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基于3S技术的城乡区域生态节点的识别与分析 被引量:10
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作者 乌尼图 岳德鹏 +2 位作者 张亦超 曹睿 尚书 《环境科学与技术》 CAS CSCD 北大核心 2014年第2期184-189,共6页
以北京市朝阳区为例,通过识别和分析生态节点的重要性来对区域生态安全格局的构建、维护区域生态系统等提供借鉴。文章基于"3S"技术结合生态服务功能和景观生态学理论,将生态服务功能较强的生态斑块作为生态源地,利用累计耗... 以北京市朝阳区为例,通过识别和分析生态节点的重要性来对区域生态安全格局的构建、维护区域生态系统等提供借鉴。文章基于"3S"技术结合生态服务功能和景观生态学理论,将生态服务功能较强的生态斑块作为生态源地,利用累计耗费阻力模型计算生成累计耗费距离面,提取阻碍生态流的最小耗费路径和最大耗费路径的交叉点以及生态廊道最薄弱的点,将这些点作为研究区潜在的生态节点。利用景观连接度指数来分析研究区已建有的小于10 hm2的绿地和水域生态节点斑块对整个区域的重要性。通过分析去除节点斑块之前和之后数据可得NC、IIC和PC指数分别从之前的21、0.006 7和0.017 3降至之后的18、0.006 3和0.015 5,可知生态节点在区域生态斑块之间的连接、生态流的运行、生态廊道的贯通起着关键性的作用。生态节点的建设对区域生态安全格局构建、区域可持续发展等有着重要的影响。 展开更多
关键词 '3s'技术 区域生态安全格局 生态节点 朝阳区
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3S技术在水土保持动态监测中的应用
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作者 余杰 《区域治理》 2018年第32期287-287,共1页
'3S'技术是集遥感、全球定位与地理信息系统于一体的高新技术手段,它可以快速、准确地获得地面各种信息.文章对'3S'技术在信息获取、信息加工、信息管理等几方面在水土保持动态监测中的应用进行了介绍,以供参考.
关键词 '3s'技术 水土保持 生态环境 动态监测
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卫星遥感技术在红树林生态监测与研究中的应用进展 被引量:11
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作者 翁强 卢昌义 《三明学院学报》 2006年第2期141-147,共7页
遥感技术是红树林生态监测中的关键技术。详细介绍了卫星遥感数据在红树林生态监测中的应用,叙述了人工目视解译、波段组合法、图像分类技术和模式分类等信息识别方法在探测红树林的生态学指标包括面积、分布范围、类内区分和类外区分... 遥感技术是红树林生态监测中的关键技术。详细介绍了卫星遥感数据在红树林生态监测中的应用,叙述了人工目视解译、波段组合法、图像分类技术和模式分类等信息识别方法在探测红树林的生态学指标包括面积、分布范围、类内区分和类外区分以及动态变化等的应用和精度对比情况。此外,阐述了全球定位系统、地理信息系统和遥感技术在红树林生态监测中的综合应用的优势以及红树林遥感技术的发展前景。 展开更多
关键词 红树林 遥感 '3s'技术
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Dynamic Crop Information System Design and Implementation Based on 3 s Technology in Shaanxi Province
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作者 Zhang Liping Meng Weiping 《International Journal of Technology Management》 2013年第9期107-109,共3页
By using 3s technology, the dynamic crop information system can be developed to meet the needs of sharing the agriculture information in Shaanxi Province. The dynamic crop information system can realize the query of c... By using 3s technology, the dynamic crop information system can be developed to meet the needs of sharing the agriculture information in Shaanxi Province. The dynamic crop information system can realize the query of crop information attribute and space, and the automatic acquirement, dynamic distribution and classification analysis of crop information. In this way, the whole process of real-time management of agricultural product with information and visualization can be carried out, which is to improve the level of agriculture information management automation in Shaanxi Province. 展开更多
关键词 3s technology Shaanxi Province crop information system
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Remote Sensing Dynamic Monitoring System for Agricultural Disaster in Henan Province Based on Multi-source Satellite Data
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作者 刘婷 王来刚 +1 位作者 左守亭 杨春华 《Agricultural Science & Technology》 CAS 2013年第1期155-161,共7页
Using 3S technology, relying on earth-space three-dimensional agriculture disaster monitoring network, remote sensing monitoring model for agricultural disaster in Henan Province was established, and agricultural disa... Using 3S technology, relying on earth-space three-dimensional agriculture disaster monitoring network, remote sensing monitoring model for agricultural disaster in Henan Province was established, and agricultural disaster monitoring system plat- form of Henan Province based on multi-souroe satellite data was further constructed, which realizes dynamic monitoring of agricultural disasters in Henan Province (drought, flood, snow cover and straw burning). 展开更多
关键词 Agricultural disaster Remote sensing monitoring 3S technology System application Henan Province
