检索结果-南通市图书馆

Molecular Dynamics Simulation of Microstructure of Nanocrystalline Copper

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

Chinese Physics Letters 2001年第3期18卷 411-413页

作者： WEN Yu-Hua zhou fu-xin LIU Yue-Wu State Key LNM Institute of MechanicsChinese Academy of SciencesBeijing 100080

The microstructure of computer generated nanocrystalline coppers is simulated by using molecular dynamics with Finnis-Sinclair potential,analysed by means of radial distribution functions,coordination number,atomic energy and local crystalline *** influence of the grain size on the nanocrystalline structure is *** results reveal that as the grain size is reduced,the grain boundary shows no significant structural difference,but the grain interior becomes more disordered,and their structural difference diminishes gradually;however,the density and the atomic average energy of the grain boundary present different tendencies from those of the grain interior.

关键词： grain Microstructure microstructure

发热,咯血,腹泻,急性左心衰竭,急性呼吸衰竭

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

基础医学与临床 2005年第10期25卷 960-963页

作者：曹彬周新福中国医学科学院中国协和医科大学北京协和医院呼吸内科北京100730

1 病历摘要.患者，男，未婚，28岁。因发热2周，咳嗽、咯血1周入院。

关键词：发热咯血腹泻急性左心衰竭急性呼吸衰竭临床表现重症肺炎

Positive Solutions of Boundary Value Problem for a Coupled System of Nonlinear Third-order Differential Equations

在线全文

学校读者我要写书评

暂无评论

Chinese Quarterly Journal of Mathematics 2013年第4期28卷 522-531页

作者： ZHANG Yu-chuan zhou Zong-fu XU xin School of Mathematical Sciences Anhui University Hefei 230039 China

By using cone expansion-compression theorem in this paper, we study boundary value problems for a coupled system of nonlinear third-order differential equation. Some sufficient conditions are obtained which guarantee the boundary value problems for a coupled system of nonlinear third-order differential equation has at least one positive solution. Some examples are given to verify our results.

关键词： boundary value problem coupled system positive solution cone expansion-compression theorem

A low redox potential and long life organic anode material for sodium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang Wei Kang zhou xin Huang xing zhou Jie Xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

关于推进农业产业化经营的探讨

中小企业管理与科技 2017年第24期1卷 45-46页

作者：周新福河南金粒麦业有限公司河南新乡453200

我国是一个农业大国,农业经济是我国国民经济增长的主要组成部分。为进一步推动我国农业的发展,必须要加快我国农业的产业化经营。论文主要以目前我国农业产业化经营主要类型入手,讨论了目前农业产业化经营中存在的问题,并提出了相应的... 详细信息

我国是一个农业大国,农业经济是我国国民经济增长的主要组成部分。为进一步推动我国农业的发展,必须要加快我国农业的产业化经营。论文主要以目前我国农业产业化经营主要类型入手,讨论了目前农业产业化经营中存在的问题,并提出了相应的改善对策,供相关工作者参考。

关键词：农业产业化经营问题对策

在线全文

学校读者我要写书评

暂无评论

浅谈我国农业产业化经营模式及影响因素

中小企业管理与科技 2017年第28期1卷 59-60页

作者：周新福河南金粒麦业有限公司河南新乡453200

调整农业结构,推进产业化经营是发展现代农业的重大战略和主要模式。论文针对龙头企业主导型、中介组织联动型、合作社一体化型三种类型的农业产业化经营模式进行了深入研究,并针对影响我国农业产业化经营的因素进行了分析,同时提出了... 详细信息

调整农业结构,推进产业化经营是发展现代农业的重大战略和主要模式。论文针对龙头企业主导型、中介组织联动型、合作社一体化型三种类型的农业产业化经营模式进行了深入研究,并针对影响我国农业产业化经营的因素进行了分析,同时提出了一系列解决对策,旨在为我国农业产业化经营的发展提供参考。

关键词：农业产业化经营模式影响因素

A SUPER-BROADENED STIMULATED SCATTERING IN LIQUID-FILLED WAVEGUIDE WITH LONG GAIN LENGTH

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1985年第10期2卷 477-479页

作者： HE Guang-sheng TANG Ding-yuan CAO Zhuo-liang zhou fu-xin WANG Run-wen LIU Song-hao Shanghai Institute of Optics and Fine Mechanics Academia Sinica

Using an intense visible laser pulse to excite the liquid-filled waveguide with a long gain length,we have observed a new stimulated-scattering with super-broadened spectral width(500cm^(-1))in addition to the sharp l... 详细信息

关键词： waveguide scattering WAVE

Physical Layer Security Scheme With AoI-Awareness for Industrial IoT Based on Covert Communications

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

IEEE/CAA Journal of Automatica Sinica 2025年第1期 276-278页

作者： Yaping Li Zhi-xin Liu Jia-Wei Su Ya-zhou Yuan the Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University

Dear Editor,Industrial Internet of things(IIoT) is a typical application of cyberphysical system(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deployment-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to physical security, such as malicious detections and attacks [1].

关键词：

BDNF/TrkB通路与β-淀粉样蛋白的关系研究进展

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中华神经医学杂志 2013年第8期12卷 857-859页

作者：张芳周新富肖志成昆明医学院分子临床医学研究院昆明650500

脑源性神经生长因子（brain-derived neurotrophic factor,BDNF）对维持神经元存活、生长、分化及神经损伤后的修复与再生具有十分重要的意义[1].近年研究发现大脑中BDNF水平的下降与阿尔茨海默病（Alzheimer disease,AD）的发病具有密... 详细信息

脑源性神经生长因子（brain-derived neurotrophic factor,BDNF）对维持神经元存活、生长、分化及神经损伤后的修复与再生具有十分重要的意义[1].近年研究发现大脑中BDNF水平的下降与阿尔茨海默病（Alzheimer disease,AD）的发病具有密切关系.BDNF与其受体酪氨酸激酶受体（tropomyosin-related kinase B,TrkB）结合发挥生物学作用,有文献报道β-淀粉样蛋白（Aβ）能负调节TrkB[2],因此BDNF/TrkB通路可能在生物学上与β-淀粉样蛋白相关,二者的关系可能会成为治疗AD的新方向.故本文综述二者关系研究进展如下.

关键词：阿尔茨海歇病 β-淀粉样蛋白脑源性神经营养因子酪氨酸激酶受体