The relationship between mean annual growth rates and the size of cities in the USSR

3 groups of USSR cities are used to study the correlation between city size and the mean annual city growth rates of: 1) oblast capitals of the Russian Soviet Federated Socialist Republics (RSFSR) with diversified machine building; 2) industrial cities of the RSFSR and the Ukraine based on heavy machine building; and 3) small and medium sized textile towns. Results show that the closeness of the relationship between growth rates and city size increases with the number of comparable attributes. The principal factors included are: the level of organization of the city, including its size; its functional and industrial sectoral structure; the degree of saturation with industry; and type of city, probably the key characteristic. The more highly developed a city is, the more important an ntegrated focus it becomes. On the other hand, the lower the level of organization of the city, the more its development will be determined by the function of place. Growth rates of small and medium sized textile towns over the last 20-36 years are roughly 1/5 of the growth rates of oblast capitals and large industrial cities with machine building. Overall, cities of the central economic region constitute a complex system that breaks down into the rhythms of systems of a given type and of different types at various levels of organization. Although cities that are homogeneous in terms of functional, industrial, sectoral, and territorial factors display a correlation between mean annual growth rates and population size, only by looking at these factors in combination, rather than counterposing them to one another, can we identify the objective regularities underlying the growth of cities.     

元古代“拉张”盆地：基于遥感资料的解释

晚元古代Bhima盆地沿印度半岛Dharwar克拉通的东北边缘出露,位于南部太古代结晶基底和北部(晚白垩纪～始新世)Deccan凹陷之间。借助于航空照片和陆地卫星MSS图像以及来自各种印度实验空间站的资料,对这一盆地进行了详细的填图工作(Peshwa等,1986)。 Bhima盆地呈狭窄状北东向斜列式展布。底部的Rabapalli碎屑建造和上部的Shahabad钙质灰岩建造构成了Bhima群。除了在断裂附近之外,这些沉积物均表现出     

基于神经网络模拟的祁连山冰碛垄及其时空变化

采用DGPS测量技术对祁连山东段冷龙岭南坡老龙湾沟和北坡的宁缠河谷、中段的摆浪河谷、西段大雪山老虎沟的小冰期、新冰期和末次冰期的冰碛垄形态分别进行了实地测量和研究.以MATLAB软件为平台,应用人工神经网络方法模拟恢复了各个冰期的冰碛垄形态.结果表明:利用MATLAB人工神经网络方法,在保证模拟高程和实测高程之差不超过...     

基于MATLAB的WGS84坐标到地方坐标的转换

在政务地理信息工程建设时,常会遇到把外业采集的WGS-84坐标数据转化为地方坐标数据的问题。本文研究在控制点坐标资料缺失的情况下,基于MATLAB软件进行多项式拟合,把WGS-84坐标转化为地方坐标的方法。通过研究发现,该方法简单易行,解算精度可以满足一般政务地理信息工程的业务需求。     

1970-2009年纳木错湖泊面积扩张的遥感卫星观测证据及原因之商榷

基于不同时期的遥感影像、航测地形图和DEM, 运用GIS和RS技术对纳木错1970-2009年间湖泊面积变化进行了分析, 利用周边气象台站资料, 通过对纳木错湖面蒸发及降水、冰川融水、非冰川区径流补给的趋势性分析, 从流域水量平衡角度商榷了纳木错湖面扩张的原因. 结果表明: 近40 a来纳木错湖泊面积不断扩张, 尤其是近10 a来最为剧烈, 2001-2009年间湖面扩张超过50 km². 流域降水变化是纳木错湖泊面积扩张的直接原因, 另外伴随蒸发力下降, 湖面蒸发减少也是湖泊面积扩张的原因之一.