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Development of a new Cox model for predicting long-term survival in hepatitis cirrhosis patients underwent transjugular intrahepatic portosystemic shunts

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 491-502页

作者： Yi-fan lv Bing Zhu Ming-Ming Meng Yi-fan Wu Cheng-Bin Dong Yu Zhang Bo-Wen Liu Shao-Li You Sa lv Yong-Ping Yang Fu-Quan Liu Liver Disease Minimally Invasive Diagnosis and Treatment Center Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China Liver Vascular Disease Diagnosis and Treatment Center The Fifth Medical Center of Chinese People's Liberation Army General HospitalBeijing 100039China

BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)placement is a procedure that can effectively treat complications of portal hypertension,such as variceal bleeding and refractory ***,there have been no specific studies on predicting long-term survival after TIPS *** To establish a model to predict long-term survival in patients with hepatitis cirrhosis after *** A retrospective analysis was conducted on a cohort of 224 patients who un-derwent TIPS *** univariate and multivariate Cox regression analyses,various factors were examined for their ability to predict survival at 6 years after ***,a composite score was formulated,encompassing the indication,shunt reasonability,portal venous pressure gradient(PPG)after TIPS,percentage decrease in portal venous pressure(PVP),indocyanine green retention rate at 15 min(ICGR15)and total bilirubin(Tbil)***,the performance of the newly developed Cox(NDC)model was evaluated in an in-ternal validation cohort and compared with that of a series of existing *** The indication(variceal bleeding or ascites),shunt reasonability(reasonable or unreasonable),ICGR15,post-operative PPG,percentage of PVP decrease and Tbil were found to be independent factors affecting long-term survival after TIPS *** NDC model incorporated these parameters and successfully identified patients at high risk,exhibiting a notably elevated mortality rate following the TIPS procedure,as observed in both the training and validation ***,in terms of predicting the long-term survival rate,the performance of the NDC model was significantly better than that of the other four models[Child-Pugh,model for end-stage liver disease(MELD),MELD-sodium and the Freiburg index of post-TIPS survival].CONCLUSION The NDC model can accurately predict long-term survival after the TIPS procedure in patients with hepatitis cirrhosis,help identify high-risk patients

关键词： Transjugular intrahepatic portosystemic shunt Long-term survival Predictive model

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Excess non-COVID-19-related mortality among inflammatory bowel disease decedents during the COVID-19 pandemic

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World Journal of Gastroenterology 2024年第20期30卷 2677-2688页

作者： Sarah Rotondo-Trivette Xin-Yuan He Jamil S Samaan fan lv Emily Truong Michaela Juels Anthony Nguyen Xu Gao Jian Zu Yee Hui Yeo fan-Pu Ji Gil Y Melmed Department of Medicine Cedars-Sinai Medical CenterLos AngelesCA 90048United States Department of Infectious Disease The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Karsh Division of Gastroenterology and Hepatology Department of Medicine Cedars-Sinai Medical CenterLos AngelesCA 90048United States School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049Shaanxi ProvinceChina David Geffen School of Medicine University of CaliforniaLos AngelesLos AngelesCA 90095United States Division of Gastroenterology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina National and Local Joint Engineering Research Center of Biodiagnosis and Biotherapy The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Key Laboratory of Surgical Critical Care and Life Support(Xi’an Jiaotong University) Ministry of EducationXi’an 710004Shaanxi ProvinceChina

BACKGROUND The coronavirus disease 2019(COVID-19)pandemic disrupted healthcare in the United *** To investigate COVID-19-related and non-COVID-19-related death and characteristics associated with excess death among inflammatory bowel disease(IBD)*** We performed a register-based study using data from the National Vital Statistics System,which reports death data from over 99%of the United States population,from January 1,2006 through December 31,***-related deaths among adults 25 years and older were stratified by age,sex,race/ethnicity,place of death,and primary cause of *** and actual age-standardized mortality rates(ASMRs)per 100000 persons were *** 49782 IBD-related deaths occurred during the study ***-COVID-19-related deaths increased by 13.14%in 2020 and 18.12%in 2021[2020 ASMR:1.55 actual vs 1.37 predicted,95%confidence interval(CI):1.26-1.49;2021 ASMR:1.63 actual vs 1.38 predicted,95%CI:1.26-1.49].In 2020,non-COVID-19-related mortality increased by 17.65%in ulcerative colitis(UC)patients between the ages of 25 and 65 and 36.36%in non-Hispanic black(NHB)Crohn’s disease(CD)*** the pandemic,deaths at home or on arrival and at medical facilities as well as deaths due to neoplasms also *** IBD patients suffered excess non-COVID-19-related death during the *** death was associated with younger age among UC patients,and with NHB race among CD *** death at home or on arrival and due to neoplasms suggests that delayed presentation and difficulty accessing healthcare may have led to increased IBD mortality.

