检索结果-南通市图书馆

Metal−Organic Framework-Based Ultrafast Logic Gates for High-Security Optical Encryption

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Ultrafast Science 2023年第4期3卷 35-42页

作者： Junhong Yu Yadong Han Longyu wang Yibing Liu Hang Zhang Xuan Chen Xuezhi Liu Zhengbang wang Jianbo Hu Laboratory for Shock Wave and Detonation physics Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900China State Key Laboratory for Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China. Key Laboratory for the Green Preparation and Application of Functional Materials Ministry of Education Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China

Optical logic gates call for materials with giant optical nonlinearity to break the current performance ***–organic frameworks(MOFs)provide an intriguing route to achieve superior optical nonlinearity benefitting from structural diversity and design ***,the potential of MOFs for optoelectronics has been largely overlooked and their applications in optical logic have not been ***,through temporally manipulating the nonlinear optical absorption process in porphyrin-based MOFs,we have successfully developed AND and XOR logic gates with an ultrafast speed approaching 1 THz and an on–off ratio above 90%.On this basis,all-optical information encryption is further demonstrated using transmittance as primary codes,which shows vast prospects in avoiding the disclosure of security *** the best of our knowledge,this is the first exploration of MOFs for applications in ultrafast optical logic devices and information encryption.

关键词： Metal-organic framework Ultrafast Logic gate Optical Encryption Nonlinear optics Carrier dynamics

Recent Progress of Microgravity Science Research in china

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

空间科学学报 2022年第4期42卷 772-785页

作者： ZHAO Jianfu DU wangfang KANG Qi LAN Ding LI Kai LI Weibin LIU Y C LUO Xinghong MIAO Jianyin wang Qinggong wang Shuangfeng ZHANG Tao ZHANG Xingwang ZHANG Yonghai ZHENG Huiqiong CAS Key Laboratory of Microgravity Institute of MechanicsChinese Academy of SciencesBeijing 100190 School of engineering Science University of Chinese Academy of SciencesBeijing 100049 Center for Combustion Energy Tsinghua UniversityBeijing 100084 institute of Metal Research Chinese Academy of SciencesShenyang 110016 institute of Spacecraft System engineering China Academy of Space TechnologyBeijing 100094 Qian Xuesen Laboratory of Space Technology China Academy of Space TechnologyBeijing 100094 Shanghai institute of Technical physics Chinese Academy of SciencesShanghai 200083 institute of Semiconductors Chinese Academy of SciencesBeijing 100083 School of Chemical engineering and Technology Xi’an Jiaotong UniversityXi’an 710049 Center for Excellence in Molecular Plant Sciences Chinese Academy of SciencesShanghai 200032

Microgravity science is an important branch of space *** major objective is to study the laws of materials movement in microgravity,as well as to reveal the influence of gravity on the movement of materials in different gravity *** researches relevant to these basic studies are also important contents of microgravity *** advanced subjects,to some extent,reflect the ability of human beings to understand nature and the R&D level in this field in various *** this paper,the recent progress and the latest achievements of microgravity science and application researches in china aboard space platforms such as the Core Capsule Tianhe of the china Space Station(CSS)and satellites,as well as utilizing ground-based short-term microgravity facilities such as the Drop Tower Beijing and TUFF,are summarized,which cover the following sub-disciplines:microgravity fluid physics,microgravity combustion science,space materials science,space fundamental physics,space bio-technology,and relevant space technology applications.

关键词： Microgravity science china Space Station(CSS) Ground-based short-term microgravity platforms Microgravity fluid physics Microgravity combustion science Space materials science Space fundamental physics Space bio-technology

Controllable vortex lasing arrays in a geometrically frustrated exciton-polariton lattice at room temperature

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第1期10卷 196-204页

作者： Jun wang Yutian Peng Huawen Xu Jiangang Feng Yuqing Huang Jinqi Wu Timothy C.H.Liew Qihua Xiong Division of physics and Applied physics School of Physical and Mathematical Sciences Nanyang Technological University Department of Optical Science and engineering and Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Fudan University State Key Laboratory of Low-Dimensional Quantum physics and Department of physics Tsinghua University Beijing academy of Quantum Information Sciences

Quantized vortices appearing in topological excitations of quantum phase transition play a pivotal role in strongly correlated physics involving the underlying confluence of superfluids,Bose-Einstein condensates and *** polaritons as bosonic quasiparticles have enabled studies of non-e quilibrium quantum gases and ***-polariton condensates in artificial lattices intuitively emulate energy-band structures and quantum many-body effects of condensed matter,underpinning constructing vortex lattices and controlling quantum fluidic ***,we harness exciton-polariton quantum fluids of light in a frustrated kagome lattice based on robust metal-halide perovskite microcavities,to demonstrate vortex lasing arrays and modulate their configurations at room *** energy-momentum spectra unambiguously reveal massless Dirac bands and quenched kinetic-energy flat bands coexisting in kagome lattices,where polariton condensates exhibit prototypical honeycomb and kagome spatial *** coherence investigations illustrate two types of phase textures of polariton condensates carrying ordered quantized-vortex arrays and π-phase shifts,which could be selected when needed using lasing emission *** findings offer a promising platform on which it is possible to study quantum-fluid correlations in complex polaritonic lattices and highlight feasible applications of structured light.

