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含磷废水的处理及排放评价

大学化学 2024年第5期39卷 52-62页

作者：王静李平平王玥辉修一凡张秉乾王书文高洪涛青岛科技大学化学与分子工程学院山东青岛266042 青岛科技大学材料科学与工程学院山东青岛266042

对分析化学实验“分光光度法测定水和废水中总磷”进行改进:以绿色无毒的麦饭石为载体,制备ZnFe-LDHs(层状双金属氢氧化物)改性麦饭石吸附材料,运用FTIR、XRD、SEM、EDS-mapping等手段进行表征,探索出ZnFeLDHs改性麦饭石对磷的最优吸附... 详细信息

对分析化学实验“分光光度法测定水和废水中总磷”进行改进:以绿色无毒的麦饭石为载体,制备ZnFe-LDHs(层状双金属氢氧化物)改性麦饭石吸附材料,运用FTIR、XRD、SEM、EDS-mapping等手段进行表征,探索出ZnFeLDHs改性麦饭石对磷的最优吸附处理条件,去除率大于98.4%。含磷废水经改性麦饭石吸附处理后,磷的浓度小于0.08 mg·L^(-1),符合磷一级排放标准。该改进实验内容丰富,综合性强,学生在践行“绿色化学”理念中,综合研究能力和团队协作能力得到培养提升,适合推广至本科生高年级教学。

关键词：改性麦饭石吸附磷含量测定环境友好创新设计与改进

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损伤大鼠视神经对闪烁刺激视觉诱发电位的影响

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郑州大学学报（医学版） 2005年第2期40卷 335-336页

作者：张炳谦郑州大学第一附属医院神经内科郑州450052

目的:探讨大鼠视神经功能测定的电生理检测法。方法:SD大鼠20只。左眼为正常对照眼,右眼为急性视神经损伤实验眼。采用LED眼罩闪烁刺激器对左、右眼进行视觉诱发电位的电生理检测。刺激强度5,波宽 2ms,刺激频率0.7次/s。分析时间30... 详细信息

目的:探讨大鼠视神经功能测定的电生理检测法。方法:SD大鼠20只。左眼为正常对照眼,右眼为急性视神经损伤实验眼。采用LED眼罩闪烁刺激器对左、右眼进行视觉诱发电位的电生理检测。刺激强度5,波宽 2ms,刺激频率0.7次/s。分析时间300ms,灵敏度10μV/cm,平均叠加100次。结果:20只大鼠左侧视神经均获得良好确切诱发电位波形。波形主要由N1、P1、N2三相波组成,其中P1波出现较为稳定。正常侧P1潜伏期和波幅分别为(84.11±5.15)ms,(9.89±2.73)μV。视神经损伤侧P1波潜伏期显著延迟,波形变得低宽,分别为 (165.00±34.07)ms,(5.72±1.94)μV。2组相比差异有统计学意义(P<0.01)。结论:本实验确立了SD大鼠的视神经检查法及正常值,为视神经损伤的治疗与康复研究提供了一个可靠的检测手段。

关键词：大鼠视神经闪烁刺激视觉诱发电位

Irrigation and nitrogen fertiliser optimisation in protected vegetable fields of northern China:Achieving environmental and agronomic sustainability

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Journal of Integrative Agriculture 2024年第3期23卷 1022-1033页

作者： bingqian Fan Yitao zhang Owen Fenton Karen Daly Jungai Li Hongyuan Wang Limei Zhai Xiaosheng Luo Qiuliang Lei Shuxia Wu Hongbin Liu State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China/Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture and Rural Affairs/lnstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Teagasc Environmental Research CentreWexford Y35Ireland Institute of Plant Nutrition Resources and Environmental SciencesHenan Academy of Agricultural SciencesZhengzhou 450002China

Globally,sub-optimal use of nitrogen (N) fertiliser and elevated N irrigation groundwater have led to high leached nitrate (NO_(3)^(–)) losses from protected vegetable field *** fertiliser and irrigation management in different soil types is crucial to reduce future N loads from such *** present 4-year study examined leached N loads from lysimeter monitoring arrays set up across 18 protected vegetable system sites encompassing the dominant soil types of northern *** treatments applied at each field site were:1) a high N and high irrigation input treatment (HNHI);2) a low N but high irrigation input treatment (LNHI) and 3) a low N with low irrigation input treatment (LNLI).Results showed that the mean annual leached total nitrogen loads from the HNHI,LNHI and LNLI treatments were 325,294 and 257 kg N ha^(–1) in the fluvo-aquic soil,114,100 and 78 kg N ha^(–1) in the cinnamon soil and 79,68 and 57 kg N ha^(–1) in the black soil,*** N dissolved in irrigation water in the fluvo-aquic soil areas was 8.26-fold higher than in the cinnamon areas.A structural equation model showed that N fertiliser inputs and leaching water amounts explained 14.7 and 81.8%of the variation of leached N loads,***,reducing irrigation water by 21.5%decreased leached N loads by 20.9%,while reducing manure N and chemical N inputs by 22 and 25%decreased leached N loads by only 9.5%. This study highlights that protected vegetable fields dominated by fluvo-aquic soil need management to curtail leached N losses in northern China.

