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Accurate regulation of carbon skeletons bonded to Fe-N4 single atom nanozymes for efficient generation of reactive oxygen species

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Science China Chemistry 2025年第03期 1067-1077页

作者： Fuchun Nan Qilin Wei Tongtong Kou yuxuan zhao Lanbo Shen Dawei Li Tong Chang Lingyun Wang Fangfang Lang William W.Yu School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated MaterialsShandong Key Laboratory of Advanced Organosilicon Materials and TechnologiesShandong University Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy ConversionShandong University Department of Urology Qilu Hospital of Shandong University Jinan Central Hospital Shandong First Medical University School of Integrated Circuits Shandong University Shandong Provincial Maternal and Child Health Care Hospital Qingdao University

Rational design of single atom nanozymes（SAzymes） could be achieved through the accurate configuration regulation of metal coordination sites,nevertheless,the un-defined carbon environment of traditional SAzymes synthesized by high-temperature pyrolysis makes it difficult to unveil the influence of carbon skeletons with enzyme mimicking activities of ***,we investigated the relationship between the carbon skeletons and the enzyme mimicking activities through the construction of a series of fully π-conjugated covalent organic polymer（COP）-based SAzymes with analogous *** experimental results and theoretical calculations demonstrated that carbon skeletons bonded to the Fe-N4catalytic sites strongly affect the enzyme mimicking activities of COP *** the number of benzene rings in carbon skeletons was 1,the COP SAzyme possessed much more remarkable oxidase（OXD） and peroxidase（POD） mimicking activities,and further reducing or increasing the benzene rings would dramatically inhibit the enzyme mimicking ***,the fantastic enzyme mimicking activity of COP-1 could be applied to colorimetric detection of biological molecules and degradation of *** results provide a new perspective for the rational fabrication of SAzymes with high catalytic efficiency.

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水稻软盘毯状苗分离机设计与试验

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农机化研究 2025年第2期47卷 86-90页

作者：赵语轩毛欣衣淑娟陶桂香田永久黑龙江八一农垦大学程学院黑龙江大庆163319 黑龙江省水稻生态育秧装置及全程机械化工程技术研究中心黑龙江大庆163319

目前,水稻种植环节中育秧环节与移栽环节之间的水稻苗盘分离环节的机械化程度相较于其他环节较为薄弱。为提高水稻全程机械化作业水平,降低生产成本,设计了一种适用于水稻毯状苗与塑料软盘分离的机械装置,主要由输送机构、分离机构、扶... 详细信息

目前,水稻种植环节中育秧环节与移栽环节之间的水稻苗盘分离环节的机械化程度相较于其他环节较为薄弱。为提高水稻全程机械化作业水平,降低生产成本,设计了一种适用于水稻毯状苗与塑料软盘分离的机械装置,主要由输送机构、分离机构、扶苗机构、集苗机构、动力系统和机架组成。对装置的结构及工作原理进行了描述,分析确定各个机构的结构参数。以分离率、茎叶损伤率、基质损伤率为试验指标进行苗盘分离试验,结果表明:水稻软盘毯状苗分离机作业效果较好,分离成功率在95%以上,能够降低生产成本,提高生产效率;茎叶损伤率及基质损伤率均在3%以下,保证后续水稻毯状苗移栽工作的顺利进行,较小的茎叶损伤与基质损伤也保证了后续水稻生长过程中不会受到较大的影响,满足水稻育秧农艺要求和水稻工厂化技术规范要求。

关键词：水稻毯状苗分离机机械化生产

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不同水草种类的中华绒螯蟹养殖池塘水质量评价

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南方水产科学 2025年第1期21卷 131-139页

作者：华清红赵雨轩肖霖徐克葛永春孙云飞成永旭上海海洋大学/农业农村部稻渔综合种养生态重点实验室上海201306 上海海洋大学/水产科学国家级实验教学示范中心上海201306 宿迁市黄墩湖实业发展有限公司江苏宿迁223800 上海海洋大学/农业农村部鱼类营养和环境生态研究中心上海201306 上海海洋大学/上海水产养殖工程中心上海201306

