检索结果-南通市图书馆

Chinese Chemical Letters 2023年第5期34卷 365-368页

作者： Pin Hao xu Dong Houguang Wen ruirui xu Junfeng Xie Qian Wang Guanwei Cui Jian Tian Bo Tang College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongKey Laboratory of Molecular and Nano ProbesMinistry of EducationShandong Provincial Key Laboratory of Clean Production of Fine ChemicalsShandong Normal UniversityJi'nan 250014China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China

In this work,we fabricated an efficient pre-catalyst based on(Ni,Co)S2solid solution with hierarchical architecture and high porosity to boost urea oxidation reaction and electrocatalytic oxidation of organic small molecules.The interaction between Ni and Co can optimize the electronic structure,resulting in the improved conductivity and accelerated charge transfer rate.The 2D/3D architecture can enrich more active species and endow the mass and electron transport to facilitate the surface oxidation and the following catalytic process.Post-structure and catalytic characterizations confirm the surface oxidation of(Ni,Co)S_(2)during the stability test,and the in-situ formed Co(Ni)based(oxy)hydroxides exhibit superior catalytic activity and facilitated charge transfer ability.As a result,the optimal(Ni,Co)S_(2)solid solution pre-catalyst displays facilitated catalytic behavior and good stability for multifunctional electrocatalytic oxidation,in which a high conversion of benzyl alcohol(97.50%),a good selectivity to benzoic acid(93.78%)and a satisfied faraday efficiency(91.86%)can be achieved.

关键词： Electrocatalytic oxidation (Ni Co)S_(2)solid solution Pre-catalyst Urea oxidation reaction 2D/3D architecture

What kind of optical model potentials should be used for deuteron stripping reactions?

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 64-70页

作者： XiaoYan Yun DanYang Pang YiPing xu Zhi Zhang ruirui xu ZhongYu Ma CenXi Yuan Yuan51School of Physics Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 100191China China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China China Institute of Atomic Energy Beijing 102413China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

This paper presents the results of a study that compares CTOM, a microscopic optical model potential(OMP), which is an optical model co-created by the China Nuclear Data Center & Tuebingen University, to CH89, which is a typical phenomenological OMP.The respective OMPs were tested by applying them to the modelling of nucleon elastic scattering and(d,p) transfer reactions involving14C,36S, and58Ni targets at both low and relatively high energies. The results demonstrated that although both potentials successfully accounted for the angular distributions of both the elastic scattering and transfer cross sections, the absolute values of the transfer cross sections calculated using CTOM were approximately 25% larger than those calculated using CH89. This increased transfer cross sections allowed CTOM to produce single particle strength reduction factors for the three reactions that were consistent with those extracted from(e,e′p) reactions as well as with more recent(p,2p) and(p,pn) reactions. Notch tests suggested that nucleon elastic scattering and transfer reactions are sensitive to different regions of the OMP;accordingly,phenomenological OMPs, which are constrained only by elastic scattering cross sections, may not be sufficient for nucleon transfer reactions. Therefore, we suggest that microscopic OMPs, which reflect more theoretical considerations, should be preferred over phenomenological ones in calculations of direct nuclear reactions.

关键词： optical model potentials elastic scattering transfer reactions spectroscopic factors

医务人员对老年头颈癌患者实施术前预立医疗照护计划的观点:Q方法

在线全文

学校读者我要写书评

暂无评论

International Journal of Nursing Sciences 2024年第2期11卷 162-170,I0001页

作者：杨慧贤段睿睿丁永霞徐晶田艳芝 School of Nursing Shanxi Medical UniversityTaiyuanChina

目的调查头颈外科医务人员对老年头颈癌手术患者术前实施预立医疗照护计划的观点。方法采用Q方法,结合量性和质性方法探索和分析参与者的态度。参与者对半结构式访谈和文献综述产生的35个Q陈述进行排序,并在后续的半结构式访谈中解释排... 详细信息

目的调查头颈外科医务人员对老年头颈癌手术患者术前实施预立医疗照护计划的观点。方法采用Q方法,结合量性和质性方法探索和分析参与者的态度。参与者对半结构式访谈和文献综述产生的35个Q陈述进行排序,并在后续的半结构式访谈中解释排序原因,分析数据形成因子序列以说明参与者的观点。结果共有15名医务人员参与本研究,包括8名医生和7名护士。医务人员对术前实施预立医疗照护计划的观点各不相同,分为3类:维护患者的自主权,患者的知识和传统文化背景影响术前实施预立医疗照护计划,缺乏实施术前预立医疗照护计划的信心。结论尽管本研究中头颈外科医护人员能够认识到术前讨论预立医疗照护计划的益处,但患者认知水平的限制、传统文化价值观、医护人员能力不足及相关法律和政策不健全等因素导致这些医护人员对术前咨询和与患者讨论预立医疗照护计划存有疑虑。未来的研究应探讨克服术前预立医疗照护计划讨论障碍的策略。

关键词：老年人预立医疗照护计划手术头颈癌安宁疗护

A study of U-isotope ground state properties with covariant energy density functional

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第6期48卷 130-135页

作者：王俊辰田源续瑞瑞崔莹陶曦孙小东张智张玥韩银录葛智刚舒能川 China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China China Institute of Atomic Energy Beijing 102413China

In this study,we systematically analyzed the ground state of uranium isotopes from 225 to 240.In our calculations,we used the covariant energy density functional of density-dependent meson exchange interaction(DDME2)with separable pairing interaction(TMR).Using the multiple deformation constraint,we calculated the potential energy surface(PES)of the uranium isotopes for both even-even and even-odd nuclei with quadrupole and octupole deformation.Based on our calculation and upon comparing the experimental data and Hartree-Fock-Bogoliubov calculations with Gogny D1S calculation data,the ground state of uranium isotopes with reflection-asymmetric deformation was found to be preferred.

