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Quantifying the impact of earthquakes and geological factors on spatial heterogeneity of debris-flow prone areas:A case study in the Hengduan Mountains

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Journal of Mountain Science 2024年第5期21卷 1522-1533页

作者： HU Xudong SHEN Yitong HU Kaiheng XU Wennian LIU Daxiang HE Songtang gao Jiazhen WEI Li LIU shuang Hubei Provincial Engineering Research Center of Slope Habitat Construction Technique Using Cement-based Materials(China Three Gorges University) Yichang 443002China Hubei Key Laboratory of Disaster Prevention and Mitigation(China Three Gorges University) Yichang 443002China College of Civil Engineering and Architecture China Three Gorges UniversityYichang 443002China Shanghai Investigation Design&Research Institute Co.Ltd.Shanghai 200335China Key Laboratory of Mountain Hazards and Earth Surface Processes Chinese Academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China Wuhan Polytechnic Wuhan 430074China

Understanding the spatial heterogeneity of debris-flow-prone areas holds significant implications for regional risk management, particularly in seismically active regions with geological faults. Despite the significance of this knowledge, a comprehensive quantification of the influence of regional topographical and geological factors on the spatial heterogeneity of debris-flow-prone areas has been lacking. This study selected the Hengduan Mountains, an earthquake-prone region characterized by diverse surface conditions and complex landforms, as a representative study area. An improved units zoning and objective factors identification methodology was employed in earthquake and fault analysis to assess the impact of seismic activity and geological factors on spatial heterogeneity of debrisflow prone areas. Results showed that the application of GIS technology with hydrodynamic intensity and geographical units analysis can effectively analyze debris-flow prone areas. Meanwhile, earthquake and fault zones obviously increase the density of debrisflow prone catchments and make them unevenly distributed. The number of debris-flow prone areas shows a nonlinear variation with the gradual increase of geomorphic factor value. Specifically, the area with 1000 m-2500 m elevation difference, 25°-30° average slope, and 0.13-0.15 land use index is the most favorable conditions for debris-flow occurrence;The average annual rainfall from 600 to 1150 mm and landslides gradient from 16° to 35° are the main causal factors to trigger debris flow. Our study sheds light on the quantification of spatial heterogeneity in debris flow-prone areas in earthquake-prone regions, which can offer crucial support for post-debris flow risk management strategies.

关键词： debris-flow prone areas causal factors GIS-based method spatial heterogeneity Hengduan Mountains

Characterization of UV-curable Poly（ethylene glycol） Diacrylate Based Hydrogels

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Chemical Research in Chinese Universities 2015年第6期31卷 1046-1050页

作者： QIN Xuzhen HU Qianqian gao Guanghui GUAN shuang School of Chemistry and Life Science Advanced Institute of Materials Science Changchun University of Technology Changchun 130012 P. R. China

Poly（ethylene glycol） diacrylate/polyvinyl alcohoI（PEGDA/PVA） hydrogels were prepared from PEGDA and PVA as precurors by means of single UV radiation（UV ra.）, UV radiation followed by high energy electron beam irradiation（Irra.）, UV radiation followed by freeze-thawing（FT） or UV ra. and Irra. followed by FT, respectively. 2-Hydroxy-l-[4-（hydroxyethoxy）phenyl]-2-methyl-l-propanone（Irgacure 2959） was used as a photoinitiator. The effects of the various methods on the swelling and mechanical properties of the hydrogels were investigated. The results show that hydrogels made by UV ra. plus high energy electron beam irradiation followed by FT showed a higher crosslinking density and a larger tensile strength than those made by the other methods.

关键词： Poly(ethylene glycol) diacrylate Polyvinyl alcohol Hydrogel UV radiation

Creation of passivated Nb/N p-n co-doped ZnO nanoparticles and their enhanced photocatalytic performance under visible light illumination

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Journal of Materials Science & Technology 2019年第4期35卷 610-614页

作者： shuang gao Weiyi Yang Jun Xiao Bo Li Qi Li Division of Energy and Environment Graduate School at ShenzhenTsinghua University Environment Functional Materials Division Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of Sciences

Passivated niobium/nitrogen(Nb-N) p-n co-doped zinc oxide nanoparticles were created by a simple precipitation process with in-situ self-formed NaCl "cage" to confine the nanoparticle growth followed by the heat treatment in a flow of ammonia gas. Enhanced optical absorbance into the visible light region was observed in the Nb/N co-doped ZnO nanoparticle photocatalyst due to the Nb/N co-doping *** demonstrated a largely enhanced photocatalytic performance in the disinfection of Escherichia coli bacteria under visible light illumination, which could be attributed to the passivated co-doping of NbN to suppress the photogenerated charge carrier recombination on dopants. This robust approach for passivated p-n co-doping may also be applied to other material systems for a wide range of technical applications.

