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Ultra‐low single‐atom Pt on g‐C_(3)N_(4)for electrochemical hydrogen peroxide production

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Carbon Energy 2023年第9期5卷 101-112页

作者： Hongcen yang Niandi Lu Juntao Zhang Rui Wang shuhao Tian Mengjun Wang Zhixia Wang Kun Tao Fei Ma Shanglong Peng National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology School of Physical Science and TechnologySchool of Materials and EnergyElectron Microscopy CentreLanzhou UniversityLanzhouChina State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina

Platinum-based materials show excellent electrocatalytic performance and have good potential for use in fuel ***,the high cost and scarce reserves have restricted their wide ***,it is a challenging task to reduce the amount of Pt as well as ensure good catalytic ***,anchoring of Pt single atoms(0.21 wt‰)with ultra-low content on g-C_(3)N_(4)nanosheets(Pt_(0.21)/CN)has been successfully *** obtained Pt_(0.21)/CN catalyst shows excellent two-electron oxygen reduction(2e-ORR)capability for hydrogen peroxide(H_(2)O_(2)).Compared with CN,its H_(2)O_(2)selectivity increased from 80%to 98%in 0.1M KOH,surpassing those in most of the reported ***,the H_(2)O_(2)production rate of Pt_(0.21)/CN is 767 mmol gcat^(-1)h-1,which is 11.1 times that of *** work may pave the way toward the development of an effective method for the design of noblemetal electrocatalysts with low metal loading and high catalytic activity.

关键词： g‐C_(3)N_(4) hydrogen peroxide platinum single‐atom two‐electron oxygen reduction reaction

Confocal laser speckle autocorrelation imaging of dynamic flow in microvasculature

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Opto-Electronic Advances 2022年第2期5卷 22-32页

作者： E Du shuhao Shen Anqi Qiu Nanguang Chen Department of Biomedical Engineering National University of Singapore7 Engineering Drive 1Singapore 117574Singapore

Laser speckle imaging has been widely used for in-vivo visualization of blood perfusion in biological ***,existing laser speckle imaging techniques suffer from limited quantification accuracy and spatial *** we re-port a novel design and implementation of a powerful laser speckle imaging platform to solve the two critical *** core technique of our platform is a combination of line scan confocal microscopy with laser speckle autocorrelation imaging,which is termed Line Scan Laser Speckle Autocorrelation Imaging(LS-LSAI).The technical advantages of LS-LSAI include high spatial resolution(~4.4μm)for visualizing and quantifying blood flow in microvessels,as well as video-rate imaging speed for tracing dynamic flow.

关键词： laser speckle autocorrelation confocal line scan flow

Spatial prediction of landslide susceptibility using GIS-based statistical and machine learning models in Wanzhou County,Three Gorges Reservoir, China

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Acta Geochimica 2019年第5期38卷 654-669页

作者： Ting Xiao Kunlong Yin Tianlu Yao shuhao Liu Faculty of Engineering China University of GeosciencesWuhan 430074HubeiChina School of Engineering and Technology China University of GeosciencesBeijingChina

Landslide susceptibility mapping is vital for landslide risk management and urban *** this study,we used three statistical models[frequency ratio,certainty factor and index of entropy(IOE)]and a machine learning model[random forest(RF)]for landslide susceptibility mapping in Wanzhou County,***,a landslide inventory map was prepared using earlier geotechnical investigation reports,aerial images,and field ***,the redundant factors were excluded from the initial fourteen landslide causal factors via factor correlation *** determine the most effective causal factors,landslide susceptibility evaluations were performed based on four cases with different combinations of factors("cases").In the analysis,465(70%)landslide locations were randomly selected for model training,and 200(30%)landslide locations were selected for *** results showed that case 3 produced the best performance for the statistical models and that case 2 produced the best performance for the RF ***,the receiver operating characteristic(ROC)curve was used to verify the accuracy of each model's results for its respective optimal *** ROC curve analysis showed that the machine learning model performed better than the other three models,and among the three statistical models,the IOE model with weight coefficients was superior.

关键词： Landslide susceptibility mapping Statistical model Machine learning model Four cases

Marine ecological risk assessment for the herbicide sulfometuron-methyl based on species sensitivity distribution approach

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Journal of Oceanology and Limnology 2023年第4期41卷 1493-1503页

作者： Jiaqi LIU Fanping MENG shuhao DU Siyuan SHAO Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

