检索结果-南通市图书馆

电子与信息学报 2024年第5期46卷 2004-2010页

作者：刘志勇金子皓杨洪娟刘彪唐新丰李博哈尔滨工业大学(威海)信息科学与工程学院威海264209 北京宇航系统工程研究所北京100076 山东省海洋电子信息与智能无人系统重点实验室威海264209 海洋无人系统跨域协同与综合保障工业和信息化部重点实验室威海264209

为了更好地解决水声信道中的衰落及严重码间干扰问题,该文提出一种基于深度学习的联合多分支合并与均衡算法。该算法借助深度学习网络的非线性拟合能力,联合实现了多分支合并和均衡。在算法实现中,合并与均衡并非相互独立,而是基于深度... 详细信息

为了更好地解决水声信道中的衰落及严重码间干扰问题,该文提出一种基于深度学习的联合多分支合并与均衡算法。该算法借助深度学习网络的非线性拟合能力,联合实现了多分支合并和均衡。在算法实现中,合并与均衡并非相互独立,而是基于深度学习网络的总输出计算出总误差,以总误差对网络参数实现联合调整,数据集则基于统计水声信道模型进行构建。仿真结果表明,相较于已有算法,所提算法能获得更快的收敛速度和更好的误码率性能,使得其能更好地适应水声信道。

关键词：水声通信深度学习水声信道联合多分支合并与均衡

维普期刊数据库

Polarization-selective nanogold absorber by twisted stacking

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 10392-10400页

作者： Fei Wang zexiang Han Juehan Sun Wajid Ali Xiaoli Wang zhiyong tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Metamaterial absorbers show great promise for applications in optical manipulation,photodetection,solar energy harvesting,and *** this work,we present a twisted stacked metamaterial design that serves as a plasmonic perfect absorber with polarization *** effective energy localization,the metamaterial realizes a near-unity absorbance of up to 99.6%for right circularly polarized incidence and 97.2%for left circularly polarized *** a longer wavelength in the visible range,the chiral metamaterial becomes more sensitive to the polarization state of the incident wave,retaining an ultrahigh absorption of light(~94%)for only a given polarization state,that is,light in this polarization state is effectively shielded.A giant circular dichroism signal of up to 7°can be simultaneously *** field and charge distribution simulations further reveal that the ultrahigh performance of the design is attributed to the interplay between cavity coupling,magnetic resonances,and plasmonic *** switchable and tunable chirality,the plasmonic metamaterial presents a nearperfect absorption band with tunable operational *** envision that the high-performance chiral gold metamaterial proposed here can serve as a good candidate for light trapping,chirality sensing,polarized light detection,and polarizationenhanced photocatalysis.

关键词： perfect absorber chirality plasmonic metal-dielectric-metal magnetic field enhancement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

唐韩休墓壁画修复阶段霉菌病害成因分析

文物保护与考古科学 2024年第4期36卷 86-93页

作者：李倩高小超路智勇王佳金紫琳唐欢陕西历史博物馆陕西西安710061 馆藏壁画保护修复与材料科学研究国家文物局重点科研基地(陕西历史博物馆西北工业大学)陕西西安710061 重庆中国三峡博物馆重庆400015 馆藏文物有害生物控制研究国家文物局重点科研基地(重庆中国三峡博物馆) 重庆400015

为评估韩休墓壁画搬迁阶段霉菌病害治理方式的有效性和长效性,研究现修复阶段霉菌病害成因及治理措施,本研究通过超景深显微镜分析霉菌病害特征,采用分子技术鉴定壁画霉菌种属,结合搬迁阶段霉菌鉴定结果、保存环境监测数据等,探究搬迁... 详细信息

