检索结果-南通市图书馆

Land Cover Changes and Drivers in the Water Source Area of the Middle Route of the South-to-North Water Diversion Project in China from 2000 to 2015

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Chinese Geographical Science 2020年第1期30卷 115-126页

作者： gao wenwen ZENG Yuan ZHAO Dan WU Bingfang REN Zhiyuan State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China Research Center for Policy and Technology of the Office of the South-to-North Water Diversion Project Ministry of Water ResourcesBeijing 100038China

The Middle Route of the South-to-North Water Diversion Project(MR-SNWDP)in China,with construction beginning in 2003,diverts water from Danjiangkou Reservoir to North China for residential,agriculture and industrial *** water source area of the MR-SNWDP is the region that is most sensitive to and most affected by the construction of this water diversion *** this study,we used Landsat Thematic Mapper(TM)and HJ-1 A/B images from 2000 to 2015 by an object-based approach with a hierarchical classification method for mapping land cover in the water source *** changes in land cover were illuminated by transfer matrixes,single dynamic degree,slope zones and fractional vegetation cover(FVC).The results indicated that the area of cropland decreased by 31%and was replaced mainly by shrub over the past 15 years,whereas forest and settlements showed continuous increases of 29.2% and 77.7%,*** changes in cropland were obvious in all slope zones and decreased most remarkably(–43.8%)in the slope zone above 25°.Compared to the FVC of forest and shrub,significant improvement was exhibited in the FVC of grassland,with a growth rate of 16.6%.We concluded that local policies,including economic development,water conservation and immigration resulting from the construction of the MR-SNWDP,were the main drivers of land cover changes;notably,they stimulated the substantial and rapid expansion of settlements,doubled the wetlands and drove the transformation from cropland to settlements in immigration areas.

关键词： remote sensing land cover change object-based classification Middle Route of the South-to-North Water Diversion Project(MR-SNWDP) China

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Effects of Calcination Temperature on the Structure and Adsorption Performance of Ce-Mn/AC Materials

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Wuhan University Journal of Natural Sciences 2017年第5期22卷 435-442页

作者： gao wenwen ZHANG Zhifang CHEN Bi MA Xiangrong YAN Biao School of Chemistry and Chemical Engineering YulinUniversityYulin719000ShaanxiChina Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization Yulin UniversityYulin 719000ShaanxiChina

Activated carbon-supported bimetallic cerium-man- ganese （Ce-Mn/AC） materials were prepared by impregnation method to study the effect of calcination temperature on the structure and adsorption performance of absorbents. The obtained materials were characterized by using X-ray diffraction （XRD）, scanning electron microscope （SEM）, N2 adsorption-desorption iso- therm, Fourier transformed infrared （FT-IR）, and X-ray photoelectron spectroscopy （XPS）. As the results showed, the diffraction peaks of CeO2 decreased and even disappeared; Mn species were transformed from Mn3O4 to Mn2O3 on the surface of Ce-Mn/AC; the BET specific surface area increased first and then decreased on the elevating calcination temperature; the number of acid functions of AC was reduced after being modified by cerium and manganese All these changes were directly attributed to the synergistic effects between MnOx and CeO2. AC800 exhibited the best phenol adsorption capacity. The adsorption mechanism of phenol on Ce-Mn/AC was discussed with hydrophilic （hydrophobic） interaction and hard and soft acid-base theory.

关键词： calcination temperature cerium-manganese acti- vated carbon synergistic effect adsorption

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Two soybean bHLH factors regulate response to iron deficiency

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Journal of Integrative Plant Biology 2018年第7期60卷 608-622页

作者： Lin Li wenwen gao Qi Peng Bin Zhou Qihui Kong Yinghui Ying Huixia Shou State Key Laboratory of Plant Physiology and Biochemistry College of Life Sciences Zhejiang University Institute of Crop Science Anhui Academy of Agricultural Sciences

