检索结果-南通市图书馆

Wuhan University Journal of Natural sciences 2005年第4期10卷 779-784页

作者： zhang ren-jun 1,2.1. Institute of {2. hazards and environment, chinese academy of sciences, chengdu 61.041. sichuan, china 2. Graduated School of the chinese academy of sciences, Beijing 100039, china Institute of mountain hazards and {2. Chinese Academy of Sciences Chengdu 610041 Sichuan China

Based on the study of visitors' individual spatial behaviors, a tourists'spatial behavior simulator (TSBS) to assess the carrying capacity of tourist resorts was developed,TSBS employs GIS (Geographic Information System) to manage the spatial data,and Multi-Agent systemto simulate the actions of individual visitors. By utilizing TSBS, visitors' travel patterns such aslocation, cost, and state can be analyzed and predicted. Based on this analysis and prediction, themodel of assessing the carrying capacity of resorts is built. Our results show that TSBS will be aneffective tool to accurately assess the carrying capacity of tourist resorts.

关键词： tourist resort carrying capacity TSBS GIS Multi-Agent simulator

Dynamic Identification and Evolution of Urban-suburban-rural Transition Zones Based on the Blender of Natural and Humanistic Factors: A Case Study of chengdu, china

在线全文

学校读者我要写书评

暂无评论

chinese Geographical Science 2024年第5期34卷 791-809页

作者： DENG Wei JIANG Zhenyuan zhang Shaoyao ren Ping zhang Hao WANG Zhanyun The Faculty Geography Resources Science Sichuan Normal UniversityChengdu 610101China Sustainable Development Research Center of Resources and environment in Western sichuan Sichuan Normal UniversityChengdu 610101China Institute of mountain hazards and {2. Chinese Academy of SciencesChengdu 610041China

Urban-suburban-rural(U-S-R)zones exhibit distinctive transitional characteristics in interaction between human and nature.U-S-R transition zones(U-S-RTZ)are also highlighting the function diversity and landscape heterogeneity across territorial *** a super megacity in western china,chengdu’s rapid urbanization has driven the evolution of U-S-R spaces,resulting in a sequential *** promote the high-quality spatial development of urban-rural region in a structured and efficient manner,it is essential to con-duct a scientific examination of the multidimensional interconnection within the U-S-RTZ *** proposing a novel identifica-tion method of U-S-RTZ and taking chengdu,china as a case study,grounded in a blender of natural and humanistic factors,this study quantitatively delineated and explored the spatial evolutions of U-S-RTZ and stated the optimization orientation and sustainable devel-opment strategies of the production-living-ecological spaces along the U-S-R *** results show that:1)it is suitable for the quantitative analysis of U-S-RTZ by established three-dimensional identification system in this study.2.In 1990-2.2.,the urban-sub-urban transition zones(U-STZ)in chengdu have continuously undergone a substantial increase,and the scale of the suburban-rural transition zones(S-RTZ)has continued to expand slightly,while the space of rural-ecological transition zones(R-ETZ)has noticeably compressed.3)The landuse dynamics within U-S-RTZ has gradually increased in *** main direction of landuse transition was from farmland to construction land or woodlands,with the expansion of construction land being the most significant.4)R-ETZ primarily focus on ecological functions,and there is a trade-off relationship between the production-ecological function within the S-RTZ,and in the U-STZ,production-living composite functions are *** study emphasizes the importance of elastic planning and precise governance within the U-

关键词： transition zone urban-suburban-rural zones spatial identification evolution mechanism chengdu,china

Rural Public Investment and Benefit in sichuan's Hilly and mountainous Areas

在线全文

学校读者我要写书评

暂无评论

Asian Agricultural Research 2012年第8期4卷 28-32页

作者： zhang Hai-qin 1,3 ,LIU Shao-quan 1 ,LUO ren-fu 2.,zhang Lin-xiu 2.1. Institute of mountain hazards and environment,chinese academy of sciences,chengdu 61.041.{12. 2. Institute of Geographic sciences and Natural Resources Research,chinese academy of sciences,Beijing 100101,{12. 3. Graduate University of chinese academy of sciences,Beijing 100049,{12.

Using representative sampling survey data,we take the case of roads,domestic water,irrigation facilities,clinics and schools,to give an overview of the status quo of rural public investment in sichuan's hilly and mountainous areas in the period 2.05 -2.08; conduct comprehensive analysis of public investment benefit,from the status quo of supply and demand,social benefit and villagers' satisfaction. The results show that the social benefit arising from the construction of road projects is good,while the social benefit arising from the construction of irrigation facilities is poor; the matching effect of supply and demand of public investment is poor,especially for the investment in irrigation facilities; on the whole,villagers' satisfaction with public investment has been promoted,but most of the villagers are still unsatisfied with the cur{2.t irrigation facilities. The major capital source of rural public investment is from the government,but from the perspective of the villagers' demand,we should further increase the public financial input.

