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Hollow-structured all-silicon terahertz metasurface supporting quasi-bound states in the continuum for refractive index based Auramine O concentration sensing

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Photonics Research 2024年第7期12卷 1574-1582页

作者： XIN TANG HAODUO JIA LANBIN LI MING LI DAI WU KUI ZHOU PENG LI WEIJUN WANG JITAO LI dingyu yang College of Optoelectronic Engineering Chengdu University of Information TechnologyChengdu 610225China Institute of Applied Electronics China Academy of Engineering PhysicsMianyang 621000China School of Precision Instruments and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China Guizhou Zhenhua Fengguang Semiconductor Co. Ltd.Guiyang 550000China Chengdu Huanyuxin Technology Co. Ltd.Chengdu 610095China

Quasi-bound states in the continuum (QBIC),with exceptionally high-Q factors and the local field enhancement effect,have found potential applications in matter *** the QBIC mechanism into terahertz(THz) metasurfaces can significantly enhance the interaction between incident THz waves and matter,providing a feasible platform for the detection of biochemical ***,most experimental studies on terahertz QBIC metasurfaces utilize metallic *** contrast,research on terahertz all-dielectric QBIC metasurfaces generally remains at the simulation stage due to the high fabrication process requirements,and transitioning to the experimental stage still poses many *** this paper,a hollow-structured all-silicon metasurface supporting THz QBIC is *** resonance of THz QBIC is excited via a simple hollow structure and observed in *** and experimental results demonstrated that the designed THz QBIC metasurface can achieve sensing of Auramine ***,it is the first study,to our knowledge,to employ a metasurface to sense Auramine ***,the sensing performance maintains good stability under different humidity and temperature *** study provides new references and insights for the design and implementation of THz QBIC,and also opens a new pathway for the detection of Auramine O.

关键词： supporting continuum refractive

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CDES:数据驱动的云数据库效能评估方法

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计算机科学 2024年第6期51卷 111-117页

作者：韩宇捷徐志杰杨定裕黄波郭健美华东师范大学数据科学与工程学院上海200062 阿里巴巴集团杭州311121

在大规模云生产环境中在线评估数据库效能,对云厂商进一步优化云成本至关重要。为了评估云数据库的使用效能,提出了一种数据驱动的、基于计算与存储指标融合的云数据库效能评估方法CDES。该方法根据云数据库实例负载行为和性能画像,从... 详细信息

在大规模云生产环境中在线评估数据库效能,对云厂商进一步优化云成本至关重要。为了评估云数据库的使用效能,提出了一种数据驱动的、基于计算与存储指标融合的云数据库效能评估方法CDES。该方法根据云数据库实例负载行为和性能画像,从计算和存储两方面选取影响云数据库成本与效能的主要指标,再结合云监控平台采集的数据,评估云数据库实例与集群的线上实际使用效能。基于CDES评估结果,进一步提出了云数据库效能优化的治理方案,提供效能优化建议,引导用户减少闲置资源。CDES已被部署在某大型互联网企业生产环境中,并用于其OLTP云数据库产品的效能评价。实验结果表明,所提方法能有效评估超过5000个云数据库实例的集群的效能并引导治理,单位业务量下实例最高能节省40.74%的成本。

关键词：云计算云数据库效能评估云成本优化

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Sampling visual SLAM with a wide-angle camera for legged mobile robots

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IET Cyber-Systems and Robotics 2022年第4期4卷 356-375页

作者： Guangyu Fan Jiaxin Huang dingyu yang Lei Rao School of Electronic Information Shanghai DianJi UniversityShanghaiChina Alibaba Group HangzhouChina

Precise localisation and navigation are the two most important tasks for mobile *** simultaneous localisation and mapping(VSLAM)is useful in localisation systems of mobile *** wide-angle camera has a broad field of vision and more abundant information on images,so it is widely used in mobile robots,including legged ***,wide-angle cameras are more complicated than ordinary cameras in the design of visual localisation systems,and higher requirements and challenges are put forward for VSLAM technologies based on wide-angle *** order to resolve the problem of distortion in wide-angle images and improve the accuracy of localisation,a sampling VSLAM based on a wide-angle camera model for legged mobile robots is *** the predictability of the periodic motion of a legged robot,in the method,the images are sampled periodically,image blocks with clear texture are selected and the image details are enhanced to extract the feature points on the ***,the feature points of the blocks are extracted and by using the feature points of the blocks in the images,the feature points on the images are ***,the points on the incident light through the normalised plane are selected as the template points;the relationship between the template points and the images is established through the wide-angle camera model,and the pixel coordinates of the template points in the images and the descriptors are ***,many experiments are conducted on the TUM datasets with a quadruped *** experimental results show that the trajectory error and translation error measured by the proposed method are reduced compared with the VINS-MONO,ORB-SLAM3 and Periodic SLAM systems.