Iron is an indispensable micronutrient for plant growth and development. Limited bioavailability of Fe in the soil leads to iron deficiency chlorosis in plants and yield loss. In this study, two soybean basic helix-loop- helix transcription factors, GmbHLH57 and GmbHLH300, were identified in response to Fe-deficiency. Both transcription factors are expressed in roots and nodules, and are induced by Fe deficiency; these patterns were confirmed in transgenic hairy roots expressing constructs of the endogenous promoters fused to a GUS reporter gene. Bimolecular fluorescence complementation, yeast two-hybrid and coimmunoprecipitation （co-IP） assays indicated a physical interaction between GmbHLH57 and GmbHLH300. Studies on transgenic soybeansoverexpressing GmbHLH57 that overexpression of each results in no change of the and GmbHLH300revealed transcription factor, alone, responses to Fe deficiency, whereas overexpression of both transcription factors upregulated the downstream Fe uptake genes and increased the Fe content in these transgenic plants. Compared to wild type, these double overexpression transgenic plants were more tolerant to Fe deficiency. Taken together, our findings establish that GmbHLH57 and GmbHLH300 are important transcription factors involved in Fe homeostasis in soybean.

关键词： Leon V. Kochian University of Saskatchewan Canada

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A Z-scheme LaFeO_(3)-CuFe_(2)O4 composite for sulfate radical-based photocatalytic process:Synergistic effect and mechanism

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Chinese Journal of Chemical Engineering 2024年第9期73卷 256-269页

作者： wenwen gao Yuhuan Wang Wang Li Zhifang Zhang Ting Su Miao Mu Ying Gong Rui Dang Rui Bai E Zheng Wei Zhao Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization School Chemistry and Chemical EngineeringYulin UniversityYulin 71900China Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining&TechnologyXuzhou 221116China High Value Utilization of Coal Based Semi-coke Derivatives of Shaanxi University Engineering Research Center Yulin UniversityYulin 71900China

The sulfate radical-based photocatalytic process is supposed to be the most promising way to degrade organic ***,the development of a suitable and efficient photocatalyst is very *** 40LaFeO_(3)-CuFe_(2)O_(4)(40LFO-CFO)nanocomposite was constructed and its catalytic performance was studied using Rhodamine B(RhB)as the target pollutant.40LFO-CFO exhibited excellent RhB degradation by the persulfate(PS)-assisted photocatalytic process compared to the pristine LFO and *** degradation rate constant for RhB by 40LFO-CFO in the Vis/PS system was 2.22h^(-1)which is 3.04 times and 5.05 times higher than the pristine LFO(0.73 h^(-1))and CFO(0.44h^(-1)),***,the trapping experiments and EPR spectra proved that h^(+) plays a leading role in the bleaching of RhB for the 40LFO-CFO/PS/Vis *** enhanced photocatalytic oxidation activity of 40LFO-CFO could be attributed to the unique charge carriers flow in 40LFO-CFO due to the Z-scheme and the cooperation effect between photocatalysis and PS *** recycle tests confessed the stability of ***,the intermediates and products of RhB are detected by liquid chromatographymass spectrometry(LC-MS),and the photocatalytic degradation routes of RhB for the 40LFO-CFO/Vis/PS system were ***,the 40LFO-CFO nanocomposite has a superior catalytic performance for other organics,suggesting that it is a promising heterocatalyst because of its high catalytic activity and stability for the PS-assisted photocatalytic process.

关键词： Interfacial charge transfer Sulfate radical-based photocatalytic process Z-scheme electron transfer Enhanced charge pair separation Organic pollutants degradation

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Planning and Design of Food System in Bajiao Community of Shijingshan District of Beijing under the Background of Healthy Community

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Journal of Landscape Research 2021年第1期13卷 35-44页

作者： YANG Xin gao wenwen Architecture and Art College North China University of TechnologyBeijing 100043China

Community is basic unit of healthy urban *** main space of people’s daily life,community carries various functional needs of food,clothing,housing and *** concept of healthy community development,planning and design of community food system are studied in this paper.A good community food chain plays a positive role in improving people’s happiness and quality of *** this paper,ArcGIS platform is used to build“food map”network *** Bajiao Community in Shijingshan District of Beijing as an example,infl uence weight,spatial distribution and accessibility of food source are studied,and optimization strategies and development suggestions for food system planning and design are fi nally put forward.

