梅州市农村城市化问题探讨

着重讨论了农村城市化与农业产业化之间的关系以及小城镇在农村城市化中的作用,认为农业产业化为农村城市化提供了人口、市场和交通线路等条件,抓小城镇建设仍然是今后相当长时间内加快农村城市化进程的必然选择,并就如何推进梅州市农村城市化进程提出了若干对策.     

Human impacts overwhelm the effects of sea-level rise on Basque coastal habitats (N Spain) between 1954 and 2004

According to coastal measurements, global mean sea-level has risen at a rate of 1.8 mm yr⁻¹ between 1950 and 2000, with large spatial variability at regional scales. Within the Bay of Biscay, trends computed from coastal tide gauges records have revealed that sea-level rise is accelerating over this period of time; this is in agreement with rates obtained from satellite imagery in the open ocean since 1993. The objectives of the present study are: (1) to assess the evidence of the relative sea-level rise on coastal morphology and habitats in the Gipuzkoan littoral zone (Basque coast, northern Spain) for the period 1954–2004, and (2) to evaluate the relative contribution of local anthropogenic versus sea-level rise impacts for explaining inter-supratidal habitat changes. A high-resolution airborne laser altimetry data (LIDAR) has been used to derive a Digital Terrain Model (DTM) of 15-cm vertical resolution. Coastal habitats were mapped for two periods, using historic airborne photography (1954) and high-resolution imagery (2004). Analysis of tide gauge records from Santander (northern Spain) has revealed that relative mean sea-level has been rising at a rate of 2.08 ± 0.33 mm yr⁻¹ from 1943 to 2004; this is consistent with sea-level trends from other measurements within the area (St. Jean de Luz and Bilbao), obtained over shorter periods of time, and with previous results obtained in the Bay of Biscay. Based upon this sea-level trend and by means of a LIDAR-based DTM, the results have indicated that the predicted change along the Gipuzkoan coast due to sea-level rise was of 11.1 ha within the 50-yr period. In contrast, comparison of historical and recent orthophotography has detected only 2.95 ha of change, originated possibly from sea-level rise, and 98 ha transformed by anthropogenic impacts. Hence, coastal changes due to sea-level rise might be overwhelmed by excessive human impacts, at the spatial and temporal scales of the analysis. This work highlights that local anthropogenic impact is the major threat to Basque coastal and estuarine habitats, compared with natural erosive processes and global climate change driving forces over recent times.     

冀西北水晶屯金矿床剥蚀程度的判别方法

从冀西北水晶屯金矿近矿围岩蚀变的空间组合、金的指示元素的空间特征、黄铁矿标型特征等多方面地质数据资料入手，来判别矿床的剥蚀程度，认为该金矿床剥蚀程度正处在矿体的中上部。     

多普勒雷达图像在地质灾害气象预警中的应用——以湖南省新邵县“2005．05．31”特大地质灾害气象预警为例

本文介绍了湖南地质灾害概况,通过对暴雨诱发地质灾害的机理分析和多普勒雷达系统监测暴雨的可能性分析,选取地质灾害频发的湖南省作为典型研究区,通过多普勒雷达图像地质灾害气象反演分析和灾害识别研究,精确地预报了湖南省新邵县“2005．05．31”特大地质灾害,论证多普勒雷达是监测突发性地质灾害的有效手段。     

河南老和尚帽预查区资源量及靶区预测

老和尚帽预查区位于桐柏地区围山城金银成矿带以南,老湾金矿带以北,圈有大量1∶ 1万土壤地球化学衬值异常.在大调查桐柏地区银多金属调查评价项目中,以桐柏地区已探明银资源储量的8个矿床、矿点形成的银(衬值)异常为模型单元,采用矿床模型法,建立预测模型;然后对老和尚帽预查区40个预测单元(衬值综合异常)进行资源定量预测与靶区定位预测,确定了8个找矿靶区.经对确定的靶区进行初步查证,发现了矿体和矿化体,取得了一定找矿效果.     

