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基于GIS技术的典型省际交界区域土地开发适宜评价
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作者 范树平 程从坤 +2 位作者 项思可 张红梅 王栋 《水土保持研究》 CSCD 北大核心 2013年第3期218-225,共8页
以承接产业转移,促进产业及其用地优化配置为研究背景,选取典型省际交界区域的皖东滁州市,从资源约束、发展引导两大视角,构建土地开发适宜度评价指标体系,运用GIS空间数据挖掘、分析及输出显示等功能,形成90×17面板数据,采用多因... 以承接产业转移,促进产业及其用地优化配置为研究背景,选取典型省际交界区域的皖东滁州市,从资源约束、发展引导两大视角,构建土地开发适宜度评价指标体系,运用GIS空间数据挖掘、分析及输出显示等功能,形成90×17面板数据,采用多因子综合评价法与逻辑象限模型,完成滁州市域土地开发适宜度评价,并提出差别化土地利用分区对策。结果表明:重点开发区域范围涉及市县辖区及周边紧邻镇域,集中于区域社会经济发展较好的地区;后备开发区域集中于天长市大部、明光市北部、全椒南部等地区,其他地区也有零星分布;限制开发区域主要分布于定远县及凤阳县的平原地区,以及明光市与来安县交界山地丘陵区域;协调开发区域仅是南谯区及周边乡镇,以及定城镇、炉桥镇与六镇镇等区域。 展开更多
关键词 土地开发适宜性 GIS 象限模型 滁州市
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双星形联结发电机供电的24脉波变流器及其控制
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作者 郑雪 李维斌 +1 位作者 陈俊宏 王雅丽 《控制与信息技术》 2021年第1期52-57,共6页
稳定的等离子体放电是开展高质量物理实验的主要基础,在等离子体垂直位移发生偏移时,需对其进行反馈控制以修正偏移量。为了对等离子体垂直位移进行有源反馈控制,文章设计了一种24脉波变流器,其需要满足特殊的供电条件,即双星形联结发... 稳定的等离子体放电是开展高质量物理实验的主要基础,在等离子体垂直位移发生偏移时,需对其进行反馈控制以修正偏移量。为了对等离子体垂直位移进行有源反馈控制,文章设计了一种24脉波变流器,其需要满足特殊的供电条件,即双星形联结发电机供电。优化设计的24脉波变流器,其通过正、负两组变流器协同工作,实现大电流下的四象限运行;通过变压器和变流器的有序组合,使得发电机两个星级供电的负荷均衡;采用逻辑带环流的控制方式,使得电流过零连续平滑;并充分利用双星形联结发电机阻抗较大的特点来抑制环流,且省去平衡电抗器,降低了电源成本。仿真结果表明,这种24脉波变流器在双星形联结发电机供电的特殊供电条件下,能够满足等离子体垂直不稳定控制的基本要求。 展开更多
关键词 24脉波变流器 四象限变流器 逻辑带环流模式 托卡马克装置
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Evaluation of the Land Development Suitability in the Typical Provincial Boundary Regions Based on GIS Technology
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作者 Shuping FAN Congkun CHENG +2 位作者 Sike XIANG Hongmei ZHANG Dong WANG 《Asian Agricultural Research》 2013年第11期76-83,共8页
To undertake the transfer of industry to promote the industry and its optimization of land use configuration as the research background,a typical provincial boundary region in Chuzhou City of eastern Anhui region was ... To undertake the transfer of industry to promote the industry and its optimization of land use configuration as the research background,a typical provincial boundary region in Chuzhou City of eastern Anhui region was selected as an example from as two perspectives of resource constraint and development guidance.Land development suitability evaluation index system was constructed by using GIS spatial data mining,analysis,output display and other functions,panel data with 90×17 were formatted.multi-factor comprehensive evaluation method and logic quadrant model were used to complete the Chuzhou domain land development suitability evaluation,and the differentiated land use zoning countermeasures were proposed.The results show that priority development region covering the county area adjacent to town and surrounding area is the regional socio-economic development of better concentrated area;reserve development region focus on most of Tianchang,north Mingguang,south Quanjiao and other regions,other areas of sporadic distribution;restricted development area mainly distributed in Dingyuan and Fengyang plain area,as well as hilly area at the junction,and of Mingguang and Lai'an;coordinately development of region is the only district and the surrounding township,as well as towns including Dingcheng,Louqiang and Liuzhen. 展开更多
关键词 LAND development SUITABILITY GIS logic quadrant mo
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