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Chemical Research in Chinese Universities 2015年第4期31卷 590-596页

作者： FAN wei miao Yue'e LIU Tianxi State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200433 P. R. China

The reduced graphene oxide（RGO）/γ-A1OOH hybrids with different γ-AlOOH contents were successfully prepared via a facile one-pot hydrothermal method. In these hybrids, RGO acts as a conductive linker for improving electron transport, and γ-AlOOH nanoplatelets help to adsorb the target metal ions on the electrode surface, thus faci- litating the electrochemical behavior of the hybrids. The sensitivity of as-prepared RGOγ-AlOOH hybrids toward Pb（II） was tested by square wave anodic stripping voltammograms（SWASV）and the mass ratio of graphene to γ-AlOOH was optimized to improve the sensing performance of RGOγ-AlOOH hybrids. Owing to the superior ab- sorbability of γ-AlOOH for heavy metal ions and excellent electrical conductivity of graphene, the detection limit of the hybrids for heavy metal ions was found to be as low as 1.5× 10^-11 mol/L with optimized γ-AlOOH content in the hybrids. The experimental conditions, such as pH value, mass of electrode material, and deposition time were also investigated and optimized. The as-prepared RGOγ-AlOOH hybrids demonstrate high electrochemical activity and good sensing performance, which offers an alternative platform for the electrochemical sensors.

关键词： Graphene γ-AlOOH Hybrid Heavy metal ion Electrochemical sensor

Thermal stability and sputtering resistance under irradiation of yttria dispersed ferrum films

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Rare Metals 2011年第3期30卷 258-261页

作者： LI Zhengcao YU Xiaoyi miao wei ZHANG Zhengjun State Key Laboratory of New Ceramic and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

Oxide dispersion strengthened （ODS） steels are considered as potential candidates for high temperature applications in fusion reactors be-cause of their excellent thermal creep behavior. In the present work, the double-target magnetron co-sputtering method was recommended to prepare yttria dispersed ferrum films. Vacuum annealing and ion irradiation were carried out to study the surface topography and structural features of the prepared yttria dispersed ferrum samples. Experiments proved that while the yttria doping ratio in the ferrum film increases, the recrystallization temperature of the film will be enhanced and the sputtering damage by Xenon ion irradiation will be lowered. The sput-tering resistance of the obtained films would be improved with the growing of grains under vacuum annealing.

关键词： ferrum yttria dispersion magnetron sputtering resistance thermal properties irradiation

Influence of vacuum annealing and irradiation on magnetic properties of Fe-3% Y_2O_3 films

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Rare Metals 2011年第5期30卷 453-457页

Yttria （Y） dispersed ferrum （Fe） films were prepared by a double-target magnetron co-sputtering method. Vacuum annealing and xenon ion irradiation were conducted to investigate the influence on the magnetic and mechanical properties of the films. The crystal grain growth mechanism and second phase precipitation mechanism were conducted simultaneously in the vacuum annealing process. These two effects led to an opposite variation of nano-hardness and coercivity in the films. Xenon ion irradiation played a role in rapid annealing, which also affected the magnetic performance of the yttria dispersed ferrum films.

关键词： magnetic films yttria magnetron sputtering annealing irradiation magnetic properties

Analysis of the sediment sources of flood driven erosion and deposition in the river channel of the Fu River Basin

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International Journal of Sediment Research 2023年第5期38卷 653-661页

作者： Shanghong Zhang Xujian Hu wei miao Zan Xu School of Water Resources and Hydropower Engineering North China Electric Power University

Studying the characteristics of runoff and sediment processes and revealing the sources of sediment provide key guidance for the scientific formulation of relevant soil erosion protection measures and water conservancy development plans. In the current study, the flow and sediment data of five hydrological stations on the main stream of the Fu River Basin(FRB) from 2007 to 2018 were selected to identify flood events, explore the variation of sediment transport along the FRB, and clarify the sediment sources. The results found that the Jiangyou—Fujiangqiao section is the main source of sediment in the FRB during the flood season. The runoff volume and sediment load during flood events in the Jiangyou—Fujiangqiao section accounted for 35% and 145% respectively of that of Xiaoheba station. These results combined with the change of the sediment load before and after the 2008 Wenchuan Earthquake(May12) show that the sediment in this section mainly comes from the Fu River tributary—the Tongkou River watershed. The calculation results for the sediment carrying capacity of the Fu River show that the main stream was in a state of erosion in theory. However, according to the calculation results for the interval sediment yield during flood events, the sediment load at the Xiaoheba station was smaller than that at the Shehong station upstream. The analysis indicates that this was not because of sediment deposition in the river channel, but because of sand mining in the river channel and sediment interception by water conservancy projects. If heavy rainfall occurs in the FRB, the sediment accumulated upstream will move downstream with the resulting flood, and the sediment yield in the FRB may further increase. These research conclusions can provide reference information for improving the prediction and management ability of soil and water loss in the FRB and scientific regulation of the Three Gorges Reservoir.

