检索结果-南通市图书馆

Science China(Life Sciences) 2022年第3期65卷 618-630页

作者： Xia Wang jiaxuan cheng Jiawei Shen Liguo Liu Ningning Li Ning Gao Feng Jiang Qi Jin NHC Key Laboratory of Systems Biology of Pathogens Institute of Pathogen BiologyChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Tsinghua-Peking Center for Life Sciences School of Life SciencesTsinghua UniversityBeijing 100084China State Key Laboratory of Membrane Biology Peking-Tsinghua Center for Life SciencesSchool of Life SciencesPeking UniversityBeijing 100871China

The extracellular contractile injection systems(e CISs)are encoded in the genomes of a large number of bacteria and *** have previously characterized the overall structure of Photorhabdus Virulence Cassette(PVC),a typical member of the e CIS *** resembles the contractile tail of bacteriophages and exerts its action by the contraction of outer sheath and injection of inner tube plus central ***,the biological function of PVC effectors and the mechanism of effector translocation are still *** combining cryo-electron microscopy and functional experiments,here we show that the PVC effectors Pdp1(a new family of widespread d NTP pyrophosphatase effector in e CIS)and Pnf(a deamidase effector)are loaded inside the inner tube lumen in a"Peas in the Pod"***,we observe that Pdp1 and Pnf can be directly injected into J774 A.1 murine macrophage and kill the target cells by disrupting the d NTP pools and actin cytoskeleton formation,*** results provide direct evidence of how PVC cargoes are loaded and delivered directly into mammalian macrophages.

关键词： Photorhabdus asymbiotica PVC cryo-electron microscopy effector pyrophosphatase

基于具身认知的智慧社区文娱设施适老化设计研究

在线全文

学校读者我要写书评

暂无评论

包装工程 2024年第6期45卷 471-478页

作者：程嘉萱邝慧仪汪洋浙江农林大学暨阳学院浙江绍兴311800

目的基于人口老龄化的社会背景,结合智慧社区的发展导向,运用具身认知理论探究适老化文娱设施的设计策略,优化智能文娱设施的可用性,提升老年用户的体验感。方法通过文献数据库分析适老化设计的研究现状、具身认知的理论概念和应用于适... 详细信息

目的基于人口老龄化的社会背景,结合智慧社区的发展导向,运用具身认知理论探究适老化文娱设施的设计策略,优化智能文娱设施的可用性,提升老年用户的体验感。方法通过文献数据库分析适老化设计的研究现状、具身认知的理论概念和应用于适老化设计的优势。以智能文娱设施为设计载体,运用深度访谈、实地调研等用户研究方法,绘制老年群体智能文娱设施用户体验地图,梳理老年群体的需求痛点,从设计的本能、行为、反思三个层次构建智慧社区文娱设施适老化设计策略模型,提出智能文娱设施适老化设计的设计路径,展开设计实践。结论体验、心智,以及身体与环境的互动是影响认知的重要因素。具身认知理论结合智慧文娱设施设计,满足了老年群体的安全、易用,以及情感需求,为提升老年群体智能文娱设施的用户体验提供了一种可行的策略,也为智慧社区适老化设计提供了参考。

关键词：具身认知智慧社区文娱设施适老化设计

维普期刊数据库博看期刊

马鞍山市环雨山湖中心绿道植物群落结构与多样性分析

在线全文

学校读者我要写书评

暂无评论

安徽大学学报（自然科学版） 2023年第5期47卷 85-93页

作者：成佳璇陈蕾如许克福安徽农业大学林学与园林学院安徽合肥230036

城市绿道是城市生态系统与游憩系统的重要组成部分,研究植物群落结构与多样性对绿道的规划建设具有重要意义.笔者以马鞍山市环雨山湖中心绿道为例,选取其中雨山湖公园、南湖公园、儿童公园、其他绿地4片样地中25个代表性植物群落,对其... 详细信息