关键词： agriculture water quality nitrate groundwater irrigation management

Energy Price Fluctuation and Real Estate Market Risk Prevention——Empirical Evidence at the Prefecture-Level City Level in China

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China Finance and Economic Review 2024年第2期13卷 3-25页

作者： Zhenxia Wang bingqian Yan Lei Wang National Academy of Economic Strategy Chinese Academy of Social Sciences Institute of Industrial Economics Chinese Academy of Social Sciences

The impact of energy price fl uctuation on the macro economy is a hot issue that is continuously concerned by the academic community,but few literature have paid attention to the impact of energy price fl uctuation on housing price and the financial risks that may *** on the data of cities at and above the prefecture level in China,this paper empirically examines the impact of energy price fl uctuation on the price fl uctuation of the domestic real estate,and analyzes its infl uencing mechanism and transmission *** results show that changes of energy price will significantly affect the fl uctuation of domestic real estate price,and it is more obvious in large cities and *** price affect the demand for housing through changes of interest rate levels on the one hand,and the supply of the real estate market through the cost of housing construction on the other hand,which leads to housing price fl *** a series of robustness tests,the results are still *** the same time,the effect is asymmetric,that is,higher energy price increases the fl uctuation of house price,but the impact of falling energy price is not ***,when preventing real estate market risks,energy price should be considered as a forward-looking indicator to focus on,and the regulation and control policies of the real estate market should be scientifically *** paper not only provides a new perspective on the mechanism of housing price formation,but also enriches the research on the interconnection between energy and financial markets.

关键词： energy price real estate price financial risk

A Multifunctional Polymer as an Interfacial Layer for Efficient and Stable Perovskite Solar Cells

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A Multifunctional Polymer as an Interfacial Layer for Effici...

第十届新型太阳能材料科学与技术学术研讨会

作者： zhang bingqian Chen Kezheng Cui Guanglei Pang Shuping College of Materials Science and Engineering Qingdao University of Science and Technology Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences

Metal-cation defects and halogen-anion defects in perovskite film are critical to the efficiency and stability of perovskite solar cells(PSCs).In this work,a random polymer,poly(methyl methacrylate-co-acrylamide)(PMMA-AM),was synthesized to serve as an interfacial passivation layer for synergistically passivating the under-coordinated Pb and anchor the I-of the [PbI]***,the interfacial PMMA-AM passivation layer can not be destroyed during the hole transport layer deposition because of its low solubility in *** passivation leads to an enhancement in the open-circuit voltage from 1.12 V to 1.22 V and improved stability in solar cell devices,with the device maintaining 95% of the initial power conversion efficiency(PCE) over 1000 h of maximum power point ***,a large-area solar cell module was fabricated using this approach,achieving a PCE of 20.64%.

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先进压缩空气储能系统的基础研究与应用进展

Engineering 2024年第3期34卷 246-269页

作者： Xinjing zhang Ziyu Gao bingqian Zhou Huan Guo Yujie Xu Yulong Ding Haisheng Chen Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Birmingham Centre for Energy Storage&School of Chemical Engineering University of BirminghamBirmingham B152TTUK

Decarbonization of the electric power sector is essential for sustainable ***-carbon generation technologies,such as solar and wind energy,can replace the CO_(2)-emitting energy sources(coal and natural gas plants).As a sustainable engineering practice,long-duration energy storage technologies must be employed to manage imbalances in the variable renewable energy supply and electricity *** air energy storage(CAES)is an effective solution for balancing this mismatch and therefore is suitable for use in future electrical systems to achieve a high penetration of renewable energy *** study introduces recent progress in CAES,mainly advanced CAES,which is a clean energy technology that eliminates the use of fossil fuels,compared with two commercial CAES plants at Huntorf and McIntosh which are conventional ones utilizing fossil *** CAES include adiabatic CAES,isothermal CAES,liquid air energy storage,supercritical CAES,underwater CAES,and CAES coupled with other *** principles and configurations of these advanced CAES technologies are briefly discussed and a comprehensive review of the state-of-the-art technologies is presented,including theoretical studies,experiments,demonstrations,and *** comparison and discussion of these CAES technologies are summarized with a focus on technical maturity,power sizing,storage capacity,operation pressure,round-trip efficiency,efficiency of the components,operation duration,and investment *** application trends were *** paper presents a comprehensive reference for developing novel CAES systems and makes recommendations for future research and development to facilitate their application in several areas,ranging from fundamentals to applications.

