检索结果-南通市图书馆

Influence characteristics of water penetration on fibre-reinforced polymer/rigid polyurethane foam interface of the composite cross-arm considering natural ageing

在线全文

学校读者我要写书评

暂无评论

High Voltage 2024年第1期9卷 81-93页

作者： Jun Xie Zhe Zhou ziqian liu Haonan Tian Sigang Zhang Qing Xie Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense North China Electric Power UniversityBaodingChina State Grid Gansu Electric Power Company LanzhouChina

Fibre-reinforced polymer(FRP)/rigid polyurethane foam(RPUF)interface is susceptible to moisture intrusion in addition to natural ageing during *** study investigated the influence of moisture intrusion on the FRP/RPUF interface under natural ageing using experiments and molecular dynamics(MD)*** absorption,shear strength,and leakage current tests were used to clarify the changes in the interface *** degradation mechanism of moisture intrusion at the interface under natural ageing was revealed by MD simulation and *** results show that the natural ageing of interfacial materials will slightly reduce the quality of the interface but will reduce the water resistance of the material and promote the process of water intrusion into the *** addition,water mainly invades the interface through *** water penetration,the interfacial bonding strength and insulation performance significantly *** and hydrolysis of interfacial materials are the main reasons for decreased interfacial *** can cause irreversible damage to the interface,increasing interface defects and water *** vicious cycle of material hydrolysis is the ultimate cause of interfacial *** polar molecules produced by this process and the water absorbed by the interface caused the degradation of the interface insulation performance.

关键词： interface polyurethane interfacial

Dependence of magnetic field just inside the magnetopause on subsolar standoff distance:Global MHD results

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 Science Bulletin 2012年第12期57卷 1438-1442页

作者： WANG Ming LU JianYong liu ziqian PEI ShiXin College of Math ＆ Physics Nanjing University of Information Science ＆ Technology Nanjing 210044 China National Center for Space Weather China Meteorology Administration Beijing 100081 China Chinese Academy of Meteorological Sciences Beijing 100081 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The subsolar magnetopause is the boundary between the solar wind and the Earth's magnetosphere,where reduced solar wind dynamic pressure is equal to the magnetic pressure of the Earth's outer *** use a global magnetohydrodynamic (MHD)model to estimate the ratio f of the compressed magnetic field just inside the subsolar magnetopause to the purely dipolar magnetic *** also compare our numerical results to a similar work by Shue,which used Time History of Events and Macroscale Interactions during Substorms(THEMIS)*** results show that the ratio f is linearly proportional to the subsolar magnetopause standoff distance(r0)for both the northward and southward interplanetary magnetic field,properties consistent with Shue but with a smaller proportionality ***,previous theoretical studies show that f is nearly independent of the subsolar standoff *** global model results also show that f is smaller for the southward Interplanetary Magnetic Field(IMF)under the same r0,and that the proportionality constant for the southward IMF is larger than that for the northward *** conclusions agree with statistical results from observations by Shue.

关键词：行星际磁场地球磁层磁流体距离国际货币基金组织模型估计相互作用历史事件

A Triformylphloroglucinol-based Covalent Organic Polymer:Synthesis,Characterization and Its Application in Visible-light-driven Oxidative Coupling Reactions of Primary Amines

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2020年第6期36卷 1017-1023页

作者： LI Xiaodong SU Qing liu ziqian LUO Kexin LI Guanghua WU Qiaolin College of Chemistry Jilin UniversityChangchun 130012P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun 130012P.R.China

A triformylphloroglucinol-based AiB2-typed covalent organic polymer(TFG-BPTH)was successfully constructed by the condensation reaction of triformylphloroglucinol(TFG)and 2.5-bis(2-propynyloxy)terephthalo-hydrazide(BPTH)under solvothermal *** structure of the TFG-BPTH was confirmed by spectra tech-niques including FTIR and solid-state IC CP/MAS NMR *** mophological features of TFG-BPTH were analyzed using scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The TFG-BPTH possessed good thermal and chemical stability,and exhibited good photocatalytic activity as a metal-free heterogeneous catalyst for oxidation of amines to valuable imines under visible light irradiation using O2 as greer *** addition,the catalyst could be readily recovered from the reaction mixture by simple filtration and reused for at least five cycles without any observable change in structure and catalytic activity.