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The Research of Ecology-Oriented Reasonable Deployment of Water Resources at Shuangtaizi Estuary Wetland
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作者 LU Xiaofeng WANG Tieliang SU Fangli ZHOU Linfei LI Bo 《Journal of Ocean University of China》 SCIE CAS 2011年第2期142-146,共5页
Shuangtaizi estuary wetland, the largest natural conservation district in China, and one of the best preserved, largest ecological lands with the most complete vegetation types in the world, is located in Panjin city,... Shuangtaizi estuary wetland, the largest natural conservation district in China, and one of the best preserved, largest ecological lands with the most complete vegetation types in the world, is located in Panjin city, Liaoning Province. In recent years, the degradation of Shuangtaizi estuary wetland is very serious. In order to rescue lives in the wetland and protect valuable natural resources, the information system of Shuangtaizi estuary wetland was built with '3S' technology, and the minimum, optimum, and maximum eco-environmental water requirements were calculated respectively. Furthermore, for restoring the ecological functions of wetland and preventing wetland degradation, the balance between supply and demand of water resource was analyzed , and an optimal allocation scheme of water resources was proposed based on three kinds of equilibrium. 展开更多
关键词 WETLAND eco-environmental water requirements water resources optimization allocation
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Integrable Deformations of Heisenberg Supermagnetic Model
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作者 颜昭雯 李民丽 +1 位作者 吴可 赵伟忠 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第1期21-24,共4页
We construct the integrable deformations of the Heisenberg supermagnet model with the quadratic constraints (i) S2=3S - 2I, for S ∈ USPL(2/1)/S(U(2)×U(1)) and (ii) S2=S, for S ∈ USPL(2/1)/S(L(1/... We construct the integrable deformations of the Heisenberg supermagnet model with the quadratic constraints (i) S2=3S - 2I, for S ∈ USPL(2/1)/S(U(2)×U(1)) and (ii) S2=S, for S ∈ USPL(2/1)/S(L(1/1)×U(1)). Under the gauge transformation, their corresponding gauge equivalent counterparts are derived. They are the Grassman odd and super mixed derivative nonlinear Schrodinger equation, respectively. 展开更多
关键词 Heisenberg supermagnet model SUPERSYMMETRY integrable equation
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Bottomonium Spectrum with Screened Potential
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作者 LI Bai-Qing CHAO Kuang-Ta 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第10期653-661,共9页
As a sister work of[Phys. Rev. D 79 (2009) 094004], we incorporate the color-screening effect due to light quark pair creation into the heavy quark-antiquark potential, and investigate the effects of screened potent... As a sister work of[Phys. Rev. D 79 (2009) 094004], we incorporate the color-screening effect due to light quark pair creation into the heavy quark-antiquark potential, and investigate the effects of screened potential on the spectrum of bottomonimn. We calculate the masses, electromagnetic decays, and E1 transitions of bottomonium states. We find that the fine splittings between χbJ (J = 0, 1, 2) states are in good agreement with experimental data, and the E1 transition rates of γ(2S) → γχbJ(1P) and γ(3S) →γχbJ(2P) (J = 0, 1, 2) all agree with data within experimental errors. In particular, the mass of γ(6S) is lowered down to match that of the γ(11020), which is smaller than the predictions of the linear potential models by more than 100 MeV. Comparison between charmonium and bottomonium in some related problems is also discussed. 展开更多
关键词 color-screening effect BOTTOMONIUM
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