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Suitability Evaluation of Rural Settlements Based on Accessibility of Production and Living： A Case Study of Tingzu Town in Hubei Prov- ince of China

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Chinese Geographical Science 2016年第4期26卷 550-565页

作者： LIU yaolin YE Qingqing LI Jiwei KONG Xuesong JIAO Limin School of Resource and Environment Science Wuhan University Wuhan 430079 China Key Laboratory of Geographic Information System Ministry of Education Wuhan University Wuhan 430079 China

Rural settlements are the main carriers of agriculture, rural areas and farmers; thus, optimizing the production and living space of rural settlements is highly significant to rural development. Taking the effective allocation of resources as the starting point, a suitability evaluation system of rural settlements, based on accessibility of production and living, was proposed in this study to provide scientific basis for the optimization of production and living space. The accessibility of production and living was measured by an im- proved two-step floating catchment area method, which considered proximity and availability based on the inclination of rural residents. The suitability evaluation system consisted of traditional suitability evaluation and newly proposed limiting factor identification based on the loss score proportion of suitability. Tingzu Town of Hubei Province, China, was chosen as the case study area. Based on the re- suits of the suitability evaluation system, corresponding suggestions on rural land consolidation, industry division, as well as the layout of health care and education facilities were proposed to optimize the production and living space of rural settlements in Tingzu Town. It is found that the suitability evaluation based on accessibility of production and living is more scientific and accurate than the traditional ones which significantly overestimate production and living convenience. Moreover, the limiting factor identification can help us put forward suggestions according to local conditions and bring about the highly targeted optimization of production and living space of rural settlements.

关键词： rural settlements suitability evaluation accessibility of production and living two-step floating catchment area (2SFCA)method limiting factor identification Tingzu Town

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Re-assessing Vegetation Carbon Storage and Emissions from Land Use Change in China Using Surface Area

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Chinese Geographical Science 2019年第4期29卷 601-613页

作者： HE Qingsong TAN Shukui XIE Peng LIU yaolin LI Jing College of Public Administration Huazhong University of Science & Technology Wuhan 430074 China School of Resource and Environmental Science Wuhan University Wuhan 430079 China

Land surface area estimation can provide basic information for accurately estimating vegetation carbon storage under complex terrain. This study selected China, a country dominated by mountains, as an example, and calculated terrestrial vegetation carbon storage(VCS) for 2000 and 2015 using land surface area and traditional ellipsoid area. The land surface area is estimated by a triangular network on the high precision digital elevation *** results showed that: 1) The VCS estimated by the surface area measurement in 2000 and 2015 were 0.676 and0.692 Pg C(1 Pg = 1015 g) higher than the VCS calculated using the ellipsoid area, respectively. 2) As the elevation increases, the differences between VCS estimated by surface area measurement and ellipsoid area measurement are expanding. Specially, a clear gap was present starting from an elevation of 500 m, with the relative error exceeds8.99%. 3) The total amount of carbon emitted due to land use change reached 0.114 Pg C. The conversions of forestland and grassland to other land use type are the main reasons of the loss of vegetation carbon storage, resulting in a total amount of biomass carbon storage decreased by 0.942 and 0.111 Pg C, respectively. This study was a preliminary exploration of incorporating land surface area as a factor in resource estimation, which can help more accurately understand the status of resources and the environment in the region.

关键词： carbon storage land use change surface area resource estimation ellipsoidal area China

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Chinese American Caregivers’Attitudes Toward Tube Feeding for Persons with Dementia-USA,2021–2022

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China CDC weekly 2022年第47期4卷 1051-1054,I0001-I0002页

作者： yaolin Pei Xiang Qi Zhen Cong Bei Wu Rory Meyers College of Nursing New York UniversityNew YorkUSA School of Social Work University of Texas at ArlingtonArlingtonUSA.

Summary What is already known about this topic?Little is known about Chinese American dementia caregivers’attitudes toward tube *** is added by this report?To address this knowledge gap,the paper seeks to characterize participants’attitudes toward tube feeding based on a survey conducted among Chinese American dementia *** are the implications for public health practice?It is crucial to develop culturally tailored interventions to promote knowledge on tube feeding and advance care planning engagement in Chinese American communities.