为探讨零换水养殖模式下不同水草种类对中华绒螯蟹(Eriocheir sinensis)养殖池塘水质的影响,通过单因素评价法、平均污染指数、断面综合水质指数(Comprehensive water quality index, CWQI)和主成分分析法评估了养殖池塘水质。种植水草... 详细信息

为探讨零换水养殖模式下不同水草种类对中华绒螯蟹(Eriocheir sinensis)养殖池塘水质的影响,通过单因素评价法、平均污染指数、断面综合水质指数(Comprehensive water quality index, CWQI)和主成分分析法评估了养殖池塘水质。种植水草的种类为伊乐藻(Elodea nuttallii)、苦草(Vallisneria natans)和轮叶黑藻(Hydrilla verticillata),分别记为Class Ⅰ—Ⅲ组,水源组为对照组,记为CK。选取pH、溶解氧(Dissolved oxygen, DO)、高锰酸钾指数(CODMn)、总氮(Total nitrogen, TN)、氨氮(NH_(4)^(+)-N)、硝酸盐氮(NO_(3)^(-)-N)、总磷(Total phosphorus, TP)、磷酸盐(PO_(4)^(3-)-P)和亚硝酸盐氮(NO_(2)^(-)-N)作为监测水质指标。结果显示,各组单因素评价均为Ⅴ类水质,主要污染物为TN和TP;Class Ⅰ—Ⅲ组池塘的平均污染指数分别为1.65、1.59、2.97,对照组为2.00;Class Ⅰ和Class Ⅱ组池塘的CWQI水质评价等级优于其他2组;Class Ⅰ—Ⅲ组池塘主成分得分总体低于CK组。综上,零换水养殖模式下种植伊乐藻或苦草,与外界水源比较,水质均有所好转。

关键词：中华绒螯蟹零换水养殖模式水草水质评价

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Utilization of Energy Storage and Hydrogen in Power and Energy Systems:Viewpoints from Five Aspects

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 1-7页

作者： Yonghua Song Mohammad Shahidehpour Saifur Rahman Nigel Brandon Kai Strunz Jin Lin yuxuan zhao State Key Laboratory of Internet of Things for Smart City University of MacaoTaipaMacao 999078China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Galvin Center for Electricity Innovation Illinois Institute of TechnologyChicagoIL 60616USA Department of Advanced Research Institute Virginia Polytechnic Institute and State UniversityArlingtonVA 22203USA Department of Earth Science and Engineering Imperial College LondonLondon SW72AZU.K Department of Sustainable Electric Networks and Sources of Energy Technische Universitt Berlin10587 BerlinGermany State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Decarbonizing power systems is crucial to mitigating climate change impacts and achieving carbon *** renewable energy supply can reduce greenhouse gas emissions and accelerate the decarbonization ***,renewable energy sources(RESs)such as wind and solar power are characterized by intermittency and often non-dispatchability,significantly challenging their high-level integration into power *** storage is acknowledged as a vital indispensable solution for mitigating the intermittency of renewables such as wind and solar power and boosting the penetrations of *** the CSEE JPES Forum,five well-known experts were invited to give keynote speeches,and the participating experts and scholars had comprehensive exchanges and discussions on energy storage ***,the views on the design,control,performance,and applications of new energy storage technologies,such as the fuel cell vehicle,water electrolysis,and flow battery,in the coordination and operation of power and energy systems were *** experts also provided experience that could be used to develop energy storage for constructing and decarbonizing new power systems.