关键词： Healthy community Food system Planning and design Bajiao Community

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Characterization of Flame Retardancy and Oil-Water Separation Capacity of Superhydrophobic Silylated Melamine Sponges

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Fluid Dynamics & Materials Processing 2024年第2期20卷 383-400页

作者： Yongchun Liu Ni Qiao Yanli Yang Yanchun Li Chunxiao He Siyang Wang Chengcheng Liu Ruixia Lei Wang Li wenwen gao College of Chemistry and Chemical Engineering FLUOBON Pilot Base of Chemical EngineeringLongdong UniversityQingyang745000China Qingyang Solid and Hazardous Waste Pollution Prevention and Control Management Center Qingyang745000China Gansu Qingluyuan Environmental Monitoring Co. Ltd.Qingyang745000China School of Chemistry and Chemical Engineering Shanxi Key Laboratory of Low Metamorphic Coal Clean UtilizationYulin UniversityYulin719000China

A silylated melamine sponge(SMS)was prepared by two simple steps,namely,immersion and dehydration of a melamine sponge coated with *** silylated structure of SMS was characterized by FT-IR(Fourier-transform infrared)spectroscopy,SEM(Scanning electron microscopy)and in terms of water contact *** oil-water absorption and separation capacities were measured by FT-IR and UV-visible *** experimental results have shown that oligomeric silanol covalently bonds by Si-N onto the surface of melamine sponge *** has shown superhydrophobicity with a water contact angle exceeding 150°±1°,a better separation efﬁciency with regard to diesel oil(by 99.31%(wt/wt%)in oil-water mixture and even up to 99.99%(wt/wt%)for diesel oil in its saturated aqueous ***,SMS inherited the intrinsicﬂame retardancy of the melamine *** general,SMS has shown superhydrophobicity,high porosity,excellent selectivity,remarkable recyclability,and better absorption capacity for various oils and organic solvents,and a high separation efﬁciency for oil in saturated aqueous solutions.

关键词： Methyltrichlorosilane silylated melamine sponge(SMS) superhydrophobicity absorption capacity oil-water separable efﬁciency ﬂame retardancy

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The E3 ubiquitin ligase NEDD4-1 protects against acetaminophen-induced liver injury by targeting VDAC1 for degradation

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Acta Pharmaceutica Sinica B 2023年第4期13卷 1616-1630页

作者： Yiwei Zhu Lin Lei Xinghui Wang Linfang Chen Wei Li Jinxia Li Chenchen Zhao Xiliang Du Yuxiang Song wenwen gao Guowen Liu Xinwei Li State Key Laboratory for Zoonotic Diseases Key Laboratory of Zoonosis ResearchMinistry of EducationCollege of Veterinary MedicineJilin UniversityChangchun 130062China

Acetaminophen(APAP)overdose is a major cause of liver *** precursor cell expressed developmentally downregulated 4—1(NEDD4-1)is an E3 ubiquitin ligase that has been implicated in the pathogenesis of numerous liver diseases;however,its role in APAP-induced liver injury(AILI)is ***,this study aimed to investigate the role of NEDD4-1 in the pathogenesis of *** found that NEDD4-1 was dramatically downregulated in response to APAP treatment in mouse livers and isolated mouse ***-specific NEDD4-1 knockout exacerbated APAP-induced mitochondrial damage and the resultant hepatocyte necrosis and liver injury,while hepatocyte-specific NEDD4-1 overexpression mitigated these pathological events both in vivo and in ***,hepatocyte NEDD4-1 deficiency led to marked accumulation of voltage-dependent anion channel 1(VDAC1)and increased VDAC1 ***,VDAC1 knockdown alleviated AILI and weakened the exacerbation of AILI caused by hepatocyte NEDD4-1 ***,NEDD4-1 was found to interact with the PPTY motif of VDAC1 through its WW domain and regulate K48-linked ubiquitination and degradation of *** present study indicates that NEDD4-1 is a suppressor of AILI and functions by regulating the degradation of VDAC1.

