检索结果-内蒙古大学图书馆

arXiv 2022年

作者： Zhang, Xinyan Chen, Jialin Chen, Ruoxi Wang, Chan Cai, Tong Chen, Hongsheng Lin, Xiao Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou310027 China International Joint Innovation Center Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang The Electromagnetics Academy Zhejiang University Zhejiang University Haining314400 China Department of Electrical and Computer Engineering Technion-Israel Institute of Technology Haifa32000 Israel Air and Missile Defense College Air Force Engineering University Xi’an710051 China

The judicious design of electromagnetic boundary provides a crucial route to control light-matter interactions, and it is thus fundamental to basic science and practical applications. General design approaches rely on the manipulation of bulk properties of superstrate or substrate and on the modification of boundary geometries. Due to the recent advent of metasurfaces and low-dimensional materials, the boundary can be flexibly featured with a surface conductivity, which can be rather complex but provide an extra degree of freedom to regulate the propagation of light. In this perspective, we denote the boundary with a non-zero surface conductivity as the meta-boundary. The meta-boundaries are categorized into four types, namely isotropic, anisotropic, biisotropic and bianisotropic meta-boundaries, according to the electromagnetic boundary conditions. Accordingly, the latest development for these four kinds of meta-boundaries are reviewed. Finally, an outlook on the research tendency of meta-boundaries is provided, particularly on the manipulation of light-matter interactions by simultaneously exploiting meta-boundaries and metamaterials. © 2022, CC BY.

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

Rotation-induced significant modulation of near-field radiative heat transfer between hyperbolic nanoparticles

arXiv

引用

arXiv 2021年

作者： Hu, Yang Sun, Yasong Zheng, Zhiheng Song, Jinlin Shi, Kezhang Wu, Xiaohu Basic Research Center School of Power and Energy Northwestern Polytechnical University Shaanxi Xi’an710064 China Center of Computational Physics and Energy Science Yangtze River Delta Research Institute of NPU Northwestern Polytechnical University Jiangsu Taicang215400 China Shandong Institute of Advanced Technology Shandong Jinan250100 China School of Energy and Materials Shanghai Polytechnic University Shanghai201209 China School of Electrical and Information Engineering Wuhan Institute of Technology Hubei Wuhan430025 China Centre for Optical and Electromagnetic Research State Key Laboratory of Modern Optical Instrumentation Zhejiang University Hangzhou310058 China Shanghai201209 China

Modulation of near-field radiative heat transfer (NFRHT) with rotated anisotropic hBN and α-MoO3 nanoparticles (NPs) are investigated. The spectral heat power, total heat power and electric field energy density are calculated at different particle orientations. Numerical results show that the modulation factor of the α-MoO3 NPs could be up to ~12000 with particle radius of 40 nm at a gap distance of 200 nm, which is ~ 10-fold larger than the state of the art. Excitation of localized hyperbolic phonon polaritons (LHPPs) in different particle orientations allow for the excellent modulation. The modulation factor of the hBN NPs is 5.9 due to the insensitivity of the LHPPs in the type II hyperbolic band to the particle orientations. This work not only provides a new method to modulate NFRHT in particle systems, but also paves the way to explore radiative heat transfer characteristics of anisotropic media. Copyright © 2021, The Authors. All rights reserved.

关键词： Radiative transfer

来源：评论

学校读者我要写书评

暂无评论

P-70: Multilayer Silicon and Silicon Oxide Subwavelength Grating as a Reflective Polarizer in Visible Region

引用

SID Symposium Digest of Technical Papers 2014年第1期45卷

作者： Su Pan Hoi-Sing Kwok State Key Lab on Advanced Displays and Optoelectronics Department of Electronic and Computer Engineering Hong Kong University of Science & Technology Clear Water Bay Kowloon Hong Kong

We proposed a novel visible polarizer based on multilayer silicon and silicon oxide alternative subwavelength grating and its optical characteristic is numerically investigated by finite difference time domain method. The reflectance of TE mode and transmission of TM mode are above 90% with extinction ratio up to 10 3 . Moreover, the proposed polarizer also has wide angular field and large fabrication tolerance.

