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护理研究 2024年第14期38卷 2563-2566页

作者：张玲贾家欣刘雯晴李润铎陈如男中国人民解放军海军军医大学上海200433

从儿童的年龄、性别、性格、家庭亲密关系、教养方式、隔代教养与共同养育、家庭完整性、父母的文化程度和职业方面对儿童自立行为的影响因素进行回顾及总结,并指出未来儿童自立行为拓展的研究方向和可能性。

关键词：儿童自立行为影响因素护理综述

Direct observation of hydrogen-trapping sites in newly developed high-strength mooring chain steel by atom probe tomography

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Progress in Natural Science:Materials International 2013年第4期23卷 446-452页

作者： Xiaoying Cheng Zhijuan Zhang wenqing liu Xiaojiao Wang Laboratory for Microstructures Shanghai University Institute of Materials Shanghai University

Hydrogen-trapping sites were directly observed by using a three-dimensional atom probe(3DAP) in high-strength mooring chain *** typical 3DAP datasets show that trapping hydrogen is mainly enriched in retained austenite,and secondarily in *** addition,these interfaces between ferrite and carbide are segregated by phosphorus,but do not admit hydrogen.

关键词： Steel Hydrogen-trapping sites Atom probe tomography High-strength Retained austenite Interfaces

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客户稳定性对企业财务安全性的影响研究

嘉兴大学学报 2024年第5期36卷 102-116页

作者：钟梅支刘文庆林钟高马鞍山学院经济与管理学院安徽马鞍山243000 江西财经大学会计学院江西南昌330000

以2010—2022年沪深A股上市公司为样本,观察客户稳定性是否以及如何影响企业财务安全性。研究发现,客户稳定性与企业财务安全性存在先扬后抑的倒“U”型关系。经内生性与稳健性检验后,结论依然成立。机制检验发现融资约束、盈余管理和... 详细信息

以2010—2022年沪深A股上市公司为样本,观察客户稳定性是否以及如何影响企业财务安全性。研究发现,客户稳定性与企业财务安全性存在先扬后抑的倒“U”型关系。经内生性与稳健性检验后,结论依然成立。机制检验发现融资约束、盈余管理和交易成本在其中发挥部分中介作用。异质性检验发现,在环境不确定性高以及市场竞争较低的情形下,客户稳定性与财务安全性之间的倒“U”型关系更为显著。研究结果提供了关系型交易后果的新证据,丰富了关系交易理论,同时,提供了有关财务安全性的中国企业特征,为企业保持客户关系的适度稳定提供基本指导。

关键词：关系交易专用性投资客户稳定性财务安全性

Nocturnal atmospheric chemistry of NO_(3) and N_(2)O_(5) over Changzhou in the Yangtze River Delta in China

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Journal of Environmental Sciences 2022年第4期34卷 376-390页

作者： Chuan Lin Renzhi Hu Pinhua Xie Shengrong Lou Guoxian Zhang Jinzhao Tong Jianguo liu wenqing liu Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361000China State Environmental Protection Key Laboratory of the Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China

Comprehensive observations of the nocturnal atmospheric oxidation of NO_(3)and N_(2)O_(5)were conducted at a suburban site in Changzhou in the YRD using cavity ring-down spectroscopy(CRDS)from 27 May to 24 June,*** concentrations of NO_(3)precursors were observed,and the nocturnal production rate of NO_(3)was determined to be 1.7±1.2 ppbv/***,the nighttime NO_(3)and N_(2)O_(5)concentrations were relatively low,with maximum values of 17.7 and 304.7 pptv,respectively,illustrating the rapid loss ofNO_(3)andN_(2)O_(5).Itwas found that NO_(3)dominated the nighttime atmospheric oxidation,accounting for 50.7%,whileO3 andOH only contributed 34.1%and 15.2%,*** the reactions of NO_(3)with volatile organic compounds(VOCs),styrenewas found to account for 60.3%,highlighting its dominant role in the NO_(3)*** general,the contributions of the reactions between NO_(3)and VOCs and the N_(2)O_(5)uptake to NO_(3)losswere found to be about 39.5%and 60.5%,respectively,indicating that N_(2)O_(5)uptake also played an important role in the loss of NO_(3)and N_(2)O_(5),especially under the high humidity conditions in *** formation of nitrate at night mainly originated from N_(2)O_(5)uptake,and the maximum production rate of NO_(3)^(-)reached 6.5 ppbv/*** average NOx consumption rate via NO_(3)and N_(2)O_(5)chemistry was found to be 0.4 ppbv/h,accounting for 47.9%of the total NO_(x)*** predominant roles of NO_(3)and N_(2)O_(5)in nitrate formation and NO_(x)removal in the YRD region was highlighted in this study.