In recent years,herbicide sulfometuron-methyl(SM)has been used to kill the invasive plant Spartina alterniflora in some coastal areas of China,which may lead to the toxic effects on non-target marine *** 96-h median effective concentrations(96-h EC50)of SM on six species of marine microalgae were measured in growth inhibition tests,and were then compared with other published toxicity data,based on which a method of species sensitivity distribution(SSD)was built to estimate the hazardous concentration of SM for 5%of species(HC5)and potentially affected fraction(PAF)for a certain *** indicate that SM exhibited a high toxicity to two species of green algae(Chlorella pacifica and Dunaliella salina)with a 96-h EC50 of 0.11 and 0.13 mg/L respectively,had a medium toxicity to two species of golden algae(Diacronema viridis and Isochrysis galbana)with a 96-h EC50 of 14.24 and 21.48 mg/L respectively,and showed a low toxicity to two species of diatoms(Skeletonema costatum and Phaeodactylum tricornutum)with a 96-h EC50 of 148.99 and>100 mg/L,*** estimated values of HC5 and the predicted no-effect concentrations(PNEC)for SM were 0.077 and 0.015 mg/L,*** to the current dosage for killing *** in tidal flats in Fujian Province,China,SM entering the sea by spraying might cause the acute injury or death of 14%of marine *** hazard could last for about a month for those sensitive ***,on the premise of inhibiting the growth of this invasive plant,the dosage of SM should be reduced as much as possible to avoid severe damage to the marine *** results provide a valuable information for marine ecological risk assessment on SM and for marine environmental management.

关键词： sulfometuron-methyl(SM) microalgae acute toxicity species sensitivity distribution(SSD) marine ecological risk

Development and Application of a High-Performance Triangular Shell Element and an Explicit Algorithm in OpenSees for Strongly Nonlinear Analysis

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Computer Modeling in Engineering & Sciences 2019年第9期120卷 561-582页

作者： Xinzheng Lu Yuan Tian Chujin Sun shuhao Zhang Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry Department of Civil EngineeringTsinghua UniversityBeijing100084China Beijing Engineering Research Center of Steel and Concrete Composite Structures Tsinghua UniversityBeijing100084China.

The open-source finite element software,OpenSees,is widely used in the earthquake engineering ***,the shell elements and explicit algorithm in OpenSees still require further ***,in this work,a triangular shell element,NLDKGT,and an explicit algorithm are proposed and implemented in ***,based on the generalized conforming theory and the updated Lagrangian formulation,the proposed NLDKGT element is suitable for problems with complicated boundary conditions and strong *** accuracy and reliability of the NLDKGT element are validated through typical ***,by adopting the leapfrog integration method,an explicit algorithm in OpenSees and a modal damping model are ***,the stability and efficiency of the proposed shell element and explicit algorithm are validated through the nonlinear time-history analysis of a highrise building.

关键词： Triangular shell element explicit algorithm OpenSees strong nonlinearity

Optimal Operation of an Integrated Electricity-heat Energy System Considering Flexible Resources Dispatch for Renewable Integration

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Journal of Modern Power Systems and Clean Energy 2021年第4期9卷 699-710页

作者： Wei Wang shuhao Huang Guangming Zhang Jizhen Liu Zhe Chen State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China School of Control and Computer Engineering North China Electric Power UniversityBeijing 102206China Department of Energy Technology Aalborg University9220 AalborgDenmark

Large fluctuations may occur on the energy supply and the load sides when large-scale renewable energies are integrated,leading to great challenges in power *** renewable power curtailment is especially numerous in the integrated electricity-heat energy system(IEHES)on account of electricity-heat *** flexible resources(FRs)on both the energy supply and load sides are introduced into the optimal dispatch of the IEHES and further modeled to alleviate the renewable fluctuations in this *** the energy supply side,three kinds of FRs based on electricity-heat coordination are modeled and *** the load side,the shiftable electricity demand resource is *** this basis,the solution for FRs participating in IEHES dispatch is given,with goals of maximizing the renewable penetration ratio and lowering operation *** scenarios are performed,and the results indicate that the proposed optimal dispatch strategy can effectively reduce the renewable energy curtailment and improve the flexibility of the *** contribution degrees of different FRs for renewable integration are also explored.

关键词： Integrated electricity-heat energy system(IEHES) renewable penetration flexible resource(FR) electricity-heat coordination shiftable demand load

Temporal-Spatial Variation of Surface Suspended Matter and Controlling Factors in the Inner Shelf of the East China Sea in Winter

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Journal of Ocean University of China 2019年第1期18卷 9-19页

作者： MIN Jianxiong LI Guangxue DING Dong QIAO Lulu MA Yanyan yang Gang ZHANG Yaqi ZHANG Lei LI shuhao Shanghai Waterway Engineering Design and Consulting Co. Ltd. College of Marine Geosciences Ocean University of China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education Ocean University of China

