检索结果-南通市图书馆

Preface of the Special Issue on Symplectic Geometry and Mathematical Physics

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第1期40卷 1-2页

作者： Huijun Fan xiaobo liu Gang Tian Peking University BeijingChina

Symplectic geometry is a branch of differential geometry and differential topology and has its origins in the Hamiltonian formulation of classical *** the last few decades,symplectic geometry has experienced enormous progress and has had interactions with many other branches of mathematics,including enumerative geometry,low-dimensional topology,mathematical physics,Hamiltonian dynamics,integrable systems etc..

关键词： geometry topology Hamiltonian

Graphene reinforced nanoarchitectonics of 3D interconnected magnetic-dielectric frameworks for high-efficient and anti-corrosive microwave absorbers

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第1期168卷 194-207页

作者： Chenchen liu Xiaofang Feng Shuning liu Guo Lin Zhongxiang Bai Lingling Wang Ke Zhu Xiulan Li xiaobo liu School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials Chengdu611731China School of Chemical Engineering Northwest UniversityXi’an710069China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou510275China

The combination of high efficiency and environmental stability is vital to promote the commercial appli-cations of microwave absorption(MA)materials,yet remains challenging in the absence of facile ***,we put forward a graphene-reinforced construct approach for one-pot synthesis of 3D intercon-nected magnetic-dielectric frameworks via pre-functionalization and subsequent *** in-teractions among discrete precursors are capable of manipulating the confined growth and interfacial *** enhancements in MA properties are triggered in a straightforward manner us-ing ultralow feeding fractions of graphene oxide *** minimum reflection loss is up to-60.1 dB(99.9999%wave absorption)and the effective absorption bandwidth reaches 5.9 GHz(almost covering the Ku band).Remarkably,based on the optimization by ultralow concentrations of graphene,the as-prepared nanoarchitecture simultaneously integrates strong absorption,broad bandwidth,and low matching *** embedded graphene nanosheets serve as high-speed electron transmission channels and hollow resonance cavities,facilitating multimode attenuations and impedance-matching ***-while,the graphene-reinforced framework suppresses the corrosion of magnetic components,whose cor-rosion rate reduces by an order of *** study provides a simple procedure to boost magnetic-dielectric absorbers for comprehensive MA performances and enhanced corrosion resistance.

关键词： 3D Magnetic-dielectric framework Graphene nanosheet Microwave absorption Anti-corrosion

Propagation and Dispersion Characteristics of Scholte Wave in VTI Media with the Presence of Irregular Seabed

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

Journal of Earth Science 2024年第2期35卷 722-725页

作者： xiaobo liu Yun Wang Jianlei Zhang Haifeng Chen Hua Zhang School of Ocean Sciences China University of GeosciencesBeijing 100083China Key Laboratory of Polar Geology and Marine Mineral Resources China University of GeosciencesBeijing 100083China School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China Research&Development Center BGP IncCNPCZhuozhou 072751China National Engineering Research Center for Oil and Gas Exploration Computer Software Beijing 100080China

INTRODUCTION Surface waves propagating along the seafloor are general ly called Scholte waves,and were first discovered and studied in the early 1950s(Kugler et al.,2005;Buchen and Ben-Hador,1996).Scholte waves exhibit a dispersion phenomenon,which implies that their velocity varies with ***-frequency Scholte waves can propagate over long distances on the seabed with little attenuation(Bohlen et al.,2004).The particle mo tion of Scholte waves in a solid medium changes from a retro grade to a prograde ellipse(Klein et al.,2005;McMechan and Yedlin,1981).