关键词： polarizer subwavelength grating FDTD

来源：评论

学校读者我要写书评

暂无评论

A one-shot projection method for interconnects with process variations

A one-shot projection method for interconnects with process ...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Jun Tao Xuan Zeng Fan Yang Yangfeng Su Lihong Feng Wei Cai Dian Zhou C. Chiang ASIC & System State Key Lab. Fudan University Shanghai P.R. China Mathematics Dept. Fudan University Shanghai P.R. China Department of Mathematics University of North Carolina at Charlotte Charlotte NC USA Electrical Engineering Dept. University of Texas at Dallas Richardson TX USA Advanced Technology Group Synopsys Inc. Mountain View CA USA

With the development of IC technology, it becomes urgent to investigate model reduction method for interconnects with process variations. In this paper, a one-shot projection algorithm (OPM) is proposed to generate a projection matrix that is independent of statistically varying parameters. As a result, construction of the reduced system can be decoupled with the Monte Carlo analysis in either frequency domain or time domain. Therefore, without loss of accuracy, OPM can obtain a reduced system in much less CPU time compared with the previous perturbation scheme. Numerical results have demonstrated the advantages of the proposed OPM

关键词： Integrated circuit interconnections Monte Carlo methods Frequency domain analysis Stochastic processes Large-scale systems Time domain analysis Sampling methods Delay Transfer functions Application specific integrated circuits

来源：评论

学校读者我要写书评

暂无评论

P-120: Nucleation-control Bistable Twist Nematic Display

引用

SID Symposium Digest of Technical Papers 2014年第1期45卷

作者： Man-Chun Tseng Chung-Yung Lee Tsz-Kin Ho Hoi-Sing Kwok State Key Lab on Advanced Displays and Optoelectronics Department of Electrical and Electronic Engineering Hong Kong University of Science Technology Clear Water Bay Kowloon Hong Kong

A fast π bistable twist nematic (π-BTN) liquid crystal display controlled by nucleation process is developed. The nucleation induced by the patterned spacer inside the cell. The response time is fast and it depends ...

关键词：

来源：评论

学校读者我要写书评

暂无评论

Ambient Chemical Fixation of CO2 Using a Robust Ag27 Cluster-Based Two-Dimensional Metal–Organic Framework

引用

Angewandte Chemie 2020年第45期132卷

作者： Zhao M. Huang S. Fu Q. Li W. Guo R. Yao Q. Wang F. Cui P. Tung C.-H. Sun D. School of Chemistry and Chemical Engineering Key Lab of Colloid and Interface Chemistry of Ministry of Education State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China School of Physics Shandong University Jinan 250100 China School of Chemistry and Chemical Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology Liaocheng University Liaocheng 252000 China School of Materials Science and Engineering Shandong University Jinan 250061 China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University Tianjin 300071 China College of Chemistry Chemical Engineering and Materials Science Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals Shandong Normal University Jinan 250014 China

Unprecedented double S2− templated Ag27 clusters have been stabilized by 5,10,15,20-tetra(4-pyridyl)porphyrin (TPyP-H2) ligands to afford a robust 2D metal–organic framework (Ag27-MOF). This silver cluster-assembled material serves as a highly efficient heterogeneous catalyst for the cyclization of both terminal and internal propargylamines with CO2 under atmospheric pressure. Density functional theory (DFT) calculations illustrate that the high catalytic activity and broad substrate scope are attributable to the saddle-shaped metallic node in Ag27-MOF, which features an accessible platform with high-density silver atoms as π-Lewis acid sites for activating C≡C triple bonds. As a result, different sterically hindered alkyne substrates can be effectively activated through π-interactions with these cationic silver centers. © 2020 Wiley-VCH GmbH