关键词： Covalent organic polymer Condensation reaction Oxidation of amine Photocatalysis Heterogeneous catalysis

Polyfunctional Conjugated Microporous Polymers for Applications in Direct C—H Arylation of Unactivated Arenes and Aqueous Adsorption of Aromatic Amines

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2020年第6期36卷 1302-1309页

作者： LUO Kexin SU Qing JU Pengyao LI Xiaodong liu ziqian SUN Xiaoman LI Guanghua WU Qiaolin College of Chemistry Jilin UniversityChangchun 130012P.R.China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun 130012P.R.China

Salen-porphyrin-based conjugated microporous polymers(CMPs)have been demonstrated to be an attractive material platform for predesigned structures and promising ***,a new salen-porphyrin-based conjugated microporous polymer(SP-CMP-L)was solvothermally prepared by porphyrin-forming condensation reaction of pyrrole and salen-dialdehyde *** SP-CMP-L was characterized by spectroscopy technologies,and also exhibited excellent thermal and chemical *** porosity of SP-CMP-L was examined by N2 adsorption/desorption *** BET specific surface area of the CMP material was calculated to be 290.4 m^2/g with the pore volume of 0.19 cm^3/*** microstructure property of the resulting material was further evaculated by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The SP-CMP-L with salen and porphyrin multidentate coordination sites was proposed to serve as an initiator to promote the cross-coupling between aryl halides with unactivated arenes under base mediated *** transition-metal-free catalytic protocol provided high catalytic activity for direct C-H arylation reaction of unactivated arenes,and thus offered a convenient and efficient alternative for the construction biaryl *** addition,the salen-porphyrin based CMP material possessed remarkable adsorption capability for the removal of organic amines from water.

关键词： Conjugated microporous polymer C-H arylation Aqueous adsorption

Deep learning for smart agriculture:Concepts,tools,applications,and opportunities

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 Agricultural and Biological Engineering 2018年第4期11卷 32-44页

作者： Nanyang Zhu Xu liu ziqian liu Kai Hu Yingkuan Wang Jinglu Tan Min Huang Qibing Zhu Xunsheng Ji Yongnian Jiang Ya Guo Key Laboratory of Advanced Process Control for Light Industry Ministry of EducationJiangnan UniversityWuxi 214122China School of Internet of Things Jiangnan UniversityWuxi 214122China Chinese Academy of Agricultural Engineering Beijing 100125China Department of Bioengineering University of MissouriColumbiaMO 65211USA Jiangsu Zhongnong IoT Technology Co. LTDYixing 214200China

In recent years,Deep Learning(DL),such as the algorithms of Convolutional Neural Networks(CNN),Recurrent Neural Networks(RNN)and Generative Adversarial Networks(GAN),has been widely studied and applied in various fields including *** in the fields of agriculture often use software frameworks without sufficiently examining the ideas and mechanisms of a *** article provides a concise summary of major DL algorithms,including concepts,limitations,implementation,training processes,and example codes,to help researchers in agriculture to gain a holistic picture of major DL techniques *** on DL applications in agriculture is summarized and analyzed,and future opportunities are discussed in this paper,which is expected to help researchers in agriculture to better understand DL algorithms and learn major DL techniques quickly,and further to facilitate data analysis,enhance related research in agriculture,and thus promote DL applications effectively.

关键词： deep learning smart agriculture neural network convolutional neural networks recurrent neural networks generative adversarial networks artificial intelligence image processing pattern recognition

Huoxue Jiedu Huayu recipe(活血解毒化瘀方)alleviates contralateral renal fibrosis in unilateral ureteral obstruction rats by inhibiting the transformation of macrophages to myofibroblast

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 Traditional Chinese Medicine 2023年第1期43卷 105-112页

作者： XIONG Yunzhao liu Lingjin liu ziqian CHEN Gege HAO Juan GAO Xiaomeng QIANG Panpan WANG Zheng XU Qingyou Graduate School Hebei University of Chinese MedicineHebei Key Laboratory of Integrative Medicine on Liver-Kidney PatternsHebei University of Chinese MedicineHebei University of Chinese MedicineShijiazhuang 050091China Graduate School Hebei University of Chinese Medicine Hebei Key Laboratory of Integrative Medicine on Liver-Kidney PatternsHebei University of Chinese MedicineShijiazhuang 050091China Graduate School Hebei University of Chinese MedicineHebei Key Laboratory of Integrative Medicine on Liver-Kidney PatternsHebei University of Chinese MedicineDepartment of Internal MedicineHebei University of Chinese MedicineShijiazhuang 050091China

OBJECTIVE:To investigate the action and underlying mechanisms of Huoxue Jiedu Huayu recipe(活血解毒化瘀方,HJHR)against unilateral ureteral obstruction(UUO)-induced injury in the contralateral ***:Forty-eight male Sprague-Dawley rats weighing(200±10)g were used in this study and randomly assigned to 4 groups:a sham group,a UUO group,a UUO+eplerenone(EPL)group,and a UUO+HJHR *** contralateral kidneys were harvested for further study 180 d after *** analysis,immunohistochemistry and immunofluorescence were used to study the fibrosis of the contralateral kidneys obtained from UUO *** kidney damagerelated pathway proteins were detected by real-time polymerase chain reaction and Western blot ***:HJHR significantly inhibited fibrosis of the contralateral kidney in UUO rats by attenuating the UUOinduced macrophage-to-myofibroblast transition(MMT)in the contralateral ***,HJHR attenuated fibrosis in the contralateral kidney of UUO rats by preventing MMT through the aldosterone/mineralocorticoid receptor/serum/glucocorticoid regulated kinase 1 ***:Our findings suggest that HJHR may be a potential treatment for renal interstitial fibrosis of obstructive nephropathy.