关键词： seabed Dispersion implies

The global regulation of c-di-GMP and cAMP in bacteria

在线全文

学校读者我要写书评

暂无评论

mLife 2024年第1期3卷 42-56页

作者： Cong liu Rui Shi Marcus S.Jensen Jingrong Zhu Jiawen liu xiaobo liu Di Sun Weijie liu Jiangsu Key Laboratory of Phylogenomics&Comparative Genomics School of Life SciencesJiangsu Normal UniversityXuzhouChina Key Laboratory of Metabolic Engineering and Biosynthesis Technology Ministry of Industry and Information TechnologyNanjing University of Science and TechnologyNanjingChina

Nucleotide second messengers are highly versatile signaling molecules that regulate a variety of key biological processes in *** best-studied examples are cyclic AMP(cAMP)and bis-(3'-5')-cyclic dimeric guanosine monophosphate(c-di-GMP),which both act as global *** regulatory frameworks of c-di-GMP and cAMP in bacteria show several parallels but also significant *** this review,we llustrate the global regulatory models of the two nucleotide second messengers,compare the different regulatory frameworks between c-di-GMP and cAMP,and discuss the mechanisms and physiological significance of cross-regulation between c-di-GMP and cAMP.c-di-GMP responds to numerous signals de-pendent on a great number of metabolic enzymes,and it regulates various signal transduction pathways through its huge number of effectors with varying *** contrast,due to the limited quantity,the cAMP metabolic enzymes and its major effector are regulated at different levels by diverse *** performs its global regulatory function primarily by controlling the transcription of a large number of genes via cAMP receptor protein(CRP)in most *** review can help us understand how bacteria use the two typical nucleotide second messengers to effectively coordinate and integrate various physiological processes,providing theoretical guidelines for future research.

关键词： bacteria cAMP c-di-GMP cross-regulation CRP

Laboratory and Semi-Field Evaluation on S-Methoprene Formulations Against Anopheles sinensis(Diptera:Culicidae)—Yuxi City,Yunnan Province,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

China CDC weekly 2024年第6期6卷 105-108页

作者： Wenbo Hu Yijin Chen Ying Liang Tianyun Su Qiyong liu Xuewen Li xiaobo liu School of Public Health Cheeloo College of MedicineShandong UniversityJinan CityShandong ProvinceChina National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases WHO Collaborating Centre for Vector Surveillance and ManagementDepartment of Vector Biology and ControlNational Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina EcoZone International Riverside CityCAUSA Department of Environment and Health School of Public HealthCheeloo College of MedicineShandong UniversityJinan CityShandong ProvinceChina Department of Vector Control School of Public HealthShandong UniversityJi’nan CityShandong ProvinceChina Xinjiang Key Laboratory of Vector-borne Infectious Diseases Urumqi CityXinjiang830002

Summary What is already known about this topic?Anopheles sinensis(***)is the predominant malaria vector in *** impact of S-methoprene on the emergence process of mosquito larvae suggests its potential as a control met... 详细信息

关键词： sinensis China. predominant

Acoustic Full Waveform Inversion of DAS-VSP Data

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

Journal of Earth Science 2024年第5期35卷 1795-1798页

作者： Shuo Zhang Jun Lu xiaobo liu Chengyu Pan Zhidong Cai School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China School of Ocean Sciences China University of GeosciencesBeijing 100083China Key Laboratory of Polar Geology and Marine Mineral Resources China University of GeosciencesMinistry of EducationBeijing 100083China New Resources Geophysical Exploration Division BGP Inc.CNPCZhuozhouHebei 072751China

INTRODUCTION The optical-fiber distributed acoustic sensing-vertical seismic profiling(DAS-VSP)acquisition system can record seismic data in wells continuously,thus providing several advantages such as dense spatial sampling,high signal-to-noise ratio,high acoustic sensitivity,and broad bandwidth(Ellmauthaler et al.,2021;Spikes et al.,2019).