关键词： 2D metal–organic frameworks CO2 fixation heterogeneous catalysis silver cluster-assembled materials

来源：评论

学校读者我要写书评

暂无评论

Adsorption Site Regulation to Guide Atomic Design of Ni–Ga Catalysts for Acetylene Semi-Hydrogenation

引用

advanced Materials 2020年第28期132卷 11744-11749页

作者： Cao, Yueqiang Zhang, Hao Ji, Shufang Sui, Zhijun Jiang, Zheng Wang, Dingsheng Zaera, Francisco Zhou, Xinggui Duan, Xuezhi Li, Yadong State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Shanghai200237 China Shanghai Institute of Applied Physics Chinese Academy of Science Shanghai201800 China Department of Chemistry Tsinghua University Beijing100084 China Department of Chemistry and UCR Center for Catalysis University of California RiversideCA92521 United States University of Chinese Academy of Sciences Beijing100049 China Shanghai Synchrotron Radiation Facility Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Science Shanghai201210 China

Atomic regulation of metal catalysts has emerged as an intriguing yet challenging strategy to boost product selectivity. Here, we report a density functional theory-guided atomic design strategy for the fabrication of a NiGa intermetallic catalyst with completely isolated Ni sites to optimize acetylene semi-hydrogenation processes. Such Ni sites show not only preferential acetylene π-adsorption, but also enhanced ethylene desorption. The characteristics of the Ni sites are confirmed by multiple characterization techniques, including aberration-corrected high-resolution scanning transmission electron microscopy and X-ray absorption spectrometry measurements. The superior performance is also confirmed experimentally against a Ni5Ga3 intermetallic catalyst with partially isolated Ni sites and against a Ni catalyst with multi-atomic ensemble Ni sites. Accordingly, the NiGa intermetallic catalyst with the completely isolated Ni sites shows significantly enhanced selectivity to ethylene and suppressed coke formation. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Hydrogenation

来源：评论

学校读者我要写书评

暂无评论

MIPI 2022 Challenge on Under-Display Camera Image Restoration: Methods and Results 17th

MIPI 2022 Challenge on Under-Display Camera Image Restorati...

引用

17th European Conference on Computer Vision, ECCV 2022

作者： Feng, Ruicheng Li, Chongyi Zhou, Shangchen Sun, Wenxiu Zhu, Qingpeng Jiang, Jun Yang, Qingyu Loy, Chen Change Gu, Jinwei Zhu, Yurui Wang, Xi Fu, Xueyang Hu, Xiaowei Hu, Jinfan Liu, Xina Chen, Xiangyu Dong, Chao Zhang, Dafeng Huang, Feiyu Liu, Shizhuo Wang, Xiaobing Jin, Zhezhu Jiang, Xuhao Shao, Guangqi Wang, Xiaotao Lei, Lei Zhang, Zhao Zhao, Suiyi Zheng, Huan Gao, Yangcheng Wei, Yanyan Ren, Jiahuan Huang, Tao Fang, Zhenxuan Huang, Mengluan Xu, Junwei Zhang, Yong Yang, Yuechi Shu, Qidi Yang, Zhiwen Li, Shaocong Yao, Mingde Xu, Ruikang Guan, Yuanshen Huang, Jie Xiong, Zhiwei Zhu, Hangyan Liu, Ming Liu, Shaohui Zuo, Wangmeng Jia, Zhuang Song, Binbin Song, Ziqi Mao, Guiting Hou, Ben Liu, Zhimou Ke, Yi Ouyang, Dengpei Han, Dekui Zhang, Jinghao Zhu, Qi Zheng, Naishan Zhao, Feng Jin, Wu Conde, Marcos Nathan, Sabari Timofte, Radu Xu, Tianyi Xu, Jun Hrishikesh, P.S. Puthussery, Densen Jiji, C.V. Jiang, Biao Ding, Yuhan Li, WanZhang Feng, Xiaoyue Chen, Sijing Zhong, Tianheng Lu, Jiyang Chen, Hongming Fan, Zhentao Chen, Xiang Nanyang Technological University Singapore Singapore SenseBrain San Jose United States Shanghai AI Laboratory Shanghai China SenseTime Research and Tetras.AI Beijing China University of Science and Technology of China Hefei China Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Samsung Research China Beijing China Xiaomi Beijing China Hefei University of Technology Hefei China School of Artificial Intelligence Xidian University Xi’an China School of Remote Sensing and Information Engineering Wuhan University Wuhan China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan China Harbin Institute of Technology Harbin China University of Macau China Changsha Research Institute of Mining and Metallurgy Changsha China Tianjin University Tianjin China Computer Vision Lab University of Wurzburg Würzburg Germany Couger Inc. Tokyo Japan School of Statistics and Data Science Nankai University Tianjin China Founding Minds Software Thiruvananthapuram India Department of Electronics and Communication SRM University AP Amaravati India Fudan University Shanghai China Shenyang Aerospace University Shenyang China Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9783031250712