为评估韩休墓壁画搬迁阶段霉菌病害治理方式的有效性和长效性,研究现修复阶段霉菌病害成因及治理措施,本研究通过超景深显微镜分析霉菌病害特征,采用分子技术鉴定壁画霉菌种属,结合搬迁阶段霉菌鉴定结果、保存环境监测数据等,探究搬迁阶段霉菌治理方式对修复阶段菌群发展、演替的影响。结果表明:修复阶段壁画霉菌样品分离的11株菌株分属青霉属(Penicillium)与枝孢属(Cladosporium)。与搬迁阶段相比,壁画表面霉菌多样性显著降低,优势菌青霉菌菌落组成也存在较大差异,显示出克霉唑等防霉剂对曲霉菌、镰刀菌、交链孢菌生长的有效抑制以及青霉菌对环境的适应性与选择性。韩休墓壁画表面霉菌代谢产物作用于壁画基质,使壁画出现霉斑污染、变色等病害,且青霉菌菌丝体已深入地仗内部,对壁画结构稳定性危害极大。建议及时开展表面黄色、黑色霉菌分类清洗,杀菌剂筛选以及展柜环境监测控制等保护工作,以实现对韩休墓壁画霉菌病害的常态化治理。

关键词：韩休墓壁画霉菌调查霉菌鉴定成因分析

维普期刊数据库博看期刊

Effect of quenching residual stress on precipitation behaviour of 7085 aluminium alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第1期132卷 154-165页

作者： jin Liu zhiyong Du jinlong Su Jie tang Fulin Jiang Dingfa Fu Jie Teng Hui Zhang College of Materials Science and Engineering Hunan UniversityChangsha 410082China

The quenching-induced residual stress in ultrahigh strength Al-Zn-Mg-Cu alloys has a great influence on their precipitation behaviour in subsequent heat treatment and the properties of the final *** the present work,the cladding quenching method was employed for 7085 Al alloy slabs to tailor different quenching residual *** the effects of quenching residual stress on the precipitation behaviour of the 7085 Al alloy were investigated through finite element analysis,residual stress and hardness distri-bution measurements and microstructural *** results indicate that the reduction in resid-ual stress increases with increasing cladding layer *** a cladding layer thickness in the range of 1-1.4 mm,the residual stress is almost *** hardness at the surface of the aged sample with a large compressive residual stress is decreased,while the hardness at the centre of the sample with a large tensile residual stress is *** hardness is approximately identical between the aged sam-ples with little or no residual *** elastic lattice distortion caused by residual stress is found to promote the nucleation of precipitates during the artificial ageing *** in-depth mechanisms for the effect of quenching residual stress on the precipitation of 7085 Al alloy are also discussed.

关键词： Aluminium alloy Quenching Residual stress Precipitation Finite element method

Coordination-responsive drug release inside gold nanorod @ metal-organic framework core-shell nanostructures for near-infrared-induced synergistic chemo-photothermal therapy

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 Research 2018年第6期11卷 3294-3305页

作者： Yantao Li Jun jin Dawei Wang Jiawei Lv Ke Hou Yaling Liu Chunying Chen zhiyong tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China

Multifunctional core-shell nanostructures formed by integration of distinct components have received wide attention as promising biological platforms in recent years. In this work, crystalline zeolitic imidazolate framework-8 （ZIF-8）, a typical metal-organic framework （MOF）, is coated onto single gold nanorod （AuNR） core for successful realization of synergistic photothermal and chemotherapy triggered by near-infrared （NIR） light. Impressivel）~ high doxorubicin hydrochloride （DOX） loading capacity followed by pH and NIR light dual stimuli-responsive DOX release can be easily implemented through formation and breakage of coordination bonds in the system. Moreover, under NIR laser irradiation at 808 nm, these novel AuNR@MOF core-shell nanostructures exhibit effective synergistic chemo-photothermal therapy both in vitro and in vivo, confirmed by cell treatment and tumor ablation via intravenous injection.

关键词： core-shell nanostructures coordination bonds dual stimuli response synergistic cancer therapy

Macrophage-derived IL-1α promotes sterile inflammation in a mouse model of acetaminophen hepatotoxicity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2018年第11期15卷 973-982页

作者： Chao Zhang jin Feng Jun Du zhiyong Zhuo Shuo Yang Weihong Zhang Weihong Wang Shengyuan Zhang Yoichiro Iwakura Guangxun Meng Yang-Xin Fu Baidong Hou Hong tang The Key Laboratory of Infection and Immunity The Institute of BiophysicsChinese Academy of Sciences100101BeijingChina The Institute of Biotechnology Shanxi University030006TaiyuanChina The Key Laboratory of Molecular Virology and Immunology Institut Pasteur of ShanghaiChinese Academy of Sciences200031ShanghaiChina Division of Experimental Animal Immunology Center for Animal Disease ModelsResearch Institute for Biomedical SciencesTokyo University of Science278-0022ChibaJapan Department of Pathology The University of Chicago60637ChicagoUSAIL

