检索结果-南通市图书馆

Journal of Materials Science & Technology 2023年第16期147卷 16-25页

作者： xinmeng huang Xuehua Liu Yan Zhang Jixi Zhou Guanglei Wu Zirui Jia Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

In this work,two-dimensional NiCeOx nanosheet-modified carbon nanotubes(CNTs)composites were prepared by a hydrothermal *** with different morphologies can be formed by adjusting the addition ratio of nickel salt and cerium salt,and the introduction of CNTs in the subsequent synthesis process can effectively prevent the aggregation of NiCeOx *** studies show that hexagonal NiCeOx nanosheets with a size of 100 nm are uniformly intertwined with *** applied to the attenuation of electromagnetic waves,NiCeOx/CNTs composites exhibit better electromagnetic wave(EMW)absorption performance than pure CNTs and NiCeOx nanosheets due to improved impedance matching and multiple polarization *** the matching thickness of 1.9 mm,the composite exhibits a minimum reflection loss(RL_(min))of–53.2 dB and an effective absorption bandwidth(RL<–10 dB)of 5.04 GHz with a thickness of 2.3 *** results indicate that the as-prepared NiCeOx/CNTs composites have excellent EMW absorption performance and are expected to be a candidate material for EMW absorption.

关键词： NiCeOx nanosheets Carbon nanotubes Dipole polarization Impedance matching Electromagnetic wave absorption

Polymorphic cerium-based Prussian blue derivatives with in situ growing CNT/Co heterojunctions for enhanced microwave absorption via polarization and magnetization

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

Nano Research 2024年第3期17卷 2050-2060页

作者： Jixi Zhou xinmeng huang Di Lan Yuhang Cheng Fengyi Xue Chenyu Jia Guanglei Wu Zirui Jia Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

In this paper,the structure evolution of cerium cobaltohexanoate(Ce[Co(CN)6],Ce-Co Prussian blue analog(PBA))has been realized by solvent catalysis at room *** hexagonal bipyramidal microcrystals of Ce-Co PBA can be gradually transformed into dendrites by different proportions of ethanol(EtOH)and *** the same time,the porous dendrites CeO_(2)/Co@carbon nanotub(CNT)with oxygen-rich vacancies(OVs)can be obtained by annealing Ce-Co PBA at 700℃.The microstructure study shows that carbon nanotubes will be catalyzed after annealing at high temperature,and the cobalt metal particles encapsulated in carbon nanotubes will be anchored in the matrix,regulating the impedance matching and multi-polarization suppression of the material,and its unique structure,vacancies,and strong interface effect make the material exhibit excellent electromagnetic wave(EMW)absorption *** the matching thickness is 2.5 mm,the minimum reflection loss(RLmin)of the composite is-51.68 dB,and the effective absorption bandwidth(RL<-10 dB)is 7.76 *** results show that the prepared CeO_(2)/Co@CNT composite has excellent EMW absorption *** is expected to be a candidate material for EMW absorption.

关键词： Ce-Co Prussian blue analog(PBA) carbon nanotubes(CNTs) CeO_(2)/Co@CNT solvent catalysis electromagnetic wave absorption

Reverse modulation of defect density of Ce-MOF-808 by solventassisted ligand exchange for dicyclopentadiene hydrogenation

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

Science China Chemistry 2025年

作者： Danfeng Zhao Fajie Hu Rushuo Li xinmeng Xu Zhaokun Wang Zuoshuai Xi Jun Tong Xiubing huang Ge Wang Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule & Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing

Defect engineering is a pivotal strategy for tailoring the electronic structure and physicochemical properties of catalysts, yet the straightforward manipulation of defect density in porous materials presents a current challenge. In this work, we achieved precise control over the coordination unsaturated site（CUS） content and pore architecture of Ce-MOF-808 by employing 2-fluorobenzoic acid（2-FBA） as a modifier. Leveraging the p Kadisparities among three ligands（1,3,5-tricarboxylic benzoic acid,formic acid, and 2-FBA）, we preserved the spn topology of Ce-MOF within an aqueous system, while realizing partial substitution of the auxiliary ligands and saturation of the CUS. The amount of 2-FBA was negatively correlated with the number of ligand defects, and the consequent decrease in Ce3+content and the increase in the number of ligand linkages also induced crystal structure transformation. The modulation of the defect structure was correlated with the catalytic performance of dicyclopentadiene（DCPD） hydrogenation reaction, in which Ce-MMF0.15, constructed by the modulation of 0.15 mol amount of 2-fluorobenzoic acid, exhibited an optimal ligand defect density and micro-mesoporous structure, enabling almost complete conversion of DCPD at 100 ℃ and 2 MPa. This article also elucidates the correlation between the regulation of defect density and the accessibility of frustrated Lewis pair（FLP） active sites, guiding the application of novel porous intrinsic FLP materials in hydrogenation catalysis.