Developing and integrating advanced image sensors with novel algorithms in camera systems is prevalent with the increasing demand for computational photography and imaging on mobile platforms. However, the lack of high-quality data for research and the rare opportunity for in-depth exchange of views from industry and academia constrain the development of mobile intelligent photography and imaging (MIPI). To bridge the gap, we introduce the first MIPI challenge including five tracks focusing on novel image sensors and imaging algorithms. In this paper, we summarize and review the Under-Display Camera (UDC) Image Restoration track on MIPI 2022. In total, 167 participants were successfully registered, and 19 teams submitted results in the final testing phase. The developed solutions in this challenge achieved state-of-the-art performance on Under-Display Camera Image Restoration. A detailed description of all models developed in this challenge is provided in this paper. More details of this challenge and the link to the dataset can be found at https://***/mipi-challenge/MIPI2022. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Image reconstruction

来源：评论

学校读者我要写书评

暂无评论

Nonequilibrium Effects on Rapid Directional Solidification Microstructures During Additive Manufacturing: A Quantitative Phase Field Study

SSRN

引用

SSRN 2024年

作者： Li, Leiji Xiao, Fei Li, Zhu He, Shiyu Liu, Yang Cai, Xiaorong Hou, Ruihang Zhou, Ying Zuo, Shungui Zhang, Chongfeng Gao, Jinzhong Shen, Xiaopeng Zhu, Tianchi Gu, Yijia Jin, Xuejun State Key Lab of Metal Matrix Composite School of Materials Science and Engineering Shanghai Jiao Tong University 800 Dong Chuan Road Shanghai200240 China Institute of Medical Robotics Shanghai Jiao Tong University Shanghai200240 China National Key Laboratory of Aerospace Mechanism Aerospace System Engineering Shanghai 3805 Jin Du Road Shanghai201108 China Department of Materials Science and Engineering Missouri University of Science and Technology RollaMO65409 United States National Engineering Research Center of Advanced Magnetic Resonance Technologies for Diagnosis and Therapy School of Materials Science and Engineering Shanghai Jiao Tong University 800 Dong Chuan Road Shanghai200240 China Department of Materials Science and Engineering Graduate School of Engineering Osaka University 2-1 Yamada-oka Osaka Suita565-0871 Japan Shanghai Key Laboratory of Materials Laser Processing and Modification China

