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A Two-Dimensional NiMoO_(4)Nanowire Electrode for the Sensitive Determination of Hydroquinone in Four Types of Actual Water Samples

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Journal of Analysis and Testing 2022年第4期6卷 382-392页

作者： Li-Wei Bai yu-Fen Shi Xue Zhang Xue-Bo liu feng Wu Chang liu Jian-feng Jia Wen-Bo lu Key Laboratory of Magnetic Molecules and Magnetic Information Materials(Ministry of Education) School of Chemistry and Material ScienceShanxi Normal UniversityTaiyuan030031China School of Medicine Jiangsu UniversityZhenjiang212013China School of Grain Science and Technology Jiangsu University of Science and TechnologyZhenjiang212000China

Hydroquinone(HQ)poses immeasurable risk to human health and the natural environment on the grounds of high toxicity of organic phenolic ***,an innovative electrochemical sensor based on two-dimensional nickel molybdate nanowires(NiMoO_(4)NWs)is constructed for the ultra-sensitive determination of HQ,which can provide useful reference for the human health and environment ***-dimensional NiMoO_(4)NWs are prepared successfully through a facile hydrothermal reaction and annealing *** obtained two-dimensional NiMoO_(4)NWs are characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),high-resolution TEM(HRTEM),energy-dispersive X-ray spectroscopy(EDS)mapping and X-ray photoelectron spectroscopy(XPS).The accurate contents of Ni and Mo have been characterized by inductively coupled plasma atomic emission spectroscopy(ICP-AES),confirming that the lower content of the nickel in NiMoO_(4)NWs possesses the higher catalytic activity of *** the optimized conditions,the constructed HQ sensor exhibits satisfactory electrocatalytic activity with a low detection limit of 0.0355μmol/L(S/N=3),a wide linear range of 0.05-4600μmol/L and sensitivity of 170.064μA/(mmol cm^(2)).The sensor has been successfully applied to the detection of HQ in rainwater,tap water,domestic sewage and drinking water samples with satisfactory *** the same time,this sensor has excellent reproducibility,selectivity,and *** constructed sensor has potential practical application value and broad application prospect in human health and environmental monitoring.

关键词： NiMoO_(4)nanowire Electrochemical sensor Hydroquinone Actual water samples

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First-Principles Study on the Stability and Electronic Properties of Bi-Doped Sr_3Ti_2O_7

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Journal of Materials Science & Technology 2018年第5期34卷 891-898页

作者： Yanli lu Fang liu Xiang Li feng Gao Zheng Chen State Key Laboratory of Solidification Processing Northwestern Polytechnic University

The electronic and crystal structural properties of Bi-doped Sr3Ti2O7 are studied using the first principles density functional theory（DFT）based on pseudopotentials basis and plane-wave *** results show that the formation energy of Bi doping in Site-1 and Site-2 of Sr3Ti2O7 increases with increasing doping *** at the same doping concentration,the formation energy of Bi doping in Site-2 is lower than that in *** undoped Sr3Ti2O7is found to be an insulator and its Fermi level stays at the top of the valence *** the Fermi level of the Bi-doped Sr3Ti2O7moves into the bottom of conduction band,the system undergoes an insulator-to-metal phase ***,our calculation results demonstrated that the Fermi level of the Bi-doped Sr3Ti2O7goes deeper into the bottom of conduction band with increasing doping concentration.

关键词： Strontium titanate ceramics Bi-doping Phase stability Electronic properties First-principles calculations

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Flexible organic artificial synapse with ultrashort-term plasticity for tunable time-frequency signal processing

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Chinese Chemical Letters 2023年第12期34卷 236-240页

作者： Yao Ni lu liu Jiulong feng lu Yang Wentao Xu Institute of Photoelectronic Thin Film Devices and Technology Key Laboratory of Photoelectronic Thin Film Devices and Technology of TianjinCollege of Electronic Information and Optical EngineeringEngineering Research Center of Thin Film Photoelectronic Technology of Ministry of EducationSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300350China Shenzhen Research Institute of Nankai University Shenzhen 518000China

