快速城市化进程中基于集体土地视角的农村发展分析——以佛山市南海区为例     

丛艳国  章家恩  夏斌 《热带地理》2009,29(3)

上世纪90年代以来珠三角农村依托集体土地大大促进了工业化进程,但因农民及村集体经济组织过度依赖物业出租、宅基地房租金等,其城市化质量并未得到较大的提升,村集体仍然承担着村内公共产品的供给.这种"类国有企业"的运作特征造成村集体经济举步维艰,大量的集体分红更使村集体经济难以进行资本积累以应对市场变化.打破村集体经济的封闭性,引入"外部力量"成为推动农村城市化深入发展的有效途径.  相似文献   

浅谈基于高分辨率卫星影像的地形图快速更新     

姚晓丽  霍爱梅  秦永志  李婧 《测绘与空间地理信息》2022,45(1):112-113,117

随着测绘技术在经济、文化、农业、国防等方面的应用,对测绘技术水平要求越来越高.本文探讨了通过高分辨率卫星影像快速更新地形图的优势,分析现阶段应用过程中存在的问题,并提出了解决思路.  相似文献   

提高温州地震台记录近震的速报质量   总被引：1，自引：1，他引：0  

林胜法  金巧荣  项建权  林良法 《地震地磁观测与研究》2008,29(4):73-77

通过对温州地震台具有代表性的6个典型近震记录图的分析与对比,展示温州地震台近震记录特征,找出快速判定的方法,提高大震速报质量。  相似文献   

Rapid Climatic Change during Past 60 ka Recorded in NE Indian Ocean and Its Correspondence from South China Land     

Fang Nianqiao Chen Xuefang Hu Chaoyong Yin Yong Ding Xuan Zhang Shihong Nie Haogang Institute of Marine Geology  Geophysics  China University of Geosciences  Beijing  China 《中国地质大学学报(英文版)》2000,11(3)

INTRODUCTIONSituated in the low latitudes and the extension of theWest Pacific Worm Pool,the Bay of Bengal and its neighbor-ing waterhosted a greatdeal of terrigenous sedim ents denudedfrom the Tibetan plateau and transported by the Gange-Brahmapoutra fluvial system . Although most parts of the seafloor in the area are occupied by the Bengal deep sea fan,thegreatest turbidite body in the world,turbidity current sedi-mentation does not serve as the only one dynamics to consti-tute the s…  相似文献   

新疆地震台网中心速报卡信息提取软件研制     

陈向军  刘平仁  马学军 《高原地震》2012,24(2):71-72,76

新疆地震台网中心速报卡信息提取软件根据大震应急快速反应的相关要求,结合震情值班室工作实际,提取正式速报卡信息内容,提高了大震应急短信的发布速度。  相似文献   

earthquake disaster rapid assessment for emergency response supported by high-precision data of hazard bearing body     

AN Ji-wen  XU Jing-hai  NIE Gao-zhong  BAI Xian-fu 《地震地质》2015,37(4):1225-1241

The earthquake disaster rapid assessment(EDRA)is the core technical support for the post-earthquake emergency response. At present, with the popularization of high-precision population, social and economic data, most of the subordinate units of China Earthquake Administration(CEA)have heightened the precision of hazard bearing body data used in EDRA from the original county-level precision to the 30″×30″ precision. However, while the precision of fundamental data has been heightened, no efforts have been made to improve the main algorithms and the technical process of EDRA. It turns out that the assessment has become more accurate, but the problems of the time-consuming process(10-20 minutes, probably 20 minutes or more in great earthquakes)and the low-precision losses distributions that exposed in EDRA supported by county-level precision data remain unresolved.This paper introduces the high-precision(30″×30″)hazard bearing body data, and describes the principle of EDRA and its implementation under the support of county-level precision data at first. Then the paper elaborates the principle of improving EDRA's data foundation using high-precision hazard bearing body data, the principle of improving the computation efficiency and persisting the data precision in the assessment process by means of the cell-to-cell grid algebraic operation, and the method for improving the assessment speed through the segmentation and reorganization of the technical process of EDRA.It is validated that through the improvements, the EDRA has become more accurate and much less time-consuming(less than 1 minute), and is able to output high-precision(30″×30″)distributions of seismic losses. The high-precision hazard bearing body data of wide range are the simulated data but not the survey data. Though the data have been simulated based on the census data, there is still a gap between their accuracy and the real situation. Further research and optimization on the data are needed.  相似文献   

煤层气含量快速测定方法   总被引：4，自引：0，他引：4  

庞湘伟 《煤田地质与勘探》2010,38(1):29-32

煤和煤层气地质勘探需要在取到钻孔煤心后的很短时间内获得气含量测值,而现行的煤层气含量测定方法难以满足此要求。基于自然解吸法原理和方法,以自然解吸法的测定结果为基准,在保证解吸量、气组成及其含量基本不变的前提下,通过连续观测、适当提高解吸温度等途径,合理、有效地加速解吸。以快速测定法与自然解吸法的对比试验结果为依据,建立了煤层气含量快速测定方法。此方法将煤层气含量测定周期缩短为几h~几d,可以满足煤和煤层气勘探的需求。   相似文献   

简易远震警报器的制作与使用     

王斌  梁慧  张晋川  石磊 《四川地震》2010,(4)

本文介绍了一款位移触发远震警报器的制作方法与使用情况,由此提高了速报地震的报警率,有效减少了台站在地震速报中的晚报、漏报现象。  相似文献   

太阳射电快速频漂和偏振逆转波的传播解释     

姚金兴  于兴凤 《中国天文和天体物理学报》1996,(1)

本文研究了寻常波和非常波在线性传播条件下，对快速毫秒级spike的时延、频漂和偏振逆转的影响．计算表明，在（20－40）×Baumbach－Alien的电子密度分布下，由于传播产生的时延，偏振逆转等约为30－300ms，这与观测结果在量级上是一致的．这说明在快速活动中传播效应是一个重要的因素．  相似文献   

智能全站仪快速测量处理系统   总被引：3，自引：0，他引：3  

包欢朱江  付子傲张弟 《测绘学院学报》2005,22(4):256-258

介绍了智能全站仪的组成、测量原理及其发展应用,并开发了基于智能全站仪的快速测量处理系统.通过与传统测量方法进行对比,实测表明该系统自动化程度高、实用性强、实时高效,是进行各种控制测量的理想系统.  相似文献