关键词： BRIEF descriptor legged mobile robots ORB-SLAM3 VSLAM wide-angle cameras

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HSCS:a hybrid shared cache scheduling scheme for multiprogrammed workloads

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Frontiers of Computer Science 2018年第6期12卷 1090-1104页

作者： Jingyu ZHANG Chentao WU dingyu yang Yuanyi CHEN Xiaodong MENG Liting XU Minyi GUO Department of Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation School of Computer and Communication EngineeringChangsha University of Science and TechnologyChangsha 410004China School of Electronics and Information Shanghai Dianji UniversityShanghai 200240China

The traditional dynamic random-access memory (DRAM) storage medium can be integrated on chips via modern emerging 3D-stacking technology to architect a DRAM shared cache in multicore systems. Compared with static random-access memory (SRAM), DRAM is larger but slower. In the existing research, a lot of work has been devoted to improving the workload performance using SRAM and stacked DRAM together in shared cache systems, ranging from SRAM structure improvement to optimizing cache tags and data access. However, little attention has been paid to designing a shared cache scheduling scheme for multiprogrammed workloads with different memory footprints in multicore systems. Motivated by this, we propose a hybrid shared cache scheduling scheme that allows a multicore system to utilize SRAM and 3D-stacked DRAM efficiently, thus achieving better workload performance. This scheduling scheme employs (1) a cache monitor, which is used to collect cache statistics; (2) a cache evaluator, which is used to evaluate the cache information during the process of programs being executed; and (3) a cache switcher, which is used to self-adaptively choose SRAM or DRAM shared cache modules. A cache data migration policy is naturally developed to guarantee that the scheduling scheme works correctly. Extensive experiments are conducted to evaluate the workload performance of our proposed scheme. The experimental results showed that our method can improve the multiprogrammed workload performance by up to 25% compared with state-of-the-art methods (including conventional and DRAM cache systems).

关键词： multicore system shared cache workload performance

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Preparation of Eco-Friendly High-Performance Manganese Dioxide Supercapacitors by Linear Sweep Voltammetry

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Journal of Renewable Materials 2023年第1期11卷 79-91页

作者： Junshan Zhao Yihan Shi Ming Zhang Liu Zhang Xumei Cui Xinghua Zhu Jitong Su Dandan Jing dingyu yang College of Optoelectronic Engineering Chengdu University of Information TechnologyChengdu610225China College of Intelligent Manufacturing Sichuan University of Arts and ScienceDazhou635000China

In this paper,the non-polluting,non-toxic,and eco-friendly material-MnO_(2)electrodes were deposited on three-dimensional porous nickel(Ni)foam by linear sweep voltammetry,and the entire electrodeposition process did not require sintering of the material,which was fast and convenient while avoiding unnecessary energy consump-tion and thus was environmentally *** electron microscopy(SEM)and transmission electron microscopy were used to examine the surface and microscopic characteristics of each sample(TEM).Chronoam-perometry(CA),cyclic voltammetry(CV),galvanostatic charge/discharge(GCD),and electrochemical impedance spectroscopy(EIS)were then used to determine the electrochemical characteristics of the manufactured *** result suggests that the MnO_(2)-sv80 electrode sample at a scan rate of 80 mV/s^(−1)has excellent performance for the supercapacitor *** specific capacitance was as high as 531.4 F g^(−1)at a current density of 1 A g^(−1)and remained at 223.2 F g^(−1)at an ultra-high current density of 20 A g^(−1),with capacitance retention of 42%.

关键词： MnO_(2) supercapacitor nanorods nanospheres high capacitance green technology

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Landau-Ginzburg A模型研究进展（英文）

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中山大学学报(自然科学版)(中英文) 2020年第1期59卷 1-8页

作者：范辉军蒋文峰 yang dingyu 北京大学数学科学学院中山大学数学学院(珠海) Humboldt-Universit?t zu Berlin

简要介绍同调镜像对称中的Landau-Ginzburg A-模型(LG-A模型)。首先简要回顾了同调镜像对称的整体图景,然后讨论了Landau-Ginzburg模型的背景以及在同调镜像对称中的应用,最后,简要介绍LG模型的Fukaya范畴的最新研究。本文尝试尽可能地... 详细信息

简要介绍同调镜像对称中的Landau-Ginzburg A-模型(LG-A模型)。首先简要回顾了同调镜像对称的整体图景,然后讨论了Landau-Ginzburg模型的背景以及在同调镜像对称中的应用,最后,简要介绍LG模型的Fukaya范畴的最新研究。本文尝试尽可能地包含数学与物理两方面的背景材料。

关键词： Fukaya范畴 Landau-Ginzburg模型

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Spin asymmetry and dipole moments inτ-pair production with ultraperipheral heavy ion collisions

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 15-21页

作者： dingyu Shao Bin Yan Shu-Run Yuan Cheng Zhang Department of Physics Center for Field Theory and Particle PhysicsFudan UniversityShanghai 200433China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Fudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics National Natural Science Foundation of China(NSFC)and Fudan UniversityShanghai 200438China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physics Peking UniversityBeijing 100871China