关键词： relativistic mean field density functional theory octupole deformation

基于Q方法的老年头颈癌患者术前预立医疗照护计划决策态度探究

在线全文

学校读者我要写书评

暂无评论

护理学杂志 2024年第10期39卷 6-11页

作者：杨慧贤徐晋霞徐晶段睿睿田艳芝丁永霞山西医科大学护理学院山西太原030001 山西省肿瘤医院手术室

目的分析老年头颈癌患者对术前预立医疗照护计划决策态度,为老年头颈癌患者术前预立医疗照护计划干预模式的构建提供参考。方法对13例老年头颈癌患者进行半结构访谈,并在文献回顾基础上生成Q陈述,总结、整理后编号并随机排列以备用;另选... 详细信息

目的分析老年头颈癌患者对术前预立医疗照护计划决策态度,为老年头颈癌患者术前预立医疗照护计划干预模式的构建提供参考。方法对13例老年头颈癌患者进行半结构访谈,并在文献回顾基础上生成Q陈述,总结、整理后编号并随机排列以备用;另选取18例老年头颈癌患者按Q方法对Q陈述进行排序,对所得数据进行因子分析,以明确患者的决策态度。结果共提取3个因子,老年头颈癌患者对术前预立医疗照护计划的决策态度类型可分为3种,即共同决策型、专业决策型、自主决策型,3种类型患者均认为应在术前进行预立医疗照护计划讨论,均不认为手术前讨论此话题是不吉利或不孝的,3种类型间也存在一定差异。结论术前与老年头颈癌患者进行预立医疗照护计划讨论具有一定可行性,其参与术前预立医疗照护计划决策的态度各有不同,医务人员应甄别患者的不同决策类型,针对性制定术前预立医疗照护计划。

关键词：头颈癌老年患者手术预立医疗照护计划安宁疗护决策态度 Q方法质性研究

在线全文

学校读者我要写书评

暂无评论

产酸克雷伯菌致病性及相关毒力因子研究进展

中华检验医学杂志 2024年第4期47卷 460-465页

作者：吴云马瑞瑞徐英春刘亚丽中国医学科学院北京协和医院研究生院北京100730 中国医学科学院北京协和医院检验科北京100730

产酸克雷伯菌是一种重要条件致病菌,可引起成人、儿童、社区或医院获得性感染。其中,产酸克雷伯菌最常引起的疾病是抗生素相关出血性结肠炎(AAHC)。此外,它还可引起尿路感染、肺部感染、血流感染等疾病。目前,关于产酸克雷伯菌致病相关... 详细信息

产酸克雷伯菌是一种重要条件致病菌,可引起成人、儿童、社区或医院获得性感染。其中,产酸克雷伯菌最常引起的疾病是抗生素相关出血性结肠炎(AAHC)。此外,它还可引起尿路感染、肺部感染、血流感染等疾病。目前,关于产酸克雷伯菌致病相关的机制研究较少,其中较为明确的有产细胞毒素Tilivalline和Tilimycin,作为产酸克雷伯菌重要的毒力因子,可导致AAHC的发生。考虑到国内关于产酸克雷伯菌的研究较少,本文就产酸克雷伯菌的流行率、致病性及其相关机制进行了综述,希望能提高大家对产酸克雷伯菌的认识,并为疾病预防和治疗提供指导。

关键词：克雷伯菌产酸抗生素相关出血性结肠炎细胞毒素类致病性毒力因子类

在线全文

学校读者我要写书评

暂无评论

单味中药提取物治疗银屑病作用机制探究

中国中医药图书情报杂志 2024年第3期48卷 259-261页

作者：许飞李锐锐刘婕凤阳县人民医院安徽凤阳233100

银屑病是常见慢性炎症性皮肤疾病,又称“牛皮癣”,临床多以药物、光疗及生物制剂等治疗。中医药治疗银屑病具有明显优势,本文综述单味中药提取物治疗银屑病作用机制,以期为银屑病临床治疗提供思路。

关键词：单味中药提取物银屑病药物作用机制综述

补料比及反冲推头倾角对Y型管内高压成形质量的影响研究

在线全文

学校读者我要写书评

暂无评论

精密成形工程 2024年第5期16卷 149-155页

作者：袁姣郭全庆王忠健贺锐睿徐雪峰谢君中航西安飞机工业集团股份有限公司西安710089 南昌航空大学航空制造工程学院南昌330063 南昌航空大学工程训练中心南昌330063

