of the D00 *** presence of 3.5 wt%water is sufficient to compensate for the thermal effects to match the seismic anomaly at the bottomof themantle beneath Central *** positive slope of VS versus depth in the D00 layer may fingerprint deep water recycling.

关键词： shear velocity calculate thermoelastic constants seismological observationshoweverincreasing Earths core mantle boundary shear wave elastic wave velocities dehydration seismic anomaly

来源：评论

学校读者我要写书评

暂无评论

Boosting hydrogen peroxide production via establishment and reconstruction of single-metal sites in covalent organic frameworks

引用

SusMat 2023年第3期3卷 379-389页

作者： Shuai Yang Lanlu Lu Ji Li Qingqing Cheng Bingbao Mei Xuewen Li Jianing Mao Panzhe Qiao Fanfei Sun Jingyuan Ma Qing Xu Zheng Jiang Shanghai Advanced Research Institute Chinese Academy of SciencesShanghaiChina School of Physical Science and Technology ShanghaiTech UniversityShanghaiChina Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghaiChina University of Chinese Academy of Sciences BeijingChina CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of ScienceShanghaiChina National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefeiChina

Covalent organic frameworks(COFs)have been well developed in electrocatalytic systems owing to their controllable skeletons,porosities,and ***,the catalytic process in COFs remains underexplored,hindering an in-depth understanding of the catalytic *** this work,uniform Pt-N_(1)O_(1)Cl_(4)sites chelated via C-N and C=O bonds along the one-dimensional and open channels of TP-TTA-COF were *** from conventional single-metal sites constructed for the near-free platinum for hydrogen evolution,the as-constructed PtCl-COF showed 2e−oxygen reduction for H_(2)O_(2)*** tracked the dynamic evolution process of atomic Pt sites in which Pt-N_(1)O_(1)Cl_(4)was transformed into Pt-N_(1)O_(1)(OH)_(2)using in situ X-ray *** theoretical calculations revealed that the strong Pt-support interaction in Pt-N_(1)O_(1)(OH)_(2)facilitated*OOH formation and thus led to higher selectivity and activity for the oxygen reduction reaction in the 2e−*** work can expand the applications of COFs through the regulation of their local electronic states for the manipulation of the metal center.

关键词： covalent organic framework oxygen reduction reaction single-atom catalysis

来源：评论

学校读者我要写书评

暂无评论

Demonstration of Magneto-optical Microdisk Resonators Based on Yttrium Iron Garnet

Demonstration of Magneto-optical Microdisk Resonators Based ...

引用

2024 Conference on Lasers and Electro-Optics/Pacific Rim, CLEO-PR 2024

作者： Yambe, T. Kitai, T. Taniguchi, K. Gao, S. Imamura, R. Kumazaki, H. Fujii, S. Iwamoto, S. Tanabe, T. Ota, Y. Department of Applied Physics and Physico-Informatics Keio University Japan Department of Electronics and Electrical Engineering Keio University Japan Department of Physics Keio University Japan Research Center for Advanced Science and Technology The University of Tokyo Japan

A microdisk resona tor ba sed on monocrysta lline yttrium iron ga rnet is reported. The 100-μm-dia meter microdisk in a 300-nm-thick ga rnet film a llows tight spa tia l confinement to enha nce ma gneto-optica l inte... 详细信息

关键词： Yttrium

来源：评论

学校读者我要写书评

暂无评论

Enhanced electrical property of graphite/Al_(2)O_(3) composite fabricated by reductive sintering of gel-casted body using cross-linked epoxy polymer

引用

Journal of advanced Ceramics 2022年第4期11卷 523-531页

作者： Yoshiaki FUNAHASHI Yunzi XIN Kunihiko KATO Huu Hien NGUYEN Takashi SHIRAI Department of Life Science and Applied Chemistry Graduate School of EngineeringNagoya Institute of TechnologyGokiso-choShowa-kuNagoyaAichi 466-8555Japan Advanced Ceramics Research Center Nagoya Institute of TechnologyGokiso-choShowa-kuNagoyaAichi 466-8555Japan

In the present study,graphite/alumina composites are fabricated via reductive sintering of gel-casted green bodies with structurally controlled cross-linked epoxy polymers for the first *** cross-linking degrees of polymers are tuned by the amount ratio of epoxy monomer/polyvinyl alcohol cross-linker utilized in gel-casting *** electrical properties with respect to 5-fold enhanced electrical conductivity and 2-fold higher carrier mobility are successfully achieved in graphite/alumina composite fabricated from cross-linked epoxy polymer,whose phenomenon is attributed to the excellent conductive path in ceramic matrix established by highly uniform network with improved graphitization degree.

关键词： ceramic composite gel-casting reductive sintering cross-linking electrical property graphitization

来源：评论

学校读者我要写书评

暂无评论

research and application of approximate rectangular section control technology in hot strip mills

引用

Journal of Iron and Steel research International 2021年第3期28卷 279-290页

作者： Hai-nan He Jian Shao Xiao-chen Wang Quan Yang Yang Liu Dong Xu You-zhao Sun National Engineering Research Center for Advanced Rolling Technology University of Science and Technology BeijingBeijing100083China

Profile requirements of silicon steel strip are extremely high and the thickness difference of cold-rolled products is usually less than 7μm,and the profile quality of hot-rolled strip is the key to ensure the thickness difference of cold-rolled *** order to produce the silicon steel strip with high-precision shape,the concept of quasi-rectangular rolling during hot continuous rolling was put forward;the equipment configuration and technical method of approximate rectangular section control were *** the roughing multi-target load distribution technology and the roll configuration technology for uniform wear of a 4-high rolling mill,the strip crown of transfer bar was reduced and the profile control stability was *** variable contact back-up roll technology on all stands in the finishing rolling process,equipped with symmetry variable taper work roll and long-stroke intelligent shifting strategy in the downstream stands,and using side rolling lubrication technology can make the roll wear more uniform,reduce the edge drop of silicon steel strip,improve the profile quality,and make the strip section of finishing exit"quasi-rectangular".In addition,induction furnace and side heater were also equipped to guarantee the temperature uniformity of the strip,so as to improve the stability of profile *** whole control technology is based on the 1580-mm hot continuous rolling production line,designed,and developed according to the characteristics of equipment and products,and has been successfully applied,which can obtain the approximate rectangular strip section satisfying the flatness quality,and improve the strip section precision of silicon steel and other products.

关键词： Approximate rectangular section Hot strip mill Transfer bar Roll contour Shifting strategy Profile control

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：