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Spatial Pattern of Rural Settlements in the Upper Reaches of the Minjiang River——a Case Study in Maoxian County, Sichuan

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Journal of Mountain Science 2007年第2期4卷 146-154页

作者： FENG Werdan li ainong ZHOU Wancun Chengdu Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041SichuanChina Graduate School of Chinese Academy of Sciences Beijing 100039 China Chengdu Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041Sichuan China

A quantitative analysis of the spatial pattern of rural settlements in the upper reaches of the Minjiang River was made with the major data sources being the relevant ETM image and the national geographical database of China （including contour line, fiver and road） at the scale of 1：250000, and using image interpretation and field investigation to obtain spatial information on rural settlements. The results of the spatial analysis technique of GIS and correlation analysis showed that most settlements （78.2 %） were located in the mountain area at 1500-2700 m altitude, and almost half in the arid valley area. More than 80.0 % of settlements had their slopes above 15°. Most settlements had good access to water resources, roads and communications, and tended to cluster close to the road network rather than the fiver. About half of the rural settlements in the study area were relatively concentrated, while the others were decentralized. Those with higher altitude usually had land with steep slope, inconvenient water and road accesses, and were located far apart from each other. In view of such a situation, further research should be done to make reasonable countermeasures on these settlements for better living conditions and ecosystem stability.

关键词： Rural settlement spatial pattern GIS Maoxian County China

Comprehensive evaluation and analysis of a nearly zero-energy building heating system using a multi-source heat pump in severe cold region

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Building Simulation 2023年第10期16卷 1949-1970页

作者： Lei Zhang Guohui Feng ainong li Kailiang Huang Shasha Chang School of Municipal and Environmental Engineering Shenyang Jianzhu UniversityShenyang110168China

The integrated application of multi-energy coupled technology in nearly zero-energy building(NZEB)is promising from the perspective of low-carbon development to achieve the goal of net zero ***(photovoltaic/thermal),air,and ground sources were combined organically to establish an experimental platform of a multi-source heat pump(MSHP)system,which can realize flexible switching of multi-energy *** paper presents the analytical hierarchy process and fuzzy comprehensive evaluation method to comprehensively evaluate the five modes of the MSHP system with regard to energy,economic and environmental *** results indicate that the waste heat of the PVT cavity can improve the coefficient of performance of the heat pump unit(COP)by approximately 8.0%.The initial investment in air source heat pump(ASHP)modes is lower than that of a coal-powered *** ground source heat pump(GSHP)modes have high stability and their payback period is 8.81–10.66 *** photovoltaic/thermal-dual source heat pump(PVT-DSHP)mode presents the most appropriate system applied in the NZEB in severe cold region,followed by the DSHP,GSHP,ASHP,and PVT-ASHP *** compared with other modes,COP,annual saving cost,carbon dioxide emission reduction,and comprehensive value of the PVT-DSHP mode have improved by 7.07%–29.57%,2.21%–23.88%,3.38%–14.83%,and 27.91%–52.62%,*** study provides important insights into the practical application and sustainable development of multi-energy coupled systems in the NZEB in severe cold region.

关键词： multi-energy complementarity photovoltaic/thermal heat pump nearly zero-energy building hierarchy process severe cold region

A review of land use/land cover change mapping in the China-Central Asia-West Asia economic corridor countries

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Big Earth Data 2021年第2期5卷 237-257页

作者： Amin Naboureh Jinhu Bian Guangbin Lei ainong li Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina University of Chinese Academy of Sciences BeijingChina

Large-scale projects,such as the construction of railways and highways,usually cause an extensive Land Use Land Cover Change(LULCC).The China-Central Asia-West Asia Economic Corridor(CCAWAEC),one key large-scale project of the Belt and Road Initiative(BRI),covers a region that is home to more than 1.6 billion *** numerous studies have been conducted on strategies and the economic potential of the Economic Corridor,reviewing LULCC mapping studies in this area has not been *** study provides a comprehensive review of the recent research progress and discusses the challenges in LULCC monitoring and driving factors identifying in the study *** review will be helpful for the decision-making of sustainable development and construction in the Economic *** this end,350 peer-reviewed journal and conference papers,as well as book chapters were analyzed based on 17 attributes,such as main driving factors of LULCC,data collection methods,classification algorithms,and accuracy assessment *** was observed that:(1)rapid urbanization,industrialization,population growth,and climate change have been recognized as major causes of LULCC in the study area;(2)LULCC has,directly and indirectly,caused several environmental issues,such as biodiversity loss,air pollution,water pollution,desertification,and land degradation;(3)there is a lack of well-annotated national land use data in the region;(4)there is a lack of reliable training and reference datasets to accurately study the long-term LULCC in most parts of the study area;and(5)several technical issues still require more attention from the scientific ***,several recommendations were proposed to address the identified issues.