The metabolic intermediate of acetaminophen(APAP)can cause severe hepatocyte necrosis,which triggers aberrant immune activation of liver non-parenchymal cells(NPC).Overzealous hepatic inflammation determines the morbidity and mortality of APAP-induced liver injury(AILI).Interleukin-1 receptor(IL-1R)signaling has been shown to play a critical role in various inflammatory conditions,but its precise role and underlying mechanism in AILI remain ***,we show that NLRP3 inflammasome activation of IL-1βis dispensable to AILI,whereas IL-1α,the other ligand of IL-1R1,accounts for hepatic injury by a lethal dose of ***,Kupffer cells function as a major source of activated IL-1αin the liver,which is activated by damaged hepatocytes through TLR4/MyD88 ***,IL-1αis able to chemoattract and activate CD11b^(+)Gr-1^(+) myeloid cells,mostly neutrophils and inflammatory monocytes,to amplify deteriorated inflammation in the ***,this work identifies that MyD88-dependent activation of IL-1αin Kupffer cells plays a central role in the immunopathogenesis of AILI and implicates that IL-1αis a promising therapeutic target for AILI treatment.

关键词： acetaminophen IL-α Kupffer cells sterile immunity TLR4

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

In memorial of *** Xie

Nano Research 2023年第11期16卷 12363-12363页

作者： Weiya Zhou Xun Wang zhiyong tang jin Zhang Shoushan Fan Institute of Physics Chinese Academy of SciencesBeijing 100190China Department of Chemistry Tsinghua UniversityBeijing 100084China Chinese Academy of Science(CAS)Key Laboratory of Nanosystem and Hierarchy Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China College of Chemistry and Molecular Engineering Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China Department of Physics Tsinghua UniversityBeijing 100084China

*** Xie(1942–2022),a pioneer in nanoscience and nanotechnology,an academician of the Chinese Academy of Sciences(CAS),an academician of the World Academy of Sciences for the advancement of science in developing countries(TWAS),a renowned physicist and professor at the Institute of Physics,and the National Center for Nanoscience and Technology,has dedicated his entire career to the development of nanoscience and nanotechnology in China.

关键词： nanotechnology she advancement

相互干扰系数法校正ICP-AES多元素同时分析的光谱干扰

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光谱学与光谱分析 1998年第3期18卷 329-333页

作者：金泽祥陈柏林江惠坚汤志勇中国地质大学应用化学系

提出了一种相互干扰系数法校正ＩＣＰＡＥＳ多元素同时分析的光谱干扰方法。该方法把分析对象视为所有组分之间都相互关联的体系，并选择严密的数学模型来校正复杂组分间的相互干扰。

关键词：光谱干扰相互干扰系数干扰校正 ICP-AES AES

维普期刊数据库

悬浮液HG－AFS法测定土壤及地质样品中的痕量砷

在线全文

学校读者我要写书评

暂无评论

武汉化工学院学报 1995年第4期17卷 5-8页

作者：艾军汤志勇金泽祥武汉化工学院中国地质大学

本文提出了一种新的测定土壤及地质样品中痕量砷的简便而快速的方法。该法是把悬浮液技术与砷氢化物发生无色散原子荧光光谱法（ＨＧ－ＡＦＳ）相结合的分析方法。试验了酸介质、悬浮液粒度、悬浮液浓度等因素对砷氢化物发生效率的影响... 详细信息

本文提出了一种新的测定土壤及地质样品中痕量砷的简便而快速的方法。该法是把悬浮液技术与砷氢化物发生无色散原子荧光光谱法（ＨＧ－ＡＦＳ）相结合的分析方法。试验了酸介质、悬浮液粒度、悬浮液浓度等因素对砷氢化物发生效率的影响。以国家水系沉积物Ⅰ级标准样作为标准系列，测定了土壤和地质样品中的痕量砷，所得结果准确可靠。

关键词：悬浮液砷测定 HG-AFS法土分析

维普期刊数据库