关键词： Flood event Fu River Basin (FRB) Sediment source Channel erosion and deposition Sediment carrying capacity

Sinicisation and ethnicity: spatial characteristics of Shui vernacular architecture in Guizhou, Southwest China

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Built Heritage 2020年第3期4卷 31-46页

作者： Yizhi Zhou miao wei College of Architecture and Urban Planning Tongji UniversityShanghai 200092China H+Architecture and Engineering Co. Ltd1728-2Shanghai 200433China

The Shui people are an ethnic minority living in southern mountainous areas of Guizhou Province,China;they have retained many vernacular houses with a history of over a *** spatial analysis software depthmapX to perform visibility graph analysis and field-of-view analysis with space syntax,we examined the sequence,organisation,and hierarchy of the living space in Shui *** found that those residences were influenced by external cultures,resulting in two types of plan layout:front-middle-back(type A)and left-middle-right(type B).Those two types of spatial combination were evident in two different line-of-sight *** type A,the hearth was the core and served as the daily living space of the *** type B,the ancestral altar was the core and served as the ritual *** historical coexistence and changing relationship of the two axes reflect cultural exchange between the Shui and Han as well as with other foreign *** study concludes that the diversity of spatial forms that developed in different historical periods is an important attribute of Shui houses and those of other ethnic minorities in Southwest China.

关键词： Vernacular architecture Shui ethnic group Spatial analysis Sinicisation Ethnicity Cultural exchange

煤电基地CO_(2)和CH_(4)遥感监测及时空特征分析

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煤田地质与勘探 2024年第6期52卷 79-90页

作者：徐燕飞陈永春李静刘晓舟苗伟赵得荣芮成奇深部煤炭安全开采与环境保护全国重点实验室安徽淮南232001 中国矿业大学环境与测绘学院江苏徐州221116 安徽省煤矿绿色低碳发展工程研究中心安徽淮南232001 淮南大气科学研究院安徽淮南232001

【目的】CO_(2)和CH_(4)是煤电基地能源生产活动中的主要温室气体排放种类,其监测与时空分布是研究区碳监测体系建设的重要内容。【方法】以安徽淮南市为例,利用GOSAT、OCO-2和Sentinel-5P这3种卫星数据进行研究区CO_(2)和CH_(4)浓度监... 详细信息

【目的】CO_(2)和CH_(4)是煤电基地能源生产活动中的主要温室气体排放种类,其监测与时空分布是研究区碳监测体系建设的重要内容。【方法】以安徽淮南市为例,利用GOSAT、OCO-2和Sentinel-5P这3种卫星数据进行研究区CO_(2)和CH_(4)浓度监测,得到CO_(2)、CH_(4)柱浓度(XCO_(2)和XCH_(4))变化和分布情况,采用源清单法分析CO_(2)行业和区域排放特征,同时采用Pearson相关系数和多元回归方法分析影响研究区XCO_(2)和XCH_(4)浓度的主控因素。【结果和结论】结果表明:(1)基于GOSAT和OCO-2卫星融合数据分析显示,淮南市2016-2020年XCO_(2)和XCH_(4)浓度整体呈增长趋势,期间XCO_(2)浓度增加12×10^(-6)、XCH_(4)浓度增加23×10^(-9);XCO_(2)浓度和累计发电量的Pearson相关系数为0.98,XCH_(4)浓度和累计煤炭产量的Pearson相关系数为0.99,均呈极强相关。(2)利用Sentinel-5P卫星搭载的对流层观测仪(TROPOMI)高分辨产品数据分析淮南市各区域XCH_(4)浓度分布时空特征发现,研究区秋季XCH_(4)浓度高于夏季,XCH_(4)浓度受能源生产和农业生产两方面的影响。(3)源清单法得出淮南市一级源分类CO_(2)排放最多的为化石燃料固定燃烧源,占全市CO_(2)总排放量的89.59%,化石燃料固定燃烧源中电力供热占比99%以上;主要为淮南市潘集区和凤台县燃煤电厂CO_(2)排放;源识别显示集中分布在淮南市北部的火力发电厂为研究区CO_(2)最主要排放源。(4)影响研究区XCO_(2)浓度的主控因素为地区生产总值、累计发电量和第二产业产值,影响XCH_(4)浓度的主控因素为累计煤炭产量、第一产业产值、播种面积。研究结果对我国“双碳”目标下煤电基地碳监测体系构建与完善具有重要的参考意义。

关键词：碳排放遥感监测 XCO_(2) XCH_(4) 主控因素多元回归分析煤电基地安徽淮南市

Multi-scale fusion residual encoder-decoder approach for low illumination image enhancement