A flexible organic artificial synapse(OAS)for tunable time-frequency signal processing was fabricated using a tri-blend film that had been fabricated using a one-step solution *** combined with a chitosan film,this OAS can achieve an ultrashort-term retention time of only 49 ms for instant electricalcomputing applications;this is the shortest retention time yet achieved by a two-terminal artificial *** array of these flexible OASs can withstand a high bending strain of 5%for 10^(4) cycles;this deformation endurance is a new *** OAS was also sensitive to the number and frequency of electrical inputs;a tunable cut-off frequency enables dynamic filtering for use in image detail *** work provides a new resource for development of future neuromorphic computing devices。

关键词： Flexible organic artificial synapse Tri-blend film Time-frequency signal processing Ultrashort-term plasticity Dynamic filtering

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呼伦湖浮游植物演变特征及影响因素

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湖泊科学 2025年第1期37卷 50-60页

作者：兴月张生刘禹卢宗福史小红杨朝霞王殿飞赵耘溪内蒙古农业大学水利与土木建筑工程学院呼和浩特010018 内蒙古自治区水资源保护与利用重点实验室呼和浩特010018 内蒙古宁城县纪检监察工作保障中心赤峰024200

湖泊中浮游植物过度生长繁殖引起的水华现象日益频繁,严重威胁湖泊生态环境的健康与安全。近年来呼伦湖蓝藻水华覆盖面积有扩大的趋势,2022年呼伦湖蓝藻水华最严重时几乎覆盖了整个湖面,本文分别在春、夏和秋季调查了湖泊表、中、底层... 详细信息

湖泊中浮游植物过度生长繁殖引起的水华现象日益频繁,严重威胁湖泊生态环境的健康与安全。近年来呼伦湖蓝藻水华覆盖面积有扩大的趋势,2022年呼伦湖蓝藻水华最严重时几乎覆盖了整个湖面,本文分别在春、夏和秋季调查了湖泊表、中、底层水体的浮游植物种类、细胞密度、生物量和相关水质指标,共鉴定出浮游植物193种,隶属于8门113属,优势种共14种,物种组成表现为绿藻硅藻蓝藻型,其中春、秋季浮游植物种类数基本相当,夏季最少,但夏季的细胞密度最高,春、夏、秋季的浮游植物生物量分别为686、510和166 mg/L。春季浮游植物Shannon-Wiener多样性指数最高,夏季Margalef丰富度指数最高,春季Pielou均匀度指数最高,呼伦湖浮游植物群落特征及其季节性差异是湖泊水环境条件和气象因素共同作用的结果,相关性分析结果表明,主要影响因素依次为水温、总氮、总磷、pH、溶解氧、气温、蒸发量和风速等。

关键词：呼伦湖浮游植物群落特征水华影响因素

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Clipping discrete multi-tone for peak-power-constraint IM/DD optical systems

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Science China(Information Sciences) 2023年第5期66卷 227-237页

作者： Ji ZHOU Liangchuan LI Jiale HE Xiaofeng lu yu BO Guanyu WANG yuanda HUANG Gengchen liu Yanzhao lu Shecheng GAO yuanhua feng Shancheng ZHAO Weiping liu Changyuan yu Zhaohui LI Department of Electronic Engineering College of Information Science and Technology Jinan University Optical Research Department Huawei Technologies Co. Ltd. Department of Electronic and Information Engineering The Hong Kong Polytechnic University Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

High peak-to-average power ratio(PAPR) is a major drawback of discrete multi-tone(DMT) in peak-power-constraint(PPC) intensity-modulation/direct-detection(IM/DD) optical systems. Symmetric clipping operation is a frequently-used and practical method for mitigating the PAPR of the DMT ***, clipping noise is inevitably induced by the symmetric clipping operation, thereby deteriorating the system’s performance. In this paper, we study the statistical characteristics of the clipping noise in *** on the statistical characteristics, clipping-noise-cancellation(CNC) algorithms are proposed to mitigate the clipping noise in the clipping DMT systems. Theoretically, the clipping noise can be completely removed using the low-density-parity-check-assisted CNC algorithm(LDPC-assisted CNC algorithm). To verify the superiority of the clipping DMT with the CNC algorithm, we conduct an experiment with a50 Gb/s DMT system using 10G-class commercial devices for the scenario of PPC passive optical *** receiver sensitivity of the clipping DMT system with the CNC algorithm can reach-24 d Bm at a 20%soft-decision forward-error-correction limit, which is 2.5 d B higher than that of the DMT system without clipping operation. The clipping operation and the CNC algorithm are added after the original digital signal processing, thereby demonstrating the potential to efectively overcome the drawback in DMT signals and other high-PAPR signals.