关键词： Inflammatory bowel disease Ulcerative colitis Crohn’s disease COVID-19 Excess death Race Sex Disparities

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Efficient micrometer-scale thick-film perovskite solar cells with superior stability

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Rare Metals 2024年第4期43卷 1647-1657页

作者： Jian-Fei Hu Gang Chen Shun-Zhang Yu Yue-Xin Lin Kai-Yu Wang Zong-Wei Li Guo-Dong Zhang Teng-Fei Pan Ya-Jing Li Ming-Jie Li Ying-Dong Xia Yi-fan lv Yong-Hua Chen Key Laboratory of Flexible Electronics(KLoFE)and Institute of Advanced Materials(IAM) School of Flexible Electronics(Future Technologies)Nanjing Tech University(NanjingTech)Nanjing211816China Department of Applied Physics The Hong Kong Polytechnic UniversityHong Kong999077China Shenzhen Research Institute The Hong Kong Polytechnic UniversityShenzhen518057China Optics Valley Laboratory Hubei430074China

It is essential to enhance the thickness of the absorber layer for perovskite solar cells(PSCs)to improve device performance and reduce industry ***,thick perovskite films(>1μm)are difficult to be fabricated by employing traditional solvents,such as N,N-dimethylformamide(DMF),dimethyl sulfoxide(DMSO).Besides,it is a challenge to fabricate thick-film perovskite owing to the deteriorated surface morphology and serious defect ***,a simple method was reported to deposit uniform pinhole-free perovskite films with a thickness of more than 2μm utilizing the methylamine acetate(MAAc)ionic liquid as the *** with methylammonium chloride(MACl)as an additive,thick-film perovskite with~2μm in grain size and few grain boundaries(GBs)was prepared,which dramatically improved the perovskite crystal quality and enhanced carrier transport *** final PSCs exhibited a power conversion efficiency(PCE)of 20.16%.The device showed improved stability with 95%of its initial efficiency in a nitrogen environment over 5000 *** work provides an alternative strategy to produce extremely efficient and stable thick-film *** can be believed that this device has great potential in the application of large areas and laminated PSCs.

关键词： Perovskite solar cells Thick-film Stability Ionic liquid

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The Influence of Ultrasonic Frequency on the Properties of Ni-Co Coatings Prepared by Ultrasound-assisted Electrodeposition

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Acta Metallurgica Sinica(English Letters) 2013年第6期26卷 735-741页

作者： Minqi SHENG Chenkai lv Lan HONG Mingwang SHAO Kang WAN fan lv School of Iron and Steel Soochow University Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University

In this paper, Ni-Co coatings were electrodeposited onto carbon steel substrates with the aid of ultrasonic agitation. The coatings were analyzed by energy dispersive X-ray analysis （EDX）, X-ray diffraction analysis （XRD） and scanning electron microscopy （SEM）. The effects of the ultrasonic frequency on the roughness, hardness and corrosion resistance of the Ni-Co coatings were also investigated. The results indicated that the increase of the ultrasonic frequency from 20 to 120 kHz reduced the Ni content and the grain size of Ni-Co coatings. Moreover, the phase structure of the electrodeposited coatings was influenced by the ultrasonic frequency. Under 55 kHz ultrasonic agitation, the Ni-Co coating was single fcc phase and showed the finest roughness and the strongest corrosion resistance in 5 wt.% NaCl solution at the ambient temperature. Under ultrasonic agitation with frequency of 90 kHz, the coating was a mixture of fcc and hcp structure and showed the maximal hardness of about 420 HV. Therefore, ultrasonic agitation helped decrease the roughness, and enhance hardness and corrosion resistance of Ni-Co coatings.