关键词： Care knowledge feeding

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pH-dependent leaching behaviour and other performance properties of cement-treated mixed contaminated soil

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Journal of Environmental Sciences 2012年第9期24卷 1630-1638页

作者： Reginald B. Kogbara Abir Al-Tabbaa yaolin Yi Julia A. Stegemann Geotechnical and Environmental Group Cambridge University Engineering Department Trumpington Street Cambridge CB2 1PZ UK. Center of ExceUence in Environmental Studies King Abdulaziz University Jeddah 21589 Saudi Arabia Institute of Geotechnical Engineering Southeast University 2# Sipailou Nanjing 210096 China Department of Civil Environmental and Geomatic Engineering Chadwick Building University College London WCIE 6BT UK

Portland cement has been widely used for stabilisation/solidification （S/S） treatment of contaminated soils. However, there is a dearth of literature on pH-dependent leaching of contaminants from cement-treated soils. This study investigates the leachability of Cu, Pb, Ni, Zn and total petroleum hydrocarbons （TPH） from a mixed contaminated soil. A sandy soil was spiked with 3000 mg/kg each of Cd, Cu, Pb, Ni and Zn, and 10,000 mg/kg of diesel, and treated with ordinary Portland cement （CEM I）. Four different binder dosages, 5%, 10%, 15% and 20% （m/m） and different water contents ranging from 13%-19% dry weight were used in order to find a safe operating envelope for the treatment process. The pH-dependent leaching behaviour of the treated soil was monitored over an 84-day period using a 3-point acid neutralisation capacity （ANC） test. The monolithic leaching test was also conducted. Geotechnical properties such as unconfined compressive strength （UCS）, hydraulic conductivity and porosity were assessed over time. The treated soils recorded lower leachate concentrations of Ni and Zn compared to the untreated soil at the same pH depending on binder dosage. The binder had problems with Pb stabilisation and TPH leachability was independent of pH and binder dosage. The hydraulic conductivity of the mixes was generally of the order, 10-8 m/sec, while the porosity ranged from 26%--44%. The results of selected performance properties are compared with regulatory limits and the range of operating variables that lead to acceptable performance described.

关键词： diesel heavy metals hydraulic conductivity porosity Portland cement stabilisation/solidification

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Exploring the spatio-temporal impacts of farmland reforestation on ecological connectivity using circuit theory:A case study in the agro-pastoral ecotone of North China

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Journal of Geographical Sciences 2020年第9期30卷 1419-1435页

作者： LIU Xiaojing LIU Dianfeng ZHAO Hongzhuo HE Jianhua LIU yaolin School of Resource and Environmental Science Wuhan UniversityWuhan 430079China Key Laboratory of Digital Cartography and Land Information Engineering Ministry of Natural ResourcesWuhan UniversityWuhan 430079China Collaborative Innovation Center for Geospatial Information Science Wuhan UniversityWuhan 430079China

Farmland reforestation can contribute substantially to ecological *** studies have extensively examined the ecological effects of farmland reforestation,but few of them have investigated the spatiotemporal responses of broad-scale landscape connectivity to *** using a typical agro-pastoral ecotone in northern China as a case study,we addressed this issue based on an innovative integration of circuit theory approach and counterfactual *** forest connectivity through multiple dispersal pathways was measured using the circuit theory approach,and its spatiotemporal changes after reforestation were evaluated by counterfactual *** results showed that from 2000–2015,the reforested farmland occupied 2095 km^2,and 12.5% was on steeply sloped *** reforestation caused a greater increase in ecological connectivity by adding new ecological corridors and stepping stones in scattered forest areas rather than in areas with dense forest *** newly added corridors and stepping stones were fragmented,short and narrow and thus deserve powerful *** reforestation to improve landscape connectivity should highlight pinch point protection and obstacle removal as well as the tradeoff between farmland loss and farmer *** findings are expected to inform the optimization of the Grain for Green policy from the perspective of broad-scale biodiversity conservation.