Based on the observed surface suspended matter in the East China Sea in February 2007 and June 2015, an empirical model was established using L1 b's band 4 data to retrieve surface suspended matter from the Moderate Resolution Imagine Spectroradiometer Terra imagery. The squared correlation coefficient is 0.8358, and the root mean square error is 0.4285 mg L-1. The model reflects the distribution characteristics of surface suspended matter in the inner shelf of the East China Sea. In this paper, the satellite images of the study area were retrieved in January from 2001 to 2015, and the monthly distribution of surface suspended matter were obtained. The inter-annual distribution of the study area is similar, and the concentration of surface suspended matter is higher near the shore than offshore. A large amount of surface suspended matter is transported southeast under the influence of Zhejiang and Fujian coastal current and Taiwan warm current. Only a small amount of surface suspension can reach the Kuroshio area. The surface suspended matter concentration changes obviously near the estuary because of the effect of differences in the flux of the yangtze River. Meanwhile, winter monsoon, temperature front, El Ni?o events, and other factors affect the distribution of surface suspended matter in 100 m isobath to coastal water but minimally influence the distribution in 100 m isobath to deep sea.

关键词： inner shelf of the East China Sea Moderate Resolution Imagine Spectroradiometer surface suspended matter monthly distribution inter-annual variation

抗沙门氏菌O8因子单克隆抗体的研制及初步应用

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河南科学 2018年第6期36卷 848-852页

作者：李珊珊张志龙刘丽王玉金杜迅胡宜亮周伏忠杨书豪河南省科学院生物研究所有限公司郑州450008

制备抗沙门氏菌O8因子单克隆抗体,建立C2、C3亚群沙门氏菌酶联免疫吸附分析检测方法.用加热灭活的纽波特沙门氏菌免疫BALB/c小鼠,通过细胞融合建立分泌抗体的杂交瘤细胞株.用ELISA法检测及鉴定单克隆抗体,酶联免疫吸附分析法初步判断抗... 详细信息

制备抗沙门氏菌O8因子单克隆抗体,建立C2、C3亚群沙门氏菌酶联免疫吸附分析检测方法.用加热灭活的纽波特沙门氏菌免疫BALB/c小鼠,通过细胞融合建立分泌抗体的杂交瘤细胞株.用ELISA法检测及鉴定单克隆抗体,酶联免疫吸附分析法初步判断抗体应用于检测试剂的可能性.得到4株与沙门氏菌C2、C3亚群菌株发生反应的单克隆抗体细胞株,分别命名为6F2、7A2、8D8和8D9;4株抗体与肠道正常细菌和常见的致病细菌无交叉反应;单克隆抗体免疫球蛋白类型分别为小鼠IgG_1、IgG_3、IgG_(2b)、IgM,轻链均为kappa;用单克隆抗体7A2和8D8研制的酶联免疫吸附分析试剂盒,对沙门氏菌C2亚群的纽波特沙门氏菌、波那雷恩沙门氏菌和C3亚群的肯塔基沙门氏菌的最低检出值均可达到10~5cfu/m L.获得的单克隆抗体具有较高的特异性,有可能应用于生产检测C2和C3亚群沙门氏菌的酶联免疫吸附分析试剂盒.

关键词：沙门氏菌 O8因子单克隆抗体酶联免疫吸附分析

High-performance broadband flexible photodetector based on Gd_(3)Fe_(5)O_(12)-assisted double van der Waals heterojunctions

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Microsystems & Nanoengineering 2023年第4期9卷 157-165页

作者： Ze Zhang Peirui Ji Shaobo Li Fei Wang Shengmei He Yiwei Cheng shuhao Zhao Kaili Li Xiaomin Wang Yu Wang Shuming yang State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’anShaanxiChina MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi’an Jiaotong UniversityXi’anShaanxiChina

Flexible photodetectors are fundamental components for developing wearable systems,which can be widely used for medical detection,environmental monitoring and flexible ***,compared with 3D materials,lowdimensional materials have degraded performance,a key challenge for current flexible ***,a highperformance broadband photodetector has been proposed and *** combining the high mobility of graphene(Gr)with the strong light–matter interactions of single-walled carbon nanotubes(SWCNTs)and molybdenum disulfide(MoS2),the flexible photodetector exhibits a greatly improved photoresponse covering the visible to near-infrared ***,a thin layer of gadolinium iron garnet(Gd_(3)Fe_(5)O_(12),GdlG)film is introduced to improve the interface of the double van der Waals heterojunctions to reduce the dark *** SWCNT/GdIG/Gr/GdIG/MoS2 flexible photodetector exhibits a high photoresponsivity of 47.375 A/W and a high detectivity of 1.952×1012 Jones at 450 nm,a high photoresponsivity of 109.311 A/W and a high detectivity of 4.504×10^(12) Jones at 1080 nm,and good mechanical stability at room *** work demonstrates the good capacity of GdIGassisted double van der Waals heterojunctions on flexible substrates and provides a new solution for constructing high-performance flexible photodetectors.

关键词： performance double constructing