关键词： seismic VSP Inversion

在线全文

学校读者我要写书评

暂无评论

学者小说:“无界”时代的“多栖”写作

南方文坛 2024年第2期 179-184页

作者：刘小波西南科技大学文学与艺术学院

一般而言,作家都具有多套笔法,“两栖”或“多栖”写作在整个文学史上都是十分常见的现象,不少人既从事文学研究工作,也进行原创,涉及不同的文体,很多从事文学理论批评的学者同时也是诗人、散文家、小说家。如丁帆的散文写作,张清华、... 详细信息

一般而言,作家都具有多套笔法,“两栖”或“多栖”写作在整个文学史上都是十分常见的现象,不少人既从事文学研究工作,也进行原创,涉及不同的文体,很多从事文学理论批评的学者同时也是诗人、散文家、小说家。如丁帆的散文写作,张清华、张新颖的诗歌写作。近年来,不少从事文学研究工作的学者纷纷推出了小说作品,这一“多栖”写作的现象值得关注。学者小说因其创作主体的文学修养,普遍具有较高的水准,良篇佳构不断涌现。学者小说的流行与文学无界时代背景下作家群体构成变化有较大的关系.

关键词：文学理论批评学者小说作家群体小说作品张清华散文写作诗歌写作创作主体

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

不同聚能射流水下毁伤性能对比分析

哈尔滨工程大学学报 2024年第8期45卷 1434-1441页

作者：刘晓波梁德利刘启庆王诗平哈尔滨工程大学船舶工程学院黑龙江哈尔滨150001 北京宇航系统工程研究所北京100076 上海交通大学航空航天学院上海200240

为进一步探究药型罩形状在不同壳体结构下的适用性问题及水层厚度影响,本文讨论了球缺形、60°锥角形及圆顶锥形3种药型罩结构及炸高中水层厚度因素对聚能射流毁伤性能的影响。通过对聚能射流形状、速度、头部宽度变化及靶板破口尺寸进... 详细信息

为进一步探究药型罩形状在不同壳体结构下的适用性问题及水层厚度影响,本文讨论了球缺形、60°锥角形及圆顶锥形3种药型罩结构及炸高中水层厚度因素对聚能射流毁伤性能的影响。通过对聚能射流形状、速度、头部宽度变化及靶板破口尺寸进行数值分析,发现球缺形药型罩对近距离单层壳结构破坏最大,而对于双层壳结构,圆顶锥形药型罩形成的聚能射流连续性和侵彻效果更优,60°锥角形药型罩次之。随着炸高中水层厚度的增加,靶板破口尺寸增大,并在水层厚度为300 mm附近其增量发生正向突跃。研究表明:控制水层厚度可以进一步增强聚能射流水下毁伤效果,本文研究可为聚能战斗部毁伤性能研究提供参考。

关键词：聚能射流药型罩水层厚度毁伤性能水下爆炸数值模拟射流侵彻炸高

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

从世俗中来,到灵魂里去——范小青论

东吴学术 2024年第3期 16-24页

作者：刘小波西南科技大学文学与艺术学院《当代文坛》杂志社

范小青是“苏味小说”的传承者与坚守者,其作品蕴含着浓郁的苏州风味,但是她的作品主旨又远远超越了狭隘的地域性,有着更为广阔的书写空间。范小青的写作秉持现实主义这一准绳,集中在对普通个体日常生活的描摹。范小青的文字充满着浓郁... 详细信息

范小青是“苏味小说”的传承者与坚守者,其作品蕴含着浓郁的苏州风味,但是她的作品主旨又远远超越了狭隘的地域性,有着更为广阔的书写空间。范小青的写作秉持现实主义这一准绳,集中在对普通个体日常生活的描摹。范小青的文字充满着浓郁的烟火气息,其作品通过对世俗生活的深度描写,来关怀众生、记录时代、拷问人性。范小青将现实主义延展开去,作品不乏超现实的元素,这是一种“无边的现实主义”写作。范小青的写作呈现出一种对人类普遍命运的关注,是对人之存在的深度思考,通过诗意化的写作,找到一条走出困境的路径,实现诗意地栖居。

关键词：范小青 “苏味小说” “无边现实主义” 存在困境诗意栖居