关键词： Acetaminophen NEDD4-1 VDAC1 Liver injury Hepatotoxicity Necrosis Mitochondrial damage Ubiquitination

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Sensitivity Assessment and Optimization Strategy of Climatic Environment in Central Urban Area of Beijing

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Journal of Landscape Research 2021年第6期13卷 1-4页

作者： YANG Xin gao wenwen LI Nana School of Architecture and Art North China University of TechnologyBeijing 100144China Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089China

As one of the methods of urban environmental assessment,sensitivity assessment of urban climatic environment can accurately reflect the problem areas of current urban climate and built environment through visual means,and help cities to carry out sustainable transformation and renewal in the stock era to optimize the living *** the central urban area of Beijing as the research object,the sensitivity of climatic environment was evaluated by meteorological data and built environment element *** results showed that the distribution of sensitive units showed a centrifugal radiation pattern of"high in the center and low in the periphery".Block units with high climate sensitivity were mostly concentrated in Xicheng District and Dongcheng District,accounting for 93%of the total number of *** research showed that complex built environment and lack of elements to regulate climatic environment were the main reasons for the poor local climatic environment in the region with high climate ***,a comprehensive evaluation of the remolding capacity,renewal potential and future development intensity of different grades of climate sensitive units was *** results will provide scientific reference for urban renewal and reconstruction under climatic and environmental changes,so as to promote urban sustainable development and improvement of living environment.

关键词： Central urban area of Beijing Climatic environment Sensitivity Optimization guideline

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基于推理条件和规则的废弃露天矿坑再利用方式选择

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农业工程学报 2018年第11期34卷 253-260页

作者：高文文白中科中国人民大学公共管理学院北京100872 中国地质大学(北京)土地科学技术学院北京100083 国土资源部土地整治重点实验室北京100035

为了更好地实现废弃露天矿坑的再利用,并对再利用方式进行科学的选择,该文以废弃露天矿坑为研究对象,从限制性角度着手提取了矿坑条件、自然条件、其他条件3类17个条件项,形成58个推理条件和13条推理规则,构建了基于"推理条件-推理规则... 详细信息

为了更好地实现废弃露天矿坑的再利用,并对再利用方式进行科学的选择,该文以废弃露天矿坑为研究对象,从限制性角度着手提取了矿坑条件、自然条件、其他条件3类17个条件项,形成58个推理条件和13条推理规则,构建了基于"推理条件-推理规则"的废弃露天矿坑再利用方式选择方法,并运用此方法对平朔煤矿露天矿坑再利用方式进行选择。研究结果表明:经过初步推理,研究区可用于生态保护基地、垃圾填埋场、旅游文娱、光伏发电基地,且这4种再利用方式可进行组合与协调;决策结果需通过更加详细的分析及多方案比选后确定,一般情况下为推理结果的子集,也可能为空集。该研究可为闭矿或即将闭矿的露天矿坑再利用提供参考。

关键词：土地利用复垦煤矿露天矿坑再利用废弃地推理选择

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高校图书馆场景化阅读推广研究

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现代情报 2020年第1期40卷 116-122页

作者：高雯雯海南大学法学院海南师范大学图书馆

[目的/意义]随着高校阅读推广的逐步推进,其同质化的现象越来越凸显,这严重地制约了阅读推广的可持续发展,使阅读推广并未能发挥其应有的效用。深度分析其原因是由于高校对于阅读推广所处环境变化的感知性和应变性较差所致。[方法/过程... 详细信息

[目的/意义]随着高校阅读推广的逐步推进,其同质化的现象越来越凸显,这严重地制约了阅读推广的可持续发展,使阅读推广并未能发挥其应有的效用。深度分析其原因是由于高校对于阅读推广所处环境变化的感知性和应变性较差所致。[方法/过程]针对此问题,基于高校图书馆所处的环境变化,将场景要素纳入高校阅读推广的研究视野,从阅读推广的时间段、阅读推广的空间、阅读推广的受众人群以及阅读推广的方式出发构建了阅读推广的场景化机理和路径,并在此基础上提出了场景化阅读推广策略。[结果/结论]研究结果表明场景视角的高校阅读推广研究直击阅读推广的痛点,不仅丰富了现有阅读推广的理论,也为阅读推广的实践提供了指导。

关键词：场景化思维阅读推广场景化阅读推广高校图书馆

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