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The Journal of China Universities of Posts and Telecommunications 2022年第2期29卷 63-72页

作者： Pan Xiaoying wei miao Wang Hao Jia Fengzhu School of Computer Science and Technology Xi'an University of Posts and TelecommunicationsXi'an 710121China Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing Xi'an University of Posts and TelecommunicationsXi'an 710121China School of Software Northwestern Polytechnical UniversityXi'an 710072China

The sensing light source of the line scan camera cannot be fully exposed in a low light environment due to the extremely small number of photons and high noise,which leads to a reduction in image quality.A multi-scale fusion residual encoder-decoder(FRED)was proposed to solve the *** directly learning the end-to-end mapping between light and dark images,FRED can enhance the image’s brightness with the details and colors of the original image fully restored.A residual block(RB)was added to the network structure to increase feature diversity and speed up network ***,the addition of a dense context feature aggregation module(DCFAM)made up for the deficiency of spatial information in the deep network by aggregating the context’s global multi-scale *** experimental results show that the FRED is superior to most other algorithms in visual effect and quantitative evaluation of peak signal-to-noise ratio(PSNR)and structural similarity index measure(SSIM).For the factor that FRED can restore the brightness of images while representing the edge and color of the image effectively,a satisfactory visual quality is obtained under the enhancement of low-light.

关键词： image enhancement low illumination feature fusion residual network

Toxicogenomic investigation of Tetrahymena thermophila exposed to dichlorodiphenyltrichloroethane (DDT),tributyltin (TBT),and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)

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Science China(Life Sciences) 2011年第7期54卷 617-625页

作者： CHANG Yue FENG LiFang miao wei Key Laboratory of Aquatic Biodiversity and Conservation Institute of Hydrobiology Chinese Academy of Sciences Wuhan 430072 China College of Food Science and Biotechnology Zhejiang Gongshang University Hangzhou 310035 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Dichlorodiphenyltrichloroethane (DDT),tributyltin (TBT),and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) are persistent in the environment and cause continuous toxic effects in humans and aquatic *** thermophila has the potential for use as a model for research regarding *** this study,this organism was used to analyze a genome-wide microarray generated from cells exposed to DDT,TBT and *** accomplish this,genes differentially expressed when treated with each toxicant were identified,after which their functions were categorized using GO enrichment *** results suggested that the responses of *** were similar to those of multicellular ***,the context likelihood of relatedness method (CLR) was applied to construct a TCDD-relevant *** T-shaped network obtained could be functionally divided into two *** general functions of both subnetworks were related to the epigenetic mechanism of *** on analysis of the networks,a model of the TCDD effect on *** was ***,Tetrahymena has the potential to be a good unicellular eukaryotic model for toxic mechanism research at the genome level.

关键词： microarray enrichment analysis gene interaction network pollutant

Synthesis and Structure of Zinc Complex of N, N-bis ( benzimidazol-2-yl-methyl ) amine

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Chinese Chemical Letters 2001年第6期12卷 563-564页

作者： Xiao Lan LIU Qing Yan CHENG Xia YANG Zhi wei miao wei LIU Fang Ming miao College of Chemistry and Life Science Tianjin Normal UniversityTianjin 300074

The Zinc complex of N, N-bis (benzimidazol 2-yl-methy])amine has been synthesized and its crystal structure determined by X-ray diffraction method. The structure features of the complex are described.

关键词： Zinc compex N N-bis (benzimidazol-2-yl-methyl)amine superoxide dismutase (SOD)

Numerical Analysis of Finite Deformation of Overbroken Rock Mass in Gob Area Based on Euler Model of Control Volume

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Journal of China University of Mining and Technology 2006年第3期16卷 245-248页

作者： LIU wei-qun miao Xie-xing School of Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

The overbroken rock mass of gob areas is made up of broken and accumulated rock blocks compressed to some extent by the overlying strata. The beating pressure of the gob can directly affect the safety of mining fields, formarion of road retained along the next goaf and seepage of water and methane through the gob. In this paper, the software RFPA＇2000 is used to construct numerical models. Especially the Euler method of control volume is proposed to solve the simulation difficulty arising from plastically finite deformations. The results show that three characteristic regions occurred in the gob area：（1） a naturally accumulated region, 0-10 m away from unbroken surrounding rock walls, where the beating pressure is nearly zero; （2） an overcompacted region, 10-20 m away from unbroken walls, where the beating pressure results in the maximum value of the gob area; （3） a stable compaction region, more than 20 m away from unbroken walls and occupying absolutely most of the gob area, where the beating pressures show basically no differences. Such a characteristic can exolain the easy-seeoaged “O”-ring phenomena around mining fields very well.

关键词： overbroken rock mass plastically finite deformation method of control volume bearing pressure