城市绿道是城市生态系统与游憩系统的重要组成部分,研究植物群落结构与多样性对绿道的规划建设具有重要意义.笔者以马鞍山市环雨山湖中心绿道为例,选取其中雨山湖公园、南湖公园、儿童公园、其他绿地4片样地中25个代表性植物群落,对其物种组成、群落结构、外貌特征及群落多样性进行调查研究.结果表明:(1)植物种类共计52科83属94种,乔木∶灌木∶草本种类比为1∶0.69∶0.40,应用频率较高的植物有樟、棕榈、二球悬铃木、木樨、鸡爪槭、卫矛、红花檵木等;(2)绿道植物群落外貌特征以常绿阔叶和落叶阔叶树种为主,针叶树种类较少;(3)绿道内乔灌木的径阶和高阶分布范围较广,群落层次丰富,整体来看仍处于生长阶段;(4)4片样地中,雨山湖公园段植物群落的Shannon-Wiener指数和Margalef丰富度指数最高,其他绿地段的相对较低.因此,采用多色彩、多形态的树种,营造出多种类、多层次的植物群落,具有较高的物种多样性.建议环雨山湖中心绿道增加乡土树种,提高草本层植物的多样性,形成稳定的低维护群落,减少人工成本,营造景观优美、适宜市民游憩的城市绿道空间.

关键词：城市绿道物种组成群落结构外貌特征物种多样性

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

安徽万佛山省级自然保护区蕨类植物区系研究

安徽林业科技 2023年第5期49卷 17-21页

作者：彭克泉成佳璇舒城县林业局安徽六安231300 安徽农业大学林学与园林学院安徽合肥230036

万佛山省级自然保护区植物资源丰富,在该地开展蕨类植物区系研究可为种质资源保护和开发提供基本依据。本研究采集和鉴定了该区蕨类植物标本,编目了蕨类植物名目,分析了其区系。结果表明,(1)该区有蕨类植物22科50属97种,优势科主要有金... 详细信息

万佛山省级自然保护区植物资源丰富,在该地开展蕨类植物区系研究可为种质资源保护和开发提供基本依据。本研究采集和鉴定了该区蕨类植物标本,编目了蕨类植物名目,分析了其区系。结果表明,(1)该区有蕨类植物22科50属97种,优势科主要有金星蕨科、鳞毛蕨科、水龙骨科,优势属主要有卷柏属、鳞毛蕨属、石韦属。(2)世界蕨类分布类型有11科20属,其中热带分布类型有8科21属、温带分布型有3科9属;无中国特有分布类型;热带分布多于温带分布,具有明显的热带亲缘性。(3)该区蕨类植物有不同发展阶段的科分布,起源古老,是安徽蕨类植物多样性的重要分化和保存中心之一。(4)该区蕨类植物属的R/T值为2.33,以泛热带分布为主,处于中亚热带与北亚热带的过渡区,在中国蕨类植物区系分区上隶属于华东区系范围。

关键词：蕨类植物区系组成地理成分万佛山

Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei Xiong Xuan Ye Hongzhang cheng Xiaoming Liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

Tailoring Light–Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 262-280页

作者： Dongxiao Li Hong Zhou Zhihao Ren cheng Xu chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from the obstacles of low sensitivity,narrow bandwidth,and asymmetric Fano resonance ***,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(OC-Hμresonator)by precisely controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency detuning *** observed a strong dependence of the sensing performance on the coupling state,and demonstrated that OC-Hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asymmetric Fano *** characteristics represent a breakthrough in SEIRA technology and lay the foundation for specific recognition of biomolecules,trace detection,and protein secondary structure analysis using a single array(array size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy of 100%.Finally,we demonstrated the potential of OC-Hμresonator for SARS-CoV-2 *** findings will promote the wider application of SEIRA technology,while providing new ideas for other enhanced spectroscopy technologies,quantum photonics and studying light–matter interactions.

关键词： Plasmonic nanoantennas Light-matter interaction Surface-enhanced infrared absorption Overcoupled Biosensing

A Multi-Objective Particle Swarm Optimization Algorithm Based on Decomposition and Multi-Selection Strategy

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 997-1026页

作者： Li Ma Cai Dai Xingsi Xue cheng Peng School of Computer Science Shaanxi Normal UniversityXi’an710119China Fujian Provincial Key Laboratory of Big Data Mining and Applications Fujian University of TechnologyFuzhou350118China Information Construction and Management Center and Institute of Artificial Intelligence and Educational New Productivity Ningxia Normal UniversityGuyuan756099China