关键词： Nitrate radical(NO_(3)) Dinitrogen pentoxide(N_(2)O_(5)) Cavity ring-down spectroscopy(CRDS) Styrene N_(2)O_(5)uptake Nighttime chemistry

Re effects in model Ni-based superalloys investigated with first-principles calculations and atom probe tomography

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Chinese Physics B 2020年第4期29卷 232-241页

作者： Dianwu Wang Chongyu Wang Tao Yu wenqing liu Central Iron and Steel Research Institute Beijing 100081China Department of Physics Tsinghua UniversityBeijing 100084China Key Laboratory for Microstructures Shanghai UniversityShanghai 200444China

The phase partition and site preference of Re atoms in a ternary Ni-Al-Re model alloy,including the electronic structure of different Re configurations,are investigated with first-principles calculations and atom probe *** Re distribution of single,nearest neighbor(NN),next-nearest neighbor(NNN),and cluster configurations are respectively designed in the models withγandγ*** results show that the Re atoms tend to enteringγphase and the Re atoms prefer to occupy the Al sites inγ*** Re cluster with a combination of NN and NNN Re-Re pair configuration is not preferred than the isolated Re atom in the Ni-based superalloys,and the configuration with isolated Re atom is more preferred in the ***,the electronic states are analyzed and the energetic parameters are *** electronic structure analyses show there exists strong Ni-Re electronic interaction and it is mainly contributed by the d-d *** characteristic features of the electronic states of the Re doping effects are also *** is also found that Re atoms prefer the Al sites inγside at the *** density of states at or near the Fermi level and the d-d hybridizations of NN Ni-Re are found to be important in the systems.

关键词： Re distribution first-principles calculations atom probe tomography Ni-based superalloys

Effect of heat treatment on the Nb distribution and corrosion resistance of Zr-Sn-Nb-Fe zirconium alloy

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Rare Metals 2008年第2期27卷 192-196页

作者： liu wenqing GENG Xun liu Qingdong LI Qiang ZHOU Bangxin YAO Meiyi Instrurnental Analysis ＆ Research Center Shanghai University Shanghai 200444 China

After being treated in different ways, Zr-Sn-Nb-Fe alloy specimens are exposed in 0.01mol/L LiOH aqueous solution at 350℃ under 16.8 MPa. The examination of microstructures and second phase particles （SPPs） of these specimens was carried out by high-resolution transmission electron microscopy （HR-TEM）. The specimens treated at 800℃ before the final cold rolling have a better corrosion resistance than those treated at 680℃, and the specimens treated at 500℃, after the final cold rolling, have a better corrosion resistance than those treated at 560℃. TEM examination shows that the SPPs existing in the 800℃/500℃ specimen, which has the best corrosion resistance, contains a lot of Nb element, which results in the reduction of the niobium content in the α-Zr solid solution.

关键词： zircaloy heat treatment corrosion resistance microstructure second phase particles

基于CiteSpace的国内患者安全教育研究现状的文献计量学分析

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循证护理 2024年第9期10卷 1590-1595页

作者：卢小丽杨浩戴永恩刘文清成都京东方医院四川610200

目的:采用CiteSpace软件对我国患者安全教育相关文献进行文献计量学分析,总结该领域研究热点,探索未来发展趋势。方法:检索中国知网建库至2023年7月25日发表的相关文献,使用文献计量学分析方法及CiteSpace软件进行统计分析。结果:共检索... 详细信息

目的:采用CiteSpace软件对我国患者安全教育相关文献进行文献计量学分析,总结该领域研究热点,探索未来发展趋势。方法:检索中国知网建库至2023年7月25日发表的相关文献,使用文献计量学分析方法及CiteSpace软件进行统计分析。结果:共检索出163篇文献,发文量呈现逐年上升的趋势。发文量居前3位的机构分别为重庆医科大学附属第一医院、天津医科大学和华中科技大学同济医学院附属协和医院。研究热点主要包括安全教育、调查、新护士、安全管理、安全文化及医学生6个聚类。影响因素、护士和新护士成为近3年的研究热词,并呈现持续上升趋势。结论:国内患者安全教育的发文量呈现增长趋势,发文机构以高等医学院校及附属医院为主,作者间的合作较弱,鉴于患者安全教育对临床医疗质量与安全的重要性,未来研究者应给予重视,加强机构间的合作与交流,就患者安全教育方案进行深入探讨。