关键词： ureteral obstruction renal fibrosis aldosterone receptors,mineralocorticoid macrophages myofibroblast Huoxue Jiedu Huayu recipe

在线全文

学校读者我要写书评

暂无评论

玉屏风散加味治疗上呼吸道易感儿童30例

陕西中医 2005年第10期26卷 1032-1033页

作者：刘自谦河北省复员军人医院 054000

目的观察传统名方防治上呼吸道易感儿童的疗效。方法采用玉屏风散加味(黄芪、白术、茯苓、防风、藿香、甘草等)治疗本病30例,并设西药病毒唑对照观察23例。结果治疗组总有效率96.6%,对照组60.8%,P<0.05。结论本方有补益肺脾,实卫祛邪的... 详细信息

目的观察传统名方防治上呼吸道易感儿童的疗效。方法采用玉屏风散加味(黄芪、白术、茯苓、防风、藿香、甘草等)治疗本病30例,并设西药病毒唑对照观察23例。结果治疗组总有效率96.6%,对照组60.8%,P<0.05。结论本方有补益肺脾,实卫祛邪的功效。

关键词：呼吸道感染/中医药疗法儿童玉屏风散/治疗应用玉屏风散加味易感儿童上呼吸道加味治疗对照观察总有效率病毒唑

基于链路生命期的光数据中心网络业务恢复方案

在线全文

学校读者我要写书评

暂无评论

通信学报 2018年第8期39卷 125-132页

作者：鲍宁海袁园刘自谦匡明重庆邮电大学通信与信息工程学院重庆400065

针对大规模灾难事件对光数据中心网络造成的关联性和级联性故障,提出一种基于链路生命期的灾后业务恢复方案。该方案利用全局业务带宽退让和局部链路的有限生命期,缓解灾后网络的带宽资源危机,根据灾难损毁业务的带宽需求和持续时间需求... 详细信息

针对大规模灾难事件对光数据中心网络造成的关联性和级联性故障,提出一种基于链路生命期的灾后业务恢复方案。该方案利用全局业务带宽退让和局部链路的有限生命期,缓解灾后网络的带宽资源危机,根据灾难损毁业务的带宽需求和持续时间需求,确定业务恢复优先级,采用任播与多播相结合的路由策略提高业务的连通性和带宽资源利用率。仿真结果表明,所提方案能够最大限度地降低业务中断率,并有效地延长灾难损毁业务的持续时间,减少数据流量损失。

关键词：光数据中心网络链路生命期网络生存性业务恢复业务持续时间

微型化显微成像系统的关键技术及研究进展(特邀)

在线全文

学校读者我要写书评

暂无评论

激光与光电子学进展 2024年第2期61卷 144-161页

作者：刘晓宇刘紫千斯科龚薇浙江大学光电科学与工程学院浙江杭州310027 浙江大学脑科学与脑医学学院浙江杭州310058 浙江大学教育部脑与脑机融合前沿科学中心浙江杭州310058

神经环路动态功能的解析是当前脑科学领域的重点和难点,微型化显微成像技术为其研究提供了重要手段。相较于双光子荧光成像和光纤光度法,微型化显微系统能够在模式动物自由活动状态下进行长时程、单细胞分辨率、实时成像。近十几年来,... 详细信息

神经环路动态功能的解析是当前脑科学领域的重点和难点,微型化显微成像技术为其研究提供了重要手段。相较于双光子荧光成像和光纤光度法,微型化显微系统能够在模式动物自由活动状态下进行长时程、单细胞分辨率、实时成像。近十几年来,科学家们围绕可穿戴、高稳定性要求,先后研制了单光子、多光子成像系统,并从荧光探针、光电子元件、数据传输等方面进行不断优化,提升系统性能,扩展应用范围。将从成像原理、基本结构、系统优化、应用方案及未来发展方向等方面对微型化显微成像系统进行分析和讨论,综述各方向研究进展,旨在为该领域技术提升和神经科学应用提供参考。

关键词：微型化显微成像单光子微型化显微镜多光子微型化显微镜活体荧光成像单细胞分辨精度