关键词： Land use change land cover change China-Central Asia-West Asia Economic Corridor accuracy assessment reference data classification algorithm

Integrated Evaluation Model for Eco-Environmental Quality in Mountainous Region Based on Remote Sensing and GIS

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 969-976页

作者： li ainong WANG Angsheng HE Xiaorong FENG Wenlan ZHOU Wancun Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 Sichuan China Graduate University of Chinese Academy of Sciences Beijing 100049China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029 China School of Resources and Environmental Engineering Wuhan University of Technology Wuhan 430070 Hubei China

Based on Remote Sensing （RS）, Geographic Information System （GIS）, and combining Principal Component Analysis, this paper designed a numerical integrated evaluation model for mountain eco-environment on the base of grid scale. Using this model, we evaluated the mountain eco-environmental quality in a case study area-the upper reaches of Minjiang River, and achieved a good result, which accorded well with the real condition. The study indicates that, the integrated evaluation model is suitable for multi-layer spatial factor computation, effectively lowing man＇s subjective influence in the evaluation process; treating the whole river basin as a system, the model shows full respect to the circulation of material and energy, synthetically embodies the determining impact of such natural condition as water-heat and landform, as well as human interference in natural eco-system; the evaluation result not only clearly presents mountainous vertical distribution features of input factors, but also provides a scientific and reliable thought for quantitatively evaluating mountain eco-environment.

关键词： eco-environment evaluation model spatial principal component analysis RS (remote sensing) GIS (geographic information system)

Dataset of the mountain green cover index(SDG15.4.2)over the economic corridors of the Belt and Road Initiative for 2010-2019

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Big Earth Data 2022年第1期6卷 77-89页

作者： Jinhu Bian ainong li Xi Nan Guangbin Lei Zhengjian Zhang Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina

Mountains are undergoing widespread changes caused by human activities and climate *** the importance of mountains,the protection and sustainable development of mountain ecosys-tems have been listed as the goals of the United Nations 2030 Sustainable Development *** one of the indicators,the Mountain Green Cover Index(MGCI)datasets can provide consis-tent and comparable status of green vegetation in mountainous areas,which can support the mapping of heterogeneous mountain ecosystem health and monitoring changes over *** produc-tion of explicitly high-spatial-resolution MGCI datasets is therefore urgently needed to support the protection measures at subnational and multitemporal *** this paper,the MGCI datasets with 500-meter spatial resolutions,covering the economic corridors of the Belt and Road Initiative(BRI),were developed for 2010 to 2019 based on all available Landsat-8 data and the Google Earth Engine cloud computing *** validation of green vegeta-tion cover with the ground-truth samples indicated that the data-sets can achieve an overall accuracy of 94.06%,with well-detailed spatial and temporal *** archived datasets include the MGCI of each BRI economic corridor,matched to a geospatial layer denoting the economic corridor *** essential informa-tion of the datasets and their limitations,along with the production flow,were described in this paper.

关键词： Sustainable development goals(SDGs) mountain green cover index(MGCI) dataset Belt and Road Landsat

The inhibiting effect of 1.4 recombinant P chromosome of wheat-Agropyron cristatum addition line on the Ph gene

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Chinese Science Bulletin 2010年第2期55卷 153-157页

作者： YANG GuoHui YANG XinMing WANG RuiHui GAO ainong li liHui liU WeiHua National Key Facility for Crop Gene Resources and Genetic bnprovement/lnstitute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081 China

P chromosomes may carry a genetic system that inhibits the Ph gene in wheat. Abnormal chromosome synapsis in wheat-Agropyron cristatum addition line II-21-2 (additional 1·4 recombinant P chromosome) was observed in this study. The results of cytogenetics and Ph1 gene amplification showed that the Ph1 gene was normal and the average number of quadrivalents or hexavalents was determined to be 0.41 and 0.13, respectively, in pollen-mother cells of wheat-Agropyron cristatum addition line II-21-2. The analysis of dual-color GISH/FISH showed that the P chromosomes were not directly involved in the composition of multivalents but could inhibit the effect of the Ph gene, leading to synapsis of wheat homoeologous chromosomes and translocation between wheat homoeologous chromosomes such as 3B-3D chromosomes. The characteristic of P chromosomes’ promoting synapsis of wheat homoeologous chromosomes may have potential application in the genetic improvement of wheat.