关键词：

网络化产业竞争背景下矿业企业资源账户体系的构建

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

金属矿山 2012年第10期41卷 51-54页

作者：冯茜颖黄薪萌成都理工大学商学院四川省科学技术信息研究所

网络化产业竞争背景下,矿业企业的边界得以延伸,资源概念得以拓展,竞争优势的获取来源于对资源的整合力度。在对矿业企业资源进行识别和分类的基础上,构建矿业企业资源整合模型,并依据会计账户设置的思想,建立矿业企业资源账户体系,旨... 详细信息

网络化产业竞争背景下,矿业企业的边界得以延伸,资源概念得以拓展,竞争优势的获取来源于对资源的整合力度。在对矿业企业资源进行识别和分类的基础上,构建矿业企业资源整合模型,并依据会计账户设置的思想,建立矿业企业资源账户体系,旨在引导矿业企业资源整合过程,提升矿业企业核心竞争力,促进矿业企业可持续发展。

关键词：网络化产业竞争矿业企业资源账户体系

基于网络生态系统的淘宝村现象研究--以山东肥城为例

在线全文

学校读者我要写书评

暂无评论

中国商论 2022年第4期 57-59页

作者：刘艺辛怡然黄歆萌刘喜中国农业大学烟台研究院山东烟台264670

在科技和信息技术的快速发展下,网络电商的发展越来越迅速。同时,在政府的大力扶持下,“互联网+农村”的发展模式也逐渐流行起来,其发展过程伴随着电子商务平台的发展,也产生了以淘宝村为代表的新型商务模式的出现和发展。淘宝村通过线... 详细信息

在科技和信息技术的快速发展下,网络电商的发展越来越迅速。同时,在政府的大力扶持下,“互联网+农村”的发展模式也逐渐流行起来,其发展过程伴随着电子商务平台的发展,也产生了以淘宝村为代表的新型商务模式的出现和发展。淘宝村通过线上线下的联动使得大量村民参与到生产活动,由信息技术带动了线下产业发展。

关键词：淘宝村网络生态系统肥城电商集群效应

区域产业技术研究院运行绩效评价指标体系研究

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

中国科技资源导刊 2016年第5期48卷 6-12页

作者：黄薪萌李亚丹陈磊张娟娟程劲高力四川省科学技术信息研究所四川成都610016

在国内外研究成果的基础上,从创新资源整合、体制机制创新、"五位一体"功能实现、财政资金管理四个维度构建了区域产业技术研究院运行绩效评价指标体系。采用逼近理想点法确定各指标权重,建立了区域产业技术研究院运行绩效评价模型。以... 详细信息

在国内外研究成果的基础上,从创新资源整合、体制机制创新、"五位一体"功能实现、财政资金管理四个维度构建了区域产业技术研究院运行绩效评价指标体系。采用逼近理想点法确定各指标权重,建立了区域产业技术研究院运行绩效评价模型。以四川省首批10家省级产业技术研究院为例,运用问卷调查数据和专家评价数据对所构建的评价指标体系及其权重确定方法的有效性与可靠性进行了验证,为区域产业技术研究院运行绩效评价与管理提供了理论方法与操作参考。

关键词：产业技术研究院绩效评价指标体系问卷调查专家评价

SnO/SnO_(2) heterojunction:an alternative candidate for sensing NO_(2) with fast response at room temperature

在线全文

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2022年第3期16卷 193-202页

作者： Pengtao WANG Wanyin GE Xiaohua JIA Jingtao huang xinmeng ZHANG Jing LU School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an 710021China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The SnO_(2)-based family is a traditional but important gas-sensitive ***,the requirement for high working temperature limits its practical *** work has been done to explore ways to improve its gas-sensing performance at room temperature(RT).For this report,SnO_(2),SnO,and SnO/SnO_(2) heterojunction was successfully synthesized by a facile hydrothermal combined with subsequent *** SnO_(2) requires a high operating temperature(145℃),while SnO/SnO_(2) heterojunction exhibits an excellent performance for sensing NO_(2) at ***,SnO/SnO_(2) exhibits a fast response,of 32 s,to 50 ppm NO_(2) at RT(27℃),which is much faster than that of SnO(139 s).The superior sensing properties of SnO/SnO_(2) heterojunction are attributed to the unique hierarchical structures,large number of adsorption sites,and enhanced electron *** results show that SnO/SnO_(2) heterojunction can be used as a promising high-performance NO_(2) sensitive material at RT.