关键词： Electrolysis electric vehicle energy storage flow battery fuel cell electric vehicle hydrogen energy

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Photovoltaic Power Generation Power Prediction under Major Extreme Weather Based on VMD-KELM

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Energy Engineering 2024年第12期121卷 3711-3733页

作者： yuxuan zhao Bo Wang Shu Wang Wenjun Xu Gang Ma National Key Laboratory of Renewable Energy Grid Integration China Electric Power Research InstituteBeijing100192China School of Electrical and Automation Engineering Nanjing Normal UniversityNanjing210023China

The output of photovoltaic power stations is significantly affected by environmental factors,leading to intermittent and fluctuating power *** the increasing frequency of extreme weather events due to global warming,photovoltaic power stations may experience drastic reductions in power generation or even complete shutdowns during such *** integration of these stations on a large scale into the power grid could potentially pose challenges to *** address this issue,in this study,we propose a network architecture based on VMDKELMfor predicting the power output of photovoltaic power plants during severe weather ***,a grey relational analysis is conducted to identify key environmental factors influencing photovoltaic power ***,GMM clustering is utilized to classify meteorological data points based on their probabilities within different Gaussian distributions,enabling comprehensive meteorological clustering and extraction of significant extreme weather *** data are decomposed using VMD to Fourier transform,followed by smoothing processing and signal reconstruction using KELM to forecast photovoltaic power output under major extreme weather *** proposed prediction scheme is validated by establishing three prediction models,and the predicted photovoltaic output under four major extreme weather conditions is analyzed to assess the impact of severe weather on photovoltaic power station *** experimental results show that the photovoltaic power output under conditions of dust storms,thunderstorms,solid hail precipitation,and snowstorms is reduced by 68.84%,42.70%,61.86%,and 49.92%,respectively,compared to that under clear day *** photovoltaic power prediction accuracies,in descending order,are dust storms,solid hail precipitation,thunderstorms,and snowstorms.

关键词： Major extreme weather photovoltaic power prediction weather clustering VMD-KELM network prediction model

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Why Does the World Need a Reserve Asset with a Hard Anchor？,

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2017年第4期12卷 545-570页

作者： Dongsheng Di Warren Coats yuxuan zhao School of International Studies Renmin University of China Beijing 100872 China International Monetary Institute of Renmin University of China SDR Division of the Finance Department IMF Agriculture Global Practice International Bank for Reconstruction and Development (IBRD)Washington DC USA

From the 1970s, the global currency system has two features： the use of one or a few sovereign currencies as the global reserve asset and the floating exchange rate regime between major currencies. This paper points out that the costs of the dollar＇s use as an international reserve currency exceed the benefits for both the US and the rest of the world. These costs include the exporting of American manufacturing as a byproduct of its current account deficit needed to supply its currency to the rest of the world. In addition to the detriment to trade from unpredictable exchange rate fluctuations, the termination of the U.S. obligation to redeem its currency for gold also removed an important restraint on deficit financing for the US and many other countries in the short-run, thus promoting excessive leverage that was a major contributor to the 2008 financial crisis. The paper suggests replacing several main countries＇ currencies in international reserves with a real Special Drawing Right （SDR） issued according to currency board rules.

关键词： reserve currency exchange rate volatility exorbitant privilege,fiscal discipline hard anchor balance of payments real SDR

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A Method of Evaluating the Effectiveness of a Hydraulic Oscillator in Horizontal Wells

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Sound & Vibration 2023年第1期57卷 15-27页

作者： Zhen Zhong Yadong Li yuxuan zhao Pengfei Ju Research Institute of Engineering Technology PetroChina Xinjiang Oilfield CompanyKaramayChina

Bent-housing motor is the most widely used directional drilling tool,but it often encounters the problem of high friction when sliding drilling in horizontal *** this paper,a mathematical model is proposed to simulate slide drilling with a friction reduction tool of axial vibration.A term called dynamic effective tractoring force(DETF)is defined and used to evaluate friction reduction *** factors influencing the DETF are studied,and the tool placement optimization problem is *** studyfinds that the drilling rate of penetration(ROP)can lower the DETF but does not change the trend of the DETF *** effectively work,the shock tool stiffness must be greater than some critical *** the case study,the best oscillating frequency is within 15∼20 *** reflection of the vibration at the bit boundary can intensify or weaken the friction reduction effec-tiveness,depending on the distance between the hydraulic oscillator and the *** optimal placement position corresponds to the plateau stage of the DETF *** reliability of the method is verified by thefield *** proposed method can provide a design and use guide to hydraulic oscillators and improve friction reduction effectiveness in horizontal wells.