关键词： Ni-Co alloys Coatings Electrodeposition Ultrasound Hardness Corrosion

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数字经济发展水平、政府科技支出与绿色全要素生产率关系研究——基于DEA与fsQCA方法的实证分析

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中国物价 2024年第4期 79-83页

作者：张晓晖姜安吕凡贵州大学管理学院西安交通大学

文章基于DEA-SBM模型对我国30个省份的绿色全要素生产率(GTFP)进行测算,结合fsQCA方法探讨技术-经济-政府对地区GTFP的因果关系及组态路径。研究发现:(1)单个因素不构成高水平GTFP的必要条件,说明单一条件并不是制约瓶颈,高水平GTFP的... 详细信息

文章基于DEA-SBM模型对我国30个省份的绿色全要素生产率(GTFP)进行测算,结合fsQCA方法探讨技术-经济-政府对地区GTFP的因果关系及组态路径。研究发现:(1)单个因素不构成高水平GTFP的必要条件,说明单一条件并不是制约瓶颈,高水平GTFP的提升路径有3条。(2)通过对条件组态的横向对比,发现创新能力和政府科技支出存在于每一条组态中,说明提高创新能力和增加政府科技支出在提高绿色全要素生产率上具有普适作用。(3)不同地区在提升GTFP的驱动路径方面存在明显差异,且高水平GTFP的解释案例主要集中在中东部地区。

关键词：绿色全要素生产率 fsQCA方法数字经济

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数据要素市场对实体经济发展的影响效应研究

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中国物价 2024年第1期 43-46,52页

作者：张晓晖姜安吕凡贵州大学管理学院西安交通大学

文章基于2011-2021年我国30个省份的面板数据,构建面板固定效应模型进行实证检验,识别数据要素市场壮大实体经济发展的机制。结果表明:数据要素市场对实体经济高质量发展具有积极影响,科技创新和投资集聚是数据要素市场促进实体经济发... 详细信息

文章基于2011-2021年我国30个省份的面板数据,构建面板固定效应模型进行实证检验,识别数据要素市场壮大实体经济发展的机制。结果表明:数据要素市场对实体经济高质量发展具有积极影响,科技创新和投资集聚是数据要素市场促进实体经济发展的重要途径。同时,数据要素市场对实体经济的发展具有区域异质性,对东北部地区实体经济发展存在抑制作用,对中西部地区的促进作用高于东部地区。

关键词：数据要素市场实体经济发展科技创新

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One-dimensional sp carbon:Synthesis,properties,and modifications

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Chinese Physics B 2022年第12期31卷 567-589页

作者： Chao-fan lv Xi-Gui Yang Chong-Xin Shan State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China University of Chinese Academy of Sciences Beijing 100049China Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material PhysicsMinistry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China

Carbyne,as the truly one-dimensional carbon allotrope with sp-hybridization,has attracted significant interest in recent years,showing potential applications in next-generation molecular devices due to its ultimate one-atom *** excellent properties of carbyne have been predicted,however,free-standing carbyne sample is extremely unstable and the corresponding experimental researches and modifications are under-developed compared to other known carbon *** synthesis of carbyne has been slowly developed for the past ***,there have been several breakthroughs in in-situ synthesis and measurement of carbyne related materials,as well as the preparation of ultra-long carbon chains toward infinite *** progresses have aroused widespread discussion in the academic *** this review,the latest approaches in the synthesis of sp carbon are *** then discuss its extraordinary properties,including mechanical,electronic,magnetic,and optical properties,especially focusing on the regulations of these ***,we provide a perspective on the development of carbyne.

关键词： carbyne polyyne linear carbon chains

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Interaction and independence on methane oxidation of landfill cover soil among three impact factors:water,oxygen and ammonium

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Frontiers of Environmental Science & Engineering 2011年第2期5卷 175-185页

作者： Pinjing HE Na YANG Wenjuan fanG fan lv Liming SHAO Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

To understand the influence patterns and interactions of three important environmental factors,*** water content,oxygen concentration,and ammonium addition,on methane oxidation,the soils from landfill cover layers were incubated under full factorial parameter *** addition to the methane oxidation rate,the quantities and community structures of methanotrophs were analyzed to determine the methane oxidation capacity of the *** correspondence analysis was utilized to distinguish the important impact *** content was found to be the most important factor influencing the methane oxidation rate and Type II methanotrophs,and the optimum value was 15%(w/w),which induced methane oxidation rates 10-and 6-times greater than those observed at 5%(w/w)and 20%(w/w),*** oxygen conditions were more suitable for methane oxidation than 3%*** addition of 100 mg-N·kg^(-1) drysoil of ammonium induced different effects on methane oxidation capacity when conducted at low or high water *** regard to the methanotrophs,Type II was sensitive to the changes of water content,while Type I was influenced by oxygen ***,the methanotrophic acidophile,Verrucomicrobia,was detected in soils with a pH of 4.9,which extended their known living environments.