关键词： vortex lasing exciton–polariton lattice Bose–Einstein condensation the orbital angular momentum of light geometric frustration perovskite semiconductor

Microfluidic magnetic detection system combined with a DNA framework-mediated immune-sandwich assay for rapid and sensitive detection of tumor-derived exosomes

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2023年第6期9卷 195-204页

作者： Qiuling Qian Yutong Wei Yi Xu Mengmeng Zheng Chenguang wang Shulin Zhang Xiaoming Xie Chaofeng Ye Xianqiang Mi National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and information TechnologyChinese Academy of Sciences865 Changning RoadShanghai 200050China Shanghai Advanced Research institute Chinese Academy of SciencesShanghai 201210China University of Chinese academy of Sciences Bejing 100049China school of Information Science and Technology Shanghai Tech UniversityShanghai 201210China School of Life Sciences Shanghai UniversityShanghai 20044China School of physics and Optoelectronic engineering Hangzhou institute for Advanced Study University of Chinese Academy of SciencesChinese Academy of SciencesHangzhou 310024China

Tumor-derived circulating exosomes(TDEs)are being pursued as informative and noninvasive ***,quantitatively detecting TDEs is still ***,we constructed a DNA tetrahedral-structured probe(TSP)-mediated microfluidic magnetic detection system(μFMS)to provide a rapid and sensitive platform for analyzing ***63 aptamer-modified Fe_(3)O_(4)magnetic nanoparticles(MNPs)were constructed to form magnetic nano-report probes(MNRs).The microfluidic chips were fabricated from glass functionalized with DNA TSP-modified aldehyde groups and a PDMS layer designed with serpentine *** induction coil-based magnetic detector was used to measure the magnetic *** linear dynamic range of theμFMS system for TDE assays was 1.98×10^(3)-1.98×10^(7)particles/mL with a limit of detection of 1.98×10^(3)particles/mL in *** was no significant difference in TDE detection between the simulated serum and PBS,which indicated the feasibility of the constructedμFMS system for TDE analysis in complex biological *** terms of cost,reaction time and operation procedure,thisμFMS has the potential to be developed as a clinical point-of-care testing tool for cancer diagnosis and therapeutics.

关键词： fluid diagnosis magnetic

A dual-eddy EMMS-based turbulence model for laminar-turbulent transition prediction

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

Particuology 2021年第5期19卷 285-298页

作者： Shuyu Guo Limin wang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical engineering University of Chinese Academy of SciencesBeijing 100049China Innovation academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China

Turbulence is a century-old physics problem,and the prediction of laminar-turbulent transition remains a major challenge in computational fluid dynamics(CFD).This paper proposes a new conceptual multiscale-structure flow system consisting of a nonturbulent part and two types of turbulent eddies with different *** stability criterion for turbulent transition flows,based on the principle of compromise-in-competition between viscosity and inertia,is used to obtain model *** multiscale-structure concept and stability criterion are the characteristics of the dual-eddy energy-minimization multiscale(EMMS)-based turbulence *** solved heterogeneous structure parameters and energy dissipation rate are analyzed,which reveal the laminar-turbulent transition *** validate the dual-eddy EMMS-based turbulence model,three benchmark problems,namely,the transitional flows over the flat plate boundary layer with zero pressure gradient,NACA0012,and Aerospatiale-A airfoils,were *** simulation was performed by combining the optimized results from the proposed model with the equations of the well-known κ-ω shear stress transfer(SST)turbulence *** numerical results show that the dual-eddy EMMS-based turbulence model improves the prediction in the laminar-turbulent transition *** demonstrates the soundness of using the multiscale-structure concept in turbulent flows to establish the turbulence transition model by considering the principle of compromise-in-competition between viscosity and inertia.

关键词： Turbulent flows Laminar-turbulent transition EMMS Turbulence model Multiscale structure

Damage characteristics of YAG transparent ceramics under different loading conditions

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

Defence Technology（防务技术） 2022年第8期18卷 1394-1404页

作者： Kuo Bao Xian-feng Zhang Gui-ji wang Jia-jie Deng Tao Chong Dan Han Bing-qiang Luo Meng-ting Tan School of Mechanical engineering Nanjing University of Science&TechnologyNanjing210094China institute of fluid physics CAEPMianyang621900China Shanghai institute of Ceramics Chinese Academy of SciencesShanghai200050China

YAG (Y_(3)Al_(5)O_(12)) transparent ceramics have attractive application prospects for transparent armor protection modules because of their excellent light transmittance and anti-ballistic capability. Understanding the fracture behavior and damage mechanism of YAG is necessary for armor design. To explore the damage characteristics of YAG under compression and tension, shock compression and shockless spalling experiments with soft recovery technique are conducted. The spall strength of YAG is obtained and the recovered samples are observed by CT and SEM. It is shown that the macroscopic damage characteristic of YAG under compression is vertical split cracks with oblique fine cracks distributed in the entire sample, while that under tension is horizontal transgranular cracks concentrated near the main spall surface. The cracks generated by macroscopic compression, tension and shear stress extend in similar tensile form at the microscale. The proportion of transgranular fractures on spall surfaces is higher than that of cracks induced by macroscopic compression. Meanwhile, higher loading rate and longer loading duration increase the transgranular fracture percentage.