关键词： discrete multi-tone peak-to-average power ratio peak-power constraint clipping-noise cancellation intensity-modulation/direct-detection optical systems

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Defect spinel oxides for electrocatalytic reduction reactions

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Nano Research 2024年第5期17卷 3547-3570页

作者： Zhijuan liu Jinyu Guo lu-yu liu Fen Wang Zhijie Kong Yanyong Wang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsKey Laboratory of Special Environmental Functional Materials(Zhengzhou University)Ministry of EducationGreen Catalysis Centerand College of ChemistryZhengzhou UniversityZhengzhou 450001China State Key Laboratory of Chem/Bio-sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Electrocatalytic reduction reactions play a crucial role in electrochemical energy conversion and storage technology,which are emerging technologies to ameliorate environmental *** oxides are widely explored in electrocatalytic oxidation reactions but have a poor intrinsic ability to reduction reactions,making their electrocatalytic ability less *** improve this,defect engineering is a valuable method for regulating the electronic structure and coordination ***,this manuscript discusses the use of defect spinel oxides in electrocatalytic reduction reactions,including the different types of defects,construction methods,and characterization *** also outlines the various applications of defect spinel oxides in different electrocatalytic reduction ***,it goes over the challenges and future outlooks for defect *** review aims to thoroughly explain how defect spinels work in electrocatalytic reduction reactions and serve as a helpful guide for creating effective electrocatalysts.

关键词： defect spinel oxides electrochemical reduction reactions electrocatalytic mechanism dynamic evolution

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Transcriptome analysis of Porphyridium purpureum under salinities of 0 and 68

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Journal of Oceanology and Limnology 2022年第4期40卷 1600-1614页

作者： Xudan lu Fangru NAN Jia feng Junping LÜ Qi liu Xudong liu Shulian XIE School of Life Science Shanxi Key Laboratory for Research and Development of Regional PlantsShanxi UniversityTaiyuan 030006China

The most prominent biological characteristic of Porphyridium purpureum is their unique extracellular sulfated polysaccharides that plays an important protective role against salt *** to stress is associated with metabolic ***,the molecular mechanisms underlying such metabolic changes remain *** study presents the fi rst transcriptome profi ling of ***.A total of 8019 assembled transcripts were identifi ed,annotated,and classifi ed into diff erent biological categories and pathways based on a BLAST analysis against various *** in-depth analysis revealed that many of the diff erentially expressed genes in *** under salinities of 68 and 0 involved polysaccharide metabolism.A comparison of the gene expression levels under diff erent salinities revealed that the polysaccharide synthetic pathway was signifi cantly upregulated under the 68 salinity *** increased expression of the FBP,pfkA,CS,pgm,USP,UGP2,galE,and MPI transcripts in the polysaccharide synthetic pathway and the increase in ATP2 and ATP6 transcripts in the energy metabolic pathway revealed the molecular mechanism of high-salt *** sequencing dataset and analysis could serve as a valuable resource to study the mechanisms involved in abiotic stress tolerance in Rhodophyta.