关键词： SnO SnO_(2) heterostructure NO_(2) roomtemperature

同方期刊数据库

Clinical factors associated with composition of lung microbiota and important taxa predicting clinical prognosis in patients with severe community-acquired pneumonia

在线全文

学校读者我要写书评

暂无评论

Frontiers of Medicine 2022年第3期16卷 389-402页

作者： Sisi Du Xiaojing Wu Binbin Li Yimin Wang Lianhan Shang Xu huang Yudi Xia Donghao Yu Naicong Lu Zhibo Liu Chunlei Wang xinmeng Liu Zhujia Xiong Xiaohui Zou Binghuai Lu Yingmei Liu Qingyuan Zhan Bin Cao China-Japan Friendship Hospital National Clinical Research Center for Respiratory DiseasesNational Center for Respiratory MedicineClinical Center for Pulmonary InfectionsCapital Medical UniversityBeijing 100029China Institute of Respiratory Medicine Chinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100029China Department of Pulmonary and Critical Care Medicine Center for Respiratory DiseasesChina-Japan Friendship HospitalBeijing 100029China Beijing University of Chinese Medicine Beijing 100029China Beijing Luhe Hospital Beijing 101100China Tsinghua University–Peking University Joint Center for Life Sciences Beijing 100084China

Few studies have described the key features and prognostic roles of lung microbiota in patients with severe community-acquired pneumonia(SCAP).We prospectively enrolled consecutive SCAP patients admitted to *** was performed at bedside within 48 h of ICU admission,and 16S rRNA gene sequencing was applied to the collected bronchoalveolar lavage *** primary outcome was clinical improvements defined as a decrease of 2 categories and above on a 7-category ordinal scale within 14 days following ***-seven patients were *** permutational multivariate analysis of variance found that positive bacteria lab test results had the strongest independent association with lung microbiota(R2=0.033;P=0.018),followed by acute kidney injury(AKI;R2=0.032;P=0.011)and plasma MIP-1βlevel(R2=0.027;P=0.044).Random forest identified that the families Prevotellaceae,Moraxellaceae,and Staphylococcaceae were the biomarkers related to the positive bacteria lab test *** Cox regression showed that the increase inα-diversity and the abundance of the families Prevotellaceae and Actinomycetaceae were associated with clinical *** positive bacteria lab test results,AKI,and plasma MIP-1βlevel were associated with patients’lung microbiota composition on ICU *** families Prevotellaceae and Actinomycetaceae on admission predicted clinical improvements.

关键词： severe community-acquired pneumonia lung microbiota clinical improvements 7-category ordinal scale Prevotellaceae

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

一种基于信标控制的安全通信机制及其应用

计算机工程与应用 2001年第14期37卷 123-125页

作者：黄传河陈莘萌武汉大学计算机科学系武汉430072

提出了一种以信标控制为基础、基于ＴＣＰ／ＩＰ协议的、用于Ｉｎｔｅｒｎｅｔ上证券交易的安全通信机制，可以实现保密与认证，具有防伪造、防重放、防抵赖功能。

关键词：加密认证信标

基于三维漏磁场信号的储罐底板水平凹槽形缺陷量化方法研究

在线全文

学校读者我要写书评

暂无评论

电测与仪表 2015年第12期52卷 1-6,17页

作者：刘新萌赵伟黄松岭清华大学电机系电力系统及发电设备控制和仿真国家重点实验室北京100084

针对油气储罐底板上可能存在的水平凹槽形缺陷,采用漏磁检测技术实施测量,提出了基于贝叶斯算法的BP神经网络缺陷量化方法。方法将贝叶斯算法引入BP神经网络基本架构中,控制网络复杂度并优化网络参数,从而建立了缺陷漏磁场信号与缺陷长... 详细信息

针对油气储罐底板上可能存在的水平凹槽形缺陷,采用漏磁检测技术实施测量,提出了基于贝叶斯算法的BP神经网络缺陷量化方法。方法将贝叶斯算法引入BP神经网络基本架构中,控制网络复杂度并优化网络参数,从而建立了缺陷漏磁场信号与缺陷长度、宽度、深度的映射关系,且使缺陷量化方法可节约网络计算时间之同时,还提高了对水平凹槽形缺陷的量化精度。为获取更多的缺陷信息,采用三维漏磁场信号对水平凹槽形缺陷进行量化,进一步提高了对缺陷长度和宽度的量化精度。仿真结果表明,提出的方法在网络训练时间和缺陷量化精度上均具优于已有方法,具有很好的应用优势。

关键词：漏磁检测水平凹槽形缺陷三维漏磁场信号贝叶斯算法 BP神经网络