关键词： quantitative polymerase chain reaction(PCR) denaturing gradient gel electrophoresis(DGGE) principal component analysis(PCA) canonical correspondence analysis(CCA)

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Toward the most versatile fluorophore: Direct functionalization of BODIPY dyes via regioselective C–H bond activation

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Chinese Chemical Letters 2019年第10期30卷 1825-1833页

作者： Wanle Sheng fan lv Bing Tang Erhong Hao Lijuan Jiao The Key Laboratory of Functional Molecular Solids Ministry of EducationSchool of Chemistry and Materials ScienceAnhui Normal UniversityWuhu241002China Department of Chemistry Bengbu Medical CollegeBengbu 233030China

Fluorescent dyes are heavily sought for their potentials applications in bioimaging, sensing, theranostic,and optoelectronic materials. Among them, BODIPY dyes are privileged fluorophores that are now widely used in highly diverse research fields. The increasing success of BODIPY dyes is closely associated with their excellent and tunable photophysical properties due to their rich functionalization ***, growing research efforts have been devoted to the direct functionalization of the BODIPY core,because it allows the facile installation of desired functional groups in a single atom economical step. The challenges of this direct C-H derivation come from the difficulties in finding suitable functionalization agents and proper control of the regioselectivity of the functionalization. The aim of this work is to provide an overview of BODIPY dyes and a summarization of the different synthetic methodologies reported for direct C–H functionalization of the BODIPY framework.

关键词： Dyes Pigments BODIPY C-H activation Radical substitution Oxidative nucleophilic substitution

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Amorphous Ru nanoclusters onto Co‐doped 1D carbon nanocagesenables efficient hydrogen evolution catalysis

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Chinese Journal of Catalysis 2022年第1期43卷 110-116页

作者： Wenxiu Yang Weiyu Zhang Rui Liu fan lv Yuguang Chao Zichen Wang Shaojun Guo School of Materials Science & Engineering Peking University Beijing 100871 China Advanced Research Institute of Multidisciplinary Science Advanced Technology Research Institute (Jinan) Key Laboratory of Cluster Science School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China

析氢反应是电解水产制氢的关键反应之一.在碱性条件下,由于催化剂表面与反应过程中产生的氧物种、氢物种与催化剂的吸附未处于最佳状态,析氢反应动力学往往比较缓慢,比在酸性条件下慢2–3个数量级.目前,铂基纳米催化剂被认为是最优的析... 详细信息

析氢反应是电解水产制氢的关键反应之一.在碱性条件下,由于催化剂表面与反应过程中产生的氧物种、氢物种与催化剂的吸附未处于最佳状态,析氢反应动力学往往比较缓慢,比在酸性条件下慢2–3个数量级.目前,铂基纳米催化剂被认为是最优的析氢催化剂,但因价格昂贵、稳定性较差,限制了其在电解水器件上的大规模应用.因此,设计一种价格较为低廉、活性高和稳定性好的碱性析氢催化剂尤为必要.钌作为铂族金属之一,其价格约为铂的三分之一,但其与氢的结合能却与铂类似.因此,钌基催化剂被认为是有望替代铂作为析氢催化剂.本文结合模板法、静电纺丝和碳化热解策略构筑了一种负载无定型钌纳米簇的原子级钴掺杂一维碳纳米笼催化剂,有效提升了碱性条件下析氢反应性能.该催化剂具有较高的比表面积,丰富的缺陷结构,原子级分散的金属Co掺杂以及无定型钌纳米簇结构,并在碱性条件下催化析氢反应时,表现出了低起始过电位,低Tafel斜率(62 mV dec–1)和高稳定性.X射线衍射(XRD)结果表明,该催化剂中钌和钴以无定型形式存在.选区电子衍射结果表明了无定型结构的存在,并且钌以纳米簇形式存在,其平均粒径为1.48 nm.X射线光电子能谱结果表明该催化剂含有较高的氮掺杂,拉曼光谱证明了其存在碳缺陷结构.进一步通过X射线近边吸收谱和扩展边精细结构谱研究了钌和钴的配位环境,结果发现,钌带轻微正电荷,并且存在Ru–Ru键;钴带正电荷,价态介于0与+2价之间,其主要与N配位.在1 mol/L氢氧化钾电解液中,该杂化催化剂的电催化活性明显高于没有钴掺杂的催化剂以及商业化铂/碳催化剂.在电流密度为10 mAcm–2时,过电位仅为40 mV,在过电位为100 mV时,该催化剂的质量催化活性达到了3.77 mAμgRu–1,远超商业化铂/碳(2.01 mAμgRu–1)和钌/碳(1.66 mAμgRu–1).该催化剂也表现出了优异的析氢催化稳定性, 5000圈循环后, 10 mAcm–2下的过电位仅增加了2 mV,在恒电流测试中, 10 h后电位仅下降了95 mV.

关键词：无定型钌纳米簇单原子富缺陷碳析氢反应电催化

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