关键词： Rural public investment Social benefit index Evalu

Climate-Vegetation Coverage Interactions in the Hengduan mountains Area, Southeastern Tibetan Plateau, and Their Downstream Effects

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric sciences 2024年第4期41卷 701-716页

作者： Congxi FANG Jinlei CHEN Chaojun OUYANG Lu WANG Changfeng SUN Quan zhang jun WEN Key Laboratory of mountain hazards and Earth Surface Processes Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610299China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Urban and environmental sciences Peking UniversityBeijing 100871China Institute of Global environmental Change Xi’an Jiaotong UniversityXi’an 710049China The State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China College of Atmospheric sciences Chengdu University of Information TechnologyChengdu 610225China

Little is known about the mechanism of climate-vegetation coverage coupled changes in the Tibetan Plateau(TP)region,which is the most climatically sensitive and ecologically fragile region with the highest terrain in the *** study,using multisource datasets(including satellite data and meteorological observations and reanalysis data)revealed the mutual feedback mechanisms between changes in climate(temperature and precipitation)and vegetation coverage in recent decades in the Hengduan mountains Area(HMA)of the southeastern TP and their influences on climate in the downstream region,the sichuan Basin(SCB).There is mutual facilitation between rising air temperature and increasing vegetation coverage in the HMA,which is most significant during winter,and then during spring,but insignificant during summer and *** temperature significantly enhances local vegetation coverage,and vegetation greening in turn heats the atmosphere via enhancing net heat flux from the surface to the *** atmospheric heating anomaly over the HMA thickens the atmospheric column and increases upper air *** high pressure anomaly disperses downstream via the westerly flow,expands across the SCB,and eventually increases the SCB *** effect lasts from winter to the following spring,which may cause the maximum increasing t{2.d of the SCB temperature and vegetation coverage in *** results are helpful for estimating future t{2.ds in climate and eco-environmental variations in the HMA and SCB under warming scenarios,as well as seasonal forecasting based on the connection between the HMA eco-environment and SCB climate.

关键词： Hengduan mountains Area normalized difference vegetation index climate change net heat flux downstream effects

The Analysis of CO2.Influence Factors in Tianquan Cave of Xingwen World Geopark

在线全文

学校读者我要写书评

暂无评论

四川地质学报 2009年第S1期 113-119页

作者： SHUI Wei 1 HU Yi 2.zhang Bing 3 SU Zheng-an 4 WANG Chen-yi 2.ren De-you 3 XU Xue-yi 1 CHENG Jin-ping {2.Department of Eco-agriculture and Rural Development,sichuan Agricultural University,Ya'an 62.014,sichuan 2.College of Resources and environment,sichuan Agricultural University,Ya'an 62.014,sichuan 3.School of Land and Resources,china West Normal University,Nanchong 637002.sichuan 4.Institute of mountain hazards and environment,chinese academy of sciences and Ministry of Water Conservancy,chengdu 61.041.sichuan)

A Vaisala CARBOCAP Hand-Held Carbon Dioxide Meter GM70 was used to measure CO 2.concentration in Tianquan cave of Xingwen world *** study was done in Tianquan cave during July and August,*** sources include the influence factors of distribution of CO 2.elevation,tourists,cross section and depth of the *** indicated tourists have strong impacts on the CO 2.concentration,while no significant differences could be found among different ***,significant correlation could be found among the depth of cave,the small cross section,the tourist's construction and the CO 2.*** results indicate that the CO 2.concentration in Tianquan cave has no threat to the health of *** results and the data provide a scientific basis for the protection of people's health and the exploitation of cave tourism.

关键词： Xingwen world Geopark Tianquan cave CO 2.concentration Influence factors

Researches on Heavy Metals Accumulation of Greening Trees Species in Lanzhou City

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Researches on Heavy Metals Accumulation of Greening Trees Sp...

海峡两岸三地环境与资源学术研讨会暨第二届中国环境资源与生态保育学会会员代表大会

作者： DU Zhong~(1,3),ren jun~2.TAO Ling~{2.Institute of mountain hazards and environment,chinese academy of sciences,P.R.china,61.041.2.School of environmental and Municipal Engineering of Lanzhou Jiaotong University,P.R.china,730070 3 Graduate University of chinese academy of sciences,P.R.china,100049

The atmospheric heavy metals pollution is one of the most serious problems that obsessing the world urban *** application of greening tree species to absorb the heavy metals in the atmosphere is an important method in the atmospheric pollution *** order to select monitoring and effective greening tree species to purify the heavy metals pollution,four common greening tree species in five selected polluted areas are chosen to measure the heavy metals *** concentration of heavy metals in tree species leaves was obviously associated with the heavy metals properties,pollution conditions and tree species *** potential Pb accumulation capacity of different greening tree species appeared in the order of Sabina chiesis>Sophora japonica>Buxus microphylla>Populus *** for Cu,the accumulation capacity can be ranked as Sabina chiesis>Populus tomentosa>Sophora japonica>Buxus *** tomentosa had the highest accumulation capacity for Cd,While Sophora japonica for ***,the overall degree of atmospheric heavy metals pollution in the investigated areas can be shown as follows:XiGuan>Rubber plant>Petroleum plant>Xizhan>*** results can offer theoretical practices for the management of air pollution in Lanzhou city.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

