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Rationally construction of atomic-precise interfacial charge transfer channel and strong build-in electric field in nanocluster-based Zscheme heterojunctions with enhanced photocatalytic hydrogen production

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Nano Research 2024年第6期17卷 5002-5010页

作者： Qingtao Zhu Honglei Shen Chao Han liu Huang Yanting Zhou yuanxin Du Xi Kang Manzhou Zhu Department of Materials Science and Engineering Centre for Atomic Engineering of Advanced MaterialsKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationKey Laboratory of Functional Inorganic Material Chemistry of Anhui ProvinceAnhui UniversityHefei 230601China

The lack of effective charge transfer driving force and channel limits the electron directional migration in nanoclusters(NC)-based heterostructures,resulting in poor photocatalytic performance.Herein,a Z-scheme NC-based heterojunction(Pt1Ag28-BTT/CoP,BTT=1,3,5-benzenetrithiol)with strong internal electric field is constructed via interfacial Co-S bond,which exhibits an absolutely superiority in photocatalytic performance with 24.89 mmol·h^(−1)·g−1 H_(2)production rate,25.77%apparent quantum yield at 420 nm,and~100%activity retention in stability,compared with Pt1Ag28-BDT/CoP(BDT=1,3-benzenedithiol),Ag29-BDT/CoP,and CoP.The enhanced catalytic performance is contributed by the dual modulation strategy of inner core and outer shell of NC,wherein,the center Pt single atom doping regulates the band structure of NC to match well with CoP,builds internal electric field,and then drives photogenerated electrons steering;the accurate surface S modification promotes the formation of Co-S atomic-precise interface channel for further high-efficient Z-scheme charge directional migration.This work opens a new avenue for designing NC-based heterojunction with matchable band structure and valid interfacial charge transfer.

关键词： atomically precise metal nanocluster Z-scheme heterojunction interfacial charge transfer build-in electric field photocatalytic hydrogen production

Design of bifunctional single-atom catalysts NiSA/ZIF-300 for CO_(2) conversion by ligand regulation strategy

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Nano Research 2024年第5期17卷 3827-3834页

作者： Wengang Fu Yapei Yun Hongting Sheng Xiaokang liu Tao Ding Shuxian Hu Tao Yao Binghui Ge yuanxin Du Didier Astruc Manzhou Zhu Department of Chemistry and Centre for Atomic Engineering of Advanced Materials Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationCollege of Materials Science and EngineeringInstitutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefei 230601China Universitéde Bordeaux ISMUMR CNRS N°5255351 Cours de La Libération33405 Talence CedexFrance National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026China Department of Physics University of Science and Technology BeijingBeijing 100083China Anhui Tongyuan Environment Energy Saving Co. LtdHefei 230041China

Carbon-supported noble-metal-free single-atom catalysts(SACs)have aroused widespread interest due to their green chemistry aspects and excellent performances.Herein,we propose a“ligand regulation strategy”and achieve the successful fabrication of bifunctional SAC/MOF(MOF=metal-organic framework)nanocomposite(abbreviated NiSA/ZIF-300;ZIF=ZIF-8)with exceptional catalytic performance and robustness.The designed NiSA/ZIF-300 has a planar interfacial structure with the Ni atom,involving one S and three N atoms bonded to Ni(Ⅱ),fabricated by controllable pyrolysis of volatile Ni-S fragments.For CO_(2) cycloaddition to styrene epoxide,NiSA/ZIF-300 exhibits ultrahigh activity(turnover number(TON)=1.18×105;turnover frequency(TOF)=9830 molSC·mol_(Ni)^(-1)·h^(-1);SC=styrene carbonate)and durability at 70℃ under 1 atm CO_(2) pressure,which is much superior to Ni complex/ZIF,NiNP/ZIF-300,and most reported catalysts.This study offers a simple method of bifunctional SAC/MOF nanocomposite fabrication and usage,and provides guidance for the precise design of additional original SACs with unique catalytic properties.

关键词： single atom catalyst bifunctional CO_(2)conversion cycloaddition

How Well Do CMIP6 and CMIP5 Models Simulate the Climatological Seasonal Variations in Ocean Salinity?