目的解决5A02铝合金Y型管在内高压成形过程中易出现破裂和内凹缺陷的问题,以获得最佳成形质量的管件,对成形中的补料比和反冲推头倾角进行研究。方法使用内高压成形机进行实验,分析了管件的表面质量、管件壁厚分布情况,研究了补料比和... 详细信息

目的解决5A02铝合金Y型管在内高压成形过程中易出现破裂和内凹缺陷的问题,以获得最佳成形质量的管件,对成形中的补料比和反冲推头倾角进行研究。方法使用内高压成形机进行实验,分析了管件的表面质量、管件壁厚分布情况,研究了补料比和反冲推头倾角对Y型管成形质量的影响。选取端面倾角大小分别为0°、13.5°、27°的反冲推头进行实验,设计了1.5∶1、2∶1、2.5∶1和3∶14组补料比进行对比分析。结果比较3种不同反冲推头成形得到的管件,通过对支管成形效果的分析,确定13.5°为最佳反冲推头倾角;补料比在1.5~2.5时可成形出Y型管,补料比为2∶1时,Y型管成形质量最好。为获得成形质量高的Y型管,需选择补料比为2∶1的加载路径和端面倾角为13.5°的反冲推头进行实验。结论采用合适的反冲推头端面倾角,既可以使Y型管获得理想高度的支管,又可有效地抑制成形中期支管出现的破裂缺陷;选择合理的补料比可以避免过渡圆角内凹缺陷,也可以改善Y型管的壁厚分布情况,进一步提升管件最终的成形质量。

关键词：内高压成形 Y型管 5A02铝合金补料比反冲推头倾角

Inner Co Synergizing Outer Ru Supported on Carbon Nanotubes for Efficient pH-Universal Hydrogen Evolution Catalysis

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

Nano-Micro Letters 2022年第11期14卷 275-289页

作者： Jian Chen Yuan Ha ruirui Wang Yanxia Liu Hongbin xu Bin Shang Renbing Wu Hongge Pan Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an 710021People’s Republic of China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126People’s Republic of China Department of Materials Science Fudan UniversityShanghai 200433People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430073People’s Republic of China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027People’s Republic of China

Exploring highly active but inexpensive electrocatalysts for the hydrogen evolution reaction(HER)is of critical importance for hydrogen production from electrochemical water splitting.Herein,we report a multicomponent catalyst with exceptional activity and durability for HER,in which cobalt nanoparticles were in-situ confined inside bamboo-like carbon nanotubes(CNTs)while ultralow ruthenium loading(~2.6μg per electrode area~cm^(−2))is uniformly deposited on their exterior walls(Co@CNTsǀRu).The atomic-scale structural investigations and theoretical calculations indicate that the confined inner Co and loaded outer Ru would induce charge redistribution and a synergistic electron coupling,not only optimizing the adsorption energy of H intermediates(ΔGH*)but also facilitating the electron/mass transfer.The as-developed Co@CNTsǀRu composite catalyst requires overpotentials of only 10,32,and 63 mV to afford a current density of 10 mA cm^(−2) in alkaline,acidic and neutral media,respectively,representing top-level catalytic activity among all reported HER catalysts.The current work may open a new insight into the rational design of carbon-supported metal catalysts for practical applications.

关键词： Cobalt nanoparticles Carbon nanotubes Ru nanoclusters Hydrogen evolution reaction

考虑利益主体协调的配电网分布式光伏控制策略

在线全文

学校读者我要写书评

暂无评论

供用电 2024年第5期41卷 88-95,102页

作者：谢芮芮周昊尚博文宋宇飞徐铭铭国网河南省电力公司电力科学研究院河南郑州450052 西安交通大学电气工程学院陕西西安710049

随着分布式光伏在配电网中渗透率的不断提高,电源类型的多样化以及供电方式的改变给配电网电压控制带来了新的挑战。尤其是分布式光伏出力波动带来的不确定性,使得传统电压控制方法已不再完全适用。在大规模光伏并网过程中,配电网和光... 详细信息

随着分布式光伏在配电网中渗透率的不断提高,电源类型的多样化以及供电方式的改变给配电网电压控制带来了新的挑战。尤其是分布式光伏出力波动带来的不确定性,使得传统电压控制方法已不再完全适用。在大规模光伏并网过程中,配电网和光伏用户之间的利益发生冲突,一方面为提高光伏的消纳率进行无功调压会增大网损,另一方面盲目切除光伏会使光伏用户的利益受损。基于上述问题,提出了一种考虑利益主体协调的配电网光伏控制策略。该方法通过建立不确定集合,将光伏出力波动和日前负荷预测曲线误差带来的不确定性纳入考虑,以配电网安全稳定运行约束为基础,建立鲁棒电压控制模型。在解决电压越限问题的同时,通过光伏的有功无功协调控制,达到均衡配电网和光伏用户之间利益的目的。并利用IEEE 33节点系统进行算例分析,验证了所提方法的鲁棒性和有效性。

关键词：分布式光伏电压控制鲁棒优化无功调压利益协调