关键词： Zinc oxide Nanoparticles Passivated Nb/N p-n Co-doping Photocatalyst Visible light

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飞行员膳食调查及军人膳食平衡指数评价

中国疗养医学 2024年第9期33卷 16-19页

作者：赵颖李绍建苏艳萍张春媛高秋爽孙小雅裴素萍联勤保障部队北戴河康复疗养中心河北秦皇岛066100 联勤保障部队第980医院河北石家庄050082

目的评估飞行员膳食营养状况,为指导飞行人员合理膳食提供依据。方法选择某部95名飞行员为调查对象,采用称重法进行膳食调查,用军人膳食平衡指数(DBI)评价飞行员膳食质量。结果与GJB 826C-2022《军人食物定量》标准比较,除了畜肉、植物... 详细信息

目的评估飞行员膳食营养状况,为指导飞行人员合理膳食提供依据。方法选择某部95名飞行员为调查对象,采用称重法进行膳食调查,用军人膳食平衡指数(DBI)评价飞行员膳食质量。结果与GJB 826C-2022《军人食物定量》标准比较,除了畜肉、植物油达标外,摄入量超标的食物有禽蛋、盐,摄入量不足的有大豆、奶及奶制品、禽肉、水果、粮食、水产类、蔬菜,分别为标准的13%、17%、28%、36%、57%、58%、64%。蛋白质、脂肪和碳水化合物的供能比分别为17%、44%、39%,比例明显不均衡。军人DBI评分显示,被调查飞行人员存在中等程度的摄入不足和低度摄入过量。结论膳食结构不合理,三大产能营养素供能比例不均衡,呈现“低碳水化合物、高蛋白、高脂肪”的饮食模式。军人DBI评分存在中度膳食失衡,体质量超重者比例偏高。建议调整膳食结构,减少蛋类食物摄入,减少食盐及调味品用量,增加大豆(非飞行日)、禽肉、奶及奶制品、水产类、蔬菜、水果的摄入量。

关键词：飞行员膳食调查膳食平衡指数

Intensified photocatalytic degradation of nitrobenzene by Pickering emulsion of ZnO nanoparticles

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Particuology 2010年第5期8卷 453-457页

作者： Wei Wu shuang gao Weixia Tu Jianfeng Chen Pengyuan Zhang Key Laboratory for Nanomaterials Ministry of Education Beijing University of Chemical Technology Beijing 100029 China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing 100029 China

In this paper, zinc oxide nanoparticles were first prepared and surface-modified. A Pickering emulsion was then prepared, consisting of nitrobenzene （oil phase）, water （water phase） and the modified zinc oxide nanoparticles located on the water-oil interface. The effects of different emulsions on the removal rate of nitrobenzene by photocatalytic degradation were studied. The results proved that use of a Pickering emulsion stabilized by surface-modified ZnO nanoparticles provides an effective and novel way to intensify the photocatalytic degradation of the organic contaminant.

关键词： Pickering emulsionZinc oxidePhotocatalysisNitrobenzene

Influences of Cooling Rate After Solution Treatment on Microstructural Evolution and Mechanical Properties of Superalloy Rene 80

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Acta Metallurgica Sinica(English Letters) 2017年第3期30卷 261-271页

作者： shuang gao Jie-Shan Hou Kai-Xin Dong Lan-Zhang Zhou Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China

Influences of the cooling rate after solution treatment on microstructural evolution and mechanical properties of Rene 80 nickel-based superalloy were investigated by optical microscopy, scanning electron microscopy, transmission electron microscopy and mechanical test. Results showed that the high cooling rate decreased the size of secondary γ＇particles in the supersaturated matrix, but led to a high coarsening rate of γ＇ particles during subsequent aging treatment. Despite various coarsening rates, the size and morphology of γ＇ particles in the final microstructures of all samples were close due to the long enough holding time to an equilibrium state. During the aging of 870 ℃/2 h, primary MC started to decompose with the carbide reaction： MC ＋ γ＇ --＊ MrC or M23C6 -t- γ＇. And a number of observations showed that the coarsening of γ＇ particles on grain boundaries resulted in the depletion of γ＇ during aging treatment. The test results indicated that high cooling rate resulted in the presence of quench crack, and the air cooling method following solution treatment was an optimum heat treatment method for Rene 80.