矿井微震与电法耦合监测技术

煤炭学报 2024年第1期49卷 586-600页

作者：刘盛东杨彩章俊李纯阳任川中国矿业大学深地工程智能建造与健康运维全国重点实验室江苏徐州221116 中国矿业大学矿山互联网应用技术国家地方联合工程实验室江苏徐州221116 中国矿业大学物联网(感知矿山)研究中心江苏徐州221116 中国矿业大学资源与地球科学学院江苏徐州221116 安徽惠洲地质安全研究院股份有限公司安徽合肥230088

随着煤炭资源开采区域、深度及强度的增加,矿井工作面采掘扰动极易诱发矿井突水事故,严重威胁我国煤炭资源安全开采。矿井水害事故的发生主要是岩体采动破裂与矿井水渗流共同作用的结果。研究表明,微震信号的纵横波到时、幅值、频率等... 详细信息

随着煤炭资源开采区域、深度及强度的增加,矿井工作面采掘扰动极易诱发矿井突水事故,严重威胁我国煤炭资源安全开采。矿井水害事故的发生主要是岩体采动破裂与矿井水渗流共同作用的结果。研究表明,微震信号的纵横波到时、幅值、频率等参量可有效表征岩体破裂位置、强度及其震源机制,地电场信号中的电阻率、激励电流及自然电位等参量可有效表征岩体渗流演化过程。透水通道形成对应微震场特征,地下水渗流对应地电场特征,因此微震电法耦合方法对矿井水害孕育发展过程具有监测预警的功能,可有效对采动破坏过程中形成的突水通道、水源位置及渗流过程等水害三要素进行精准捕捉;减少单一地球物理方法多解性,提高水害监测预警精度,对煤矿防治水意义重大。当前,微震与电法耦合监测技术在煤矿水害实时动态监测中开始得到应用,突破传统微震与电法独立采集的局限,课题组自主研发了国内外首款煤安认证的微震与电法耦合并行监测系统,该系统以微震场与地电场并行采集基站为核心,集被动源微震波场与主被动地电场为一体,通过连接矿井物联网,实现远程数据采集控制、传输及云端存储;其一体化网络服务器主机可连接多个采集基站,并将微震检波器、电法激励电极与电位测量电极进行相互隔离、并行采集,形成微震事件密度与能级分布、电阻率分布、自然电位分布等时空云图来监测预判水害三要素。微震与电法耦合监测技术仍需在微震事件智能识别与定位、地电场的电阻率三维反演以及自然电位渗流反演方面进行专项攻关;结合并行监测的微震电法大数据集,重点在微震电法数据联合反演、智能化监测预警方向开展进一步研究。微震与电法耦合监测技术,作为矿井水害的主动预警监测新方法,可为我国智能化矿井建设发挥重要作用。

关键词：微震与电法耦合主被动一体化监测预警煤矿水害智能矿山

在线全文

学校读者我要写书评

暂无评论

柴北缘西段绿梁山早古生代复式花岗岩体成因

地球科学 2024年第9期49卷 3106-3121页

作者：张懿朱小辉蒲永霞张君任云飞王海杰孔红喜陈丹玲中国石油青海油田勘探开发研究院青海省高原咸化湖盆油气地质重点实验室延安大学油气资源高效开发与生态环境保护陕西省高校工程研究中心石油工程与环境工程学院西北大学大陆动力学国家重点实验室地质学系

为探讨柴北缘西段绿梁山复式岩体的成因及其与大陆深俯冲-折返过程的关系，对其开展了系统的岩石学、地球化学和同位素年代学研究.结果表明，该复式岩体由三期中酸性侵入岩构成，是柴北缘构造带早古生代陆壳深俯冲-折返到造山带垮塌过... 详细信息

为探讨柴北缘西段绿梁山复式岩体的成因及其与大陆深俯冲-折返过程的关系，对其开展了系统的岩石学、地球化学和同位素年代学研究.结果表明，该复式岩体由三期中酸性侵入岩构成，是柴北缘构造带早古生代陆壳深俯冲-折返到造山带垮塌过程的岩浆响应.其中，Ⅰ期为似斑状花岗闪长岩，规模较小，形成年龄为436～430 Ma，是陆壳深俯冲/碰撞过程中加厚镁铁质下地壳部分熔融的产物；Ⅱ期为英云闪长岩-正长花岗岩-二长花岗岩，年龄介于400～390 Ma，由折返的超高压榴辉岩和下地壳镁铁质岩石在地壳伸展背景下部分熔融形成；Ⅲ期二云母花岗岩为绿梁山复式岩体的主体，形成年龄为365～360 Ma，具强过铝质S型花岗岩特征，是造山带去根、垮塌阶段中、上地壳变泥质岩部分熔融的产物.

关键词：地球化学锆石U-Pb年代学花岗岩绿梁山柴北缘岩石学