关键词： farmland reforestation ecological connectivity circuit theory land use change agro-pastoral ecotone China

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Submicron Volume Roughness & Asperity Contact Friction Model for Principle Slip Surface in Flash Heating Process

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Journal of Earth Science 2015年第1期26卷 96-107页

作者： Bojing Zhu David A.Yuen yaolin Shi Huihong Cheng Carbon Capture & Store & Rock Mechanics & Fluid Dynamic Laboratory Department of Earth SciencesDurham UniversityDH1 3LEUK Department of Earth Sciences and Minnesota Supercomputing Institute University of MinnesotaMinneapolis MN 55455USA School of Environmental Studies China University of Geosciences Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences College of Earth ScienceUniversity of Chinese Academy of Sciences

Based on focused ion beam and shear friction apparatus data, the multi-resolutions （0.2 nm-5μm） volume roughness ＆ asperity contact （VR ＆ AC） three-dimensional structure on principle slip surface interface-surface （PSS-IS） is measured on high performance computational platform; and physical plastic-creep friction model is established by using hybrid hyper-singular integral equation ＆ lattice Boltzmann ＆ lattice Green function （BE-LB-LG）. The correlation of rheological property and VR ＆ AC evolution under transient （10 μs） macro-normal stress （18-300 MPa） and slip rate （0.25-7.5 m/s） are obtained; and the PSS-IS friction in co-seismic flash heating is quantitative analyzed for the first time.

关键词： VR & AC BE-LB-LC submicron-scale structure measurement plastic-creep model,friction model.

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Feasibility of Estimating Heavy Metal Contaminations in Floodplain Soils Using Laboratory-Based Hyperspectral Data—A Case Study Along Le’an River, China

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Geo-Spatial Information Science 2011年第1期14卷 10-16页

作者： LIU yaolin LI Wei WU Guofeng XU Xinguo School of Resource and Environmental Science. Wuhan University 129 Luoyu Road Wuhan 430079 China Key Laboratory of Geographic Information System Ministry of Education Wuhan University 129 Luoyu Road Wuhan430079 China Sichuan Zhongshui-chengkanyuan Surveying and Mapping Engineering Company Chengdu 610072 China

It is necessary to estimate heavy metal concentrations within soils for understanding heavy metal contaminations and for keeping the sustainable developments of *** study,with the floodplain along Le'an River and its two branches in Jiangxi Province of China as a case study,aimed to explore the feasibility of estimating concentrations of heavy metal lead(Pb),copper(Cu) and zinc(Zn) within soils using laboratory-based hyperspectral *** soil samples were collected,and their hyperspectral data,soil organic matters and Pb,Cu and Zn concentrations were measured in the *** potential relations among hyperspectral data,soil organic matter and Pb,Cu and Zn concentrations were explored and further used to estimate Pb,Cu and Zn concentrations from hyperspectral data with soil organic matter as a *** results showed that the ratio of the first-order derivatives of spectral absorbance at wavelengths 624 and 564 nm could explain 52% of the variation of soil organic matter;the soil organic matter could ex-plain 59%,51% and 50% of the variation of Pb,Cu and Zn concentrations with estimated standard errors of 1.41,48.27 and 45.15 mg·kg-1;and the absolute estimation errors were 8%-56%,12%-118% and 2%-22%,and 50%,67% and 100% of them were less than 25% for Pb,Cu and Zn concentration *** concluded that the laboratory-based hyperspectral data hold potentials in esti-mating concentrations of heavy metal Pb,Cu and Zn in *** sampling points or other potential linear and non-linear regression methods should be used for improving the stabilities and accuracies of the estimation models.

关键词： soil heavy metal concentration estimation soil organic matter hyperspectral data

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Finite element analysis of steep excavation slope failure by CFS theory

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Earthquake Science 2012年第2期25卷 177-185页

作者： Huihong Cheng Huai Zhang Bojing Zhu yaolin Shi Key Laboratory of Computational Geodynamics Chinese Academy of SciencesBeijing 100049China College of Earth Sciences Graduate University of Chinese Academy of SciencesBeijing 100049China

The distribution of Coulomb failure stress （CFS） change in the steep excavation slope is calculated by finite element method in this paper, and the failure mechanics under different conditions have been investigated. Comparing the CFSs before and after the slope excavation （stress loading and unloading processes）, the dangerous internal zone and the most likely failure external area are attained. Given the shear cracks on the top surface while tensile stress or cracks along the toe of the slope, we analyze the high cutting-angle steep slope in Kaixian county of the Three Gorges Reservoir region. We bring forward that the peak value of CFS after excavation can reach to the order of 0.1 MPa, which is greatly higher than that of before. Our preliminary results are useful for optimizing the reinforcement structure during the steep slope stabilization engineering.

