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Origin and effect of surface oxygen-containing species on electrochemical CO or CO_(2) reduction reactions

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Science China Chemistry 2023年第1期66卷 96-106页

作者： xiaoxia chang Ming He Qi Lu Bingjun Xu College of Chemistry and Molecular Engineering Peking UniversityBejing 100871China Department of Chemical Engineering Tsinghua UniversityBejing 100084China

Renewable-energy-powered electrochemical CO or CO_(2)reduction reactions(CO_(2)RR)provide one of the most promising strategies to upgrade CO_(2)to valuable *** the past decade,the existence and the mechanistic role of oxygen-containing species,such as(sub)surface oxide,hydroxide and oxyhydroxide species,at the electrode–electrolyte interface under reductive conditions have emerged as a topic of acute discussion within the CO_(2)RR ***-derived Cu attracted the most attention,while other surfaces,including Au,Ag and Sn,were also widely *** review identifies likely causes for contrasting results and views in the literature,summarizes possible oxygen sources for the interfacial oxygen-containing species at the CO_(2)RR conditions,and discusses potential roles these species could play in affecting the rate and product ***,perspectives on future efforts to reveal the identity and role of oxygen-containing species in the CO_(2)RR are presented.

关键词： electrochemical CO_(2)reduction surface oxygen-containing species copper-based catalysts

产后压力性尿失禁患者盆底超声参数分析及影响因素探讨

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安徽医学 2024年第2期45卷 152-157页

作者：郑志燕徐伟唐文成冯小凤常小霞葛环安徽医科大学附属滁州医院/滁州第一人民医院超声科安徽滁州239200 安徽医科大学附属滁州医院/滁州第一人民医院影像科安徽滁州239200 安徽医科大学附属滁州医院/滁州第一人民医院妇产科安徽滁州239200 南京医科大学第一附属医院/江苏省人民医院/江苏省妇幼保健院妇女保健科江苏南京210029

目的分析产后6周女性压力性尿失禁(SUI)患者的盆底超声参数,结合临床因素,探索其影响因素。方法回顾性分析2022年3月至2023年4月于安徽医科大学附属滁州医院进行规范化产检、分娩及产后6周复查盆底超声的152例患者资料,根据是否发生产... 详细信息

目的分析产后6周女性压力性尿失禁(SUI)患者的盆底超声参数,结合临床因素,探索其影响因素。方法回顾性分析2022年3月至2023年4月于安徽医科大学附属滁州医院进行规范化产检、分娩及产后6周复查盆底超声的152例患者资料,根据是否发生产后SUI分为SUI组(64例)和非SUI组(88例),分析两组研究对象盆底超声参数和临床因素的不同,构建logistic多因素回归方程探索产后SUI的独立危险因素。结果 SUI组和非SUI组在产次、妊娠期漏尿症状、妊娠期糖尿病方面比较,差异均有统计学意义(P<0.05),在膀胱颈移动度、尿道旋转角、膀胱尿道后角、尿道内口漏斗形成情况、肛提肌裂孔面积方面比较,差异亦有统计学意义(P<0.05)。多因素logistic回归分析发现,膀胱颈移动度(OR=1.284,95%CI:1.134~1.454,P<0.001)、尿道内口漏斗形成(OR=5.475,95%CI:1.335~22.459,P=0.018)和妊娠期漏尿症状(OR=8.838,95%CI:2.229~35.037,P=0.002)是产后6周女性SUI的独立危险因素。结论产后6周女性SUI的独立危险因素为膀胱颈移动度、尿道内口漏斗形成和妊娠期漏尿症状,临床应尽早制定合理的治疗方案,指导预后,提高女性生活质量。

关键词：压力性尿失禁盆底超声膀胱颈移动度尿道内口漏斗形成漏尿妊娠期糖尿病

Surface-enhanced vibrational spectroscopies in electrocatalysis:Fundamentals,challenges,and perspectives

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Chinese Journal of Catalysis 2022年第11期43卷 2757-2771页

作者： Hai-Sheng Su xiaoxia chang Bingjun Xu College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

Electrocatalysis offers a promising approach towards chemical synthesis driven by renewable *** level understanding of the electrochemical interface remains challenging due to its compositional and structural *** situ interfacial specific characterization techniques could help uncover structure-function relationships and reaction *** this end,electrochemical surface-enhanced Raman spectroscopy(SERS)and surface-enhanced infrared absorption spectroscopy(SEIRAS)thrive as powerful techniques to provide fingerprint information of interfacial species at reaction *** this review,we first introduce the fundamentals of SERS and SEIRAS,followed by discussion regarding the technical challenges and potential ***,we highlight future directions for further development of surface-enhanced spectroscopic techniques for electrocatalytic studies.