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Advances in Atmospheric Sciences 2022年第10期39卷 1650-1672,I0005-I0015页

作者： yuanxin liu Lijing CHENG Yuying PAN Zhetao TAN John ABRAHAM Bin ZHANG Jiang ZHU Junqiang SONG College of Meteorology and Oceanography College of Computer Science and TechnologyNational University of Defense TechnologyChangsha 410073China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China School of Engineering University of St.Thomas2115 Summit Ave.St PaulMN 55105USA Marine Science Data Center Institute of OceanologyChinese Academy of SciencesQingdao 266071China

This paper includes a comprehensive assessment of 40 models from the Coupled Model Intercomparison Project phase 5(CMIP5)and 33 models from the CMIP phase 6(CMIP6)to determine the climatological and seasonal variation of ocean salinity from the surface to 2000 m.The general pattern of the ocean salinity climatology can be simulated by both the CMIP5 and CMIP6 models from the surface to 2000-m depth.However,this study shows an increased fresh bias in the surface and subsurface salinity in the CMIP6 multimodel mean,with a global average of−0.44 g kg^(−1) for the sea surface salinity(SSS)and−0.26 g kg^(−1) for the 0-1000-m averaged salinity(S1000)compared with the CMIP5 multimodel mean(−0.25 g kg^(−1) for the SSS and−0.07 g kg^(−1) for the S1000).In terms of the seasonal variation,both CMIP6 and CMIP5 models show positive(negative)anomalies in the first(second)half of the year in the global average SSS and S1000.The model-simulated variation in SSS is consistent with the observations,but not for S1000,suggesting a substantial uncertainty in simulating and understanding the seasonal variation in subsurface salinity.The CMIP5 and CMIP6 models overestimate the magnitude of the seasonal variation of the SSS in the tropics in the region 20°S-20°N but underestimate the magnitude of the seasonal change in S1000 in the Atlantic and Indian oceans.These assessments show new features of the model errors in simulating ocean salinity and support further studies of the global hydrological cycle.

关键词： salinity climatology seasonal cycle CMIP5 CMIP6 upper ocean

Screening criteria of mRNA indicators for wound age estimation

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Forensic Sciences Research 2022年第4期7卷 714-725页

作者： Qiuxiang Du Tana Dong yuanxin liu Xiyan Zhu Na Li Lihong Dang Jie Cao Qianqian Jin Junhong Sun School of Forensic Medicine Shanxi Medical UniversityJinzhongChina Shandong Public Security Department The Institute of Criminal Science and TechnologyJinanChina Department of Military Traffic Medicine Army Characteristic Medical CenterChongqingChina

Wound age estimation is a crucial and challenging problem in forensic pathology.Although mRNA is the most commonly used indicator for wound age estimation,screening criteria are lacking.In the present study,the feasibility of screening criteria using mRNA to determine injury time based on the adenylate-uridylate-rich element(ARE)structure and gene ontology(GO)categories were evaluated.A total of 78 Sprague-Dawley male rats were contused and sampled at 4,8,12,16,20,24,28,32,36,40,44,and 48 h after inflicting injury.The candidate mRNAs were classified based on with or without ARE structure and GO category function.The mRNA expression levels were detected using qRT-PCR.In addition,the standard deviation(STD),mean deviation(MD),relative average deviation(d%),and coefficient of variation(CV)were calculated based on mRNA expression levels.The CV score(CVs)and the CV of CV(CV’CV)were calculated to measure heterogeneity.Finally,based on classic principles,the accuracy of combination of candidate mRNAs was assessed using discriminant analysis to construct a multivariate model for inferring wound age.The results of homogeneity evaluation of each group based on CVs were consistent with the MD,STD,d%,and CV results,indicating the credibility of the evaluation results based on CVs.The candidate mRNAs without ARE structure and classified as cellular component(CC)GO category(ARE-CC)had the highest CVs,showing the mRNAs with these characteristics are the most homogenous mRNAs and best suited for wound age estimation.The highest accuracy was 91.0%when the mRNAs without ARE structure were used to infer the wound age based on the discrimination model.The accuracy of mRNAs classified into CC or multiple function(MF)GO category was higher than mRNAs in the biological process(BP)category.In all subgroups,the accuracy of the composite identification model of mRNA composition without ARE structure and classified as CC was higher than other subgroups.The mRNAs without ARE structure and belonging to the CC GO category were more homogenous