关键词： Coulomb failure stress stabilization and failure evaluation steep slope excavation

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Application of flow driven pore-network crack model to Zipingpu reservoir and Longmenshan slip

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Science China(Physics,Mechanics & Astronomy) 2011年第8期54卷 1532-1540页

作者： ZHU BoJing LIU Chang SHI yaolin SUN DongSheng ZHANG Kai Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences College of Earth Science Graduate University of Chinese Academy of Sciences Beijing 100049 China Laboratoire De Geologie Ecole Norrnale Superieure 24 Rue Lhomond 75231 Paris CEDEX 5 France Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China

The study has analyzed the relationship between the water-drainage sluice process of reservoir, stress triggers and shadows of earthquake and porosity variability of fault slip zone. First, the pore pressure, pressure gradient, viscous stress and Reynolds stress to reservoir-earthquake fault slip problem are analyzed, and these are un-negligible factors of the extended coulomb failure stress under ultra-high temperature and pressure condition. Second, the porosity tensor and permeability tensor are studied, the relationship between Zipingpu reservoir and Longmenshan slip has been analyzed, and the extended viscous stress and Reynolds stress as function of time and infiltration process are obtained. Last, some primary conclusions about the flow-solid coupled facture mechanism to the Zipingpu reservoir and Longmenshan slip problem are presented, which can help understand the flow-solid coupled facture mechanism of reservoir-coseismic fault slip problem.

关键词： Zipingpu reservoir 2008 Wenchuan earthquake coulomb failure stress diffusion pore stress diffusion fluid flow driven pore-network crack model

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甘肃河西地区鲜食葡萄经济收益分析

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防护林科技 2024年第6期 1-5页

作者：方青春孙涛王耀琳刘开琳李银科闫沛迎秦森李硕武威市生产力促进中心甘肃武威733000 甘肃省治沙研究所/甘肃省荒漠化与风沙灾害防治重点实验室-省部共建国家重点实验室培育基地甘肃兰州730030 甘肃武威绿洲生态研究站甘肃武威733000 甘肃省酒泉市敦煌市七里镇农技服务队甘肃酒泉敦煌736200 永登县农业技术推广中心甘肃兰州730300

以甘肃省河西地区种植的鲜食葡萄为研究对象,采用农户基线调查方法对不同种植区鲜食葡萄的生产投入和各项农资支出等要素进行实地调查,并对不同种植区、不同栽培方式的葡萄林地的投入产出、经济收益等作了比较分析。结果表明:2021年度... 详细信息

以甘肃省河西地区种植的鲜食葡萄为研究对象,采用农户基线调查方法对不同种植区鲜食葡萄的生产投入和各项农资支出等要素进行实地调查,并对不同种植区、不同栽培方式的葡萄林地的投入产出、经济收益等作了比较分析。结果表明:2021年度甘肃河西走廊地区葡萄每667 m^(2)年均产量为1360 kg,总收入为9180.26元,其中,葡萄种植过程中劳动力投入占比最高,为57.21%;其次为农资支出费用,占比近40%;燃动费用占比仅为3.66%。鲜食葡萄每667 m^(2)年均净收益为2953.19元,投入产出比为2.11∶1,平均利润率为47.42%。不同栽培方式的鲜食葡萄经济收益不同:温室葡萄每667 m^(2)总收入为12060.5元,净收益为3309.99元,投入产出比2.72∶1;露地葡萄每667 m^(2)总收入5339.75元,净收益为2862.30元,投入产出比1.25∶1。全省每667 m^(2)平均葡萄产量为1360 kg,净收益为2953.00元。甘肃河西地区葡萄种植产业经济效益可观。

关键词：甘肃河西鲜食葡萄投入产出经济收益

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