关键词： Hydraulic oscillator axial vibration friction reduction dynamic effective tractoring force placement optimization

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Research on the Construction of Chinese Universities from Intelligent Library to Smart Library

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管理科学与研究（中英文版） 2020年第1期9卷 18-24页

作者： yuxuan zhao School of International Economics and Trade Anhui University of Finance and EconomicsBengbuAnhui 233030China

The study aims to discuss the construction and development of university library,and transform the management and operation mode of university library,thereby realizing the transformation and upgrading to smart *** Anhui University of Finance and Economics as the research object,first,based on the literature and data combined with questionnaire design and expert interview,data statistics was made on the development of smart ***,analytical hierarchy process(AHP)and big data analysis were applied to complete the construction of the smart library ***,based on the data analysis method,the problems in the construction of the smart library were *** results showed that the Chinese smart library started late and developed rapidly after 2012;from information perception to smart service,the construction of smart library system had realized the transformation and upgrading of library construction;the key to solve the construction of smart library was to standardize library construction,realize resource co-construction and sharing,promote technological innovation,and strengthen the construction of smart *** sum up,the construction of smart library is expected to make the library and librarians become the cooperative objects of teaching and scientific research in colleges and universities.

关键词： University Smart Library System Construction Hierarchical Model Smart Service

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The Influence of Bond Market Opening in Trade Field on RMB Internationalization Foreign Exchange Rate

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经济管理学刊（中英文版） 2020年第1期9卷 31-36页

作者： yuxuan zhao School of international economics and trade Anhui University of Finance and economicsBengbuAnhui 233030China

In order to verify that the open bond market is the most direct choice to promote the internationalization of RMB,the empirical analysis method is used to analyze the impact of bond liberalization on the internationalization of RMB foreign exchange ***,the data source processing method of empirical analysis is *** the dynamic panel data regression model and panel threshold model are built to verify the influence factors of RMB internationalization foreign exchange rate and the influence of debt market opening on RMB foreign exchange rate,*** results show that the opening of the creditor's rights market has a significant positive promoting effect on the internationalization of RMB foreign exchange rate,and the development of the domestic creditor's rights market has a significant promoting effect on the internationalization of RMB foreign exchange *** study has a certain role in promoting the status of China's currency in the international community.

关键词： Bond Markets RMB Foreign Exchange Rate The Empirical Analysis

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Efficient production of chemicals from microorganism by metabolic engineering and synthetic biology

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Chinese Journal of Chemical Engineering 2021年第2期34卷 14-28页

作者： Yang Zhang Jing Yu Yilu Wu Mingda Li yuxuan zhao Haowen Zhu Changjing Chen Meng Wang Biqiang Chen Tianwei Tan National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China

The use of traditional chemical catalysis to produce chemicals has a series of drawbacks,such as high dependence on fossil resources,high energy consumption,and environmental *** the development of synthetic biology and metabolic engineering,the use of renewable biomass raw materials for chemicals synthesis by constructing efficient microbial cell factories is a green way to replace traditional chemical catalysis and traditional microbial *** review mainly summarizes several types of bulk chemicals and high value-added chemicals using metabolic engineering and synthetic biology strategies to achieve efficient microbial *** addition,this review also summarizes several strategies for effectively regulating microbial cell *** strategies can achieve the coupling balance of material and energy by regulating intracellular material metabolism or energy metabolism,and promote the efficient production of target chemicals by microorganisms.

关键词： Chemicals Synthetic biology Metabolic regulation Microbial cell factory

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