关键词： Forensic sciences forensic pathology wound age estimation mRNA indicator ARE structure GO categories

基于主从博弈的园区多主体能量-碳配额共享机制

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中国电机工程学报 2024年第6期44卷 2119-2130,I0003页

作者：刘靓颖蒋凯刘念张元欣新能源电力系统国家重点实验室(华北电力大学) 北京市昌平区102206

目前,电力系统主要通过激励源侧发电企业清洁改造以减少碳排放量,但仍有相当数量的碳排放暂时无法被削减。挖掘配网侧终端用户的碳减排潜力,是促进电力系统碳减排的有力手段。然而,现阶段配网侧低碳策略往往是通过碳排放成本传导或价格... 详细信息

目前,电力系统主要通过激励源侧发电企业清洁改造以减少碳排放量,但仍有相当数量的碳排放暂时无法被削减。挖掘配网侧终端用户的碳减排潜力,是促进电力系统碳减排的有力手段。然而,现阶段配网侧低碳策略往往是通过碳排放成本传导或价格引导等经济策略实现的“被动碳减排”。如何疏导发电侧碳成本,激励用户深度减排是提升电力系统总碳减排量的关键问题。该文基于电碳耦合视角,提出园区点对点(peer-to-peer,P2P)电-碳共享新型商业模式,构建考虑碳交易的园区运营商和用户的效用模型,搭建了融合信息流、能量流、碳流的P2P能量-碳配额共享机制;然后,基于斯塔克伯格主从博弈框架设计最优能源-碳定价模型,优化引导园区用户能量与碳配额共享;最后,通过算例证明了方法的有效性。结果表明,该文提出的共享框架与模型能够优化园区内能源与碳的定价,激励用户参与共享,在提升多能源园区的新能源消纳率的同时进一步减少园区碳排放。

关键词： P2P能量共享电碳耦合主从博弈低碳

数字普惠金融能促进基本养老保险发展吗?——基于我国省级面板数据的实证研究

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现代城市研究 2024年第3期39卷 116-123页

作者：刘妍张乐凡朱远芯南京审计大学金融学院江苏省金融大数据审计信息工程研究中心

文章借助2011—2021年全国31个省(自治区、直辖市)的面板数据,运用中介效应模型实证分析数字普惠金融对基本养老保险发展的影响及作用机制。研究发现,数字普惠金融能够显著促进基本养老保险的发展,内生性处理和稳健性检验均得到一致结... 详细信息

文章借助2011—2021年全国31个省(自治区、直辖市)的面板数据,运用中介效应模型实证分析数字普惠金融对基本养老保险发展的影响及作用机制。研究发现,数字普惠金融能够显著促进基本养老保险的发展,内生性处理和稳健性检验均得到一致结论。异质性分析表明:“覆盖广度”是促进基本养老保险发展的关键因素;相较于城镇职工,养老保险“使用深度”对城乡居民养老保险的影响更大;“数字化程度”则对基本养老保险的发展存在负面影响。进一步的研究表明,数字普惠金融通过提高居民收入水平和保险金给付效率,分别从需求端和供给端促进基本养老保险发展。文章结论旨在为拓宽数字普惠金融研究思路、推动我国基本养老保险发展提供参考。

关键词：数字普惠金融养老保险收入水平保险金给付

基于边缘迭代模型的激光沉积熔池宽度预测方法

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稀有金属材料与工程 2024年第4期53卷 978-987页

作者：苗立国邢飞柴媛欣闫成鑫刘伟军沈阳工业大学机械工程学院辽宁沈阳110870 南京中科煜宸激光技术有限公司江苏南京210038

根据熔池尺寸特征空间分布规律,提出了一种基于边缘迭代模型的熔池宽度预测方法。为了获得精确的熔池宽度,采用数学形态学的方法对熔池图像进行去噪,并用手动阈值的方法对熔池图像进行粗分割。之后利用Canny算法提取出熔池边缘。最后,... 详细信息