天柱大河边重晶石矿床铅同位素特征及来源探讨

对取自天柱大河边重晶石矿床的重晶石样品和含方铅矿黑色页岩样品进行了铅同位素测定与研究.结果表明,在 Zartman铅构造模式图中,重晶石矿石、含方铅矿黑色页岩和黑色页岩有大致相同的铅同位素分布区,均沿上地壳铅演化线分布,表明它们之间具有同源关系;重晶石矿石及其赋矿黑色页岩的铅同位素组成与基底地层的铅同位素组成在 Zartman铅构造模式图中具有完全不同的分布范围,表明重晶石矿石中的铅不大可能来源于基底地层;结合重晶石矿石及其赋矿黑色页岩的铅同位素组成在 Zartman铅构造模式图和Δγ-Δβ铅来源分类图的分布,天柱大河边重晶石矿床的铅主要具上地壳铅、壳幔混合的俯冲带铅和热水沉积作用铅的混合来源特点,这为天柱大河边重晶石矿床的热水沉积成因提供了铅同位素证据.     

北京城市空间发展和土地利用—伦敦经验启示

Beijing is facing a huge challenge to manage the growth of its built-up area whilst also retaining both productive arable land and land for conservation purposes in order to simultaneously realize the three aims of economic development,protecting arable land and generating environmental improvements. Meanwhile,London,as a world city with more than 200 years of industrialization and urbanization,has accumulated rich theoretical and practical experiences for land use planning in a major urban area,such as the creation of Garden Cities,a designated Green Belt and New Towns. This paper firstly analyzes the main characteristics of the spatial distribution of the built-up area,arable land and conservation land in Beijing. Then,some of the key aspects of urban fringe planning in the London region are examined. Lastly,several implications from the experience of London are provided with respect to land-use planning for Beijing,concentrating on a re-appraisal of land-use functions around Beijing,measures to improve the green belt,the development of small towns to house rural-urban migrants and urban overspill,and effective implementation of land-use planning.     

大国博弈与文化认同——欧盟文化政策浅析

影响欧盟文化政策制定的因素,主要体现在两个层面:欧盟内部各成员国为维护本国核心利益而相互博弈,是欧盟内部影响文化政策制定的主要因素;维护欧盟整体利益,共同对抗美国文化霸权,以及进一步推进和深化欧洲一体化,是影响欧盟文化政策制定的另一重要因素。在内部博弈和外部对抗中,"文化多样性"都被作为重要的筹码广泛运用;与此同时,承认、尊重并维护"文化多样性",从而实现欧洲文化认同,又是实现欧洲一体化的前提和基础,是欧盟文化政策的宗旨和核心。     

The first rural women's network in New South Wales: seventy years of the country women's association

The Country Women's Association of NSW (CWA) is the main voice of rural women in the state. It has been the biggest women's organisation in NSW until very recently. Its significant contribution to rural community development has been overlooked. After its foundation in 1922, the CWA established a widespread women's network, as well as many facilities for women and children. The necessary fund‐raising activities required the organisation of regular social activities in country towns. The CWA has always affirmed women's traditional gender roles, and it has never challenged the male hegemony typical of rural Australia. By contributing to the improvement of rural conditions, to the stability of family life and to local social activities, the CWA has helped to develop the rural economy as well as local and national identity. It has helped women put down roots in country areas. Its future role needs to be defined in the context of the difficult economic situation, and of the changes in gender roles, in rural NSW.     

CORS技术在安溪县数字测图控制中的应用研究

随着GPS应用的普及与其技术的不断研发,用多基站网络RTK技术建立起来的连续运行卫星定位服务综合系统,即CORS已成为GPS的研发重点。本文阐述了CORS及其系统的工作原理,其与静态GPS相比的技术优势,并应用于安溪县数字测图控制测量的生产过程,对应用过程中遇到的问题进行了分析。