关键词： Ni-based superalloy Cooling rate Precipitates Ripening theory Heat treatment Microstructural evolution

Mechanical behavior of concrete filled glass fiber reinforced polymer-steel tube under cyclic loading

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 778-788页

作者： Chun-yang ZHU Ying-hua ZHAO shuang gao Xiao-fei LI Institute of Road and Bridge Engineering Dalian Maritime University

The mechanical behavior of concrete-filled glass fiber reinforced polymer(GFRP)-steel tube structures under combined seismic loading is investigated in this study. Four same-sized specimens with different GFRP layout modes were tested by a quasi-static test system. Finite element analysis(FEA) was also undertaken and the results were presented. Results of the numerical simulation compared well with those from experimental tests. Parametric analysis was conducted by using the FE models to evaluate the effects of GFRP thickness, axial compression rate, and cross sectional steel ratio. The experimental and numerical results show that the technique of GFRP strengthening is effective in improving the seismic performance of traditional concrete-filled steel tubes, with variations related to different GFRP layout modes.

关键词： Concrete-filled glass fiber reinforced polymer(GFRP)-steel tube Seismic Energy dissipation Stiffness degradation

Gangba sheep in the Tibetan plateau:Validating their unique meat quality and grazing factor analysis

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Journal of Environmental Sciences 2021年第3期33卷 117-122页

作者： Qiangying Zhang Ming Que Wei Li shuang gao Xin Tan Duo Bu School of Science Tibet UniversityLhasa 850000TibetChina Middle School of Gangba County Xigaze 857700TibetChina

Gangba sheep are known for having typical sensory characteristics attributed to free range conditions and grazing on wild *** genuine Gangba mutton was selected as the experimental group,and the commercial Tibetan mutton was selected as the control group,the nutritive composition of basic chemical components,amino acids and fatty acids in mutton were investigated to correlate its unique meat quality and eating *** results showed that fatty acids were significantly higher(P<0.05)in Gangba mutton than in commercial mutton,and the higher content of flavoring amino acids(glutamic acid and aspartame)were primarily responsible for the taste attributes umami of meat ***,the trace elements analysis in mutton and grazing factors(forage,water source and soil)were conducted,to explain the source of essential trace elements in *** concentrations of essential trace elements show that the Gangba mutton was a valuable source for highly available Cu and Zn in human nutrition,and well managed with few detected of toxicity *** concentrations of essential trace elements in mutton are closely related to the trace elements in environmental grazing *** conclusion,the congenital grazing conditions(a highly mineralized water resource,natural forages and clean soils)were shown to contribute to the unique meat characteristics of Gangba sheep.

关键词： Gangba sheep Mutton quality Amino acids Fatty acids Mineral elements

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中国能源产业要素配置的统计测度与效率损失

技术经济与管理研究 2022年第9期 94-99页

作者：高爽呼伦贝尔学院经济管理学院内蒙古呼伦贝尔021008 特华博士后科研工作站北京100069

文章选取2006—2020年中国30个省份能源产业面板数据,测算能源产业要素配置状况与效率损失。研究发现,中国能源产业存在明显要素错配现象,且部分子行业要素错配呈现加剧态势。能源产业要素错配具有显著区域异质性和行业异质性;能源开采... 详细信息

文章选取2006—2020年中国30个省份能源产业面板数据,测算能源产业要素配置状况与效率损失。研究发现,中国能源产业存在明显要素错配现象,且部分子行业要素错配呈现加剧态势。能源产业要素错配具有显著区域异质性和行业异质性;能源开采区要素配置较为合理,能源加工区次之,能源均衡区要素错配最明显;不同能源行业中要素供给不足与过剩现象并存。要素错配对于能源产业产出缺口、产出变动以及全要素生产率损失贡献具有显著异质性,区域间的要素错配损失贡献更高。由此,提出加快推动新技术渗透、促进产业链纵向延伸、鼓励多种资本运营等建议,以期为能源产业高质量发展提供有益参考。

关键词：能源产业要素错配全要素生产率效率损失