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Rare Metals 2020年第6期39卷 680-687页

作者： xia-xia Li Pei-Yao Zhu Qing Li yu-xia xu Yan Zhao Huan Pang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China Guangling College Yangzhou UniversityYangzhou 225000China College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068China

Here,N-and P-doped carbon-carbon nanotube CoP(NPC-CNTs-CoP)nanoparticles dodecahedra are achieved by multistep calcination of the Zn-doped zeolitic imidazolate framework ZIF-67 precursor(ZnCo-ZIF).In the structures,the presence of N and P atoms,abundant CNTs and the CoP nanoparticles can enhance electrochemical activity and promote the structural stability of *** the temperature increases,the Zn contents gradually reduce to zero,which provides more active sites for electrochemical ***,the high specific surface area and microporous behavior of NPC-CNTsCoP-9 make it excellent in electrocatalytic ***-CoP-9 shows a low overpotential of 224 mV at10 mA·cm^-2 in 1.0 mol·L^-1 KOH *** strategy of zeolitic imidazole framework-derived transition metal phosphides will provide a new sight for developing energy conversion materials.

关键词： Nitrogen Phosphorus Carbon Carbon nanotube CoP Oxygen evolution

基于机器学习的人工关节置换术后医院感染预测模型的构建与评价

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中华医院感染学杂志 2024年第12期34卷 1826-1830页

作者：甘文思干铁儿杨西帆余旭霞杨璐李文渊浙江大学公共卫生学院大数据健康科学系(浙江大学医学院附属第二医院临床大数据与统计中心) 浙江杭州310058 温州市中西医结合医院感染管理科浙江温州325000 浙江中医药大学附属第一医院(浙江省中医院)感染管理科浙江杭州310000

目的构建一种基于机器学习的预测模型,用于人工关节置换术后医院感染的预测.方法选择浙江省杭州市某三甲医院2017年1月-2022年11月进行人工关节置换手术的1800例住院患者作为研究对象,将数据集以3:1的比例随机分成训练集(1350例)和测试... 详细信息

目的构建一种基于机器学习的预测模型,用于人工关节置换术后医院感染的预测.方法选择浙江省杭州市某三甲医院2017年1月-2022年11月进行人工关节置换手术的1800例住院患者作为研究对象,将数据集以3:1的比例随机分成训练集(1350例)和测试集(450例).在训练集中应用递归特征消除方法进行自变量筛选,通过网格搜索方法确定逻辑回归、支持向量机(SVM)、决策树(DT)、极端梯度提升(XGBoost)和随机森林(RF)等五类模型的最佳参数.使用敏感度(TPR)、阳性预测值(PPV)、特异度(TNR)、阴性预测值(NPV)、F1分数、准确度和曲线下面积(AUC)等指标来评估模型性能,确定较优机器学习模型,并采用沙普利加性解释(SHAP)方法对较优模型中的变量重要性进行解释.结果1800例参与者中102例发生感染,发生率为5.67%;逻辑回归、DT、RF、SVM和XGBoost等五个模型在训练集中的AUC值达0.92、0.89、0.98、0.70、0.98;测试集中AUC值则分别为0.85、0.78、0.86、0.63、0.88;XGBoost、RF模型为较优的机器学习模型.SHAP结果显示围手术期抗菌药物使用天数、手术时间、年龄、国家医院感染监控系统(NNIS)评分、失血量是较为重要的预测因子.结论本研究建立了基于机器学习算法的人工关节置换术后医院感染风险预测模型,并比较了多种预测模型的效能,其中XGBoost、RF模型的总体性能较优,有利于及时准确地识别人工关节置换术后医院感染高危患者并实施有效的干预措施.

关键词：人工关节置换机器学习预测模型术后医院感染

Evolution of inner wall wrinkle defects in the sinking zone of a thick-walled steel tube during radial forging

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Advances in Manufacturing 2024年第2期12卷 396-408页

作者： yu-Zhao Yang Cheng xu Li-xia Fan School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094People’s Republic of China

An axial wrinkle defect was observed in the inner wall of the sinking zone of a thick-wall steel tube processed by cold radial *** can evolve into *** present study focuses on the evolution of wrinkles and the effects of process parameters on them using a three-dimensional radial forging process finite element model,radial forging experiments,and surface morphology *** results indicated that the vertical section angle of the hammer die and the size of the tube blank significantly affect the evolution of *** height-to-width ratioλwas introduced to describe the morphology of *** had an approximately linear relationship with the radius reduction in the sinking *** was a linear correlation between the growth slope ofλand the axial to circumferential strain ratio|εr/εθ|,which can predict theλunder few process *** the 30SiMn2MoVA steel,at the junction of the forging and sinking zones,the threshold ofλof the wrinkle that can evolve into a fissure is approximately 1.123.