The anomalous magnetic(MDM)and electric(EDM)dipole moments of theτlepton serve as crucial indicators of new physics beyond the standard *** azimuthal angular asymmetry as a novel tool in ultraperipheral collisions(UPCs),we attain unparalleled precision in the study of these key *** by the highly linear polarization of coherent photons,this method uniquely enables both the MDM and EDM to contribute to the cos 2φangular distribution in similar ***,our approach substantially narrows the parameter space,excluding more than half of it compared to expected UPC-based measurements reliant solely on the total *** method not only provides improved constraints but also minimizes the need for additional theoretical assumptions,and offers a novel avenue to probe the EDM effects.

关键词： ultraperipheral collisions magnetic and electric dipole moments spin asymmetry

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体育司法何以促进立法完善——兼论《体育法(修订草案)》相关条款

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武汉体育学院学报 2022年第6期56卷 38-46页

作者：杨定玉贵州师范学院贵州民族教育研究院贵州贵阳550018 中国教育科学研究院北京100088

法律的生命在于实践,体育司法实践可以检视体育立法的不足并促进法律的修订和完善。通过对近十年217份体育司法裁判文书的实证分析发现,体育司法判例呈现数量逐年递增、涉案范围广泛、法条援引集中和法条适用不均衡等特点,在体育司法实... 详细信息

法律的生命在于实践,体育司法实践可以检视体育立法的不足并促进法律的修订和完善。通过对近十年217份体育司法裁判文书的实证分析发现,体育司法判例呈现数量逐年递增、涉案范围广泛、法条援引集中和法条适用不均衡等特点,在体育司法实践中存在仲裁与司法受案范围设置不合理,部分法律条款可操作性不强,体育组织主体权责不明晰以及纠纷解决机制不畅等问题。《中华人民共和国体育法》修订应进一步明确仲裁与司法的受案范围,科学设置体育法律内容,划清体育组织权责范围及行为边界,构建多元体育纠纷解决机制,建立服务于体育强国建设的法治保障体系。

关键词：体育法司法适用裁判文书立法完善修订草案

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Formation of ZnSe magic-size clusters displaying optical absorption doublets from prenucleation clusters

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Nano Research 2024年第7期17卷 6741-6748页

作者： dingyu Zhao Shasha Wang Jiawei Xue Chunchun Zhang Shanling Wang Xiaoqin Chen Chaoran Luan Kui Yu Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610065China Engineering Research Center in Biomaterials Sichuan UniversityChengdu 610065China Analytical&Testing Center Sichuan UniversityChengdu 610065China College of Biomedical Engineering Sichuan UniversityChengdu 610065China

The formation pathway of colloidal semiconductor ZnSe magic-size clusters(MSCs)in a reaction that display an optical absorption doublet remains poorly *** reaction of Zn(OAc)_(2)/OLA(made from zinc acetate and oleylamine)and tri-noctylphosphine selenide(SeTOP)in OLA in the presence of diphenylphosphine(HPPh_(2))is studied,in which dMSC-345 displays a doublet peaking at 328/345 *** suggest that the development is from the clusters that form in the initial prenucleation stage of the *** clusters are the precursor compound(PC-299)of MSC-299(displaying an absorption singlet peaking at 299 nm).PC-299 transforms to PC-345 at a later *** presence of alcohol(such as methanol or ethylene glycol)promotes another pathway,which is the PC-299 to PC-320 ***-320 transforms to dMSC-320(with a doublet at 305/320 nm),followed by dMSC-345 via *** present study provides additional evidence that clusters(PC-299)form and transform(such as to dMSC-345 via PC-345)in the prenucleation stage of ZnSe quantum dots(QDs).

关键词： magic-size cluster(MSC) prenucleation cluster precursor compound(PC) quantum dot(QD) zinc selenide(ZnSe)

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有机电致发光器件的研究进展

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材料导报 2007年第11期21卷 38-40,49页

作者：杨定宇蒋孟衡杨军成都信息工程学院光电技术系成都610225

有机电致发光器件(OELD)具有驱动电压低,功耗小,亮度高,响应速度快等优点,由其制作有机发光显示器件已被视为下一代最理想的显示技术。在简要介绍OELD器件结构、发光机理和制备工艺的基础上系统阐述了有机发光材料、OELD显示器件及驱动... 详细信息

有机电致发光器件(OELD)具有驱动电压低,功耗小,亮度高,响应速度快等优点,由其制作有机发光显示器件已被视为下一代最理想的显示技术。在简要介绍OELD器件结构、发光机理和制备工艺的基础上系统阐述了有机发光材料、OELD显示器件及驱动技术的研究进展,最后展望了该领域目前存在的问题及可能的解决方向。

关键词：有机电致发光器件器件结构制作工艺有机发光材料驱动技术显示面板

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