关键词： transcriptome salinity polysaccharides osmotic adjustment enzyme activity

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Artificial intelligence empowering research on loneliness, depression and anxiety-Using Covid-19 as an opportunity

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Journal of Safety Science and Resilience 2023年第4期4卷 396-409页

作者： Qijian Zheng feng liu Shuya Xu Jingyi Hu Haixing lu Tingting liu School of Computer Science and Technology East China Normal University3663 Zhongshan North RoadShanghai200062China New York University Shanghai No.567Yangsi West RoadPudong DistrictShanghai200126China School of Psychology and Cognitive Science East China Normal University3663 Zhongshan North RoadShanghai200062China Shanghai Key Laboratory of Mental Health and Psychological Crisis Intervention School of Psychology and Cognitive ScienceEast China Normal University3663 Zhongshan North RoadShanghai200062China Faculty of Economics and Management East China Normal University3663 Zhongshan North RoadShanghai200062China

The COVID-19 pandemic has had a profound impact on public mental health,leading to a surge in loneliness,depression,and *** these public psychological issues increasingly become a factor affecting social *** researchers explore ways to address these issues,artificial intelligence(AI)has emerged as a powerful tool for understanding and supporting mental *** this paper,we provide a thorough literature review on the emotions(EMO)of loneliness,depression,and anxiety(EMO-LDA)before and during the COVID-19 ***,we evaluate the application of AI in EMO-LDA research from 2018 to 2023(AI-LDA)using Latent Dirichlet Allocation(LDA)topic *** analysis reveals a significant increase in the proportion of literature on EMO-LDA and AI-LDA before and during the COVID-19 *** also observe changes in research hotspots and trends in both ***,our results suggest that the collaborative research of EMO-LDA and AI-LDA is a promising direction for future *** conclusion,our review highlights the urgent need for effective interventions to address the mental health challenges posed by the COVID-19 *** findings suggest that the integration of AI in EMO-LDA research has the potential to provide new insights and solutions to support individuals facing loneliness,depression,and *** we hope that our study will inspire further research in this vital and revelant domin.

关键词： COVID-19 Loneliness Depression Anxiety EMO-LDA AI-LDA Computational affection

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Evolution of vortex structure around a wall-mounted rough hemisphere

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Journal of Hydrodynamics 2023年第3期35卷 467-481页

作者： Xiang Qiu Hao-xuan liu Jia-hua Li Yi-zhou Tao yu-lu liu School of Science Shanghai Institute of TechnologyShanghai 201418China College of Urban Construction and Safety Engineering Shanghai Institute of TechnologyShanghai 201418China Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai 200072China

In this paper,the large eddy simulation(LES)method is used to calculate Reynolds numbers the range in the range of 3000–30000(based on the diameter of the hemisphere D),and then the statistical analysis method is used to study the influence of Re on the characteristics of the flow field around the rough hemisphere and the evolution law of the tail *** effect of the Reynolds number on the structure of the rough hemisphere flow field and the evolution of vortex structure is studied by vorticity distribution,POD method,and correlation *** can be observed that with the increase of Reynolds number,the shear in the recirculating region of the rough hemisphere is enhanced,the large-scale structure is reduced,the small-scale structure is increased,and the angle between the hairpin vortex and the wall is reduced.λ_(ci)vortex identification and the Q-criterion are used to capture the evolution of a periodic vortex structure.Q-criterion gives the three-dimensional vortex structure behind the hemispherical *** is found that the horseshoe vortex and arch vortex generated by the incoming flow after passing through the hemisphere will interact with the wall surface to form a hairpin vortex,and the hairpin vortex structure will continue to evolve downstream to form a new vortex structure.

关键词： Rough hemisphere large eddy simulation(LES) POD method two-point velocity correlation function

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Examination on the wear process of polyformaldehyde gears under dry and lubricated conditions

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Friction 2021年第3期9卷 538-550页

作者： Guoda yu Huaiju liu Ken MAO Caichao ZHU Zehua lu State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400030China School of Engineering the University of WarwickCoventry CV47ALUK

This study presents the results of detailed wear process examination on polyformaldehyde gears under both dry and lubricated conditions.A multi-purpose durability test rig was employed to study the wear performance of polyformaldehyde gear *** wear behaviors of polyformaldehyde gears under dry and oil-lubricated operating conditions were characterized via measurements of gear tooth surface micro-topography and tooth profile *** the dry running condition,a hump and a gully appear on the tooth surface in the pitch line area of the driving gear and the driven wheel,*** largest amount of wear was observed around the tooth root of the driving ***,the gear tooth wear pattern with lubrication is different from that under the dry running condition.

关键词： polyformaldehyde gear lubrication wear surface damage

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