关键词： Radial forging Inner wall Wrinkle defects Evolution Sinking zone

Enhancing reversible hydrogen storage performance of 2LiBH_(4)–MgH_(2)via in-situ building heterogeneous nucleation sites

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Rare Metals 2024年第9期43卷 4367-4376页

作者： Wei Chen Ya-Hui Sun Tian xu xue-Bin yu Guang-Lin xia Department of Materials Science Fudan UniversityShanghai 200433China

2LiBH_(4)-MgH_(2)composite is one of the most attractive reactive hydride composites with a theoretic hydrogen capacity of 10.8 wt%.However,the large nucleation restriction of MgB_(2)during the second step of dehydrogenation results in sluggish hydrogen storage kinetics and high operating temperature,which hinders its practical application as on-board hydrogen storage ***,Al3Ti doped Al nanoparticles(AT NPs)are prepared by a facile chemical reduction reaction to improve the hydrogen storage performance of 2LiBH_(4)-MgH_(2)*** the initial H_(2)desorption process,MgAlB_(4)and TiB_(2)that have identical crystal structure and low d-value mismatch with MgB_(2)resulting from the reaction between AT NPs and 2LiBH_(4)-MgH_(2)composite serve as effective nucleation sites for the formation of MgB_(2).As a result,the apparent activation energy of the two-step H_(2)desorption of AT NPs doped 2LiBH_(4)-MgH_(2)composite are notably decreased to(110.0±5.9)and(119.6±1.4)kJ·mol^(-1),which is 55.5 and 33.5 kJ·mol^(-1)lower than that of the undoped *** importantly,a reversible hydrogen storage capacity of 9.2 wt%after 10cycles of H_(2)desorption and adsorption could be achieved,corresponding to a capacity retention rate of 99%.The building of reactive bimetallic catalyst towards in situ formation of heterogeneous nucleation sites provides a new strategy for improving the hydrogen storage performance of reactive hydride composites.

关键词： Reversible hydrogen storage Reactive hydride composites Catalytic effects Heterogeneous nucleation

Analysis of Intelligent Equipment Usage for Work-Related Musculoskeletal Disorders Prevention in Miners—Shanxi Province,China,2023

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China CDC weekly 2024年第34期6卷 862-866页

作者： Haimiao yu Zepeng xu Ying xia Shuo Zhang xiaoting Jia School of Economics and Management China University of Mining and TechnologyXuzhouJiangsu ProvinceChina Administrators Training Center National Health Commission of the People’s Republic of ChinaBeijingChina

Summary What is already known about this topic?Work-related musculoskeletal disorders(WMSDs)are prevalent in the workforce and occur across various *** show that the prevalence of WMSDs among miners is generally over 50%.What is added by this report?High levels of intelligent equipment usage(IEU)can decrease the prevalence of WMSDs among miners by 7.49%and reduce pain by 13.69%on average.

关键词： WMS Work skeletal

Influence of transcatheter arterial embolization on symptom distress and fatigue in liver cancer patients

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 810-818页

作者： xu-Min Yang xu-Yan Yang Xin-yu Wang yue-xia Gu Department of Nursing The First Affiliated Hospital of Naval Medical University(Changhai Hospital)Shanghai 200433China Department of Thyroid Breast and Vascular SurgeryShanghai Fourth People’s Hospital Affiliated to Tongji University School of MedicineShanghai 200434China Department of Nursing Shanghai Fourth People’s Hospital Affiliated to Tongji University School of MedicineShanghai 200434China

BACKGROUND Hepatocellular carcinoma(HCC)is a prevalent malignancy,and transcatheter arterial embolization(TAE)has emerged as a pivotal therapeutic ***-ever,TAE may induce symptom distress and fatigue,adversely affecting the quality of life of *** To investigate symptom distress,fatigue,and associated factors in HCC patients undergoing *** We used a cross-sectional design and purposive sampling to enroll HCC patients who underwent TAE at our institution from January to December ***-naires were utilized to collect data on symptom distress and fatigue scores from the first to the third day after *** Our study revealed a significant reduction in fatigue and symptom distress among patients after ***,fatigue,insomnia,fever and abdominal dis-tension were the most common symptoms troubling patients during the first 3 d *** status,presence of family support,physical functional status,age,and symptom distress were identified as predictors of fatigue in *** Healthcare professionals should educate HCC patients on symptom distress and INTRODUCTION Hepatocellular carcinoma(HCC)ranks as the fifth most prevalent cancer and the third leading cause of cancer-related mortality *** intervention remains the cornerstone of HCC treatment;however,due to the challenges associated with early diagnosis and the lack of specific diagnostic markers,a considerable proportion of patients are diagnosed at advanced stages,rendering them ineligible for surgical *** arterial embolization(TAE)is an interventional therapeutic approach involving the insertion of a fine catheter via the femoral artery to reach the vasculature near the tumor *** aims to obstruct the arterial supply to the tumor by deploying embolic agents,thereby inducing necrosis in cancer *** procedure is suitable for patients with good liver function and overall health,particularly those with large HCCs that ha

关键词： Transcatheter arterial embolization Fatigue Symptom distress Hepatocellular carcinoma Influencing factors

Glass-Ceramics with High Strength and High Transmittance Obtained by Multi-Factor Controlling

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 551-560页

作者：胡云坤 RAO yu WANG Mingzhong xu Yinsheng xia Mengling TAO Haizheng 陆平 School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China xianning CSG Photovoltaic Glass Co. Ltd.Xianning 437100China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Jincheng Optical-mechanical Industry Research Institute Jincheng 048000China

The presence of Li_(2)Si_(2)O_(5) and LiAlSi_(4)O_(10) could effectively improve the elastic modulus and transmittance of lithium disilicate(LD)*** synergistically modulation of the crystal content and grain size,we obtained high strength and high transmittance of LD *** optimal sample had a high transmittance of 90.3%,the hardness was 7.72 GPa,the fracture toughness was 1.07 MPa·m^(1/2),and the elastic modulus was 103.1 GPa.

