【摘 要】
:
With the rapid economic development during the last 30 years in China, more and more disparities have emerged among different regions. It has been one of the hot topics in the fields of physical geogr
【出 处】
:
Journal of Geographical Sciences
论文部分内容阅读
With the rapid economic development during the last 30 years in China, more and more disparities have emerged among different regions. It has been one of the hot topics in the fields of physical geography and economic geography, and also has been the t
其他文献
——标准地平线GPS海图测绘仪配套VHF/DSC无线电通信设备成为游艇上能够配置的最先进技术,堪称最佳组合之电子导航产品。以标准地平线的CPV550为主集成的一款游艇海图测绘仪结合VHF/DSC无线电通信设备成套仪器体现出独立配置和用户友好的特性。用户一旦拥有了这款完整成套并且适用性相当广泛的导
通过索引现实,Earthmine将深奥的语义数据带到真实世界的3D全景画中。"坐地日行八万里",足不出户,即可漫步在与现实世界一样的虚拟街头,这样的梦想离实现还要多久?在过去的几年里,我们目睹了微软所开发的Photosynth、Virtual Earth等产品的推出,目睹了Google(www.g.cn)在电子地图领域所做
We establish an improved GP iterative algorithm for the extrapolation of band-limited function to fully 3-dimensional image reconstruction by the convolution-backprojection algorithm. Numerical experi
In this study,remote sensing data of Wuhan City,Hubei Province,China in 1996-2001 were selected to ex-tract wetland landscape information.Several landscape indices were used to evaluate the changes of
对取自首都钢铁厂附近的土壤样芯进行了重金属含量、形态分析和的磁学测量.探讨了利用磁参数追踪和指示重金属污染和有机结合态和铁锰氧化结合态重金属的可行性.结果表明:土壤样芯中Cu、Pb、Zn、Fe和Mn的含量与χ、SIRM和ARM存在着十分相似的垂向变化特征,且相关关系显著(0.98>R>0.86).进一步对磁化率和Cu、Pb、Zn、Fe和Mn各结合态进行相关分析表明:五种元素的有机结合态与铁锰结合态
除了每年经过这里的大群候鸟之外,盐城的沿海滩涂同样也为许许多多生活在海洋和河口中的生物提供了生存的家园。对于这些生物来说,湿地拥有缓慢的水流,充足的食物和稀少的天敌,是它们不可多得的美好生活空间。
MODIS-Terra和MERIS数据被用于芬兰湾蓝藻水华的监测,并对两者的性能进行了比较.研究结果表明:MODIS-Terra波段设置主要针对一类大洋水体,缺乏预警藻蓝素的有效波段;MERIS传感器设置了620nm和665nm波段,基本对应藻蓝素的吸收峰(630nm)和反射峰(650nm),具有蓝藻水华探测的潜力,但在藻华未成型之前,海岸带水体不同优势藻类具有相似的叶绿素特征,较难辨别蓝藻水华.
"第七大陆" 南极洲位于地球最南端,土地几乎都在南极圈内,四周濒太平洋、印度洋和大西洋。是世界上地理纬度最高的一个洲,也叫"第七大陆"。
简要介绍了近几年测绘学前沿科技领域的最新成果及其应用范围。
Swept volume solid modeling has been applied to many areas such as NC machining simulation and verification, robot workspace analysis, collision detection, and CAD. But self-intersections continue to