根据熔池尺寸特征空间分布规律,提出了一种基于边缘迭代模型的熔池宽度预测方法。为了获得精确的熔池宽度,采用数学形态学的方法对熔池图像进行去噪,并用手动阈值的方法对熔池图像进行粗分割。之后利用Canny算法提取出熔池边缘。最后,使用边缘迭代模型进行边缘迭代,得到精分割后的熔池宽度。对比实验结果表明,该算法具有良好的检测精度和鲁棒性,且简易高效。

关键词：激光金属沉积制造熔池边缘迭代模型特征提取

中老年人群打鼾与动脉粥样硬化心血管疾病10年发病评估风险的相关性研究

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中国全科医学 2024年第7期27卷 810-815页

作者：罗元欣彭德荣张琳刘海英谭军上海市静安区彭浦新村街道社区卫生服务中心 200000

背景随着人们生活方式的变化,动脉粥样硬化心血管疾病(ASCVD)作为心脑血管疾病的重要组成部分,呈现年轻化的趋势,打鼾作为常见的睡眠呼吸相关健康问题,是阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的特征指标,然而目前针对打鼾与ASCVD之间... 详细信息

背景随着人们生活方式的变化,动脉粥样硬化心血管疾病(ASCVD)作为心脑血管疾病的重要组成部分,呈现年轻化的趋势,打鼾作为常见的睡眠呼吸相关健康问题,是阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的特征指标,然而目前针对打鼾与ASCVD之间相关关系的研究较少,仍需要对该因素进行识别,为早期干预提供科学依据。目的探讨中老年人群打鼾频率和ASCVD 10年发病风险的相关性。方法于2018—2021年采取多阶段分层整群抽样的方法对上海市静安区35~75岁常住居民进行调查。通过问卷调查收集研究对象一般资料、实验室检查收集总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)。打鼾频率:每周打鼾1~2次为轻度打鼾,每周打鼾3~4次为中度打鼾,每周打鼾5~7次的为重度打鼾;按ASCVD 10年发病风险0.05)。进一步分析打鼾与ASCVD风险因素的关系,结果显示与不打鼾组相比,重度打鼾是高三酰甘油血症、高总胆固醇血症、高低密度脂蛋白胆固醇血症、低高密度脂蛋白胆固醇血症的危险因素,中度打鼾是高低密度脂蛋白胆固醇血症、低高密度脂蛋白胆固醇血症的危险因素(P<0.05)。轻度打鼾则与ASCVD风险因素无关。结论打鼾频率与ASCVD 10年发病风险及风险因素具有相关性,且集中在中度和重度打鼾人群,应将轻度及中度打鼾人群作为早期干预的重点人群,促进ASCVD的早期防治。

关键词：心血管疾病动脉粥样硬化打鼾中老年人 Logistic模型上海市

Engineered protein nanodrug as an emerging therapeutic tool

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Nano Research 2022年第6期15卷 5161-5172页

作者： yuanxin Li Jing Sun Jingjing Li Kai liu Hongjie Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China Institute of Organic Chemistry University of UlmAlbert-Einstein-Allee 11Ulm 89081Germany Department of Chemistry Tsinghua UniversityBeijing 100084China

Functional proteins are the most versatile macromolecules.They can be obtained by extraction from natural sources or by genetic engineering technologies.The outstanding selectivity,specificity,binding activity,and biocompatibility endow engineered proteins with outstanding performance for disease therapy.Nevertheless,their stability is dramatically impaired in blood circulation,hindering clinical translations.Thus,many strategies have been developed to improve the stability,efficacy,bioavailability,and productivity of therapeutic proteins for clinical applications.In this review,we summarize the recent progress in the fabrication and application of therapeutic proteins.We first introduce various strategies for improving therapeutic efficacy via bioengineering and nanoassembly.Furthermore,we highlight their diverse applications as growth factors,nanovaccines,antibody-based drugs,bioimaging molecules,and cytokine receptor antagonists.Finally,a summary and perspective for the future development of therapeutic proteins are presented.

关键词： therapeutic proteins nanodrug genetic engineering structural modification therapeutic efficacy