关键词： Surface-enhanced Raman spectroscopy Surface-enhanced infrared absorption spectroscopy In situ characterization Electrocatalysis Structure-function relationship Reaction mechanism

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机器人辅助盆腔廓清术在宫颈癌治疗中的应用

机器人外科学杂志（中英文） 2024年第2期5卷 172-177页

作者：李蒨刘颖蔚龚雪黎埔君常小霞杜凯玟肖琳唐均英重庆医科大学附属第一医院妇科重庆400016

自1948年国外首次报道应用盆腔廓清术治疗局部复发性宫颈癌以来,此术式逐渐成为治疗盆腔恶性肿瘤的挽救性手术。近年来,随着外科成像技术、微创外科技术和盆底功能重建技术的进步,盆腔廓清术在盆腔局部晚期恶性肿瘤和复发性肿瘤治疗中... 详细信息

自1948年国外首次报道应用盆腔廓清术治疗局部复发性宫颈癌以来,此术式逐渐成为治疗盆腔恶性肿瘤的挽救性手术。近年来,随着外科成像技术、微创外科技术和盆底功能重建技术的进步,盆腔廓清术在盆腔局部晚期恶性肿瘤和复发性肿瘤治疗中的应用更加广泛。本文通过文献学习及经验分享分析了机器人辅助盆腔廓清术在宫颈癌治疗中的可行性。

关键词：盆腔廓清术机器人辅助手术宫颈癌

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Effects of luteal estradiol pre-treatment on the outcome of IVF in poor ovarian responders

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中华医学会第十次全国妇产科学术会议妇科内分泌会场（妇科内分泌学组、绝经学组、计划生育学组）

作者： xiaoxia chang Jie Wu Department of Obstetrics and Gynecology The First Affiliated Hospital of Nanjing Medical University

Background In view of the discrepancies about the luteal estradiol treatment before stimulation protocols having some potential advantages compared with the standard protocols in poor ovarian responders undergoing IVF,a meta-analysis of the published data was performed to compare the ef ? cacy of the luteal estradiol pretreatment protocols in IVF poor response *** We searched for all published articles indexed in

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围绝经期及绝经后妇女生活质量分析

江苏医药 2010年第9期36卷 1021-1024页

作者：常小霞吴洁南京医科大学第一附属医院妇产科 210029

目的研究围绝经期妇女的生活质量及其影响因素。方法将更年期门诊458例妇女分为三组:A组为绝经前妇女,B组为绝经期妇女,C组为绝经后妇女。采用世界卫生组织生活质量测定量简表(WHOQOL-BREF)进行问卷调查,评估总体健康状况、生理领域、... 详细信息

目的研究围绝经期妇女的生活质量及其影响因素。方法将更年期门诊458例妇女分为三组:A组为绝经前妇女,B组为绝经期妇女,C组为绝经后妇女。采用世界卫生组织生活质量测定量简表(WHOQOL-BREF)进行问卷调查,评估总体健康状况、生理领域、心理领域、社会关系领域及环境领域等方面的得分,记录年龄、体重、身高、腰围、臀围、婚姻等情况,对他们的生活质量及可能影响生活质量的因素进行分析。结果 C组的腰臀比明显高于A、B组(P<0.05),B、C组慢性基础疾病的发生率显著高于A组;B组的生活质量总评分最低[(3.48±0.27)vs.(3.51±0.29)(A组)或(3.52±0.30)(C组)](P<0.05);主要影响生活质量的因素是收入、基础疾病及婚姻状况。结论围绝经期妇女的生活质量较低;绝经后妇女有发生中心性肥胖的倾向,且慢性基础疾病的发生率较高。