关键词： Compressed air energy storage Fundamentals Applications Technological parameters Comparison

信息赋权能力提升如何促进减贫——基于宏观面板数据的实证分析

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中国软科学 2022年第2期 138-150页

作者：臧雷振张冰倩中国农业大学人文与发展学院北京100193 北京大学国家治理研究院北京100871

伴随信息通讯技术的不断发展,如何通过提升信息赋权能力进而有效减少贫困是实践者和研究者关注的焦点,但关于信息赋权能力促进减贫的内在机制依然尚无共识。基于1990—2017年124个国家(地区)的面板数据,通过机器学习中的随机森林方法实... 详细信息

伴随信息通讯技术的不断发展,如何通过提升信息赋权能力进而有效减少贫困是实践者和研究者关注的焦点,但关于信息赋权能力促进减贫的内在机制依然尚无共识。基于1990—2017年124个国家(地区)的面板数据,通过机器学习中的随机森林方法实现对控制变量的客观选取,不同的实证模型表明:信息赋权能力虽然对不同国家(地区)降低贫困发生率具有显著的正向影响,但这一影响呈现出两个临界拐点的非线性特征。进一步分析发现信息赋权能力对减贫的长、短期动态效应存在显著差异,同时这一影响机制既展现在信息赋权能力对贫困发生的外部环境改善,形成减贫的外生刺激机制,还呈现在信息赋权能力降低减贫过程中对内生环境的路径依赖机制。利用工具变量等不同稳健性检验方法验证上述结果的一致性。这一研究发现为后发国家通过信息赋权能力提升来实现发展的弯道超车提供理论与实证支撑,也为中国反贫困实践的理论提炼和经验的国际推广提供了新视角。最后讨论了本研究的理论、方法和政策层面启迪。

关键词：信息赋权能力全球减贫互联网普及率机器学习方法贫困

An integrated microfluidic platform for nucleic acid testing

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Microsystems & Nanoengineering 2024年第3期10卷 181-194页

作者： Antao Sun Petra Vopařilová Xiaocheng Liu bingqian Kou TomášŘezníček TomášLednický Sheng Ni JiříKudr Ondřej Zítka Zdenka Fohlerová Petr Pajer Haoqing zhang Pavel Neužil Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’anShaanxi 710072P.R.China Department of Chemistry and Biochemistry Mendel University in BrnoZemědělská161300 BrnoCzech Republic ITD Tech s.r.o Osvoboditelů100573581 BohumínCzech Republic Central European Institute of Technology Brno University of TechnologyPurkyňova 123Brno 61200Czech Republic Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina Department of Microelectronics Faculty of Electrical Engineering and CommunicationBrno University of TechnologyTechnická3058/10Brno 61600Czech Republic Military Health Institute U Vojenskénemocnice 120016200 Praha 6Czech Republic The Key Laboratory of Biomedical Information Engineering of Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’anShaanxi 710049P.R.China Bioinspired Engineering and Biomechanics Center(BEBC) Xi’an Jiaotong UniversityXi’an 710049P.R.China

This study presents a rapid and versatile low-cost sample-to-answer system for SARS-CoV-2 *** system integrates the extraction and purification of nucleic acids,followed by amplification via either reverse transcriptionquantitative polymerase chain reaction(RT–qPCR)or reverse transcription loop-mediated isothermal amplification(RT–LAMP).By meeting diverse diagnostic and reagent needs,the platform yields testing results that closely align with those of commercial RT-LAMP and RT‒qPCR *** advantages of our system include its speed and *** assay is completed within 28 min,including sample loading(5 min),ribonucleic acid(RNA)extraction(3 min),and RT-LAMP(20 min).The cost of each assay is≈$9.5,and this pricing is competitive against that of Food and Drug Administration(FDA)-approved commercial *** some RNA loss during on-chip extraction is observed,the platform maintains a potential limit of detection lower than 297 *** makes the system particularly useful in environments where centralized laboratories are either unavailable or inconveniently *** key feature is the platform’s versatility,allowing users to choose between RT‒qPCR or RT‒LAMP tests based on specific requirements.

关键词： testing maintain versatile

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多元主体参与城市治理的演化博弈研究

价格理论与实践 2023年第9期 193-198页

作者：张冰倩张沁中国社会科学院拉丁美洲研究所中国社会科学院技术创新与战略管理研究中心

在推进城市治理现代化的背景下,探究多元主体如何参与城市治理,对于实现以人民为中心的发展理念具有重要的理论和现实意义。本文探讨政府、经营主体与社会公众多元主体在城市治理博弈中的策略选择和影响,研究发现:实践中不同的城市治理... 详细信息

在推进城市治理现代化的背景下,探究多元主体如何参与城市治理,对于实现以人民为中心的发展理念具有重要的理论和现实意义。本文探讨政府、经营主体与社会公众多元主体在城市治理博弈中的策略选择和影响,研究发现:实践中不同的城市治理政策对应不同的策略稳定点,且政府的治理政策导向会直接影响其他两方的参与度和协作成效。政府应通过完善政策、确保收益共享和制定明确的约束机制,促进三方的积极参与。同时,建议创建开放、包容和透明的治理平台,建立合理的激励和约束机制,优化资源配置和利益分配,以及加强各方间的信任和合作关系,共同推动城市治理现代化。

关键词：现代城市城市治理多元主体博弈分析