关键词：患者安全教育 CiteSpace软件发文量机构共现分析聚类分析文献计量学

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EDTA对轮叶黑藻体系中砷迁移转化的影响

环境科学与技术 2024年第2期47卷 89-95页

作者：钟彪黄中情宋梦萍曾绍宇刘雯清何发涛杨常亮云南大学国际河流与生态安全研究院云南昆明650091 云南大学生态与环境学院云南昆明650091

该研究以砷污染的湖泊沉积物和轮叶黑藻为研究对象,探讨了乙二胺四乙酸(EDTA)对轮叶黑藻体系中砷迁移转化的影响机制。结果表明:0.5 mg/L EDTA显著促进沉积物中的砷释放到上覆水中。0.5和5.8 mg/L EDTA增强了轮叶黑藻对砷的富集能力,EDT... 详细信息

该研究以砷污染的湖泊沉积物和轮叶黑藻为研究对象,探讨了乙二胺四乙酸(EDTA)对轮叶黑藻体系中砷迁移转化的影响机制。结果表明:0.5 mg/L EDTA显著促进沉积物中的砷释放到上覆水中。0.5和5.8 mg/L EDTA增强了轮叶黑藻对砷的富集能力,EDTA促进植物将砷酸盐[As(Ⅴ)]还原为亚砷酸盐[As(Ⅲ)],提高了植物体内砷的甲基化作用,降低了砷的毒性。5.8 mg/L EDTA介导下,植物保持较高的光合色素、蛋白质和丙二醛含量,以及产生大量的超氧化物歧化酶、过氧化氢酶和还原型谷胱甘肽酶来抵抗砷的胁迫。

关键词：砷乙二胺四乙酸轮叶黑藻迁移与转化

电絮凝-三维电极深度处理油田采出水工艺研究

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油气田环境保护 2024年第4期34卷 15-20页

作者：崔青龙丁海玲刘文青中国石油天然气股份有限公司华北油田分公司中国石油集团安全环保技术研究院有限公司

鉴于电化学工艺具有反应时间短、不添加化学药剂的特点,利用室内实验装置,采用电絮凝+三维电极的组合工艺实现对油田采出水的深度处理。文章通过控制变量法,考察了电极材料、电流密度、初始pH值和极板间距等因素对电絮凝工艺的影响,以... 详细信息

鉴于电化学工艺具有反应时间短、不添加化学药剂的特点,利用室内实验装置,采用电絮凝+三维电极的组合工艺实现对油田采出水的深度处理。文章通过控制变量法,考察了电极材料、电流密度、初始pH值和极板间距等因素对电絮凝工艺的影响,以及活性炭吸附率、电流和初始pH值等因素对三维电极工艺的影响,并监测两种工艺联合的处理效果。结果表明,以铁板为阳极,在电流密度50 mA/cm、初始pH值为8、极板间距40 mm、电解时间40 min的条件下,电絮凝工艺的处理效果最佳;在活性炭填充率90%、初始pH值为8、反应时间40 min的条件下,三维电极工艺的处理效果最佳。5次重复实验结果表明,两种工艺联合处理后的各项指标满足SY/T 5329—2022的注水水质要求。

关键词：电絮凝三维电极采出水化学需氧量处理效果

Effect of spectral resolution on the measurement of monoaromatic hydrocarbons by DOAS

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Journal of Environmental Sciences 2008年第5期20卷 632-640页

作者： PENG Fumin XIE Pinhua ZHANG Yinghua ZHU Yanwu SI Fuqi liu wenqing WANG Junde Key Laboratory of Environmental Optical and Technology Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 China College of Chemistry and Chemical Engineering Anhui University Hefei 230039 China Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

The excellent response characteristics and detection sensitivity with much lower operational cost and the capability to discriminate between the isomer of some monoaromatic hydrocarbons （MAHCs） make differential optical absorption spectroscopy （DOAS） a powerful tool to trace concentration variation of MAHCs. But due to the similarity in chemical structure, those MAHCs have the similar overlapped characteristic absorption structures, which make the selection of instrumental parameter critical to the accurate detection of MAHCs. Firstly, the spectral resolution used in DOAS system determines the nonlinear absorption of O2 and the mass dependence of characteristic absorption structure; thereby it determines the effect of elimination error of O2 absorption in the atmospheric spectra for the detection of MAHCs. Secondly, spectral resolution determines the differential absorption characteristics of twelve MAHCs representing major constituents in technical solvents used in the automobile industry and the interference of spectral overlapping. Thirdly, the spectral resolution determines the sensitivity, time resolution and linear range. So the spectral resolution range with the best ratio of signal to noise is used to determine the most suitable spectral resolution range, as well as the spectral resolution range that ensure the characteristic absorption structure of MAHCs and the minimization of O2 absorption interference. Finally, 0.15-0.16 nm （FWHM： full width at half maximum） is assumed to be closest to the optimum spectral resolution and it is confirmed by the results of practical measurement of MAHCs by DOAS.

关键词： differential optical absorption spectroscopy (DOAS) monoaromatic hydrocarbons (MAHCs) spectral resolution characteristic absorption structure