关键词：染色体重组 Ph基因附加系小麦抑制作用冰草同源染色体电话

Improved modeling and analysis of the patch size–frequency distribution of forest disturbances in China based on a Landsat forest cover change product

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International Journal of Digital Earth 2021年第2期14卷 181-201页

作者： Dan-Xia Song Chengquan Huang Tao He Joseph O.Sexton ainong li Sike li Hao Wu John R.Townshend College of Urban and Environmental Sciences Central China Normal UniversityWuhanPeople’s Republic of China Hubei Provincial Key Laboratory for Geographical Process Analysis and Simulation Central China Normal UniversityWuhanPeople’s Republic of China Department of Geographical Sciences University of MarylandCollege ParkMDUSA School of Remote Sensing and Information Engineering Wuhan UniversityWuhanPeople’s Republic of China terraPulse IncGaithersburgMDUSA Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengduPeople’s Republic of China School of Earth Atmosphere and EnvironmentMonash University–Clayton CampusVictoriaAustralia

Forest disturbances have been altering the ecological properties of ecosystems;meanwhile,disturbance events of varying sizes create different structures and functions for a forest ***,size and frequency are important attributes of disturbances,and their relationship should be *** present a hierarchical method through the modeling of the overall trend of the size–frequency distribution and the characterization of the non-constant variances of disturbance sizes at each frequency *** method was demonstrated to accurately model the sizes as well as the corresponding frequencies;thus,the total disturbed area and number of disturbance patches were both accurately *** applying the method to 13 provinces in China,consistent patterns were revealed by the modeling results and remote-sensing-based product,showing that between 2000 and 2005,forests in most provinces were dominated by moderate disturbances(10 ha1000 ha)occurred in the northeastern and northwestern *** study concludes that the proposed method can improve the representation of the size–frequency distribution of forest disturbances.

关键词： Forest disturbance patch size remote sensing forestry

GIS-Based Spatial Analysis and Modeling for Landslide Hazard Assessment:A Case Study in Upper Minjiang River Basin

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 847-852页

作者： FENG Wenlan ZHOU Qigang ZHANG Baolei ZHOU Wancun li ainong ZHANG Haizhen XIAN Wei Institute of Mountain Hazards and Environment Chinese Academy ofSciences Chengdu 610041 Sichuan China Graduate University of Chinese Academy of Sciences Beijing 100049China Department of Envioronmental Engineering Chengdu University of Information Technology Chengdu 610225 Sichuan China

By analyzing the topographic features of past landslides since 1980s and the main land-cover types （including change information） in landslide-prone area, modeled spatial distribution of landslide hazard in upper Minjiang River Basin was studied based on spatial analysis of GIS in this paper. Results of GIS analysis showed that landslide occurrence in this region closely related to topographic feature. Most areas with high hazard probability were deep-sheared gorge. Most of them in investigation occurred assembly in areas with elevation lower than 3 000 m, due to fragile topographic conditions and intensive human disturbances. Land-cover type, including its change information, was likely an important environmental factor to trigger landslide. Destroy of vegetation driven by increase of population and its demands augmented the probability of landslide in steep slope.

关键词： landslide probability spatial modeling upper Minjiang River

Corrosion Inhibition from Thiol Self-assembly Layer: A High Pressure Perspective

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Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1334-1343页

作者： REN quanqiang QIU Ri School of Materials Science and Engineering Wuhan University of Technology State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of Oceanology Chinese Academy of Sciences

Taking dodecanethiol as the representative, we investigated the corrosion inhibition performance of SAL in seawater under pressures from 0.1 to 9 MPa. By using scanning Kelvin probe, the dodecanethiol SAL is confirmed to build on Cu surface, and the modification of SAL has positively shifted the surface potential to realize the inertness. Electrochemical techniques, such as electrochemical impedance spectroscopy and potentiodynamic polarization were used to reveal the corrosion behavior of Cu modified by SAL under the different pressure, i e, 0.1, 3, 6, and 9 MPa. It is indicated that the longer modification time affords better corrosion resistance to Cu. Higher static pressure is easier to deteriorate the corrosion inhibition capability due to the penetration effect. A plausible mechanism is proposed to illustrate the degradation process of SAL in the high pressure seawater environment.

关键词： high pressure corrosion self-assembled layer copper dodecanethiol