共查询到20条相似文献，搜索用时 31 毫秒
1.
"数字地球"与对地观测 总被引：30，自引：1，他引：29
在２１世纪到来之际,人类向“数字地球”这一地球信息科学新领域发起了挑战。这是在信息社会、知识经济、可持续发展时代背景下,由空间科学、信息科学、地球科学和环境科学的相互交融,在全球及区域尺度上的一次大整合、大聚焦。是面向２１世纪地球系统科学思维模式的开拓大跳跃。对地观测技术系统的蓬勃发展,是“数字地球”的不可缺少的基础。数字地球的发展,离不开对地观测技术系统的支撑。 相似文献
2.
3.
4.
5.
6.
7.
8.
林月影 《亚热带资源与环境学报》2001,16(4):59-61
当前高考改革,对地理教学提出了新的具体的能力要求,如读图、分析图、绘图、用图、地理计算、逻辑推理能力、实践能力等.本文通过<地球、地图、地球运动>知识点的复习为例,提出了复习过程对学生进行地理能力和创新思维培养的4个要点. 相似文献
9.
10.
11.
12.
Wobble and nutation of the Earth 总被引：16，自引：0，他引：16
Martin L. Smith 《Geophysical Journal International》1977,50(1):103-140
13.
14.
15.
《New Zealand geographer》1954,10(2):197-200
MAP AND LANDSCAPE. By Dorothy Sylvester.
MAPS AND DIAGRAMS. By F. J. Monkhouse and H. R. Wilkinson.
THE LOOK OF MAPS. By Arthur H. Robinson.
ELEMENTS OF CARTOGRAPHY. By Arthur H. Robinson.
GEOGRAPHY FROM THE AIR. By F. Walker.
OUR WORLD FROM THE AIR. By E. A. Gutkind. London: Chatto and Windus, 1952, pp. 250. 相似文献
MAPS AND DIAGRAMS. By F. J. Monkhouse and H. R. Wilkinson.
THE LOOK OF MAPS. By Arthur H. Robinson.
ELEMENTS OF CARTOGRAPHY. By Arthur H. Robinson.
GEOGRAPHY FROM THE AIR. By F. Walker.
OUR WORLD FROM THE AIR. By E. A. Gutkind. London: Chatto and Windus, 1952, pp. 250. 相似文献
16.
17.
18.
G. M. Blake 《Geophysical Journal International》1977,51(3):555-559
The fossil record of the variation of the solar day and the synodic month with geological time is examined for evidence of the steady contraction of the Earth postulated by Lyttleton to explain a discrepancy between the apparent secular accelerations of the Sun and Moon. Data for the Phanerozoic and the Precambrian agree in showing that a change in the Earth's moment of inertia as large as that suggested by Lyttleton is only consistent with the fossil record if the secular change in the gravitational constant Ġ/ G ≥+ 4 × 10–11 /yr. A variation of G of this magnitude appears to be ruled out by a recent analysis of lunar occultation observations utilizing Atomic Time. 相似文献
19.
20.