The multi-objective particle swarm optimization algorithm(MOPSO)is widely used to solve multi-objective optimization *** the article,amulti-objective particle swarm optimization algorithmbased on decomposition and multi-selection strategy is proposed to improve the search ***,two update strategies based on decomposition are used to update the evolving population and external archive,***,a multiselection strategy is *** first strategy is for the subspace without a non-dominated *** the neighbor particles,the particle with the smallest penalty-based boundary intersection value is selected as the global optimal solution and the particle far away fromthe search particle and the global optimal solution is selected as the personal optimal solution to enhance global *** second strategy is for the subspace with a non-dominated *** the neighbor particles,two particles are randomly selected,one as the global optimal solution and the other as the personal optimal solution,to enhance local *** third strategy is for Pareto optimal front(PF)discontinuity,which is identified by the cumulative number of iterations of the subspace without non-dominated *** the subsequent iteration,a new probability distribution is used to select from the remaining subspaces to ***,an adaptive inertia weight update strategy based on the dominated degree is designed to further improve the search ***,the proposed algorithmis compared with fivemulti-objective particle swarm optimization algorithms and five multi-objective evolutionary algorithms on 22 test *** results show that the proposed algorithm has better performance.

关键词： Multi-objective optimization multi-objective particle swarm optimization decomposition multi-selection strategy

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

“无盐则肿”考

中医学报 2021年第4期36卷 897-900页

作者：成稼璇徐静王明强南京中医药大学江苏南京210023

继《周礼》"以咸养脉"的五味将养论之后,《管子》首次提出了"无盐则肿"的致病理论,历代文献典籍对此多有沿承。在梳理相关文献记载后发现,因饮食乏盐所致肿病主要包含水肿病和瘿病两种,此可与《黄帝内经》所强调的过盐致病论相互补充。... 详细信息

继《周礼》"以咸养脉"的五味将养论之后,《管子》首次提出了"无盐则肿"的致病理论,历代文献典籍对此多有沿承。在梳理相关文献记载后发现,因饮食乏盐所致肿病主要包含水肿病和瘿病两种,此可与《黄帝内经》所强调的过盐致病论相互补充。虽然现代社会倡导的低钠盐饮食在心血管疾病的预防方面获得成效,但并不意味着进食的钠盐越少越好。若是长期饮食无盐,轻则食欲降低、浑身乏力,重则可生肿疾,危及生命。

关键词： “无盐则肿” 水肿瘿病低盐饮食以咸养脉过盐致病论《周礼》《管子》

Resistance of Cement-based Grouting Materials with Nano- SiO_(2) Emulsion to Chloride Ion Penetration

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 114-119页

作者： LI Shuiping cheng Jian WEI Chao YUAN Bin YU chengxiao College of Architectural Science and Engineering Yangzhou UniversityYangzhou 225127China

The chloride penetration resistance of cement-based grout materials was improved by nano-silica *** of mixtures containing different nano-silica particles or emulsions were exposed in sodium chloride solutions of specific concentrations with different test *** properties of the mixes were assessed in terms of weight loss and compressive strength.X-ray diffraction(XRD)and scanning electron microscopy(SEM)of mixes were performed to analysis the phase evolution and *** results demonstrated that the introduction of nano-SiO_(2) emulsion significantly decreased the compressive strength loss and calcium hydroxide(CH)crystal content of hydration production,and then enhanced the resistance of cement-based grouting materials to chloride ion *** improvement derives from the filling and pozzolanic effects of nano-SiO_(2) particles,which were incorporated via an emulsion and attributed to a well dispersion in grouting matrix.

关键词： grouting materials nano-SiO_(2)emulsion chloride ion penetration,weight loss strength loss

Preparation of FeCoNi medium entropy alloy from Fe^(3+)-Co^(2+)-Ni^(2+)solution system

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

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 92-101页

作者： Zongyou cheng Qing Zhao Mengjie Tao Jijun Du Xingxi Huang chengjun Liu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking(Ministry of Education) Shenyang 110819China

In recent years,medium entropy alloys have become a research hotspot due to their excellent physical and chemical *** controlling reasonable elemental composition and processing parameters,the medium entropy alloys can exhibit similar properties to high entropy alloys and have lower *** this paper,a FeCoNi medium entropy alloy precursor was prepared via sol-gel and coprecipitation methods,respectively,and FeCoNi medium entropy alloys were prepared by carbothermal and hydrogen *** phases and magnetic properties of FeCoNi medium entropy alloy were *** showed that FeCoNi medium entropy alloy was produced by carbothermal and hydrogen reduction at 1500℃.Some carbon was detected in the FeCoNi medium entropy alloy prepared by carbothermal *** alloy prepared by hydrogen reduction was uniform and showed a relatively high ***,the hydrogen reduction product exhibited better saturation magnetization and lower coercivity.

关键词： medium entropy alloy sol-gel co-precipitation carbothermal hydrogen reduction