Fusion-based metal additive manufacturing (AM) is a technology that builds objects layer by layer, with rapid solidification referring to the quick transition of material from liquid to solid. During this process, solute trapping, a nonequilibrium effect characterized by velocity-dependent partition coefficient, significantly influences microstructure kinetics, morphology, and phase formation. This study utilizes the latest quantitative phase field (PF) model to systematically investigate the solute trapping, solute drag, and their effects on pattern formation during rapid solidification at velocities relevant to AM, in both one and two dimensions. Under different temperature gradients and pulling velocities, we observed that the growth mode transits from planar to cellular to dendritic, then back to cellular, and finally to planar, which is consistent with classic solidification theory. A solidification microstructure selection map is constructed based on PF simulations. Furthermore, we compared primary dendritic/cell spacing calculated by the PF model with theoretical models. The simulated morphologies and arm spacing showed good agreement with experimental observations for Al-4Si and Ti-20Nb alloys during rapid solidification. These results demonstrate the potential of the PF model for predicting and controlling microstructure formation under rapid solidification conditions in the melt pool of AM processes. © 2024, The Authors. All rights reserved.

关键词： Morphology

来源：评论

学校读者我要写书评

暂无评论

Two-dimensional topological platinum telluride superstructures with periodic tellurium vacancies

arXiv

引用

arXiv 2023年

作者： Xu, Xin Wang, Xuechun Yu, Shuming Wang, Chenhui Liu, Guowei Li, Hao Yang, Jiangang Li, Jing Sun, Tao Hai, Xiao Li, Lei Liu, Xue Zhang, Ying Zhang, Weifeng Zhang, Quan Wang, Kedong Xu, Nan Ma, Yaping Ming, Fangfei Cui, Ping Lu, Jiong Zhang, Zhenyu Xiao, Xudong State Key Lab of Optoelectronic Materials and Technologies Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information Technology Sun Yat-sen University Guangzhou510275 China School of Physical Science and Technology Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education Wuhan University Wuhan430072 China School of Future Technology Henan Key Laboratory of Quantum Materials and Quantum Energy Henan University Zhengzhou450046 China University of Science and Technology of China Hefei230026 China Institute for Advanced Studies Wuhan University Wuhan430072 China Department of Physics Southern University of Science and Technology Shenzhen518055 China Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beihang University Beijing100191 China School of Chemical Engineering Xi'an Key Laboratory of Special Energy Materials Northwest University Xi’an710069 China Department of Chemistry National University of Singapore Singapore117543 Singapore Core Facility of Wuhan University Wuhan430072 China Anhui Key Laboratory of Magnetic Functional Materials and Devices Institute of Physical Science and Information Technology Anhui University Anhui Hefei230601 China Institute of Quantum Materials and Physics Henan Academy of Sciences Zhengzhou450046 China College of Chemistry and Chemical Engineering Hubei Normal University Huangshi435002 China

Defect engineering in the inherently inert basal planes of transition metal dichalcogenides (TMDs), involving the introduction of chalcogen vacancies, represents a pivotal approach to enhance catalytic activity by exposing high-density catalytic metal single-atom sites. However, achieving a single-atom limit spacing between chalcogen vacancies to form ordered superstructures remains challenging for creating uniformly distributed high-density metal single-atom sites on TMDs comparable to carbon-supported single-atom catalysts (SACs). Here we unveil an efficient TMD-based topological catalyst for hydrogen evolution reaction (HER), featuring high-density single-atom reactive centers on a few-layer (7×7)-PtTe2-x superstructure. Compared with pristine Pt(111), PtTe2, and (2×2)-PtTe2-x, (7×7)-PtTe2-x exhibits superior HER performance owing to its substantially increased density of undercoordinated Pt sites, alongside exceptional catalytic stability when operating at high current densities. First-principles calculations confirm that multiple types of undercoordinated Pt sites on (7×7)-PtTe2-x exhibit favorable hydrogen adsorption Gibbs free energies, and remain active upon increasing hydrogen coverage. Furthermore, (7×7)-PtTe2-x possesses nontrivial band topologies with robust edge states, suggesting potential enhancements for HER. Our findings open up a new avenue for the development of TMD-based catalysts and exciting prospects for the exploration of topological materials in catalysis and beyond. © 2023, CC BY.

关键词： Topology

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：