关键词： YAG transparent Ceramics Damage characteristics Impact loading Shock compression Spall strength

A new solver for granular avalanche simulation： Indoor experiment verification and field scale case study

在线全文

学校读者我要写书评

暂无评论

Science china(physics,Mechanics & Astronomy) 2017年第12期60卷 45-55页

作者： XiaoLiang wang JiaChun Li Key Laboratory for Mechanics in fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China School of engineering Science University of Chinese Academy of Sciences Beijing 100049 China

A new solver based on the high-resolution scheme with novel treatments of source terms and interface capture for the Savage-Hutter model is developed to simulate granular avalanche flows. The capability to simulate flow spread and deposit processes is verified through indoor experiments of a two-dimensional granular avalanche. Parameter studies show that reduction in bed friction enhances runout efficiency, and that lower earth pressure restraints enlarge the deposit spread. The April 9, 2000,Yigong avalanche in Tibet, china, is simulated as a case study by this new solver. The predicted results, including evolution process, deposit spread, and hazard impacts, generally agree with site observations. It is concluded that the new solver for the Savage-Hutter equation provides a comprehensive software platform for granular avalanche simulation at both experimental and field scales. In particular, the solver can be a valuable tool for providing necessary information for hazard forecasts, disaster mitigation, and countermeasure decisions in mountainous areas.

关键词：室内实验求解器模拟雪崩颗粒验证高分辨率格式危险预测

Long-term change in low-cloud cover in Southeast china during cold seasons

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2022年第6期15卷 9-14页

作者： Zhe Chen Minghuai wang Haipeng Zhang Shuheng Lin Zhun Guo Yiquan Jiang Chen Zhou institute for Climate and Global Change Research School of Atmospheric SciencesNanjing UniversityNanjingChina Department of Atmospheric and Oceanic Science&Earth System Science Interdisciplinary Center University of MarylandCollege ParkMDUSA School of Atmospheric Sciences Sun Yat-sen UniversityZhuhaiChina Southern Marine Science and engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina

中国东南地区在冬春冷季节盛行低云,对局地能量平衡和水文循环有重要的作用.本研究使用多套数据和数值模拟结果,分析这一地区冷季节内低云云量在1980年至2017年的长期变化.结果表明,低云云量经历了先下降后上升的趋势变化,转折点出现在2... 详细信息

中国东南地区在冬春冷季节盛行低云,对局地能量平衡和水文循环有重要的作用.本研究使用多套数据和数值模拟结果,分析这一地区冷季节内低云云量在1980年至2017年的长期变化.结果表明,低云云量经历了先下降后上升的趋势变化,转折点出现在2008年左右.局地水汽通量输送在影响低云云量的变化中起着至关重要的作用,其在冬季和春季分别受到哈德莱环流和沃克环流的影响.CMIP6中的气候模式对水汽通量输送的模拟能力欠佳,影响了对低云云量的模拟结果.

关键词：低云云量大尺度环流场哈德莱环流沃克环流

Numerical Simulation and Experimental Verification of the Stiffness and Stability of Thrust Pad Aerostatic Bearings

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical engineering 2018年第2期31卷 186-197页

作者： Hai-Long Cui Yang wang Bao-Rui wang Hong Yang Huan Xia institute of Mechinery Manufacturing Technology China Academy of Engineering Physics

Many researchers concentrate on improving the stiffness and stability of aerostatic bearings, however the contradiction between stiffness and stability is still existed. Therefore, orifice, multiple, and porous restrictors are designed to illustrate the influence of restrictor characteristics on the stability and stiffness of the aerostatic circular pad bearings. Because both the stiffness and stability of aerostatic bearings are determined by the internal pressure distribution, the full Navier?Stokes(N?S) equations are applied to solve internal pressure distribution in bearing film by using computational fluid dynamics(CFD) method. Simulation results present that the stiffness and stability of aerostatic circular pad bearings are influenced significantly by geometrical and material parameters, such as film thickness, orifice diameters, and viscous resistance coe cient. Verified by the experimental data, the micro vibration of orifice restrictor is almost the same as multiple restrictors with amplitude of 0.02 m/s~2, but it is much stronger than the porous restrictors with acceleration of 0.006 m/s~2. The optimal stiffness of multiple restrictors increased by 46%, compared to only 30.2 N/μm of orifice restrictor, and the porous restrictors had obvious advantage in the small film thickness less than 6 μm where the optimal stiffness increased to 38.3 N/μm. The numerical and experimental results provide guidance for improving the stiffness and stability of aerostatic bearings.

关键词： Aerostatic bearings CFD Restrictor characteristics Stability and stiffness