关键词：生活质量围绝经期

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糖尿病病人医院感染的研究进展

护理研究 2018年第21期32卷 3361-3363页

作者：常小霞袁丽四川大学华西医院

随着抗菌药物的广泛使用,医院感染成为当今医学发展的重要问题。糖尿病病人由于机体长期代谢紊乱,是医院感染的高发人群。病人的年龄、血糖控制情况、糖尿病病程、侵入性操作、住院时间等都是医院感染的危险因素。医院感染不仅可以诱发... 详细信息

随着抗菌药物的广泛使用,医院感染成为当今医学发展的重要问题。糖尿病病人由于机体长期代谢紊乱,是医院感染的高发人群。病人的年龄、血糖控制情况、糖尿病病程、侵入性操作、住院时间等都是医院感染的危险因素。医院感染不仅可以诱发糖尿病急性并发症,同时也是糖尿病的重要死因。综述糖尿病病人医院感染的现状、危险因素和护理干预,为更好地预防和控制糖尿病病人医院感染提供参考。

关键词：糖尿病医院感染危险因素护理

Effect of heat treatment on microstructure and mechanical properties of selective laser-melted PH13-8Mo stainless steel

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Journal of Iron and Steel Research International 2024年第4期31卷 945-955页

作者： Yuan Zhang Xiang Liu chang-jun Wang chang Liu School of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Central Iron&Steel Research Institute Co. Ltd.Beijing 100081China

PH13-8Mo stainless steel powder with high sphericity and well fluidity was prepared by the plasma rotating electrode *** formed parts with ultra-high purity were manufactured by selective laser *** tensile and impact mechanical properties of the printed parts under three heat treatment regimes were compared to those without heat *** microstructure,grain orientation and phase composition were characterized by electron-backscatter diffraction,X-ray diffraction and transmission electron *** characterization results reveal that the addition of heat treatment makes the grains enlarge,and after different heat treatments,the average grain size from 1.51μm in the printed state increases to 2.78,3.09 and 2.06μm,*** formed parts are mainly composed of martensite and retained ***,the NiAl and M23C precipitates form,which are the major strengthening phases of PH13-8Mo stainless *** optimal heat treatment process is 925℃×1 h water cooling(WC)+0℃×2 h air cooling(AC)+540℃×4 h *** this heat treatment process,PH13-8Mo formed parts have the optimal comprehensive mechanical properties:the tensile strength,yield strength and impact energy KU2 are 1492 MPa,1432 MPa and 63 J,*** strengthening and toughening via heat treatment are mainly attributed to dislocation strengthening,the formation of NiAl and M23Co precipitates and the change of volume fraction of the retained austenite.

关键词： High-strength stainless steel-Selective laser melting-Heat treatment Microstructure Mechanical property

Inverse-time Backup Protection Based on Unified Characteristic Equation for Distribution Networks with High Proportion of Distributed Generations

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 202-212页

作者： Nana chang Guobing Song Zhongxue chang Yuping Zheng Xingang Yang the School of Electrical Engineering Xi’an Jiaotong UniversityXi’anChina State Key Laboratory of Smart Grid Protection and Control NARI Group CorporationNanjingChina Electric Power Research Institute of State Grid Shanghai Electric Power Company ShanghaiChina

The setting work of backup protection using steady-state current is tedious,and mismatches occasionally occur due to the increased proportion of distributed generations(DGs)connected to the power ***,there is a practical need to study a backup protection technology that does not require step-by-step setting and can be adaptively *** paper proposes an action sequence adaptive to fault positions that uses only positive sequence fault component(PSFC)*** the influence of DGs,the unified time dial setting can be obtained by selecting specific *** protection performance is improved by using the adjacent upstream and downstream protections to meet the coordination time interval in the case of metallic faults at the near-and far-ends of the ***,the expression and implementation scheme for inverse-time backup protection(ITBP)based on the unified characteristic equation is *** results show that this scheme can adapt to DG penetration scenarios and can realize the adaptive coordination of multi-level relays.

关键词： Inverse-time backup protection(ITBP) distributed generation(DG) positive sequence fault component(PSFC)voltage unified characteristic equation adaptive coordination