关键词： lithium disilicate glass-ceramics transmittance mechanical properties

The α and β domains of human metallothionein-3 co-operatively protect against Aβ_(1-42)-Cu^(2+) cytotoxicity

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Chinese Chemical Letters 2012年第10期23卷 1193-1196页

作者： Ying Luo yu xia xu Qin Gui Bao Zhi Chun Ding Cui Qing Zhu Zhong xian Huang xiang Shi Tan Institutes of Biomedical Sciences Fudan UniversityShanghai 200433China Department of Chemistry Fudan UniversityShanghai 200433China State Key Laboratory of Medical Neurobiology Shanghai Medical College of Fudan UniversityChina

Cytotoxicity of Aft with redox active metals in neuronal cells has been implicated in the progression of Alzheimer＇s disease （AD）. Zn7MT-3 protects cell against AβCu2＋ toxicity. The roles of single domain proteins （α/β） and α-β domain-domain interaction of ZnTMT-3 in its anti-Aβ1-42-Cu2＋ toxicity activity were investigated herein. Aβ1-42 and four mutants of human MT3 （α/β domain, β（MT3）--α（MT1） and △31-34） were prepared and characterized. Aβ1-42-Cu2＋ induced hydroxyl radical and ROS production with/without Zn-MTs were measured by fluorescence spectroscopy and DCFH-DA in living cells, respectively. These results indicate that the two domains form a co-operative unit and each of them is indispensable in conducting its bioactivity.

关键词： Aβ1-42 Alzheimer's disease Zn7MT3 ROS Toxicity

计算机视觉提醒对提高发热门诊医务人员脱卸个人防护用品正确率的影响

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中国消毒学杂志 2024年第7期41卷 502-505页

作者：王灯缪红英葛琴灵朱越献余旭霞干铁儿浙江中医药大学附属第一医院浙江省中医院浙江杭州310006

目的研究计算机视觉提醒对提高发热门诊医务人员脱卸个人防护用品(PPE)正确率的影响。方法2022年1—9月间,将某医院发热门诊医务人员分为干预组和对照组,对照组只有视频监控无智能提醒,干预组采用计算机视觉提醒医务人员正确脱卸PPE关... 详细信息

目的研究计算机视觉提醒对提高发热门诊医务人员脱卸个人防护用品(PPE)正确率的影响。方法2022年1—9月间,将某医院发热门诊医务人员分为干预组和对照组,对照组只有视频监控无智能提醒,干预组采用计算机视觉提醒医务人员正确脱卸PPE关键步骤,比较2组脱卸PPE正确率的差异。结果跟对照组相比,干预组在一脱区和二脱区的手卫生正确率明显提升,脱卸PPE整个流程顺序的正确率从干预前的74.66%上升到干预后的91.70%(P<0.001),所有关键步骤的正确率从干预前的89.85%提高到干预后的94.10%(P<0.001)。结论采用计算机视觉智能提醒PPE脱卸流程的关键步骤可以明显提高发热门诊医务人员脱卸PPE的正确率。

关键词：发热门诊计算机视觉个人防护用品医务人员

Corrosion behavior of pure metals(Ni and Ti)and alloys(316H SS and GH3535)in liquid GaInSn

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Nuclear Science and Techniques 2024年第3期35卷 70-83页

作者： Jian-Hui yu Hong-xia xu xiang-Xi Ye Bin Leng Han-xun Qiu Xing-Tai Zhou School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

In this study,the interactions between a Ga-based liquid metal,GaInSn,and several metal materials,including pure metals(Ni and Ti)and alloys(316H stainless steel(SS)and GH3535),at 650℃were *** aim was to evaluate the corrosion performance and select a suitable candidate material for use as a molten salt manometer diaphragm in thermal energy storage *** results indicated that the alloys(316H SS and GH3535)exhibited less corrosion than pure metals(Ni and Ti)in liquid ***-rich binary intermetallic compounds were found to form on the surfaces of all the tested metal materials exposed to liquid GaInSn,as a result of the decomposition of liquid GaInSn and its reaction with the constituent elements of the metal *** corrosion mechanism for all the tested materials exposed to liquid GaInSn was also investigated and proposed,which may aid in selecting the optimal candidate material when liquid GaInSn is used as the pressure-sensing medium.

关键词： Metal materials Liquid GaInSn Corrosion Intermetallic compounds Thermal energy storage systems